STRUCTURE ARTICULATION DEVICE

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The present invention concerns a perfected invisible hidden door hinge.

The type of so-called "invisible hidden" hinges is used for a hidden positioning between a door and a relevant jamb. Generally the hinges of this type comprise two connecting bodies, one on the jamb side and one on the door side, respectively insertable in the jamb or in the leaf of the door. The two connecting bodies are connected to each other by an articulation device, generally composed of hinge arms structured in such a way to ensure the relative movement of the two connecting bodies (and, therefore, of the door with respect to the jamb). With the door closed, the hinge arms are received in a housing compartment formed in combination by the two connection bodies which face one another, thus making the hinge invisible from both sides of the door. A support structure of the connecting bodies is the connecting body between the articulation device and the door or the jamb, in particular interacting with and/or supporting, in correspondence of two of its end portions, fixing means for fixing the hinge to the jamb or the door. Said fixing means can be engaged directly to the support structure or acting between it and the jamb or the door by means of one or more intermediate elements.

In some cases, the hinge provides a limited number of components: the connecting body is reduced substantially to the relevant support structure (apart from the fixing means and possible intermediate elements) and the hinge, therefore, it substantially reduces to the two support structures connected to one another via the articulation device. Usually, however, the hinge has a greater number of components, especially when it is realized in one or more adjustments of position along one or more respective directions in space. In this case one or both of the connecting bodies comprise, in addition to the support structure, one or more movable bodies and/or one or more movable inserts associated in various ways to the support structure (and by this directly or indirectly supported), each being movable with respect to the other and/or to the support structure for a respective adjustment position. In the connecting body a generally nested structure is then realized, in which the articulation device is engaged to each connecting body directly on the movable body or movable inserts wich are most distal from the support structure. In the prior art, the structure of support and movable bodies therein nested generally have a central cavity and, on opposite sides of the latter, flat flange portions for the engagement of fixing and/or adjusting means. The movements of various movable bodies and/or movable inserts with respect to each other, and/or with respect to the support structure, are realized by means of respective adjusting means. Even the articulation device can be more or less complex, depending on the elements that compose it and on their shapes.

In general, in order to ensure the movements and/or the necessary adjustments, each of the main components of the hinge (the support structures, the movable parts and/or movable inserts, the arms or arm elements that compose the articulation device) must have geometrically complex shapes and are characterized by numerous details, each of which must be made with precision to ensure the correct operation of the hinge. In particular, in a hinge provided with movable bodies and/or movable inserts, presenting a certain complexity is a detail useful for a position adjustment. Specifically, it deals with realizing, in a flat flange of a movable body and/or a movable insert, a seat for inserting the head of an adjusting actuator, which allows the rotation of the adjustment actuator about an axis and, at the same time, prevents its translation along the same axis. This is generally a housing groove locally complementary to the shape of the actuator itself.

The complexity of the structure of the main components of the hinge and the high precision required in their construction, are accompanied by the need to realize these main components of the hinge in a material having adequate mechanical strength to enable the hinge to support the weight doors which have even considerable weight.

To obtain the required effect, commonly one resorts to the use of structures of metal material, obtained by casting and injection molding with the necessary form. In general, an alloy of zinc and aluminum is used, which guarantees the obtention, in suitable molds, of the wished forms having the necessary accuracy. Such a material, however, has a limit of mechanical seal which forces the creation of structures that, in their parts, have different and significant thicknesses, with the consequence of consumption of a large amount of material and increase of costs. In some applications, the components are manufactured with the same technology, but using as material the steel, which is more performing. However, the injection molding using the of molten steel is a complex technology, which requires numerous processing steps and, since it does not ensure the accuracy of the various parts, it requires an injection molding for subsequent stages and/or mechanical machining performed on the workpiece subsequently to its formation by injection molding. Once again, the use of unequal material thicknesses occurs, with the consequent use (and loss) of considerable amounts of material. To try to overcome this problem without sacrificing the mechanical characteristics of the steel, in some cases one renounces to the complexity of the structure of some of the hinge components and realizes the support structure and the movable bodies as simple narrow and elongated metal sheets, whose central part is folded in as a "U". One or more metal sheets can be placed on one another to realize the support structure and the relative movable bodies (in particular by nesting the "U" portions of the metal sheets one inside the other and leaning the remaining portions of the metal sheets that are located on opposite sides of said "U"-shape on one another). To obtain the necessary mechanical rigidity to support the doors having not negligible weight by means of the thus obtained hinges, the metal sheets used must have a very high thickness, thus making necessary the use of a large amount of material (because of the stiffness of the material to be machined) and making very difficult the production of the thus constructed hinge components. The obtained hinges, then, have an open structure which, in addition to being aesthetically unpleasant, can cause installation problems in the jamb or in the door leaf. Once installed the hinge in the corresponding notches in the door jamb or in the door leaf, indeed, often the foaming with foam materials (in particular polyurethane) of part of the notch and/or the jamb or leaf is required: the fact that the hinge presents an open structure does not guarantee that the movement components of the hinge same (arms, adjustment means, etc.) are safeguarded from being invaded by the foaming material, with consequent degradation of their functionality. To eliminate the latter drawback, hinges are known wherein a plastic casing (generally obtained by molding) is added to the supporting structure, realized in the above manner, to the purpose of protection and aesthetic improvement. While partially solving the inconvenience, this solution requires the use of a further processing and a specially made component of a different material.

In general, then, the arms that make up the articulation device have complex three-dimensional shapes that are also made by a metallic material injection molding, with all the problems described above. Where one partially abandons the complexity of the shape of the arms, and realizes the same as packs of stacked metal flat sheets, one is left however with the disadvantage of having to use a large amount of material in an aesthetically poorly appreciable configuration.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein at least one of the main components presents a structure that is simply obtained with a material having high mechanical performance and obtaining a considerable saving of the same material.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein at least the support structure is configured so as to be simply obtained with a material having high mechanical performance and obtaining a considerable saving of the same material.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein at least a movable body and/or a movable insert is configured to be simply obtained with a material having high mechanical performance and obtaining a considerable saving of the same material.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein at least the structure of a movable insert and/or of a movable body is configured in such a way as to make possible to simply realize in it a seat for the insertion of a head of an adjusting actuator, the movable insert and/or the movable body and said seat being obtained with a material having high mechanical performance, at the same time realizing a considerable saving of same material.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein at least a part of the articulation device is configured so as to be simply obtained with a material having high mechanical performance and obtaining a considerable saving of the same material.

One object of the present invention is to obviate the above drawbacks, by providing an invisible hidden hinge for doors, which is structurally perfected and wherein all major components of the hinge are configured so as to be simply obtained with a material having high mechanical performance and obtaining a considerable saving of the same material.

These aims and others besides, which will better emerge in the description that follows, are achieved, in accordance with the present invention, by a hidden hinge for doors, which is structurally perfected and has structural and functional characteristics in accordance with the attached independent claims, further embodiments being identified in the appended and corresponding dependent claims.

The invention is described more in detail hereinafter with the aid of the drawings, which represent an embodiment provided purely by way of non-limiting example. - Figure 1 shows: in (a) a perspective view of a hinge according to the invention in a first variation, and in (b) the same with the cover plates applied on the end portions for aesthetic purposes. The hinge is shown in a condition of complete opening.

- Figure 2 shows a second variation of the hinge in a view similar to that of Figure 1 (a). The hinge is shown in a condition of complete opening.

- Figure 3 is an exploded view of the hinge according to Figures 1 (a) and 1(b). In Figure 3, an exploded view of a first connecting body variation of a hinge according to the invention is also indicated with "(a)", said variation being that which differentiates the variation of the hinge of Figure 2 by hinge variation of Figures 1 (a) and 1 (b).

- Figure 4 shows a first variation of a support structure for the first body of the hinge connection according to the invention, in particular for the hinge of Figure 1 (a): in forefront view (detail (a)), in longitudinal section in the plane A-A of Figure 4 (a) (detail (b)), in front perspective view (detail (c)), in a rear perspective view (detail (d)).

- Figure 5 shows a second variation of a support structure for the first connecting body of the hinge according to the invention, in particular for the hinge of Figure 2: in forefront view (detail (a)), in longitudinal section in the plane A'-A of Figure 5 (a) (detail (b)), in front perspective view (detail (c)), in a rear perspective view (detail (d)).

- Figure 6 illustrates a support structure for the second connecting body of the hinge according to the invention, in particular: in forefront view (detail (a)), in longitudinal section in the plane B-B of Figure 6(a) (detail (b)), in front perspective view (detail (c)), in a rear perspective view (detail (d)).

- Figure 7 shows a first variation of a first movable body of the first connectin g body of the hinge according to the invention, in particular for the hinge of Figure 1 (a): in forefront view (detail (a)), top plan (detail (b)), bottom plan (detail (c)), in front perspective view (detail (d)), in rear perspective view (detail (s)) and in front rotated perspective view (detail (f)).

- Figure 8 shows a second variation of a first movable body of the first connecting body of the hinge according to the invention, in particular for the hinge of Figure 2: in forefront view (detail (a)), in top plan (detail (b)), in bottom plan (the detail (c)), in front perspective view (detail (d)), in a rear perspective view (detail (s)) and in front view in perspective rotated (detail (f)).

- Figure 9 shows a first movable body of the second connecting body of the hinge according to the invention: in front front view (detail (a)), in top plan (detail (b)), in bottom plan view (the detail (c)), in front perspective view (detail (d)), in a rear perspective view (detail (s)) and in a rotated rear perspective view (detail (f)).

- Figure 10 shows a second movable body of the second connecting body of the hinge according to the invention: in front front view (detail (a)), in top plan (detail (b)), in bottom plan view (detail (c)), in front perspective view (detail (d)), in a rear perspective view (detail (s)) and in rotated front perspective view (detail (f)).

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- Figure 1 1 shows the engagement of the second movable body of Figure 10 within the first movable body of Figure 9, respectively in forefront view (detail (a)) and in section on plane C-C of Figure 11 (a) (detail (b)).

- Figure 12 illustrates a partially exploded perspective view of a variation of the system for the application of the cover plates to the outermost parts of the hinge connecting bodies according to the invention.

- Figure 13 shows an enlarged detail of Figure 7 of the first movable body: in front perspective view (detail (a)), in a rear perspective view (detail (b)), in top plan view (detail (c)).

- Figure 14 illustrates a variation of movable inserts for the hinge according to the invention, in particular a pair of said movable inserts: in front front view (detail (a)), in front perspective view (detail (b)) and in rear perspective view (detail (c).

- Figure 15 illustrates a first arm of the articulation device of the hinge according to the invention: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), from above (detail (d)), in longitudinal section along the plane indicated by D-D in figure 15 (d) (detail (s)), in cross-section in the plane indicated with D'- D' in figure 15(c) (detail (f)).

- Figure 16 illustrates a variation of the first arm of the articulation device of the hinge of Figure 15: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), in top plan view (detail (d)), in longitudinal section view along the plane indicated with D"-D" in Figure 16 (d) (detail (s)), in cross-section on the plane indicated by D ^, "-D'" in Figure 16 (c) (detail (f)).

- Figure 17 illustrates a second arm of the articulation device of the hinge according to the invention: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), from above (detail (d)), in longitudinal section along the plane indicated with E-E in Figure 17(d) (detail (s)), in cross-section on the plane indicated with E"-E" in Figure 17 (c) (detail (f)), in cross-section on the indicated with E'-E' in Figure 17 (c) (detail (g)).

- Figure 18 illustrates a variation of the second arm of the articulation device of the hinge of Figure 17: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), in top plan view (detail (d)), in longitudinal section along the plane indicated with E"'-E'" in Figure 18 (d) (detail (s)), in cross-section on the plane indicated with E ^v -E ^v in Figure 18 (c) (detail (f)), in cross-section on the plane indicated with E ^IV -E ^IV on Figure 18 (c) (detail (g)).

- Figure 19 illustrates a first connecting rod of the articulation device of the hinge according to the invention: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), in a top plan view (detail (d)), in longitudinal section along the plane indicated with F-F in Figure 19(d) (detail (s)), in cross-section on the plane indicated with F'-F' in Figure 19 (c) (detail (f)), in cross-section on the plane indicated with F"-F" in Figure 19(c) (detail (g)).

- Figure 20 illustrates a variation of the first connecting rod of the articulation device of the hinge of Figure 19: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), in top plan view (detail (d)), in longitudinal section along the plane indicated by F'"- F'" in figure 20 (d) (detail (s)), in cross-section in the plane indicated with F ^I -F ^IV in Figure 20 (c) (detail (f)), in cross-section in the plane indicated with F ^v -F ^v in Figure 20 (c) (detail (g)).

- Figure 21 illustrates a second connecting rod of the articulation device of the hinge according to the invention: in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), from above (detail (d)), in longitudinal section along the plane indicated by D-D in figure 21 (d) (detail (s)), in cross-section on the plane indicated with G'-G' in figure 21 (c) (detail (f)).

- Figure 22 illustrates a variation of the second connecting rod of the articulation device of the hinge of Figure 21 : in a perspective front view (detail (a)), in a rear perspective view (detail (b)), in a rear view (detail (c)), in top plan view (detail (d)), in longitudinal section along the plane indicated with G"-G" in Figure 22 (d) (detail (s)), in cross-section on the plane indicated with G'-G'" in Figure 22 (c) (detail (f)).

- Figures from 23 to 28 describe hinge assembling steps according to the invention in the variation of Figure 1 (a), in particular: in Figures 23(a) and 23(b), the introduction of sliding bushes at the ends of the first and second rod and, respectively, the first and second arm of the articulation device; in Figure 24(a) the assembling of the device and its mounting, using the relevant pins, on the first movable body of the first connecting body and the second movable body of the second connecting body and in Figure 24(b) the relevant final result in top plan view; in Figure 25(a), 25(b) the insertion of the second movable body of the second connecting body inside the first movable body of the second connecting body; in figure 26 (a) and 26 (b) assembling the of the eccentrics of position adjustment according of the position of the second connecting body with respect to the first movable body of the second connection body; in Figure 27(a) the inclusion of the group formed by the first and second movable body of the second connection body within their support structure; in Figure 27(a) and (b) the assembling of the eccentrics of position adjustment of the first movable body of the second connection body wit respect to the relevant support structure; always in Figure 27(a) and (b) the assembling of the first movable body of the first connecting body in the relevant support structure.

- Figure 29 illustrates the similar assembling steps of Figure 28, with reference to the variation of the hinge of Figure 2, specifically: Figure 29(a) shows two assembling steps, on the support structure of the first connecting body, of one variation of the actuator of position adjustment of the first movable body with respect to the relevant support structure.

In the attached figures, the reference number 1 generally indicates a hinge according to the invention. The hinge 1 generally comprises: a first connecting body 2a intended to be inserted inside a respective housing cavity formed in the jamb or in the leaf of the door; a second connecting body 2b intended to be inserted inside a respective housing cavity made in the door or into the door jamb; an articulation device 3 that connects the first 2a and the second 2b connecting body to each other, allowing the relative movement between a closed condition, corresponding to closure of the door, and a condition of complete opening, corresponding to the complete opening of the door. The first connecting body 2a develops: in depth along a first direction X1 in the space coinciding with the direction of insertion in the respective housing cavity in the door jamb or in the door leaf; in width along a second direction Y1 in space perpendicular to the first direction X1 ; in length along a third direction Z1 in the space perpendicular to both the first X1 and the second direction Y1. The second connecting body 2b develops: in depth along a fourth direction X2 in space coincident with the direction of insertion in the respective housing cavity in the door jamb or leaf; in width along a fifth Y2 direction in space perpendicular to the fourth direction X2; in length along a sixth Z2 direction in space perpendicular to both the fourth X2 and the fifth Y2 direction. The first direction X1 is then the direction of the depth X1 of the first connecting body 2a, while the fourth direction X2 is the direction of the depth in the second connecting body 2b; the second direction Y1 is the direction of the width of the first connecting body 2a, while the fifth Y2 direction is the direction of the width of the second connecting body 2b; the third direction Z1 is the length direction of the first connecting body 2a, while the sixth direction Z2 is the length direction of the second connecting body 2b. The two cartesian terns (X1 , Y1 , Z1) and (X2, Y2, Z2) so defined are shown for illustrative purposes in Figures 1(a), 3, 4(c), 4(d), 5(c), 5(d), 6(c), 6(d), 7(d), 7(e), 8(d), 8(e), 9(d), 9(e), 10(d), 10(e), 12, 13(b), 14(b), 14(c).

In the condition of closing, the first 2a and the second 2b connecting body define, in mutual combination, a seat in which the articulation device 3 is enclosed. The first 2a and the second 2b connecting body have two sides 21a, 22a; 21 b, 22b opposed to each other with respect to a plane defined by the direction of the depth X1 , X2 and by the direction of the length Z1 , Z2. Betwenn said two sides 21a, 22a; 21 b, 22b, the inner one 21a, 21 b is the side that, in the movement of opening- closing of the hinge 1 , travels a shorter path, the outer one being the other 22a, 22b.

The first 2a or the second 2b connecting body comprises a supporting structure 4a, 4b. Preferably, as illustrated in the figures, both the first 2a and the second 2b connecting body comprises a respective supporting structure 4a, 4b.

The support structure 4a, 4b, in turn, comprises a central part 40a, 40b and two end parts 41a, 4 b, placed on opposite sides of the central part 40a, 40b along the direction of length Z1 , Z2 of the respective second connecting body 2a, 2b. The central part 40a, 40b is intended to house part of the articulation device 3. This can be done directly or, as will also be seen in the following (and as, in particular and preferably, illustrated in the attached figures), by means of the intermediate bodies. The two end parts 41a, 41b are intended to interact with and/or house fixing means for fixing the connection body 2a, 2b to the jamb or leaf.

According to a first inventive solution, in particular illustrated in Figures 4 to 6, the support structure 4a, 4b is shaped from a single metal sheet in a single concave piece having concavity facing in a direction opposite to the direction of the depth X1 , X2 of the connecting body 2a, 2b and defined by a bottom 42a, 42b of the support structure 4a, 4b and by side walls 43a, 43b of the support structure 4a, 4b that realize a peripheral continuous edge of the bottom 42a, 42b, united to the bottom 42a, 42b without solution of continuity of the material of which said single metallic sheet is made and completely surrounding the bottom 42a, 42b in accordance with a curve closed around the direction of the depth X1 , X2 of the connecting body 2a, 2b. Being substantially box-shaped, consisting of a single shaped metal sheet that realizes simultaneously both the bottom 42a, 42b and the relevant side walls 43a, 43b (that enclose the bottom 42a, 42b on all sides both in the central part 40a, 40b and in the end parts 41a, 41b seamlessly), the support structure 4a, 4b has a shape that is able to withstand mechanical stresses in a highly efficient manner and can therefore be realized with a sheet material, for example steel, which has a thickness that, with equal mechanical properties, is considerably less than that of the known hinges, thus obtaining a considerable saving of material and costs. Furthermore, the substantial box shape of support structure 4a, 4b protects the hinge in case of need for foaming of the housing cavity with polyurethane foam or similar material. The so configured support structure 4a, 4b can be obtained by the drawing/deep drawing technique according to industry practices. The side walls 43a, 43b can have a height from the bottom 42a, 42b that is not uniform and/or varied as a function of the requirements (in particular to allow the housing and/pr the passage of other parts of the hinge 1 , for example of portions the articulation device 3). The continuity between the side walls 43a, 43b and the bottom 42a, 42b of the support structure 4a, 4b does not imply the complete absence of apertures. Without substantially adversely affecting the mechanical seal of the support structure 4a, 4b, openings can locally be provided at the junction between the bottom 42a, 42b and the peripheral edge of the same, or in other parts of the support structure 4a, 4b. Specifically, in the junction area between its bottom 42a, 42b and their side walls 43a, 43b and/or on its bottom 42a, 42b and/or on its side walls 43a, 43b, the support structure 4a, 4b provides for one or more localized through openings 44a, 44b made for the purpose of lightening the structure and/or for functional service. In particular, in correspondence of at least one of said one or more localized through openings 44a, 44b, the bottom 42a, 42b is folded to form a sleeve 45a, 45b which at least partially surrounds said at least one of said one or more localized through openings 44a, 44b and extends away from the bottom 42a, 42b for a predetermined distance towards the inside or towards the outside of the concavity of the support structure 4a, 4b. As it will be seen also in the following, these through openings 44a, 44b can be used for the engagement of clamping screws or of position adjustment means. In the case in which the sleeve 45a, 45b is present, the latter (optionally threaded) can serve as a guide for the screws and/or for the adjustment means. In some cases, the through- opening 42a, 42b cannot have a direct functional connotation and the sleeve 45a, 45b created around it can be used as guide element. The through openings can be obtained by drilling the single metallic sheet, from which the support structure is shaped. The relevant sleeves can also be obtained in the course of drawing operations.

As illustrated in the figures, the bottom 42a, 42b of the support structure 4a, 4b is shaped and comprises, along the direction of length Z1 , Z2 of the connecting body 2a, 2b, a plurality of floor portions 420a, 420b, each of which develops primarily in a respective plane parallel to the direction of the length Z1 , Z2 and to the width direction Y1 , Y2 of the connecting body 2a, 2b. The bottom 42a, 42b of the support structure 4a, 4b also comprises one or more transverse portions 421a, 421 b each of which is mainly developed in a respective plane parallel to the depth direction of the X1 , X2 and connects, without solutions of continuity in the material constituting said single metal sheet, two neighboring and different floor portions 420a, 420b to each other. In correspondence of said transverse portions 421a, 421 b, the perimetric edge created by the side walls 43a, 43b is joined with said transverse portions 421a, 421 B without solution of continuity in the material forming said single metallic sheet. In particular, preferably, as illustrated in the figures, at least one or more of the one or more transverse portions 421a, 421 b of the bottom 42a, 42b of the support structure 4a, 4b extends mainly in a respective plane parallel to both the direction of the depth X1 , X2 and the direction of width Y1 , Y2.

The support structure 4a, 4b, shaped from a single metal sheet may then comprise areas of different depths for the housing of other components of the hinge 1 , or for other purposes. The central part 40a, 40b of the support structure 4a, 4b may comprise one or more of the floor portions 420a, 420b of the bottom 42a, 42b, each located at one of its own predetermined depth along the direction of the depth X1 , X2 of the connecting body 2a, 2b. The end parts 41a, 41 b of the support structure 4a, 4b may comprise, in turn, one or more of the portions of the floor 420a, 420b of the bottom 42a, 42b, each located at one of its own predetermined depth along the direction of depth X1 , X2 of the connecting body 2a, 2b, preferably smaller than that of the floor portions 420a, 420b of the central part 40a, 40b. This type of structure can allow the housing to further parts of the hinge 1 in the central part 40a, 40b of the support structure 4a, 4b, in particular the housing of at least part of the articulation device 1 , maintaining the overall dimensions of the hinge 1 in the direction of depth X1 , X2 of the connecting body 2a, 2b as limited. Preferably, the end parts 41a, 41 b of the support structure 4a, 4b each comprise a respective portion 410a, 410b distal from the central part 40a, 40b and a respective portion 41 1a, 41 1b proximal to the central part 40a, 40b. The proximal portion 411a, 411 b includes one or more of the floor portions 420a, 420b of the bottom 42a, 42b, each located at one of its own predetermined depth along the direction of the depth X1 , X2 of the connecting body 2a, 2b that is smaller than that of the floor portions 420a, 420b of the central part 40a, 40b. The distal portion 410a, 410b, in turn, comprises one or more of the portions of the floor 420a, 420b of the bottom 42a, 42b, each located at one of its own predetermined depth along the direction of the depth X1 , X2 of the connecting body 2a, 2b that it is smaller than that of the floor portions 420a, 420b of the proximal portion 411a, 411b. In this way, there is a structure wherein the various portions of the support structure 4a, 4b, all molded from the same single metal sheet, are concave, the end parts 41a, 41 b thus presenting cavities for the housing of other parts of the hinge 1. Such a structure is always all obtainable, by deep drawing, from the single metallic sheet which is shaped by the support structure 4a, 4b. In Figures 4, 5, 6 a special case of this structure is illustrated, in which, both in the central part 40a, 40b and in the distal portions 410a, 41 1a and proximal 41 1a, 411 b of the support structure 4a, 4b, the bottom 42a, 42b presents a unique, respective floor portion 420a, 420b and the only respective transverse portions 411a, 411b needed to delimit and connect said floor portions 420a, 420b to each other. Preferably, the fastening means for fastening the connecting body 2a, 2b (in particular to the jamb, or to the door) are housed in the end parts 41a, 41 b, preferably in a portion 410a, 410b of the end parts 41a, 41 b which is distal from the central part 40a, 40b (in particular, specifically, in the concave one as described and illustrated above, among other, in the figures from 4 to 6). Advantageously, in one embodiment of the invention illustrated in particular in Figure 12, the fastening means for fastening the connecting body 2a, 2b (in particular to the jamb or the door) comprise, for each end portion 41a, 41 b, a spacer insert 202 insertable into a cavity of the end portion 41a, 41 b, (preferably in the distal portion 410a, 410b). The insert spacer 202 has a through hole 203 (preferably with inlet opening having flared walls) which, when the insert spacer 202 is housed in the end part 41a, 41 b, is placed in correspondence with a through hole 200 made on the bottom 42a, 42b of the support structure 4a, 4b. The fixing means fro fixing the connecting body 2a, 2b further comprise a fixing screw 201 inserted simultaneously into the through hole 203 of the insert spacer 202 and into the through hole 200 of the bottom 42a, 42b, for fixing the connecting body 2a, 2b to the relative jamb or door. The spacer insert 202 is provided with an auxiliary hole 204 for insertion of a locking screw 205 for a flange 206 for covering the end portion 41a, 41 b of the support structure 4a, 4b. The spacer insert 202 is shaped as a single concave body by a respective additional single metal sheet and inserted in the end portion 41a, 41 b of the support structure 4a, 4b with the concavity facing in the direction of depth X1 , X2 of the second connecting body 2a, 2b (figure 12).

All of the above described about the support structure 4a, 4b can be realized only in one of the two connecting bodies 2a, 2b or in both.

The first 2a and/or second 2b connecting body further comprises one or more movable inserts accommodated in the support structure 4a, 4b, which are movable with respect to the latter for adjusting the position of the hinge 1 , and are intended to engage, directly or indirectly, part of the articulation device 3. Said movable inserts may be positioned in both the connecting bodies 2a, 2b (in particular in the relative support structure 4a, 4b) or only in one of them. Preferably, each of said one or more movable inserts is shaped from a respective single metal sheet, as it will be described in detail below. Said movable inserts may also be accommodated in one or more intermediate bodies inserted, in turn, in the support structure 4a, 4b. These intermediate bodies can be, for example, movable bodies such as it will be described below. Said movable inserts can themselves coincide with one or more movable bodies, as again described hereinafter.

The first 2a and/or second 2b connecting body (preferably both, as will also be described later) includes at least one movable insert 5a, 5b. Said at least one movable insert 5a, 5b preferably and advantageously is shaped from a respective single metal sheet in one piece comprising a portion 500a, 500b transverse to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. Said transverse portion 500a, 500b, by a right side 501a, 501 b facing in the opposite direction with respect to the direction of the depth X1 , X2 of the connecting body 2a, 2b, extends without solution of continuity in the material forming the single metal sheet from which said at least one movable insert 5a, 5b is shaped and folds back around an axis parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, into flat flange portions 533, 533'. Said flat flange portions 533, 533' lie parallel to a plane defined by a direction parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b by a direction parallel to the length direction of Z1 , Z2 of the connecting body 2a, 2b. In said flat flange portions 533, 533', an adjustment member 7, 8 is operatively engaged for the adjustment of the position of said at least one movable insert 5a, 5b with respect to the support structure 4a, 4b. In its simplest form, the movable insert 5a, 5b may be realized by simple blanking and bending of a metal sheet in a simple "L" structure, one of the relevant appendages realizing a portion of the flat flange 533, 533'; or it can be realized by simple bending and punching of a metal sheet in a simple "U"-shaped structure with opposite appendices which realize each a corresponding portion of the flat flange. In this simple capacity, however, a high thickness of the metal sheet is required to ensure an adequate mechanical strength. According to the invention, preferably, said at least one movable insert 5a, 5b is shaped from a respective single metal sheet in a single piece having concave concavity defined by a bottom 52a, 52b of the at least one movable insert 5a, 5b and by side walls 53a, 53b of the at least one movable insert 5a, 5b, that are raised from the bottom 52a, 52b in the opposite direction to that of the depth X1 , X2 of the connecting body 2a, 2b and develop mainly parallel to said direction of depth X1 , X2 realizing a peripheral edge of the bottom 52a, 52b that is continuous and joined to the bottom 52a, 52b without solution of continuity of the material of which said respective single metal sheet is made and surrounding the bottom 52a, 52b on at least two consecutive sides according to a curve that develops around the direction of depth X1 , X2 of the connecting body 2a, 2b. Of said at least two consecutive sides, the first (indicated by I in Figure 14(c)) is parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, the second (indicated II in Figure 14 (c)) is parallel to the direction of the length Z1 , Z2 of the second connecting body 2b. The first I and second II consecutive sides according to above are to be understood in a purely geometrical way, simply to indicate from which side around the direction of depth X1 , X2 the corresponding portion of the curve defined by the perimeter edge develops. Obviously, said curve can be a more or less complete arc of a circle or any other appropriate geometric curve (elliptical arc, parabolic or generally curved, a portion of straight line, broken line, etc., or any suitable combination thereof). In the examples illustrated by way of example, but not by way of limitation, in the figures, the side walls forming the perimeter edge are represented as elements substantially flat with curved fittings, more or less pronounced, to the other movable insert portions 5a, 5b. The side wall 53a, 53b corresponding to the first side I coincides with said portion 500a, 500b transverse to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. In this way, the movable insert 5a, 5b has a box structure that allows its realization by deep drawing of a metal sheet of reduced thickness, with saving of material and costs. As shown in particular in Figure 14, the movable insert 5a may have a substantially "L"-shaped structure and therefore include only a single portion of the flat flange 533. In the event that it presents a concave structure as shown in Figure 14 and described above, the peripheral edge of its bottom 52a surrounds the latter only on two consecutive sides (the first I and the second II), so as to easily allow (where appropriate) the direct engagement of the articulation device 3 (indicated schematically in dashed lines in figure 14(a)) on the movable insert 5a. This condition is illustrated in Figure 14 with reference to the movable inserts 5a of the first connecting body 2a, but it is understood that a similar configuration may also be realized for movable inserts 5b of the second connecting body 2b. Preferably, the hinge 1 comprises a further movable insert 5a, 5b identical and symmetrical to said at least one movable insert 5a, 5b with respect to a median plane of the ^' connecting body 2a, 2b parallel to both the width direction Y1 , Y2 and the direction of depth X1 , X2 of the connecting body 2a, 2b. This condition is illustrated in Figure 14 with reference to the movable inserts 5a of the first connecting body 2a, but it is understood that a similar configuration may also be realized for movable inserts 5b of the second connecting body 2b. The hinge 1 preferably also comprises a further adjustment member 7, 8 of said further movable insert position 5a, 5b with respect to the support structure 4a, 4b, operatively engaged in said further movable insert 5a, 5b. Advantageously, said at least one movable insert 5a, 5b and said further movable insert 5a, 5b are made integral with each other from the side of the articulation device 3 housed in the connecting body 2a, 2b (as illustrated in dashed lines in Figure 14(a) fro the first connecting body 2a, representation that is meant to be extendable, with respect to this feature, also to the second connecting body 2b). In particular, preferably, said at least one movable insert 5a, 5b and said further movable insert 5a, 5b are made integral with each other by/at at least a fixed axis of rotation 31a, 31 b of the articulation device 3. Alternatively to the configuration of the two separate symmetrical movable inserts (preferably maintained as integral by the engagement with the articulation device 3) the at least one movable insert 5a, 5b can be at least a movable body 5a, 5b as described below (or, depending on the requirements, it is inserted in at least one movable body 5a, 5b, 6b as described below).

Specifically, at least one movable insert 5a, 5b has at least one movable body 5a, 5b shaped starting from a respective single metal sheet in a single piece having concave concavity defined by a bottom 52a, 52b of said at least one movable body 5a, 5b and by side walls 53a, 53b of said at least one movable body 5a, 5b that are raised from the bottom 52a, 52b in the opposite direction to that of the depth X1 , X2 of the connecting body 2a, 2b and predominantly extend parallel to said direction of depth X1 , X2, realizing a peripheral edge of the bottom 52a, 52b that is continuous and joined to the bottom 52a, 52b without solution of continuity of the material of which said respective single metal sheet is made and surrounding the bottom 52a, 52b on at least three consecutive sides according to a curve that is spread around the direction of depth X1 , X2 of the connecting body 2a, 2b. With reference, in particular, to Figures 7 to 9, of said at least three consecutive sides, the first I and third III are parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, the second II being parallel to the direction of length Z1 , Z2 of the connecting body 2a, 2b. Also in this case, the consecutive sides of the above mentioned first I, second II and third III are understood in a purely geometrical way, simply to indicate on which side around the direction of depth X1 , X2 the corresponding portion of the curve defined by the peripheral edge develops. Obviously, said curve can be a more or less complete arc of a circle or any other appropriate geometric curve (elliptical arc, parabolic or generally curved, a portion of straight line, broken line, etc., or any suitable combination thereof). In the examples illustrated by way of example, but not by way of limitation, in the figures the side walls forming the perimeter edge are represented as elements substantially flat with more or less pronounced curved fittings to the other portions of said at least one movable body 5a, 5b. The side wall 53a, 53b corresponding to the first side I coincides with said portion 500a, 500b transverse to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. In particular, also in this case, said transverse portion 500a, 500b, by a own side 501a, 501b facing in the opposite direction with respect to the depth direction X1 , X2 of the connecting body 2a, 2b, extends without solution of continuity in the material constituting the single metal sheet from which said at least one movable insert 5a, 5b (which realizes said at least one movable body 5a, 5b) is shaped and folds back around an axis parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, into the flat flange portions 533, 533'. Said flat flange portions 533, 533' lie parallel to a plane defined by a direction parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b and from a direction parallel to the length direction of Z1 , Z2 of the connecting body 2a, 2b. To said flat flange portions 533, 533' an adjustment member 7, 8, for the adjustment of the position of said at least one movable insert 5a, 5b (which realizes said at least one movable body 5a, 5b) with respect to the support structure 4a, 4b, is operatively engaged.

As illustrated in the figures 7 to 9, preferably the side wall 53a, 53b corresponding to the third side III realizes a further portion 500a, 500b transverse to the direction of the length Z1 , Z2 of the connecting body 2a, 2b identical to that realized by the side wall 53a, 53b corresponding to the first side I and symmetrical to it with respect to a median plane of the connecting body 2a, 2b parallel to both the width direction Y1 , Y2 and the direction of the depth X1 , X2 of the connecting body 2a, 2b. Specifically, also this further transverse portion 500a, 500b, on a own right side 501a, 501b facing in the opposite direction with respect to the direction of the depth X1 , X2 of the connecting body 2a, 2b, is extended, without solution of continuity, in the material forming the single metal sheet from which said at least one movable insert 5a, 5b (which realizes said at least one movable body 5a, 5b) is shaped and folds back around an axis parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, in additional, respective portions of the flat flange 533, 533' which lie parallel to a plane defined by a direction parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b and from a direction parallel to the direction of the length Z1 , 72 of the the connecting body 2a, 2b. To said further respective flat flange portions 533, 533', a further adjustment member 7, 8, for the adjustment of the position of said at least one movable insert 5a, 5b with respect to the support structure 4a, 4b, is operatively engaged.

In one form of the invention (see in particular the figures different from Figure 14) and both in the presence and absence of one or more of the movable inserts described above (which may or may not be used depending on the needs, and which may coincide or less with the at least one movable body as described above), the first 2a and/or second 2b connecting body comprises a first movable body 5a, 5b housed in the support structure 4a, 4b movable with respect to the latter for an adjustment of position of the hinge 1 and is intended to house part of the articulation device 3, the support structure 4a, 4b thus realizing a housing structure for housing the first movable body 5a, 5b. Said first movable body 5a, 5b (see in particular Figures 7, 8, 9) is shaped from a respective single metal sheet in a single piece having concave concavity defined by a bottom 52a, 52b of the first movable body 5a, 5b and by side walls 53a, 53b of the first movable body 5a, 5b that are raised from the bottom 52a, 52b in the direction opposite to that of the depth X1 , X2 of the connecting body 2a, 2b and develop mainly parallel to said direction of depth X1 , X2 realizing a peripheral edge of the bottom 52a, 52b that is continuous and joined to the bottom 52a, 52b without solution of continuity of the material of which said respective single metal sheet is made and surrounding the bottom 52a, 52b on at least three consecutive sides according to a curve that develops around the direction of depth X1 , X2 of the connecting body 2a, 2b. Of said at least three consecutive sides, the first I and third III are parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, while the second II is parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b.

Also in this case, the first I, second II and third III consecutive sides above are understood in a purely geometrical way, simply to indicate which side around the direction of depth X1 , X2 the corresponding portion of the curve defined by the peripheral edge develops. Obviously, said curve can be a more or less complete arc of a circle or any other appropriate geometric curve (elliptical arc, parabolic or generally curved, a portion of straight line, broken line, etc., or any suitable combination thereof). In the examples illustrated by way of example, but not by way of limitation, in the figures the side walls forming the perimeter edge are represented as elements substantially flat with more or less pronounced curved fittings to the other portions of the first movable body 5a, 5b.

The first 2a and/or second 2b connecting body further comprises a second movable body. In the figures, said second movable body is indicated as 6b and illustrated only in the second connecting body 2b. In general, however, the hinge 1 according to the invention may provide a nested structure with such a second movable body even on the first connecting body 2a, depending on the requirements. Therefore, and unless explicitly mention, in the following, on the first connecting body 2a, the presence of a second movable body 6b with similar characteristics will also be deemed possible. The second 6b movable body is housed in the first 5b movable body, movable with respect to the latter for a further adjustment of the position of the hinge 1 and is intended to house part of the articulation device 3. The first movable body 5b thus realizes a housing structure for the second movable body 6b. Said second 6b movable body is shaped from a respective single metal sheet in a single piece having concave concavity defined by a bottom 62b of the second movable body 6b and by side walls 63b of the second movable body 6b which rise from the bottom 62b in the direction opposite to that of the depth X2 of the connecting body 2b and develop mainly parallel to said direction of depth X2 by providing a continuous peripheral edge of the bottom 62b, 62b joined to the bottom without solution of continuity of the material of which said respective single metal sheet consists of and surrounding the bottom 62b on at least three consecutive sides according to a curve that is spread around the direction of depth X2 of the connecting body 2b. Of said at least three consecutive sides, the first Γ and the third III' are parallel to the direction of the width Y2 of the connecting body 2b, the second ΙΓ is parallel to the direction of the length Z2 of the connecting body 2b.

The first 2a and/or second 2b connection body may comprise a plurality of second movable bodies 6b housed in one another, each movable with respect to each other and with respect to the first movable body 5b for a respective further adjustment of the hinge position 1. The first movable body 5b thus realizes a housing structure for the first seconds of the movable bodies 6b of said plurality and each second movable body 6b, in turn, thus realizes a respective housing structure for the second movable body 6b housed therein. Although illustrated in the figures is the presence of only one second movable body 6b, it is evident how they can be provided with one or more other, inserted into each other to form a corresponding nested structure. Each of said second movable bodies 6b is shaped from a respective single metal sheet in a single piece having concave concavity defined by a respective bottom 62b and 63b by respective side walls that rise from the bottom 62b in the opposite direction to that of X2 depth of 2b and develop mainly parallel to said direction of depth X2 connecting body providing a continuous peripheral edge of the bottom 62b, 62b joined to the bottom without solution of continuity of the material of which consists of said respective single metal sheet 62b and surrounding the bottom of at least three consecutive sides according to a curve that is developed around the X2 direction of the depth of the connecting body 2b. Of said at least three consecutive sides, of the first Γ and the third III' are parallel to the direction of the width Y2 of the connecting body 2b, the second ΙΓ being parallel to the direction of the length Z2 of the connecting body 2b.

Also in this case, relatively to the second movable body 6b (or any of second movable bodies 6b of the respective plurality of second movable bodies 6b), the consecutive sides first Γ, second, ΙΓ and third III' mentioned above are intended in a purely geometrical way, simply to indicate on which side around the direction of depth X2 the corresponding portion of the curve defined by the perimeter edge develops. Obviously, said curve can be a more or less complete arc of a circle or any other appropriate geometric curve (elliptical arc, parabolic or generally curved, a portion of straight line, broken line, etc., or any suitable combination thereof). In the examples illustrated by way of example, but not by way of limitation, in the figures the side walls forming the perimeter edge are represented as elements substantially flat with more or less pronounced curved fittings to the other portions of the second movable body 6b.

Being substantially box-shaped, consisting of a single shaped metal sheet that realizes simultaneously both the bottom 52a, 52b, 62b and the relative side walls 53a, 53b, 63b (which enclose seamlessly the bottom 52a, 52b, 63b on at least three consecutive sides, one of which is parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b), a movable body 5a, 5b, 6b as described above (also the at least one movable body which can realize one of the above described movable inserts) presents a shape that is able to withstand mechanical stresses in a highly efficient manner and can therefore be realized with a sheet material, for example steel, that has a thickness that, at equal mechanical properties, is considerably less than that of of the known hinges, thus obtaining a considerable saving of material and costs. A so configured movable body 5a, 5b, 6b can be achieved by deep drawing technique (also known as "drawing", or "deep drawing") according to industry practices. The side walls 53a, 53b, 63b can have a height from the bottom 52a, 52b, 62b not uniform and/or varied as a function of the requirements (in particular to allow the housing and/or the passage of other parts of the hinge 1 , for example of portions of the articulation device 3). The continuity between the side walls 53a, 53b, 63b and the bottom 52a, 52b, 63b of the movable body 5a, 5b, 6b does not imply the complete absence of apertures. Without substantially adversely affecting the mechanical seal of the movable body 5a, 5b, 6b openings can be locally provided at the junction between the bottom 52a, 52b, 62b and the peripheral edge of the same, or in other parts of the movable body 5a, 5b, 6b. Specifically, in the junction area between its own bottom 52a, 52b, 62b and their side walls 53a, 53b, 63b and/or on its bottom 52a, 52b, 62b and/or on its own side walls 53a, 53b, 63b the movable body 5a, 5b, 6b provides for one or more localized through openings realized for the purpose of lightening the structure and/or of functional service.

In at least one of the movable bodies 5a, 5b, 6b chosen among the first movable body 5a, 5b, the second movable body 6b or the movable bodies 6b of the plurality of movable bodies (preferably more than one, and even more preferably in all movable bodies 5a, 5b, 6b), the side wall 53a, 53b, 63b corresponds to the first side I, , and the side wall 53a , 53b, 63b corresponds to the third side III, III' of the perimeter edge of the respective bottom 52a, 52b, 62b are prolonged, seamlessly, into the material constituting the only metal foil from which said at least one of the movable bodies 5a, 5b, 6b is shaped and folds back about an axis parallel to the direction of width Y1 , Y2 of the connecting body 2a, 2b into flat flange portions 533 533 633 lying in a plane defined by a direction parallel to the direction of width Y1 , Y2 of the connection body 2a, 2b and from a direction parallel to the direction of length Z1 , Z2 of the connecting body 2a, 2b. In particular, said side walls 53a, 53b, 63b corresponding to the first I, Γ and to the third side III, 111' of the peripheral edge of the respective bottom 52a, 52b, 62b each have a respective portion 500a, 500b, 600b transverse to the direction the length Z1 , Z2 of the connecting body 2a, 2b that is prolonged on a own side 501a, 501b, 601 b, facing in the opposite direction with respect to the direction of the depth Z1 , Z2 of the connecting body 2a, 2b, folding back around an axis parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, in the corresponding flat flange portions 533, 533', 633. In said portions of flat flange 533, 533', 633 corresponding adjustment actuators 7, 8 can be engaged for the adjustment of position of the hinge 1.

The configuration of the hinge 1 , if you want to realize a position adjustment (or more than one of said adjustments), may comprise one or more movable inserts (also in the form of corresponding movable bodies) and/or one or more movable bodies on a the connecting body or on the other or on both according to any combination depending on the needs.

In particular, in addition to what already said, the first 2a and/or second 2b connecting body can further comprise one or more movable inserts accommodated in the movable body 5a, 5b, 6b from a distal end of the central part 40a, 40b of the support structure 4a, 4b in the opposite direction to the direction of the depth X1 , X2 of the connecting body 2a, 2b. Said one or more movable inserts are movable with respect to said distal movable body 5a, 5b, 6b for a position adjustment of the hinge 1 , and are intended to engage, directly or indirectly, part of the articulation device 3. Preferably, also each of said one or more movable inserts is shaped from a respective single metal sheet. Preferably, also one or all of said one or more movable inserts may be made as described above, in particular as movable bodies.

In the following, unless explicitly mentioned, we will describe the characteristics common to any moving body, implying that they can be applied to movable bodies that make the movable inserts and/or to any of the movable bodies mentioned above.

Preferably, said second side II, Ι of at least one of the movable bodies 5a, 5b, 6b of the connecting body 2a, 2b (preferably two or more of them, even more, preferably all of the movable bodies 5a, 5b, 6b of the connecting body 2a, 2b) is located at the inner side 21 a, 21b of the connecting body 2a, 2b. This allows to stiffen the structure where, typically, focuses the effort by the effect of configuration change of the articulation device 3 in the passage of the hinge from the closed condition to the open condition.

Advantageously, the peripheral edge of at least one of the movable bodies 5a, 5b, 6b of the connecting body 2a, 2b (preferably two or more of them, even more preferably all) is closed around the bottom 52a, 52b, 62b of the movable body 5a, 5b, 6b itself, surrounding also on its fourth side IV, IV parallel and opposite to the second side II, II'. The height of the corresponding side wall of said fourth side IV, IV can also be very limited, depending on the needs. Also this fourth side IV, IV should be understood in the a purely geometrical way as explained above in relation to the first I, Γ, second II, II' and third III, III' side.

As already mentioned, in the junction area between its bottom 52a, 52b, 62b and its own side walls 53a, 53b, 63b and/or on its bottom 52a, 52b, 62b and/or on its side walls 53a, 53b, 63b, at least one of the movable bodies 5a, 5b, 6b of the connecting body 2a, 2b includes one or more localized through openings realized for the purpose of lightening the structure and/or functional service.

Suitably, at least one of the movable bodies 5a, 5b, 6b of the connecting body 2a, 2b (preferably two or more, even more preferably all) comprises:

- a respective central part 50a, 50b, 60b intended to house part of the articulation device 3 and inserted into a central part 40a, 40b, 50a, 50b of the respective housing structure 4a, 4b, 5a, 5b;

- two respective end parts 51a, 51 b, 61 b located on opposite sides of the central part 50a, 50b, 60b along the direction of length Z1 , Z2 of the respective connecting body 2a, 2b and coupled with one, preferably the corresponding, housing structure 4a, 4b, 5a, 5b of the two end parts 41a, 41 b, 51a, 51b of the latter, placed on opposite sides of the central part 40a, 40b, 50a, 50b along the direction of length Z1 , Z2 of the respective connecting body 2a, 2b.

The end parts 51 a, 51 b, 61 b of said at least one of the movable bodies 5a, 5b, 6b may coincide with the respective flat flange portions 533, 533', 633 described above. The end parts 51a, 51 b, 61a, 61b of said at least one of the movable bodies 5a, 5b, 6b are coupled to the housing structure 4a, 4b, 5a, 5b on portions of said two end parts 41 a, 41b, 51a, 51b of the housing structure 4a, 4b, 5a, 5b proximal to its central part 40a, 40b, 50a, 50b. In particular, preferably, this occurs for the first movable body (5a, 5b) with respect to the support structure 4a, 4b. In this case, the coupling can take advantage of the guide and/or the seats offered to the outermost parts 51a, 51 b of the first movable body 5a, 5b by the areas defined by corresponding floor portions 420a, 420b and transverse portions 421a, 421b of the bottom 42a, 42b of the support structure 4a, 4b in combination with corresponding portions of the side walls 43a, 43b of the bottom 42a, 42b of the support structure 4a, 4b.

The movable body 5a, 6b (and/or, correspondingly, the movable insert 5a, or the movable inserts 5a) most distal in the direction opposite to the direction of the depth X1 , X2 of the connecting body 2a, 2b from a bottom of the central part 40a, 40b of the support structure 4a, 4b, supports at least one fixed axis 31a, 31 b of rotation of the articulation device 3 parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. Preferably, said at least one fixed rotation axis 31a, 31 b is placed at the inner side 21a, 21b of the connecting body 2a, 2b.

On said most distal movable body 5a, 6b, at the inner side 21a, 21b of the connecting body 2a, 2b, the side walls 53a, 63b corresponding to the first

I, Γ and the third III, III' side of the peripheral edge have each a respective appendage 530a, 630b which protrudes toward the outside of the movable body 5a, 6b in the opposite direction to the direction of the depth X1 , X2 of the connecting body 2a, 2b. Said respective appendages 530a, 630b are each aligned with each other along an axis parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b and support said at least one fixed rotation axis 31a, 31 b of the articulation device 3. As also seen in Figure 14, said feature can also be found in the movable inserts 5a that are not realized as movable bodies, in particular as an extension of the transverse portion 500a.

Advantageously, in addition or alternatively, on said more distal movable body 5a, 6b, the side wall 53a, 63b corresponding to the second

II, ΙΓ side of the perimetral edge has one or more respective shaped appendages (not shown) which protrude toward the outside of the movable body 5a, 6b in the opposite direction to the direction of the depth X , X2 of the connecting body 2a, 2b, aligned with each other along an axis parallel to the direction of the length Z1 , Z2 of the connection body 2a, 2b to support and/or maintain on a guide said at least one fixed rotation axis 31a, 31b of the articulation device 3. Said shaped appendages may be shaped in the form of cylindrical portion obtained by folding the extension of the side wall 53a, 63b around an axis parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. In this case, a plurality of coaxial contoured appendages can be provided, which are distributed over the length of said side wall, or a single shaped appendage can be provided that extends for the entire length of said side wall along the direction of length Z1 , Z2 of the respective connecting body 2a, 2b. Said more distal movable body 5a, 6b supports, in particular, the portion of the articulation device 3 which is supported by the connecting body 2a, 2b.

In the hinge 1 , at least one movable body 5a, 5b, 6b is movable on a guide along the direction of the width Y1 , Y2 or along the direction of length Z1 , Z2 of the respective connecting body 2a, 2b with respect to the relevant housing structure 4a, 4b , 5a, 5b for an adjustment of position of the hinge 1 along said direction. In the attached figures, the situation is illustrated dealing with at least a movable body 5b, 6b belonging to the second 2b connecting body. However, it is noted that an analogous structure could also be realized on the first connecting body, in addition or alternatively depending on the needs. Therefore, unless there is explicit restrictive indication, although in the description that follows the reference numbers that refer to components of the second movable body 2b will be used, it is understood that the content can be applied to a similar structure made on the first connecting body 2a. Furthermore, as already said, the fact that the figures illustrate, on the first connecting body 2a, a nested structure that provides the only support structure 4a and a single connecting body 5a (or only one movable insert 5a, or only one pair of movable inserts 5a; see in particular figure 14), while on the second connecting body 2b a nested structure is illustrated that provides support structure 4b, the first movable body structure 5b and the second movable body 6b, does not exclude that the hinge according to the invention may provide, on the two connecting bodies 2a, 2b, nested structures in a different way, with a different number of elements and/or with the addition of further intermediate bodies (possibly also movable).

As it will be made explicit in the following description, even if the technical solution is specified with respect to a particular nested structure of the second 2b connecting body 2b, it will be obvious that the same solution can be applied in a different succession between the support structure and relative movable body/ies. In particular, it may be formed on a portion of the nested structure of the first movable body 2a.

As said, then, in the hinge 1 , at least one movable body 5a, 5b, 6b is movable along the guide direction of the width Y1 , Y2 or along the direction of length Z1 , Z2 of the respective connecting body 2a, 2b with respect to its structure of housing 4a, 4b, 5a, 5b for a position adjustment of the hinge 1 along said direction. In the figures, the embodiment is shown in which the at least one movable body 5a, 5b, 6b with these features is located on the second connecting body 2b. However, although not illustrated, it is also clearly possible a situation in which this structure may be realized on the first connecting body 2a, or on both. Said at least one movable body 5a, 5b, 6b which has the aforesaid feature could be the first movable body 2b of the second connecting body 5b and said relevant housing structure 4a, 4b, 5a, 5b be the housing structure of the first movable body 5b of the second connecting body 2b, in particular the support structure 4b of the second connecting body 2b. Said at least one movable body 5a, 5b, 6b could be the second movable body 6b of the second connecting body 2b, and said relevant housing structure be the housing structure 5b of the second movable body 6b of the second connecting body 2b, in particular the first movable body 5b of the second connecting body 2b. Said at least one movable body 5a, 5b, 6b could be a further second movable body 6b of the second connecting body 2b, and said relevant housing structure be the housing structure of said further second movable body 6b of the second connecting body 2b, in particular the second movable body 6b of the second connecting body 2b in which said further second movable body 6b of the second connecting body 2b is housed. Therefore, even if the following description is made in relation to the figures, with reference to the situation in which said at least one movable body 5a, 5b, 6b is the second movable body 6b of the second connecting body 2b, and said relevant housing structure 5b is the housing structure of the second movable body 6b of the second connecting body 2b, and in particular the first movable body 5b of the second connecting body 2b, its contents are identically carried forward to any of the situations described above (in which case the features described below could be correspondingly brought on and/or referred to corresponding elements in them).

With particular reference to Figures 11 (a) and 11 (b), in correspondence of the bottom 52b of said relevant housing structure 5b a seat 522 is provided for the insertion of a shaped portion 624 of the bottom 62b of said at least one movable body 6b that is housed in said relevant housing structure 5b. In said seat 522 a stroke is provided for the position adjustment of said at least one movable body 6b in its housing structure 5b along the direction of the width Y2 or along the direction of length Z2 of the respective connecting body 2b for a position adjustment of the hinge 1 in said direction. Preferably, as illustrated in the figures, said adjustment stroke is along the direction of the width Y2 with respect to the relevant housing structure 5b. Advantageously, the shaped portion 624 of the bottom 62b of said at least one movable body 6b inserted in the seat 522 completes, except for the adjustment stroke, the bottom 52b of said relevant housing structure 5b. Preferably, the thickness of the one metallic sheet from which of the housing structure 5b is shaped, that presents the seat 520 on its bottom 52b, is substantially equal to the thickness of the one metallic sheet from which the movable body 6b housed in said housing structure 5b is is shaped. Preferably, said relevant housing structure 5b presents, on its bottom 52b, a through opening that realizes said seat 522, enclosed on its four sides by a continuous frame 523 (Figure 9(a)) belonging to said own bottom 52b. Through the opening of the seat 522, the shaped portion 624 of the bottom 62b is inserted, which is the bottom of said at least one movable body 6b which is housed in said relevant housing structure 5b. Between said shaped portion 642 and said frame 523 the stroke is defined for the position adjustment of said at least one movable body 6b in its housing structure 5b along the direction of the width Y2 or along the direction of the length Z2 of the respective connecting body 2b with respect to the relevant housing structure 5b for an adjustment of position of the hinge 1 along said direction. Preferably, as illustrated in the figures, the adjustment stroke is defined along the direction of the width Y2. Advantageously, the hinge 1 comprises coupling means 55, 65 of said at least one movable body 6b with said relevant housing structure 5b, placed between the outer side 22b of the respective connecting body 2b (illustrated schematically in dashed lines in Figure 1 1 (a)) and a center-line plane of the same connecting body 2b as defined by a direction parallel to the direction of depth X2 of the connecting body 2b and a direction parallel to the direction of length Z2 of the connecting body 2b. The hinge 1 further comprises elements 56, 66 of interference against the rotation of said at least one movable body 6b around an axis parallel to the direction of the length Z2 of the connecting body 2b and passing through said coupling means 55, 65. Said interference elements 56, 66 are preferably placed on the opposite side of the coupling means 55, 65 with respect to said center- line plane of the connecting body 2b, even more preferably placed at the inner side 21 b of the connecting body 2b (shown in dashed line schematically in figure 11 (a)). Said coupling means 55, 65 can be realized in the form of holes for accommodating locking screws of the at least a movable body 6b on its own housing structure 5b and/or for the housing of one or more adjustment actuators 8' for the adjustment of the position of the at least one movable body 6b with respect to its own housing structure 5b.

In a non-illustrated embodiment, said relevant housing structure of said at least one movable body 6b may be directly the support structure 4b of the connecting body 2b. In one embodiment of the invention illustrated in the figures, said relevant housing structure of said at least one movable body 6b is a further movable body 5b between the support structure 4b and said at least one movable body 6b and movable in its own housing structure 4b along the other direction, between the directions of the width Y2 and length Z2 of the connecting body 2b, with respect to that along which said at least one movable body 6b is movable. Preferably, said at least one movable body 6b is movable along the direction of the width Y2, while said further movable body 5b is movable along the direction of the length Z2 of the connecting body 2b.

As illustrated in the figures, in particular in Figure 1 1(a), the elements 56, 66 of interference against the rotation of said at least one movable body 6b comprise:

- A tab 532 projecting from the side wall 53b of the bottom 52b of the further movable body 5b corresponding to the inner side 21 b of the connecting body 2b, transversely folded at said side wall 5b around an axis parallel to the length direction Z2 of the connecting body 2b towards the inside of the latter and formed from said side wall 53b without solution of continuity in the material forming the single metal sheet from which the further movable body 5b is shaped;

- A portion 632, preferably a free edge, of the side wall 63b of the bottom 62b of said at least one movable body 6b corresponding to the inner side 21 b of the connecting body 2b in abutment on and/or in engagement with said tab 532.

Preferably, as already mentioned above in relation to the structure of a generic movable body of the hinge 1 , both in said at least one movable body 6b, as in the further movable body 5b, the side walls 53b, 63b corresponding to the first I, I ' and the third III, III 'side of the peripheral edge of the respective bottom 52b, 62b extend each, without solution of continuity in the material forming the single metal sheet which is shaped by said at least one movable body 6b and without solution of continuity in the material constituting the single metal sheet which is shaped by the further 5b movable body, folds back around an axis parallel to the direction of the width Y2 of the connecting body 2b, in flat flange portions 533', 633 lying in a plane defined by a direction parallel to the direction of the width Y2 of the connecting body 2b and a direction parallel to the direction of the length Z2 of the connecting body 2b. As shown in particular in figure 1 (a) (but also seen in Figures 1 (1), 2, 25 (b), 26(a), 27(a), 28(b), 29(b)), the portions of the flat flange 633 of said at least one movable body 6b are resting on the flat flange portions 533' of the further movable body 5b. On the flat flange portions 533', 633 corresponding openings and/or through seats are provided for housing and/or the locking of:

- Fixing screws of said at least one movable body 6b with respect to said further movable body 5b and/or the further movable body 5b with respect to the relevant housing structure 4b, and/or

- Parts of actuators 8, 8' of the adjustment of the position of said at least one movable body 6b with respect to said further movable body 5b and/or the further movable body 5b with respect to the relevant housing structure 4b.

As mentioned in the introduction, an object of the present invention is to provide a structurally improved invisible hidden hinge for doors in which at least the structure of a movable insert and/or of a movable body is configured in such a way as to make possible to simply realize in it a seat for the insertion of a head of an adjusting actuator, the movable insert and/or the movable body and said seat being obtained with a material with high mechanical performance, at the same time realizing a considerable saving of the same material. In the following, this solution will be described with reference in particular to Figures 1a, 3 (excluding the detail indicated with "a"), 7, 13, 14, 28 illustrating it as realized on a movable insert and/or a movable body belonging to first connecting body 2a, for which the reference numbers relating to the first movable body 2a will be used. However, as already mentioned above for other details of the hinge 1 according to the invention, what is described in the following may similarly be realized on the second movable body 2b (in particular on corresponding elements and accordingly) and for an adjustment along a different direction compared to that for which the solution is specifically illustrated in the above figures. The description that follows will refer, unless otherwise explicitly mentioned, to a movable insert 5a, 5b or a movable body 5a, 5b, 6b in any of the variations described above. In the description that follows, in addition, a structure for engagement is illustrated, in at least one of the flat flange portions 533, 533', 633 of said movable insert 5a, 5b movable body 5a, 5b, 6b, of a corresponding adjustment actuator 7, 8, 8'. In addition, also in all situations in which the presence of more than one flat flange portions 533, 533', 633 has been previously described, which are symmetrical with respect to a plane parallel to the direction of the depth X1 , X2 and the width direction of Y1 , Y2 of the of the connecting body 2a, 2b (either because the two movable inserts 5a, 5b symmetrical with respect to this plane and preferably made integral with each other by articulation device 3; or because placed on opposite sides, along the direction of length Z1 , Z2 of the connecting body 2a, 2b in a movable body 5a, 5b, 6b), the structure that is described below may be realized.

The hinge 1 comprises at least one adjustment actuator 7. The actuator 7 is engaged in one of the portions of the flat flange 533 of a corresponding movable insert 5a or of a corresponding moving body 5a (in particular and preferably one for each part of a flat flange having the following described characteristics). The adjustment actuator 7 comprises, along its own direction of development, a head 70 and a stem 71. The actuator 7 provides for a reduction in diameter on the stem 71 with respect to the head 70 along its direction of development. This reduction in diameter is made consecutively to the head 70 at least for a predetermined length along the stem 71. In the figures, the reduction in diameter with respect to the head 70 is characteristic of the whole stem 71 , but could also be localized at a predetermined portion of the length of the stem according to the requirements. Furthermore, the stem 71 , here shown with a cylindrical shape, may have different shapes depending on the requirements and/or the type of adjustment actuator used (for example: the adjusting screw, the eccentric element or the like). Said adjustment actuator 7 is inserted, with its direction of development parallel to the direction of the depth X1 of the connecting body 2a, in a housing groove 72. The housing groove 72 develops perpendicularly to the direction of the depth X1 of the second connecting body. The housing groove 72 has one end 720 open for the insertion of adjustment actuator 7 and a cross section along the direction of the depth X1 of the connecting body 2a is locally complementary to said reduction in diameter on the stem 71 with respect to the head 70 so that the actuator 7 is free to rotate about an axis parallel to the direction of the depth X1 of the second connecting body but not to translate along this axis. The axis of rotation of the actuator 7 can be the common axis to the head 70 and stem 71 (as in the figures, in which an actuator 7 is depicted in the form of adjusting screw, as described below); however, the rotation axis may not coincide with an axis of symmetry of the actuator 7 (and the actuator may have no axis of symmetry), as in the case of an eccentric adjustment (solution not illustrated).

The stem 71 is engaged on connection body portions 2a in such a way that rotations in opposite actuator 7 directions around said axis parallel to the direction of the depth X1 of the connecting body 2a correspond to opposing movements of the movable body 5a with respect to the support structure 4a along a direction of adjustment. In particular, and specifically, the stem 71 may be threaded and engaged in a threaded hole (possibly provided with threaded sleeve) formed on the bottom 42a of the support structure 4a (in particular, as illustrated in the figures, in one of the end parts 41a, preferably in a proximal portion 41 1a). The housing groove 72 is formed on the flat portion of the flange 533 as described below. As previously said, at least one movable insert 5a, 5b, or at least a movable body 5a, 5b (in particular a first movable body 5a of the first connecting body 2a, or a corresponding movable body 5b, 6b on the second connecting body 2b) is shaped from a respective single metal sheet in one piece comprising a portion 500a, 500b transverse to the length direction Z1 , Z2 of the connecting body 2a, 2b that is prolonged by a own side 501a, 50 b facing in the opposite direction with respect to the direction the depth X1 , X2 of the connecting body 2a, 2b, without solution of continuity in the material forming the single metal sheet from said at least one movable insert 5a, 5b or said at least one movable body 5a, 5b which is shaped, folding around axes parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b to form a portion of the flat flange 533, 533'. Specifically, preferably, said portion 500a transverse to the direction of the length Z1 of the connecting body 2a, extends from said own side 501a facing in the opposite direction with respect to the direction of the depth X1 of the connecting body 2a without solution of continuity in the material forming the single metal sheet which is shaped by said at least one movable insert 5a or said at least one movable body 5a and folds back consecutively around respective axes parallel to the width direction Y1 of the connecting body 2a, in:

- A first portion 502a parallel to both the width direction Y1 and the length direction Z1 of the connecting body 2a and which extends along the length direction Z1 of the second connecting body away from the central part 40a of the support structure 4a;

- A second portion 503a consecutive and transverse to the first 502a, preferably at least also parallel to the width direction Y1 , and even more preferably also parallel to the depth direction of X1 , of the connecting body 2a;

- A third portion 504a, consecutive to the first one, parallel to both the width direction Y1 and the length direction Z1 of the connecting body 2a.

The third portion 504a is facing the first portion 502a at a predetermined distance from the latter in the direction of the depth X1 of the connecting body 2a and extends along the direction length Z1 of the connecting body 2a approaching to the central part 40a of the support structure 2a. The distance between the first 502a and the third 504a section corresponds to the height of the head 70 of the actuator 7 in the direction of development of the actuator 7. The groove 72 of the housing is defined by the space between the first 502a and the third 504a section, in combination with a slot 721 formed in the third portion 504a. Said slot 721 develops from the inside of the third portion 504a up to an own open end 722 positioned in correspondence with a perimetric side of the third portion 504a. The slot 721 can be inserted the stem 71 of the actuator 7. The insertion of the stem 71 of the actuator 7 in the slot 721 is made possible at least in correspondence with said reduction in diameter of the stem 71 relative to the head 70.

The above structure is simply achievable by means of operations of further folding, in that one metal sheet which is shaped by the movable insert 5a or movable body 5a in question, of that part that realizes a portion of the flat flange 533. Therefore, the movable insert 5a, in its simplest form (obtained by folding a metallic sheet), can be achieved by bending (with blanking and/or cutting which allow the realization of the slot 721 and/or open end 720 of the housing groove 72). Preferably, as mentioned above in the present description, the movable insert 5a and/or the movable body 5a (in particular the one which may coincide with the movable insert) is made with- a box-shaped structure from a single metal sheet and that can be realized by deep drawing. In the latter case, the above structure is simply achievable by means of operations of further folding, in that one metal sheet which is shaped by the movable insert 5a or the movable body 5a in question, of the part which realizes the part of a flat flange 533, in particular with blanking and/or cutting which allow the realization of the slot 721 and/or open end 720 of the housing groove 72. As mentioned in the course of the present description, in the case of the movable body 5a (in particular the one which may coincide with the movable insert), the box-like structure can have the bottom 52a as closed on at least three sides I, II, II by its board perimeter. In this case, preferably, as already mentioned above in general, the side wall 53a corresponding to the third side III realizes a further portion 500a transverse to the direction of the length Z1 of the connecting body 2a identical to that carried by the side wall 53a corresponding to the first the side and symmetrical to it with respect to a median plane of the connecting body 2a which is parallel to both the width direction Y1 and the direction of the depth X1 of the connecting body 2a. The hinge 1 also comprises a second adjustment actuator 7 similar to the first and insertable in the housing groove 72 defined in the further transverse portion 500a. To this further transverse portion 500a, an outline identical to that given above therefore applies for the transverse portion 500a placed on the other end of the movable body 5a and, for it as well, all the same parts with the same characteristics (and using in the figures, as done, the same reference numerals) can be defined respectively.

In the embodiment illustrated in Figures 3 (excluding the detail "a"), 7, 14, 28, the slot 721 has its open end 722 in correspondence with a perimetric side of the third portion 504a that is parallel to the direction of the length Z1 of the connecting body 2a. Said perimeter side of the third portion 504a is preferably that corresponding to the outer side 22a of the connecting body 2a. The open end 720 of the housing groove 72 is then composed by the space between the first 502a and third portion 504a of the transverse portion 500a in combination with the open end 722 of the slot 721. In the embodiment illustrated in Figure 13, the slot 721 has its open end 722 in correspondence of the perimeter side of the third portion 504a that is parallel to the width direction Y1 of the connecting body 2a and that is shared with the second portion 503a. On the second portion 503a a through opening 723 is practiced which communicates with the open end 722 of the slot 721 and defines, in combination with said open end 722, the open end 720 of the housing groove 72.

Advantageously, on the first portion 502a of the extension of the transverse portion 500a a through opening 505 is formed to allow a user to access with a tool the adjustment actuator head 7 from the front part of the connecting body 2a. Said through opening 505 is located at a closed end 723 of the slot 721 opposite to the open end 722. The extension of the transverse portion 500a formed by the respective first 502a, second 503a and third portion 504a is inserted in a respective housing and guide cavity 46a in the second connecting body. Said cavity housing and guide 46a is preferably formed in the support 4a, in particular in correspondence with a respective portion 411a of the end portion 41a of the support structure 4a which is proximal to the central part 40a (Figure 28 and Figure 4).

In correspondence of one of the sides 21a, 22a of the connecting body 2a, preferably at the inner side 21a, the transverse portions 550a each have a respective appendage 530a which, without solution of continuity in the material of which the single metal sheet it is composed, from which said at least one of the movable inserts 5a, 5a or at least one of the movable bodies is shaped, protrudes outwards in the opposite direction to that of the depth X1 of the connecting body 2a to support at least one fixed axis 31a of rotation of the articulation device 3. In this case, preferably, the first section 502a of the extension of the transverse portion 500a is at the side of said appendage 530a, towards the opposite side 22a, 21a of the second connecting body, preferably the outer side 22a. This structure, shown in particular in Figures 7, 13 and 14, is advantageous in that it can be easily obtained by the one metallic sheet from which the movable insert or movable body 5a is shaped. In fact, the appendage 530a may be obtained from the portion of the metal sheet from which the first section 502a is obtained, by cutting the metal sheet itself in corrspiondence of the appendage 530a and keeping it steady while the first section 502a is folded (at an angle of about 90° relative to the plane in which the appendage 530a remains).

Advantageously, the third portion 504a of the extension 500a of the transverse portion, without solution of continuity in the material of which the single metal sheet consists from which said at least one of the movable inserts and/or the movable bodies 5a is shaped, extends laterally towards the side 21a, 22a of the connecting body 2a in correspondence of which the appendage 530a is made, therein presenting a folding about an axis parallel to the length direction Z1 of the connecting body 2a to form an abutment and guide offshoot 510a on walls of the connecting body 2a, preferably on the walls of the support structure 4a. Suitably, the abutment and guide offshoot 510a is sized, shaped and positioned in such a way as not to obstruct a chance to access the fixed axis 31a of rotation of the articulation device 3 supported by the appendage 530a. The second portion 503a is preferably located around a connecting body 2a of the center plane defined by a direction parallel to the depth X1 direction and by a direction parallel to the direction of the length Z1 of the connecting body 2a.

The structure of the flat flange portions 533 described above can be used for the housing of an eccentric adjustment. In this case, the movable insert or movable body 5a adjustment with respect to the corresponding housing structure 4a can be performed along the width direction Y1 of the connecting body 2a, or along the length direction Z1 of the connecting body 2a. In an embodiment shown in the figures, the actuator 7 inserted in the housing groove 72 is rotatable about the longitudinal axis of the stem 71. The stem 71 is threaded and engaged in a corresponding female thread 73 formed on the connecting body 2a. Preferably, the female thread 73 is formed on a bottom of the support structure 4a, even more preferably on a bottom of the end portion 41a which corresponds to the adjustment actuator 7 position. The position of said at least one movable insert or at least one of the movable bodies 5a can then be adjusted in opposite directions along the direction of the depth X1 of the connecting body 2a by unscrewing and screwing the adjustment actuator 7, thus realizing a corresponding position adjustment of the hinge 1.

In general, in the hinge 1 , at least one of the movable bodies 5a, 5b, 6b is movable along on a guide in the direction of the depth X1 , X2 of the respective connecting body 2a, 2b with respect to the corresponding housing structure 4a, 4b, 5b for an adjustment of the position of the hinge 1 along said direction. Preferably, in said at least one of the movable bodies 5a, 5b, 6b, and the side walls 53a, 53b, 63b corresponding to the first I, Γ and the third III, III' side of the peripheral edge of the respective bottom 52a, 52b, 62b extend each, without solution of continuity in the material forming the single metal sheet from which said at least one of the movable bodies 5a; 5b, 6b is shaped and folding back around an axis parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b, into flat flange portions 533, 533', 633 lying on a plane defined by a direction parallel to the width direction Y1 , Y2 of the connecting body 2a, 2b and from a direction parallel to the direction of the length Z1 , Z2 of the connecting body 2a, 2b. At each of said flat flange portions 533, 533, 633 is engaged a corresponding adjustment element 7, 7', 8 for the adjustment of the position of said at least one of the movable bodies 5a, 5b, 6b with respect to the relevant housing structure 4a, 4b, 5b.

As already described above and as shown in particular in relation to the first connecting body 2a (as said, purely by way of example, being able to do the same thing also on the second 2b), the movable body 5a may provide portions of flat flange 533 shaped in a first 502a, second 503a and third portion 504a as described above to provide a housing groove 72 for an adjustment actuator 7 (in particular for its head 70). An alternative solution to this is illustrated in particular in Figures 2, 3(a), 8, 29, always with reference to the first housing body 2a, but in a purely example-like way, being able to realize the same structure even on the second connecting body 2b; furthermore, even if the solution is described with reference to a movable body 5a whose housing is directly the support structure 4a, nothing impedes to realize the same solution also in a more nested movable body within the respective housing body (said movable body being able to also be an intermediate element in said nested structure and not necessarily the most distal element from the support structure). With this warning, in the alternative solution illustrated in particular in Figures 2, 3(a), 8, 29, in said at least one of the movable bodies 5a, 5b, 6b (the movable body by way of example indicated with the reference numeral 5a), the walls side 53a corresponding to the first I and third III side of the peripheral edge of the respective bottom 52a extend each, without solution of continuity in the material forming the single metal sheet from which said at least one of the movable bodies 5a is shaped and folding back around an axis parallel to the direction of the width Y1 of the connecting body 2a, in flat flange portions 533 lying on a plane defined by a direction parallel to the width direction Y1 of the connecting body 2a and from a direction parallel to the length direction Z1 of the connecting body 2a. In each of said flat flange portions 533, a corresponding through- opening 54'a is practiced for the insertion of an adjustment member T of the position of said at least one of the movable bodies 5a with respect to the relevant housing structure 4a. In one embodiment not illustrated in the figures, but that can be easily derived from, the through opening may be a through hole 54'a in which the stem of an adjustment screw is inserted which goes to engage in a corresponding thread, which is made in parts of the movable body 2a different from said at least one of the movable bodies 5a. Preferably, the thread in which the adjustment screw engages is made in the relevant housing structure 4a. To prevent the translational movement of the adjusting screw along its own axis with respect to the flat portion of the flange 533, selective locking means are provided for locking said translation, the locking means do not prevent the rotation of the screw about its axis, for example a stop ring (preferably of the type so-called "Seeger"). The through-opening can also be a slot which is open in correspondence of a free side edge of the flat flange portion 533. In this case, in addition to the adjusting screw engaged as described above, it is possible to use an adjusting actuator 7' in the form of a threaded element, which provides, in correspondence with and below its own head, a reduction in diameter for an axial length equal to the thickness of the flat flange portion 533, so as to allow the insertion into the slot, blocking the axial translation, but at the same time allowing its free rotation around the axis. The threaded member can then be engaged in a corresponding thread, made in parts of the movable body 2a different from said at least one movable body 5a. Preferably, the thread in which the threaded element engages is made in the relevant housing structure 4a. In the embodiment specifically illustrated in the figures, in correspondence of the through opening 54'a, the portion of the flat flange 533 is bent to form a corresponding threaded sleeve 57 which surrounds said through opening 54'a and extends away from the flat flange portion 533 by a predetermined distance toward the inside of the second connecting body along the direction of the depth X1. In each threaded sleeve 57 a corresponding threaded pin 570 is engaged, which is rotatably coupled to the relevant housing structure 4a and/or the support structure 4a with its longitudinal axis parallel to the direction of the depth and without freedom to translate along said longitudinal axis. The threaded pin 570 realizes the adjustment actuator T. Rotations in opposite directions of the threaded pin 570 determine opposite movements of the movable body 5a along the direction of the depth X1 of the connecting body 2a. Each of said flat flange portions 533 extends, on a own side edge and without solution of continuity in the material of which the single metal sheet consists from which said at least one of the movable bodies 5a is shaped, in one or more portions folded around an axis parallel to the direction of the length Z1 and/or to the direction of the width Y1 of the connecting body 2a and having at least a portion lying in a plane parallel to the direction of the depth X1 of the connecting body 2a, to form one or more matching tabs 534 of abutment on walls of the relevant housing structure 4a and/or the support structure 4a. Said abutment tabs 534 at least assist the guidance of the movement of said at least one of the movable bodies 5a along the direction of the depth X1 of the connecting body 2a. At least one abutment tab 534 is realized in correspondence of the flat flange portion 533 which is located at the first I and/or third III side. At least one abutment tab 534 is formed at one of the sides 21a, 22a of the connecting body 2a, preferably at the inner side 21a. The abutment tab 534 formed on the side 21a, 21 b of the connecting body 2a, if corresponding to the side of the connecting body 2a in correspondence of which the at least one fixed axis 31a, 31 b of the pivot device 3 is placed, must be shaped suitably in such a way as to allow the insertion of the relative rotation pins.

In a preferred embodiment, illustrated in the figures, the first connecting body 2a comprises a respective supporting structure 4a and a respective first movable body 5a movable with respect to the support structure 4a, which is its housing structure, along the depth direction X1 of the first connecting body 2a. Said respective first movable body 5a is a movable body according to any of the variations previously described and adaptable to a position of adjustment along the direction of the depth X1 , X2 of the respective movable body 2a, 2b. The connecting body 2a comprises a respective support structure 4b, a respective first movable body 5b having the respective support structure 4b as its housing structure, and a respective second movable body 6b having the respective first movable body 5b as its structure housing. Said respective first movable body 5b is movable relative to the support structure 4b along the direction of the length Z2 of the second connecting body 2b. Said respective second movable body 6b is movable relative to the respective first movable body 5b along the direction of the width Y2 of the second connecting body 2b. The nested structure of the second connecting body 2b is made according to any of the previously described variations in which at least a movable body (in this case corresponding to the "respective second movable body 6b" above) is housed inside a respective housing structure, in particular realized by a further movable body (in this case corresponding to the "respective first movable body 5b" above), which is in turn housed inside a respective housing structure (in particular the support structure 4b).

In the hinge 1 according to the invention, the articulation device 3 that connects to each other the first 2a and the second 2b connecting body comprises at least a first arm 32 having a first end 32a engaged directly or indirectly on the first connecting body 2a and a own second end 32b, opposite the first, engaged directly or indirectly on the second connecting body 2b. The articulation device 3 comprises at least a second arm 32 'having a first end 32'a engaged directly or indirectly on the first connecting body 2a and a own second end 32'b, opposite the first, directly or indirectly engaged on the second connecting body 2b.

The sixth direction Z2 in space, that is the direction of the length Z2 of the second connecting body 2b is parallel to the third direction Z1 in space, which is in turn the direction of the length Z1 of the first connecting body 2a in space.

Said first arm 32 is shaped starting from a respective single metal sheet in one concave piece with its concavity directed towards a reference plane parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b and passing through the ends 32a, 32b of the first arm 32. The reference plane of the first arm 32 is shown in Figures 15(d), 15(f), 16(d), 16(f) by a dashed line T which represents its track in the plane of the sheet (which, in the figures 15(d), 15(f), 16(d), 16(f) is perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b).

Said concavity of the only concave piece, in which said first arm 32 is shaped, is defined, in combination:

- By a shaped bottom 320 of the first arm 32 which, in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b (plane of the sheet in Figures 15(d), 15(f), 16(d), 16(f)), following a concave curve with concavity facing towards the first reference plane, said curve connecting to each other the ends 32a, 32b of the first arm 32, said bottom 320 further providing a first 322 and a second 323 transverse side which are arranged on opposite sides of the bottom 320 along the direction of length Z1 , Z2 of the connecting bodies 2a, 2b and _r which develop transversely to said direction of length Z1 , Z2, preferably perpendicular to it;

- At least in correspondence of the first 322 and the second transverse side 323 of the bottom 320 from the side walls 321 of the first arm 32 that rise from the bottom 320 away from this towards the first reference plane, making therein corresponding sections of a peripheral edge of the bottom 320, each of which is continuous and joined to the bottom without solution of continuity in the material forming said respective single metal sheet.

A first longitudinal side 324 of the bottom 320, corresponding to the first end 32a of the first arm 32, and a second longitudinal side 325 of the bottom 320, corresponding to the second end 32b of the first arm 32, opposite each other and which extend parallel to the direction of length Z1 , Z2, ideally define with the first 322 and the second 323 transverse side a geometric figure that, in orthogonal projection on the reference plane, is substantially quadrilateral. One such projection is shown in Figure 15(c) and 16(c), wherein, to locate said substantially quadrilateral figure, one should ideally extend the two transverse sides 233, 323 >to the ends indicated with 32a, 32b.

Said second arm 32 is shaped from a respective single metal sheet in one piece concave with the concavity facing towards a respective reference plane parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b and passing through the ends 32'a, 32'b of the second arm 32'. The reference plane of the second arm 32' is shown in Figures 17 (d), (f), (g), 18 (d), (f), (g) by a dashed line T' which represents its track in plane of the sheet (which, in figures 17 (d), (f), (g), 18 (d), (f), (g) is perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b).

Said concavity of the one concave shaped piece in which is said second arm 32' is defined, in combination:

- By a shaped bottom 320' of the second arm 32' that, in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b (plane of the paper in Figures 17 (d), (f), (g), 18 (d), (f), (g)), following a concave curve with concavity facing towards the respective reference plane, said curve connecting to each other the ends 32'a, 32'b of the second arm 32', said bottom 320' further providing a first 322' and second 323' transverse side which are arranged on opposite sides of the bottom 320' along the direction of length Z1 , Z2 of the connecting bodies 2a, 2b and which extend transversely to the said direction of the length Z1 Z2, preferably perpendicular to it;

- At least in correspondence of the first 322' and second 323' transverse side of the bottom 320' by side walls 321 ' of the second arm 32' that rise from the bottom 320' away from this towards the respective first reference plane, realizing therein corresponding traits of a peripheral edge of the bottom 320' each of which is continuous and joined to the bottom without solution of continuity in the material forming said respective single metal sheet.

A first longitudinal side 324' of the bottom 320', corresponding to the first end 32'a of the second arm 32', and a second longitudinal side 325' of the bottom 320', corresponding to the second end 32'b of the second arm 32', opposite to each other and that extend parallel to the direction of the length Z1 , Z2, ideally define with the first 322' and second 323' transverse side a geometric figure that, in orthogonal projection on the respective reference plane, is substantially quadrilateral. One such projection is shown in Figure 17 (c), 17 (e), 18 (c), 18 (e), wherein, to locate said substantially quadrilateral figure, account must be taken of the hatch which completes ideally the first longitudinal side 324'.

Said curve formed by the first arm 32 and/or the second arm 32' in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the first and of the second connecting body 2a, 2b can be a broken line (composed of two or consecutive segments), an arc (in particular of circumference and/or ellipse) and/or combinations of the same, drawing several forms in said perpendicular plane (for example "V- or "U"-shaped or similar). The curves corresponding to the two arms 32, 32' may be symmetrical to each other, the same or different depending on the needs.

Such a concave three-dimensional structure, which contribute to the side walls 321 , 321 ' and the bottom 320, 320' (also with a concave orthogonal projection in the plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b), confers to an arm 32, 32' a good mechanical resistance, that allows to realize the piece with a single metal sheet of limited thickness, with considerable saving of material and/or increase in performance compared to the corresponding arms of the known art, with respect to equal general geometric shape of the arms. The piece can be achieved by drawing.

The articulation device 3 may be composed of a single arm 32, 32', or by two or more arms 32, 32'. In a configuration comprising at least the first 32 and the second arm 32', preferably, as illustrated in the figures, said second arm 32' is hinged to the first arm 32 in correspondence with a common rotation axis R parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b and passing between the two ends 32a, 32b, 32'a, 32'b of each arm 32, 32'. Advantageously, always as shown in the figures, at least in correspondence with the rotation axis R, portions of an arm 32, 32' contiguous to portions of another arm 32', 32 face to each other their side walls 321 ,321 ' 'that extend transversely, preferably perpendicularly, to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b (see, in particular, figures 1 , 2, 3, 24, 26-29. This type of coupling is particularly visible in figure 27 (b) and in Figure 28). The articulation device 3 can also comprise a plurality of arms 32, 32' hinged to one another in correspondence with the rotation axis R parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b and passing between the two ends 32a, 32b, 32'a, 32'b of each arm 32, 32'. All arms have concave three-dimensional structures with similar characteristics (even though, as we shall see, in a sense complementary, at least in orthogonal projection on a plane parallel to the reference plane T, T' of each arm).

Advantageously, the arms 32, 32' of the articulation device 3 coupled to each other in correspondence with the axis of rotation R realize a structure along the direction of length Z1 , Z2 of the connecting bodies 2a, 2b has a length substantially equal to that of the seat in which the articulation device 3 is enclosed. In this way, one obtains a much more resistant hinge 1 , in particular to the flexure consequent to the opening of the door. In correspondence of the first 322, 322' and/or of the second 323, 323' transverse side of the bottom 320, 320' of an arm 32, 32', the bottom 320, 320' itself extends, spreading, along the first 324, 324' and/or along the second 325, 325' longitudinal side besides said first 322, 322' and/or second 323, 323' transverse side. A solution of this kind for the first arm 32 is illustrated in continuous curves on the first longitudinal side 324 and (alternatively or additionally) in dotted curves on the second longitudinal side 325 in Figures 15 (c) and 16 (c). A solution of this kind for the second arm 32' is always shown in dotted lines on the first longitudinal side 324' and (alternatively or additionally) on the second longitudinal side 325' in Figures 17 (c), 17 (e) and 18 ( c), 18 (e). As shown in particular in the portions in the continuous curve of the figures above mentioned (and also in the remaining figures that illustrate the arms 32, 32'), the side wall 321 , 321' corresponding to said first 322, 322' and/or second 323, 323' transverse side is prolonged, without solution of continuity of the material constituting said respective single metal sheet from which the arm 32, 32' is shaped, for a predetermined distance along said extension of the first

324, 324' and/or of the second 325, 325' longitudinal side to prolong the corresponding portion of the peripheral edge of the bottom 320, 320' in a configuration that in the orthogonal projection on the respective reference plane T, T' assumes a configuration at least "L"-shaped. Preferably, the side wall 321 , 321 ' corresponding to said first 322, 322' and/or second 323, 323' transverse side is prolonged, without solution of continuity of the material constituting said respective single metal sheet from which the arm 32, 32 ^* is shaped up to one end of the first 324, 324' and/or of the second

325, 325' longitudinal side, folding back on the latter and extending correspondingly the section of the peripheral edge of the bottom 320, 320' corresponding to the first 322, 322' and/or second 323, 323' transverse side of the bottom 320, 320', keeping it continuous and joined to the bottom 320, 320' without solution of continuity of the material constituting the single metal sheet from which the arm 32, 32' is shaped.

This creates on the first and/or second longitudinal side of the bottom, at the junction with the first and/or the second transverse side, a locally stepped and/or "Z"- and/or "S"-shaped configuration, depending on the orientation of the corresponding arm, as well visible, for example, in Figure 15 (if one considers, one at a time, the upper part or the lower part of the arm 32 in correspondence of the longitudinal first side 324).

The extensions are also stiffened by the prolongation of the side walls 321 , 321 ' as well as of that of the bottom 320, 320'.

Always with reference to Figures 15 (c) and 16 (c) for the first arm 32, as well as to Figures 17 (c), 17 (e) and 18 (c), 18 (e) for the second arm 32', both in correspondence of the first 322, 322' and second 323, 323' transverse side of the bottom 320, 320', the same bottom 320, 320' extends, spreading, along the first 324, 324' and/or along the second 325, 325' longitudinal side both besides said first 322, 322' and said second 323, 323' transverse side. The side walls 321 , 321 ' corresponding to said first 322, 322' and second 323, 323' transversal side each extend, without solution of continuity of the material constituting said respective single metal sheet from which the arm 32, 32' is shaped, along the respective extension of the first 324, 324' and/or the second 325, 325' longitudinal side to prolong the corresponding portion of the peripheral edge of the bottom 320, 320' in a configuration that, in the orthogonal projection on the respective first reference plane, assumes a configuration substantially specular with respect to a center plane of the bottom 320, 320' perpendicular to the reference plane of the arm 32, 32'.

The bottom 320, 320' of the arm 32, 32' is so projected onto the reference plane in a "T"- or "H"-shape figure. The "T"-shape has the "stem", or prong, horizontal (see also the reference number 329 in Figure 23 (b)) and the "hat" (the portion corresponding to the first and/or second longitudinal side 324, 324', 325, 325') which can also be asymmetric, depending on the requirements. Also the "H" shape can present the horizontal portion not exactly at half height. The vertical extensions of the "H" shape are not necessarily of equal length with each other, but can be realized each with its own predetermined length depending on the requirements. Preferably, also in this case, the side walls 321 , 321' corresponding to both said first 322, 322' and said second 323, 323' transverse side are prolonged, without solution of continuity of the material constituting said respective single metal sheet from which arm 32, 32' is shaped, until the two ends of the first 324, 324' and/or of the second 325, 325' longitudinal side, folding back on the latter and extending correspondingly the section of the peripheral edge of the bottom 320, 320' corresponding to the first 322, 322' and second 323, 323' transverse side of the bottom 320, 320' and keeping it continuously joined to the bottom 320, 320' without solution of continuity of the material constituting the single metal sheet from which the arm 32, 32' is shaped.

This creates on the first and/or second longitudinal side of the bottom, both in correspondence of the junction with the first and with the second transverse side, a locally stepped and/or "Z"- and/or "S"-shaped configuration, depending on orientation of the corresponding arm, as well visible, for example, in Figure 15 (if one considers, one at a time, the upper part or the lower part of the arm 32 in correspondence of the longitudinal first side 324).

In one embodiment of the articulation device 3, the bottom 320, 320' and the related side walls 321 , 321' of an arm 32, 32' realize a structure in which the orthogonal projection onto the reference plane of the arm 32, 32' assumes a symmetrical configuration with respect to an axis of the center line of the arm 32, 32' parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b. This means that the bottom 320, 320' extends also along the second longitudinal side 323, 323' widening, with the side walls 321 , 321 ' of the first and/or the second transverse side 322, 322' that realize the same "L"- and/or "S"- and/or "Z"-shaped or steped structure. If this happens in correspondence of both transverse sides 322, 322', the bottom 320, 320' (and also the corresponding arm 32, 32', of course...) assumes a configuration that, projected on the reference plane of the arm, is "H"-shaped.

If this happens only at the first or the second of the transverse sides 322, 322', the bottom 320, 320' (and also the corresponding arm 32, 32', of course...) assumes a configuration that, projected on the plane of the reference arm, is "U"- or inverted "U"-shaped. See, for example, Figure 15 (d) and Figure 16 (d), considering the dashed part as integration of solid line one and considering one at a time the portions of the figure which are located one on one side and one on the other side of the section plane D'- □'_ ^' □ ^»< _□ ^»■ (th _e p _0r tj _on of the opposite figure to said track having to be thought without dashes and extensions of the longitudinal sides): the portion of the figure above the trace of the plane of section D'-D', D'" - D'" shows a "U"-shaped configuration, while that below it illustrates a configuration of inverted "U" shape.

With reference in particular to Figures 17 and 18, as well as to Figure 23, on the bottom 320' of an arm 32', one or more through slots 326 are made, which extend parallel to both the first 322' and second 323' transverse side the bottom 320'. In the figures, this feature is illustrated in the second arm 32' and the numerical references are assigned accordingly. However, the same structure (or similar structure) may also be implemented on the first arm 32, or on any of the arms 32, 32' that make up the articulation device 3. This observation applies to the description which follows and for the relevant details.

Each of the one or more through slots 326' has at least:

- A first 326'a and a second 326'b transverse edge, which extends transversely, preferably perpendicularly, to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b;

- At least one first longitudinal edge 326'c, that, placed on the side of the through slot 326' facing the first 324' or the second 325' longitudinal side of the bottom 320', runs parallel to the direction of the length Z1 , Z2 of connecting bodies 2a, 2b (in the figures the first longitudinal edge 326'c is explicitly indicated in respect of the second side 325' of arm 32').

Along the first transverse edge 326'a, along the first longitudinal edge 326'c and along the second transverse edge 326'b, transverse walls 321' of arm 32' rise from the bottom 320' away from this towards the reference plane T' and therein form a respective continuous portion of the peripheral edge of the bottom 320', joined to the bottom without solution of continuity of the material constituting the single metal sheet from which the arm 32' is shaped and that surrounds the whole slot 326' passing on all of said edges.

Said one or more slots 326' of the bottom 320' are extended, together with the associated peripheral edge, to the second 325' or, respectively, the first 324' longitudinal side, where they are open (in the figures the open part of one or more slots 326' of the bottom 320' is explicitly shown and illustrated in correspondence of the first side -324' of arm 32'). The second 325' or, respectively, the first 324' longitudinal side of the bottom 320' it is thus broken into a series of successive sections equal to the number of through-slots 326' increased by one unit. The arm 32' thus has a series of shaped prongs 329' which extend from the first 324' or the second 325' longitudinal side of the bottom 320' (illustrated in the figures is the case of the shaped prongs 329' which extend from the second side 325' of arm 32'). Therefore, the shaped prongs 329' branch off from the first 32'a or, respectively, from the second end 32'b of the same arm 32' (in the figures, in particular, shows a case in which the shaped prongs 329' branch off from the second end 32'b), to realize, when the first 324' and second 325' longitudinal side of the bottom do not extend beyond the transverse sides 322', 323' of the same, a "C" structure formed by the two end shaped prongs 329' and by the first 32'a or by the second end 32'b (in the figures: from the second end 32'b). In one embodiment not shown explicitly in the figures, but easily deducible from what is described and illustrated, such a "C" structure may possibly enclose one or more additional shaped prongs 329' between the two shaped prongs 329' ends, to form a comb structure. When the first 324' or the second 325' longitudinal side extends beyond the two transverse sides 322', 323' of the bottom 320', the arm 32' assumes an "L" or "T" structure comprising a comb with one or more shaped prongs 329' in addition to that which would produce the base of the "L" or the (horizontally oriented) stem of the "T".

If also the second 325' or, respectively, the first 324' longitudinal side extends beyond the two transverse sides 322' 323' of the bottom 320', the perimetric edge of the bottom 320' corresponding to the first 322' and/or the second 323' transverse side of the bottom 320' assumes a shape of a "U" or, respectively, inverted "U". Obviously, the structures described here can never be symmetrical with respect to a centerline plane of the arm 32' parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b, being the through slots 326' open on one side. Alternatively, in an embodiment illustrated only schematically in dashed lines in Figures 17 (c), 17 (e) and in Figures 18 (c), 18 (e), said one or more slots 326' of the bottom 320' are closed in correspondence of one of their second longitudinal edge 326'd opposite to the first 326'c, the section of the peripheral edge of the bottom 320' corresponding to each of the one or more slots 326' enclosing the whole slot 326' corresponding on all its edges. The second 325' and/or the first 324' longitudinal side of the bottom 320' it is thus continuous. The arm 32' thus has a closed frame, possibly prolonged in correspondence with the structure of one or both of its longitudinal sides 324', 325', and which is internally provided with either a single hole or a sort of "grid" that crosses with transverse elements the internal opening to the frame.

Obviously, this structure may be symmetrical with respect to a centerline plane of the arm 32' parallel to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b.

With the forms described so far one can produce structures with at least two arms engaged on one another in a complementary manner. For example, always taking as reference an orthogonal projection of arm 32, 32' on its own reference plane T, T', they can bind complementary to each other: a U-shaped structure and a corresponding inverted "U-shaped" structure; a T-shaped structure with a corresponding C-shaped structure (for example as happens to arms 32, 32' illustrated in Figures 1 and 3); a T-shaped structure (like that of the first arm 32) coupled with a closed frame, or "O"-shaped (like that of the second arm 32', completed with the closing of the first side wall 324'); an "H"-shaped structure (like that of the first arm 32 of Figure 15 (c) completed as from the corresponding dashing at the second longitudinal side 325) combined with a corresponding "C"- shaped structure (like that of the second arm 32' illustrated by continual line for example in Figure 17 (c)) whose prongs fit in top and bottom spaces of the "H"-shaped structure; a "L"-shaped structure with a ^• corresponding inverted L-shaped structure; and so on.... The arm can also be a simple structure (with a bottom that, in projection on the reference plane, is rectangular and has the side walls on the two transverse sides) and combine with another simple arm and/or with other simple arms, or with one or more arms according to any of the preceding forms, depending on the need, the structural convenience or the like. Obviously, in the light of what has been described and illustrated, one can also realize structures with a number of arms greater than two, for example coupled to one another and to a common axis of rotation that passes between the ends thereof, in a suitable way.

Preferably, in each slot 326', that in the bottom 320' of an arm 32' extends parallel to the first 322' and/or the second 323' transverse side of the bottom 320', a corresponding prong 329 is inserted to another arm 32 extending parallel the first 322 and/or to the second 323 transverse side of the respective bottom 320, in a substantially complementary configuration at least in correspondence to the axis of rotation R.

Suitably, at at least one end 32a, 32b, 32'a, 32'b of the arm 32, 32' on the bottom 320, 320' is extended by at least sections of, or by all, the corresponding longitudinal side 324, 325, 324', 325' towards the outside and transversely to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b cylindrically folding back on itself around an axis parallel to the direction of the length Z1 , Z2 of connecting bodies 2a, 2b, to form at least partially a cylindrical seat 327a, 327b, 327'a, 327'b, continues at least in sections along its axis, for the housing of at least a corresponding pin for defining a respective axis of rotation Ra, Rb , R'a, R'b.

The cylindrical seat 327a, 327b, 327'a, 327'b (or one or more of its sections if it is discontinuous) has its ends in contact with the corresponding side walls 321 , 321' of the arm 32, 32' which run transversely (preferably perpendicular) to the direction of the length Z1 , Z2 of the second connecting bodies, 2b. In Figures 16 and 18, cylindrical seats 327a, 327b, 327'a, 327'b are illustrated that fold in front of an edge of said side walls 321 , preferably up to get in contact with the same. In Figure 18, on the first longitudinal side 324' two sections 327'a of seats (or, if desired, two separate seats 327'a) are present: one in correspondence with a first prong of the bottom 320' and the other in correspondence of a second prong of the bottom 320'. These separate sections define an axis of rotation indicated with R'a. On the second longitudinal side 325' there is a single seat 327'b that develops for the entire length of said second longitudinal side 325'. Such single seat defines an axis of rotation indicated with R'b. In Figure 16, a similar configuration is visible. A seat 327a is spread throughout the longitudinal first side 324 of the bottom 320 (in this case up to the prolongations of the latter beyond the first 322 and/or the second transverse side 323 of the bottom 320) going into contact with the edges of the side walls 321 extensions lining the first 322 and the second 323 transverse side of the bottom 320. This seat defines an axis of rotation indicated with Ra. A seat 327b, localized in correspondence of the second longitudinal side 325, is spread across the width of a prong of the bottom 320. The latter seat defines an axis of rotation indicated by Rb.

Preferably, wherever possible, one adopts a configuration in which the cylindrical seat 327a, 327b, 327'a, 327'b (or one or more of its sections if it is discontinuous) is preferably between said corresponding side walls 321 , 321 ' of the arm 32, 32'. Between said corresponding side walls 321 , 321' of the arm 32, 32' and said contacting ends, there may be discontinuities in the material forming the single metal sheet from which the arm 32, 32' is shaped (the latter feature in particular making the most simple embodiment of the arm by deep drawing followed by drilling or cutting and bending). In Figures 15 and 17, cylindrical seats 327a, 327b, 327'a, 327'b are illustrated that have this feature. In Figure 17, on the first longitudinal side 324' two sections 327'a of seats (or, if desired, two separate seats 327'a) are present: one in correspondence with a first prong of the bottom 320' and the other in correspondence a second prong of the bottom 320'. These separate sections define an axis of rotation indicated with R'a. Each of the two separate sections is inserted between corresponding sections of the side walls 321 ' corresponding to the long sides of the respective prong. On the second longitudinal side 325' there are two seas 327'b, one in correspondence of one end and the other in correspondence of the other end of the second longitudinal side 325'. These seats define an axis of rotation indicated with R'b. Each seat is in contact with the inner face of a side wall 321' which corresponds to transverse side 322', 323' in correspondence of which the seat is placed. In Figure 15, a similar configuration is visible. Two locations 327a, one in correspondence of one end and the other in correspondence of the other end of the first longitudinal side 324'. This seat defines an axis of rotation indicated with Ra. Each seat is in contact with the inner face of a side wall 321 which corresponds to the transverse side 322, 323 at which the seat is placed (in particular the side wall portion 321 which is the extension to the end of the first longitudinal side 324). A seat 327b, localized in correspondence of the second longitudinal side 325, is spread across the whole width of a prong of the bottom 320. The latter seat defines an axis of rotation indicated by Rb. Said seat is inserted between corresponding sections of the side walls 321 corresponding to the long sides of the respective prong. In correspondence with the cylindrical seats 327a, 327b, 327'a, 327'b, the side walls 321 , 321' preferably have through holes 328, 328' to allow the passage of corresponding pins.

In general, in the side walls 321 , 321' of the arm 32, 32' which run transversely (preferably perpendicularly) to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b, one or more through holes 328, 328' are drilled for the insertion of at least one pin for the definition of one or more respective axes of rotation R, Ra, Rb, R'a, R'b. As illustrated by way of example in Figures 15 (b), 15 (e), 16 (b), 16 (s) (the illustration is given by way of example with reference to the first arm 32, but it is understood that the same feature could also be realized on the second arm 32' or on any of the arms 32, 32' according to the needs), in correspondence of at least one of said through holes 328, the corresponding side wall 321 of the arm 32 extends along the axis of the through hole 328 in a respective sleeve. Two side walls 321 consecutive along the direction of length Z1 , Z2 of the connecting bodies 2a, 2b and equipped with through-hole 328 with sleeve preferably have said sleeves which develop coaxially towards one another or in the opposite direction.

The first arm 32 has the first end 32a hinged on the first connecting body 2a in correspondence of a respective rotation axis Ra parallel to the direction of the length Z1 of the first connecting body 2a. The second arm 32' has the second end 3b' hinged on the second connecting body 2b in correspondence of a respective rotation axis R'b.

The first arm 32 has the second end 32b movable by driven motion with respect to the second coupling body 2b and the second arm 32' has the first end 32'a movable by driven motion with respect to the first connecting body 2a. In general, the axis of rotation Rb defined at the second end 32b of the first arm 32 and the axis of rotation R'a defined in correspondence of the first end 23'a of the second arm 32' will not be fixed in space with respect to any of the connecting bodies 2a, 2b, but will move by guided motion exactly a the respective ends 32b, 32'a of the arm 32, 32'. In one embodiment not illustrated in the figures, the first end 32'a of the second arm 32' is engaged in a respective sliding guide on the first connecting body 2a, and/or the second end 32b of the first arm 32 is engaged in a respective sliding guide on the second connecting body 2b. In the presence of movable inserts 5a, 5b and/or movable bodies 5a, 5b, 6b housed in respective housing structures on the connecting bodies 2a, 2b, the sliding guides are preferably realized on movable inserts 5a, 5b and/or on movable bodies 5a, 5b, 6b most distal from the respective support structures 4a, 4b. In one embodiment illustrated in the accompanying figures, the articulation device 3 also comprises a first connecting rod 33 having a first end 33a hinged to the second ends 32b of the first arm 32 in a corresponding rotation axis Rb and a second end 33b opposite to the first and hinged to the second connecting body 2b of the body in a corresponding rotation axis R1 b. The motion of the second end 32b of the first arm 32 (and thus also of the corresponding rotation axis Rb) with respect to the second connecting body 2b is guided by the first connecting rod 33. The articulation device 3 also comprises a second connecting rod 33' having a first end 33'a hinged to the first connecting body 2a in a corresponding axis of rotation R1a and a second end 33'b opposite to the first and hinged to the first end 32'a of the second arm 32' in a corresponding R'a rotation axis. The motion of the first end 32'a of the second arm 32' (and thus also of the corresponding rotation axis R'a) relevant to the first connecting body 2a is driven by the second connecting rod 33'. In the presence of a plurality of arms 32, 32' (in particular having a common axis of rotation R), it is possible to provide a corresponding plurality of connecting rods 33, 33'.

With reference now in particular to Figures 19 to 22, one illustrates a specific and advantageous structure of the first 33 and second 33' connecting rod. The structure is similar to that already described for the first 32 and/or for the second 32' arm, for which the conventions used in the description will be the same.

Said first 33 and/or said second 33' connecting rod is shaped from a respective single metal sheet in one concave piece with the concavity facing towards a respective reference plane parallel to the direction of the length Z1 , Z2 of connecting bodies 2a, 2b and passing through the ends 33a, 33b, 33'a, 33'b of the first 33 or, respectively, of the second 33' connecting rod.

The reference plane of the first connecting rod 33 is shown in Figures 19 (f), 19 (g) and 20 (g), where it is represented with its trace on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b (see the corresponding dotted line) and indicated with the reference symbol T1.

The reference plane of the second connecting rod 33' is shown in Figures 21 (f) and 22 (f), where it is represented with its trace on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b (see the corresponding dotted line) and indicated by the reference symbol T1 '.

Said concavity of the concave shaped piece in which the first 33 and/or the second connecting rod 33' is shaped is defined, in combination, respectively:

- By a shaped bottom 330, 330' of the first 33, respectively the second 33' connecting rod which, in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b, follows a curve that connects together the ends 33a, 33b, 33'a, 33'b of the first 33, respectively the second 33' connecting rod, said bottom 330, 330' also providing a first 332, 332' and a second 333, 333' transverse side that are placed on opposite sides of the bottom 330, 330' along the direction of length Z1 , Z2 of connecting bodies 2a, 2b and which develop transversely to said direction of length Z1 , Z2, preferably perpendicular to it;

- At least in correspondence of the first 332, 332' and second 333, 333' transverse side of the bottom 330, 330' from side walls 331 , 331' of the first 33, respectively the second 33' connecting rod that rise from the bottom 330, 330' away from this towards the reference plane T1 , TV, and therein realizing corresponding sections of a peripheral edge of the bottom 330, 330' each of which is continuous and joined to the bottom without solution of continuity in the material forming said respective single metal sheet.

The curve that the shaped bottom 330, 330' of the first 33, respectively the second 33' connecting rod defines in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b can be a line segment (as illustrated in the figures), or any other convenient curve, in particular a concave curve with concavity facing towards the reference plane T1 , TT of the connecting rod 33, 33' according to all the procedures described for the first 32 and/or for the second 32' arm.

• A first longitudinal side 334, 334' of the bottom 330, 330', corresponding to the first ends 33a, 33'a of the first 33, respectively the second 33' connecting rod, and a second longitudinal side 335, 335' of the bottom 330, 330', corresponding to the second end 32b, 32'b of the first 33, respectively the second 33' connecting rod, opposite to each other and that extend parallel to the direction of the length Z1 , Z2, ideally define with the first 332, 332' and the second 333, 333' transverse side a geometric figure that, in orthogonal projection on the reference plane, is substantially quadrilateral.

By matching Figure 17 with Figure 19, on one hand, and Figure 18 with Figure 20 on the other, it is possible to detect a close analogy between the embodiments of the second arm 32' and the embodiments of the first connecting rod 33. If one ignores the fact that the curve that the shaped bottom 330 of the first connecting rod 33 defines in orthogonal projection on a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b is, in the form illustrated in the figures, a segment of straight line (while for the second arm 32' it is a curve shaped in a different way), what distinguishes the first connecting rod 33 and second arm 32' is primarily (except other minor details) the fact that in orthogonal projection on the respective reference planes: the first connecting rod 33 has much shorter prongs of the second arm 32'; the bottom 330 of the first connecting rod 33 and its extension at the second longitudinal side 335 define an area proportionally larger than that of the prongs, with respect to what the bottom 320' of the second arm 32' and its extension in correspondence of the second longitudinal side 325' do. Similarly, by matching Figure 15 with Figure 21 , of the one part, and Figure 16 with Figure 22 on the other, it is possible to detect a close analogy between the embodiments of the first arm 32 and the forms of realization of the the second connecting rod 33'. Apart from the fact that the curve that the shaped bottom 330' of the second connecting rod defines in orthogonal projection onto a plane perpendicular to the direction of the length Z1 , Z2 of the connecting bodies 2a, 2b is, as shown in the figures, a line segment (while for the first 32 arm is a curve shaped differently), what distinguishes second connecting rod 33 and first arm 32 is mainly (apart from other minor details) that in orthogonal projection on the respective reference planes: the second connecting rod 33' has prong much shorter than the first arm 32; the part of the bottom 330' of the second connecting rod 33' which extends, in correspondence of the first longitudinal side 334', beyond the first 322' and/or second 333' transverse side, defines a surface proportionally wider than that of prong, in comparison with what the corresponding portion of the bottom 320 of the first 32 arm which extends beyond the first 322 and/or the second 323 transversal side in correspondence of the first longitudinal 324. Once noted these close similarities, it is also possible to apply directly to the first 33 and/or the second connecting rod 33' all what is specified in relation to the second 32' and, respectively, to the first arm 32 according to all their possible variations (with the only caveat that the first and the second connecting rod 33, 33' are generally not coupled to each other on a single axis of rotation, as it is the case in the first and second arms 32, 32'). In particular, it can be seen that, on the first 33 and/or on the second connecting rod 33', locations 309, 309' substantially cylindrical can be realized which have characteristics similar to those 327a, 327b, 327'a, 327'b made on the first 32 and/or on the second 32' arm, in particular with a similar relationship between locations 309, 309' and the respective walls 331 , 331 ' of the bottom side 330, 330'. Equally similarly, the side walls 331 , 331 ' of the bottom 330, 331' of the first 33 and/or the second 33' connecting rod may present (in particular in correspondence of the locations 309, 309' as in Figures 9 and 21) through holes 308, 308' for purposes similar to those described in relation to the first 32 and second 32' arm.

Similarly, all the features of the first 32 and/or of the second arm 32' can be extended to the second 33' and/or to the first connecting rod 33, respectively.

In an embodiment not illustrated, the bottom 320, 320' of at least one arm 32, 32' of the articulation device 3 comprises a central band corresponding to the position of the common rotation axis R which extends beyond the first 322, 322' and beyond the second 323, 323' transverse side of the bottom 320, 320' toward the outside of the latter. The section of the peripheral edge created by the side walls 321 , 321 ' of the arm 32, 32' that corresponds to the first 322, 322' and/or the second 323, 323' transverse side of the bottom 320, 320' follows the edge of this central band and stops at the most at one end of said central band distal from the first end 322, 322' and/or from the second 323, 323' transverse side of the bottom 320, 320'.

In Figures 23 to 29, a non-limiting example of the succession of the stages of assembly of the hinge 1 is schematically illustrated. In Figure 23, the insertion into the through holes of the arms 32, 32' (Figure 23 (b)) and any connecting rods 33, 33' (Figure 23 (a)) of the corresponding bushes (preferably made of plastic material) is illustrated, to decrease the friction between the parts and, preferably, at the same time also reduce the clearances between the various components of the articulation device 3. The components of the articulation device 3, in particular the arms 32, 32' (and, if present, the connecting rods 33, 33') are coupled between them and on the connecting bodies 2a, 2b (in particular to the support structure 4a, 4b and/or to movable inserts 5a, 5b and/or to the movable bodies 5a, 5b, 6b most distal from the support structure 4a, 4b. Specifically, as shown in Figure 24, on the first movable body 5a of the first connecting body 2a and the second movable body 6b of the second connecting body 2b) with corresponding pivot pins (Figure 24). In the presence of more or less nested structures, one assembles the movable inserts 5a, 5b and/or movable bodies 5a, 5b, 6b with the respective housing structures (Figures 25-29). In particular, in the embodiment illustrated in the figures, the second movable body 6b of the second connecting body 2b (possibly already provided with its own connection to the articulation device) is inserted into the corresponding first movable body 5b of the connecting body 2a with its own flat flange portions 633 in contact of respective portions of the flat flange 533' of the first movable body 5b of the first connecting body 2b (Figure 25). The second movable body 6b of the second connecting body 2b is then fixed on the respective first movable body 5b by inserting in corresponding holes and/or through housings of the flat flange portions 533', 633 of the fixing means and/or of the adjustment actuators 8' (figure 26, where, in particular, two eccentrics 8' are used for the adjustment along the direction of the width Y2 of the second connecting body 2b). The first movable body 5b of the second connecting body is then inserted in the respective housing structure, i.e. in the support structure 4b of the second connecting body 2b (in particular with its flat flange portions 533' in correspondence with the end parts 41 b of the support structure 4b), and locked therein in position (figure 27, wherein in particular one uses an adjustment actuator 8, for example an eccentric, and a locking screw 8"). One then inserts the first movable body 5a of the first connecting body 2a in the corresponding housing structure, namely the support structure 4a of the first connecting body 2a (Figures 28 or 29). In one case (Figure 28), the adjustment actuators 7 of the position of the first movable body 5a are inserted in the respective grooves 72 of the housing and then one inserts the first movable body 5a in the support structure 4a, engaging the thread of the stem 71 of the actuators 7 with corresponding female threads on the bottom 42a of the support structure 4a (carried out in particular on the proximal portions 411a of the end parts 41a of the support structure 4a). In an alternative case (Figure 29) the actuators 7 (made as threaded pins) are locked for translation on the bottom 42a of the support structure 4a, in particular on the proximal portions 411a of the end parts 41a of the supporting structure 4a, and then the thread of the actuator 7 is engaged on the corresponding nuts produced in the flat flange portions 533 of the first movable body 5a.

In general, also as regards the characteristics of an arm 32, 32' and/or of a connecting rod 33, 33', the continuity between the side and bottom walls does not imply the complete absence of apertures. Without substantially adversely affecting the mechanical seal of said arm 32, 32' and/or connecting rod 33, 33', openings may be provided locally in the junction between the bottom and the peripheral edge and/or on ^' the bottom and/or on the side walls.

The invention realizes important advantages.

Each of the main components of the hinge (support structures of connecting bodies; movable inserts and/or movable bodies; articulation device, particularly each of its components in the form of arms and/or connecting rods) separately has a structure that optimizes the mechanical characteristics and allows the use of a good mechanical strength material of thickness less than those of the known art, with consequent saving of material and costs. Each of these components of the hinge, separately, as shaped from a single metal sheet into a corresponding concave three- dimensional structure and/or specific box-shaped, can be made by the deep drawing technique, possibly assisted by limited bending operations and/or cutting and/or perforation. With these components, hinges can be realized that are obtained (at least in their main parts) in whole or in part by drawing. The use of steel with high mechanical performance in sheets of limited thickness is made possible, with equal weight of the final hinge, allowing to make available a product that combines high performance at a limited cost.

The invention thus conceived is susceptible to numerous modifications and variations, all falling within the inventive concept that characterizes it.

Moreover all details are replaceable with other technically equivalent elements.

In practice, all materials employed, as well as the dimensions, may be any according to the requirements.