DESCRIPTION ITEM OF JEWELLERY

Technical field

This invention relates to an item of jewellery whose aesthetic appearance can be customisable by means of a method for assembly of the item of jewellery which is particularly convenient and/or fast. In this invention, the term “jewellery" is used to mean both “jewellery" and “costume jewellery".

Backaround art

The systems which currently allow the final user to personalise the appearance of an item of jewellery are configured to allow the user to personalise the appearance of the item of jewellery through a process for assembly of the item of jewellery which requires considerable attention and which may easily be very lengthy. Aim of the invention

An item of jewellery according to the invention and/or according to any one of the appended item claims is configured to allow the final user to personalise the appearance of the item of jewellery by means of an assembly method which is particularly convenient and fast. An assembly method according to the invention allows the final user to personalise the appearance of an item of jewellery in a particularly convenient and fast manner.

Brief description of the drawings The characteristics of an item of jewellery and a method according to the invention will emerge more clearly from the following detailed description of respective example embodiments of the item of costume jewellery and the method. The following detailed description refers to the accompanying drawings, in which:

- Figure 1 shows a perspective view of a first possible example embodiment of an item of jewellery according to the invention, in an assembly condition of the item;

- Figure 2 shows the first embodiment of the item without a covering component;

- Figure 3 shows a perspective view of the first item exploded and from above; - Figure 4 shows a perspective view of the first item exploded and from below;

- Figures 5A, 5B and 5C show a cross-section of a part of the first embodiment during respective successive points in time of a possible example embodiment of an assembly method according to the invention; - Figure 6 shows a cross-section of the first embodiment of the item in order to describe a step of inserting a decorative item;

- Figure 7 shows a perspective view of a second possible embodiment of an item of jewellery according to the invention, in a condition of assembly of the item; - Figure 8 shows the second embodiment of the item without a covering component;

- Figures 9 and 10 show a component for locking the second embodiment in a non-operating position and in an operating position, respectively;

- Figures 11 and 12 schematically show a decorative item of the second embodiment at the start and end, respectively, of a possible disengagement movement of the decorative item.

Detailed description of preferred embodiments of the Invention

Figures 1 to 6 refer to a first possible example embodiment of an item of jewellery according to the invention. Figures 7 to 12 refer to a second possible example embodiment of an item of jewellery according to the invention. The term "first item of jewellery" used below means the first possible embodiment of the item of jewellery. The term "second item of jewellery" used below means the second embodiment of the item of jewellery. Hereinafter, the term "item of jewellery”, without the term "first” or “second", means the first embodiment or the second embodiment of the item of jewellery.

Figures 1 to 6 refer to a first possible example embodiment of an assembly method according to the invention. Figures 7 to 12 refer to a second possible example embodiment of an assembly method according to the invention. The term “first method" used below relates to the first possible embodiment of the assembly method. The term "second method" used below relates to the second possible embodiment of the assembly method. Hereinafter, the term "method", without the term “first” or “second", means the first embodiment or the second embodiment of the method. The first method is for the assembly of the first item of jewellery. The second method is for the assembly of the second item of jewellery.

The item of jewellery comprises a plurality of seats 31 and a plurality of decorative items 4. Each seat 31 is configured to stably receive a respective decorative item 4. Each seat 31 can therefore define a respective assembly position of the respective decorative item 4, such that the respective decorative item 4 is inserted in the seat 31.

The item of jewellery 1 or 1' comprises a structure 2. The item of jewellery 1 or 1' is configured so that a user can obtain, by means of at least one reversible movement of said structure 2 relative to said seats 31, an operating position of the structure 2. In Figures 1, 5C and 7 the structure 2 adopts the operating position.

The assembly condition of the decorative item corresponds at least to the operating position of the structure 2.

When the structure 2 adopts the operating position, the structure 2 closes the item of jewellery 1 or 1' at least on one side and prevents the escape or the removal of the decorative items 4 from the respective seats 31. The method comprises a step of preparing the structure 2.

The method comprises a step of obtaining the operating position of the structure 2.

For each seat 31, the assembly position of the respective decorative item 4 corresponds to an occupied condition of the seat 31, such that the respective decorative item 4 is inserted in the respective seat 31.

For each seat 31, the seat 31 may adopt a free condition in which it does not receive any decorative item 4 and/or in which no decorative item 4 is inserted in the seat 31. The item of jewellery 1 is configured so that a user can pass each seat 31 from the respective free condition to the respective occupied condition by inserting a respective decorative item 4 in the respective seat 31.

The item of jewellery 1 or 1' is configured so that a user can pass each seat 31 from the respective occupied condition to the respective free condition by removing the respective decorative item 4 relative to the respective seat 31.

In Figure 1 some seats 31 are in the occupied condition and some seats 31 are in the free condition. In Figures 3 and 4 all the seats 31 are in the free condition since Figures 3 and 4 are exploded views. For clarity, the number of decorative items 4 in Figures 3 and 4 is not equal to the number of seats 31.

It should be noted that, during a normal use of the item of jewellery 1 or 1'. the number of decorative items 4 should be equal to the number of seats 31, and each seat 31 should adopt the respective occupied condition. The method comprises a step of positioning or inserting the plurality of decorative items 4 in the plurality of respective seats 31. Following the positioning step, each decorative item 4 adopts a respective assembly position of the respective decorative item 4.

Starting from a group of decorative items 4, the user can therefore replace each of the decorative items 4 with a further decorative item 4 which was not part of the group and having a different appearance, or exchange a first of the decorative items 4 of the same group with a second of the same group, in such a way that the second adopts an assembly position in the seat 31 previously occupied by the first, and vice versa, so as to vary the appearance of the item of jewellery 1 or 1'. The item of jewellery 1 or 1' comprises a base body 3. The body 3 defines at least a part of each of said seats 31. The body 3 could define completely said seats 31.

The structure 2 comprises a cover 21 .

In Figure 2 the first item of jewellery 1 is shown with the cover 21 removed. The item of jewellery 1 or 1' is configured so that, when the structure 2 adopts the operating position, the cover 21 is mechanically locked relative to said body 3. For this reason, the operating position of the structure 2 corresponds at least to a condition of locking the cover 21 relative to the body 3. The step of obtaining the operating position of the structure 2 comprises obtaining the locking condition of the cover 21 relative to the body 3.

In the first item of jewellery 1, the base body 3 defines a housing 32. The housing 32, in the first item of jewellery 1, is shaped to stably receive a washer 22. In the first item of jewellery, the structure 2 comprises the washer 22. The first item of jewellery 1 is configured so that, in the operating position of the structure 2, the washer 22 adopts a position for inserting in the housing 32. The operating position of the structure 2 corresponds at least also to the position for inserting the washer 22 in the housing 32. The step of obtaining the operating position of the structure 2 comprises a step of mechanically locking the cover 21 relative to the body 3, so as to define the locking condition of the cover 21 relative to the body 3.

In the first method, the step of obtaining the operating position of the structure 2 comprises a step of inserting the washer 22 in the housing 32, so as to define the position for inserting the washer 22 in the housing 32. In the first item of jewellery 1, the housing 32 is in communication with the seats 31 in such a way that, in the inserted position of the washer 22, the washer 22 prevents the escape of the decorative items 4 from the respective seats 31. In that way, the washer 22 can keep in the respective assembly positions all the decorative items 4 which adopt the assembly position, and can therefore keep in the respective conditions occupied all the seats 31 which adopt the occupied condition.

In this way, an item of jewellery is provided which is customisable by selecting the position and the type of a plurality of decorative items, which makes it possible to keep in the assembly position all the decorative items 4 with a fast and easy assembly system even by an unskilled user and/or with poor dexterity, since the washer 22, which is a component that is easy to handle and difficult to accidentally lose, may be used to lock and/or keep all the decorative items 4 in the respective assembly positions. When the cover 21 is locked relative to the body 3, the cover 21 prevents the washer 22 from coming out of the housing 32. In this way, the cover 21 maintains the position in which the washer 22 is inserted in the housing

32.

The body 3 has an annular extension about an axis of the body 3. The axis of the body 3 is labelled X in Figures 3 and 4. The body 3 can be considered to be an annular body 3.

In the first item of jewellery, the housing 32 has an annular extension along the annular extension of the base body 3. The seats 31 are distributed around said axis X of the base body 3. In that way, the washer 22 can effectively keep the decorative items 4 in the respective assembly positions. The housing 32 can be considered to be an annular housing 32. The structure 2 also has an annular extension about an axis of the structure 2. The axis of the structure 2, in Figures 3 and 4, coincides with the axis X of the body 3. The structure 2 may be considered to be an annular structure 2. The cover 21 may be considered to be an annular cover 21. In general, the axis of the structure 2 coincides with the axis X of the body 3 when the structure 2 adopts the operating position.

In general, the axis X, in Figures 3 and 4, can be considered as an axis of the item of jewellery 1 . The item of jewellery 1, when all the decorative items 4 adopt the respective assembly positions, has an annular extension around the axis X.

The cover 21 comprises an upper cover 212 and a lower collar 211. The body 3 defines a collar 33.

The locking condition of the cover 21 relative to the body 3 corresponds at least to a condition of axial mechanical coupling between the collar 33 integral with the body 3 and the collar 211 integral with the cover 21. This axial mechanical coupling is to be considered along the axis X. This axial mechanical coupling is to be considered a coupling which opposes or prevents the translation of the cover 21 relative to the body 3 along the axis X.

The obtaining of the locking condition of the cover 21 comprises obtaining the axial mechanical coupling between the collar 33 integral with the body 3 and the collar 211 integral with the cover 21.

In the first item of jewellery 1, the locking condition of the cover 21 relative to the body 3 corresponds at least also to a condition of angular mechanical coupling between a locking pin 34 and a hole 21a. The locking pin 34 and the hole 21a are integral one with the cover 21 and the other with the body 3, or vice versa. This angular mechanical coupling is to be considered about the axis X. This angular mechanical coupling is to be considered as a coupling which opposes or blocks the rotation of the cover 21 relative to the body about the axis X. This angular coupling is obtained by inserting the pin 34 into the hole 21a.

The collar 33 of the body 3 is positioned along the annular extension of the housing 32. The collar 33 delimits the housing 32. The locking condition of the cover 21 comprises obtaining the angular mechanical coupling between the locking pin 34 and the hole 21a. In that way, the item of jewellery 1 is configured so that the cover 21 can be locked in said locking condition relative to the body 3, whilst said washer 22 adopts said inserted position in said housing 32, by means of a bayonet motion of the cover 21 relative to the body 3.ln the first item of jewellery, the above-mentioned movement of the structure 2, by which the operating position of the structure 2 can be obtained, therefore comprises, in sequence, at least one motion for inserting said washer 22 in said housing 32, and said bayonet motion of the cover 21 relative to the body

3. This bayonet motion comprises an axial translational motion of the cover 21 relative to the body 3, during which at least one protrusion 211a made in the collar 211 of the cover 21 passes through at least one recess 33a formed in the collar 33 of the body 3.

In the first item of jewellery, the bayonet motion comprises a rotary motion between the cover 21 and the body 3, after which the locking pin 34 inserts in the hole 21a, in such a way as to define the locking condition of the cover 21 relative to the body 3.

The translational motion is to be considered along the axis X. This rotational motion is to be considered about the axis X. Figures 3 and 4 show a second protrusion 211b integral with the collar 211 of the cover 21 and a second recess 33b integral with the collar 33 of the body 3. During this translational movement, the second protrusion 211b passes through the second recess 33b.

To facilitate insertion of the locking pin 34 into the hole 21a, the body 3 may have a spring 34a interposed between the body 3 and the pin 34, which promotes the insertion of the pin 34 into the hole 21a. The insertion of the pin 34 in the hole 21a is shown in Figures 5A, 5B, and 5C.

The step of obtaining the locking condition of the cover 21 relative to the body 3 is therefore easy to understand by the user also in relation to the annular shape of the item of jewellery.

In this way, an item of jewellery is provided which is customisable by selecting the position and the type of a plurality of decorative items, which allows the user to assemble the item of jewellery with a very intuitive method.

Each decorative item 4 comprises a respective decorative head 41. The decorative head 41 defines a first end of the decorative item 4. Each decorative item 4 comprises a respective locking head 43. The locking head 43 forms a second end of the decorative item 4. The second end is opposite the first end. Each decorative item 4 comprises a shank 42. The shank 42 of each decorative item 4 is structurally interposed between the respective decorative head 41 and the locking head 43. For each decorative item 4, the respective decorative head 41 and the locking head 43 form between them a respective recess 421 which is situated on the respective shank 42. For each decorative item 4, the respective decorative head 41 and locking head 43 define respective structural widenings relative to the respective shank 42, in such a way as to define the respective recess 421. In Figure 6, the definition of the respective recess 421 by the decorative head 41 and the locking head 43 is clearly visible within the locking element 4 positioned further to the right. The decorative item 4 positioned further to the right in Figure 6 adopts a non-assembly position relative to the respective seat 31, in which the decorative item 4 is removed from the respective seat 31. The decorative item 4 positioned further to the left in Figure 6 adopts the respective assembly position in the respective seat 31, in which the decorative item 4 is inserted in the respective seat 31. For each decorative item 4, when the respective decorative item 4 adopts the respective assembly position, the outer surface of the decorative head 41 facing away from the locking head 43 defines a respective part of the outer surface of the item of jewellery 1, in such a way as to contribute to the appearance of the item of jewellery 1. Substantially, in the assembly position of the decorative item 4, the contribution of the decorative item 4 to the appearance of the item of jewellery 1 is defined by the decorative head 41.

The first item of jewellery 1 is configured so that, in said operating position, the washer 22 is positioned in all the recesses 421 defined by the decorative items 4 which adopt the respective assembly positions, so as to maintain the respective assembly position of each decorative item 4 which adopts the respective assembly position.

When it adopts the inserted position in the housing 32, the washer 22 is practically positioned, for each decorative item 4 which adopts the assembly position, between the decorative head 41 and the locking head 43 of the decorative item 4. In that way, the contact between the locking head 43 and the washer 22 may oppose any external action tending to remove the decorative item 4 from the seat 31 and, therefore, to lose the assembly position 4.

The seats are distributed one after another along the annular extension of the base body 3. The seats 31 are distributed around the axis X of the base body 3.

Each of the seats 31 is oriented at least mainly radially relative to said axis X, in such a way that a user can position each decorative item 4 in the respective assembly position by means of a movement at least mainly radial of the decorative item 4 relative to the axis X. This movement at least mainly radial occurs for example along the direction Y of Figure 6. The direction Y is to be considered as a radial direction relative to the axis X of the body 3.

Each of the seats 31 might be oriented radially relative to said axis X, in such a way that the movement of the decorative item 4 is radial.

The washer 22 has an end narrowing 221. The item of jewellery 1 is configured so that, in the inserted position of the washer 22 in the housing 32, the narrowing 221 of the washer 22 is positioned with clearance in all the recesses 421 defined by the decorative items 4 which adopt the assembly position. The item of jewellery 1 is configured so that, in said inserted position of the washer 22 in the housing 32, there is clearance between the washer 22 and the housing 32.

In that way, any insertion of a decorative item 4 in a respective seat 31, as could be, for example, the decorative item 4 positioned more to the right in Figure 6, can also be performed whilst the washer 22 adopts the insertion position. In effect, thanks to this clearance between the washer 22 and the housing 32, the washer 22 can be lifted by the effect of the contact resulting from the operation of inserting the decorative item 4 in the respective seat 31, in such a way that, after the complete insertion, the locking head 43 of the decorative item 4 is correctly beyond the washer 22 in such a way as to lock the decorative item 4 in the assembly position.

For this reason, not all the decorative items 4 need be inserted before inserting the washer 22 which locks the decorative items in the assembly positions, but the decorative items can also be inserted when the washer 22 is already in the inserted position in the housing 32, so as to reduce the risk of escape of the decorative items 4 already positioned in the respective assembly positions, during the positioning of the successive decorative items 4.

In this way, an item of jewellery is provided which can be customisable by selecting the position and the type of a plurality of decorative items, which allows the user to assemble all the decorative items 4 even after the mechanical system which locks the decorative items in the respective assembly positions has already been assembled.

For each decorative item 4, the locking head 43 has an end narrowing 431 to facilitate the sliding of the decorative item 4 in contact with the washer 22, during the operation for inserting the decorative item 4 in the seat 31, by means of which contact sliding the washer 22 can be moved so as to allow the insertion of the decorative item 4 even when the washer 22 adopts the position for inserting in the housing 32.

The item of jewellery therefore allows the user to quickly obtain the appearance produced by the item of jewellery by means of a selection determined by the user both in terms of type and positioning of each decorative item 4 used.

The clearance between the narrowing 221 and the recess 421 of the decorative item 4 is used to prevent the washer 22 from jamming in the recess when the locking head 43 passes beyond the washer 22 in the last step of the operation for inserting the decorative item 4 in the seat 31.

The item of jewellery 1 could be a ring or a pendant or a bracelet or a wristband or an earring.

In the second item of jewellery 1 the base body 3 defines a plurality of housings 32' and said structure 2 comprises a plurality of pins 22'. In the second item of jewellery 1 the structure 2 comprises a plurality of pins

22'.

In the second item of jewellery 1 each of said housings 32' is shaped to stably receive a respective pin 22' and to guide a movement of the respective pin 22' between a non-operating position and an operating position.

Figure 8 indicates all the housings 32'. Figure 7 and Figure 8 show, for clarity, only one pin 22'. In Figures 7 and 8 the pin 22' adopts the operating position.

In Figure 9 the pin 22' adopts the operating position. In Figures 10, 11 and 12, the pin 22' adopts the non-operating position.

In the second item of jewellery 1', the operating position of the structure 2 corresponds to the operating position of all the pins 22'.

In the second item of jewellery 1', each of said housings 32' is in communication with a respective seat 31' in such a way that, in the operating position of the respective pin 22', the pin 22' prevents the escape of the respective decorative item 4 from the respective seat 31', in such a way as to maintain the respective assembly position of the respective decorative item 4 which adopts the respective mounting position. In the second item of jewellery 1', each of said pins 22' comprises a respective narrow portion 221' and a respective wide portion 222'. The second item of jewellery 1' is configured so that each pin 22', in the respective operating position, is positioned with the wide portion 222' in the respective recess 421 of the respective decorative item 4, in such a way that the contact between the locking head 43 and the wide portion 222' of each of the decorative items 4 assembled can oppose an action tending to release the decorative item from the seat 31, in such a way that each pin 22' can maintain the respective position for assembling the respective decorative item 4 which adopts the respective assembly position. The second item of jewellery 1' is configured so that each pin 22', in the respective non-operating position, is positioned with the narrow portion 221' positioned in front of the respective recess of the respective decorative item 4, and with the respective wide portion 222' outside the respective recess 421, in such a way that the pin 22' allows the removal of the respective decorative item 4 from the respective seat 31 . For example, Figures 11 and 12 show how the positioning of the pin 22' in the nonoperating position allows the passage of the decorative item 4 from the inserted position in the seat, which corresponds to the assembly position of the decorative item 4 and to which Figure 11 refers, to the position of disengagement with respect to the seat, which corresponds to the position of non-assembly of the decorative item 4 and to which Figure 12 refers. Figures 11 and 12 show only the decorative item 4 and the pin 22' for reasons of clarity.

The second item of jewellery 1 comprises, for each pin 22', an elastic element 223' which strikes and/or pushes the respective pin 22' towards the respective operating position, and keep the respective pin 22' in the respective operating position. For each pin 22', the respective elastic element 223' elasticises the movement of the respective pin 22' between the non-operating position of the pin 22' and the working position of the pin 22'.

Each pin 22' is connected to the body 3 by the respective elastic element 223'.

The second item of jewellery 1' is configured so that a user can pass each pin 22' from the respective operating position to the respective nonoperating position acting in opposition to the respective elastic element 223'.

In the second item of jewellery 1', the housings 32' of the base body 3 are distributed around said axis X of the base body 3.

In the second item of jewellery 1 the cover 21 comprises a plurality of holes 21 a'. The locking condition corresponds to a condition of axial mechanical coupling, along said axis X, between the collar 33 integral with the body 3 and a collar 211 integral with the cover 21, and an angular mechanical coupling condition, around said axis X, between each pin 22' and a respective one of said holes 21a'. The term "axial mechanical coupling" is used to mean a coupling which opposes or prevents the relative translation between the cover 21 and the base body 3 along the axis X. The term "angular coupling" is used to mean a coupling which opposes or prevents the relative rotation between the cover 21 and the body 3 about the axis X. This angular mechanical coupling is accomplished by inserting each pin 22' into the respective hole 21 a' of the cover 21 .

The second item of jewellery 1' is configured so that said cover 21 can be locked in said locked condition, whilst each of said pins 22' adopts the respective operating position, by means of a bayonet motion of said cover 21 relative to said body 3. The bayonet motion causes each pin 22' to be inserted in a respective hole 21 a' of the cover 21 .

In this way, an item of jewellery is provided which is customisable by selecting the position and the type of a plurality of decorative items, which allows the user to assemble the item of jewellery with a very intuitive procedure and by which it prevents the user from losing the components necessary for the assembly, since the pins 22' are connected to the body

3. In order to make each pin 22' pass from the operating position to the nonoperating position, in order to insert the respective decorative item 4' in the respective seat 31 a user may act through the respective hole 21a' of the cover 21, so as to push the pin 22' from the operating position to the non- operating position in opposition to the elastic element 223'.

The movement of the structure 2, in the second item of jewellery 1', therefore comprises an oscillation of each of one or more pins 22' between the respective operating position and non-operating position and said bayonet motion. More specifically, for each pin 22' associated with a seat 31 in which a respective decorative item 4 is to be inserted, the user moves from the respective operating position to the respective non-operating position. After the decorative item 4 has been inserted into the seat 31, the pin 22' returns to the respective operating position under the influence of the respective elastic element 223'. For this reason, the movement of the structure 2 comprises at least one oscillation of one or more pins 22' between the respective operating position and non-operating position. Subsequently, the user causes the bayonet motion, which is such that each pin 22 inserts into a respective hole 21a' by means of another oscillation between the respective operating position and non-operating position.

According to an aspect of the invention, another embodiment of the item of jewellery is provided, with particular reference to further methods of locking the decorative items on the body of the item of jewellery. The cover 21 includes a flange 21" and an outer lateral surface 22". According to an embodiment, the flange 21" comprises a radial portion 21 R" and an axial position 21A". The radial portion 21 R" extends along a surface perpendicular to the axis X whilst the axial surface 21A" is a cylindrical surface which extends along the axis X starting from the outer edge of the radial surface 21 R". It should be noted that some embodiments comprise only the radial portion 21 R". According to an embodiment, the cover 21 comprises a hooking recess IA. According to an embodiment, the base body 3 comprises a hooking tooth

DA.

The hooking recess IA is configured to house the hooking tooth DA, for locking the axial movement of the cover 21 relative to the base body 3. In particular, according to an embodiment, the cover 21 is inserted by pressure along the axis X towards the base body 3, until the stopping tooth is positioned in the hooking recess IA.

The base body 3 comprises an outer cylindrical surface 311 " and an inner cylindrical surface 312", opposite the outer cylindrical surface 311" and spaced to define a thickness of the base body 3.

According to a first embodiment, the coupling recess IA is made on the axial surface 21A" of the flange, in particular in a surface of it facing towards the axis X. According to this embodiment, the hooking tooth DA is positioned on the outer cylindrical surface 311". For this reason, when the cover 21 is pushed towards the base body 3, the hooking tooth DA is inserted between the outer lateral surface 22" and the axial portion 21A" of the flange 21", it is deformed plastically and then elastically returned into the hooking recess IA to define an axial constraint between the base body 3 and the cover 21 .

According to a second embodiment, the hooking recess is made on the outer lateral surface 22". According to this embodiment, the hooking tooth DA is positioned on the inner cylindrical surface 312" and projects towards the axis X. In this way, when the cover 21 is pushed towards the base body 3, the hooking tooth DA rubs on the cylindrical surface 312", deforming, until it encounters the hooking recess IA and returns elastically to its initial position, inserting in the hooking recess IA, defining an axial constraint between the base body 3 and the cover 21.

The latter embodiment allows elimination of the axial portion 21A" of the flange 21" improving the appearance of the product and its convenience, since on the annular surface of the item of jewellery there are no raised elements other than the decorative items, the aesthetic appearance of which is therefore accentuated.

According to said embodiment, the base body 3 and the cover 21 can move between a locked position PB1 and an unlocked position PB2. In the locked position PB1, the base body 3 and the cover 21 are connected to each other both when translating along the axis X and when rotating about the axis X. In the unlocked position PB2, the base body 3 and the cover 21 are constrained to each other by translation along the axis X but rotate relative to each other about the axis X. In other words, the cover 21, in the unlocked position PB2, rotates relative to the base body 3 to vary its angular position.

The cover 21 comprises a cylindrical wall 22P, the outer surface of which defines the outer lateral surface 22". Said cylindrical wall 22P extends along the axis of the item of jewellery and is inserted, in the assembled configuration of the item of jewellery, inside the base body 3.

In particular, according to a preferred embodiment, said cylindrical wall 22P comprises a locking end 22P'. Said locking end 22P' extends over the entire circumference of the ring, to intercept each hole, in which the decorative items are inserted. In particular, said locking end 22P' is aligned, along each (radial) axis of insertion of the decorative item in the hole, with the corresponding hole.

According to an embodiment, the locking end 22P' makes contact, along the axis X, with a contact surface 313" of the base body, which is oriented perpendicularly to the axis X and defines, preferably, a circular crown. Said locking end 22P' comprises a recess RC, at which the locking end 22P' is withdrawn, along the axial direction, relative to the other circumferential zones of the locking end 22P'. In other words, at the recess, the locking end 22P' is aligned along each (radial) axis of insertion of the decorative item in the hole, with the corresponding hole. This recess RC is configured to allow an insertion and a removal of each decorative item from the base body 3, as described below. As described above, the cover 21 rotates relative to the base body 3. Said rotation makes it possible to change an angular position of the recess RC. This variation in position substantially makes it possible to move the recess to the multiplicity of circumferential positions in which the decorative items are positioned.

In particular, starting from a position without the decorative item, the cover 21 is rotated to said position without the decorative item, in such a way that the locking end 22P' does not interfere with a decorative item inserted in the corresponding hole. After the decorative item has been inserted, the cover 21 is rotated to a circumferential neutral position, that is to say, in which the recess RC is not aligned with any hole for receiving the decorative items. This is to ensure that the decorative items are not accidently released.

The rotation of the cover 21 in a circumferential neutral position causes the locking end 22P' to align with the hole in which the decorative item has just been inserted, blocking said decorative item by mechanical interference. In particular, each decorative item has a respective locking recess in which the locking end 22P' of the cover 21 engages to stop a movement along the axis of the corresponding hole. Vice versa, if, on the other hand, it is necessary to remove, for example for replacing, a decorative item, it will be sufficient to return the recess RC to the circumferential position corresponding to the hole of the decorative item to be removed. This alignment removes the mechanical interference between the decorative item and the locking end 22P', allowing removal of the decorative item. According to an embodiment, the item of jewellery 1 comprises a locking element. The locking item is movable between a locked position, wherein the base body 3 and the cover 21 are in the locked position PB1, and a rotation position, wherein the base body 3 and the cover 21 are rotatable about the axis X (they are in the unlocked position PB2). At the moment of replacement of the items of jewellery, the user positions the locking element in the rotating position, positions the recess RC in the desired circumferential position, removes and replaces the decorative item, again rotates the cover 21 to the circumferential neutral position and returns the locking element to the locking position, in such a way as to prevent rotations of the cover 21 which could cause an escape of the decorative items from the respective holes.

According to a non-limiting example embodiment, the locking element is a pin which extends along a direction parallel to the axis X inside a corresponding housing hole. The housing hole extends, starting from the cover 21, to the base body 3. The pin is movable along the axis X between an interfering position and a non-interfering position. In the interference position, the pin is housed in the housing hole partly in the cover 21 and partly in the base body 3. This causes the pin to stop the reciprocal rotation between the cover 21 and the base body 3, since it reacts to an attempt at rotation and is subjected to a shear force. In the non- interference position, the pin is housed in the housing hole only in the portion of the housing hole in the cover 21. For this reason, in that case, since it is not inserted in the base body 3, the pin does not receive any shear force but rotates, together with the cover 21, relative to the base body 3.