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Title:
SKI BOOT
Document Type and Number:
WIPO Patent Application WO/2019/202503
Kind Code:
A1
Abstract:
A ski boot (1) comprising: a substantially rigid foot-casing (2) which is adapted to accommodate the foot of the user; a substantially rigid cuff (3) which is adapted to enclose the lower part of the leg of the user, and pivotally joined to the foot-casing (2) so as to be able to rotate about a reference axis (A) substantially perpendicular to the midplane of the ski boot; and a manually-operated cuff locking device (15) which comprises: a support plate (16) placed on the cuff (3), above the heel of the ski boot (1); a movable arm (17) which is butt hinged onto the support plate (16) so as to be able to rotate to and from a locking position wherein the movable arm (17) extends downwards and couples in a releasable manner to the foot-casing (2) beneath; and an elastic counteracting member (18) which is adapted to bring and maintain, in an elastic manner, the movable arm (17) into said locking position; the head of the movable arm (17) being additionally fastened to the support plate (16) with the capability of sliding on the support plate (16) in a first direction (d) which is substantially parallel to the laying- and rotation- plane of the movable arm (17) and locally substantially tangent to the surface of the cuff (3); and the elastic counteracting member (18) being also adapted to counteract in an elastic manner the sliding of the movable arm (17) on the support plate (16).

Inventors:
PARISOTTO, Davide (Asolo, 31011, IT)
COLLA, Giulio (Asolo, 31011, IT)
Application Number:
IB2019/053131
Publication Date:
October 24, 2019
Filing Date:
April 16, 2019
Export Citation:
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Assignee:
CALZATURIFICIO S.C.A.R.P.A. S.P.A. (Viale Enrico Fermi 1, Asolo, 31011, IT)
International Classes:
A43B5/04
Foreign References:
EP3292778A12018-03-14
US4519149A1985-05-28
Attorney, Agent or Firm:
BELLEMO, Matteo et al. (Via Viotti 9, Torino, 10121, IT)
Download PDF:
Claims:
CLAIMS

1. A ski boot (1) comprising: a substantially rigid foot casing (2) which is adapted to accommodate the foot of the user and has the lower part structured so as to be able to couple with a ski binding device; a substantially rigid cuff (3) which is adapted to enclose the lower part of the leg of the user, and pivotally joined to the foot-casing (2) so as to be able to rotate about a reference axis (A) substantially perpendicular to the midplane of the ski boot; and a manually-operated cuff locking device (15) which is adapted to selectively lock the cuff (3) to the foot-casing (2) in a predetermined downhill position;

the cuff locking device (15) comprising: a support plate (16) placed on the cuff (3), above the heel of the ski boot (1); a movable arm (17) which is butt hinged onto the support plate (16) so as to be able to rotate to and from a locking position wherein the movable arm (17) extends downwards and couples in releasable manner to the foot-casing (2) beneath; and an elastic counteracting member (18) which is adapted to bring and maintain, in elastic manner, the movable arm (17) into said locking position;

the ski boot (1) being characterised in that the head of the movable arm (17) is additionally fixed onto the support plate (16) with the capability of sliding on the support plate (16) in a first direction (d) which is substantially parallel to the laying- and rotation- plane of the movable arm (17) and locally substantially tangent to the surface of the cuff (3) ; and in that the elastic counteracting member (18) is also adapted to counteract in elastic manner the sliding of the movable arm (17) on the support plate (16) .

2 . Ski boot according to claim 1, wherein the elastic counteracting member (18) is adapted to exert, onto the movable arm (17), an elastic force (f) that tends to place the head of the movable arm (17) in a predetermined point of its stroke on the support plate (16) .

3 . Ski boot according to claim 2, wherein the movable arm (17) is adapted to place the cuff (3) in said downhill position when the head of the movable arm (17) is in said predetermined point of its stroke on the support plate (16) .

4 . Ski boot according to claim 1, 2 or 3, wherein the head of the movable arm (17) is hinged on the support plate (16) via a transversal pin (20) which is substantially perpendicular to the laying- and rotation- plane of the movable arm (17), and engages in free axially sliding and rotating manner a pair of guide slotted holes (21) that extend on the support plate (16) in said first direction (d) , on opposite sides of the head of the movable arm (17) .

5 . Ski boot according to claim 4, wherein the guide slotted holes (21) are substantially rectilinear.

6. Ski boot according to claim 4 or 5, wherein the support plate (16) is provided with two protruding wings (23) substantially parallel and facing each other, which extend cantilevered from the outer surface of the cuff (3), on opposite sides of the head of the movable arm (17), while remaining locally substantially perpendicular to the outer surface of the cuff (3) and parallel to the midplane of the ski boot; the guide slotted holes (21) being made on said protruding wings (23) .

7 . Ski boot according to claim 4, 5 or 6, wherein the elastic counteracting member (18) is adapted to exert, on said transversal pin (20), an elastic force (f) which is directed substantially along said first direction (d) and is adapted to push and maintain, in elastic manner, the transversal pin (20) in abutment against an end of said guide slotted holes (21) .

8. Ski boot according to the claim 4, 5, 6 or 7, wherein the elastic counteracting member (18) comprises: a transversal hub (27) which is fitted onto said transversal pin (20) and is angularly integral to the head of the movable arm (17) so as to be able to rotate together with the latter; and a push assembly (28) which is located on the support plate (16) beside the transversal hub (27), and is arranged in sliding/rolling abutment on the outer periphery of the transversal hub (27), so as to be able to push the transversal hub (27) in elastic manner in said first direction (d) .

9 . Ski boot according to claim 8, wherein the periphery of the transversal hub (27) has a cam profile, and the push assembly (28) interacts with the periphery of the transversal hub (27) so as to generate an elastic torque that tends to bring and hold the transversal hub (27) in a first angular position of stable equilibrium wherein the transversal hub (27) places the movable arm (17) in said locking position.

10. Ski boot according to claim 9, wherein the push assembly (28) interacts with the periphery of the transversal hub (27) so as to generate an elastic torque that tends to bring and hold the transversal hub (27) also in a second angular position of stable equilibrium wherein the transversal hub (27) is rotated upwards, in respect to the first angular position of stable equilibrium, by a predetermined angle greater than 120°.

11. Ski boot according to claim 8, 9 or 10, wherein the push assembly (28) comprises: a telescopic stem (30) which extends in said first direction (d) while remaining coaxial to a longitudinal axis (L) that intersects the rotation axis (B) of the transversal pin (20), and has a first axial end fixed in rigid manner onto the support plate (16), and a second axial end (31) arranged in sliding abutment onto the periphery of the transversal hub (27); and an elastic counteracting element (32) which acts on the telescopic stem (30) so as to strongly push the second axial end (31) of the telescopic stem (30) in abutment against the periphery of the transversal hub (27) .

12. Ski boot according to claim 11, wherein said elastic counteracting element (32) is fitted onto the telescopic stem ( 30 ) .

13. Ski boot according to any one of the preceding claims, wherein the head of the movable arm (17) is substantially fork-shaped .

14 . Ski boot according to claim 13, wherein the elastic counteracting member (18) is arranged between the two prongs of the head of the movable arm (17) .

15 . Ski boot according to any one of the preceding claims, wherein the movable arm (17), in the locking position, extends downwards so as to place its distal end (17a) in abutment against an anchoring structure (19) which is located on the foot-casing (2) spaced below the cuff locking device (15); the distal end (17a) of the movable arm (17) being structured so as to be able to be coupled/fastened on said anchoring structure (19) .

Description:
A SKI BOOT

CROSS-REFERENCE TO RELATED APPLICATIONS

This Patent Application claims priority from Italian Patent Application No. 102018000004557 filed on April 16, 2018, the entire disclosure of which is incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to a ski boot.

More in detail, the present invention relates to a ski mountaineering or Telemark ski boot. Ski boots to which the following disclosure specifically refers without however losing in generality.

BACKGROUND ART

As is known, the ski mountaineering boots traditionally comprise: a substantially shoe-shaped rigid foot-casing, which is structured to accommodate the user's foot and has the bottom part specifically structured to be fastened to the deck of a downhill ski or the like by means of a specific ski binding device; a rigid cuff, which is shaped so as to embrace the lower section of the user's leg from behind, and is hinged to the upper part of the foot-casing so as to rotate about a transversal reference axis which is substantially perpendicular to the vertical midplane of the ski boot, and is moreover locally substantially coincident with the articulation axis of the ankle; and a protective inner boot made of a soft and thermal-insulating material, which is removably inserted into the foot-casing and the cuff, and is shaped so as to accommodate and protect the foot and the lower part of the user's leg, roughly up to the height of the calf.

The abovementioned ski boots are additionally provided with a foot-casing closing mechanism and with a cuff closing mechanism, both manually operated.

Lastly, the ski mountaineering boots are provided with a manually-operated cuff locking device that is traditional ly located in the area of the ski boot above the heel, and is structured so as to selectively and alternatively

- rigidly lock the cuff to the foot-casing in a predetermined downhill position in which the cuff is tilted forward with respect to the vertical by a predetermined angle; or

- completely release the cuff from the shell so as to allow the cuff to freely swing forward and backward on and with respect to the foot-casing.

Unfortunately, the dynamic behaviour of the cuff locking device does not meet the requirements of some users that would like to allow the cuff to make small movements/ swings (no more than a few degrees) even when the cuff is locked in the downhill position, so as to at least partially facilitate the typical movements of the ankle during downhill skiing .

DISCLOSURE OF INVENTION

Aim of the present invention is to produce a cuff locking device adapted to rigidly lock the cuff to the foot casing in the downhill position, while anyway allowing the cuff to make small movements with respect to the pre-set tilt .

In compliance with these aims, according to the present invention there is provided a ski boot as defined in Claim 1 and preferably, though not necessarily, in any one of the dependent claims .

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be described with reference to the accompanying drawings, illustrating a non limiting embodiment thereof, in which:

- Figure 1 is a perspective view of a ski boot realized according to the teachings of the present invention, with parts removed for the sake of clarity;

- Figures 2 and 3 are two enlarged-scale side views of the rear part of the ski boot shown in Figure 1 in the configuration with locked cuff, sectioned along the midplane of the ski boot and with parts removed for the sake of clarity; whereas

Figure 4 is an enlarged-scale side view of the rear part of the ski boot shown in Figure 1 in the configuration with unlocked cuff, sectioned along the midplane of the ski boot and with parts removed for the sake of clarity.

BEST MODE FOR CARRYING OUT THE INVENTION

With reference to Figure 1, number 1 denoted as a whole a ski boot that can advantageously be used for practising ski mountaineering or Telemark skiing.

The ski boot 1 basically comprises: a substantially rigid foot-casing 2 which is substantially in the shape of a shoe, is adapted to accommodate the foot of the user, and preferably has the lower part specifically structured/shaped to couple/ fasten in a rigid and stable, though easily releasable manner, with a ski binding device (not shown) of a known kind that is, in turn, adapted to be rigidly secured to the back of a generic downhill ski or the like; and a substantially rigid cuff 3, which is shaped so as to surround the lower part of the user's leg, and is hinged on the foot casing 2 so as to freely rotate about a transversal reference axis A that is locally substantially perpendicular to the vertical midplane of the ski boot and also substantially coincident with the articulation axis of the user's ankle.

More in detail, the lower part of foot-casing 2 is preferably provided with a front tip 4 and a rear heel 5.

The front tip 4 is preferably structured so as to be able to couple/fasten in a stable, though easily releasable manner, to the toe piece (not shown) of a ski binding device which, in turn, is stably secured to the back of the downhill ski or the like. The rear heel 5, on the other hand, is preferably structured so as to be able to couple/ fasten in a stable, though easily releasable manner, to the heel piece (not shown) of the same ski binding device that, in turn, is stably secured to the back of the downhill ski or the like.

In even more detail, the front tip 4 of foot-casing 2 is preferably structured so as to couple/fasten in a known manner with the toe piece of a ski mountaineering binding device; whereas the rear heel 5 of foot-casing 2 is preferably structured so as to couple/fasten in a known manner with the heel piece of the same ski mountaineering binding device.

Moreover, the profile of the lower part of foot-casing 2 preferably has a treaded profile so as to grip on snow and/or ice, and thus allowing the user to walk on snow and ice in relative safety.

More in detail, with reference to Figure 1, the foot casing 2 preferably comprises: a substantially oblong basin shaped rigid shell 6 which is preferably made of plastic and/or composite material, and is shaped so as to accommodate and enclose the foot of the user preferably roughly up to the height of the ankle; and optionally a bottom sole 7 preferably with a treaded profile, which is preferably made of vulcanized rubber or other elastomeric material with a high coefficient of friction, and is firmly secured to the bottom wall of shell 6 preferably by gluing.

Preferably, though not necessarily, the foot-casing 2 additionally comprises a rigid insert 8 which is preferably made of metal material, has a substantially plate-like structure and is stably embedded/incorporated in the bottom wall of rigid shell 6 roughly at the tip 4 of the foot-casing 2.

Furthermore, the rigid insert 8 is dimensioned so as to emerge/ surface on the outside of shell 6 on opposite sides of the front tip 4 of foot-casing 2, preferably in a substantially specular position with respect to the midplane of the ski boot, so that the two distal ends of rigid insert 8 can couple in axially rotatable manner with the toe piece of the ski mountaineering binding device.

With reference to Figure 1, on the other hand the cuff 3 preferably comprises a rigid shell 9 made of plastic and/or composite material, which is substantially C-bent so as to cover the rear part of the user's leg, from the ankle substantially up to the height of the calf, and is moreover provided with two oblong lateral flaps (not shown in the figures) that extend forwards on opposite sides of the midplane of the ski boot, in order to embrace the user's leg from behind roughly at the height of the calf, and preferably then superimpose to one another at the front of the leg, to form a tubular structure that surrounds the user's leg at the height of the calf.

Moreover, the cuff 3 is preferably fixed in free rotatable manner to the upper part of foot-casing 2, or rather of rigid shell 6, by means of two connecting hinges 10 preferably made of metal material, which are arranged on the inner and outer lateral sides of foot-casing 2 and of cuff 3, aligned along transversal axis A, so as to allow the cuff 3 to freely swing forwards and backwards on foot-casing 2, while remaining always on a reference plane orthogonal to axis A and substantially coincident with the midplane of the ski boot .

With reference to Figure 1, the ski boot 1 preferably additionally comprises a preferably substantially shoe- or boot- shaped, protective inner boot 11 which is inserted inside foot-casing 2 and cuff 3 preferably in a manually removable manner, and has a soft and thermal-insulating structure shaped so as to accommodate and protect the foot and optionally also the lower part of the leg of the user.

More in detail, in the example shown, the inner boot 11 is preferably shaped substantially like a boot so as to accommodate, cover and protect the user's foot and the lower part of the user's leg, roughly up to the top of the calf. Preferably the inner boot 11 moreover has a thermoformable structure .

Additionally, the ski boot 1 is moreover provided with a foot-casing closing mechanism 12 and/or with a cuff closing mechanism 13, both preferably operated manually.

The foot-casing closing mechanism 12 is structured so as to be able to selectively close/tighten the foot-casing 2 against the user's foot, thus to immobilise the user's foot inside the foot-casing 2, or rather inside the inner boot 11. The cuff closing mechanism 13, on the other hand, is structured so as to be able to selectively close/tighten the upper part of cuff 3 against the user's leg, thus to immobilise the user's leg inside the cuff 3, or rather inside the inner boot 11.

Foot-casing closing mechanism 12 and cuff closing mechanism 13 are devices already widely known in the ski- boot industry, and therefore won't be further described.

With reference to Figures 1, 2, 3 and 4, the ski boot 1 is finally provided with a manually-operated cuff locking device 15 which is structured so as to be able to selectively lock the cuff 3 to the foot-casing 2 in a predetermined downhill position in which the cuff 3 is tilted with respect to the vertical by a given angle preferably of less than 25°, while allowing at same time the cuff 3 to make small swings about the same downhill position. More in detail, the cuff locking device 15 is preferably fixed to the cuff 3 in the area of the ski boot above the heel, substantially astride the midplane of the ski boot, and is structured so as to selectively and alternatively:

- connect the cuff 3 to the foot-casing 2 so as to lock the cuff 3 in said downhill position, while still allowing the cuff 3 to move/swing by a few degrees about the downhill position; and

- completely unlock/release the cuff 3 from the foot casing 2 so as to allow the cuff 3 to freely swing forward and backward on the foot-casing 2 about the transversal axis A, while remaining on the midplane of the ski boot .

Preferably the cuff locking device 15 is moreover structured to oppose in elastic manner to the small swings of cuff 3 about the abovementioned downhill position.

More specifically, in the downhill position, the cuff 3 is preferably tilted forward with respect to the vertical by an angle ranging between 3° and 20°.

The small swings about the downhill position, on the other hand, have a maximum width preferably lower than 5°.

With reference to Figures 1, 2, 3 and 4, the cuff locking device 15 in particular comprises: a support plate 16 preferably oblong in shape, which is preferably made of metal material, and is rigidly fixed to the cuff 3, above the heel of the ski boot 1 and substantially astride the midplane of the ski boot; a rigid and oblong movable arm 17 that is preferably made of metal material, and is butt hinged to support plate 16 so as to be able to freely rotate with respect to the latter, substantially parallel to the midplane of the ski boot (i.e. while remaining on a laying plane locally substantially parallel to, and preferably also coincident with, the midplane of the ski boot), to and from a lowered or locking position (see Figures 1, 2 and 3) wherein the movable arm 17 extends downwards, preferably substantially skimmed over the outer surface of cuff 3, and couples in a rigid and stable, though easily releasable manner to the foot-casing 2 beneath; and finally an elastic counteracting member 18 which is structured so as to bring and maintain in elastic manner the movable arm 17 into the abovementioned lowered or locking position.

More specifically, in the lowered or locking position, the movable arm 17 preferably extends downwards so as to arrange its distal end 17a in abutment against an anchoring structure 19, which is stably located on foot-casing 2, or rather on rigid shell 6, spaced below the cuff locking device 15, substantially astride the laying- and rotation- plane of arm 17, i.e. on the midplane of the ski boot and roughly at the heel of the ski boot .

The distal end 17a of movable arm 17 is preferably structured so as to be able to couple/fasten, when the arm 17 is in the lowered or locking position, in a rigid and stable, though easily releasable manner to the anchoring structure 19, so as to make the support plate 16 integral with the foot-casing 2.

In turn, the elastic counteracting member 18 is preferably interposed between the movable arm 17 and the support plate 16, and is adapted to apply, on mobile arm 17, an elastic torque or force that tends to bring and maintain the movable arm 17 in elastic manner into the lowered or locking position, i.e. with the distal end 17a in abutment against the anchoring structure 19.

More in detail, the elastic counteracting member 18 is preferably structured so as to be able to elastically bring and hold the movable arm 17 alternately and indifferently into the abovementioned lowered or locking position, and moreover also into a raised or unlocking position (see Figure 4) in which the movable arm 17 is rotated upwards with respect to the lowered position by a given angle greater than 120 ° .

In other words, in the raised or unlocking position (see Figure 4) the movable arm 17 extends cantilever and upwards from the support plate 16, while remaining roughly skimmed over the outer surface of cuff 3.

With reference to Figures 1, 2, 3 and 4, in addition the head of movable arm 17 is moreover hinged to the support plate 16 with the capability of freely sliding/moving on the support plate 16 in a predetermined direction d, which is locally substantially tangent to the surface of cuff 3 and parallel to the laying- and rotation- plane of movable arm 17, i.e. to the midplane of the ski boot. The elastic counteracting member 18 is adapted to counteract in elastic manner also the sliding/movement of the arm 17 along/on the support plate 16 in direction d.

In other words, the head of movable arm 17 is fixed to the support plate 16 so as to be able to freely move forward and backward on the support plate 16 in a direction d locally substantially tangent to the surface of cuff 3 and parallel to the laying- and rotation- plane of the cuff 3, i.e. to the midplane of the ski boot, and the elastic counteracting member 18 is adapted to counteract in elastic manner any translation of the head of movable arm 17 on support plate 16.

More in detail, the elastic counteracting member 18 is preferably adapted to apply, on movable arm 17, an elastic force f that tends to bring/push and maintain in elastic manner the head of movable arm 17 on the support plate 16 in a predetermined point of its longitudinal stroke on support plate 16 (see Figures 1, 3 and 4), which preferably allows the movable arm 17 to place the cuff 3 in the downhill position .

In other words, when it is in the lowered or locking position with the head at said predetermined point of the support plate 16, the movable arm 17 is adapted to arrange the cuff 3 in the downhill position.

With reference to Figures 1, 2, 3 and 4, in particular the head of movable arm 17 is preferably hinged to the support plate 16 by means of a transversal pin 20 that extends coaxially to a reference axis B substantially perpendicular to the laying- and rotation- plane of the movable arm 17, i.e. to the midplane of the ski boot, and engages in free axially sliding and rotating manner a pair of parallel and reciprocally-faced, guide slotted holes 21 that extend substantially in direction d and are formed on the support plate 16, preferably on opposite sides of the head of movable arm 17 and preferably also of the midplane of the ski boot, so as to be locally substantially tangent to the surface of cuff 3. Preferably, the guide slotted holes 21 are moreover substantially rectilinear.

The elastic counteracting member 18, on the other hand, is preferably structured so as to exert, on the transversal pin 20 of movable arm 17, an elastic force f which is directed parallel to direction d, i.e. parallel to the guide slotted holes 21, and is able to push and maintain in elastic manner the transversal pin 20 in abutment against a first end of the two guide slotted holes 21.

In other words, the elastic counteracting member 18 is preferably adapted to push and hold the head of movable arm 17 in elastic manner at one end of the stroke that the head of movable arm 17 is allowed to make on support plate 16.

With reference to Figures 1, 2, 3 and 4, in the example shown, in particular, the support plate 16 is preferably firmly fixed/ secured on cuff 3, or rather on rigid shell 9, by at least one transversal anchor screw 22 that preferably engages in pass-through manner the rigid shell 9 of cuff 3 before penetrating the body of support plate 16.

Preferably, the support plate 16 furthermore has two protruding wings 23 which are substantially parallel and faced to each other, and extend cantilevered from the outer surface of cuff 3 on opposite sides of the head of movable arm 17, preferably while remaining locally substantially perpendicular to the outer surface of cuff 3 and/or parallel to the laying- and rotation- plane of movable arm 17, i.e. parallel to the midplane of the ski boot .

The guide slotted holes 21 are preferably formed on the two protruding wings 23 of support plate 16, and the transversal pin 20 extends straddling the same protruding wings 23.

With reference to Figure 1, in turn the head or proximal end 17b of movable arm 17 is preferably substantially fork- shaped, and the elastic counteracting member 18 is preferably arranged between the two prongs of the head of movable arm 17.

Preferably both fork prongs are preferably pivotally joined to the support plate 16 via the transversal pin 20.

On the other hand, the distal end 17a of movable arm 17 is preferably structured so as to be able to stuck in removable manner onto a second transversal pin 24 preferably made of metal material, which extends coaxially to an axis C locally substantially perpendicular to the midplane of the ski boot, and therefore substantially parallel to the axis A and/or B, and is rigidly and stably secured to the rear part of foot-casing 2, or rather of rigid shell 6, astride the laying- and rotation- plane of the arm.

More in detail, the anchoring structure 19 preferably comprises the transversal pin 24 and a pair of reciprocally parallel and faced, support wings 25 that jut out from the rear part of foot-casing 2, or rather from the rear part of rigid shell 6, on opposite sides of the midplane of the ski boot, preferably in a substantially specular position with respect to the midplane of the ski boot, and extend up to the two ends of transversal pin 24 so as to directly support the transversal pin 24.

With reference to Figures 1, 2, 3 and 4, on the other hand the elastic counteracting member 18 preferably comprises: a transversal hub 27 which is fitted onto the transversal pin 20, preferably astride the laying- and rotation- plane of movable arm 17, and is angularly integral to the head or proximal end 17b of movable arm 17 so as to rotate about axis B together with the latter arm; and a push assembly 28 which is located/fixed on the support plate 16 beside the transversal hub 27, preferably astride the laying- and rotation- plane of movable arm 17, and is arranged in sliding/rolling abutment on the outer periphery of transver sal hub 27, so as to be able to push the transversal hub 27 in elastic manner in direction d, i.e. parallel to the guide slotted holes 21, while still allowing the transversal hub 27 to freely rotate about the reference axis B.

More in detail, the push assembly 28 is preferably located/ fixed on the support plate 16 beside and beneath the transversal hub 27, and is preferably adapted to push the transversal hub 27 upwards in elastic manner.

In the example shown, in particular, transversal hub 27 extends substantially coaxial to transversal pin 20, and preferably extends like a bridge between the two prongs of the head or proximal end 17b of movable arm 17.

In addition, the periphery of transversal hub 27 has a cam profile, and the push assembly 28 is adapted to interact with the periphery of transversal hub 27 so as to generate an elastic torque that tends to bring and hold the transversal hub 27 in a first angular position of stable equilibrium in which the transversal hub 27 arranges the movable arm 17 in the lowered or locking position (see Figures 1, 2, and 3), and optionally also in a second angular position of stable equilibrium in which the transversal hub 27 arranges the movable arm 17 in the raised or unlocking position (see Figure 4) .

In other words, in the second angular position of stable equilibrium, the transversal hub 27 is rotated upwards by an angle greater than 120°.

More in detail, the push assembly 28 is preferably located between the two prongs of the head or proximal end 17b of movable arm 17, and preferably comprises: a straight telescopic stem 30 which extends in direction d preferably astride the laying- and rotation- plane of movable arm 17, while remaining coaxial to a longitudinal axis L intersecting the axis B of transversal pin 20, and has a first axial end rigidly fixed to support plate 16 and a second, preferably substantially hemispherical in shape, axial end 31 arranged in sliding abutment onto the periphery of the transversal hub 27; and a coil spring 32 or other elastic counteracting element, which is preferably fitted onto the telescopic stem 30, and acts on the telescopic stem 30 so as to strongly push the axial end 31 of telescopic stem 30 in abutment against the periphery of transversal hub 27. In other words, the coil spring 32 is preloaded in compression so as to keep in elastic manner the telescopic stem 30 in the fully extended configuration.

The transversal hub 27, on the other hand, is preferably provided with at least one and preferably a pair of seats or recesses 27a and 27b that are located on the outer periphery of transversal hub 27 in a substantially diametrical position to one another, and each of which is shaped so as to be engaged by a part of the push assembly 28, or rather by the axial end 31 of telescopic stem 30, so as to counteract in elastic manner any further angular movement of transversal hub 27.

Preferably the push assembly 28 lastly comprises a damping pad 33 preferably made of elastomeric material, which is arranged inside the tubular sleeve of telescopic stem 30, so as to prevent the rod of telescopic stem 30 from hitting violently against the support plate 16.

General functioning of ski boot 1 is easy inferable from the description above and does not require any further explanation .

As concerns the cuff locking device 15, the user manually places the movable arm 17 in the locking position, when he/she wants to lock the cuff 3 in the downhill position.

The cuff 3 remains in the downhill position until the user applies a bending force on the cuff 3 that overcomes the resistance of the elastic counteracting member 18, and moves the head of movable arm 17 along the support plate 16, allowing a further small and temporary increase in the tilting angle of the cuff 3 with respect to the vertical.

The advantages connected to the cuff locking device 15 are remarkable .

Firstly, the cuff locking device 15 allows to lock the cuff 3 in the downhill position, allowing at same time the cuff 3 to make small swings about said downhill position.

In addition, the cuff locking device 15 can replace the cuff locking devices currently on the market, without requiring changes to the structure of the cuff and/or the foot-casing of the ski boot, with all the advantages that this entails .

It is finally clear that modifications and variations may be made to the ski boot 1 described above without however departing from the scope of the present invention.

For example, in a first alternative embodiment, the support plate 16 can be made in one piece with the cuff 3. In other words, the guide slotted holes 21 can be arranged directly on the cuff 3, or rather on the rigid shell 9.

Finally, in a different embodiment of elastic counter acting member 18, the push assembly 28 can be located/fixed on the support plate 16 beside and above the transversal hub 27, so as to push the transversal hub 27 downwards in direction d.