EP0790008B1 - Sportsshoe with adjustable quarter - Google Patents

Description

The invention relates to a sports shoe consisting of a rod and a shell base connected and hinged together in the area corresponding to the wearer's ankle joint, and subject a device for coupling the upper with the shell base in the dorsal region of the shoe, which device is intended to determine the bending conditions of the rod relative to the base of shell.

Known sports shoes of this type, in particular ski boots, include generally a rod and a shell base which are hinged together around connecting axes in the zone corresponding to the ankle of the wearer where they join by interlocking at least partial one over the other; conventionally, the nesting is achieved by the lower edge of the rod which covers a flange formed by an extension of the wall of the base shell which ensures a good seal. This collar, more or less flexible and high, is of a part, centered in the dorsal zone of the heel of the shell base on either side of the axes of articulation of the rod, and on the other hand, is associated with a transverse rim on which the border lower part of the rod is supported when the rod is pivoted backwards. So arranged, the junction zone between the rod and the shell base makes it possible to limit the bending of the rod towards the rear and offers some resistance to its forward bending. Indeed, because it covers the flange coming from the hull base, its pivoting towards the front is only possible if to cause the elastic deformation of the collar at least in the area between its axes of articulation and the dorsal zone of the heel of the base of shell, and to overcome the forces of friction who as a result. To do this, it is therefore necessary that the force applied to the anterior part of the rod, in correspondence of the skier's tibial zone, is greater than that resistant provided by the collar which cooperates with the rear part of the rod, which collar therefore constitutes a means of controlling the flexion in effort. In addition, the collar being encircled by the border lower posterior of the rod on either side of the axes of articulation thereof, the result of the effort produced to cause it to flex forward is transmitted obliquely from the rod to the end of the hull base in a direction always oriented substantially perpendicular to the axes articulation of the upper, that is almost always in the longitudinal axis of the shoe; the collar thus associated with the articulation axes of the rod therefore constitutes a means of controlling the bending of the rod intervening in the direction of the force transmitted towards the hull base.

These shoes are relatively satisfactory because they are very simple in structure, relatively waterproof, easy to manufacture, therefore of reduced cost, and because they have flexibility of progressive rod in effort which is obtained by a pulling effect on the dorsal area of the shoe, which is a factor of comfort for the skier; actually, by doing so, the effort applied to the anterior part of the rod by the skier is distributed over a large area of wrapping extending over the skier's tibial area and on either side thereof, hence the absence hard point or localized pressure, which are very often found on shoes where the effort resistant is obtained by a pushing effect on the front part of the shoe, between the upper and the hull base.

However, these shoes prove to be of an insufficient level of performance as soon as that they are aimed at experienced skiers who wish to master and refine their technique, by example for competition, all terrain snow skiing, or demonstration skiing, and above all to transmit a maximum of power, that is to say of force, in their support on the rod for optimize ski-snow contact pressures, directional effects, ... etc.

So, for example, we see that the upper of these shoes is not really limited in swiveling forward to prevent accidents including back bending or extreme dorsi-flexion of the skier's ankle, such as ruptured ligaments, tendons or tears muscles. Indeed, nothing is firmly against the pivoting of the rod forward; in fact the rod finds its limit of bending only when its lower front edge rests on the part of the shell base which is opposite, that which corresponds to the area of the instep and this, in the deforming if necessary so that the resistance opposed by it reaches a level capable to stop the rod in its pivoting; it follows from this that the bending limit of the rod of these shoes is variable depending on the force applied to the upper, and in any event it determines an excessive amount of flexion which can be traumatic for the wearer.

Another disadvantage relates to the difficulty of obtaining a great effort of resistance to bending of the rod towards the front by simply varying the thickness, the height and the flexibility of the collar coming from the hull base. Indeed, given that this collar is located at the place where the foot takes place during the shoeing-taking off, it is necessary that it is flexible enough to deviate under the simple pressure of the foot during its passage and without other intervention; it is also necessary that it does not extend too high in the dorsal area of the hull base so as not to interfere the engagement-release of the heel of the skier's foot always during the boot-heaving.

Yet another drawback concerns the absence of any adjustment whatsoever for varying the effort of bending of the rod, its angle of advance, the direction of the resultant of the force it transmits towards the hull base, or for the amplitude of its possible bending.

To overcome some of these drawbacks without calling into question the simplified structure of these shoes that have all the necessary means to control flexion, even if they are insufficient as explained above, a known solution is to use them as basic structure to which is added means for strengthening and retaining the rod on the collar. This is what is achieved, for example on the "PRO" alpine ski boot models from Lange in 1972, "Equipe" by Caber in 1982, and "Grand Prix" by Nordica in 1995. Indeed, on these shoe models whose basic structure is comparable to that of ski boots described above, the reinforcement is carried out using at least two coupling means ensuring a fixed and permanent connection between the rod and the collar as described in document FR-A-2 682 571. These coupling means are arranged on either side of the dorsal area of the heel of the shell base and of the upper, so symmetrical, and in the space between the points of articulation of said rod and said dorsal zone. By this arrangement of the coupling means, the upper of the shoe is blocked, that is to say prevented from any determined pivoting, and the forward bending forces applied to it by the lower legs of the skier are thus transmitted towards the hull base with a minimum of loss of force and in a shorter, even almost instantaneous, manner because the only amplitude of bending of the rod only results from the deformation of the materials used.

In addition, the coupling means being located in the dorsal region of the shoe and both on the other, the force resisting the forward bending of the rod remains obtained by an effect of pull which relatively preserves the tibial area of the lower leg of the skier. It is obvious that the provision of at least two or more coupling means, as produced on these shoes, makes it possible to reduce the pressure on them, and thus the risk of deterioration.

These shoes therefore have, compared to the shoes previously exposed, a high resistance to bending and practically no bending amplitude which is relatively satisfactory for experienced skiers, but, consequently, cannot be addressed to all skiers because too specific, especially in rigidity, and this, without the possibility of adjustment whatsoever for vary the bending force, the advancing angle, the bending amplitude or the direction of the force transmitted to the ski by the hull base interposed.

It follows from the foregoing analysis that sports shoes having a simplified structure such as described above, give overall satisfaction to the user insofar as they are used for their specificity, that is to say for a sport in leisure-relaxation or very technique such as competition. Indeed, the strengthening of the bending resistance of the rod these shoes by fixed and permanent coupling means is not achievable by the user of the shoe, and is not reversible or adjustable for later adaptation, for example in view to increase the amplitude of the bending of the rod. To satisfy the greatest number of users of these shoes, it is therefore necessary to provide a large number of models corresponding at least to the different categories of users estimated, and to give each model the characteristics specific to best meet the requirements of these categories. Obviously, this way of to proceed is complicated, expensive because of the need to have many models, and provides only an average technical solution for the user because it is determined on the basis of a "user category" and does not really allow customization of the shoe.

The present invention aims to remedy these various drawbacks inherent in footwear. sport described above and is intended to allow the user himself to give them additional technical characteristics specific to the sporting use he wishes to make of it, and this, in a simple, efficient and reversible way.

The invention also aims to propose a single model of shoe with a simplified structure which is compatible for several categories of users, or even for all users in the sports practice considered.

To achieve these objectives, the sports shoe has a basic structure consisting of a rod and shell base connected and hinged together around articulation axes in the area corresponding to the articulation of the ankle of the wearer where they join by interlocking at least partial to each other via the lower edge of the rod and a flange of the shell base, and comprises a device for coupling the rod with the shell base consisting of two coupling means arranged on either side of the dorsal region of the shoe on points of fixation. It is characterized by the fact that the coupling means are removable and replaceable by other coupling means, in particular by means having characteristics different mechanics.

By this removability characteristic of the coupling means, the shoe according to a structure simplified base can easily be adapted by the user, either by removing the coupling means for a sport in leisure-relaxation, either by implementing the coupling means for a very technical sport, for example competition.

Also, still thanks to the removability of the coupling means which are located on either side from the dorsal area of the shoe and behind the articulation and linkage axis of the upper, it is possible to modify the direction of the result of the force transmitted from the rod to the hull base by bending. Indeed, for this it suffices to use only one of the two coupling means of the rod with the flange of the shell base which has the effect of strengthening only the side of the shoe where the coupling means is located, ie in the area between the latter and the axis corresponding articulation of the rod. By this arrangement, the bending forces which are applied on the rod are transmitted by the latter obliquely to the shell base in a non-oriented direction more according to the position of its two axes of articulation, but according to the position asymmetrical of the single coupling means used with respect to the two axes of articulation. The consequence is that the orientation given to the resultant of the force applied to the rod diverges by relation to the longitudinal axis of the shoe on the side corresponding to the reinforced side, in forward bending or back.

This possibility of modifying the direction of the resultant of the force transmitted by the rod is revealed be very interesting because it allows for example the skier to increase the pressure on only one of the edges of the sole of the hull base, and consequently on the corresponding edge of the ski while skiing. It is obvious that such an asymmetrical coupling which increases the lateral pressure is preferably made on the internal side of each shoe because it is mainly on the internal edge skis that the skier needs to transmit the greatest efforts, especially for the attachment of the ski or to optimize certain directional effects for example.

According to different embodiments, the shoe is also characterized by the fact that the attachment points of the two coupling means are located on either side of the back region of the shoe upper, either symmetrically or asymmetrically, depending on whether may or may not want to give the shoe a particular behavior originally intended. In the first construction case, for example, the simultaneous implementation of the two coupling means gives a result of the effort, transmitted by the rod, always oriented in a direction substantially perpendicular to the axes of articulation of the latter. In the second construction case, by against, the simultaneous implementation of the two coupling means always produces a result of the transmitted force which is more directed on the side of the side of the shoe where the reinforcement is the more important, which results in orienting it in a direction that is always significantly divergent relative to the longitudinal axis of the shoe. Obviously even in this embodiment, one can only use a coupling means to further accentuate the divergence of the result of the force transmitted by the rod towards the hull base relative to the longitudinal axis of the shoe.

According to one embodiment of the coupling device, each coupling means is constituted, on the one hand, a shoulder washer pierced with a hole in the middle and intended to cooperate by its shoulder with a light obtained in the wall of the rod, and on the other hand, in one piece removable assembly, such as a screw or a threaded axis, extending transversely to the walls of the flange of the shell base and of the rod through which it passes through the hole in the washer; the coupling of the rod with the flange of the shell base is thus achieved by means of the part assembly which allows the wall of the rod to be sandwiched between the shoulder washer and the wall of said collar, while the shoulder, housed in the lumen of the rod, limits movement possible of the latter on its axes of articulation relative to the assembly part which is fixed in position on the hull base flange.

It follows from this construction of each coupling means that it suffices to modify the adjustment of the shoulder of the washer relative to the light with which it cooperates to allow a corresponding relative displacement of the rod relative to the collar by pivoting around its axes of articulation or to block it, and thus to modify the amplitude of flexion. In fact, the outline outside of the washer shoulder is provided smaller than the inside of the light, and preferably on the side where the relative displacement is desired; the value of the game, or space, left free between the shoulder and the light thus determines the value of the maximum relative displacement authorized of the upper with respect to the shell base on each flank considered of the shoe. Also, always on the basis of this kind of construction of each coupling means, it suffices to interpose in the space left free between the shoulder and the light a compressible material elastically to dampen the relative displacement of the rod, and therefore vary the bending force. In order to allow the user of the shoe to intervene himself on these parameters and thus to confer to the shoe the technical characteristics it wishes, a set of washers, with shoulders of various dimensions and / or shapes, always accommodatable in the original lights provided in the shoe upper, is provided and made available. So by replacing a type a different type of washer on each side of the shoe, the flexion conditions are modified the rod relative to the shell base.

• le blocage de la tige dans les deux sens de flexion, avant et arrière, et en retournant la rondelle de 180°, une modification de l'angle d'avancée de la tige pour la valeur de l'excentration de l'épaulement,
• le blocage de la tige dans un sens de flexion, avant ou arrière, et une flexion amortie dans l'autre sens de flexion, dans les limites permises par la lumière oblongue et la compressibilité du matériau amortisseur,
• le blocage de la tige dans le sens de flexion, avant ou arrière, et une flexion libre dans l'autre sens de flexion, dans les limites permises par la lumière oblongue.

According to a preferred embodiment, the upper of the shoe has on each side an oblong light which is oriented on a tangent coming from the corresponding articulation axis of said upper and the set of shoulder washers is of three types : the first has an eccentric shoulder and oblong shape adjusted to that of the oblong slot, the second a shoulder similar to the first but made of a rigid material and an elastically compressible material, the rigid material extending to the place of the hole for passage of the assembly part, and the third a centered shoulder and of cylindrical shape with a diameter substantially smaller than the width of the oblong opening. Thus, depending on the shoulder washer used, we obtain:

• blocking the rod in both flexion directions, front and rear, and by turning the washer 180 °, a change in the angle of advance of the rod for the value of the eccentricity of the shoulder,
• blocking of the rod in one direction of bending, front or rear, and damped bending in the other direction of bending, within the limits permitted by the oblong light and the compressibility of the damping material,
• blocking of the rod in the direction of bending, front or rear, and free bending in the other direction of bending, within the limits permitted by the oblong lumen.

The mounting of these washers being independent from one side to the other of the shoe, it goes without saying that a multitude of symmetrical and asymmetrical combinations is therefore authorized, which allows the user to specifically adapt the behavior of the shoe to his wishes and use sportsman envisaged.

The invention will moreover be better understood by referring to the description which follows in reference to the appended schematic drawings showing, by way of example, an embodiment a sports boot, such as a ski boot, equipped with an adjustable coupling device of its stem.

Figure 1 illustrates, in exploded view, a ski boot provided with a device for coupling its adjustable rod using a set of different types of coupling means.

Figures 2 and 3 show, in partial longitudinal section, the shoe of Figure 1 in a first advancing position (Figure 2) and in a second advancing position (Figure 3).

FIG. 4 represents a ski boot similar to that of FIGS. 1 to 3 but whose base of shell has no rear support rim.

Figures 5 to 11 show, seen in section along the line V-V of Figure 2, the different possible mounting of the coupling means and their operation.

Figures 12 to 14 schematically illustrate certain directional effects that the coupling can provide in the transmission of the forces of the rod in the direction of the shell base depending on whether its coupling means are mounted symmetrically or asymmetrically.

The ski boot illustrated in Figures 1 to 3 has a structure consisting of a rod 1 and a hull base 2 provided with a walking sole 3. The rod 1 and the hull base 2 are connected and articulated together around articulation axes 4 located in the zone corresponding to the articulation of the wearer's ankle (not shown), and are limited in rear pivoting by a support flange 18; these parts 1 and 2 of the shoe are joined by at least partial interlocking one, 1, on the other, 2, via the lower edge 5 of the rod 1 and a flange 6 of the base of shell 2, which extend at least above the heel 8, and possibly the instep 9, as in this example shown. In the latter case, two lateral notches 12 separating the anterior part 6a of the posterior part 6b of the collar 6 are advantageously provided in order to to facilitate the elastic deformation of the collar 6 when the rod 1 flexes on the front. Also, so as not to hinder the passage of the heel of the skier's foot, when putting on or taking off, a another notch 36 is produced in the upper dorsal end of the collar 6.

A coupling device consisting of two coupling means 10 arranged on either side of the dorsal zone 11 of the shoe makes it possible to connect the upper 1 and the shell base 2 to each other at fixing points 22 located symmetrically behind the hinge pins 4, and above from these at a certain distance marked with the letter "X", as shown; these points of fixing 22 can obviously be provided located asymmetrically, either in height and / or laterally. This device is characterized by the fact that each coupling means 10 is removable and / or replaceable by other coupling means 10 which may have different mechanical characteristics. Each coupling means 10 consists of a washer 13 with shoulder 14 pierced with a hole 15 in the middle, and with an assembly part 16, such as a screw, allowing a removable assembly.

This assembly part 16 extends transversely to the walls of the collar 6 of the base of shell 2 and rod 1 which it passes through a hole or opening 17 in the latter and passes through the hole 15 of the washer 13, the shoulder 14 of which is housed in said slot 17. The coupling of the rod 1 on the flange 6 of the shell base 2 with the coupling means 10 described means that the wall of the rod 1 is sandwiched between that of the collar 6 and the washer 13, and limited in pivoting on its axes of articulation 4 depending on the clearance or the space left free between the outer contour of the shoulder 14 and the outline of the lumen 17. It emerges from this arrangement of the coupling means 10 that they can not only be replaced or only used, but also removed; in this case, we return to the shoe these basic functional characteristics, that is to say that the rod 1 can bend forward, subject to overcoming the resistance opposed by the collar 6 by its elastic deformation, and is blocked towards the rear, as soon as it bears on the rim 18 of the base hull 2.

• dans la version A, l'épaulement 14 est de forme oblongue excentrée par rapport au trou 15 et son contour est ajusté à celui de la lumière 17, ledit épaulement étant de préférence réalisé dans un matériau rigide,
• dans la version B, l'épaulement 14 est de forme identique à celui de la version A mais est réalisé en bi-matière, c'est-à-dire constitué d'un matériau rigide à l'endroit 20 du trou de passage 15 et d'un matériau compressible élastiquement pour le reste repéré par la référence 21,
• dans la version C, l'épaulement 14 est de forme cylindrique centrée sur le trou de passage 15 et présente un diamètre extérieur sensiblement plus petit que la largeur de la lumière oblongue 17.

In the present embodiment, the opening 17 obtained in the rod 1 is of oblong shape and is oriented on a tangent, identified by the reference 19, coming from the corresponding articulation axis 4 of said rod 1, and the shoulder 14 of the washer 13 is adapted. For this purpose, the washer 13 is, for example, provided according to three different types of construction having shoulders 14, versions A, B or C, visible in FIG. 1, which are made available to the wearer of the shoe:

• in version A, the shoulder 14 is of oblong eccentric shape relative to the hole 15 and its outline is adjusted to that of the lumen 17, said shoulder preferably being made of a rigid material,
• in version B, the shoulder 14 is identical in shape to that of version A but is made of bi-material, that is to say made of a rigid material at the location 20 of the through hole 15 and of an elastically compressible material for the remainder identified by the reference 21,
• in version C, the shoulder 14 is of cylindrical shape centered on the through hole 15 and has an outside diameter substantially smaller than the width of the oblong opening 17.

The user thus has three coupling means 10A, 10B and 10C, with characteristics different mechanics, each influencing the possibilities of bending of the rod and what is more, which are each capable of being implemented in two positions opposite 180 °, which determine the direction of possible movement given to the rod 1.

By way of example, FIGS. 5 to 11 illustrate, in detail, the implementation of the three means of coupling 10 according to versions A, B and C, and the incidence of their 180 ° overturning.

In FIGS. 5 and 6, which correspond to the positions of the boot illustrated in FIGS. 2 and 3, the shoulder 14A of the coupling means 10A completely fills the lumen 17 and thus prevents any displacement of the rod 1 relative to the flange 6 of the shell base, via the assembly part 16 which is fixed in position on its fixing point 22. Furthermore, by its 180 ° reversal, from the position shown in Figures 5 and 2 to that of Figures 6 and 3, the washer 13 of the coupling means 10A requires the displacement of the lumen 17 of the rod 1 on the side of the eccentricity of the shoulder 14A so that said lumen 17 is opposite said shoulder 14A. Because of this displacement, the "angle of advance" or "inclination" of the rod 1 relative to the base of shell 2 is modified for the value of the eccentricity of the shoulder 14A as indicated by the arrow 23. It goes without saying that in such a mounting case the rear support flange 18 has no effect on the rod 1, and that its absence, as shown on the shoe in Figure 4, does not affect behavior of said shoe. On the other hand, the withdrawal of the two coupling means 10 completely releases the rod in even bending backwards, and in this case the absence of a rear support flange 18 can be a handicap for the skier for his anteroposterior balance especially.

In FIGS. 7, 8 and 9, the shoulder 14B of the coupling means 10B completely fills the light 17 as in the case of the means 10A, but because it comprises a compressible part 21, the rod 1 remains possible of a certain displacement relative to the fixing point 22 within the limits of compressibility of said part 21 as indicated by arrow 24 in FIG. 8, from the position initial of FIG. 7. It goes without saying that the 180 ° reversal of the washer 13 requires, as previously for the shoulder 14A, the displacement of the rod 1 around its axes 4 in order to bring the light 17 opposite the shoulder 14B, Figure 9; on the other hand in this case, the rod retains a certain freedom of movement on the side where the compressible part 21 of shoulder 14B. Thus, it is possible to obtain, depending on the mounting direction of the coupling means 10B, damping of the rod 1 in forward or rearward bending.

In FIGS. 10 and 11, the shoulder 14C of the coupling means 10C of cylindrical shape leaves free in permanently some space between it and the ends of the oblong lumen 17, and thus allows the rod 1 to freely debate around its axes of articulation for the value of this space, the shoulder 14C constituting the stop means in front and rear extreme bending.

From the above description it emerges that the user can use a coupling means chosen 10, 10A, 10B or 10C, on one side of the shoe, and a different coupling means on the other side of the shoe. The user can also use only one coupling means 10, 10A, 10B or 10C. For all these assembly cases mentioned, it clearly follows that the bending of the rod forward and / or back then generates different effects intervening in the direction from the result of the force transmitted from the rod 1 to the shell base 2, the level of the forces, the damping of the bending, the amplitude of the bending, and / or the advancing angle of the rod 1.

Thus, as in the example illustrated in FIG. 12, when the coupling means 10 are arranged symmetrically on either side of the dorsal zone 11 and its axes of articulation 4, the direction of the result of the force transmitted is substantially perpendicular to said axes of articulation 4, as indicated by arrows 28 and 29 depending on whether the bending is directed forwards or backwards, that is to say substantially in the longitudinal axis 39 of the shoe.

In the case of FIG. 13, the implementation of a single coupling means 10 has been illustrated, on the side outer 30 of the shoe. In this case, only the side corresponding to this side 30 is reinforced. in the zone between the axis 4 to the coupling means 10; therefore, the efforts of bending inflicted on the upper 1 of the shoe forwards or backwards generates a lateral torque which directs the direction of the resulting force on this reinforced side of the shoe, that is the external side 30 as indicated by arrows 31 and 32, therefore diverging from the longitudinal axis 39 of the shoe.

Conversely, in the case of Figure 14, it is illustrated the implementation of a single means of coupling 10 on the internal side 33 of the shoe. In this case, the direction of the resulting force, which is always oriented on the reinforced side of the shoe, is then directed, 34, on the internal side 33. This asymmetrical coupling is of course more interesting than the previous one because it accentuates the force transmitted from the inner side of the boot which corresponds to that of the inner edge of the skis where the efforts and support must be the most important for the grip of the ski, and / or to optimize certain directional effects during cornering in particular.

Claims (9)

1. Sport boot having a structure constituted by an upper (1) and a shell base (2) connected and journalled to one another about journal axes (4) in the zone corresponding to the joint of the wearer's ankle, where they are joined by at least a partial nesting on one another via the lower edge (5) of the upper (1), and by a collar (6) of the shell base (2), and comprising a device for coupling the upper (1) to the shell base (2) constituted by two coupling means (10) arranged on both sides of the dorsal zone (11) of the boot on fixing points (22), characterized in that the coupling means (10) are removable and replaceable by other coupling means (10A, 10B, 10C) having different mechanical characteristics, each coupling means (10) being constituted by a washer (13) with a shoulder (14) punched by a hole (15) in its center which is adapted to cooperate, through its shoulder (14), with a slot (17) obtained in the wall of the upper (1), on the one hand, and by an assembly element (16) positioned on the corresponding fixing point (22), this element being removable and extending transversely to the walls of the collar (6) of the shell base (2) and of the upper (1) which it crosses by passing through the hole (15) of the washer (13).
2. Sport boot according to claim 1, characterized in that the fixing points (22) of the coupling means (10) are symmetrically located on both sides of the dorsal zone (11) of the boot upper (1).
3. Sport boot according to claim 1, characterized in that the fixing points (22) of the coupling means (10) are dissymmetrically located on both sides of the dorsal zone (11) of the boot upper (1).
4. Sport boot according to any of claims 2 or 3, characterized in that the fixing points (22) of the coupling means (10) are vertically located at a distance "X" above the journal axes (4) of the upper.
5. Sport boot according to claim 4, characterized in that the extemal contour of the shoulder (14) of the washer is provided to be smaller than the internal contour of the slot (17) of the upper (1), the value of the space, which is left free between the shoulder (14) and the slot (17), determining the value of the relative displacement of the upper (1) with respect to the shell base (2) on the boot flank that is considered.
6. Sport boot according to any of claims 4 or 5, characterized in that the slot (17) obtained in the wall of the upper (1) is oblong and oriented on a tangent (19) generated from the corresponding journal axis (4) of said upper (1).
7. Sport boot according to any of claims 5 or 6, characterized in that the shoulder (14A) of the washer (13) is made out of a rigid material.
8. Sport boot according to any of claims 5 or 6, characterized in that the shoulder (14B) of the washer (13) is made of a rigid material and of an elastically compressible material, the rigid material extending to the location (20) of the passage hole (15) for the assembly element (16).
9. Sport boot according to claim 6, characterized in that the shoulder (14C) of the washer (13) is centered and cylindrical, with a substantially smaller diameter than the width of the oblong slot (17).

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