FR3109279A1 - DEVICE FOR CONNECTING THE LOWER LEG OF A SKIER WITH A SKI BINDING, INTEGRATED FOOTWEAR ASSEMBLY OF THE DEVICE - Google Patents

Abstract

Connection device between the lower leg J of a skier S with a foot P and an ankle axis CC ', on a ski binding F mounted on a ski board PS, comprising a foot assembly (30), a tibial connection (16) with at least one rigid rod (16-3), said at least one rigid rod comprising an upper end (16-1) comprising fixing means (18) to the lower leg J, including securing means (24) and a lower end (16-2) comprising a pivot connection (20) along an axis AA 'with respect to said footwear assembly (30), characterized in that it comprises articulation means (22) having at the at least one degree of freedom, interposed between the upper end (16-1) of said at least one rigid rod (16-3) and the means for fixing (18) to the lower leg J. The invention also covers the footwear set equipped with this device. Figure to be published with the abstract: Fig. 2

Description

DEVICE FOR CONNECTING THE LOWER LEG OF A SKIER WITH A SKI BINDING, FOOTWEAR ASSEMBLY INCORPORATING SUCH DEVICE

The invention relates to a device for connecting the lower leg of a skier with a ski binding. The invention also covers the footwear assembly incorporating said device.

In the alpine domain and more particularly in skiing and ski boots, many constraints appear and often make skiing uncomfortable. Indeed, the technology of ski boots has changed little over time and only offers approximate comfort for the feet, while the practice requires increased comfort for practitioners. Currently, ski boots are made of relatively rigid plastic material and comprise two articulated rigid parts. The vertical part of the ski boot receives part of the tibia and the calf and the horizontal part receives the foot itself. The amplitude of ankle flexion in such shoes is very limited, only a few degrees. Adjustment means have been provided to adjust this amplitude but over extremely limited ranges. During practice, there are foot movements and shoe movements that are different. Indeed for the comfort of the practitioner, comfort foams are interposed and therefore according to the tightening of the shoe, according to the thickness and the type of foam, there are parasitic movements.

Moreover, despite foams, shape memory, self-molding, thermo-forming materials and other interfaces, comfort remains very limited in addition to the costs of such materials. These intermediate materials are currently necessary because it is these coatings that contribute to thermal insulation. It is also understood that the forces exerted by the skier are not transmitted directly, except by clamping the boot very strongly with the corollary of total discomfort and difficulty of practice for several hours. Control is therefore uncertain. In addition, the morphology is very little taken into account depending on whether the foot is thin or strong, whether the kick is pronounced or whether the ankle is thin, prominent or not and even the materials with personalized shaping cannot all compensate for.

It has also been found that the shoes being closed, in a tight rigid shell, they generally constitute a tight barrier vis-à-vis the outside and the snow or the outside water, but this tight rigid shell also constitutes a closed volume from which it is very difficult to evacuate the humidity generated by the phenomenon of natural perspiration of the foot. Another significant drawback is the weight of such shoes with rigid shells, linked to the large volume of plastic material to constitute the enveloping shell to which is added the weight of the clamping members, of the foams. The aerodynamics of current ski boots is also penalized by the very large external volume of the boots due to the sock, the foam, the shell and the tightening devices, which has led to competitors' suits coming along the shoe in an attempt to minimize the impact of the volume of the shoe on aerodynamics or even to add aerodynamic appendages for certain competitions or records.

A zone of the foot is particularly stressed mechanically, in line with the astragalus which is compressed during flexion movements. During these forward movements, the upper part of the shell bears against the stem of the shell and exerts significant support. It is a real source of discomfort and trauma. Similarly, pressure on the malleolus can chew the flesh and cause localized overheating. Depending on the morphology of the skier, the profile of the boot, the supports, during flexion, the supports can also be concentrated at the top of the part situated around the lower leg and cause certain discomfort due to a concentration of the forces.

There clearly appears a notable lack of flexibility of articulation between the two parts, which induces discomfort during the forward/backward movements inherent in skiing. In addition to the rigidity of this connection between the two parts, the flexibility of this connection is fixed by the specific characteristics of the shoe such as the geometry, the materials used, the arrangement of the non-adaptable shoe. The characteristics of plastic materials also vary with the temperature during the day or according to the seasons. But the need for support and flexibility, the need for bending can be very different depending on the discipline practiced, according to the practitioners and their level of practice. Each of the two parts considered independently is equally uncomfortable for the foot as for the tibia part of the lower leg.

We also note with current ski boots that changes are not possible according to the seasons, we have a pair of ski boots and we must ski with them, whether the season is more or less hot or more or less cold. Only the liner can be changed but its thickness remains the same since the geometry of the shoe remains unchanged and unchangeable. The aesthetic aspect is completely obscured. Current solutions do not offer the possibility of changing the practice of skiing by requiring a boot with more or less "flex", that is to say amplitude of flexion for example, depending on the snow conditions, depending on whether it is downhill skiing, in this or that specialty or even ski touring.

It is also noted that the repair of such existing ski boots can only be carried out by professionals when one of the elements deteriorates. The possibilities of changing shoes and having them repaired quickly remain difficult. Considering the price also usually a skier owns only one pair of boots. Modularity is also impossible because if it is warmer at the start or end of the season, it is not possible to remove or modify the liner of the shoe even if it is removable because the design of the shoe includes a single type of liner, of a given thickness and in a given material.

Solutions have been sought, this is how there are walking shoes that provide thermal insulation and waterproofing while the structural function is obtained from strips and levers but these organs are connected to said shoe Steps. In this case, the feeling is unsatisfactory because the holding function of the foot is always interfered with by the intermediate thermal insulation and sealing elements of the shoe.

Another solution consists in arranging a shoe shell for the sole foot and a lever with a band is connected in an articulated manner to said shell and by its other end to the calf or at least to the lower leg by a band with tightening means. Mechanical stops limit the amplitudes of bending. This has a major drawback which is that of the axis of rotation. Indeed, for comfort and satisfactory movement, the axis of rotation between the shoe and the upper must be perfectly centered on the malleolus of the practitioner, shoes on the feet. But because of the morphology of each, even if the manufacturers make calculations and tests, the result can only be based on the average of the results acquired. There is therefore most of the time an offset between the pivot axis of the ankle and the pivot axis of the upper with respect to the footwear shell. In fact, this misalignment necessarily causes, geometrically, a combined movement of translation and rotation between the headband and the calf, in line with the headband, which can be of greater or lesser amplitude, but in any event of an alternating and repetitive type. , generating at least discomfort or even injury, disabling for the practice the following days.

The present invention proposes a device for connecting the lower leg of a skier with a ski binding aimed at replacing the part capable of receiving the tibia with a lighter and more comfortable tibia support system, eliminating the effects of misalignment at the right of the ankle and the lack of parallelism between the tibia and the upper part while responding to the various functions of linking the skier's body with the ski for better control during practice, for adjustable thermal insulation and improved sealing, without midsole elements likely to interfere while ensuring excellent ventilation of the foot with evacuation of the humidity produced.

The invention covers the footwear assembly equipped with the connecting device according to the present invention.

The present invention thus makes it possible to solve many technical problems by improving the comfort of the practitioner, by proposing a much lighter device and adaptability according to the season, the skiing conditions, the type or discipline of skiing practiced (e ). the present invention allows rapid repairs without special tools, a reduced manufacturing cost and a limited quantity of material.

To this end, the connection device according to the present invention, between the lower leg J of a skier S with a foot P and an ankle pin CC', on a ski binding F mounted on a ski board PS, comprising a footwear assembly, a tibial connection with at least one rigid upper, the said at least one rigid upper comprising an upper end comprising means of attachment to the lower leg J, including securing means and a lower end comprising a pivot connection according to an axis AA' with respect to said footwear assembly, comprises means of articulation having at least one degree of freedom, interposed between the upper end of said at least one rigid upper and the means of attachment to the lower leg J. More particularly , the articulation means comprise a degree of freedom in translation or better still, a degree of freedom in translation and a degree of freedom in rotation.

According to one embodiment, the articulation means comprise a mushroom-shaped pin with a body and a head, secured to the means for securing to the lower leg J and comprise a longitudinal slot formed at the upper end of the upper rigid, through which passes the body of said peg, this slot having a width less than the diameter of the head, so that the body of said peg slides in this longitudinal slot while the head of said peg retains said upper end of the rigid rod of said tibial connection.

The present invention is now described using only illustrative examples and in no way limiting the scope of the invention, and from the accompanying illustrations, in which:

shows a schematic view of the interaction between a prior art tibial attachment ski fitting device and the anatomy of a skier's lower leg.

shows a schematic view in side elevation of the device for connecting the lower leg with a ski binding according to the present invention.

shows a schematic view in side elevation of the device for connecting the lower leg with a ski binding according to the present invention and its damping means.

shows one of a first variant of the registration means seen from a first variant of the registration means.

shows a view of a second variant of the registration means.

In FIG. 1, the interaction between a footwear device A10 and the lower leg J of a skier S in an embodiment of the prior art has been represented in a simplified manner. Thus the footwear device A10 of the prior art is fixed in a known manner by its sole A12, integral with a shell A14 receiving the foot P, on a ski board PS by means of a binding F this in a known manner . The footwear device A10 of known type comprises a tibial connection A16. This tibial connection A16 consists of at least one rigid rod A16-3 which comprises at its upper end A16-1 fastening means A18, intended to be positioned in the lower part of the calf M, above the ankle C of the skier S and comprises at its lower end A10-2 pivot A20 connecting means with the shell A14. This tibial connection A16 can therefore pivot around an axis AA' and the skier's tibia S can pivot with respect to the foot around an axis CC' which is the axis of the ankle C. It is noted that in the mode of embodiment shown, there is provided a single semi-enveloping rigid rod which is totally equivalent to two right and left rods interconnected.

According to the anatomy of a skier S, which is necessarily different from one skier to another, even for an identical foot length, these axes AA' and CC' can only exceptionally be confused. However, during practice, the skier S is led to continually modify his position in relation to the ski boards PS and his center of gravity, by bending and tilting the tibia with a certain amplitude to bring his weight forward. , on the back. What is more, these variable inclinations in the front/rear plane take place during phases with positions of the body and therefore of the lower leg more or less inclined laterally, which also continuously modifies the supports, the efforts. There is therefore an off-centering of the axes which induces translational movements of the fixing means A18 of the tibial connection A16 on the calf M at each flexion movement. These movements are limited but they are continuous and cause at least discomfort, at worst an injury, especially since the fastening means A18 are tight, but said fastening means A18 also need a minimum of tightening to maintain good ski control.

The present invention is schematically shown in Figure 2, the sock type clothing, pants, have been removed for clarity of representation. In this figure 2, we find the elements common with those of the prior art, with the same references, by deleting the A. The connecting device 10 of the lower leg J of a skier S to a ski binding, according to the present invention, comprises a tibial connection 16, in the form of at least one rigid rod 16-3, the upper end 16-1 of which carries means of attachment 18 to the lower leg and the lower end of which 16-2 carries a pivot connection 20. The present invention relates in particular to these fixing means 18 which comprise means of articulation 22, with at least one degree of freedom, in translation in the main and in translation and rotation in the best embodiment. This arrangement can therefore be adapted to existing shell shoes with tibial connection, single shoes with tibial connection connected to said single shoe or even to the embodiment of a preferential footwear assembly with a sole as described above.

For this purpose, the fastening means 18 comprise means 24 for securing the lower leg J, for example in the form of a collar 26 of the type comprising at least one strip whose ends are provided with self-gripping means. These self-gripping means allow an adjustment of the tightness of the fastening means by the skier S on the lower leg, this in a known manner. The tibial connection 16 comprises at least one rigid rod 16-3, right and left or semi-enveloping, each with an upper end 16-1. The articulation means 22 are interposed between each upper end 16-1 of said at least one rigid rod 16-3 and the fixing means 18. In this case, two right and left rods are provided, but they could also not be than a rigid rod of semi-enveloping shape as already indicated.

According to a preferred embodiment, the articulation means 22 comprise at least one degree of freedom chosen from translation and rotation, translation being chosen primarily. For each at least one rigid rod 16-3, still according to a particular embodiment, these articulation means 22 consist of a mushroom-shaped pin 22-1 with a body 22-2 and a head 22-3 . The pin 22-1 is integral with the securing means 24 to the lower leg J. The upper end 16-1 of the rigid rod 16-3 comprises the other part of the articulation means 22, namely a longitudinal slot 16-4. This light has a width less than the diameter of the head, over at least part of its periphery. Thus, the body 22-2 of said pin 22-1 slides in this longitudinal slot 16-4 while the head 22-3 of said pin retains said upper end 16-1 of the rigid rod 16-3 of said tibial connection 16. upper end 16-1 of the tibial connection 16 can then pivot and move in translation relative to the securing means 24 which are in no way stressed relative to the lower leg J.

In fact, the fastening means 24 of the fastening means 18 of the tibial connection can be placed higher on the lower leg J, that is to say below the knee, in the upper part of the tibia, without inconvenience. . In the prior art, the higher the positioning of the tibial connection, the greater the movements of the fixing means with respect to the lower leg. This is no longer the case with the present invention and the articulation means 22 interposed between the at least one rigid rod 16-3 of the tibial connection 16 and the fixing means 18 of said tibial connection 16 on the lower leg J make it possible to position the securing means 24 between the lower part of the lower leg J and the upper part of the lower leg J, therefore preferably in the upper part, this provided that the at least one rigid rod 16-3 is of the appropriate length. The advantage of positioning the securing means with the at least one rigid rod 16-3 of great length, is to provide the skier S with better control of his flexion and of the movements of the foot P and to have efforts transmitted to the tibia less important for a given bending moment due to the increase in the length of the reduction lever arm. Preferably, a rigid rod 16-3 is provided on each side of the lower leg J so as to have for each shell 14 two right and left rigid rods, attached to the same fastening means 18 and therefore to the same means of subjection 24, including when it is a single hemi-enveloping rod. Articulation means 22, other than a pin in a slideway, can be envisaged, including a simple flange in which the upper end of the corresponding rigid rod slides. The flange then being of rectangular section and the end of the rod also being rectangular but of slightly less width and of sufficiently less length, the clearance is sufficient to allow translation and a given angular rotation. It can be seen that the problem of continuous movements and the stresses of the fixing means 18 is solved and that even if the axes CC' and AA' are not aligned, the offset is compensated for by the articulation means 22, providing all the comfort on this part of the connecting device.

It is also noted that, when the means of articulation comprise two degrees of freedom, therefore translation and rotation, the support on the pin 22-1, in this case, is exerted on all of the securing means because the pin exerts its force radially so that the force is distributed over the entire surface of the means of securing, in a homogeneous manner and not a punctual force which acts in an unbalanced manner on the top or on the bottom of the means of securing in the prior art arrangements. This also leads to the improvement of the comfort thanks to this distribution of the forces.

It is understood that the connection device 10 according to the present invention finds application to shells with tibial connection of the prior art, to shoes with tibial connection and to the footwear assembly described below.

The many problems linked to the presence of a shell with the weight, the constraints on the astragalus, on the malleolus, the constraints linked to the tightening of the shell, the confinement of the foot with the sealing to the evacuation of perspiration , in particular, are on the other hand not solved by the connecting device according to the present invention. Since the connecting device according to the present invention can be put in place with the articulation means 22, the present invention proposes a footwear assembly, equipped or not with said connecting device 10, which solves the problems mentioned above and not solved by the connecting device.

In this same figure 2, in the lower part, a footwear assembly 30 according to the present invention has been described which incorporates the connecting device 10 of the lower leg J with a ski binding F. The invention also covers the footwear assembly integrating said connecting device 10 of the lower leg J with a ski binding F, the footwear assembly eliminating the shell A14 of the prior art. Thus, the footwear assembly 30 comprises a base sole 32 intended to receive a shoe 34. This base sole 32 comprises at least one lateral lug 32-1, substantially vertical, the end of each lateral lug 32-1 being intended to receive the pivot link 20 of each rigid rod 16-3. The end of each lateral lug 32-1 rises substantially in line with the axis CC' of the ankle of the skier S, having worn shoes, so that the axis AA' coincides with or at least close to the axis CC '. This base sole 32 comprises, at the front and at the rear, ends 32-2 and 32-3 respectively, having a profile matching that of the ski binding F which receives it.

According to the invention, in the footwear assembly 30 of the present invention, the foot P is housed in a light shoe 34, itself comprising an upper 34-1 enveloping the foot, of comfort in leather for example and a rigid sole 34-2. The rigid sole 34-2 is advantageously a very stiff sole, like the soles of bicycle shoes for automatic pedals. This rigid sole 34-2 comprises a first part 36-1 of removable fastening means 36, the second part 36-2 of these removable fastening means 36 of which is carried by the base sole. The light shoe 34 can therefore be removably fixed to the base sole 32. The removable fixing means 36 can be screws, snap-fasteners, slides or any similar means, at the front and at the back of the sole. The foot P is held in the lightweight shoe by any known means for closing the upper, such as laces, micrometric thread closures or even hook closures.

The footwear assembly 30 therefore comprises a base sole 32 comprising, in the preferred embodiment, two lateral lugs 32-1, right and left, a tibial connection 16 with two rigid rods 16-3, right and left, connected between they or being a single monolithic rigid rod in a hemi-enveloping form. Each rigid rod 16-3 is articulated in the lower part 16-2 around its own pivoting connection 20, right and left, defining the axis AA'. Each rigid rod 16-3 is connected by its upper end 16-1, right and left to the means of attachment 18 and more particularly to the means of articulation 22 of the means of securing 24 of said means of attachment 18 to the lower leg J.

This footwear assembly 30 is completed by at least one waterproof envelope 38, of tubular shape with a shaft 38-1, a lower opening 38-2 and an upper opening 38-3. The material used is preferably a waterproof fabric. The barrel 38-1 can be made in shape, that is to say to the profile of the light shoe and of the lower leg J. The lower opening 38-2 has a profile adapted to the peripheral shape of the base sole 32 in order to be able to ensure a mechanical and sealed connection between said lower opening 38-2 and said base plate 32. The upper opening 38-3 can be linked to the fixing means 18, in particular to the securing means 24. for footwear, for example a rear opening of the zipper type, can be provided, more particularly along a vertical longitudinal line. This zipper may advantageously be waterproof. A front opening is also possible.

This footwear assembly can also be fitted with an insulating layer 39, shown very partially in FIG. 2, which can be a lining fixed by gluing or removable from the waterproof envelope 38 or an envelope in its own right. This insulating layer 39 provides thermal insulation.

In order to be able to ventilate the interior of the sealed envelope and to allow the feet to breathe, perforations are preferably provided in the lightweight shoe. The natural ventilation within the sealed envelope 38 ensures circulation on the one hand because said sealed envelope remains flexible and a circulation space is provided and on the other hand because, during the permanent bending movements, there is an effect continuous suction/blowing. If necessary, other options can be envisaged, in particular if the envelope is tight-fitting, waterproof and insulating like a neoprene material could be, then it is necessary to be able to ventilate the interior and a mechanical pump can be installed such as a pear with a valve which breathes inside the air sucked in from the outside, driving out the humid air, this with each movement of flexion which is incessant during the practice. Any solution remains possible, also technical materials, waterproof and breathable at the same time.

The skier therefore wears a light boot attached and secured to the base sole 32. The means of attachment 18 to the lower leg J, secured to said base sole in the lower part, in an articulated manner thanks to the pivot links 20, in the lower part , provide control of the base sole 32, this protected from moisture and cold outside. The forces are thus exerted on the base sole 32 and not on the sides of the shoe when the rigid uppers are attached thereto. The flexion can be limited angularly in particular by the stroke of the articulation means 22, so that angular stops, front and rear, can be positioned on the ears for example. The choice of the race is linked to the physiological possibilities and to the approval of the practice. This makes it possible to improve the control of the ski by the skier.

According to an improvement, see figure 3, it is also possible to provide an improvement in the control of the skis by the skier thanks to damping means 40, interposed between the base sole 32 and at least one of the rigid rods 16-3 of the means of connection 16. Such damping means 40 can take any form, in particular that of a mechanical spring cylinder housed in two cylindrical half-bodies capable of sliding coaxially, but can also be more sophisticated such as a gas cylinder, an oil cylinder, a cylinder mixed or a two-cylinder coupling. The forces are significant because of the lever arms involved. Such damping means make it possible to further improve the control of the skis by the skier during practice and in particular during the descent. The shock absorber means can also be disengaged during prolonged stops when skiing downhill or when climbing with touring skis. During the descent, in both disciplines, the shock absorbers are in service for good control. Disengagement is done without tools. According to a particular arrangement, the damping cylinder could also be placed on the front. Likewise, instead of two rigid rods, right and left, a single semi-enveloping rigid rod would be totally equivalent and this semi-enveloping rigid rod could come on the front and not on the rear.

According to an improved embodiment, it is also possible to adjust the coincidence of the axis AA' with the axis of rotation of the peg CC' by means 42 for adjusting the coincidence of the axis AA' with the axis rotation of the ankle CC'. For this purpose, the axis 20-1 of the pivot link 20 is mounted on coincidence adjustment means 42 of the eccentric type 20-2, see FIG. perfect, a double eccentric assembly allows adjustment in the plane. Thus, by turning the eccentric in its ring, it is already possible to adjust the position of the axis 20-1 of the pivot connection, which further improves comfort by virtually eliminating the movements of the articulation means 22 by coincidence of the axes AA' and CC'. Therefore, the articulation means 22 could be put in place with very limited amplitudes in the footwear assembly 30 according to the present invention. It should be noted that, in this case, the footwear assembly 30 of the present invention makes it possible to maintain free visual access and contact with the ankle and therefore to be able to ensure the adjustment in an optimized manner with respect to the morphology of the skier to arrive to an almost perfect coincidence, especially with a double eccentric. Once the adjustment has been made, locking means maintain the eccentric or the double eccentric in the determined angular position.

A variant of the coincidence adjustment means 42 of the axis AA' with the axis of rotation of the pin CC' is visible in FIG. 5. This variant comprises slots 20-4 crossed at 90°, is another possibility adjustment. In this case, a 20-5 plate carries the axis 20-1 of the pivot connection and a set of lights 20-4 and the lug 32-1 carries another set of lights 20-4 crossed at 90°, allows an adjustment of the position of the axis 20-1 of said pivot link 20 to obtain the desired coincidence. This arrangement corresponds to the possibilities of movement of the double eccentric of the previous variant, without these arrangements being limiting.

The representations of the connecting device and of the footwear assembly remain schematic but could be aesthetically and aerodynamically modified without departing from the scope of the present invention. It can be seen that the width of the device is extremely reduced compared to shells.

Claims (10)

Connection device between the lower leg J of a skier S with a foot P and an ankle axis CC', on a ski binding F mounted on a ski board PS, comprising a footwear assembly (30), a tibial connection (16) with at least one rigid rod (16-3), said at least one rigid rod comprising an upper end (16-1) comprising means of attachment (18) to the lower leg J, including securing means (24) and a lower end (16-2) comprising a pivot connection (20) along an axis AA' relative to said footwear assembly (30), characterized in that it comprises articulation means (22) having at the least one degree of freedom, interposed between the upper end (16-1) of said at least one rigid rod (16-3) and the means of attachment (18) to the lower leg J. Connecting device between the lower leg J of a skier S and a ski binding F mounted on a ski board PS, according to claim 1, characterized in that the articulation means (22) comprise a degree of freedom in translation. Connecting device between the lower leg J of a skier S and a ski binding F mounted on a ski board PS, according to claim 1 or 2, characterized in that the articulation means (22) comprise a degree of translational freedom and one degree of rotational freedom. Connecting device between the lower leg J of a skier S and a ski binding F mounted on a ski board PS, according to any one of the preceding claims, characterized in that the articulation means (22) comprise a pawn (22-1) in the shape of a mushroom with a body (22-2) and a head (22-3), secured to the securing means (24) to the lower leg J and comprising a longitudinal slot (16-4 ) formed at the upper end (16-1) of the rigid rod (16-3), through which the body of the said pin passes, this slot having a width less than the diameter of the head, so that the body (22 -2) of said pin (22-1) slides in this longitudinal slot (16-4) while the head (22-3) of said pin retains said upper end (16-1) of the rigid rod (16-3) of said tibial connection (16). Footwear assembly (30) equipped with the connecting device (10) between the lower leg J of a skier S and a ski binding F mounted on a ski board PS, according to any one of Claims 1 to 4, characterized in that it comprises a base sole (32) intended to receive a shoe (34), said base sole (32) comprising at least one lateral lug (32-1), substantially vertical, the end of each lateral lug (32-1) being intended to receive the pivot link (20) of each rigid rod (16-3). Footwear assembly (30) according to Claim 5, characterized in that the end of each lateral lug (32-1) rises substantially in line with the axis CC' of the skier's ankle S, so that the axis AA ' or at least close to the axis CC'. Footwear assembly (30) according to Claim 5 or 6, characterized in that the base sole (32) comprises, at the front and at the rear, ends (32-2) and (32-3) respectively, having a profile combined with that of the F ski binding. Footwear assembly (30) according to claim 5, 6 or 7, characterized in that the lightweight shoe (34) comprises a rigid sole (34-2) provided with a first part (36-1) of removable fastening means (36), the second part (36-2) of these removable fixing means (36) being carried by the base sole (32). Footwear assembly (30) according to any one of Claims 5 to 8, characterized in that it comprises at least one waterproof envelope (38), of tubular shape with a shaft (38-1), a lower opening (38- 2), an upper opening (38-3) and an opening for footwear. Footwear assembly (30) according to any one of Claims 5 to 9, characterized in that it comprises means (42) for adjusting the coincidence of the axis AA' with the axis of rotation of the ankle CC'.