EP2737815B1 - Adaptable sports shoe - Google Patents

Description

The invention relates to a shoe intended to be retained reversibly to a sports machine, and more particularly to a shoe intended for the practice of a snow sport.

This shoe can be used in areas such as cross-country skiing or telemark skiing, snowshoeing, or whatever.

A shoe of this family comprises an outer sole, a rod and an attachment element, the latter being provided to cooperate with a locking mechanism itself intended to be subject to the machine. The hooking element and the locking mechanism are a hooking means which, very often, is provided to hold the boot on the machine in a reversible manner.

For example, in the field of cross-country skiing, it is usual for each locking mechanism to either hold a shoe or release it. This allows the choice to drive the skis or walk.

We have shown in figure 1 a known set which comprises a shoe 1, a ski 2 and a retaining device 3 of the boot on the ski.

The retaining device 3 comprises a base 4, which carries a reversible locking mechanism 5, an elastic return mechanism 6, and a longitudinal guide edge 7. It is for example possible to secure the locking mechanism 5, the locking mechanism. return 6 and the guide edge 7 to the base 4, so that the retaining device 3 is consistent.

As regards the shoe 1, it comprises an outer sole 12 and a rod 13.

The boot 1 further comprises a fastening element 25, the latter being provided to cooperate with the retaining device 3 itself intended to be secured to the ski 2. The fastening element 25 cooperates with the locking mechanism 5 and with the elastic return mechanism 6.

The sole assembly 12, shown in more detail in a bottom view in figure 2 also extends in height, or in thickness, between an outer face 18 and a connecting face 19. The outer face 18 is intended to be turned towards the ground, the retaining device 3, or the ski 2.

The connecting face 19, meanwhile, serves to secure the sole 12 to the rest of the shoe by gluing.

The attachment element 25 is connected to the outer sole 12, so that it can optionally be secured to the latter, or be separated.

As explained in the document FR 2968898 , it is possible at will to disassemble and reassemble the attachment element 25, more precisely the son 26, 27, for example to replace or to change its position relative to the sole assembly 12. The document EP 0815756 also discloses such a shoe with matching means which are removably attached relative to the base. This type of shoe, and, in general, known shoes, have a limitation that is that of an impossibility to adapt to different types of equipment. In In particular, two large families exist in the field of cross-country skiing, the NNN® type family ("New Nordic Norm") and the SNS® type family ("Salomon Nordic System"). A boot equipped with means of binding to skis of one of the two types above can not be used for the other type, imposing on the user the possession of two pairs of shoes if he wants to freely use both types of skis.

Another problem is that of the longitudinal flexibility of the shoe along a transverse axis thereof. This flexibility is imposed by the manufacture of the shoe and a user can not adjust it according to his needs.

Yet another problem is the number of molds to make to make a sole for this type of shoe. Indeed, this number is between about 8 and 15 depending on the number of sizes to be produced, each mold having an indicative unit cost of between 10 and 40 k €.

Yet another problem lies in the wear of the parts that are in contact with the ground, the ski or the racket. The wear of these parts requires the replacement of the shoe as a whole,

In relation to this, the present application describes a shoe intended for the exercise of a physical activity using a sliding or rolling machine, for example a ski or a snowshoe, in which the heel of the shoe is free during the movement of the foot, the front end of the shoe being provided with a fastening element to the machine, this shoe comprising a base, the shoe further comprising adaptation means, comprising a first part, to be fixed in a front zone of the base of the boot, with respect to a direction of extension of the foot, and a second part, to be fixed in a rear zone of the base of the boot, relative at said extension direction of the foot, each of which can be detachably attached to the base, the base forming a flat surface.

This shoe is characterized in that said first portion and said second portion are connected by a flexible blade, that the bending blade is flat or further comprises walls, and possibly a buttress portion, to maintain the rear portion of the upper of a shoe, that the boot further comprises removable means for varying the flexibility of the base or flexion blade, that the means for varying the flexibility of the base or flexion blade comprise one or more inserts / or one or more rods and / or one or more plates or blades to be inserted in said base or against it, and that it comprises means for fixing, by screwing or by means of slides or by clipping, the means of adaptation relative to the base, according to a position or in several positions, discrete or continuous. It is for example to adapt the shoe to a first type of contact interface with the machine, or to a second type of contact interface with the machine, different from the first type of contact interface, or any other type of interface.

The first type of contact interface may be with a single longitudinal edge, the first portion and / or the second portion of the adaptation means each having a longitudinal groove for receiving at least a portion of said single longitudinal edge.

The second type of contact interface may be with at least two longitudinal edges, or even n longitudinal edges, n being greater than two, the first part and / or the second part of the adaptation means each comprising at least two, or n, longitudinal grooves, each groove being intended to receive at least a portion of one of the two, or n, longitudinal edges.

According to other examples, at least one contact interface comprises at least one transverse edge and / or at least one stud, the first part or the second part of the adaptation means comprising at least one transverse groove or at least one orifice, each groove or each orifice being intended to receive a transverse edge or a stud.

The base of the shoe may have flexibility in a direction of extension of the foot.

The base may comprise a flexion blade, this flexion blade having flexibility in a direction of extension of the foot and means for fixing against said blade, said adaptation means.

The base, or flexion blade, may be substantially flat or further comprise walls, and possibly a part forming a buttress, to maintain the rear part of the upper or the boot of a shoe. In a nonlimiting manner, the buttress is an external subdivision of the shoe. However it could alternatively be expected to cover the buttress with another element and, therefore, the buttress would be set back from the outside of the shoe.

Removable means may also be provided to vary the flexibility of the base or flexion blade, these means comprising for example one or more inserts / or one or more rods and / or one or more plates or blades to be inserted in said base or against it.

Means may be provided for fixing, for example by screwing or with the aid of slides or by clipping, the adaptation means relative to the base, according to a position or in several positions, discrete or continuous.

In a particular embodiment, at least one contact interface comprises a surface of the machine itself, the first part and / or the second part of the adaptation means comprising at least one longitudinal groove. Each groove may have a width at least equal to the width of the machine.

In a more general manner, the first part and / or the second part of the adaptation means has a cross section whose profile is complementary to a profile of a cross section of a retaining device, an element interface between the shoe and gear, or even the craft itself. It is in all cases to adapt the shoe to the machine.

The invention also relates to a shoe, provided for the exercise of a physical activity using a sliding or rolling machine, in which the heel of the shoe is free during the movement of the foot, the front end of the shoe being provided with a fastening element to the machine, this shoe comprising a base, and adaptation means, to be fixed removably in a front zone of the base of the boot, with respect to a direction of extension of the foot, to adapt the boot to a first type of contact interface of the machine, or to a second type of contact interface of said machine, different from the first type of contact interface, the part rear of the base being adapted to rest directly or indirectly on a contact interface surface of the machine. This means that the base may, depending on the configuration, rest directly on the machine or, alternatively, rest on an interface plate, on the base of a retainer, or on both the plate and the base if these the last ones are superimposed.

The front part and the rear part of the adaptation means can be of different heights.

The front portion and / or the rear portion of the adaptation means may have a surface intended to come into contact with the base, making a non-zero angle with the opposite surface, intended to come into contact with or to be turned towards the craft. This set is done following at least one direction.

In a shoe as described above or as described in one of the above variants, said adaptation means may comprise first removable means for adapting the boot to the first type of contact interface of a ski or a racket or other gear, and second removable means for adapting the shoe to the second type of contact interface of a ski or racket or other gear.

A shoe as described above may be of the shell type, in one, two or three parts, receiving a boot or mounted rod, for example with front and / or removable end cap relative to the base. It may also be a mounted rod or Strobel type receiving a glued base, receiving itself the adaptation means.

In general, the contact interface of the machine may comprise a retaining device or attachment of the shoe, provided to cooperate with the front end thereof, or may be a surface of the machine itself.

• la figure 1 est une vue en perspective avant d'un ensemble qui comprend une chaussure, ainsi qu'un ski représenté de manière partielle et un dispositif de retenue de la chaussure sur le ski,
• la figure 2 est une vue en perspective avant par dessous du semelage externe de la chaussure de la figure 1,
• les figures 3A et 3B illustrent un mode de réalisation de l'invention,
• les figures 3C et 3D illustrent d'autres modes de réalisation des moyens amovibles avant,
• les figures 4-6 illustrent d'autres modes de réalisation de l'invention,
• les figures 7A, 7B représentent des éléments avant et arrière prévus pour un ski de type NNN®,
• les figures 8A, 8B sont des vues arrière d'une chaussure équipée selon les deux types de familles, SNS® et NNN®,
• les figures 8C, 8D sont des vues avant d'une chaussure équipée selon les deux types de familles, SNS® et NNN®,
• la figure 9 est une vue en perspective avant d'un ensemble qui comprend une chaussure, ainsi qu'une embase et des moyens amovibles selon l'invention,
• les figures 10A, 10B illustrent divers moyens amovibles selon l'invention, en coopération avec une embase flexible,
• les figures 11A, 11B, 12 représentent des moyens amovibles selon l'invention, en réalisation monobloc,
• les figures 13A, 13B, 13C représentent des embases flexibles avec des moyens d'adaptation de la flexibilité,
• les figures 14A, 14B, 14C, 14D, 14E, 14F, 14G, 14H représentent d'autres types de chaussures auxquelles l'invention peut être appliquée,
• les figures 15A, 15A1, 15B représentent d'autres configurations de ski et de moyens d'adaptation selon l'invention, de même que les figures 16A-16B et figures 17A, 17B, 17C, 17D,
• les figures 18A-18B représentent des moyens d'adaptation selon l'invention, avec des parties avant et arrière de hauteurs différentes,
• les figures 19A, 19B, 19C représentent des moyens d'adaptation selon l'invention, avec des parties avant et arrière pouvant présenter une inclinaison, suivant au moins une direction,
• les figures 20A, 20B, 20C représentent un autre mode de réalisation de l'invention,
• les figures 21A, 21B représentent une variante des moyens d'accrochage.

Other features and advantages of the invention will be better understood from the following description, with reference to the accompanying drawing illustrating, according to non-limiting embodiments, how the invention may be implemented and in which:

• the figure 1 is a front perspective view of an assembly comprising a shoe, and a ski partially shown and a device for retaining the boot on the ski,
• the figure 2 is a front perspective view from below of the outer sole of the shoe of the figure 1 ,
• the Figures 3A and 3B illustrate an embodiment of the invention,
• the Figures 3C and 3D illustrate other embodiments of the removable means before,
• the Figures 4-6 illustrate other embodiments of the invention,
• the Figures 7A, 7B represent front and rear elements provided for an NNN® type ski,
• the Figures 8A, 8B are rear views of a shoe equipped according to the two types of families, SNS® and NNN®,
• the Figures 8C, 8D are front views of a shoe equipped according to the two types of families, SNS® and NNN®,
• the figure 9 is a perspective view before an assembly that comprises a shoe, and a base and removable means according to the invention,
• the Figures 10A, 10B illustrate various removable means according to the invention, in cooperation with a flexible base,
• the Figures 11A, 11B , 12 represent removable means according to the invention, in one-piece construction,
• the Figures 13A , 13B, 13C represent flexible bases with means for adapting the flexibility,
• the Figures 14A, 14B, 14C, 14D , 14E, 14F, 14G, 14H represent other types of footwear to which the invention may be applied,
• the Figures 15A, 15A1, 15B represent other ski configurations and adaptation means according to the invention, as well as the Figures 16A-16B and Figures 17A, 17B, 17C, 17D ,
• the Figures 18A-18B represent adaptation means according to the invention, with front and rear parts of different heights,
• the Figures 19A, 19B, 19C represent adaptation means according to the invention, with front and rear parts that can have an inclination, along at least one direction,
• the Figures 20A, 20B , 20C represent another embodiment of the invention,
• the Figures 21A, 21B represent a variant of the attachment means.

The embodiments of the invention described herein relate more specifically to shoes for cross-country skiing, ski touring, telemark, or snowshoeing. However, the invention applies to other fields, such as for example the ice skate or the wheel skate. In the case of a ski, it may possibly be equipped with wheels, such as wheels 230, 231 that can be seen in figure 15A1 .

In the following, we can refer to a ski boot that has a structure of different types. According to one example, this structure may be identical or similar to that already described in connection with the figure 1 , except for the part under the stem and turned towards the skis.

• la chaussure 1 comprend un semelage, ou embase externe 12, et une tige 13, ces deux éléments étant assemblés par exemple par collage, ou rivetage ou vissage ou être, au moins en partie, intégrés dans une même pièce, qui peut être par exemple moulée en matériau thermoplastique ou composite. L'embase 12 peut comprendre une partie, deux parties, ou plus. La chaussure 1 s'étend en longueur depuis une extrémité arrière ou talon 14 jusqu'à une extrémité avant ou pointe 15, et en largeur entre un côté latéral 16 et un côté médial 17. L'embase 12 s'étend également en longueur, depuis le talon 14 jusqu'à la pointe 15, et en largeur entre le côté latéral 16 et le côté médial 17,
• la tige 13 comporte une portion basse 20, prévue pour entourer le pied, et, éventuellement, une portion haute 21, prévue pour entourer la cheville. La tige peut comporter seulement la portion basse,
• un élément d'accrochage 25 est prévu pour coopérer avec le dispositif de retenue 3, en particulier le mécanisme de verrouillage 5, lui-même prévu pour être assujetti au ski 2, et éventuellement avec un mécanisme de rappel élastique 6,
• le dispositif de retenue 3 comprend une embase 4, laquelle porte un mécanisme de verrouillage réversible 5, éventuellement un mécanisme de rappel élastique 6, et, dans l'exemple illustré en figure 1, une arête de guidage longitudinal 7 ; le mécanisme de verrouillage 5, l'éventuel mécanisme de rappel 6 et l'arête de guidage 7 peuvent être solidarisés à l'embase 4.

The structure of the figure 1 comprises a shoe 1, a ski 2 and a retaining device 3 of the boot on the ski:

• the shoe 1 comprises a sole, or external base 12, and a rod 13, these two elements being assembled for example by gluing, or riveting or screwing or be, at least partly, integrated in the same room, which may be for example molded thermoplastic or composite material. The base 12 may comprise one part, two parts, or more. The shoe 1 extends in length from a rear end or heel 14 to a front end or tip 15, and in width between a lateral side 16 and a medial side 17. The base 12 also extends in length, from the heel 14 to the tip 15, and in width between the lateral side 16 and the medial side 17,
• the rod 13 comprises a lower portion 20, provided to surround the foot, and possibly an upper portion 21, provided to surround the ankle. The stem may only include the lower portion,
• a hooking element 25 is provided to cooperate with the retaining device 3, in particular the locking mechanism 5, itself intended to be secured to the ski 2, and possibly with an elastic return mechanism 6,
• the retaining device 3 comprises a base 4, which carries a reversible locking mechanism 5, possibly an elastic return mechanism 6, and, in the example illustrated in FIG. figure 1 a longitudinal guide edge 7; the locking mechanism 5, the possible return mechanism 6 and the guide edge 7 can be secured to the base 4.

The invention also applies to other types of shoes, in particular to the types of shoes illustrated on the Figures 14A-H , or other types of fixation.

So the shoe of the figure 14A comprises a removable front end 220 and a cradle 214 which ensures, in particular, the base function 120 and counterfeit. It is observed in passing that the latter is an external subdivision of the shoe. The tip 220, which in a non-limiting manner has the appearance of a shell, removable and / or adjustable, allows to adapt the shoe to the size of the user. In this set, the user comes to slip a shoe 215 or a shoe, in which his foot is inserted. The tip is slid over the cradle, on which it can then be fixed, for example by being riveted, or screwed, or glued. This tip may be of plastic material and / or composite and / or a flexible material, textile or synthetic.

Alternatively, according to the Figure 14B , the external buttress is also removable: like the tip, it is intended to be fixed on a base or flexion plate 120 (as explained below), and can be disassembled thereof. The blade then itself constitutes the essential of the base.

The shoe of the figure 14C is similar to that of the figure 14A , but has a cradle 214 openwork. This reduces the mass of the shoe, and therefore its mechanical inertia.

According to the embodiment shown in figure 14D , the tip 220, the cradle 214 and the base 120 form a single piece. This has the advantage of simplicity.

On the figure 14E the shoe is devoid of tip. We find only a base 120 and a rear cradle 214, which form a single piece. This embodiment promotes a reversible flexion of the base 120 forward and at the metatarsal level of a foot.

On the figure 14F , the shoe is still devoid of tip. We find the base 120 and the rear cradle 214, which are two separate elements assembled with each other by any suitable means.

On the figure 14G the shoe comprises a base 120, excluding a mouthpiece and a cradle. The shoe also comprises a high upper 13 secured to the base 120 by any means, removably or permanently. The upper rod is well adapted to the technique of the skater's step, for which the user exerts lateral thrusts with the legs.

In a different way, on the figure 14H , the upper of the shoe is low. This is suitable for the alternative step technique.

More generally, the shoe or shoe element concerned by the invention comprises a base which is not necessarily glued against a rod.

In general, the base is intended to receive, on one of its surfaces, either a shoe or structural elements of a rod, themselves intended to receive a shoe or slipper in which the foot of the user is threaded.

In a more particular way, it can be provided that the shoe comprises a base on which is attached a mounted rod. The latter comprises for example a cover of the foot and a first mounting sole intended to close the envelope under the foot, excluding any traditional sole. The mounted rod is secured to the base, by a means such as gluing or any other appropriate means, knowing that very different from the prior art would have led to secure the rod mounted to a sole.

According to the variant embodiment of the Figure 14B , the base comprises a longitudinal flexion blade, a removable cradle and a removable tip. That is to say that the flexion blade, the cradle and the tip are elements assembled together to form the base. In other words, here these elements do not form a single piece.

The base has another surface which is generally turned towards the ground or the vehicle (for example: the ski) and which has an interface function with the adaptation means which will be described.

Such adaptation means 25, 140 are represented in Figures 3A and 3B . Again, the base 12 extends in thickness, between an outer face 18 and a connecting face 19. The outer face 18 is intended to be turned towards the ground, the retaining device 3, or the ski 2.

The connecting face 19, meanwhile, serves to secure the base 12 to the rest of the shoe, for example by gluing (but other methods of attachment or attachment are possible, as already explained above).

According to one embodiment, the adaptation means comprise a front attachment element 25 which comprises a first longitudinal bar 31 and a second longitudinal bar 32, both provided to bear on the base 12. The base could also be designated 120. The first bar 31 extends longitudinally from a first end 33 to a second end 34, and the second bar 32 extends longitudinally from a first end 35 to a second end 36. It is for example provided that the first ends 33, 35 and the second ends 34, 36 of the bars are respectively facing each other transversely.

Each bar 31, 32 comprises for example one or more synthetic materials, such as plastic, rubber, or other.

Each of the bars is provided with at least one orifice, possibly passing through 47 ₁ , 47 ₂ , 47 ₃ , 47 ₄ , for example two through openings, possibly each of them being able to be tapped, to accommodate a screw 47 intended to cooperate with a threaded orifice 48 ₁ , 48 ₂ , 48 ₃ , 48 ₄ of the base. Alternatively, there may be a threaded insert in the base, but also an inverse embodiment, with an internal screwing with thread or threaded insert in the front or rear adaptation means.

Locating pins 43, 44, for example under each bar 31, 32, may further cooperate with corresponding orifices 45, 46 of the base. Each nipple and the corresponding orifice may have a circular section.

The two longitudinal bars 31, 32 described may not be interconnected other than by the attachment son 26, 27. Variants are shown schematically in FIG. Figures 3C, 3D the bars can then be interconnected by a portion 305, 305 'of the same material as the bars, this portion extending in a limited way with respect to the length L _b of the bars 31, 32 (this is the case of the figure 3C ), or over this entire length (this is the case of the 3D figure ). the bars and the portion may form a single piece.

In Figures 3A, 3B is also shown a removable heel 140, which comprises a first longitudinal bar 310 and a second longitudinal bar 320, connected by a bridge formed for example in the form of a flat area 315, set back relative to the outer surface of the heel, so as to cooperate with the single rail of a ski or the retaining device, for example of the SNS® type. This assembly is designed to bear on the external base 12. The first bar 310 extends longitudinally from a first end 330 to a second end 340, and the second bar 320 extends longitudinally from a first end 350 to a first end 340. at a second end 360. It is for example provided that the first ends 330, 350 and the second ends 340, 360 of these bars are respectively facing each other transversely. There is shown here a heel in which the two longitudinal bars 310, 320 are connected over their entire length by a flat area 315. But this area may be smaller compared to the length of this heel.

Each bar 310, 320 is made of one or more synthetic materials, such as plastic, rubber, or the like.

In general, the outer surface of these bars, intended to come into contact with the machine or with means constituting one or more contact interfaces, may be flat and homogeneous, or have notches, as for example illustrated in figure 5 or 7B .

Means make it possible to position the heel in a fixed, but removable, manner relative to the base.

For example, as shown in figure 3A each of the bars is provided with at least one through-hole 470 ₁ , 470 ₂ , 470 ₃ , 470 ₄ , for example two orifices, each of which can be tapped, to accommodate a screw 470 intended to cooperate with a threaded orifice 480 ₁ , 480 ₂ , 480 ₃ , 480 ₄ of the base. Alternatively, there may be a threaded insert in the base, but also a reverse embodiment, with an internal screwing with thread or threaded insert in the front or rear adaptation means.

Positioning studs 430, 440, for example one under each bar 31, 32, may furthermore cooperate with corresponding orifices 450, 460 of the base. Each nipple and the corresponding orifice may have a circular section.

The example represented in Figures 3A and 3B comprises two attachment son 26, 27 in the front part of the adaptation means. However, in this example, as in the others described below, a single hook wire can also be provided.

It is also possible to provide fastening means of different shape, which are not necessarily a pivot type connection with the retaining device, but can be a mechanical connection without rotation.

Alternatively, represented in figure 4 (on which the removable elements are the same as those of Figures 3A and 3B ), the holes of the base 12 may be doubled to allow to adjust the position of the heel and / or the front part.

So, we see on the figure 4 additional openings 48 ' ₁ , 48' ₂ , 48 ' ₃ , 48' ₄ , each being shown a little behind one of the orifices 48 ₁ , 48 ₂ , 48 ₃ , 48 ₄ . The same applies to the orifices 45, 45 ', 46, 46' intended to receive the nipples 43, 44. The set of additional orifices defines a second possible position of the screws and pins of the removable element 25, which can thus be advanced or retracted on the base, as needed. It can be expected a number of positions greater than two, for example three. It is possible to carry out a discrete longitudinal adjustment with two, three or any number of longitudinal positions.

Similarly, we see on the figure 4 additional ports 480 ' ₁ , 480' ₂ , 480 ' ₃ , 480' ₄ , each being shown a little behind one of the orifices 480 ₁ , 480 ₂ , 480 ₃ , 480 ₄ . The same goes for the orifices 450, 450 ', 460, 460' intended to receive the studs 430, 440. The set of additional orifices thus defines a second possible position of the screws and the pins of the removable heel which can thus, he too, be advanced or back on the base, as needed. It can be provided a number of positions greater than two, for example three. It is possible to carry out a discrete longitudinal adjustment with two, three or any number of longitudinal positions.

Another embodiment of the fastening means of the removable parts is shown in FIG. figure 5 . It is designed for continuous adjustment, the movement of the front and rear elements being longitudinally, which increases the possibilities of adjusting the position of the front and rear elements. For example, at least two parallel rails 92, 94, 96, 97 are provided on the base to cooperate with two slides of the front element 25, which can be formed under the first longitudinal bar 31 and the second longitudinal bar 32, the side to be turned towards the base.

In a plane perpendicular to the surface of the base and perpendicular to the direction of elongation of the base, each rail has a substantially inverted "L" configuration, comprising a body perpendicular to the base, and a horizontal portion which will allow, on the one hand, to slide the element 25 on the rail but also to retain it relative to the base. Preferably, the horizontal bar of the inverted "L" is directed towards the outside of the shoe.

Each rail may itself be in two parts 92, 94 and, for the second rail, 96, 97. These two parts are arranged longitudinally, in the extension of one another, being separated by a zone or surface 12 ₁ , set back from the outer surface of the rails turned on the side opposite the rod. This area or surface 12 ₁ may be confused with the outer surface 18 of the base (which has the advantage of less affecting the flexibility of the base). In this area or surface 12 ₁ is provided one or more orifices 109, 110 for screwing. Alternatively, a variant may be provided in which the hole becomes a through hole, such as a light. Each of the longitudinal bars 31, 32 is itself provided with a slot 107, 108 of adjustment, in which a screw 105 can be introduced to be screwed into one of the orifices 109, 110. The slot extends longitudinally, along the corresponding bar, so as to slide the assembly along the rails 92, 94, 96, 97, preferably without completely unscrewing the corresponding screw.

The rails 92, 94, 96, 97 cooperate with slots 101, 102, formed in the longitudinal members 31, 32. These slots open on the ends or rear portions 34, 36, and possibly on the ends or front portions 33 , Longitudinal elements 31, 32. To introduce the element 25, for example, the end of the slots is positioned on the rear end portions 34, 36 of the longitudinal elements 31, 32 opposite the front part of the elements. elements of rails 92, 96, and one pulls on the element 25, in the rear direction of the shoe.

It is the same for the heel 140, the base comprising at least two parallel rails 920, 940, 960, 970 provided to cooperate with two rails of the heel, each slide being formed for example under the first longitudinal bar 310 or under the second longitudinal bar 320, the side intended to be turned towards the base, preferably in the extension of the inner face of the connecting zone 315 of the two bars.

Each rail may be in two parts 920, 940 and, for the second rail, 960, 970 longitudinally elongated, the two parts being separated by an area or surface 12 ₂ , set back from the outer surface of the rails turned to the opposite side at the stem. This area or surface for example 12 ₂ plane may be confused with the outer surface 18 of the base. In this region, for example planar, is provided one or more screw holes 1090, 1100. Each of the longitudinal bars 310, 320 is itself provided with an adjusting slot 1070, 1080, into which a screw 1050 can be inserted to be screwed into one of the orifices 1090, 1100. The slot extends longitudinally, in order to slide the assembly along the rails 920, 970, preferably without completely unscrewing the corresponding screw.

The rails 920, 940, 960, 970 cooperate with slots 1010, 1020 formed in the heel. These slots open on the front and possibly on the back of the heel. To introduce the heel, is positioned for example the end of the slots, located on the front portion of the heel, opposite the rear portion of the rail elements 940, 970, and is pulled on the heel, in the forward direction of the shoe .

The movable elements, that is to say the front and rear portions of the adaptation means, are held against the base, for example by screwing or clipping.

Preferably, the surfaces in contact with each other, that is to say the surface 18 and the surfaces of the longitudinal elements 31, 32 turned towards the base also have coefficients of friction such that the maintenance of these two surfaces is reinforced by a friction effect relative to each other in use. This effect can be obtained by the surface state of the two surfaces in contact with each other and / or by a particular particle size of the material constituting these surfaces.

In a plane perpendicular to the direction of elongation of the base, each rail has a substantially inverted "L" configuration, as already described above, and with the same advantages.

Another embodiment of the fastening means of the removable parts is shown in FIG. figure 6 . It is provided for a two-dimensional adjustment in the plane of the base. Such a setting is preferably carried out continuously, but alternatively may also be in a succession of discrete positions. The displacement of the front and rear elements is then in the longitudinal direction of the shoe and / or in a direction perpendicular to this longitudinal direction, which increases the possibilities of adjusting the position of the front and rear elements. For example, two parallel slots 82, 87 are formed in the front part of the base, in the longitudinal direction of the boot, and two parallel slots 820, 870 are formed in the rear part of the base, also in the direction longitudinal of the shoe. In each of the two removable parts 25, 140 are made slots, respectively 83, 88 (in the front portion 25) and 830, 880 (in the portion 140 forming a heel), parallel to each other and perpendicular to the slots made in the base . The removable elements are fixed against the base by screwing, and / or with means such as retaining notches, or screw-nut type means, or by any means allowing to block the removable elements in a position chosen by the user and unblock to change this position or to remove the removable elements.

In the embodiments of figures 5 and 6 one or position markers may be provided, to allow a user to locate, laterally and / or transversely, a particular setting, for example a setting that suits him for a given shoe type. Thus a lateral scale E _l of adjustment is represented in figure 5 , made in or on the surface 18, parallel to the insertion direction of the longitudinal bars. A transverse scale E _t of adjustment is represented in figure 6 , made in or on the surface 18, perpendicular to the insertion direction of the longitudinal bars. One or more position marks may be present to locate the position of the front portion of the adapter member (as shown in FIG. figures 5 and 6 ) and / or the rear part of the adapter element.

The various embodiments given above in connection with the Figures 3A - 6 are intended for use with a particular type of ski, the SNS® family, with a monobloc rail 7 (or guiding edge).

To make it possible to use the same shoe with the other family, the preceding elements 25, 140 are replaced by corresponding elements adapted to the other family.

Indeed, a removable heel and a removable attachment element can also be structured to cooperate with the two edges of a NNN® type of retention device. These two edges form, at least in the part with which the heel comes into contact, longitudinal guiding means.

A heel 140 of this type is represented in Figure 7A . It comprises a first longitudinal bar 310, a second longitudinal bar 320, and a third longitudinal bar 333, disposed between the first longitudinal bar and the second longitudinal bar and separated from them, respectively by a first longitudinal groove 131 and a second longitudinal groove 132. These grooves are provided to cooperate with the rails of a retaining device of the NNN® family.

Means make it possible to position this heel in a fixed, but removable, manner with respect to the base. They may be of the same type as described above in connection with the figure 3A : one or holes, possibly through holes 470 ₁ , 470 ₂ , 470 ₃ , 470 ₄ , optionally threaded, made for example in the longitudinal bars 310 and 320. Optionally, locating pins 430, 440 may furthermore cooperate with orifices 450, 460 corresponding to the base, as already described above. There again, each nipple and the corresponding orifice may have a circular section. Alternatively, the means for positioning the bead in a fixed manner, but removable, relative to the base may be of the same type as described above in connection with one of the Figures 4, 5 or 6 .

The corresponding front part 25 is represented in Figure 7B . A single hooking wire 26 is positioned in the front position. The front portion has a first longitudinal bar 31, a second longitudinal bar 32, and a third longitudinal bar 37, arranged between the first longitudinal bar and the second longitudinal bar and separated therefrom respectively by a first longitudinal groove 31 'and a second longitudinal groove 32'. These grooves are provided to cooperate with the rails of a NNN® type holding device. Means make it possible to position this front part fixedly, but removably, with respect to the base. They may be of the same type as described above in connection with the figure 3A , or with one of Figures 4, 5 or 6 .

On each of the Figure 8A and 8B , a rear view of the shoe, on which the removable heel 140 is mounted. We see, clearly, the difference in structure that allows, for each of these heels, to be adapted to a particular type of ski. The Figures 8C and 8D are front-facing views, which correspond respectively to Figures 8A and 8B . We find the elements already described above.

Elements of the type illustrated and described above in connection with the Figures 7A - 7B , adapted to the NNN® family, can be adapted to the various attachment means which have already been described above in connection with the Figures 3A - 6 , which makes it possible to give them, optionally, an adjustable character, in a discrete manner ( figure 4 ) or continue ( figures 5 and 6 ).

The above embodiments are intended to be fixed directly on the base.

According to another embodiment, a base 200 accommodates a liner and / or a rod and / or rod structure elements of a shoe, as illustrated in FIG. figure 9 . Reference 210 designates a collar provided with a strap 211 for holding the boot. This strap can be opened or closed using means such as, for example, self-gripping surfaces. On the heel side, the base 200 is provided with two substantially vertical walls, 201 (side wall), 203 (medial wall), which will allow to maintain the rear part of the rod and, more particularly, to block any torsion of the foot. These two vertical walls can be unassembled or, conversely, be extended, behind, by a portion (rear axle) which joins the rear parts of the walls 201, 203 of the shoe rearward substantially in the shape of the back part of the stem. The walls 201, 203, can extend, in the longitudinal direction of the foot, along a length L, which can reach for example 70% or 75% of the length of the shoe (from the rear end of the shoe ) or the total length of the base 200, which corresponds substantially to the position of the metatarsals. When the boot or bootie is inserted into this base, two orifices 202, 204 make it possible to introduce means such as rivets, or screws, which cooperate with corresponding orifices of the boot and the corresponding orifices of the collar 210 to maintain together or to help maintain the whole. A holding strap 211 'of the rod on the base may also be present in front of the base; this strap can be opened or closed by means such as, for example, self-gripping surfaces. The rod can also be held in or on the base by gluing, screwing or riveting.

The removable parts, front and rear, described above, can then be fixed to the outer surface of the base 200, with means identical or similar to what has been indicated above, in particular screws and possibly positioning nipples. The blade is itself provided with corresponding orifices, some of which may be threaded to cooperate with the corresponding screws.

It has been shown, in Figures 10A-10B , the various means for holding the elements 25, 140, already described above, but in connection with a base 200 whose lower or outer face 18 facing the machine or the ground becomes the base 12 described above ( the latter then forming the essential part of the base). The more detailed explanations are those already given above in connection with the Figures 4-6 . Here again, elements 25, 140 intended for a NNN® family or intended for an SNS® family or for any other family or device for retaining the machine may be adapted.

In a variant, the base does not have walls 201, 203, or buttresses, and thus forms a substantially flat surface, or extending in two dimensions in the manner of a flexion blade, and intended to be fixed, it also removably against a liner and / or a rod and / or rod structure elements. This base or flexion blade then has substantially the shape shown in FIG. Figures 3A - 6 , replacing the material of the base described above for these figures by the material of the flexion blade. The front and rear portions of the adaptation means described above in connection with these Figures 3A - 6 , are then intended to be fixed against this blade.

Two removable parts have been described above forming two separate pieces.

But we can achieve, in a variant, a single piece intended to be applied against the base or the flexion blade; such a piece is represented in Figures 11A and 11B . On the latter, it can be seen that the means for holding the two parts 25, 140 relative to the base 12, or to the base 200, are the same as those already described above in connection with the figure 3A . The two parts 25, 140 are interconnected by a base or flexion blade 120, which has a certain flexibility to accompany the movement of the user. This assembly is compatible with a mode of attachment to a position, on the base, as in figure 3A , or two or more discrete positions, as in figure 4 . It is also possible to provide, even if not shown, a mode of attachment with continuous position adjustment. The base is for example a metal material and / or composite and / or plastic and / or comprising plant fibers.

We can also realize, as illustrated in figure 12 , an assembly comprising two parts 25, 140, of the type of that of the figure 5 , they also connected by a base 120, the assembly can be used in cooperation with a base of the type of the figure 5 .

In the same way, the two parts 140, 25 of the figure 6 can be connected by a base to form a single piece.

In the various variants which have just been described, the connecting element 120 has an extension, towards the front, which is limited in order not to interfere with the strings 26, 27 of attachment intended to cooperate with the device of restraint 3 (see figure 1 ).

Each of these different monobloc variants can be fixed to a base 12, as already described above.

The base of the figure 9 , as the base 12, has a certain longitudinal flexibility along a transverse axis of the shoe. It can be folded to accompany the movements of the foot. It may be necessary to adapt this flexibility. We can change the first base and choose a second base with another flexibility (stiffer or more flexible than the first). But we can also provide a base adaptable flexibility.

The invention provides for this purpose reinforcing means such as inserts or rods, which can be introduced into orifices extending longitudinally, or offset angularly with respect to the longitudinal direction, in the base, as shown in FIG. figure 13A , on which we see a base 200, and orifices 219, 221 which allow to slide reinforcing means 222, 223 in areas intended to collaborate with these reinforcing means, formed in the base itself. These zones are in the extension of the openings 219, 221. In a variant, such openings may be made on the rear face. The longitudinal openings may be oriented in a longitudinal direction Lo of the base, or may form with this direction an angle γ whose value is between 0 and 40 °. As a further variant, an opening 224, on the front or rear face, accommodates a reinforcing element 225 here having the shape of a rectangular plate, as illustrated in FIG. Figure 13B . The plate, whose shape may be arbitrary, may also be disposed either above or below the base 200. In another variant, a reinforcing element may be a plate or a blade 227, possibly perforated, such as illustrated in figure 13C , and intended to be pressed against the upper or lower face of the base, for example on the zone on which the front part (as in figure 13C ) or the rear part of the adaptation means are to be fixed, or between these two zones, as represented by the reference 227 'on the figure 13C . These reinforcing means may be adapted to such a blade, that it is provided in combination with removable elements 25, 140, as already described above, or with any other means of connection with the ski.

Both connecting means, which connect the fastening element 25 to the base 12, the removable heel, will allow an adaptation of the shoe to any type of ski.

In all the embodiments that have been discussed above, the front and back elements to be fixed on the outer surface of the base are compatible with the NNN® family or the SNS® family.

But the invention also relates to other restraints or other types of equipment.

For example, there may be n parallel edges (n> 2), instead of the two edges of the device with which the elements of Figures 7A and 7B cooperate.

For example again, as illustrated in figure 15A , the front interface area of the retaining device may be provided with one or more transverse ridges 70, 71, oriented perpendicular to the extension direction of a ski. Optionally, the position of these transverse ridges is adjustable along the extension direction of the ski. One or more other transverse edges 72, 73 may be provided in the rear interface area. They form guide means. In this case, each of the front and rear portions of the adaptation means of the boot has a shape that allows it to cooperate, respectively with all these types of front or rear edges and all types of retaining device (with a single thread). , or to two sons, or of another type). Examples of adaptation means are represented in figure 15B , where it is seen that each of them comprises, in its lower portion, intended to be in contact with the retaining device, one or more cavities 70 ', 71', 72 ', 73' whose shape corresponds at the front or rear edges, and which allow to receive, at least in part, these front or rear edges.

Another example is illustrated in figure 16A , where the front interface area of the retainer is provided with one or more studs 74, 75, oriented perpendicular to the surface of a ski. Again, possibly, the position of these pads can be adjustable along the ski extension direction and / or in a direction perpendicular to the latter. One or more pads 76, 77 may be in the rear interface area of the ski, intended to receive the heel of the shoe or the base. They form longitudinal guiding means. This or these pads have for example a shape for example substantially cylindrical or frustoconical, but other geometric shapes are possible. Each of the front or rear portions of the adaptation means has a shape that allows it to cooperate respectively with this or these studs front or rear. Examples of these means of adaptation are represented in Figures 16B and 16C , where it is seen that each of them comprises, in its lower portion, intended to be in contact with the retaining device, one or more openings 74 ', 75', 76 ', 77' whose shape corresponds to the front or rear studs, and which allow to receive, at least in part, these studs front or rear.

• dans la zone d'interface avant, destinée à recevoir la partie avant de la chaussure, au moins une arête transversale 70, 71, orientée perpendiculairement à la direction d'extension du ski ;
• et, dans la zone d'interface arrière destinée à recevoir la partie arrière de la chaussure, un ou des plots 76, 77 orientés sensiblement perpendiculairement à la surface du ski.

The examples described above can be combined. For example, the ski may include:

• in the front interface area, intended to receive the front part of the boot, at least one transverse edge 70, 71, oriented perpendicularly to the direction of extension of the ski;
• and, in the rear interface zone intended to receive the rear part of the boot, one or more pads 76, 77 oriented substantially perpendicularly to the surface of the ski.

• dans la zone d'interface avant, destinée à recevoir la partie avant de la chaussure, une ou plusieurs arêtes longitudinales, comme représenté en figure 1;
• et, dans la zone d'interface arrière destinée à recevoir la partie arrière de la chaussure, au moins une arête transversale, orientée perpendiculairement à la direction d'extension du ski.

Or the ski can include:

• in the front interface area, intended to receive the front part of the shoe, one or more longitudinal edges, as shown in FIG. figure 1 ;
• and, in the rear interface area for receiving the rear portion of the shoe, at least one transverse edge, oriented perpendicular to the extension direction of the ski.

• une zone d'interface avant, destinée à recevoir la partie avant de la chaussure, cette zone d'interface avant étant d'un premier type, comportant un ou des éléments, en élévation par rapport à la surface plane du ski, ayant une ou des premières formes géométriques;
• et une zone d'interface arrière, destinée à recevoir la partie arrière de la chaussure, cette zone d'interface arrière étant d'un deuxième type, comportant un ou des éléments, en élévation par rapport à la surface plane du ski, ayant une ou des deuxièmes formes géométriques, dont au moins une est différente de la ou des premières formes géométriques.

In other words, the ski has:

• a front interface zone intended to receive the front part of the boot, this front interface zone being of a first type, comprising one or more elements, in elevation relative to the flat surface of the ski, having one or first geometric shapes;
• and a rear interface zone, intended to receive the rear part of the boot, this rear interface zone being of a second type, comprising one or more elements, in elevation with respect to the flat surface of the ski, having a or second geometric shapes, at least one of which is different from the first geometric form or shapes.

Another example is illustrated in Figure 17A , where the ski has, in the zone for receiving a shoe or a base, no edge or no stud. But in this case, the shoe is wide enough to include means of adaptation, in the form of a slot or groove 79, 79 'extending in the direction of extension of the shoe, as illustrated in FIG. Figures 17B to 17D . This groove 79, 79 'has a width and / or a transverse profile at least equal to the width of the ski.

When the shoe is positioned on the ski, it overflows on each side of it. As a variant, front and rear adaptation means 140 comprise, in the lower portion, intended to be in contact with the ski, an opening or groove 79, 79 'which can receive, at least in part, the corresponding portion of the ski. Each groove 79, 79 'has a width and / or a transverse profile at least equal to the width of the machine. Fastening means will make it possible to maintain against the base the means of adaptation of the Figures 17B-17D . Thus, the orifices 47 ₁ - 47 _{4, and} 470 ₁ - 470 ₄ will introduce for example screws, for holding against the base.

In all the cases described above, the front and rear elements to be fixed on the outer surface of the base have substantially identical heights to each other.

• l'élément avant étant d'une première hauteur h1, mesurée entre les deux surfaces principales de cet élément (la surface tournée vers l'embase et celle tournée vers le ski ou la raquette) ;
• l'élément arrière étant d'une deuxième hauteur h2, mesurée de la même manière.

But, as illustrated in Figures 18A and 18B it is also possible to predict different heights of these elements:

• the front element being of a first height h1, measured between the two main surfaces of this element (the surface facing the base and that facing the ski or the racket);
• the rear element being of a second height h2, measured in the same way.

In most of the cases described above, the front and rear elements to be fixed on the outer surface of the base have flat surfaces substantially parallel to each other. But it is also possible to provide surfaces that are not parallel to each other, in at least one direction, in order to adapt the positioning to a machine, for example a ski or a racket, to a particular morphology of a user (for example to compensate for knee orientations) and / or to allow amplified or increased acceleration effects.

Thus, we see figure 19A an example of a front element whose outer surface is inclined by an angle α1, with respect to the inner surface (intended to come into contact with the base), on the lateral side (facing outwards of the user in use) to the medial side (turned inward of the user's legs during use).

It has been shown, in figure 19B , a rear element also having such a lateral inclination α1.

In figure 19C is shown an example of a front member whose outer surface is inclined relative to the inner surface (intended to come into contact with the base), from the rear to the front. Such an element allows the user to tilt forward. However, it can be provided a reverse arrangement with an element that allows a tilting of the user to the rear.

• par rapport à la surface intérieure (destinée à venir en contact avec l'embase), du côté latéral (tourné vers l'extérieur de l'utilisateur lors de l'utilisation) vers le côté médial (tourné vers l'intérieur des jambes de l'utilisateur lors de l'utilisation) ;
• et, par rapport à la surface intérieure (destinée à venir en contact avec l'embase), de l'arrière vers l'avant ou inversement. Un tel élément permet une inclinaison de l'utilisateur vers l'avant ou vers l'arrière.

A front or rear element may have an outer surface that combines the two types of inclinations described above, and is inclined:

• relative to the inner surface (intended to come into contact with the base), on the lateral side (turned towards the outside of the user during use) towards the medial side (turned towards the inside of the legs of the the user during use);
• and, with respect to the inner surface (intended to come into contact with the base), from back to front or vice versa. Such an element allows an inclination of the user forwards or backwards.

It is understood that a user can choose the type of inclination that suits him best, for physiological reasons and / or athletic efficiency, and adjust the element to the base in the manner already explained above.

In all the cases described above, the adaptation means comprise a front element and a rear element to be fixed on the outer surface of the base.

In some cases, the adaptation means may comprise a part to be fixed at the front of the base (we will then speak of "front" part), but it is not necessary to fix a rear part, or heel , behind the base: this is the case when the fastening element of the front part is sufficiently rigid so that the latter can allow to ensure, on its own, a guiding function of the machine.

This embodiment is represented in Figures 20A - 20B . In these figures, the numerical references denote elements identical or similar to those already described above in connection with the Figures 3A - 3B . We do not just fix elements on the back of the base. The assembly cooperates with, for example, a ski, the figure 20C is an illustration, having a retainer 3 and a bearing surface 700 for the rear part of the base, or the heel.

In all the cases described above, the attachment means comprise one or two son. But, as already stated, other types of attachment means can be implemented, for example those of Figures 21A and 21B . In these figures, an attachment device 60 comprises a fastening element 61 secured by any means, for example to the shoe, and a locking mechanism 62 also secured by any means for example to the machine. The hooking element 61 comprises a first finger 63 intended to take place in a notch 64 of the mechanism 62. The hooking element 61 also comprises a second finger 65 designed to cooperate with a hook 66 of the mechanism 62, the hook being movable against the action of a not shown elastic means. A support of the boot towards the ski causes locking, while an action on an unlocking button 67, against the action of the elastic means, releases the shoe.

In all cases, the positioning, respectively of the front part or of the rear part of the adaptation means has a longitudinal extension which can go up to 30% or 35% or 40% of the length of the base, measured respectively from the front or rear end of the base.

The teaching described above for the case of a ski can be transposed to the case of snowshoes.

In all cases the invention is made from materials and according to processing techniques known to those skilled in the art. The front and rear portions of the adaptation means are made with a number (2 to 4) of reduced molds compared to the number (8 to 15) of molds used to achieve all sizes of shoe soles currently known. From the economic point of view, the advantage is considerable, since, to achieve each mold, it takes an investment of between 10 and 40 K €.

Naturally, the invention is not limited to the embodiments described above, and includes all technical equivalents that fall within the scope of the claims that follow.

In particular, it is provided, in certain cases, that the first part 25, to be fixed in a front zone of the base of the boot, and the second part 140, are not integral with each other, or dissociated one of the other, when none of them are attached to the base of the shoe.

It is alternatively provided, in other cases, that the first part 25, to be fixed in a front zone of the base of the shoe, and the second rear portion 140, are integral with each other, when none of them is attached to the shoe.

According to these alternatives, the first portion 25 and the second portion 140 are connected by a flexible blade.

Claims (12)

1. Boot (1) intended for use in a physical activity using a sliding or rolling sports device (2), in which the heel of the boot is free during the movement of the foot, this boot comprising:

   - a base (12, 120, 200),

   - adapting means (25, 140), comprising

   ∘ an element (25) for binding to the sports device (2), that is to be attached in a front region of the base of the boot, with respect to a direction of extent of the foot, and

   ∘ a heel (140) that is to be attached in a rear region of the base of the boot, with respect to said direction of extent of the foot,

   it being possible to attach each one removably with respect to the base,
   characterized

   - in that said binding element (25) and said heel (140) are connected by a planar flexible leaf (12, 120, 200), the flexible leaf being an integral part of the base (12, 200) or a part (120) used in conjunction with the base (12, 200), wherein the base can comprise walls (201, 203) and possibly a part forming a reinforcement, in order to hold the rear portion of the upper of a boot,

   - in that the boot further comprises removable means (222, 223, 225, 227) for varying the flexibility of the flexible leaf, these removable means comprising one or more inserts or pins (222, 223) and/or one or more plates or leaves (225, 227) that are to be inserted into said flexible leaf or against the latter, and

   - in that the boot comprises means (481-484, 4801-4804, 92, 94, 96, 97, 920, 940, 960, 970) for attaching, by means of screws or using slides or by clipping, the adapting means (25, 140) with respect to the flexible leaf, in one position or in multiple positions that may be discrete or continuous.
2. Boot according to Claim 1, said binding element (25) and said heel (140) being not secured to one another, or dissociated from one another, when these elements (25, 140) are not attached to the flexible leaf.
3. Boot according to either of the preceding claims, the first type of contact interface of the sports device being by means of a single longitudinal ridge, said binding element (25) and said heel (140) each comprising a longitudinal groove (315) designed to receive at least part of said single longitudinal ridge.
4. Boot according to either of Claims 1 and 2, the second type of contact interface of the sports device having at least two longitudinal ridges, said binding element (25) and said heel (140) each comprising at least two longitudinal grooves (131, 132), each groove being designed to receive at least part of one of the longitudinal ridges.
5. Boot according to either of Claims 1 and 2, a contact interface of the sports device comprising at least one transverse ridge (70-73) and/or at least one stud (74-77), said binding element (25) and said heel (140) comprising at least one transverse groove (70', 71', 72', 73') or at least one orifice (74', 75', 76', 77'), each groove or each orifice being designed to receive a transverse ridge (70-73) or a stud (74-77).
6. Boot according to either of Claims 1 and 2, a contact interface of the sports device comprising a surface of the device itself, said binding element (25) and said heel (140) comprising at least one longitudinal groove (79, 79').
7. Boot according to one of the preceding claims, said binding element (25) and said heel (140) being of different heights (h1, h2).
8. Boot according to one of the preceding claims, the base (12, 120, 200) being flexible in a direction of extent of the foot.
9. Boot according to one of the preceding claims, said binding element (25) and/or said heel (140) having a surface that is designed to come into contact with the base (12, 120, 200), enclosing a non-zero angle with the opposing surface, and is designed to come into contact with or to be oriented towards the device.
10. Boot according to one of the preceding claims, being of the shell type consisting of one, two or three parts.
11. Boot according to the preceding claim, characterized in that the relative positions of the shell parts are adjustable.
12. Boot according to one of the preceding claims, the contact interface of the device comprising a device for retaining or binding the boot, that is designed to engage with said binding element (25).

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