EP3047747A1 - Shoe with improved structure - Google Patents

Abstract

Shoe (1) comprising an outer sole (2) and a shaft (3), the shoe (1) extending in length from a rear end (4) to a front end (5), in width between one side lateral (6) and a medial side (7), and in height from the outer sole (2) to an upper end (12), the shoe (1) comprising a first casing (21), the shoe further comprising a reinforcement structure (19) disposed opposite the first envelope (21). The reinforcing structure (19) has holes (33, 34, 35, 36, 37, 38) on at least part of its surface.

Description

The invention relates to a walking or sports shoe, which can be used in areas such as running, on a horizontal terrain, hilly or mountainous, the wheeled board, a ball sport, cross-country skiing or telemark, snowboarding, snowshoeing, or whatever.

For the intended uses, each shoe must have particular flexibility and good damping capacity. Flexibility should be understood as an ability to accompany certain deformities of a user's foot. This is for example to allow a smooth running of the foot, or inclinations of the lower leg relative to the foot, during walking or running. The depreciation, meanwhile, aims to reduce or prevent fatigue or trauma that may result from support or impacts on the ground, or various solicitations.

Thus, it is known to manufacture a shoe that includes an outer sole and a rod. The shoe generally comprises at least one flexible envelope provided for covering the foot, directly or indirectly. The envelope is part of the stem. The envelope is associated with a base, such as a mounting flange, to form a footwear element. The mounting sole is part of an internal sole. The shell of the shoe extends in particular at a lateral side and a medial side, and sometimes also at a substantial portion of the mounting flange. This structure is classic.

The envelope is for example glued to the mounting flange by a layer of glue. The sole, relatively rigid to withstand the mounting process, is also called first mount. The gluing is done by pulling the envelope to press it on the sole, knowing that a shape is inserted into the footwear element. This technique is called the traditional form fitting. This allows to exert sufficient pressure during the heating of the glue, to obtain the footwear element.

Alternatively, the footwear element is for example made by joining the envelope to the mounting flange by means of a seam. This is called Strobel editing. The sole is a flexible piece that can be sewn, called a Strobel sole.

Whatever the method used, for the manufacture of the shoe, the footwear element is secured to the outer sole, for example by means of a layer of glue. In the end, the shoe has a certain flexibility and a certain damping capacity.

The shoe must also fulfill various functions, sometimes antinomic, such as protecting the foot from shocks or impacts that may occur during use, ensure maintenance and / or sufficient tightening of the foot while providing satisfactory comfort, or other. For this reason, it is usual to provide a shoe with one or more reinforcing structures.

For example, in order to protect the toes from possible shocks against obstacles, the front end of the shoe includes a protective tip. This is often made of a layer of synthetic material, arranged opposite the envelope at the level of the front end of the shoe. This layer strengthens the envelope, reducing its deformation abilities where it extends.

Another example of a reinforcing structure is that of a part which is the connection between the base of the footwear element and loops, arranged towards an upper end of the envelope. In this case the reinforcing structure participates in tightening the upper of the boot, which in particular allows a minimum of foot support.

In all cases, the reinforcement structure has a specific function that aims to optimize the use of the shoe.

It can therefore be said that, in general, a flexible shoe provided with at least one reinforcing structure, according to the prior art, is satisfactory in the broad sense. However, there are still some problems, which sometimes occur during walking, or sometimes during intense sports use.

A first problem is the following: the known shoe hinders, at least in part, the unwinding of the foot due to the presence of one or more reinforcing structures, especially for the race. More specifically, the discomfort occurs at the boundary between an area provided with a reinforcing structure of an area not provided with reinforcement structure. On both sides of this limit, the flexibility of the stem varies abruptly. It follows that the course of the foot is not regular enough, not progressive enough, because disturbed at the limit. It also results that the transmission of sensory information, supports, impacts and other solicitations is a little irregular, or a little imprecise. In other words, a shoe according to the prior art lacks homogeneity in its behavior.

Another problem is that of comfort. It is not homogeneous, that is to say not at the same level in different parts of the shoe. Indeed, where a reinforcing structure extends, the comfort can be altered, especially during difficult conditions of use such as running in the mountains. The deterioration of comfort is correlated with the difference in flexibility of the rod, on either side of the boundary between an area provided with a reinforcing structure and an area not provided with reinforcement structure. In particular, it can be observed that the boundary between these zones can sometimes form a relatively non-deformable fold, which fold can be a source of trauma for the user.

Another problem is that related to inertia. Each reinforcement structure weighs the boot which, as a result, creates additional fatigue for the user.

With respect to this, the object of the invention is to provide an improved shoe.

In particular, the invention seeks to facilitate the unwinding of the foot in a shoe provided with at least one reinforcing structure, that is to say to make the progress of the foot more regular, more progressive. The invention also wants to make more regular and / or more precise transmissions of sensory information, supports, impacts and other solicitations. In other words, the invention wants to make a shoe more homogeneous in its behavior.

The invention also seeks to improve the comfort of a shoe. In fact, it is a question of making the comfort more homogeneous, that is to say almost at the same level, or totally at the same level, at different places of the shoe. It's about wrapping the foot in a more progressive way.

The invention also wants as much as possible to lighten the structure of the shoe, to reduce the fatigue of the user.

To do this, the invention provides a shoe comprising an outer sole and a rod, the shoe extending in length from a rear end to a front end, in width between a lateral side and a medial side, and in height from the outer sole to an upper end, the shoe comprising a first envelope, the shoe further comprising a reinforcing structure disposed opposite the first envelope.

The shoe according to the invention is characterized in that the reinforcing structure has holes on at least part of its surface. It will be seen later that this means in particular that at least one cavity and / or at least one opening are formed in the reinforcement. Each hole, each cavity, each opening, may have any contour, such as that of a slot, or other.

For one of the given dimensions of the reinforcement, that is to say in particular for a given perimeter or for a given thickness thereof, the fact that it has holes makes it lighter; holes, such as cavities or openings of various shapes, reduce the amount of material required for its constitution.

By its structure the reinforcement is also more flexible, more deformable, for example in the event of impact on an obstacle, while still maintaining some resistance to crash due to impact. As a result, the first envelope can also flex where it extends opposite the reinforcing structure. In other words, the fact of having formed holes in the reinforcing structure increased the surface of the envelope able to deform in bending. It can also be said that at the level of a reinforcing structure, the upper of the boot is able to undergo a reversible deformation by depressing, even if this deformation is less than in zones devoid of reinforcing structure. The holes facilitate the possibilities of deformation of the reinforcement, which brings more flexibility. It is also observed that the envelope deforms more evenly, at a boundary between an area facing the reinforcing structure and a zone away from the reinforcing structure.

Among the advantages that result, we can mention a better course of the foot, that is to say a more regular, more progressive. The difference in flexural strength, between a zone of the rod provided with a reinforcing structure and an area which is not, is indeed reduced, compared to what could be observed on a shoe according to the invention. prior art.

As a corollary with the unfolding of the foot, for a shoe according to the invention, sensory information transmissions, supports, impacts and other solicitations are also more regular and / or more precise. It can be said that the invention makes the shoe more precise in its behavior.

Another advantage provided by the invention is that of improved comfort. This one is more homogeneous, that is to say almost at the same level, even at the same level, in different places of the shoe. In other words the comfort varies little, if any at all, from a zone devoid of reinforcement structure to a zone that is provided with it. It can be said, for example, that the boundary between two zones of the envelope, one facing the reinforcing structure and the other not, remains flexible enough to preserve the user's foot. This means that this limit is not a source of trauma.

The invention also reduces fatigue of the user, because the holes, cavities or the openings of the reinforcing structures lighten the shoe.

It can be said more generally that the invention provides an improved shoe, compared to what exists as prior art.

• la figure 1 est une vue en perspective avant d'une chaussure, selon une première forme de réalisation de l'invention,
• la figure 2 est une vue éclatée en perspective avant de la chaussure selon la figure 1,
• la figure 3 est une vue schématique par-dessus d'un sous-ensemble, lequel comprend une enveloppe, une structure de renfort et une garniture,
• la figure 4 est une coupe transversale, dans une représentation éclatée, selon IV-IV de la figure 1,
• la figure 5 est similaire à la figure 4, dans un cas où le premier élément chaussant est solidarisé au semelage,
• la figure 6 est un agrandissement partiel de la chaussure selon la figure 1,
• la figure 7 est similaire à la figure 6, pour une deuxième forme de réalisation de l'invention,
• la figure 8 est une vue en perspective avant d'une chaussure, selon une troisième forme de réalisation de l'invention,
• la figure 9 est une vue en perspective arrière de la chaussure selon la figure 8,
• la figure 10 est une vue éclatée en perspective avant de la chaussure selon la figure 8.

Other features and advantages of the invention will be better understood with the aid of the following description, with reference to the appended figures, which illustrate, according to non-limiting embodiments, how the invention can be realized, and in which :

• the figure 1 is a front perspective view of a shoe, according to a first embodiment of the invention,
• the figure 2 is an exploded view in front perspective of the shoe according to the figure 1 ,
• the figure 3 is a schematic view over a subassembly, which comprises an envelope, a reinforcing structure and a liner,
• the figure 4 is a cross section, in an exploded representation, according to IV-IV of the figure 1 ,
• the figure 5 is similar to the figure 4 , in a case where the first footwear element is secured to the sole,
• the figure 6 is a partial enlargement of the shoe according to the figure 1 ,
• the figure 7 is similar to the figure 6 for a second embodiment of the invention,
• the figure 8 is a front perspective view of a shoe, according to a third embodiment of the invention,
• the figure 9 is a rear perspective view of the shoe according to the figure 8 ,
• the figure 10 is an exploded view in front perspective of the shoe according to the figure 8 .

The first embodiment that will be described after relates for example to a shoe for walking or running, on a horizontal terrain, hilly or mountainous. However, the invention applies to other fields such as those mentioned before.

The first form is described below using the Figures 1 to 6 .

As shown in figure 1 , a walking shoe or race 1 is provided to accommodate the foot of the user. In known manner, the shoe 1 comprises an outer sole 2 and a rod 3 disposed on the sole. The shoe extends in length, in a longitudinal direction L, between a rear end or heel 4 and a front end or tip 5, and in width, in a transverse direction W, between a lateral side 6 and a medial side 7.

As shown the rod 3 comprises exclusively a lower portion 10, provided to surround the foot. It can alternatively be provided a case for which the shoe comprises also a high portion, provided for it to surround the ankle and possibly the lower leg.

According to the first embodiment described, the shoe 1 extends in height from the outer sole 2 to an upper end 12, that is to say up to the free end of the lower portion 10 or the stem 3.

The shoe 1 is structured to allow a smooth running of the foot during walking, transmissions of sensory information, and impulses for support or receptions. This is why the outer sole 2 and the rod 3 are relatively flexible.

The shoe 1 further comprises a first clamping device 15, provided for clamping the rod 3 in a reversible manner. This device is not described in detail here because it is well known to those skilled in the art. However, it is specified that, for example, the clamping device 15 comprises loops 16 disposed on the rod, and a link 17 which travels through the passers-by. Alternatively, still in the spirit of the invention, it can be provided not to equip the shoe 1 clamping device. It is specified that one can provide, optionally, a rod 3 continuous from the lateral side 6 to the medial side 7, or, alternatively, a discontinuous stem from the lateral side 6 to the medial side 7.

As can be seen in particular on the figure 2 , the shoe 1 comprises a first footwear element 18, a reinforcing structure 19, and a lining 20. The constitution and implementation of these parts in the shoe will be addressed in stages over the description.

Consider first footwear element 18. This comprises a first envelope 21 and a first base 22. It will be seen later that, without limitation, the first base 22 is here a first mounting plate, generally called simply more fitting first. The first envelope 21, as for it, is intended to cover the foot of the user. This envelope 21 extends in length from a rear end 24 to a front end 25, in width between a lateral side 26 and a medial side 27, and in height from the base 22 to an upper end 32.

The reinforcement structure 19 now, which will be detailed later, is arranged facing the first envelope 21. More precisely here, without limitation, the reinforcing structure 19 is secured to the first envelope 21 at the end. before 25 thereof, and so as to partially cover at least this end. It can be said more simply that the reinforcing structure 19 covers the first envelope 21, even if it does not extend over the entire surface of the envelope. The reinforcing structure 19 is thus located outside the envelope 21. It is nevertheless possible to provide an alternative construction for which the reinforcement structure is located inside the first envelope 21.

According to the invention, the reinforcing structure 19 has holes 33, 34, 35, 36, 37, 38 on at least part of its surface. For one of the given dimensions of the reinforcement, that is to say in particular for a given perimeter or for a given thickness thereof, the fact that it has holes makes it lighter; holes, such as cavities or openings of various shapes, reduce the amount of material required for its constitution.

By its structure the reinforcement is also more flexible, more deformable, for example in the event of impact on an obstacle, while still maintaining some resistance to crash due to impact. As a result, the first envelope can also flex where it extends opposite the reinforcing structure. In other words, the fact of having formed holes in the reinforcing structure increased the surface of the envelope able to deform in bending. It can also be said that at the level of a reinforcing structure, the upper of the boot is able to undergo a reversible deformation by flexion, the deformation being able to be a depression, even if this deformation is less than in zones devoid of structure. reinforcement. It is also observed that the envelope deforms more evenly, at a boundary between an area facing the reinforcing structure and a zone away from the reinforcing structure.

This allows a better course of the foot, that is to say a more regular, more progressive. The difference in flexural strength, between a zone of the rod provided with a reinforcing structure and an area which is not, is indeed reduced, compared to what could be observed on a shoe according to the invention. prior art.

As a corollary with the unfolding of the foot, for a shoe according to the invention, sensory information transmissions, supports, impacts and other solicitations are also more regular and / or more precise. It can be said that the invention makes the shoe more precise in its behavior.

The invention also offers improved comfort. It is more homogeneous, that is to say, almost at the same level, or even the same level, in different parts of the shoe. In other words the comfort varies little, if any at all, from a zone devoid of reinforcement structure to a zone that is provided with it. It can be said, for example, that the boundary between two zones of the envelope, one facing the reinforcing structure and the other not, remains flexible enough to preserve the user's foot. This means that this limit is not a source of trauma.

The invention also reduces fatigue of the user, because the holes, cavities or the openings of the reinforcing structures lighten the shoe.

According to the first embodiment still, in a nonlimiting manner, the reinforcing structure 19 comprises a front end piece 39 in the form of an arc, the front end piece 39 comprising a lateral branch 46 and a medial branch 47 connected to each other. another by a front bridge 48, the front end 39 extending, in the direction of the height, between a lower edge 49 and an upper edge 50, the front end 39 extending, in the direction of the length between the front bridge 48 and the lateral end 51 of the lateral branch 46 on the one hand, and between the front bridge 48 and the medial end 52 of the medial branch 47 on the other hand. Here the lateral 51 and medial ends 52 are free, in the sense that they constitute the rear limits of the tip 39. It will be seen later that this is not always the case. But in this configuration, that is to say the arc-shaped, the tip 39 reinforces the front end 25 of the first envelope 21. It can also be said that the tip 39 reinforces the front end 5 The reinforcement effect is weighted by the presence of the holes 33, 34, 35, 36, 37, 38, which confers some flexibility to the casing 21, and the rod 3 accordingly. This advantageously results in a better perception, by the user, of contact with the ground or an obstacle, sensory information, or other, which occur at the toes. The greater flexibility of the shoe at the tip 39 also allows a more even running of the forefoot. This increases the stability of the supports on the ground, and reduces the fatigue of the user.

In a non-limiting way, as can be observed in particular on figures 1 , 2 and 3 the holes 33, 34, 35, 36, 37, 38 of the reinforcing structure 19 are, at least in part, slots. In fact, for the first embodiment of the invention, the holes 33, 34, 35, 36, 37, 38 of the nozzle 39 are, at least in part, slots. These last cross the reinforcement structure. But it will be seen later that the holes may not pass through the reinforcing structure, and that they therefore constitute thinning of the reinforcing structure. The slits have edges that move toward or away from each other as the shoe deforms in relation to the foot during use. This is to say that the width of each slot can vary during the use of the shoe. It follows that the reinforcing structure 19, namely the tip 39, has a variable geometry. The volume delimited by the tip can be reduced, which corresponds to a tightening of the slots, to then return to its original size, or even increase, which corresponds to an enlargement of the slots. These variations in volume of the tip 39 give progressivity to the deformations of the first envelope 21, for greater comfort of the foot.

At least in part, the slots 33, 34, 35, 36, 37, 38 open at the upper edge 50 of the front end 39. The slots thus open at the edge of the tip 39 closest to the upper end 12 of the shoe 1, that is to say also at the edge of the tip farthest from the sole 2. Consequently, the part of the tip most adapted to deform is that the higher, the closest to the upper end 12. It follows that the flexibility of the rod 1, or the flexibility of the casing 21, is reduced from the upper end 12 to the sole assembly 2, that is, ie from the upper end 12 to the base 22. The reduction of flexibility is progressive, which optimizes the perception of sensory information by the user.

By way of example, at least in part, the slots 33, 34, 35, 36, 37, 38 are curved. This limits or even completely prevents the formation of folds at the first envelope 21 when the rod flexes. Therefore the envelope 21 has a more even surface during the unwinding of the foot, which greatly reduces the risk of trauma. Indeed, a fold can be a nuisance because it stiffens the envelope.

According to the first embodiment still, the lateral branch 46 of the front end 39 has slots 33, 34, 35, and the medial branch 47 of the front end 39 has slots 36, 37, 38, here the slots are divided equally in the lateral side 6 and the medial side 7 of the shoe. The lateral side 6 has three slots 33, 34, 35, and the medial side 7 has three slots 36, 37, 38. This allows the sides 6, 7 to deform in a similar manner, for a better transversal balance in the transmission of efforts, in the perceptions of sensory information, or other. The precision of the supports is only better. Note that the number of slots is six. But this number is merely indicative. It can be provided a case for which the tip 39 comprises less than six slots, or a case for which the tip 39 comprises more than six slots.

As can be seen on the figures 1 and 2 , the boot 1 comprises a lining 20, mentioned above, which partly covers at least the reinforcing structure 19, and which partly covers at least the first envelope 21. It follows as a corollary that a subdivision of the reinforcement structure , or that the entire reinforcement structure is sandwiched between the first casing 21 and the lining 20. This has the advantage of further improving the progressive flexural variation of the rod 3 from the upper end 12 to the sole assembly 2. By way of non-limiting example, the lining 20 consists of a film of a synthetic material. It may be a polyurethane film, polyamide or any equivalent material. The thickness of the film is less than 0.5 millimeters, knowing that films whose thickness is less than 0.1 millimeters have given very good results.

With regard to its extent the lining 20 takes place here, without limitation, a little everywhere on the shoe 1. The lining extends in length from a rear end 54 to a front end 55, in width between a lateral side 56 and a medial side 57, and in height from a base 58 to an upper end 59. The rear end 54, the front end 55, the lateral side 56, the medial side 57, the base 58 and the upper end 59 of the lining are respectively at the rear end 4, the front end 5, the lateral side 6, the medial side 7, the sole 2 and the upper end 12 of the shoe 1 The lining may fulfill protective functions of the first envelope 21, decorative functions, or other, as will be specified a little further.

Finally, as regards its structure, the rod 3 comprises the first envelope 21, a significant part of the reinforcing structure 19, and a significant part of the lining 20. The assembly between them of these elements is presented schematic on the figure 3 . In a nonlimiting manner, the first envelope 21, the tip or reinforcing structure 19 and the lining 20 are initially flat parts, that is to say in two dimensions. The pieces are superimposed and then joined together by any appropriate technique, such as gluing, sewing, or other. The pieces once joined constitute a subset that allows to go further in the manufacture of the shoe 1, as can be seen on the Figures 4 and 5 .

First on the figure 4 it is observed that the subassembly evoked just before has been shaped in three dimensions, and maintained in its shape by the first mounting 22, for example here by means of a seam 60. This known technique is not developed more right here. It should nevertheless be noted that the boot 1 comprises, without this being an obligation, a sockliner 61. It follows that the boot 1 comprises an internal sole 62, which comprises the first mounting sole or base 22 as well as, if necessary, the insole 61. This improves the hygienic qualities of the shoe.

As also shows figure 4 , without limitation, the outer soleing 2 comprises several layers: for example a wear layer 63, provided to contact the ground, and a damping layer 64 interposed between the wear layer 63 and the first footwear 18. In known manner, the wear layer 63 comprises rubber, or any material that resists abrasion. The damping layer 64, in turn, comprises an absorbent material, such as an ethyl vinyl acetate foam (EVA) or any equivalent. Of course, the outer soleing 2 may comprise a single layer or, on the contrary, three or more layers, as well as layer portions.

According to the first embodiment still, the outer sole assembly 2 has a lip 65, at the junction with the first footwear element 18, to increase the contact surface with the latter. Here the lip is derived from the damping layer 64. The lip 65 is continuous, and follows the periphery of the outer sole 2. Of course, it could alternatively be provided a segmented lip, or discontinuous. However, a continuous lip increases the useful surface to join the sole 2 to the first footwear 18 by bonding. This fastening is shown on the drawing. figure 5 . It can clearly be seen that the lip 65 extends partly facing the rod 3, that is to say also partly facing the first casing 21, the lining 20, or even the reinforcing structure 19 .

The finished shoe 1 is shown in enlarged partial view on the figure 6 . It is especially here to better perceive the role of the liner 20. This covers, as we have already seen, in part the tip 19 and partly the first envelope 21. Without limitation, the The constituent film of the liner 20 is transparent, or translucent. This allows for example to visually control the quality of the assembly of the reinforcing structure 19 with the first envelope 21, especially with respect to the behavior in time. This also gives a particular aesthetic effect to the shoe 1, which effect can be interesting.

The other embodiments of the invention will be presented hereinafter with the help of Figures 7 to 10 . For the sake of convenience, it is mainly the differences from the first form that will be highlighted.

For the second form, according to figure 7 , there is a shoe 1, including an outer sole 2 and a rod 3, which comprises a first casing 21, a first reinforcing structure 19, and a lining 20. Again the reinforcing structure 19 is a shaped tip 39 arc with a lateral branch 46, a medial branch 47 not visible in the figure, and a front bridge 48. The tip 39 extends in the direction of the height between a lower edge 49 and an upper edge 50.

What is specific to the second embodiment of the invention is the distribution of the holes formed in the reinforcing structure. In a nonlimiting manner, at least a quantity of the holes are slots 71, 72, 73, 74 arranged away from the contour of the tip 39. This means that these slots do not open at the contour of the tip. , especially being separated from the lower edge 49 and the upper edge 50. The slots here have different dimensions, including different lengths. This allows to get the desired flexibility in each area of the mouthpiece. If the number of holes, that is to say slots, is for example here four, other embodiments may provide a lower number of holes or, conversely, greater than four.

For the third embodiment now, according to the Figures 8 to 10 , there is again a shoe 1, including an outer sole 2 and a rod 3, which comprises a first casing 21, a first reinforcing structure 19, and a lining 20.

What is specific to the third embodiment relates in particular to the reinforcing structure 19. In general, it appears that the reinforcing structure 19 comprises a side wall 86 and a medial wall 87. Without limitation, each wall covers the first envelope, in the sense that it is disposed outside the latter. Here again an alternative construction is that for which each wall is disposed inside the first envelope, but the external arrangement brings more comfort.

Like what has been seen for the front end 39, the side wall 86 has holes 88, and the medial wall has holes 89. It is again a matter of adjusting the flexibility of the walls, and therefore the flexibility of the lateral 6 and medial sides 7 of the upper 3 of the shoe. The holes have various dimensions, and various shapes, such as triangles, or other.

In the spirit of what has been mentioned above, loops 16 are disposed at the side wall 86 of the reinforcing structure, and loops 16 are disposed at the medial wall 87 of the reinforcing structure. This makes the wrapping of the foot more homogeneous and more comfortable, because the tightening is more progressive.

It is noted in addition that the reinforcing structure 19 also comprises a rear axle 90, which connects the side wall 86 to the medial wall 87. Thus the rear axle 90 acts as a buttress, for a better maintenance of the heel of the foot.

Without limitation, the front end 39, the side wall 86 and the medial wall 87 form a single piece. In a broader manner, the front end 39, the side wall 86, the rear bridge 90 and the medial wall 87 form a single piece. This facilitates the manufacture of the reinforcing structure 19. In this spirit, for example, the reinforcing structure is made of a synthetic material, such as polyurethane, polyamide, or any equivalent material.

In all cases the invention is made from materials and according to processing techniques known to those skilled in the art.

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, different arrangements can be provided for the reinforcing structure, or for the lining.

For example, in the embodiments discussed in the description, the holes completely traverse the reinforcing structure. This means that the holes have a depth equal to the thickness of the reinforcement structure. In a different way, embodiments may be provided for which one or more holes, or even all the holes, have a depth less than the thickness of the reinforcement structure. The holes dig the reinforcing structure without crossing it. In this case, they may be visible and lead to the side of the lining, or be invisible and lead to the side of the first envelope.

This corresponds to the spirit of the invention, because it is to weaken the reinforcement structure so as to allow some bending of the rod at the structure, despite the presence of this structure. In this sense, the invention goes against a prejudice,

It is also possible to provide holes in the reinforcement structure, and their total or partial filling by a softer material than that constituting the reinforcement structure.

In all cases, the reinforcement structure has one or more areas for which the mechanical strength is reduced, compared to other areas of the structure.

Claims (15)

Shoe (1) comprising an outer sole (2) and a shaft (3), the shoe (1) extending in length from a rear end (4) to a front end (5), in width between one side lateral (6) and a medial side (7), and in height from the outer sole (2) to an upper end (12), the shoe (1) comprising a first casing (21), the shoe further comprising a reinforcing structure (19) disposed opposite the first casing (21), characterized in that the reinforcing structure (19) has holes (33, 34, 35, 36, 37, 38, 71, 72, 73 , 74, 88, 89) on at least part of its surface. Shoe (1) according to claim 1, characterized in that the reinforcing structure (19) comprises an arcuate front end (39), the front end (39) comprising a lateral branch (46) and a medial branch (47) connected to each other by a front bridge (48), the front end (39) extending, in the direction of the height, between a lower edge (49) and an upper edge (50), the front end (39) extending lengthwise between the front bridge (48) and the lateral end (51) of the side arm (46) on the one hand, and between the front bridge (48) and the medial end (52) of the medial branch (47) on the other hand. Shoe (1) according to claim 1 or 2, characterized in that the holes (33,34, 35, 36, 37, 38, 71, 72, 73, 74) of the reinforcing structure (19) are, for at least part of the slots. Shoe (1) according to claim 3, characterized in that , at least in part, the slots (33, 34, 35, 36, 37, 38) open at the upper edge (50) of the front end ( 39). Shoe (1) according to claim 3 or 4, characterized in that , at least in part, the slots (33, 34, 35, 36, 37, 38) are curved, Shoe (1) according to one of claims 3 to 5, characterized in that the lateral branch (46) of the front end (39) has slots (33, 34, 35, 71, 72, 73, 74 ), and in that the medial branch (47) of the front end (39) has slots (36, 37, 38). Shoe (1) according to one of claims 1 to 6, characterized in that the reinforcing structure (19) comprises a side wall (86) and a medial wall (87). Shoe (1) according to claim 7, characterized in that the side wall (86) has holes (88), and in that the medial wall (87) has holes (89). Shoe (1) according to claim 7 or 8, characterized in that loops (16) are arranged at the side wall (86), and in that loops (16) are arranged at the wall medial (87). Shoe (1) according to one of claims 7 to 9, characterized in that the reinforcing structure (19) also comprises a rear bridge (90), which connects the side wall (86) to the medial wall (87) . Shoe (1) according to one of claims 1 to 10, characterized in that the reinforcing structure (19) covers the first casing (21). Shoe (1) according to one of claims 7 to 11, characterized in that the front end (39), the side wall (86) and the medial wall (87) form a single piece. Shoe (1) according to one of claims 1 to 12, characterized in that the reinforcing structure (19) consists of a synthetic material. Shoe (1) according to one of claims 1 to 13, characterized in that it comprises a lining (20) which partly covers at least the reinforcing structure (19), and which partly covers at least the first envelope (21). Shoe (1) according to claim 14, characterized in that the lining (20) consists of a film of a synthetic material.

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