WO2016097606A1

WO2016097606A1 - Outer sole for footwear, comprising damping studs

Info

Publication number: WO2016097606A1
Application number: PCT/FR2015/053549
Authority: WO
Inventors: Cécile LECLAND
Original assignee: Damart-Serviposte
Priority date: 2014-12-16
Filing date: 2015-12-16
Publication date: 2016-06-23
Also published as: EP3232846A1; WO2016097606A9; CN106998854A; EP3232846B1; CN106998854B

Abstract

The invention relates to an outer sole (1) for footwear, having in its heel part (10) several housings (100) which each have an opening (100a) in a lower surface (101) of the sole that is intended to be in contact with the ground, and several damping studs (102) which are positioned in said housings (100) at a rate of at least one damping stud (102) per housing (100) and which, when they are not deformed, protrude partially from said lower surface (101), each damping stud (102) being surrounded around all or part of its periphery by said lower surface (101) and being elastically deformable so as to be able to be compressed at least partially inside the corresponding housing (100). Each damping stud (102) has, at the apex of its protruding part (102a), a surface (102b) for coming into contact with the ground, said surface (102b) being continued around its entire periphery and towards the inside of the stud (102) by a concave curved surface (102c) which is elastically deformable and which allows the damping stud (102) to be squashed with a reduction in the curvature of said concave curved surface (102c).

Description

EXTERIOR SHOE SOLE WITH SHOCK PLOTS

Technical area

The present invention relates to an outer sole of a shoe, and a shoe equipped with this outsole, this sole and this shoe being more particularly adapted to facilitate the walking of a person whose foot has undergone physiological and / or anatomical changes. related to aging.

Prior art

Foot aging studies have shown that natural foot changes occur with age:

- The greasy pile in the heel stiffens with the years.

- Deformities, hallux valgus type, toes in claws or hammers, appear at the level of the forefoot.

- The plantar arch, at the level of the central part of the foot, collapses resulting in pronation of the foot, and an enlargement of the foot that can lead to a flat foot.

The fatty mass in the heel is a biological system that absorbs shocks when the heel comes into contact with the ground. The stiffening of this fatty mass in the heel results from a decrease in collagen, a decrease in the elasticity of the fibers, as well as a decrease in the presence of water and fat. This stiffening causes a decrease in the natural absorption capacity of the foot, which detrimentally results in the impact of the heel with the ground by a shock wave propagating more rapidly along the lower limb.

In addition, an analysis of the walk of the elderly made it possible to highlight that the modifications with the years of the anatomy and the physiology of the foot led to a laying of the foot on the ground (attack heel / ground) more flat .

The deformities at the level of the forefoot, hallux valgus type, toes in claws cause a limitation of the angles of flexion of the toes, increase disturbances of equilibrium, and modify the pattern ("pattern") of walking, which is translated in practice by a more limited and less fluid step and a lower propulsion capacity forward.

It has already been proposed in the US patent application US 2013/0263469 a shoe outsole, still commonly called outsole, suitable for running. This outsole comprises in its heel part and in its front part several housings, each having an opening in a lower surface of the sole intended to be in contact with the ground, and several deformable hollow blocks which are positioned in part in said housing at a rate of at least one stud per housing, and which project from said lower surface. Each deformable stud is surrounded on all or part of its periphery by said lower surface, and is elastically deformable so as to be able to be compressed at least partially within the corresponding housing during contact of the stud with the ground. In this sole, each stud is designed so that it can deform during the impact with the ground by undergoing at least one vertical deformation and one horizontal deformation (see Fig. 2c) which is accompanied by a shearing effect. horizontal of the plot.

The outer sole of shoe described in US patent application US 2013/0263469 can certainly be adapted for running, but on the other hand is not suitable for a foot that has been deformed by aging. More particularly, the deformation of the pads, including a horizontal shearing effect, causes instability for the foot when walking. Consequently, the deformation of the pads makes this shoe sole unsuitable for the walk of a person whose foot has undergone physiological and / or anatomical changes related to aging.

Summary of the invention

A first main objective of the invention is to provide a new shoe outsole having in its heel portion resilient pads projecting and elastically deformable. A more particular object of the invention is to provide a new shoe outsole comprising, in its heel part, resiliently projecting and elastically deformable pads, which facilitate a stable operation, with an effective damping of the shocks during operation. heel strike with the ground, said outsole being more particularly adapted for feet whose greasy pile in the heel has stiffened over the years.

This new shoe outsole is more particularly, but not exclusively, suitable for a foot having undergone physiological and / or anatomical changes related to aging.

Thus, according to a first aspect, the subject of the invention is a boot sole having in its heel portion a plurality of housings, each having an opening in a lower surface of the soleplate intended to be in contact with the ground, and several studs. of damping which are partially positioned in said housing, at the rate of at least one damping pad per housing, and which, when not deformed, are partially protruding from said lower surface, each stud damping element being surrounded on all or part of its periphery by said lower surface, and being elastically deformable so as to be able to be compressed at least partially inside the corresponding housing, each damping pad comprising, at the top of its part protruding, an area of contact with the ground, which extends over its entire periphery and towards the interior of the stud by a surface co concave urbe, which is elastically deformable, and which allows a crushing of the damping pad with a decrease in the curvature of said concave curved surface.

According to a second aspect, the invention also relates to a boot sole having in its heel portion a plurality of housings, each having an opening in a lower surface of the sole intended to be in contact with the ground, and a plurality of studs. 'damping which are partially positioned in said housing, at least one damping pad per housing, and which, when not are deformed, are partially protruding from said lower surface, each cushion pad being surrounded on all or part of its periphery by said lower surface, and being designed to be resiliently compressed at least partially within the corresponding housing without lateral shear and without lateral displacement.

According to a third aspect, the invention also relates to a shoe sole having in its heel portion a plurality of housings, each having an opening in a lower surface of the sole intended to be in contact with the ground, and a plurality of studs. damping which are partly positioned in said housings, at the rate of at least one damping pad per housing, and which, when not deformed, are partially protruding from said lower surface, each pad of damping being surrounded over all or part of its periphery by said lower surface, and being designed to be resiliently compressible at least partially within the corresponding housing without undergoing lateral shear and without lateral displacement.

According to a fourth aspect, the invention also relates to a shoe outsole comprising, in its heel part, a lower surface intended to be in contact with the ground and a plurality of damping pads which are at least partly protruding by relative to said lower surface, and which are elastically deformable. The heel portion is divided laterally by a median longitudinal axis (M) into an inner heel zone (ZI) and an outer heel zone (ZE), and the sole has one and / or the other of the features (a). and (b)

(a) the maximum longitudinal distance (U), measured longitudinally along the median longitudinal axis (M), between the rear portion of the heel area and the center of gravity of the pad that is located in the inner heel zone (ZI) , and which, in the direction of the median longitudinal axis (M), furthest from said rear portion of the heel area, is less than the maximum longitudinal distance (L _e ), measured longitudinally along the median longitudinal axis (M), between the rear portion of the heel area and the center of gravity of the cushioning pad which is located in the outer heel zone (ZE), and which is in the direction of the axis longitudinal median (M), farthest from said rear portion of the heel area;

and or

(b) the damping pads, located in the outer heel zone (ZE), are distributed such that the more the damping pad is moved away from the rear part of the heel area, the longer the lateral distance (DL) separating the center of gravity of this damping pad of said median longitudinal axis (M) is important.

A second main objective of the invention is to provide a new shoe outsole having in its front portion projecting pads and elastically deformable, facilitating propulsion when walking.

A more particular object of the invention is to propose a new shoe outsole comprising, in its front part, projecting and elastically deformable studs, which facilitate propulsion during the walking of a person whose foot has undergone injuries. physiological and / or anatomical modifications related to aging, and in particular of which the forefoot has undergone deformations, of the hallux valgus type, toes in claws or hammers.

Thus, according to a fifth aspect, the subject of the invention is a soleplate having in its front part a plurality of front studs, which are elastically deformable, which in the undeformed state are at least partly protruding with respect to a lower surface of the front part intended to be in contact with the ground, and which promote the propulsion of the foot forward when they elastically resume their original shape. This sole is characterized by an internal phalangeal metatarsal segment ([CQ]) and an external phalangeal metatarsal segment ([CO]) which are intersecting at an intermediate metatarsal phalangeal point (C); a first front stud is positioned, on the external phalangeal metatarsal segment ([CO]), at a point (01) situated with respect to the intermediate metatarsal phalangeal point (C) at a distance equal to a quarter of the length of the external phalangeal metatarsal segment ([CO]); a second front stud is positioned, substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion of the sole, and between the front end of the sole and the first front stud; a third front pad is positioned on the internal phalangeal metatarsal segment ([CQ]), at a point (Q1) located with respect to the intermediate metatarsal phalangeal point (C) at a distance equal to one third of the length of the internal phalangeal metatarsal segment ([CQ]); a fourth front stud is positioned, substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end of the sole and the third front stud.

The invention also relates to a shoe, in particular adapted for a person whose foot has undergone physiological and / or anatomical changes related to aging, and having an outer outsole referred to above.

Brief description of the figures

The features and advantages of the invention will appear more clearly on reading the detailed description below of a particular variant embodiment of the invention, which particular embodiment variant is described by way of non-limiting and non-exhaustive example. of the invention, and with reference to the accompanying drawings in which:

FIG. 1 is a side view of an example of a shoe provided with an outsole,

- Figure 2 is a bottom view of a particular embodiment of an outer sole according to the invention.

FIG. 3 is a cross-sectional view of the heel portion, the outsole of Figure 2, at a rear damping pad and in the sectional plane III-III of Figure 2, the rear damping pad being in the undeformed state.

- Figure 4 is a cross sectional view of the rear damping pad of Figure 3 and its housing, when the rear damping pad is deformed during contact with the ground.

FIG. 5 is a cross-sectional view of the front portion of the outsole of FIG. 2, at a front stud and in the section plane V-V of FIG. 2, the front stud being at undeformed state.

- Figure 6 is a cross-sectional view of the front stud of Figure 5 and its housing, when the front stud is deformed during contact with the ground.

- Figure 7 is a top view of the outer sole of the sole of Figure 2 and a foot positioned relative to said sole.

FIG. 8 is a view from above of the outsole of the sole of FIG. 2 on which the external and internal metatarsal phalangeal segments are represented.

detailed description

There is shown in Figure 1 an example of a shoe with an outer sole 1, also called outsole. With reference to FIG. 2, which shows a bottom view of a particular variant of outsole 1 according to the invention, the sole 1 may in the usual way be broken down into three parts: a rear part 10, commonly referred to as a heel part, a central portion 12 corresponding to support part of the arch of the foot, and a front part 1 1 corresponding to the forefoot.

This outsole 1 is particularly adapted to facilitate walking a foot having undergone anatomical and physiological changes related to aging;

Heel part 10

Referring to Figures 2 and 3, the outer sole 1 has in its heel portion 10: a first layer of material C1 having a plurality of through-holes 100, each of which has an opening 100a in a lower surface 101 of the first layer of material C1; this lower surface 101 of the material layer C1 forms the lower surface of the soleplate intended to be in contact with the ground S, and

a second layer of material C2, which is positioned above the first layer C1, and in which several damping pads 102 are formed, for example by molding; these damping pads 102 are elastically deformable, and are positioned in said housings 100, at the rate of at least one stud 102 per housing 100.

With reference to FIG. 2, in the undeformed state, each damping pad 102 is a solid element, projecting from the bottom face 102e of the material layer C2 and passing through the corresponding housing 100 , being partially protruding from said lower surface 101, and being surrounded on all or part of its periphery by said lower surface 101.

Preferably, the majority of each damping pad 102 is positioned inside the corresponding housing 100, and only a small portion of the pad 101 in the undisturbed state is protruding from said lower surface 101.

In the particular variant of FIG. 2, all the damping pads 102 are not identical, and in particular do not have the same dimension. In another variant, the pads of depreciation in the heel portion 10 could be identical and have the same dimension.

With reference to FIG. 4, each damping pad 102 is elastically deformable so as to be able to be compressed at least partially inside the corresponding housing 100 under the effect of a compression force F (FIG. 4) perpendicular to the lower face 101 of the sole, in particular during a pressure contact of the damping pad 102 on a rigid flat surface S such as a hard floor. More particularly, with reference to FIGS. 3 and 4, and unlike the deformable pads of US application request US 2013/0263469, each damping pad 102 is designed to be resiliently compressible at least partially within the corresponding housing 100, without undergoing lateral shear and without lateral displacement, that is to say without shearing and without being displaced in a plane substantially parallel to the lower face 101 of the sole. This advantageously provides a damping without risk of instability for the foot during walking.

Each damping pad 102 has, at the top of its projecting portion 102a, a ground contacting surface 102b, which extends over its entire periphery and towards the inside of the stud by a concave curved surface 102c. This concave curved surface 102c is elastically deformable, and allows a crushing of the stud 102 with a decrease in the curvature of said concave curved surface 102c under the effect of a compression force F (FIG. 4) perpendicular to the lower face 101 the sole, in particular during a contact with pressure of the damping pad 102 on a rigid flat surface S, such as a hard floor.

This specific deformation of each damping pad 102 resulting from the presence of this elastically deformable concave curved surface 102c makes it possible, during a contact of the heel with the ground, to absorb the impact effectively, without creating instability at the level of the zone. heel, and thus effectively protects the heel area against shocks during walking.

More particularly, but not necessarily, damping pads

102 are designed such that said deformation of the concave curved surface 102c (crushing of the pad 102 with a decrease in the curvature of said surface) is obtained at least when the soleplate undergoes static, with respect to a rigid flat horizontal surface S , a vertical compression F (that is to say a compression perpendicular to the lower face 101 of the sole) over the entire surface of the soleplate under a load of at least 60 kg, and more particularly under a load of between 60 kg and 180 kg.

Preferably, in order to improve the absorption of shocks and facilitate the compression of each damping pad 102 and its crushing with a decrease in the curvature of said concave curved surface 102c, the surface 102b of contact with the ground of a damping pad 102 extends over its entire periphery and outwardly of the stud 102 by a convex curved surface 102d (FIGS. 3 and 4).

More particularly, this convex curved surface 102d of a damping pad connects the lower face 102 of said layer of material C2 to the surface 102b of contact with the ground of the damping pad.

More particularly, at least the portion 102a projecting from a damping pad in the undeformed state, which projects from said lower surface 10, forms a solid of revolution having a central axis A of substantially perpendicular symmetry. at said lower surface 101 (Figures 1 and 3).

Each damping pad 102 can thus deform symmetrically about its central axis A.

In the particular variant illustrated, the concave curved surface 102c forms a central bowl at the top of the stud 102 centered on this axis A.

Each damping pad may more particularly be made by molding in an elastomeric material, and more particularly in a thermoplastic elastomer material (TPE) having a suitable hardness, and preferably in an expanded or unexpanded thermoplastic elastomer material of polyurethane (TPU) .

By way of non-limiting example of the invention, each damping pad

102 in the heel portion 10 was made of a thermoplastic polyurethane elastomer (TPU) having a hardness of about 30 to 55 shore A, and preferably about 30 to 35 shore A. With reference to FIG. D1 of each damping pad 102 in the undeformed state (largest dimension of the stud in a plane parallel to the lower face 101 of the sole) was between 7mm and 12mm. The maximum distance of between the contact surface 102b with the ground S and the underside 101 of the soleplate was less than 1 mm, and more particularly substantially equal to 0.5 mm. The diameter D2 of the concave curved surface 102c in the undeformed state (FIG. 3) was about 4mm.

More particularly, with reference to FIG. 4, the space in the housing 100 around a damping pad 102 is large enough so that the portion 102a of said damping pad, which projects from said lower surface 101 before deformation of the stud, is able to deform elastically in contact with the ground S without undergoing radial compression.

More particularly, with reference to FIG. 4, the damping pad 102 is elastically deformable so that it can be completely compressed inside the corresponding housing 100.

More particularly, but not necessarily, the damping pads 102 are designed so that they can be compressed completely inside the corresponding housing 100 when the soleplate undergoes a static, relative to a rigid flat horizontal surface S, a vertical compression F (that is to say a compression perpendicular to the underside 101 of the sole) over the entire surface of the sole under a load of at least 60Kg, and preferably under a load of between 60Kg and 180Kg.

More particularly, with reference to FIG. 2, the number of damping pads 102 is the same on either side of a median longitudinal axis M of the heel part 10, which laterally divides the heel portion 10 of the soleplate. in an inner heel zone ZI and in an outer heel zone ZE. This arrangement contributes to a flat attack of the heel to the ground, which is better adapted to the walking of a foot having undergone anatomical and / or physiological changes related to aging.

More particularly, the damping pads 102 are positioned in the inner zone ZI and in the outer zone ZE so as to improve the flat attack and improve the unwinding of the foot. They have for this purpose one or the other and / or the other of the following technical positioning characteristics: (a) the damping pad referenced 102-I is the damping pad, which is located in the inner heel zone ZI, and which, in the direction of the median longitudinal axis M, is furthest from the rear portion 10a of the heel zone 10. The damping pad referenced 102-E is the damping pad, which is located in the outer heel zone ZE, and which is, in the direction of the median longitudinal axis M, farthest from the rear portion 10a of the heel zone 10. The maximum longitudinal distance L, measured longitudinally along the median longitudinal axis M, between said furthest pad 102-1 and the rear portion 10a of the heel area 10 is less than the maximum longitudinal distance L _e measured longitudinally along the median longitudinal axis M, between said furthest pad 102-E and the rear portion 10 a of the heel area 10.

(b) the damping pads 102, located in the outer heel zone ZE, are distributed such that the longer the damping pad 102 is removed from the rear portion 10a of the heel area 10, the longer the lateral distance DL separating this damping pad 102 of said median longitudinal axis M is important.

(c) said maximum longitudinal distance L is less than 20% of the total length L of the sole, and preferably less than 17% of the total length L of the sole.

(d) said longitudinal maximum distance L _e , is between 12% and 35% of the total length L of the sole, and preferably between 15% and 30% of the total length L of the sole.

(e) the damping pads, 102 situated in the outer heel zone ZE, are distributed so that the line LC passing through the centers of gravity of these damping pads 102 is a curved line whose concavity is oriented towards said axis The maximum longitudinal distance L, the maximum longitudinal distance Le, and lateral distance DL are measured from the centroid of the corresponding stud, and therefore more particularly from the center of the stud. corresponding when it has a central axis of symmetry as illustrated in the particular embodiment of the accompanying figures.

Front part 1 1

The sole 1 also has in its front portion 1 1 several front pads 1 12, which are elastically deformable, and in the undeformed state, are projecting relative to the lower surface 1 1 1 of the front part 1 1 intended to be in contact with the ground.

More particularly, the outsole 1 comprises in its front part 1 1:

a first layer of material C3 having a plurality of through-holes 1, each having an opening 1 10a in a lower surface 1 1 1 of the first layer of material C 3; this lower surface 1 1 1 of the layer of material C 3 forms the lower surface of the soleplate intended to be in contact with the ground S at the level of the front part of the sole, and

a second layer of material C4, which is positioned above the first layer C3, and in which several front pads 1 12 are formed, for example by molding; these front pads 1 12 are elastically deformable, and are positioned in said housing 1 10, at the rate of at least one pad 1 12 per housing 100.

When walking, when the weight of the body is transferred to the front of the foot, each front pad compresses in contact with the ground (Figure 6). Then when the weight on each compressed front pad 1 12 decreases due to the unwinding of the pitch, said stud before, elastically resumes its original shape, and thanks to its low remanent deformation and its convex shape exerts on the ground a force that promotes the propulsion of the foot forward. The pads before 1 12 thus have the function of promoting the propulsion of the foot forward as they elastically resume their original shape.

More particularly, with reference to FIG. 5, the top of the projecting portion 1 12a of a front stud 1 12, in the undeformed state, forms a surface

1 12b of contact of the stud with the ground which is convex. More particularly, the convex contact surface 1 12b of a front stud 1 12 is substantially spherical.

More particularly, the protruding portion 1 12a of a front stud 1 12, which protrudes from said lower surface 1 1 1 when the front stud is not deformed, forms a solid of revolution having a central axis of symmetry. A substantially perpendicular to said lower surface 1 1 1.

More particularly the sole 1 has in its front portion 1 1 several housing 1 10, each having an opening 1 10a in the lower surface 1 1 1 of the sole intended to be in contact with the ground. The front pads 1 12 are positioned in said housing, at least one plot per housing. Each front stud 1 12 is surrounded on all or part of its periphery by said lower surface 1 1 1, and is elastically deformable so as to be able to be compressed at least partially inside the corresponding housing 1 10 during a contact of the front stud 1 12 with ground S.

More particularly each front pad 1 12 is a solid member and / or is designed to be resiliently compressible at least partially within the corresponding housing 1 10 without undergoing lateral shear and without lateral displacement.

More particularly, the front studs 1 12 are formed protruding from the lower face 102e of the material layer C4, and the entire surface of each front stud 1 12, in the undeformed state is convex, and preferably substantially spherical.

More particularly, the space in the housing 1 10 around a front stud 1 12 is large enough for the protruding portion 1 12a of said stud before 1 12, which protrudes from said lower surface 1 1 1 when the front stud 1 12 is not deformed, elastically deforms in contact with the ground without undergoing radial compression.

More particularly, each front stud 1 12 is elastically deformable so as to be completely compressed inside the corresponding housing 1 10. The pads before 1 12 are more particularly, but not necessarily, designed so that they can be compressed completely to the interior of the housing 1 10 corresponding when the sole undergoes static, relative to a horizontal surface, a vertical compression over the entire surface of the sole under a load of at least 60Kg, and more particularly under a load of between 60Kg and 180Kg.

Each front stud 1 12 may more particularly be produced by molding in an elastomeric material, and more particularly in a thermoplastic elastomer material (TPE) having a suitable hardness, and preferably in an expanded or unexpanded thermoplastic elastomer material of polyurethane (TPU). .

By way of non-limiting example of the invention, each damping pad 1 12 in the front part 1 1 was made of expanded TPU and had a hardness of between 50 and 70 shore A. The maximum distance d between the surface of contact 1 12b with the ground S and the lower face 1 1 1 of the sole was less than 1 mm, and more particularly substantially equal to 0.5 mm.

With reference to FIG. 5, the diameter D1 (largest dimension of the stud in a plane parallel to the lower face 1 1 1 of the sole) of a front stud 1 12 in the undeformed state was between 5 mm and 10 mm .

Positioning the front studs

Referring to Figure 7, the sole 1 comprises ten pads before 1 12 which are more specifically identified respectively by the references 1 12A to 1 12J. This sole 1 is adapted to serve as an outsole to a round toe shoe adapted to wear a standard foot P Lp length less than the length of L of the sole 1, given the stem 2 (Figure 1) shoe.

In the field of shoe manufacturing, each sole is associated with a standard foot length I Lp. Depending on the type of shoe (round toe, square toe, pointed toe, open sandal,), it was statistically established an average relationship between the length L of an outsole 1 and the standard length Lp of foot associated with it . These known reports are provided in the tables below.

Rapport L / Lp - Shoe or sandal closed at the front and heel Shoe type L / Lp

Round Toe 1 .04

Square end 1 .03

Pointed toe 1 .06

Relationship L and Lp - Open heel and / or front sandal (round, square or pointed toe)

In FIG. 8, the limits represented by the dummy lines Lp (9%), Lp (40%) and Lp (75%) are positioned along the longitudinal axis M of the heel part 10 respectively at a distance from each other. at the rear portion T of the heel of the foot P which is respectively equal to 9%, 40% and 75% of the foot length Lp. The median longitudinal axis M of the heel portion 10 corresponds in practice to the longitudinal median of the sole at the level of the limit Lp (9%).

The metatarsal Phalangian intermediate point C is the midpoint of the sole width at the Lp limit (75%).

The fictitious line segment [CO] (between the metatarsal phalangeal point C and the point O on the outer edge of the sole) is referred to in this text as the outer phalangeal metatarsal segment. The point O is positioned on the outer edge of the sole, so that this external phalangeal metatarsal segment [CO] forms an angle of 62 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsal phalangeal, and which is parallel to the median longitudinal axis M of the heel part 10.

The fictitious line segment [CQ] (between the intermediate point C and the point Q on the inner edge of the sole) is referred to in this text as internal phalangeal metatarsal segment. The point Q is positioned on the inner edge of the sole, so that this internal phalangeal metatarsal segment [CQ] forms an angle of 78 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsal phalangeal, and which is parallel to the median longitudinal axis M of the part heel piece 10.

In anatomy of the foot, the metatarsal phalangeal joint of the foot unites the head of the metatarsal bones at the base of the first phalange of the toe. With reference to FIG. 7, the internal phalangeal metatarsal segment [CQ] corresponds in practice to a line segment connecting the metatarsophalangeal joints of the big toe 3 and the second toe 4. The external phalangeal metatarsal segment [CO] corresponds in practice to a line segment connecting the metatarsal phalangeal joints of the third toe 5, the fourth toe 6, and the fifth toe 7.

Referring to FIG. 8, the points Q1 and Q2 divide the metatarsal inner phalangeal segment [CQ] into three equal parts. The point Q1 is thus located with respect to the metatarsal phalangeal intermediate point C at a distance equal to one-third of the length of the internal phalangeal metatarsal segment [CQ], and the point Q2 is thus located with respect to the intermediate metatarsal phalangeal point C at a distance of distance equal to two-thirds of the length of the internal metatarsal phalangeal segment [CQ]. The points O1, O2, and O3 divide the outer phalanx metatarsal segment [CO] into four equal parts. The point 01 is thus located with respect to the metatarsal phalangeal intermediate point C at a distance equal to a quarter of the length of the external metatarsal phalangeal segment [CO]; point 02 is located with respect to the metatarsal phalangeal intermediate point C at a distance equal to half the length of the external phalangeal metatarsal segment [CO]; point 03 is located in relation to the metatarsal phalangeal intermediate point C at a distance equal to three quarters of the length of the external phalangeal metatarsal segment [CO].

With reference to FIG. 7, the front pad 1 12C is positioned along said internal phalangeal metatarsal segment [CQ] at the point Q1, and the front pad 1 12E is positioned along said internal phalangeal metatarsal segment [CQ] at the from point Q2. The front pad 1 12A is positioned along said outer phalangeal metatarsal segment [CO] at the point 01. The front stud 1 12G is positioned along said outer phalangeal metatarsal segment [CO] at the point 02. The front stud 1 121 is positioned along said segment external phalangeal metatarsal [CO] at point 03. The words "positioned at level" mean that the corresponding point (Q1, Q2, 01, 02, 03) is positioned near or within the area covered by the corresponding front pad (1 12C, 1 12E, 1 12A, 1 12G, 1 121) without this corresponding point (Q1, Q2, 01, 02, 03) being necessarily centered with respect to the front stud associated therewith.

As a result, in practice, when a foot P is positioned in a boot provided with this outsole 1, the front pad 12C is positioned in the region of the metatarsal phalangeal joint of the second toe 4; the front stud 1 12E is positioned in the region of the metatarsal phalangeal joint of the big toe 3; the front stud 1 12A is positioned in the region of the metatarsal phalangeal joint of the third toe 5; the stud before 1 12G is positioned in the region of the metatarsal phalangeal joint of the fourth toe 6; the front stud 1 121 is positioned in the region of the metatarsal phalangeal joint of the fifth toe 7.

With reference to FIG. 7, the front stud 1 12B is positioned, in a direction substantially parallel to the median longitudinal axis M of the part 10, between the front end 1 1a of the sole and the front stud 1 12A, and at a distance DP relative to said first front pad 1 12A more particularly between 5% and 15% of this foot length, and preferably between 6% and 13% of the foot length Lp associated with the sole. It is the same for stud before 1 12D with respect to the front stud 1 12C, for the front stud 1 12F relative to the front stud 1 12E, for the front stud 1 12H with respect to the front stud 1 12G, and for the stud before 1 12J with respect to the front stud 1 121. It thus follows that the pads before 1 12B, 1 12D, 1 12F, 1 12H, 1 12 J are positioned relative to the pads respectively before 1 12A, 1 12C, 1 12E , 1 12G, 1 121 so that the front stud 1 12B is positioned in the region of the inter-phalangeal joint of the third toe 5, the 1D front stud is positioned in the region of the inter-phalangeal joint of the second toe 4, that the front stud 1 12F is positioned in the region of the inter-phalangeal articulation of the big toe 3, that the front stud 1 12H is positioned in the region of the articulation inter phalangeal of the fourth toe 6, and that the front stud 1 12J is positioned in the region of the inter-phalangeal articulation of the fifth toe 7.

With reference to FIG. 8, the line extending along the median longitudinal axis M from the rear part 10a of the heel part 10 to the central point C at the limit Lp (40%), and which extends, to the front end 1 1 a of the sole, by the inclined axis M 'passing through the intermediate point C, corresponds to the unwinding line of the foot when walking.

When the forefoot has not undergone any anatomical modification related to aging, the propulsion on the forefoot during the unwinding of the foot is done sequentially in a first phase essentially by pressing on the fifth toe 7 and on the fourth toe 6 , and in a second phase by pressing on the big toe 3. The second toe 4 and the third toe 5 are thus relatively under-solicited. On the other hand, when the forefoot has undergone anatomical changes related to aging (hallux valgus, toes in claws or hammers) the unwinding of the foot is modified, so that the support on the fifth toe 7 and on the fourth toe 6 is weaker, and that the support is more important on the second toe 4 and the third toe 5. The front pads 1 12A, 1 12B, 1 12C and 1 12D in the region of the second toe 4 and the third toe 5 thus play an important role in facilitating forward propulsion of the foot during the unwinding of this type of foot. The front pads 1 12E and 1 12F in the region of the big toe 3 also play an important role in facilitating forward propulsion of the foot during the unwinding of this type of foot, since the support on the big toe 3 is also important.

Preferably, as illustrated in the particular variant of FIG. 7, the front pads 1 12E and 1 12F in the region of the big toe 3 are advantageously larger than the pads before 1 12A, 1 12B, 1 12C and 1 12D in the region of the second toe 4 and the third toe 5, so that the thrust they exert due to their elasticity and their small residual deformation. Similarly, the seventh front stud 12G and the eighth front stud 12H in the region of the fourth toe 6 are smaller than the pads before 1 12A, 1 12B, 1 12C and 1 12D in the region of the second toe 4 and the third toe 5. The ninth one before 1 121 and the tenth front stud 1 12J are smaller than the first 1 12A, second 1 12B, third 1 12C and fourth 1 12D front studs, and are also smaller than the seventh front stud 1 12G and the eighth front stud 1 12H.

Central part 12

In the central portion 12, the sole 1 comprises a stiffening insert

120 (Figure 2), still commonly called "shank", which has more particularly the form of a boomerang, which is positioned mainly in the outer zone of the central portion 12.

This insert 120 is for example a plastic part.

This insert 120 connects the heel portion 10 to the front portion 1 1, and supports the arch, so as to reduce pronation and relieve loading on the forefoot. It allows during the unfolding of the foot to support the arch by making the link between the heel part 10 (back of the foot) and the front part 1 1 (forefoot) of the sole.

Claims

Footwear outsole (1) having in its heel portion (10) a plurality of seats (100), each having an opening (100a) in a bottom surface (101) of the soleplate for contact with the ground, and a plurality of damping pads (102) which are partly positioned in said housings (100), at least one damping pad (102) per housing (100), and which, when not deformed, are partially protruding from said lower surface (101), each pad (102) being surrounded over all or part of its periphery by said lower surface (101), and being elastically deformable so as to be able to be compressed at at least partially within the corresponding housing (100), each damping pad (102) having, at the top of its projecting portion (12a), a surface (102b) of contact with the ground, which extends over any its periphery and towards the interior of the stud (102) by a concave curved surface (102c), which is elastically deformable, and which allows a crushing of the damping pad (102) with a decrease in the curvature of said concave curved surface (102c).

Sole according to claim 1, wherein each damping pad (102) is designed to be resiliently compressible at least partially within the corresponding housing (100) without undergoing lateral shear and without lateral displacement.

Sole according to any one of the preceding claims, wherein the surface (102b) of contact with the ground of a damping pad (102) extends over its entire periphery and towards the outside of the pad (102) by a convex curved surface (102d).

The sole of claim 3 comprising a layer of material (C2) wherein the damping pads (102) are protruded from the bottom face (102e) of said material layer, and wherein said convex curved surface (102d) of a damping pad connects the lower face (102e) of said layer of material (C2) on the ground engaging surface (102b) of the damping pad.

Footwear outsole (1) having in its heel portion (10) a plurality of seats (100), each having an opening (100a) in a bottom surface (101) of the soleplate for contact with the ground, and a plurality of damping pads (102) which are partly positioned in said housings (100), at least one damping pad (102) per housing (100), and which, when not deformed, are partially protruding from said lower surface (101), each cushion pad (102) being surrounded over all or part of its periphery by said bottom surface (101), and being designed to be resiliently compressible at least partially inside the corresponding housing (100) without undergoing lateral shear and without lateral displacement.

Sole according to claim 5, wherein each pad (102) has, at the top of its projecting portion (12a), a surface (102b) of contact with the ground, which extends over its entire periphery and towards the ground. the interior of the stud (102) by a concave curved surface (102c), which is elastically deformable, and which allows a crushing of the damping pad (102) with a decrease in the curvature of said concave curved surface (102c).

Sole according to any one of claims 5 or 6, wherein the surface (102b) of contact with the ground of a damping pad (102) extends over its entire periphery and towards the outside of the pad (102). by one convex curved surface (102d).

8. Sole according to claim 7, comprising a layer of material (C2) in which the damping pads (102) are formed projecting relative to the lower face (102e) of said layer of material, and wherein said surface convex curve (102d) of a damping pad connects the lower face (102e) of said layer of material (C2) to the surface (102b) of contact with the ground of the damping pad.

Footwear outsole (1) having in its heel portion (10) a plurality of seats (100), each having an opening (100a) in a bottom surface (101) of the soleplate for contact with the ground, and a plurality of damping pads (102) which are partly positioned in said housings (100), at least one damping pad (102) per housing (100), and which, when not deformed, are partially protruding from said lower surface (101), each pad (102) being surrounded over all or part of its periphery by said lower surface (101), and being elastically deformable so as to be able to be compressed at at least partially within the corresponding housing (100), each damping pad (102) having, at the top of its projecting portion (12a), a surface (102b) of contact with the ground, which extends over any its periphery and towards the interior of the stud (102) by a concave curved surface (102c), and which extends over its entire periphery and outwardly of the stud (102) by a convex curved surface (102d).

The sole of claim 9, comprising a layer of material (C2) in which the damping pads (102) are protruded from the bottom face (102e) of said layer of material, and wherein said surface convex curve (102d) of a plot damping means connects the lower face (102e) of said layer of material (C2) to the surface (102b) of contact with the ground of the damping pad. 1 1. Sole according to any one of the preceding claims, wherein the major part of a damping pad (102), in the undeformed state, is positioned inside the corresponding housing (100).

12. Sole according to any one of the preceding claims, wherein each damping pad (102) is a solid element.

13. Sole according to any one of the preceding claims, wherein the space in the housing (100) around a damping pad (102) is large enough for the portion (102a) of said damping pad ( 102), which protrudes from said lower surface (101) before deformation of the stud, is able to deform elastically under the effect of a compressive force (F) perpendicular to the lower surface (101) of the sole, without undergoing radial compression.

The sole as claimed in any one of the preceding claims, wherein at least the projecting portion (102a) of a non-deformed cushion pad (102) projecting from said bottom surface (101), forms a solid of revolution having a central axis of symmetry (A) substantially perpendicular to said lower surface

(101).

The sole of any one of the preceding claims, wherein each cushion pad (102) is resiliently deformable so that it can be fully compressed within the housing.

(100) corresponding.

16. Sole according to any one of the preceding claims, wherein the damping pads (102) are designed so that they can be compressed completely inside the housing (100) corresponding when the sole undergoes static, relative to a rigid flat horizontal surface, a vertical compression over the entire surface of the soleplate under a load of at least 60 kg, and preferably under a load of between 60 kg and 180 kg.

A sole according to any one of the preceding claims, wherein each damping pad (102) is designed such that crushing of the pad (102) with a decrease in the curvature of the concave curved surface (102c) is obtained at least when the soleplate undergoes static, relative to a rigid flat horizontal surface S, a vertical compression over the entire surface of the soleplate under a load of at least 60 kg, and more particularly under a load of between 60 kg and 180kg.

18. Sole according to any one of the preceding claims, wherein the number of damping pads (102) is the same on either side of a median longitudinal axis (M) of the heel part (10).

The sole of any one of the preceding claims, wherein the heel portion (10) is laterally divided by a median longitudinal axis (M) into an inner heel area (ZI) and an outer heel area (ZE), and in which the maximum longitudinal distance (U), measured longitudinally along the median longitudinal axis (M), between the rear portion (10a) of the heel area and the barycentre of the damping pad (102-1) which is located in the inner heel zone (ZI), which is, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the zone heel, is less than the maximum longitudinal distance (L _e ), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel area (10) and the barycentre of the damping pad (102). -E) which is located in the outer heel zone (ZE), and which is, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel zone (10).

The sole of any one of the preceding claims, wherein the heel portion (10) is divided laterally by a median longitudinal axis (M) into an inner heel area (ZI) and an outer heel area (ZE), and wherein the maximum longitudinal distance (L), measured longitudinally along the median longitudinal axis (M), between the rear portion (10a) of the heel area and the center of gravity of the dam pad (102-1) which is located in the inner heel zone (ZI), which, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel zone, is less than 20% of the total length ( L) of the sole, and more particularly less than 17% of the total length (L) of the sole.

21. Sole according to any one of the preceding claims, wherein the heel portion (10) is laterally divided by a median longitudinal axis (M) into an inner heel zone (ZI) and an outer heel zone (ZE), and in which the maximum longitudinal distance (L _e ), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel area (10) and the barycentre of the damping pad (102-E) which is located in the outer heel zone (ZE), and which, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel zone (10) is between 12% and 35% of the total length (L) of the sole, and more particularly between 15% and 30% of the total length (L) of the sole.

A sole according to any one of the preceding claims, wherein the heel portion (10) is laterally divided by a median longitudinal axis (M) into an inner heel zone (ZI) and an outer heel zone (ZE), and in which the damping pads (102) located in the outer heel zone (ZE) are distributed such that the longer the damping pad (102) is moved away from the rear part (10a) of the heel area, the longer the lateral distance (DL) separating the barycentre of this damping pad (102) from said median longitudinal axis (M) is important.

The sole of any one of the preceding claims, wherein the heel portion (10) is laterally divided by a median longitudinal axis (M) into an inner heel area (ZI) and an outer heel area (ZE), and wherein the damping pads (102), located in the outer heel zone (ZE), are distributed such that the line (C) passing through the centers of gravity of these damping pads (102) is a curved line ( LC) whose concavity is oriented towards said median longitudinal axis (M).

24. Sole according to any one of the preceding claims, wherein each pad (102) is made of an elastomer, more particularly in a thermoplastic elastomer

(TPE), and more particularly in a thermoplastic polyurethane elastomer (TPU).

The sole of any preceding claim, wherein each cushion pad (102) is made of a material having a hardness of about 30 to 55 Shore A, and more particularly 30 to 35 Shore A.

The sole according to any one of the preceding claims, wherein the maximum distance d between the lower face (101) of the soleplate and the contact surface (102b) with the ground of a damping pad (102) to the undeformed state is less than 1 mm, and more particularly substantially equal to 0.5 mm.

27. Sole according to any one of the preceding claims, wherein the diameter (D1) of a damping pad (102) in the undeformed state is between 7mm and 12mm.

28. Sole according to any one of the preceding claims, having in its front portion (1 1) several front pads (1 12), which are elastically deformable, and which in the undeformed state are at least partly protruding by relative to a lower surface (1 1 1) of the front part (1 1) intended to be in contact with the ground.

29. Sole according to claim 28 wherein the front studs (1 12) are adapted to elastically resume their original shape to promote the propulsion of the foot forward.

30. Sole according to any one of claims 28 or 29, wherein the top of the projecting portion (1 12a) of a front stud (1 12), in the undeformed state, forms a surface (1 12b ) contact of the front stud (1 12) with the ground which is convex.

31. Sole according to any one of claims 28 to 30, wherein at least the projecting portion (1 12a) of a front stud, which is projecting relative to said lower surface (1 1 1) when the front stud ( 1 12) is not deformed, forms a solid of revolution having a central axis of symmetry (A) substantially perpendicular to said lower surface (1 1 1).

The sole of claim 30, wherein the contact surface convex (1 12b) of a front stud (1 12) is substantially spherical.

33. Sole according to any one of claims 28 to 32, comprising in its front part several housings (1 10), each having an opening (1 10a) in the lower surface (1 1 1) of the sole intended to be in contact with the ground, and wherein the front studs (1 12) are positioned in said housings, at the rate of at least one stud per housing, in which each front stud (1 12) is surrounded on all or part of its periphery by said lower surface (1 1 1), and is elastically deformable so as to be able to be compressed at least partially inside the corresponding housing (1 10) during contact of the front stud (1 12) with the ground . 34. Sole according to claim 33, wherein the space in the housing (1 10) around a front stud (1 12) is large enough so that the projecting portion (1 12a) of said front stud, which is in protruding relative to said lower surface (1 1 1) when the front stud (1 12) is not deformed, elastically deforms in contact with the ground without undergoing radial compression.

35. Sole according to any one of claims 33 or 34, wherein each front stud (1 12) is elastically deformable so as to be completely compressed inside the corresponding housing.

36. Sole according to claim 35, wherein the front pads (1 12) are designed so that they can be compressed completely inside the housing (1 10) corresponding when the sole is subjected to static, relative to a horizontal surface rigid plane, vertical compression over the entire surface of the sole under a load of at least 60Kg, and preferably under a load of between 60Kg and 180Kg.

37. Sole according to any one of claims 28 to 36, wherein each front stud (1 12) is designed to be resiliently compressible at least partially within the corresponding housing (1 10) without undergoing lateral shearing and without lateral displacement.

The sole according to any one of claims 28 to 37, wherein each front stud (1 12) is a solid member.

39. A sole according to any one of claims 28 to 38, comprising a layer of material (C2) in which the front pads (1 12) are formed protruding from the lower face (102e) of said layer of material, and in which the entire surface of each front pad (1 12) in the undeformed state is convex, and preferably substantially spherical.

40. A sole according to any one of the preceding claims, characterized by an internal phalangeal metatarsal segment ([CQ]) and an external phalangeal metatarsal segment ([CO]) which are intersecting at an intermediate point metatarsal phalangeal (C), sole wherein a first front pad (1 12A) is positioned on the outer phalarangular metatarsal segment ([CO]) at a point (O1) with respect to the intermediate metatarsal phalangeal point (C) at a distance equal to a quarter of the length of the external metatarsal phalangeal segment ([CO]), wherein a second front pad (1 12B) is positioned, substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10); ) of the sole, and between the front end (1 1 a) of the sole and the first front stud (1 12A), in which a third front stud (1 12C) is positioned, on the internal phalangeal metatarsal segment

([CQ]) at a point (Q1) in relation to the intermediate point metatarsal phalangeal (C) at a distance equal to one-third of the length of the inner phalangeal metatarsal segment ([CQ]), and wherein a fourth front pad (1 12D) is positioned substantially in the longitudinal direction parallel to the axis longitudinal median (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the third front stud (1 12C).

41. Sole according to claim 40, which is associated with a foot length (Lp), and wherein the distance (DP) between the first front stud (1 12A) and the second front stud (1 12B) is between 5% and 15% of this length of foot, and preferably between 6% and 13% of this length of foot (Lp).

42. A sole according to claim 40 or 41, which is associated with a foot length (Lp), and wherein the distance (DP) between the third front stud

(1 12C) and the fourth front stud (1 12D) is 5% and 15% of this length of foot, and preferably between 6% and 13% of this length of foot (Lp). The sole according to any one of claims 40 to 42, wherein a fifth front pad (1 12E) is positioned on the inner metatarsal phalangeal segment ([CQ]) at a point (Q2) located by ratio to the metatarsal phalangeal intermediate point (C) at a distance equal to two-thirds of the length of the external metatarsal phalangeal segment ([CQ]), and wherein a sixth front pad (1 12F) is positioned substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the fifth front stud (1 12E). 44. A sole according to claim 43, which is associated with a foot length (Lp), and wherein the distance (DP) between the fifth front stud (1 12E) and the sixth front stud (1 12F) is between 5 % and 15% of this length of foot (Lp), and preferably between 6% and 13% of this length of foot (Lp).

45. A sole according to claim 43 or 44 wherein the fifth front stud (1 12E) and the sixth front stud (1 12F) are larger than the first

(1 12A), second (1 12B), third (1 12C) and fourth (1 12D) forward pads.

46. Sole according to any one of claims 43 to 45, wherein a seventh front stud (1 12G) is positioned, on the external metatarsal phalangeal segment ([CO]), at a point (02) located by ratio at the metatarsal phalangeal intermediate point (C) at a distance equal to half of the external phalangeal metatarsal segment ([CO]). 47. A sole according to claim 46, wherein an eighth front stud (1 12H) is positioned substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the seventh front stud (1 12G).

48. A sole according to claim 47, which is associated with a foot length (Lp), and wherein the distance (DP) between the seventh front stud (1 12G) and the eighth front stud (1 12H) is between 5 % and 15% of this foot length (Lp), and preferably between 6% and 13% of this length of foot (Lp).

49. A sole according to claim 47 or 48, wherein the seventh front stud (1 12G) and the eighth front stud (1 12H) are smaller than the first (1 12A), second (1 12B), third ( 1 12C) and fourth (1 12D) front pads

The sole according to any one of claims 47 to 49, wherein a ninth front stud (1121) is positioned on the outer phallangeal metatarsal segment ([CO]) at a point (03) located by ratio to the metatarsal phalangeal intermediate point (C) at a distance equal to three quarters of the length of the external metatarsal phalangeal segment ([CO]).

51. Sole according to claim 50, wherein a tenth front stud (1 12J) is positioned substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end. (1 1 a) of the sole and the ninth front stud

(1,121)

52. Sole according to claim 50 or 51, which is associated with a foot length (Lp), and wherein the distance (DP) between the ninth front stud (1 121) and the tenth front stud (1 12J) is included between between

5% and 15% of this length of foot (Lp), and preferably between 6% and 13% of this length of foot (Lp).

53. Sole according to claim 51 or 52, wherein the ninth front stud (1 121) and the tenth front stud (1 12J) are smaller than the first (1 12A), second (1 12B), third (1 12C) ) and fourth (1 12D) front pads, and preferably are also smaller than the seventh front stud (1 12G) and the eighth front stud (1 12H). 54. Sole according to any one of claims 28 to 53, wherein each front stud (1 12) is made of an elastomer, more particularly a thermoplastic elastomer (TPE), and more particularly in a thermoplastic polyurethane elastomer ( TPU).

The sole according to any one of claims 28 to 54, wherein each front stud (1 12) is made of a material having a hardness between 50 and 70 Shore A.

The sole according to any one of claims 28 to 55, wherein the maximum distance d between the underside (1 1 1) of the sole and the

5 contact surface (1 12b) with the ground of a front stud (1 12) is less than

1 mm, and more particularly substantially equal to 0.5 mm.

57. Sole according to any one of claims 28 to 56, wherein the diameter (D1) of a front stud in the undeformed state is between0 5mm and 10mm.

58. Sole according to any one of the preceding claims, comprising in its central part (12) a stiffening insert (120) which connects the heel part (10) to the front part (1 1), and which makes it possible to support the arch of the foot.

59. A soleplate having in its front part (1 1) a plurality of front pegs (1 12), which are elastically deformable, which in the undeformed state are at least partly protruding from a lower surface (1 1 1) the front part (1 1) intended to be in contact with the ground, and which promote the propulsion of the foot forward when they resiliently resume their initial shape, which sole is characterized by a metatarsal segment internal phalangeal ([CQ]) and by an external phalangeal metatarsal segment ([CO]) which are intersecting at a metatarsal phalangeal intermediate point (C), a sole in which a first front pad (1 12A) is positioned, on the segment external phalangeal metatarsal ([CO]), at a point (O1) with respect to the metatarsal phalangeal intermediate point (C) at a distance equal to one quarter of the length of the external phalangeal metatarsal segment ([CO]), in which a second plo t before (1 12B) is positioned, substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the first front stud (1 12A), in which a third front stud (1 12C) is positioned on the internal phalangeal metatarsal segment ([CQ]), at a point (Q1) located with respect to the metatarsal phalangeal intermediate (C) at a distance equal to one-third of the length of the inner phalangeal metatarsal segment ([CQ]), and wherein a fourth forward pad (1 12D) is positioned, substantially in the longitudinal direction parallel to the medial longitudinal axis (M) of the heel part (10) of the sole, and between the front end (1 1 a) of the sole and the third front stud (1 12C).

60. A sole according to claim 59, which is associated with a foot length (Lp), and wherein the distance (DP) between the first front stud (1 12A) and the second front stud (1 12B) is between 5 % and 15% of this length of foot, and preferably between 6% and 13% of this length of foot (Lp).

61. Sole according to claim 59 or 60, which is associated with a foot length (Lp), and wherein the distance (DP) between the third front stud (1 12C) and the fourth front stud (1 12D) is 5% and 15% of this foot length, and preferably between 6% and 13% of this foot length (Lp).

The sole according to any one of claims 59 to 61, wherein a fifth front pad (1 12E) is positioned on the inner phalangeal metatarsal segment ([CQ]) at a point (Q2) located by ratio to the metatarsal phalangeal intermediate point (C) at a distance equal to two-thirds of the length of the external metatarsal phalangeal segment ([CQ]), and wherein a sixth front pad (1 12F) is positioned substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the fifth front stud (1 12E).

63. A sole according to claim 62, which is associated with a foot length (Lp), and wherein the distance (DP) between the fifth front stud (1 12E) and the sixth front stud (1 12F) is between 5 % and 15% of this length of foot (Lp), and preferably between 6% and 13% of this

5 foot length (Lp).

64. A sole according to claim 62 or 63 wherein the fifth front stud (1 12E) and the sixth front stud (1 12F) are larger than the first (1 12A), second (1 12B), third (1 12C) and fourth (1 12D) pads o before.

65. A sole according to any one of claims 62 to 64, wherein a seventh front stud (1 12G) is positioned on the external metatarsal phalangeal segment ([CO]), at a point (02) located by ratio to the metatarsal phalangeal intermediate point (C) at a distance equal to half of the external metatarsal phalangeal segment ([CO]).

66. A sole according to claim 65, wherein an eighth front stud (1 12H) is positioned substantially in the longitudinal direction 0 parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between front end (1 1 a) of the sole and the seventh front stud (1 12G).

67. A sole according to claim 66, which is associated with a length of 5 feet (Lp), and wherein the distance (DP) between the seventh front stud

(1 12G) and the eighth front pad (1 12H) is between 5% and 15% of this length of foot (Lp), and preferably between 6% and 13% of this foot length (Lp). The sole according to claim 66 or 67, wherein the seventh front stud (1 12G) and the eighth front stud (1 12H) are smaller than the the first (1 12A), second (1 12B), third (1 12C) and fourth (1 12D) forward pads

69. A sole according to any one of claims 66 to 68, wherein a ninth front stud (1121) is positioned on the outer phallangeal metatarsal segment ([CO]), at a point (03) located by ratio to the metatarsal phalangeal intermediate point (C) at a distance equal to three quarters of the length of the external metatarsal phalangeal segment ([CO]). 70. A sole according to claim 69, wherein a tenth front stud (1 12J) is positioned substantially in the longitudinal direction parallel to the median longitudinal axis (M) of the heel portion (10) of the sole, and between the front end (1 1 a) of the sole and the ninth front stud (1 121).

71. Sole according to claim 70, which is associated with a foot length (Lp), and wherein the distance (DP) between the ninth front stud (1 121) and the tenth front stud (1 12J) is between 5 % and 15% of this foot length (Lp), and preferably between 6% and 13% of this length of foot (Lp).

72. Sole according to claim 70 or 71, wherein the ninth front stud (1 121) and the tenth front stud (1 12J) are smaller than the first (1 12A), second (1 12B), third (1 12C) ) and fourth (1 12D) front pads, and preferably are also smaller than the seventh front stud (1 12G) and the eighth front stud (1 12H).

73. Footwear outsole having, in its heel portion (10), a bottom surface (101) for contact with the ground and a plurality of cushioning pads (102) that are at least partly protruding from said lower surface (101), and which are deformable elastically, characterized in that the heel portion (10) is divided laterally by a median longitudinal axis (M) into an inner heel zone (ZI) and an outer heel zone (ZE), and in that it comprises the one and / or the other of the following characteristics (a) and (b):

(a) the maximum longitudinal distance (L), measured longitudinally along the median longitudinal axis (M), between the rear portion (10a) of the heel area and the centroid of the damping pad (102-1) which is located in the inner heel zone (ZI), which is, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel zone, is less than the maximum longitudinal distance (L _e ), measured longitudinally along the median longitudinal axis (M), between the rear portion (10a) of the heel area (10) and the barycentre of the cushioning pad (102-E) which is located in the outer heel area (ZE), and which is, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel area (10); and or

(b) the damping pads (102), located in the outer heel zone (ZE), are distributed such that the longer the damping pad (102) is away from the rear part (10a) of the heel area , the greater the lateral distance (DL) separating the barycentre of this damping pad (102) from said median longitudinal axis (M) is important.

74. Sole according to claim 73, wherein the maximum longitudinal distance (U), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel area and the barycentre of the damping pad ( 102-1) which is located in the inner heel zone (ZI), and which is, in the direction of the median longitudinal axis (M), furthest from said rear part (10a) of the zone heel, is less than 20% of the total length (L) of the sole, and more particularly less than 17% of the total length (L) of the sole.

75. Sole according to any one of claims 73 or 74, wherein the maximum longitudinal distance (L _e ), measured longitudinally along the median longitudinal axis (M), between the rear portion (10a) of the heel zone (10). ) and the barycentre of the damping pad (102-E) which is located in the outer heel zone (ZE), and which is, in the direction of the median longitudinal axis (M), furthest from said rear portion (10a) of the heel zone (10) is between 12% and 35% of the total length (L) of the sole, and more particularly between 15% and 30% of the total length (L) of the sole.

76. Sole according to any one of claims 73 to 75, wherein the damping pads (102), located in the outer heel zone (ZE), are distributed so that the line (C) passing through the centroids of these damping pads (102) is a curved line (LC) whose concavity is oriented towards said median longitudinal axis (M).

77. Shoe, particularly adapted for a foot having undergone physiological and / or anatomical changes related to aging, and comprising an outer outsole (1) according to any one of the preceding claims.