Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
  • A43B13/223—Profiled soles
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
  • A43B13/24—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B13/00—Soles; Sole-and-heel integral units
  • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
  • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
  • A43B13/24—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions
  • A43B13/26—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions projecting beyond the sole surface

Definitions

• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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)
• 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.
• This new shoe outsole is more particularly, but not exclusively, suitable for a foot having undergone physiological and / or anatomical changes related to aging.
• 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 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.
• FIG. 1 is a side view of an example of a shoe provided with an outsole
• FIG. 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.
• FIG. 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.
• FIG. 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.
• FIG. 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.
• Figure 1 an example of a shoe with an outer sole 1, also called outsole.
• 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;
• 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
• 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.
• 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.
• 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.
• damping pads 102 are not identical, and in particular do not have the same dimension.
• the pads of depreciation in the heel portion 10 could be identical and have the same dimension.
• 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.
• F compression force
• 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.
• 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.
• damping pads More particularly, but not necessarily, damping pads
• a vertical compression F that is to say a compression perpendicular to the lower face 101 of the sole
• 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).
• 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.
• Each damping pad 102 can thus deform symmetrically about its central axis A.
• 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) .
• TPE thermoplastic elastomer material
• TPU polyurethane
• each damping pad 102 in the undeformed state 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 was about 4mm.
• 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.
• the damping pad 102 is elastically deformable so that it can be completely compressed inside the corresponding housing 100.
• 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.
• a vertical compression F that is to say a compression perpendicular to the underside 101 of the sole
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• the convex contact surface 1 12b of a front stud 1 12 is substantially spherical.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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). .
• TPE thermoplastic elastomer material
• TPU polyurethane
• 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.
• 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 .
• 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.
• each sole is associated with a standard foot length I Lp.
• I Lp standard foot length
• 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.
• the metatarsal phalangeal joint of the foot unites the head of the metatarsal bones at the base of the first phalange of the toe.
• 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.
• 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]
• 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].
• the front pad 1 12C is positioned along said internal phalangeal metatarsal segment [CQ] at the point Q1
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• the sole 1 comprises a stiffening insert
• 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.

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• 2015
  • 2015-12-16 WO PCT/FR2015/053549 patent/WO2016097606A1/fr active Application Filing
  • 2015-12-16 CN CN201580068686.0A patent/CN106998854B/zh active Active
  • 2015-12-16 EP EP15821145.8A patent/EP3232846B1/de active Active

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