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EP3232846B1 - Outer sole for footwear, comprising damping studs - Google Patents

Outer sole for footwear, comprising damping studs Download PDF

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Publication number
EP3232846B1
EP3232846B1 EP15821145.8A EP15821145A EP3232846B1 EP 3232846 B1 EP3232846 B1 EP 3232846B1 EP 15821145 A EP15821145 A EP 15821145A EP 3232846 B1 EP3232846 B1 EP 3232846B1
Authority
EP
European Patent Office
Prior art keywords
sole
stud
damping
heel region
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15821145.8A
Other languages
German (de)
French (fr)
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EP3232846A1 (en
Inventor
Cécile LECLAND
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAMART
Original Assignee
Damart
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Filing date
Publication date
Priority claimed from FR1462532A external-priority patent/FR3029750B1/en
Priority claimed from FR1462530A external-priority patent/FR3029749B1/en
Priority claimed from FR1462529A external-priority patent/FR3029748B1/en
Application filed by Damart filed Critical Damart
Publication of EP3232846A1 publication Critical patent/EP3232846A1/en
Application granted granted Critical
Publication of EP3232846B1 publication Critical patent/EP3232846B1/en
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    • 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, as well as a shoe equipped with this outer sole, this sole and this shoe being more particularly adapted to facilitate the walking of a person whose foot has undergone physiological and / or anatomical modifications. related to aging.
  • the fatty pile in the heel is a biological system allowing shock absorption 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 is detrimental in the impact of the heel with the ground by a shock wave propagating more quickly along the lower limb.
  • shoe outsole also commonly known as an outsole, suitable for running.
  • This outer sole has in its heel part and in its front part several housings, which each have an opening in a lower surface of the sole intended to be in contact with the ground, and several deformable hollow studs which are positioned partly in said housings , at the rate of at least one stud per housing, and which project from said lower surface.
  • Each deformable pad 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 inside the corresponding housing during contact of the pad with the ground.
  • each stud is designed so as to be able to deform upon impact with the ground by undergoing at least one vertical deformation and one horizontal deformation (cf. Fig. 2c ) which is accompanied by a horizontal shearing effect of the stud.
  • the shoe outsole described in the US patent application US 2013/0263469 can certainly be adapted for running, but on the other hand is not suitable for a foot which has been deformed by aging. More particularly, the deformation of the studs, with in particular a horizontal shearing effect, generates instability for the foot when walking. Consequently, the deformation of the studs makes this shoe sole unsuitable for walking for a person whose foot has undergone physiological and / or anatomical modifications linked to aging.
  • a first main objective of the invention is to propose a new outer sole for a shoe comprising in its heel part protruding damping pads and elastically deformable.
  • a more particular objective of the invention is to propose a new outer sole of a shoe comprising, in its heel part, protruding damping pads and elastically deformable, which facilitate stable walking, with effective shock absorption during l heel attack with the ground, said outer sole being more particularly suitable for feet whose greasy heap at the heel has stiffened over the years.
  • This new shoe outsole is more particularly, but not exclusively, suitable for a foot which has undergone physiological and / or anatomical modifications linked to aging.
  • the invention relates to an outer sole of a shoe, which in a manner known by the American patent US 5 3 67 791 , comprises in its heel part several housings, which each have an opening in a lower surface of the sole intended to be in contact with the ground, and several damping studs which are partly positioned in said housings, at the rate of at at least one damping pad per housing, and which, when they are not deformed, are partially projecting from said bottom surface, each damping pad being surrounded on all or part of its periphery by said bottom surface, and being elastically deformable so as to be able to be compressed at least partially inside the corresponding housing, each damping stud comprising, at the top of its projecting part, a contact surface with the ground.
  • this contact surface with the ground extends over its entire periphery and towards the inside of the stud by a surface concave curve, which is elastically deformable, and which allows the damping pad to be crushed with a reduction in the curvature of said concave curved surface.
  • the subject of the invention is also a shoe, in particular suitable for a person whose foot has undergone physiological and / or anatomical modifications linked to aging, and comprising an aforementioned outer sole.
  • the sole 1 can usually be broken down into three parts: a rear part 10, commonly known as heel part, a central part 12 corresponding to part supporting the arch of the foot, and a front part 11 corresponding to the forefoot.
  • This outer sole 1 is particularly suitable for facilitating the walking of a foot having undergone anatomical and physiological modifications linked to aging;
  • each damping pad 102 is a solid element, projecting from the lower face 102e of the layer of material C2 and passes through the corresponding housing 100 100, being partially projecting from said lower surface 101, and being surrounded on all or part of its periphery by said lower surface 101.
  • each damping block 102 is positioned inside the corresponding housing 100, and only a small part of the block 101 in the undeformed state is projecting with respect to said lower surface 101.
  • damping pads 102 are not identical, and in particular do not have the same dimension.
  • damping pads in the heel part 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 ( figure 4 ) perpendicular to the underside 101 of the sole, in particular during contact with pressure of the damping pad 102 on a rigid flat surface S such as hard ground.
  • each damping pad 102 is designed to be able to be elastically compressed at least partially inside the corresponding housing 100, without undergoing lateral shearing and without undergoing lateral displacement, that is to say without undergoing shearing and without undergoing displacement in a plane substantially parallel to the underside 101 of the sole. This advantageously provides cushioning without risk of instability for the foot when walking.
  • Each damping pad 102 comprises, at the top of its projecting part 102a, a contact surface with the ground 102b, which extends over its entire periphery and towards the inside of the pad by a concave curved surface 102c.
  • This concave curved surface 102c is elastically deformable, and allows, crushing of the pad 102 with a reduction in the curvature of said concave curved surface 102c under the effect of a compression force F ( figure 4 ) perpendicular to the underside 101 of the sole, in particular during contact with pressure of the damping pad 102 on a rigid flat surface S, such as hard ground.
  • each damping pad 102 resulting from the presence of this elastically deformable concave curved surface 102c allows, upon contact of the heel with the ground, to effectively absorb the shock, without creating instability in the area. heel piece, and thus effectively protects the heel area against impact when walking.
  • the damping pads 102 are designed so that said deformation of the concave curved surface 102c (crushing of the pad 102 with a reduction in the curvature of said surface) is obtained at least when the sole undergoes in static, with respect to a rigid flat horizontal surface S, vertical compression F (that is to say compression perpendicular to the underside 101 of the sole) over the entire surface of the sole under a load of at least 60Kg, and more particularly under a load between 60Kg and 180Kg.
  • the surface 102b of contact with the ground of a damping pad 102 extends over its entire periphery and towards the outside of stud 102 by a convex curved surface 102d ( Figures 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 around its central axis A.
  • the concave curved surface 102c forms a central bowl at the top of the pad 102 centered on this axis A.
  • Each damping pad can more particularly be produced by molding in an elastomeric material, and more particularly in a thermoplastic elastomeric material (TPE) having an appropriate hardness, and preferably in an expanded or unexpanded polyurethane thermoplastic elastomeric material (TPU). .
  • TPE thermoplastic elastomeric material
  • TPU expanded or unexpanded polyurethane thermoplastic elastomeric material
  • each cushioning stud 102 in the heel part 10 was made from a thermoplastic polyurethane elastomer (TPU) having a hardness of about 30 to 55 shore A, and preferably d '' about 30 to 35 shore A.
  • TPU thermoplastic polyurethane elastomer
  • the diameter D1 of each damping pad 102 in the non-deformed state was between 7mm and 12mm.
  • the maximum distance d between the contact surface 102b with the ground S and the underside 101 of the sole was less than 1mm, and more particularly substantially equal to 0.5mm.
  • the diameter D2 of the concave curved surface 102c in the non-deformed state ( figure 3 ) was about 4mm.
  • the space in the housing 100 around a damping pad 102 is large enough so that the part 102a of said damping pad, which projects from said bottom surface 101 before deformation of the pad, 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 fully compressed inside the corresponding housing 100.
  • 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 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 soleplate under a load of at least 60Kg, and preferably under a load 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 part 10 of the sole into an inner heel zone ZI and into a ZE outside heel area.
  • This arrangement makes it possible to contribute to a flat attack from the heel to the ground, which is better suited to the walking of a foot having undergone anatomical and / or physiological modifications linked to aging.
  • the maximum longitudinal distance L i , the maximum longitudinal distance L e , and lateral distance DL are measured from the barycenter of the corresponding stud, and therefore more particularly from the center of the corresponding stud when the latter has a central axis. of symmetry as illustrated in the particular variant of the appended figures.
  • the sole 1 also has in its front part 11 several front studs 112, which are elastically deformable, and which in the non-deformed state, protrude relative to the lower surface 111 of the front part 11 intended to be in contact with ground.
  • each front stud When walking, when the body weight is transferred to the front of the foot, each front stud compresses on contact with the ground ( Figure 6 ). Then when the weight on each compressed front stud 112 decreases due to the unwinding of the pitch, said front stud resumes its initial shape in an elastic manner, and thanks to its low residual deformation and to its convex shape exerts on the ground a force which favors the propulsion of the foot forward.
  • the front studs 112 thus have the function of promoting the propulsion of the foot forward when they resiliently return to their initial shape.
  • the top of the projecting part 112a of a front stud 112 in the non-deformed state, forms a surface 112b of contact of the stud with the ground which is convex.
  • the convex contact surface 112b of a front stud 112 is substantially spherical.
  • the projecting part 112a of a front stud 112 which protrudes relative to said lower surface 111 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 111.
  • the sole 1 comprises in its front part 11 several housings 110, which each have an opening 110a in the lower surface 111 of the sole intended to be in contact with the ground.
  • the front studs 112 are positioned in said housings, at the rate of at least one stud per housing.
  • Each front stud 112 is surrounded on all or part of its periphery by said lower surface 111, and is elastically deformable so as to be able to be compressed at least partially inside the corresponding housing 110 during contact of the front stud 112 with the soil S.
  • each front stud 112 is a solid element and / or is designed to be able to be compressed elastically at least partially inside the corresponding housing 110 without undergoing lateral shearing and without undergoing lateral displacement.
  • the front studs 112 are formed projecting from the lower face 102e of the layer of material C4, and the entire surface of each front stud 112, in the non-deformed state, is convex, and preferably substantially spherical.
  • the space in the housing 110 around a front stud 112 is large enough so that the projecting part 112a of said front stud 112, which protrudes relative to said lower surface 111 when the front stud 112 does not is not deformed, deforms elastically in contact with the ground without undergoing radial compression.
  • each front stud 112 is elastically deformable so as to be able to be fully compressed inside the corresponding housing 110.
  • the front studs 112 are more particularly, but not necessarily, designed so that they can be fully compressed inside the corresponding housing 110 when the sole undergoes static, relative to a horizontal surface, 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 112 can more particularly be produced by molding in an elastomeric material, and more particularly in a thermoplastic elastomeric material (TPE) having an appropriate hardness, and preferably in an expanded or unexpanded thermoplastic polyurethane elastomeric material (TPU).
  • TPE thermoplastic elastomeric material
  • TPU expanded or unexpanded thermoplastic polyurethane elastomeric material
  • each damping pad 112 in the front part 11 was made of expanded TPU and had a hardness between 50 to 70 shore A.
  • the maximum distance d between the contact surface 112b with the ground S and the underside 111 of the sole was less than 1mm, and more particularly substantially equal to 0.5mm.
  • the diameter D1 (largest dimension of the stud in a plane parallel to the lower face 111 of the sole) of a front stud 112 in the undeformed state was between 5mm and 10mm.
  • the sole 1 comprises ten front studs 112 which are identified more specifically respectively by the references 112A to 112J.
  • This sole 1 is adapted to serve as an outsole for a shoe with a round toe adapted to fit a standard foot P of length Lp less than the length of L of the sole 1, taking account of the upper 2 ( figure 1 ) shoe.
  • each sole is associated with a standard foot length L Lp.
  • L Lp standard foot length
  • a statistically average relationship has been established between the length L of an outer sole 1 and the length Lp of standard foot associated with it.
  • the limits represented by the fictitious 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 the rear part T of the heel of the foot P which is respectively 9%, 40% and 75% of the length foot Lp.
  • the longitudinal central axis M of the heel part 10 corresponds in practice to the longitudinal median of the sole at the level of the limit Lp (9%).
  • the intermediate metatarsophalangeal point C is the midpoint of the sole width at the Lp limit (75%).
  • the fictitious line segment [CO] (between the intermediate metatarsophalangeal point C and the point O on the external edge of the sole) is designated in the present text external metatarsophalangeal segment.
  • the point O is positioned on the external edge of the sole, so that this external metatarsophalangeal segment [CO] forms an angle of 62 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsophalangeal, 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 internal edge of the sole) is designated in the present text internal metatarsophalangeal segment.
  • the point Q is positioned on the internal edge of the sole, so that this internal metatarsophalangeal segment [CQ] forms an angle of 78 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsophalangeal, and which is parallel to the median longitudinal axis M of the heel part 10.
  • the metatarsophalangeal joint of the foot unites the head of the metatarsal bones at the base of the first phalanx of the toe.
  • the internal metatarsophalangeal 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 metatarsophalangeal segment [CO] corresponds in practice to a line segment metatarsophalangeal joints of the third toe 5, the fourth toe 6, and the fifth toe 7.
  • the points Q1 and Q2 divide the metatarsal phalangeal segment [CQ] into three equal parts.
  • the point Q1 is thus located with respect to the intermediate metatarsophalangeal point C at a distance equal to one third of the length of the internal metatarsophalangeal segment [CQ]
  • the point Q2 is thus located with respect to the intermediate metatarsophalangeal point C to a distance equal to two thirds of the length of the internal metatarsophalangeal segment [CQ].
  • Points 01, 02, and 03 divide the external metatarsophalangeal segment [CO] into four equal parts.
  • the point O1 is thus located with respect to the intermediate metatarsophalangeal point C at a distance equal to a quarter of the length of the external metatarsophalangeal segment [CO]; point 02 is located in relation to the intermediate metatarsophalangeal point C at a distance equal to half the length of the external metatarsophalangeal segment [CO]; point 03 is located in relation to the intermediate metatarsophalangeal point C at a distance equal to three quarters of the length of the external metatarsophalangeal segment [CO].
  • the front stud 112C is positioned along the said internal metatarsophalangeal segment [CQ] at the point Q1
  • the front stud 112E is positioned along the said internal metatarsophalangeal segment [CQ] at the point Q2.
  • the front stud 112A is positioned along said external metatarsophalangeal segment [CO] at the point O1.
  • the front stud 112G is positioned along the said external metatarsophalangeal segment [CO] at the point 02.
  • the front stud 112I is positioned along the said external metatarsophalangeal segment [CO] at the point 03.
  • the front stud 112C is positioned in the region of the metatarsophalangeal joint of the second toe 4; the front stud 112E is positioned in the region of the metatarsophalangeal joint of the big toe 3; the front stud 112A is positioned in the region of the metatarsophalangeal joint of the third toe 5; the front stud 112G is positioned in the region of the metatarsophalangeal joint of the fourth toe 6; the front stud 112I is positioned in the region of the metatarsophalangeal joint of the fifth toe 7.
  • the front stud 112B is positioned, in a direction substantially parallel to the median longitudinal axis M of the part 10, between the front end 11a of the sole and the front stud 112A, and at a distance DP from said first stud before 112A 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 front stud 112D relative to the front stud 112C, for the front stud 112F relative to the front stud 112E, for the front stud 112H relative to the front stud 112G, and for the front stud 112J relative to the stud before 112I.
  • the front studs 112B, 112D, 112F, 112H, 112J are positioned relative to the front studs 112A, 112C, 112E, 112G, 112I respectively, so that the front stud 112B is positioned in the region of the inter phalangeal joint of the third toe 5, the front stud 112D is positioned in the region of the inter phalangeal joint of the second toe 4, the front stud 112F is positioned in the region of the inter phalangeal joint of the big toe 3, that the front stud 112H is positioned in the region of the inter phalangeal joint of the fourth toe 6, and that the front stud 112J is positioned in the region of the inter phalangeal joint of the fifth toe 7.
  • the line which extends, 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, up to 'at the front end 11a of the sole, by the inclined axis M' passing through the intermediate point C, corresponds to the line of unwinding of the foot during walking.
  • the propulsion on the forefoot during the unrolling 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 little used.
  • the forefoot has undergone anatomical modifications linked to aging (hallux valgus, toes in claws or in hammers) the unrolling 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 grip is made more strongly on the second toe 4 and on the third toe 5.
  • the front studs 112A, 112B, 112C and 112D in the region of the second toe 4 and of the third toe 5 thus play an important role in facilitating the propulsion forward of the foot during the course of this type of foot.
  • the front studs 112E and 112F in the region of the big toe 3 also play an important role in facilitating the propulsion towards the front of the foot during the unrolling of this type of foot, because the grip on the big toe 3 is also important.
  • the pads before 112E and 112F in the region of the big toe 3 are advantageously larger than the pads before 112A, 112B, 112C and 112D in the region of the second toe 4 and the third toe 5, so that the thrust they exercise due to their elasticity and their low residual deformation.
  • the seventh front stud 112G and the eighth front stud 112H in the region of the fourth toe 6 are smaller than the front studs 112A, 112B, 112C and 112D in the region of the second toe 4 and the third toe 5.
  • the ninth front stud 112I and the tenth front stud 112J are smaller than the first 112A, second 112B, third 112C and fourth 112D front studs, and are also less big than the seventh front stud 112G and the eighth front stud 112H.
  • the sole 1 includes a stiffening insert 120 ( figure 2 ), also commonly called “shank”, which more particularly has the shape of a boomerang, which is positioned mainly in the outer zone of the central part 12.
  • This insert 120 is for example a plastic part.
  • This insert 120 connects the heel part 10 to the front part 11, and makes it possible to support the arch of the foot, so as to reduce pronation and relieve the load on the front of the foot. It allows during the unrolling of the foot to support the arch by making the link between the heel part 10 (rear of the foot) and the front part 11 (front of the foot) of the sole.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Description

Domaine techniqueTechnical area

La présente invention concerne une semelle extérieure de chaussure, ainsi qu'une chaussure équipée de cette semelle extérieure, cette semelle et cette chaussure étant plus particulièrement adaptées pour faciliter la marche d'une personne dont le pied a subi des modifications physiologiques et/ou anatomiques liées au vieillissement.The present invention relates to an outer sole of a shoe, as well as a shoe equipped with this outer sole, this sole and this shoe being more particularly adapted to facilitate the walking of a person whose foot has undergone physiological and / or anatomical modifications. related to aging.

Art antérieurPrior art

Des études sur le vieillissement du pied ont montré que des modifications naturelles du pied se produisent avec l'âge:

  • l'amas graisseux au niveau du talon se rigidifie avec les années.
  • des déformations, de type hallux valgus, orteils en griffes ou en marteaux, apparaissent au niveau de l'avant pied.
  • la voûte plantaire, au niveau de la partie centrale du pied, s'affaisse entraînant une pronation du pied, ainsi qu'un élargissement du pied pouvant aboutir à un pied plat.
Studies on the aging of the foot have shown that natural changes in the foot occur with age:
  • the greasy pile at the heel stiffens over the years.
  • deformities, of the hallux valgus type, toes in claws or hammers, appear at the level of the forefoot.
  • the arch of the foot, at the level of the central part of the foot, collapses causing a pronation of the foot, as well as a widening of the foot which can lead to a flat foot.

L'amas graisseux au niveau du talon est un système biologique permettant une absorption des chocs lorsque le talon entre en contact avec le sol. La rigidification de cet amas graisseux au niveau du talon découle d'une diminution de collagène, d'une diminution de l'élasticité des fibres, ainsi que d'une diminution de la présence d'eau et de gras. Cette rigidification engendre une diminution de la capacité d'absorption naturelle du pied, ce qui de manière préjudiciable se traduit lors de l'impact du talon avec le sol par une onde de choc se propageant plus rapidement le long du membre inférieur.The fatty pile in the heel is a biological system allowing shock absorption 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 is detrimental in the impact of the heel with the ground by a shock wave propagating more quickly along the lower limb.

En outre, une analyse de la marche de personnes âgées a permis de mettre en évidence que les modifications avec les années de l'anatomie et de la physiologie du pied conduisaient à une pose du pied au sol (attaque talon/sol) plus à plat.In addition, an analysis of the walk of the elderly has made it possible to highlight that the changes with the years of the anatomy and physiology of the foot led to a pose of the foot on the ground (heel / ground attack) more flat .

Les déformations au niveau de l'avant du pied, de type hallux valgus, orteils en griffes provoquent une limitation des angles de flexion des orteils, augmentent les troubles de l'équilibre, et modifient le schéma (« pattern ») de marche, ce qui se traduit en pratique par un déroulé du pas plus limité et moins fluide et par une plus faible capacité de propulsion vers l'avant.Deformities in the forefoot, hallux valgus, claw toes cause limitation of the flexion angles, increase balance disorders, and modify the walking pattern (“pattern”), which translates in practice by a more limited and less fluid progress of the step and by a lower capacity of propulsion towards the front.

On a déjà proposé dans la demande de brevet américain US 2013/0263469 une semelle extérieure de chaussure, encore communément appelée semelle d'usure, adaptée pour la course à pied. Cette semelle extérieure comporte dans sa partie talonnière et dans sa partie avant plusieurs logements, qui présentent chacun une ouverture dans une surface inférieure de la semelle destinée à être en contact avec le sol, et plusieurs plots creux déformables qui sont positionnés en partie dans lesdits logements, à raison d'au moins un plot par logement, et qui sont en saillie par rapport à ladite surface inférieure. Chaque plot déformable est entouré sur tout ou partie de sa périphérie par ladite surface inférieure, et est déformable élastiquement de manière à pourvoir être comprimé au moins partiellement à l'intérieur du logement correspondant lors d'un contact du plot avec le sol. Dans cette semelle, chaque plot est conçu de manière à pouvoir se déformer lors de l'impact avec le sol en subissant au moins une déformation verticale et une déformation horizontale (cf. Fig. 2c) qui s'accompagne d'un effet de cisaillement horizontal du plot.We have already proposed in the American patent application US 2013/0263469 a shoe outsole, also commonly known as an outsole, suitable for running. This outer sole has in its heel part and in its front part several housings, which each have an opening in a lower surface of the sole intended to be in contact with the ground, and several deformable hollow studs which are positioned partly in said housings , at the rate of at least one stud per housing, and which project from said lower surface. Each deformable pad 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 inside the corresponding housing during contact of the pad with the ground. In this sole, each stud is designed so as to be able to deform upon impact with the ground by undergoing at least one vertical deformation and one horizontal deformation (cf. Fig. 2c ) which is accompanied by a horizontal shearing effect of the stud.

La semelle extérieure de chaussure décrite dans la demande de brevet américain US 2013/0263469 peut certes être adaptée pour la course à pied, mais en revanche n'est pas adaptée pour un pied qui a été déformé par le vieillissement. Plus particulièrement, la déformation des plots, avec notamment un effet de cisaillement horizontal, engendre une instabilité pour le pied lors de la marche. Par conséquent, la déformation des plots rend cette semelle de chaussure inadaptée pour la marche d'une personne dont le pied a subi des modifications physiologiques et/ou anatomiques liées au vieillissement.The shoe outsole described in the US patent application US 2013/0263469 can certainly be adapted for running, but on the other hand is not suitable for a foot which has been deformed by aging. More particularly, the deformation of the studs, with in particular a horizontal shearing effect, generates instability for the foot when walking. Consequently, the deformation of the studs makes this shoe sole unsuitable for walking for a person whose foot has undergone physiological and / or anatomical modifications linked to aging.

Le brevet américain US 5 367 791 divulgue (figures 8 à 14) une semelle extérieure de chaussure présentant les caractéristiques techniques du préambule de la revendication 1. Cette semelle comporte dans sa partie talonnière des plots d'amortissement en saillie qui sont en partie positionnés dans des logements, à raison d'un plot d'amortissement par logement. Chaque plots d'amortissement est déformable élastiquement en étant compressible verticalement de manière à s'élargir dans sa partie positionnée à l'intérieur dudit logement.The American patent US 5,367,791 discloses ( figures 8 to 14 ) an outer sole of the shoe having the technical characteristics of the preamble of claim 1. This sole has in its heel part projecting damping studs which are partly positioned in housings, at the rate of a damping stud by housing. Each damping pads is elastically deformable while being vertically compressible so as to widen in its part positioned inside said housing.

Résumé de l'inventionSummary of the invention

Un premier objectif principal de l'invention est de proposer une nouvelle semelle extérieure de chaussure comportant dans sa partie talonnière des plots d'amortissement en saillie et déformables élastiquement.A first main objective of the invention is to propose a new outer sole for a shoe comprising in its heel part protruding damping pads and elastically deformable.

Un objectif plus particulier de l'invention est de proposer une nouvelle semelle extérieure de chaussure comportant, dans sa partie talonnière, des plots d'amortissement en saillie et déformables élastiquement, qui facilitent une marche stable, avec un amortissement efficace des chocs lors de l'attaque du talon avec le sol, ladite semelle extérieure étant plus particulièrement adaptée pour des pieds dont l'amas graisseux au niveau du talon s'est rigidifié avec les années.A more particular objective of the invention is to propose a new outer sole of a shoe comprising, in its heel part, protruding damping pads and elastically deformable, which facilitate stable walking, with effective shock absorption during l heel attack with the ground, said outer sole being more particularly suitable for feet whose greasy heap at the heel has stiffened over the years.

Cette nouvelle semelle extérieure de chaussure est plus particulièrement, mais pas exclusivement, adaptée pour un pied ayant subi des modifications physiologiques et/ou anatomiques liées au vieillissement.This new shoe outsole is more particularly, but not exclusively, suitable for a foot which has undergone physiological and / or anatomical modifications linked to aging.

Ainsi, l'invention a pour objet une semelle extérieure de chaussure, qui de manière connue par le brevet américain US 5 3 67 791 , comporte dans sa partie talonnière plusieurs logements, qui présentent chacun une ouverture dans une surface inférieure de la semelle destinée à être en contact avec le sol, et plusieurs plots d'amortissement qui sont en partie positionnés dans lesdits logements, à raison d'au moins un plot d'amortissement par logement, et qui, lorsqu'ils ne sont pas déformés, sont partiellement en saillie par rapport à ladite surface inférieure, chaque plot d'amortissement étant entouré sur tout ou partie de sa périphérie par ladite surface inférieure, et étant déformable élastiquement de manière à pourvoir être comprimé au moins partiellement à l'intérieur du logement correspondant, chaque plot d'amortissement comportant, au sommet de sa partie en saillie, une surface de contact avec le sol.Thus, the invention relates to an outer sole of a shoe, which in a manner known by the American patent US 5 3 67 791 , comprises in its heel part several housings, which each have an opening in a lower surface of the sole intended to be in contact with the ground, and several damping studs which are partly positioned in said housings, at the rate of at at least one damping pad per housing, and which, when they are not deformed, are partially projecting from said bottom surface, each damping pad being surrounded on all or part of its periphery by said bottom surface, and being elastically deformable so as to be able to be compressed at least partially inside the corresponding housing, each damping stud comprising, at the top of its projecting part, a contact surface with the ground.

De manière caractéristique selon l'invention, cette surface de contact avec le sol se prolonge sur toute sa périphérie et vers l'intérieur du plot par une surface courbe concave, qui est déformable élastiquement, et qui permet un écrasement du plot d'amortissement avec une diminution de la courbure de ladite surface courbe concave.Characteristically according to the invention, this contact surface with the ground extends over its entire periphery and towards the inside of the stud by a surface concave curve, which is elastically deformable, and which allows the damping pad to be crushed with a reduction in the curvature of said concave curved surface.

L'invention a également pour objet une chaussure, notamment adaptée pour une personne dont le pied a subi des modifications physiologiques et/ou anatomiques liées au vieillissement, et comportant une semelle d'usure extérieure susvisée.The subject of the invention is also a shoe, in particular suitable for a person whose foot has undergone physiological and / or anatomical modifications linked to aging, and comprising an aforementioned outer sole.

Brève description des figuresBrief description of the figures

Les caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description détaillée ci-après d'une variante particulière de réalisation de l'invention, laquelle variante particulière de réalisation est décrite à titre d'exemple non limitatif et non exhaustif de l'invention, et en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue de côté d'un exemple de chaussure pourvue d'une semelle extérieure,
  • la figure 2 est une vue de dessous d'une variante particulière de réalisation d'une semelle extérieure conforme à l'invention.
  • La figure 3 est une vue en coupe transversale de la partie talonnière, de la semelle extérieure de la figure 2, au niveau d'un plot d'amortissement arrière et dans le plan de coupe III-III de la figure 2, le plot d'amortissement arrière étant à l'état non déformé.
  • La figure 4 est une vue en coupe transversale du plot d'amortissement arrière de la figure 3 et de son logement, lorsque le plot d'amortissement arrière est déformé lors d'un contact avec le sol.
  • La figure 5 est une vue en coupe transversale de la partie avant, de la semelle extérieure de la figure 2, au niveau d'un plot avant et dans le plan de coupe V-Vde la figure 2, le plot avant étant à l'état non déformé.
  • La figure 6 est une vue en coupe transversale du plot avant de la figure 5 et de son logement, lorsque le plot avant est déformé lors d'un contact avec le sol.
  • la figure 7 est une vue de dessus de la semelle extérieure de la semelle de la figure 2 et d'un pied positionné par rapport à ladite semelle.
  • La figure 8 est une vue de dessus de la semelle extérieure de la semelle de la figure 2 sur laquelle sont représentés les segments métatarso phalangiens externe et interne.
The characteristics 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 variant embodiment is described by way of non-limiting and non-exhaustive example of the invention, and with reference to the accompanying drawings in which:
  • the figure 1 is a side view of an example of a shoe provided with an outer sole,
  • the figure 2 is a bottom view of a particular variant embodiment of an outer sole according to the invention.
  • The figure 3 is a cross-sectional view of the heel portion, of the outsole of the figure 2 , at a rear damping pad and in the section plane III-III of the figure 2 , the rear damping pad being in the undeformed state.
  • The figure 4 is a cross-sectional view of the rear damping pad of the figure 3 and its housing, when the rear damping pad is deformed upon contact with the ground.
  • The figure 5 is a cross-sectional view of the front part of the outer sole of the figure 2 , at a front stud and in the cutting plane V-V of the figure 2 , the front stud being in the non-deformed state.
  • The figure 6 is a cross-sectional view of the front stud of the figure 5 and its housing, when the front stud is deformed during contact with the ground.
  • the figure 7 is a top view of the outsole of the sole of the figure 2 and a foot positioned relative to said sole.
  • The figure 8 is a top view of the outsole of the sole of the figure 2 on which the external and internal metatarsophalangeal segments are represented.

Description détailléedetailed description

On a représenté sur la figure 1 un exemple de chaussure pourvue d'une semelle extérieure 1, encore appelée semelle d'usure. En référence à la figure 2, qui représente en vue de dessous une variante particulière de semelle extérieure 1 conforme à l'invention, la semelle 1 peut de manière usuelle se décomposer en trois parties : une partie arrière 10, communément désignée partie talonnière, une partie centrale 12 correspondant à partie de soutien de la voûte plantaire du pied, et une partie avant 11 correspondant à l'avant pied.We have represented on the figure 1 an example of a shoe provided with an outer sole 1, also called an outsole. With reference to the figure 2 , which represents a view from below of a particular variant of outer sole 1 according to the invention, the sole 1 can usually be broken down into three parts: a rear part 10, commonly known as heel part, a central part 12 corresponding to part supporting the arch of the foot, and a front part 11 corresponding to the forefoot.

Cette semelle extérieure 1 est particulièrement adaptée pour faciliter la marche d'un pied ayant subi des modifications anatomiques et physiologiques liées au vieillissement;This outer sole 1 is particularly suitable for facilitating the walking of a foot having undergone anatomical and physiological modifications linked to aging;

Partie talonnière 10Heel section 10

En référence aux figures 2 et 3, la semelle extérieure 1 comporte dans sa partie talonnière 10 :

  • une première couche de matériau C1 comportant plusieurs logements 100 traversants, qui présentent chacun une ouverture 100a dans une surface inférieure 101 de la première couche de matériau C1 ; cette surface inférieure 101 de la couche de matériau C1 forme la surface inférieure de la semelle destinée à être en contact avec le sol S, et
  • une deuxième couche de matériau C2, qui est positionnée au-dessus de la première couche C1, et dans laquelle sont formés plusieurs plots d'amortissement 102, par exemple par moulage ; ces plots d'amortissement 102 sont déformables élastiquement, et sont positionnés dans lesdits logements 100, à raison d'au moins un plot 102 par logement 100.
With reference to figures 2 and 3 , the outer sole 1 comprises in its heel part 10:
  • a first layer of material C1 comprising several through housings 100, which each have an opening 100a in a lower surface 101 of the first layer of material C1; this lower surface 101 of the layer of material C1 forms the lower surface of the sole 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 pad 102 per housing 100.

En référence à la figure 2, à l'état non déformé, chaque plot d'amortissement 102 est un élément plein, formé en saillie par rapport à la face inférieure 102e de la couche de matériau C2 et passe à travers le logement 100 correspondant 100, en étant partiellement en saillie par rapport à ladite surface inférieure 101, et en étant entouré sur tout ou partie de sa périphérie par ladite surface inférieure 101.With reference to the figure 2 , in the undeformed state, each damping pad 102 is a solid element, projecting from the lower face 102e of the layer of material C2 and passes through the corresponding housing 100 100, being partially projecting from said lower surface 101, and being surrounded on all or part of its periphery by said lower surface 101.

De préférence, la majeure partie de chaque plot d'amortissement 102 est positionnée à l'intérieur du logement 100 correspondant, et seule une faible partie du plot 101 à l'état non déformé est en saillie par rapport à ladite surface inférieure 101.Preferably, the major part of each damping block 102 is positioned inside the corresponding housing 100, and only a small part of the block 101 in the undeformed state is projecting with respect to said lower surface 101.

Dans la variante particulière de la figure 2, tous les plots d'amortissement 102 ne sont pas identiques, et notamment n'ont pas la même dimension. Dans une autre variante, les plots d'amortissements dans la partie talonnière 10 pourraient être identiques et avoir la même dimension.In the particular variant of the figure 2 , all of the damping pads 102 are not identical, and in particular do not have the same dimension. In another variant, the damping pads in the heel part 10 could be identical and have the same dimension.

En référence à la figure 4, chaque plot d'amortissement 102 est déformable élastiquement de manière à pourvoir être comprimé au moins partiellement à l'intérieur du logement 100 correspondant sous l'effet d'une force de compression F (figure 4) perpendiculaire à la face inférieure 101 de la semelle, en particulier lors d'un contact avec pression du plot d'amortissement 102 sur une surface plane rigide S telle qu'un sol dur.With reference to the figure 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 ( figure 4 ) perpendicular to the underside 101 of the sole, in particular during contact with pressure of the damping pad 102 on a rigid flat surface S such as hard ground.

Plus particulièrement, en référence aux figures 3 et 4, et à la différence des plots déformables de la demande de demande américain US 2013/0263469 , chaque plot d'amortissement 102 est conçu pour pouvoir être comprimé élastiquement au moins partiellement à l'intérieur du logement 100 correspondant, sans subir de cisaillement latéral et sans subir de déplacement latéral, c'est à dire sans subir de cisaillement et sans subir de déplacement dans un plan sensiblement parallèle à la face inférieure 101 de la semelle. On obtient ainsi avantageusement un amortissement sans risque d'instabilité pour le pied lors de la marche.More specifically, with reference to figures 3 and 4 , and unlike the deformable plots of the American demand demand US 2013/0263469 , each damping pad 102 is designed to be able to be elastically compressed at least partially inside the corresponding housing 100, without undergoing lateral shearing and without undergoing lateral displacement, that is to say without undergoing shearing and without undergoing displacement in a plane substantially parallel to the underside 101 of the sole. This advantageously provides cushioning without risk of instability for the foot when walking.

Chaque plot d'amortissement 102 comporte, au sommet de sa partie en saillie 102a, une surface de contact avec le sol 102b, qui se prolonge sur toute sa périphérie et vers l'intérieur du plot par une surface courbe concave 102c. Cette surface courbe concave 102c est déformable élastiquement, et permet, un écrasement du plot 102 avec une diminution de la courbure de ladite surface courbe concave 102c sous l'effet d'une force de compression F (figure 4) perpendiculaire à la face inférieure 101 de la semelle, en particulier lors d'un contact avec pression du plot d'amortissement 102 sur une surface plane rigide S, telle qu'un sol dur.Each damping pad 102 comprises, at the top of its projecting part 102a, a contact surface with the ground 102b, which extends over its entire periphery and towards the inside of the pad by a concave curved surface 102c. This concave curved surface 102c is elastically deformable, and allows, crushing of the pad 102 with a reduction in the curvature of said concave curved surface 102c under the effect of a compression force F ( figure 4 ) perpendicular to the underside 101 of the sole, in particular during contact with pressure of the damping pad 102 on a rigid flat surface S, such as hard ground.

Cette déformation spécifique de chaque plot d'amortissement 102 découlant de la présence de cette surface courbe concave 102c déformable élastiquement permet lors d'un contact du talon avec le sol d'absorber efficacement le choc, sans créer d'instabilité au niveau de la zone talonnière, et permet ainsi de protéger efficacement la zone talonnière contre les chocs lors de la marche.This specific deformation of each damping pad 102 resulting from the presence of this elastically deformable concave curved surface 102c allows, upon contact of the heel with the ground, to effectively absorb the shock, without creating instability in the area. heel piece, and thus effectively protects the heel area against impact when walking.

Plus particulièrement, mais non nécessairement, les plots d'amortissement 102 sont conçus de telle sorte que ladite déformation de la surface courbe concave 102c (écrasement du plot 102 avec une diminution de la courbure de ladite surface) est obtenue au moins lorsque la semelle subit en statique, par rapport à une surface horizontale plane rigide S, une compression verticale F (c'est-à-dire une compression perpendiculaire à la face inférieure 101 de la semelle) sur toute la surface de la semelle sous une charge au moins de 60Kg, et plus particulièrement sous une charge comprise entre 60Kg et 180Kg.More particularly, but not necessarily, the damping pads 102 are designed so that said deformation of the concave curved surface 102c (crushing of the pad 102 with a reduction in the curvature of said surface) is obtained at least when the sole undergoes in static, with respect to a rigid flat horizontal surface S, vertical compression F (that is to say compression perpendicular to the underside 101 of the sole) over the entire surface of the sole under a load of at least 60Kg, and more particularly under a load between 60Kg and 180Kg.

De préférence, afin d'améliorer l'absorption des chocs et faciliter la compression de chaque plot d'amortissement 102 et son écrasement avec une diminution de la courbure de ladite surface courbe concave 102c, la surface 102b de contact avec le sol d'un plot d'amortissement 102 se prolonge sur toute sa périphérie et vers l'extérieur du plot 102 par une surface courbe convexe 102d (Figures 3 et 4).Preferably, in order to improve shock absorption and facilitate the compression of each damping pad 102 and its crushing with a reduction 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 towards the outside of stud 102 by a convex curved surface 102d ( Figures 3 and 4 ).

Plus particulièrement cette surface courbe convexe 102d d'un plot d'amortissement relie la face inférieure 102 de ladite couche de matériau C2 à la surface 102b de contact avec le sol du plot d'amortissement.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.

Plus particulièrement, au moins la partie 102a en saillie d'un plot d'amortissement à l'état non déformé, qui est en saillie par rapport à ladite surface inférieure 10, forme un solide de révolution ayant un axe central A de symétrie sensiblement perpendiculaire à ladite surface inférieure 101 (figures 1 et 3). Chaque plot d'amortissement 102 peut ainsi se déformer de manière symétrique autour de son axe central A.More particularly, at least the protruding part 102a of a damping pad in the undeformed state, which protrudes relative to said lower surface 10, forms a solid of revolution having a central axis A of symmetry substantially perpendicular to said lower surface 101 ( Figures 1 and 3 ). Each damping pad 102 can thus deform symmetrically around its central axis A.

Dans la variante particulière illustrée, la surface courbe concave 102c forme une cuvette centrale au sommet du plot 102 centrée sur cet axe A.In the particular variant illustrated, the concave curved surface 102c forms a central bowl at the top of the pad 102 centered on this axis A.

Chaque plot d'amortissement peut plus particulièrement être réalisé par moulage dans un matériau élastomère, et plus particulièrement dans un matériau élastomère thermoplastique (TPE) présentant une dureté appropriée, et de préférence dans un matériau élastomère thermoplastique de polyuréthane (TPU) expansé ou non expansé.Each damping pad can more particularly be produced by molding in an elastomeric material, and more particularly in a thermoplastic elastomeric material (TPE) having an appropriate hardness, and preferably in an expanded or unexpanded polyurethane thermoplastic elastomeric material (TPU). .

A titre d'exemple non limitatifs de l'invention, chaque plot d'amortissement 102 dans la partie talonnière 10 était réalisé dans un élastomère thermoplastique de polyuréthane (TPU) ayant une dureté d'environ 30 à 55 shore A, et de préférence d'environ 30 à 35 shore A. En référence à la figure 3, le diamètre D1 de chaque plot d'amortissement 102 à l'état non déformé (plus grande dimension du plot dans un plan parallèle à la face inférieure 101 de la semelle) était compris entre 7mm et 12mm. La distance maximale d entre la surface de contact 102b avec le sol S et la face inférieure 101 de la semelle était inférieure à 1mm, et plus particulièrement sensiblement égale à 0.5mm. Le diamètre D2 de la surface courbe concave 102c à l'état non déformé (figure 3) était d'environ 4mm.By way of nonlimiting example of the invention, each cushioning stud 102 in the heel part 10 was made from a thermoplastic polyurethane elastomer (TPU) having a hardness of about 30 to 55 shore A, and preferably d '' about 30 to 35 shore A. With reference to the figure 3 , the diameter D1 of each damping pad 102 in the non-deformed state (largest dimension of the pad in a plane parallel to the underside 101 of the sole) was between 7mm and 12mm. The maximum distance d between the contact surface 102b with the ground S and the underside 101 of the sole was less than 1mm, and more particularly substantially equal to 0.5mm. The diameter D2 of the concave curved surface 102c in the non-deformed state ( figure 3 ) was about 4mm.

Plus particulièrement, en référence à la figure 4, l'espace dans le logement 100 autour d'un plot d'amortissement 102 est suffisamment important pour que la partie 102a dudit plot d'amortissement, qui est en saillie par rapport à ladite surface inférieure 101 avant déformation du plot, est apte à se déformer élastiquement au contact du sol S sans subir de compression radiale.More specifically, with reference to the figure 4 , the space in the housing 100 around a damping pad 102 is large enough so that the part 102a of said damping pad, which projects from said bottom surface 101 before deformation of the pad, is able to deform elastically in contact with the ground S without undergoing radial compression.

Plus particulièrement, en référence à la figure 4, le plot d'amortissement 102 est déformable élastiquement de manière à pouvoir être comprimé totalement à l'intérieur du logement 100 correspondant.More specifically, with reference to the figure 4 , the damping pad 102 is elastically deformable so that it can be fully compressed inside the corresponding housing 100.

Plus particulièrement, mais non nécessairement, les plots d'amortissement 102 sont conçus en sorte de pouvoir être comprimés totalement à l'intérieur du logement 100 correspondant lorsque la semelle subit en statique, par rapport à une surface horizontale plane rigide S, une compression verticale F (c'est-à-dire une compression perpendiculaire à la face inférieure 101 de la semelle) sur toute la surface de la semelle sous une charge d'au moins 60Kg, et de préférence sous une charge comprise entre 60Kg et 180Kg.More particularly, but not necessarily, 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 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 soleplate under a load of at least 60Kg, and preferably under a load between 60Kg and 180Kg.

Plus particulièrement, en référence à la figure 2, le nombre de plots d'amortissement 102 est le même de part et d'autre d'un axe longitudinal médian M de la partie talonnière 10, qui divise latéralement la partie talonnière 10 de la semelle en une zone talonnière intérieure ZI et en une zone talonnière extérieure ZE. Cet agencement permet de contribuer à une attaque à plat du talon au sol, qui est mieux adaptée à la marche d'un pied ayant subi des modifications anatomiques et/ou physiologiques liées au vieillissement.More specifically, with reference to the figure 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 part 10 of the sole into an inner heel zone ZI and into a ZE outside heel area. This arrangement makes it possible to contribute to a flat attack from the heel to the ground, which is better suited to the walking of a foot having undergone anatomical and / or physiological modifications linked to aging.

Plus particulièrement, les plots d'amortissement 102 sont positionnés dans la zone intérieure ZI et dans la zone extérieure ZE de manière à améliorer l'attaque à plat et à améliorer le déroulé du pied. Ils présentent à cet effet l'une ou l'autre et/ou l'autre des caractéristiques techniques de positionnement suivantes :

  1. (a) le plot d'amortissement référencé 102-I est le plot d'amortissement, qui est situé dans la zone talonnière intérieure ZI, et qui est, dans la direction de l'axe longitudinal médian M, est le plus éloigné de la partie arrière 10a de la zone talonnière 10. Le plot d'amortissement référencé 102-E est le plot d'amortissement, qui est situé dans la zone talonnière extérieure ZE, et qui est, dans la direction de l'axe longitudinal médian M, le plus éloigné de la partie arrière 10a de la zone talonnière 10. La distance longitudinale maximale Li, mesurée longitudinalement suivant l'axe longitudinal médian M, entre ledit plot 102-I le plus éloigné et la partie arrière 10a de la zone talonnière 10 est inférieure à la distance longitudinale maximale Le mesurée longitudinalement suivant l'axe longitudinal médian M, entre ledit plot 102-E le plus éloigné et la partie arrière 10a de la zone talonnière 10.
  2. (b) les plots d'amortissement 102, situés dans la zone talonnière extérieure ZE, sont répartis de telle sorte que plus le plot d'amortissement 102 est éloigné de la partie arrière 10a de la zone talonnière 10, plus la distance latérale DL séparant ce plot d'amortissement 102 dudit axe longitudinal médian M est importante.
  3. (c) ladite distance longitudinale maximale Li, est inférieure à 20% de la longueur totale L de la semelle, et de préférence inférieure à 17% de la longueur totale L de la semelle.
  4. (d) ladite distance longitudinale maximale Le, est comprise entre 12% et 35% de la longueur totale L de la semelle, et de préférence entre 15% et 30% de la longueur totale L de la semelle.
  5. (e) les plots d'amortissement, 102 situés dans la zone talonnière extérieure ZE, sont répartis de telle sorte que la ligne LC passant par les barycentres de ces plots d'amortissement 102 est une ligne courbe dont la concavité est orientée vers ledit axe longitudinal médian M.
More particularly, the damping pads 102 are positioned in the internal zone ZI and in the external zone ZE so as to improve the flat attack and improve the unwinding of the foot. To this end, they have one or the other and / or the other of the following technical positioning characteristics:
  1. (a) the cushioning pad referenced 102-I is the cushioning pad, which is located in the interior heel zone ZI, and which is, in the direction of the median longitudinal axis M, is the farthest from the rear part 10a of the heel area 10. The cushioning pad referenced 102-E is the cushioning pad, which is located in the outer heel area ZE, and which is, in the direction of the median longitudinal axis M, the farthest from the rear part 10a of the heel area 10. The maximum longitudinal distance Li, measured longitudinally along the median longitudinal axis M, between said most distant stud 102-I and the rear part 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 most distant stud 102-E and the rear part 10a of the heel area 10.
  2. (b) the cushioning pads 102, located in the outer heel area ZE, are distributed so that the more the pad damping 102 is distant from the rear part 10a of the heel area 10, the greater the lateral distance DL separating this damping pad 102 from said median longitudinal axis M.
  3. (c) said maximum longitudinal distance L i 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.
  4. (d) said maximum longitudinal 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.
  5. (e) the damping pads 102 located in the outer heel area ZE are distributed such that the line LC passing through the barycenters of these damping pads 102 is a curved line whose concavity is oriented towards said axis longitudinal median M.

La distance longitudinale maximale Li, la distance longitudinale maximale Le, et distance latérale DL sont mesurées à partir du barycentre du plot correspondant, et de ce fait plus particulièrement à partir du centre du plot correspondant lors que celui-ci présente un axe central de symétrie tel qu'illustré dans la variante particulière des figures annexées.The maximum longitudinal distance L i , the maximum longitudinal distance L e , and lateral distance DL are measured from the barycenter of the corresponding stud, and therefore more particularly from the center of the corresponding stud when the latter has a central axis. of symmetry as illustrated in the particular variant of the appended figures.

Partie avant 11Front section 11

La semelle 1 comporte également dans sa partie avant 11 plusieurs plots avant 112, qui sont élastiquement déformables, et qui à l'état non déformé, sont en saillie par rapport à la surface inférieure 111 de la partie avant 11 destinée à être en contact avec le sol.The sole 1 also has in its front part 11 several front studs 112, which are elastically deformable, and which in the non-deformed state, protrude relative to the lower surface 111 of the front part 11 intended to be in contact with ground.

Plus particulièrement la semelle extérieure 1 comporte dans sa partie avant 11 :

  • une première couche de matériau C3 comportant plusieurs logements 110 traversants, qui présentent chacun une ouverture 110a dans une surface inférieure 111 de la première couche de matériau C3 ; cette surface inférieure 111 de la couche de matériau C3 forme la surface inférieure de la semelle destinée à être en contact avec le sol S au niveau de la partie avant de la semelle, et
  • une deuxième couche de matériau C4, qui est positionnée au-dessus de la première couche C3, et dans laquelle sont formés plusieurs plots avant 112, par exemple par moulage ; ces plots avant 112 sont déformables élastiquement, et sont positionnés dans lesdits logements 110, à raison d'au moins un plot 112 par logement 100.
More particularly, the outer sole 1 comprises in its front part 11:
  • a first layer of material C3 comprising several through housings 110, which each have an opening 110a in a lower surface 111 of the first layer of material C3; this lower surface 111 of the layer of material C3 forms the lower surface of the sole 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 studs 112 are formed, for example by molding; these front studs 112 are elastically deformable, and are positioned in said housings 110, at the rate of at least one stud 112 per housing 100.

Lors de la marche, lorsque le poids du corps est reporté sur l'avant du pied, chaque plot avant se comprime au contact du sol (Figure 6). Puis lorsque le poids sur chaque plot avant comprimé 112 diminue du fait du déroulé du pas, ledit plot avant, reprend de manière élastique sa forme initiale, et grâce à sa faible déformation rémanente et à sa forme convexe exerce sur le sol une force qui favorise la propulsion du pied vers l'avant. Les plots avant 112 ont ainsi pour fonction de favoriser la propulsion du pied vers l'avant lorsqu'ils reprennent de manière élastique leur forme initiale.When walking, when the body weight is transferred to the front of the foot, each front stud compresses on contact with the ground ( Figure 6 ). Then when the weight on each compressed front stud 112 decreases due to the unwinding of the pitch, said front stud resumes its initial shape in an elastic manner, and thanks to its low residual deformation and to its convex shape exerts on the ground a force which favors the propulsion of the foot forward. The front studs 112 thus have the function of promoting the propulsion of the foot forward when they resiliently return to their initial shape.

Plus particulièrement, en référence à la figure 5, le sommet de la partie en saillie 112a d'un plot avant 112, à l'état non déformé, forme une surface 112b de contact du plot avec le sol qui est convexe.More specifically, with reference to the figure 5 , the top of the projecting part 112a of a front stud 112, in the non-deformed state, forms a surface 112b of contact of the stud with the ground which is convex.

Plus particulièrement la surface de contact convexe 112b d'un plot avant 112 est sensiblement sphérique.More particularly, the convex contact surface 112b of a front stud 112 is substantially spherical.

Plus particulièrement la partie en saillie 112a d'un plot avant 112, qui est en saillie par rapport à ladite surface inférieure 111 lorsque le plot avant n'est pas déformé, forme un solide de révolution ayant un axe central de symétrie A sensiblement perpendiculaire à ladite surface inférieure 111.More particularly, the projecting part 112a of a front stud 112, which protrudes relative to said lower surface 111 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 111.

Plus particulièrement la semelle 1 comporte dans sa partie avant 11 plusieurs logements 110, qui présentent chacun une ouverture 110a dans la surface inférieure 111 de la semelle destinée à être en contact avec le sol. Les plots avant 112 sont positionnés dans lesdits logements, à raison d'au moins un plot par logement. Chaque plot avant 112 est entouré sur tout ou partie de sa périphérie par ladite surface inférieure 111, et est élastiquement déformable de manière à pourvoir être comprimé au moins partiellement à l'intérieur du logement 110 correspondant lors d'un contact du plot avant 112 avec le sol S.More particularly, the sole 1 comprises in its front part 11 several housings 110, which each have an opening 110a in the lower surface 111 of the sole intended to be in contact with the ground. The front studs 112 are positioned in said housings, at the rate of at least one stud per housing. Each front stud 112 is surrounded on all or part of its periphery by said lower surface 111, and is elastically deformable so as to be able to be compressed at least partially inside the corresponding housing 110 during contact of the front stud 112 with the soil S.

Plus particulièrement chaque plot avant 112 est un élément plein et/ou est conçu pour pouvoir être comprimé élastiquement au moins partiellement à l'intérieur du logement 110 correspondant sans subir de cisaillement latéral et sans subir de déplacement latéral.More particularly, each front stud 112 is a solid element and / or is designed to be able to be compressed elastically at least partially inside the corresponding housing 110 without undergoing lateral shearing and without undergoing lateral displacement.

Plus particulièrement, les plots avant 112 sont formés en saillie par rapport à la face inférieure 102e de la couche de matériau C4, et toute la surface de chaque plot avant 112, à l'état non déformé est convexe, et de préférence sensiblement sphérique.More particularly, the front studs 112 are formed projecting from the lower face 102e of the layer of material C4, and the entire surface of each front stud 112, in the non-deformed state, is convex, and preferably substantially spherical.

Plus particulièrement, l'espace dans le logement 110 autour d'un plot avant 112 est suffisamment important pour que la partie en saillie 112a dudit plot avant 112, qui est en saillie par rapport à ladite surface inférieure 111 lorsque le plot avant 112 n'est pas déformé, se déforme élastiquement au contact du sol sans subir de compression radiale.More particularly, the space in the housing 110 around a front stud 112 is large enough so that the projecting part 112a of said front stud 112, which protrudes relative to said lower surface 111 when the front stud 112 does not is not deformed, deforms elastically in contact with the ground without undergoing radial compression.

Plus particulièrement, chaque plot avant 112 est élastiquement déformable de manière à pourvoir être comprimé totalement à l'intérieur du logement 110 correspondant. Les plots avant 112 sont plus particulièrement, mais pas nécessairement, conçus en sorte de pouvoir être comprimés totalement à l'intérieur du logement 110 correspondant lorsque la semelle subit en statique, par rapport à une surface horizontale, une compression verticale sur toute la surface de la semelle sous une charge d'au moins 60Kg, et plus particulièrement sous une charge comprise entre 60Kg et 180Kg .More particularly, each front stud 112 is elastically deformable so as to be able to be fully compressed inside the corresponding housing 110. The front studs 112 are more particularly, but not necessarily, designed so that they can be fully compressed inside the corresponding housing 110 when the sole undergoes static, relative to a horizontal surface, 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.

Chaque plot avant 112 peut plus particulièrement être réalisé par moulage dans un matériau élastomère, et plus particulièrement dans un matériau élastomère thermoplastique (TPE) présentant une dureté appropriée, et de préférence dans un matériau élastomère thermoplastique de polyuréthane (TPU) expansé ou non expansé.Each front stud 112 can more particularly be produced by molding in an elastomeric material, and more particularly in a thermoplastic elastomeric material (TPE) having an appropriate hardness, and preferably in an expanded or unexpanded thermoplastic polyurethane elastomeric material (TPU).

A titre d'exemple non limitatifs de l'invention, chaque plot d'amortissement 112 dans la partie avant 11 était réalisé en TPU expansé et avait une dureté comprise entre 50 à 70 shore A. La distance maximale d entre la surface de contact 112b avec le sol S et la face inférieure 111 de la semelle était inférieure à 1mm, et plus particulièrement sensiblement égale à 0.5mm.By way of nonlimiting example of the invention, each damping pad 112 in the front part 11 was made of expanded TPU and had a hardness between 50 to 70 shore A. The maximum distance d between the contact surface 112b with the ground S and the underside 111 of the sole was less than 1mm, and more particularly substantially equal to 0.5mm.

En référence à la figure 5, le diamètre D1 (plus grande dimension du plot dans un plan parallèle à la face inférieure 111 de la semelle) d'un plot avant 112 à l'état non déformé était compris entre 5mm et 10mm.With reference to the figure 5 , the diameter D1 (largest dimension of the stud in a plane parallel to the lower face 111 of the sole) of a front stud 112 in the undeformed state was between 5mm and 10mm.

Positionnement des plots avantPositioning of the front studs

En référence à la figure 7, la semelle 1 comporte dix plots avant 112 qui sont identifiés de manière plus spécifique respectivement par les références 112A à 112J. Cette semelle 1 est adaptée pour servir de semelle extérieure à une chaussure à bout rond adaptée pour chausser un pied standard P de longueur Lp inférieure à la longueur de L de la semelle 1, compte tenu de la tige 2 (figure 1) de chaussure.With reference to the figure 7 , the sole 1 comprises ten front studs 112 which are identified more specifically respectively by the references 112A to 112J. This sole 1 is adapted to serve as an outsole for a shoe with a round toe adapted to fit a standard foot P of length Lp less than the length of L of the sole 1, taking account of the upper 2 ( figure 1 ) shoe.

Dans le domaine de la fabrication de chaussure, chaque semelle est associée à une longueur l Lp de pied standard. En fonction du type de chaussure (bout rond, bout carré, bout pointu, sandale ouverte,), il a été établi statistiquement une relation moyenne entre la longueur L d'une semelle extérieure 1 et la longueur Lp de pied standard qui lui est associée. Ces rapports connus sont fournis dans les tableaux ci- dessous.In the field of shoe manufacturing, each sole is associated with a standard foot length L Lp. Depending on the type of shoe (round toe, square toe, pointed toe, open sandal,) a statistically average relationship has been established between the length L of an outer sole 1 and the length Lp of standard foot associated with it. . These known reports are provided in the tables below.

Rapport L/Lp - Chaussure ou sandale fermée à l'avant et au talonL / Lp ratio - Closed shoe or sandal at the front and heel

Type de chaussureShoe type L/LpL / Lp Bout rondRound toe 1.041.04 Bout carréSquare toe 1.031.03 Bout pointuPointed toe 1.061.06

Relation L et Lp - Sandale ouverte au talon et/ou à l'avant (bout rond, carré ou pointu)Relation L and Lp - Sandal open at the heel and / or at the front (round, square or pointed toe)

Sandale ouverte au talon et ouverte à l'avantOpen heel sandal and open front L(cm)=Lp(cm)-0.66cmL (cm) = Lp (cm) -0.66cm Sandale fermée au talon et ouverte à l'avantClosed heel sandal and open front L(cm)=Lp(cm)-0.33cmL (cm) = Lp (cm) -0.33cm

Sur la figure 8, les limites représentées par les lignes fictives Lp(9%), Lp(40%) et Lp(75%) sont positionnées le long de l'axe longitudinal M de la partie talonnière 10 respectivement à une distance par rapport à la partie arrière T du talon du pied P qui est égale respectivement à 9%, 40% et 75% de la longueur de pied Lp. L'axe longitudinal médian M de la partie talonnière 10 correspond en pratique à la médiane longitudinale de la semelle au niveau de la limite Lp(9%).On the figure 8 , the limits represented by the fictitious 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 the rear part T of the heel of the foot P which is respectively 9%, 40% and 75% of the length foot Lp. The longitudinal central axis M of the heel part 10 corresponds in practice to the longitudinal median of the sole at the level of the limit Lp (9%).

Le point intermédiaire métatarso phalangien C est le point médian de la largeur de semelle au niveau de la limite Lp(75%).The intermediate metatarsophalangeal point C is the midpoint of the sole width at the Lp limit (75%).

Le segment de droite fictif [CO] (entre le point intermédiaire métatarso phalangien C et le point O sur le bord externe de la semelle) est désigné dans le présent texte segment métatarso phalangien externe. Le point O est positionné sur le bord externe de la semelle, de telle sorte que ce segment métatarso phalangien externe [CO] forme un angle de 62° avec l'axe longitudinal M", qui passe par le point intermédiaire C métatarso phalangien, et qui est parallèle l'axe longitudinal médian M de la partie talonnière 10.The fictitious line segment [CO] (between the intermediate metatarsophalangeal point C and the point O on the external edge of the sole) is designated in the present text external metatarsophalangeal segment. The point O is positioned on the external edge of the sole, so that this external metatarsophalangeal segment [CO] forms an angle of 62 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsophalangeal, and which is parallel to the median longitudinal axis M of the heel part 10.

Le segment de droite fictif [CQ] (entre le point intermédiaire C et le point Q sur le bord interne de la semelle) est désigné dans le présent texte segment métatarso phalangien interne. Le point Q est positionné sur le bord interne de la semelle, de telle sorte que ce segment métatarso phalangien interne [CQ] forme un angle de 78° avec l'axe longitudinal M", qui passe par le point intermédiaire C métatarso phalangien, et qui est parallèle l'axe longitudinal médian M de la partie talonnière 10.The fictitious line segment [CQ] (between the intermediate point C and the point Q on the internal edge of the sole) is designated in the present text internal metatarsophalangeal segment. The point Q is positioned on the internal edge of the sole, so that this internal metatarsophalangeal segment [CQ] forms an angle of 78 ° with the longitudinal axis M ", which passes through the intermediate point C metatarsophalangeal, and which is parallel to the median longitudinal axis M of the heel part 10.

En anatomie du pied, l'articulation métatarso phalangienne du pied unit la tête des os du métatarse à la base de la première phalange du doigt de pied. En référence à la figure 7, le segment métatarso phalangien interne [CQ] correspond en pratique à un segment de droite reliant les articulations métatarso phalangiennes du gros orteil 3 et du deuxième orteil 4. Le segment métatarso phalangien externe [CO] correspond en pratique à un segment de droite reliant les articulations métatarso phalangiennes du troisième orteil 5, du quatrième orteil 6, et du cinquième orteil 7.In foot anatomy, the metatarsophalangeal joint of the foot unites the head of the metatarsal bones at the base of the first phalanx of the toe. With reference to the figure 7 , the internal metatarsophalangeal 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 metatarsophalangeal segment [CO] corresponds in practice to a line segment metatarsophalangeal joints of the third toe 5, the fourth toe 6, and the fifth toe 7.

En référence à la figure 8 les points Q1 et Q2 divisent le segment métatarso phalangie interne [CQ] en trois parties égales. Le point Q1 est ainsi situé par rapport au point intermédiaire métatarso phalangien C à une distance égale à un tiers de la longueur du segment métatarso phalangien interne [CQ], et le point Q2 est ainsi situé par rapport au point intermédiaire métatarso phalangien C à une distance égale à deux tiers de la longueur du segment métatarso phalangien interne [CQ]. Les points 01, 02, et 03 divisent le segment métatarso phalangien externe [CO] en quatre parties égales. Le point O1 est ainsi situé par rapport au point intermédiaire métatarso phalangien C à une distance égale à un quart de la longueur du segment métatarso phalangien externe [CO] ; le point 02 est situé par rapport au point intermédiaire métatarso phalangien C à une distance égale à la moitié de la longueur du segment métatarso phalangien externe [CO] ; le point 03 est situé par rapport au point intermédiaire métatarso phalangien C à une distance égale à trois quart de la longueur du segment métatarso phalangien externe [CO].With reference to the figure 8 the points Q1 and Q2 divide the metatarsal phalangeal segment [CQ] into three equal parts. The point Q1 is thus located with respect to the intermediate metatarsophalangeal point C at a distance equal to one third of the length of the internal metatarsophalangeal segment [CQ], and the point Q2 is thus located with respect to the intermediate metatarsophalangeal point C to a distance equal to two thirds of the length of the internal metatarsophalangeal segment [CQ]. Points 01, 02, and 03 divide the external metatarsophalangeal segment [CO] into four equal parts. The point O1 is thus located with respect to the intermediate metatarsophalangeal point C at a distance equal to a quarter of the length of the external metatarsophalangeal segment [CO]; point 02 is located in relation to the intermediate metatarsophalangeal point C at a distance equal to half the length of the external metatarsophalangeal segment [CO]; point 03 is located in relation to the intermediate metatarsophalangeal point C at a distance equal to three quarters of the length of the external metatarsophalangeal segment [CO].

En référence à la figure 7, le plot avant 112C est positionné le long dudit segment métatarso phalangien interne [CQ] au niveau du point Q1, et le plot avant 112E est positionné le long dudit segment métatarso phalangien interne [CQ] au niveau du point Q2. Le plot avant 112A est positionné le long dudit segment métatarso phalangien externe [CO] au niveau du point O1. Le plot avant 112G est positionné le long dudit segment métatarso phalangien externe [CO] au niveau du point 02. Le plot avant 112I est positionné le long dudit segment métatarso phalangien externe [CO] au niveau du point 03. Les termes « positionné au niveau » signifient que le point correspondant (Q1, Q2, O1, O2, 03) est positionné à proximité ou à l'intérieur de la zone couverte par le plot avant correspondant (112C, 112E, 112A, 112G, 112I) sans que ce point correspondant (Q1, Q2, O1, O2, O3) ne soit nécessairement centré par rapport au plot avant qui lui est associé.With reference to the figure 7 , the front stud 112C is positioned along the said internal metatarsophalangeal segment [CQ] at the point Q1, and the front stud 112E is positioned along the said internal metatarsophalangeal segment [CQ] at the point Q2. The front stud 112A is positioned along said external metatarsophalangeal segment [CO] at the point O1. The front stud 112G is positioned along the said external metatarsophalangeal segment [CO] at the point 02. The front stud 112I is positioned along the said external metatarsophalangeal segment [CO] at the point 03. The terms “positioned at the level »Mean that the corresponding point (Q1, Q2, O1, O2, 03) is positioned near or inside the area covered by the corresponding front stud (112C, 112E, 112A, 112G, 112I) without this point corresponding (Q1, Q2, O1, O2, O3) is not necessarily centered with respect to the front stud associated with it.

Il en résulte en pratique que lorsque qu'un pied P est positionné dans une chaussure pourvue de cette semelle extérieure 1, le plot avant 112C est positionné dans la région de l'articulation métatarso phalangienne du deuxième orteil 4; le plot avant 112E est positionné dans la région de l'articulation métatarso phalangienne du gros orteil 3 ; le plot avant 112A est positionné dans la région de de l'articulation métatarso phalangienne du troisième orteil 5 ; le plot avant 112G est positionné dans la région de l'articulation métatarso phalangienne du quatrième orteil 6 ; le plot avant 112I est positionné dans la région de de l'articulation métatarso phalangienne du cinquième orteil 7.It follows in practice that when a foot P is positioned in a shoe provided with this outer sole 1, the front stud 112C is positioned in the region of the metatarsophalangeal joint of the second toe 4; the front stud 112E is positioned in the region of the metatarsophalangeal joint of the big toe 3; the front stud 112A is positioned in the region of the metatarsophalangeal joint of the third toe 5; the front stud 112G is positioned in the region of the metatarsophalangeal joint of the fourth toe 6; the front stud 112I is positioned in the region of the metatarsophalangeal joint of the fifth toe 7.

En référence à la figure 7, le plot avant 112B est positionné, dans une direction sensiblement parallèle à l'axe longitudinale médian M de la partie 10, entre l'extrémité avant 11a de la semelle et le plot avant 112A, et à une distance DP par rapport audit premier plot avant 112A plus particulièrement comprise entre 5% et 15% de cette longueur de pied, et de préférence entre 6% et 13% de la longueur de pied Lp associée à la semelle. Il en est de même pour plot avant 112D par rapport au plot avant 112C, pour le plot avant 112F par rapport au plot avant 112E, pour le plot avant 112H par rapport au plot avant 112G, et pour le plot avant 112J par rapport au plot avant 112I. Il en résulte ainsi que les plots avant 112B, 112D, 112F, 112H, 112J sont positionnés par rapport respectivement aux plots avant 112A, 112C, 112E, 112G, 112I de telle sorte que le plot avant 112B est positionné dans la région de l'articulation inter phalangienne du troisième orteil 5, que le plot avant 112D est positionné dans la région de l'articulation inter phalangienne du deuxième orteil 4, que le plot avant 112F est positionné dans la région de l'articulation inter phalangienne du gros orteil 3, que le plot avant 112H est positionné dans la région de l'articulation inter phalangienne du quatrième orteil 6, et que le plot avant 112J est positionné dans la région de l'articulation inter phalangienne du cinquième orteil 7.With reference to the figure 7 , the front stud 112B is positioned, in a direction substantially parallel to the median longitudinal axis M of the part 10, between the front end 11a of the sole and the front stud 112A, and at a distance DP from said first stud before 112A 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 front stud 112D relative to the front stud 112C, for the front stud 112F relative to the front stud 112E, for the front stud 112H relative to the front stud 112G, and for the front stud 112J relative to the stud before 112I. As a result, the front studs 112B, 112D, 112F, 112H, 112J are positioned relative to the front studs 112A, 112C, 112E, 112G, 112I respectively, so that the front stud 112B is positioned in the region of the inter phalangeal joint of the third toe 5, the front stud 112D is positioned in the region of the inter phalangeal joint of the second toe 4, the front stud 112F is positioned in the region of the inter phalangeal joint of the big toe 3, that the front stud 112H is positioned in the region of the inter phalangeal joint of the fourth toe 6, and that the front stud 112J is positioned in the region of the inter phalangeal joint of the fifth toe 7.

En référence à la figure 8, la ligne qui s'étend, suivant l'axe longitudinal médian M, depuis la partie arrière 10a de la partie talonnière 10 jusqu' au point central C' au niveau de la limite Lp(40%), et qui se prolonge, jusqu'à l'extrémité avant 11a de la semelle, par l'axe incliné M' passant par le point intermédiaire C, correspond à la ligne de déroulé du pied lors de la marche.With reference to the figure 8 , the line which extends, 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, up to 'at the front end 11a of the sole, by the inclined axis M' passing through the intermediate point C, corresponds to the line of unwinding of the foot during walking.

Lorsque l'avant pied n'a pas subi de modification anatomique liée au vieillissement, la propulsion sur l'avant du pied lors du déroulé du pied se fait séquentiellement dans une première phase essentiellement par appui sur le cinquième orteil 7 et sur le quatrième orteil 6, et dans une deuxième phase par appui sur le gros orteil 3. Le deuxième orteil 4 et le troisième orteil 5 sont ainsi relativement peu sollicités. En revanche, lorsque l'avant pied a subi des modifications anatomiques liées au vieillissement (hallux valgus, orteils en griffes ou en marteaux) le déroulé du pied est modifié, de telle sorte que l'appui sur le cinquième orteil 7 et sur le quatrième orteil 6 est plus faible, et que la prise d'appui se fait de manière plus importante sur le deuxième orteil 4 et sur le troisième orteil 5. Les plots avant 112A, 112B, 112C et 112D dans la région du deuxième orteil 4 et du troisième orteil 5 jouent ainsi un rôle important pour faciliter la propulsion vers l'avant du pied lors du déroulé de ce type de pied. Les plots avants 112E et 112F dans la région du gros orteil 3 jouent également un rôle important pour faciliter la propulsion vers l'avant du pied lors du déroulé de ce type de pied, car la prise d'appui sur le gros orteil 3 est également importante.When the forefoot has not undergone an anatomical modification linked to aging, the propulsion on the forefoot during the unrolling 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 little used. On the other hand, when the forefoot has undergone anatomical modifications linked to aging (hallux valgus, toes in claws or in hammers) the unrolling 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 grip is made more strongly on the second toe 4 and on the third toe 5. The front studs 112A, 112B, 112C and 112D in the region of the second toe 4 and of the third toe 5 thus play an important role in facilitating the propulsion forward of the foot during the course of this type of foot. The front studs 112E and 112F in the region of the big toe 3 also play an important role in facilitating the propulsion towards the front of the foot during the unrolling of this type of foot, because the grip on the big toe 3 is also important.

De préférence, tel qu'illustré sur la variante particulière de la figure 7, les plots avant 112E et 112F dans la région du gros orteil 3 sont avantageusement plus gros que les plots avant 112A, 112B, 112C et 112D dans la région du deuxième orteil 4 et du troisième orteil 5, de sorte que la poussée qu'ils exercent du fait de leur élasticité et de leur faible déformation rémanente. De même, le septième plot avant 112G et le huitième plot avant 112H dans la région du quatrième orteil 6 sont moins gros que les plots avant 112A, 112B, 112C et 112D dans la région du deuxième orteil 4 et du troisième orteil 5. Le neuvième plot avant 112I et le dixième plot avant 112J sont moins gros que les premier 112A, deuxième 112B, troisième 112C et quatrième 112D plots avant, et sont également moins gros que le septième plot avant 112G et le huitième plot avant 112H.Preferably, as illustrated on the particular variant of the figure 7 , the pads before 112E and 112F in the region of the big toe 3 are advantageously larger than the pads before 112A, 112B, 112C and 112D in the region of the second toe 4 and the third toe 5, so that the thrust they exercise due to their elasticity and their low residual deformation. Likewise, the seventh front stud 112G and the eighth front stud 112H in the region of the fourth toe 6 are smaller than the front studs 112A, 112B, 112C and 112D in the region of the second toe 4 and the third toe 5. The ninth front stud 112I and the tenth front stud 112J are smaller than the first 112A, second 112B, third 112C and fourth 112D front studs, and are also less big than the seventh front stud 112G and the eighth front stud 112H.

Partie centrale 12Central part 12

Dans la partie centrale 12, la semelle 1 comporte un insert de rigidification 120 (figure 2), encore communément appelé « shank », qui a plus particulièrement la forme d'un boomerang, qui est positionné principalement dans la zone extérieure de la partie centrale 12.In the central part 12, the sole 1 includes a stiffening insert 120 ( figure 2 ), also commonly called "shank", which more particularly has the shape of a boomerang, which is positioned mainly in the outer zone of the central part 12.

Cet insert 120 est par exemple une pièce en plastique.This insert 120 is for example a plastic part.

Cet insert 120 relie la partie talonnière 10 à la partie avant 11, et permet de soutenir la voûte plantaire, de manière à réduire la pronation et à soulager du chargement sur l'avant du pied. Il permet lors du déroulé du pied de soutenir la voûte plantaire en faisant le lien entre la partie talonnière 10 (arrière du pied) et la partie avant 11 (avant du pied) de la semelle.This insert 120 connects the heel part 10 to the front part 11, and makes it possible to support the arch of the foot, so as to reduce pronation and relieve the load on the front of the foot. It allows during the unrolling of the foot to support the arch by making the link between the heel part 10 (rear of the foot) and the front part 11 (front of the foot) of the sole.

Claims (18)

  1. Outer sole (1) of a shoe, comprising in its heel part (10) a plurality of housings (100), which each have an opening (100a) in a lower surface (101) of the sole intended to be in contact with the ground, and a plurality of damping studs (102) which are partially positioned in said housings (100), at the rate of at least one damping stud (102) per housing (100), and which, when they are not deformed, are partially projecting from said lower surface (101), each damping stud (102) being surrounded on all or part of its periphery by said lower surface (101), and being resiliently deformable so as to be able to be compressed at least partially inside the corresponding housing (100), each damping stud (102) comprising, at the top of its projecting part (12a), a surface (102b) in contact with the ground, characterized in that this surface (102b) in contact with the ground extends over its entire periphery and towards the inside of the stud (102) by a concave curved surface (102c), which is resiliently deformable, and which allows the damping stud (102) to be squashed with a decrease in the curvature of said concave curved surface (102c).
  2. Sole according to claim 1, wherein each damping stud (102) is designed to be able to be resiliently compressed at least partially inside the corresponding housing (100) without undergoing lateral shearing and without undergoing lateral displacement.
  3. Sole according to anyone of the preceding claims, wherein the surface (102b) of a damping stud (102) that is in contact with the ground extends over its entire periphery and towards the outside of the stud (102) by a convex curved surface (102d).
  4. Sole according to claim 3, comprising a layer of material (C2) in which the damping studs (102) are projecting from the lower face (102e) of said layer of material, and wherein said convex curved surface (102d) of a damping stud connects the lower face (102e) of said layer of material (C2) to the surface (102b) of the damping stud that is designed to be in contact with the ground.
  5. Sole according to any one of the preceding claims, wherein the major part of a damping stud (102), in the non-deformed state, is positioned inside the corresponding housing (100).
  6. Sole according to any one of the preceding claims, wherein each damping stud (102) is a solid element.
  7. Sole according to any one of the preceding claims, wherein the space in the housing (100) around a damping stud (102) is sufficiently large so that the part (102a) of said damping stud (102) that projects from said lower surface (101) before deformation of the stud is capable of resiliently deforming under the effect of a compressive force (F) perpendicular to the lower surface (101) of the sole, without undergoing radial compression.
  8. Sole according to any one of the preceding claims, wherein at least the projecting part (102a) of a damping stud (102) in the non-deformed state that projects from said lower surface (101) forms a solid of revolution having a central axis of symmetry (A) substantially perpendicular to said lower surface (101).
  9. Sole according to any one of the preceding claims, wherein each damping stud (102) is resiliently deformable so that it can be fully compressed inside the corresponding housing (100).
  10. Sole according to any one of the preceding claims, wherein the damping studs (102) are designed so that they can be fully compressed inside the corresponding housing (100) when the sole is subjected, when static, in relation to a rigid flat horizontal surface, to vertical compression over the entire surface of the sole under a load of at least 60 kg, and preferably under a load of between 60 kg and 180 kg.
  11. Sole according to any one of the preceding claims, wherein each damping stud (102) is designed such that the stud (102) is squashed with a reduction in the curvature of the concave curved surface (102c) at least when the sole is subjected, when static, in relation to a rigid flat horizontal surface S, to vertical compression over the entire surface of the sole under a load of at least 60 kg, and more particularly under a load of between 60 kg and 180 kg.
  12. Sole according to any one of the preceding claims, wherein the number of damping studs (102) is the same on either side of a median longitudinal axis (M) of the heel part (10).
  13. Sole according to any one of the preceding claims, wherein the heel part (10) is laterally divided by a median longitudinal axis (M) into an inner heel region (ZI) and an outer heel region (ZE), and wherein the maximum longitudinal distance (Li), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel region and the barycenter of the damping stud (102-1) which is located in the inner heel region (ZI), and which is, in the direction of the median longitudinal axis (M), the furthest from said rear part (10a) of the heel region, 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 and/or is less than the maximum longitudinal distance (Le), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel region (10) and the barycenter of the damping stud (102-E) which is located in the outer heel region (ZE), and which is, in the direction of the median longitudinal axis (M), the furthest from said rear part (10a) of the heel region (10).
  14. Sole according to any one of the preceding claims, wherein the heel part (10) is laterally divided by a median longitudinal axis (M) into an inner heel region (ZI) and an outer heel region (ZE), and wherein the maximum longitudinal distance (Le), measured longitudinally along the median longitudinal axis (M), between the rear part (10a) of the heel region (10) and the barycenter of the damping stud (102-E) which is located in the outer heel region (ZE), and which is, in the direction of the median longitudinal axis (M), the furthest from said rear part (10a) of the heel region (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.
  15. Sole according to any one of the preceding claims, wherein the heel part (10) is laterally divided by a median longitudinal axis (M) into an inner heel region (ZI) and an outer heel region (ZE), and wherein the damping studs (102), located in the outer heel region (ZE), are distributed such that the further the damping stud (102) from the rear part (10a) of the heel region, the greater the lateral distance (DL) separating the barycenter of this damping stud (102) from said median longitudinal axis (M), and/or are distributed so that the line (C) passing through the barycenter of these damping studs (102) is a curved line (LC), the concavity of which is oriented towards said median longitudinal axis (M).
  16. Sole according to any one of the preceding claims, wherein each damping stud (102) is made of an elastomer, more particularly a thermoplastic elastomer (TPE), and more particularly still a thermoplastic polyurethane elastomer (TPU), and/or wherein each damping stud (102) is made of a material having a hardness of approximately 30 to 55 Shore A, and more particularly 30 to 35 Shore A.
  17. Sole according to any one of the preceding claims, comprising in its front part (11) a plurality of front studs (112) which are resiliently deformable and which, in the non-deformed state, are at least partially projecting from a lower surface (111) of the front part (11) that is intended to be in contact with the ground, and preferably are capable of resuming their initial shape in a resilient manner in order to promote the propulsion of the foot forwards.
  18. Shoe, in particular adapted for a foot having undergone physiological and/or anatomical modifications linked to aging, and comprising an outer sole (1) according to any one of the preceding claims.
EP15821145.8A 2014-12-16 2015-12-16 Outer sole for footwear, comprising damping studs Active EP3232846B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1462532A FR3029750B1 (en) 2014-12-16 2014-12-16 OUTER SOLE SHOE COMPRISING IN THE TALONNIERE PART OF THE PROJECTED DAMPING PADS AND ELASTICALLY DEFORMABLE
FR1462530A FR3029749B1 (en) 2014-12-16 2014-12-16 OUTER SOLE SHOE COMPRISING IN THE FRONT PART OF THE PROJECTED AND ELASTICALLY DEFORMABLE PLOTS
FR1462529A FR3029748B1 (en) 2014-12-16 2014-12-16 OUTER SOLE SHOE COMPRISING IN THE TALONNIERE PART OF THE PROJECTED DAMPING PADS AND ELASTICALLY DEFORMABLE
PCT/FR2015/053549 WO2016097606A1 (en) 2014-12-16 2015-12-16 Outer sole for footwear, comprising damping studs

Publications (2)

Publication Number Publication Date
EP3232846A1 EP3232846A1 (en) 2017-10-25
EP3232846B1 true EP3232846B1 (en) 2020-06-17

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EP15821145.8A Active EP3232846B1 (en) 2014-12-16 2015-12-16 Outer sole for footwear, comprising damping studs

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CN (1) CN106998854B (en)
WO (1) WO2016097606A1 (en)

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Publication number Priority date Publication date Assignee Title
DE202017107867U1 (en) * 2017-12-22 2018-02-27 Caprice Schuhproduktion Gmbh & Co. Kg Outsole for a shoe
BR112021006395A2 (en) * 2018-10-05 2021-07-06 Worcester Polytech Inst Shock absorbing apparatus and method for mitigating harmful forces between a shoe sole and a ground surface

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US5367791A (en) * 1993-02-04 1994-11-29 Asahi, Inc. Shoe sole
DE102006025990A1 (en) * 2005-06-03 2006-12-14 Treksta Inc. Sole of shoe, comprises four layers with complementary projections and openings

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CH598778A5 (en) * 1976-12-22 1978-05-12 Bata Schuhe Ag
DE2659354C3 (en) * 1976-12-29 1979-11-15 Bata-Schuh-Ag, Moehlin, Aargau (Schweiz) Golf shoe sole
IT1275516B (en) * 1995-07-12 1997-08-07 Vibram Spa SPORTY SOLE WITH INCREASED STABILITY IN ONE PIECE
JP3831686B2 (en) * 2001-06-07 2006-10-11 美津濃株式会社 Sport shoe sole assembly
ES1056719Y (en) * 2004-01-23 2004-08-16 Cauchos Ruiz Alejos S A SOLE FOR FOOTWEAR.
ITPD20040140A1 (en) * 2004-05-28 2004-08-28 Pezzol Srl SOLE FOR FOOTWEAR
CH703926A1 (en) * 2010-10-07 2012-04-13 Glide N Lock Gmbh Outsole.
US9504293B2 (en) * 2011-04-18 2016-11-29 Nike, Inc. Outsole with extendable traction elements

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US5367791A (en) * 1993-02-04 1994-11-29 Asahi, Inc. Shoe sole
DE102006025990A1 (en) * 2005-06-03 2006-12-14 Treksta Inc. Sole of shoe, comprises four layers with complementary projections and openings

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WO2016097606A9 (en) 2016-07-28
CN106998854A (en) 2017-08-01
EP3232846A1 (en) 2017-10-25
CN106998854B (en) 2020-11-03
WO2016097606A1 (en) 2016-06-23

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