EP3721738B1 - Sport shoe - Google Patents

Sport shoe Download PDF

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Publication number
EP3721738B1
EP3721738B1 EP20020150.7A EP20020150A EP3721738B1 EP 3721738 B1 EP3721738 B1 EP 3721738B1 EP 20020150 A EP20020150 A EP 20020150A EP 3721738 B1 EP3721738 B1 EP 3721738B1
Authority
EP
European Patent Office
Prior art keywords
flexible panel
lateral
sports shoe
shoe
foot
Prior art date
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Active
Application number
EP20020150.7A
Other languages
German (de)
French (fr)
Other versions
EP3721738A1 (en
Inventor
Marylène Hanat
Nicolas Horvais
Anne Deroulede
Lauriane Dugit-Gros
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.)
Salomon SAS
Original Assignee
Salomon SAS
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Publication of EP3721738A1 publication Critical patent/EP3721738A1/en
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Publication of EP3721738B1 publication Critical patent/EP3721738B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/122—Soles with several layers of different materials characterised by the outsole or external layer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/1495—Footwear with health or hygienic arrangements with foot-supporting parts with arch-supports of the bracelet type
    • 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
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C1/00—Shoe lacing fastenings
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C7/00—Holding-devices for laces
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/28—Soles; Sole-and-heel integral units characterised by their attachment, also attachment of combined soles and heels

Definitions

  • the present invention relates to a walking or sports shoe.
  • the user When moving, walking or running, and more particularly on uneven terrain, as may be the case in the mountains, the user will seek the stability of his supports while maintaining a certain freedom of movement for more 'ease. This stability allows it to limit trauma and avoid injuries such as sprains or strains. To do this, he will wear shoes that provide good foot support.
  • Another type of construction consists of inserting a reinforcement provided with lateral and/or medial wings, between the shock-absorbing layer of an external sole and the upper. Foot support is good but the cushioning layer located under the reinforcement tends to add instability.
  • Another type of construction includes soft reinforcing strips surrounding the instep and extending up to the lacing system. The foot is thus well enclosed and relatively well maintained.
  • lateral support is not optimal. The risk of twisting the foot remains.
  • Another construction incorporates a rigid shell extending over mainly the entire length of the sole and including lateral and/or medial wings, going up towards the upper.
  • the side wings rise little on the upper and are not coupled to a flexible reinforcing strip associated with the lacing system.
  • the lateral support of the foot is relatively good.
  • the rigid shell provides stiffness, particularly for the movement of the foot, which penalizes the ease of movement of the foot.
  • EP 2 580 978 A1 discloses a sports shoe.
  • the aim of the invention is to provide an improved shoe.
  • One aim is in particular to offer a shoe construction ensuring very good lateral support of the foot.
  • Another goal is to offer a shoe construction allowing good ease of movement of the foot and in particular, good movement of the foot.
  • Another goal is to offer a comfortable shoe.
  • the sports shoe is characterized in that it further comprises a reinforcement composed of a rigid plastic material, having a hardness greater than 40 shore D, the reinforcement comprising a lateral wing fixed on a part of a lateral edge of the damping layer and on an external face of the flexible panel.
  • This shoe construction provides excellent lateral support for the foot.
  • the lateral support of the foot is ensured, on the one hand, by the inextensible panel adjusted by the tightening system and, on the other hand, by the rigid reinforcement superimposed on the base of the inextensible panel.
  • lateral support is reinforced.
  • the inextensible panel and part of the reinforcement are positioned so as to cover part of the lateral quarter of the upper, the holding elements, namely the inextensible panel and the reinforcement, are positioned opposite each other bu lateral edge of the foot, approximately at the level of the cuboid bone. This is where it is important to support the foot to improve stability.
  • This construction makes it possible to locate the stiffening elements in the strictly necessary locations without deteriorating the flexibility of the shoe and in particular, without penalizing the movement of the foot.
  • lateral and medial are understood as facing outwards and inwards respectively.
  • medial side of one foot or shoe faces the medial side of the user's other foot or shoe.
  • longitudinal refers to a heel-toe direction corresponding to the X axis while the term “transverse” refers to a lateral-medial direction corresponding to the Y axis and therefore substantially perpendicular to the longitudinal direction.
  • transverse refers to a lateral-medial direction corresponding to the Y axis and therefore substantially perpendicular to the longitudinal direction.
  • the vertical or down/up direction corresponds to the Z axis.
  • a “shoe” is defined by a “sole” and an “upper”.
  • the “sole” is the lower part of the shoe between the foot and the ground. This is the bottom of the shoe.
  • the “upper” is the upper part of the shoe surrounding the foot and possibly part of the ankle. This is the top of the shoe.
  • the upper is secured to the peripheral edge of the sole. Note that certain elements of the shoe can form both part of the sole and part of the upper.
  • THE figures 1 to 7 illustrate the construction of a sports shoe 1 according to a first embodiment of the invention.
  • the sports shoe 1 for the right foot shown is a running shoe, but could be a completely different type of sports shoe.
  • This shoe 1 is shown in perspective, seen from above, in the figure 1 . It comprises a rod 2, which surmounts a sole assembly 3.
  • the sole 3 comprises a superposition of layers between the ground and the bottom of the foot, as illustrated in Figure 4 .
  • the first layer is an insole 31. It is generally mounted removable inside the shoe.
  • the next layer located below the insole 31 is an insole 32.
  • This second layer 32 is generally fixed to the lower peripheral edges of the upper 2.
  • an external sole 33 under the insole 32.
  • This external sole 33 is generally fixed to the insole 32 in any manner known per se, for example, by gluing. This external sole 33 is intended to come into contact with the ground.
  • the outer sole 33 extends in length from a rear end 33R to a front end 33F, thus defining a length of the sole L33, in width between a lateral side 33L and a medial side 33M, thus defining a width of the sole W33 .
  • the external sole 33 comprises a damping layer 331 and a wear layer 332 and also part of a reinforcement 4 which will be described later.
  • the cushioning layer 331 is made of a material composed of cellular foam, for example, Ethylene-Vinyl Acetate (EVA) or ThermoPlastic Polyurethane (TPU). Other materials are possible.
  • EVA Ethylene-Vinyl Acetate
  • TPU ThermoPlastic Polyurethane
  • This layer 331 extends over substantially the entire length of the external sole L33, that is to say, at least 90% of the total length of the external sole.
  • the wear layer 332 is fixed on the cushioning layer 331 so as to cover a large part of the lower surface of the cushioning layer. This wear layer 332 is thus interposed between the damping layer 331 and the ground. As we see in the figures 1 to 3 And 7 , it can go up on the front part 33F of the sole so as to delimit the front end 33F of the sole. This wear layer 332 is intended to be systematically in contact with the ground. It thus ensures the grip or “grip” of the shoe. Generally, the wear layer 332 is made of rubber or ThermoPlastic Polyurethane (TPU).
  • TPU ThermoPlastic Polyurethane
  • the upper 2 comprises an envelope 21 which extends in length from a rear end 21R to a front end 21F, in width between a lateral side 21L and a medial side 21M, and in height from the sole 3 up to an upper end 21U, the upper end 21U having a shoe opening 22, the shoe opening 22 having a rear subdivision 22R and a front subdivision 22F.
  • the envelope 21 is intended to surround a large part of the foot. It includes an upper covering the front of the foot and lateral and medial quarters covering the back of the foot and in particular the heel.
  • the envelope is made of a flexible material so that it can conform well to the shape of the foot. A multitude of materials can be considered.
  • the envelope 21 can be reinforced locally to ensure that the upper is held in place and/or to protect the foot.
  • a “hard toe” 23 can cover the upper part of the front end 21F of the envelope 21.
  • the front subdivision 22F is delimited by edges of the envelope, at the level of the vamp. Each of these lateral and medial edges carries a series of loops 252 intended to receive a lace 251 of a tightening system 25.
  • the tightening system includes the loops 252, the lace 251, passing through the loops 252 and a blocker, not shown, allowing the length of the lace engaged with the loops to be adjusted, at the level of the front subdivision 22F.
  • the tightening system allows the edges of the front subdivision 22F to be brought together, ensuring that the instep is gripped by the upper. This tightening contributes greatly to the good support of the foot.
  • the rod 2 also comprises an inextensible flexible panel 26 covering a lateral part of the envelope 21.
  • an inextensible panel is a panel made of a material which deforms little or not when we stretch it.
  • the inextensible panel can be a canvas, a fabric, a film. To obtain the characteristic of inextensibility, it can be thanks to a coating applied to a material, for example, by coating, by projection, by printing.
  • the flexible panel 26 extends over the entire height of the upper, from the sole 3 to the lateral edge of the front subdivision 22F.
  • the lower end of the flexible panel 26 is thus fixed on the envelope 21 at the level of a portion of the lateral junction 123L between the upper 2 and the outer sole 33.
  • the upper end of the flexible panel 26 carries a guide member 253 of a portion of the lace 251 of the tightening system 25 of the shoe.
  • This guide member is positioned in place of a loop 252 of the series of passers-by positioned on the side edge of the front subdivision 22F.
  • the guide member 253 is a loop.
  • Other types of guide member can be considered. For example, it can be a hook.
  • the flexible panel 26 is fixed to the envelope 21 by any appropriate means. This can be by gluing and/or welding and/or seams. Here, the lower part of flexible panel 26 is sewn to the envelope 21.
  • the figures 1 , 2 And 4 illustrate the assembly seams 27.
  • the flexible panel 26 extends over a portion of the junction 123L between a first limit 1231 positioned at a distance of one eighth of the outer sole length L33 from the rear end 33R and a second limit 1232 positioned at a distance of half the length of the outer sole. This positioning ensures that the flexible panel 26 is located opposite a specific area of the foot for which support is necessary to improve the stability of the foot.
  • the flexible panel 26 forms a strip whose edges converge upwards.
  • the strip is oriented along a main axis 261, inclined forward by an angle ⁇ of between 25 and 75° relative to a horizontal plane XY. This inclination allows the reinforcement to be positioned by the flexible panel only locally. This makes it possible to avoid stiffening the envelope in areas where flexibility is sought to facilitate the movement of the foot and in particular the rolling of the shoe. This improves ease of movement.
  • the flexible panel 26 is fixed on the envelope 21 over at least the lower quarter of the height of the flexible panel. Otherwise formulated, the flexible panel 26 is fixed on the envelope on at least the lower quarter of the panel along the main axis 261 of the flexible panel 26.
  • the flexible panel 26 is completely integral with the envelope 21. The reinforcing function is fully ensured in this important area for stability. There is no risk of an external element being inserted between the flexible panel 26 and the envelope 21. This avoids any discomfort or hard point (local pressure) during tightening.
  • the flexible panel 26 is separated from the envelope 21 over at least the upper half of the height of the flexible panel. Otherwise formulated, the flexible panel 26 is separated from the envelope 21 on at least the upper half of the panel along the main axis 261 of the flexible panel 26.
  • the fact that the flexible panel is not secured to the envelope in its part high makes it possible not to stiffen the envelope 21 at the level of the vamp. This will make it easier to put your foot on.
  • the inextensible flexible panel 26 is coupled with a reinforcement 4 composed of a rigid plastic material, having a hardness greater than 40 shore D, preferably greater than 50 shore D.
  • a reinforcement 4 composed of a rigid plastic material, having a hardness greater than 40 shore D, preferably greater than 50 shore D.
  • a material can be a PolyAmide (PA) , A ThermoPlastic Polyurethane (TPU), a PolyEster (PE) or even a composite material, for example based on carbon fibers.
  • PA PolyAmide
  • TPU ThermoPlastic Polyurethane
  • PE PolyEster
  • a lateral support of the foot is greatly improved by this coupling of the reinforcement 4 with the flexible panel 26.
  • a lateral part 41 of the reinforcement 4 which will be designated “lateral wing” hereinafter, is fixed on an external face 262 of the flexible panel 26 by any appropriate means. This can be by gluing, welding, sewing.
  • the side wing 41 of the reinforcement 4 covers at least a quarter of the height of the flexible panel 26.
  • the side wing 41 of the reinforcement 4 covers the flexible panel 26 by at least 1.5 centimeters, in height, relative to the lateral junction 123L between the upper 2 and the outer sole 33.
  • the lateral wing 41 of the reinforcement 4 does not rise above half the height of the upper 2 so as not to stiffen the envelope 21 at the level of the vamp. This will make it easier to put your foot on.
  • the side wing 41 can be dimensioned so that the rigidity of the wing decreases the further away from the external sole 33.
  • the thickness of the wing can decrease as a function of the height of the wing, the higher you are, the thinner the wing. This progressive variation in stiffness makes it possible to provide flexibility in the upper part of the wing, an area where we may need to facilitate deformation to help insert the foot into the shoe.
  • the lateral wing 41 of the reinforcement 4 is also fixed on a part of a lateral edge 3311 of the damping layer 331. This makes it possible to contain the damping layer by preventing it in particular from move sideways. It is thus advantageous for the side wing 41 of the reinforcement 4 to cover part of the external sole 33.
  • the reinforcement 4 includes anchoring means making it possible to hold the reinforcement in place and prevent the lateral wing 41 from sagging or flexing laterally.
  • the reinforcement 4 comprises a transverse branch 42 covering part of a lower face 3312 of the damping layer 331.
  • the transverse branch 42 extends transversely, over substantially the entire width W33 of the external sole. 33.
  • the transverse branch 42 and the lateral wing 41 are oriented substantially at 90°, one relative to the other. This configuration ensures very good anchoring of the reinforcement 4 which makes it possible to limit the bending of the side wing 41.
  • the transverse branch 42 is positioned, longitudinally, only facing a transition zone 3313 of the lower face 3312 of the cushioning layer 331 located below the arch of the foot.
  • This transition zone 3313 is located between two zones of contact with the ground. These contact zones are provided on the wear layer 332. They are provided with crampons. Thanks to this arrangement, there is no rigid part of the reinforcement 4 facing the crampons. This allows for better grip and cushioning because the studs can more easily deform vertically.
  • the transverse branch is located in the transition zone, this avoids stiffening the external sole in the metatarsal zone. The sole can more easily flex around a transverse axis Y, which improves the behavior of the shoe and in particular the movement of the foot.
  • the reinforcement 4 also includes a medial wing 43 which raises the external sole 33 to cover only part of a medial edge 3312 of the cushioning layer 331.
  • the medial wing 43 does not cover any medial part of the rod 2.
  • the medial wing 43 extends further upwards to cover a medial part of the rod 2. The medial wing 43 makes it possible to reinforce the anchoring of the reinforcement 4, and more particularly the maintaining the transverse position of the reinforcement.
  • the reinforcement is constructed to form a “U”.
  • the anchor can be a hoop, fixed to the outer sole and running along the rear junction 123R between the upper 2 and the outer sole 33, at the heel level.
  • the part of the side wing 41 facing the flexible panel 26 forms a plate whose edges converge upwards.
  • the plate is oriented along a main axis 411, inclined forward by an angle ⁇ of between 25 and 75° relative to a horizontal plane XY. This inclination allows the reinforcement to be positioned by the reinforcement only locally. This makes it possible to avoid stiffening the envelope in areas where flexibility is sought to facilitate the movement of the foot and in particular the rolling of the shoe. This improves ease of movement.
  • the main axis 411 of this covering part can be coincident with or substantially parallel to the main axis of the flexible panel 26.
  • the part of the side wing 41 facing the flexible panel 26 extends over a portion of the junction 123L between a first limit 1231 positioned at a distance of one eighth of the length L33 of the outer sole from the rear end 33R and a second limit 1232 positioned at a distance of half the length of the outer sole.
  • This positioning ensures that the lateral wing 41 of the reinforcement 4 is located opposite a specific area of the foot for which support is necessary to improve the stability of the foot.
  • lateral support For lateral support to be improved, it is important to have lateral support opposite the Lisfranc joint or tarsometatarsal joint of the foot.
  • This Lisfranc 5 joint whose space extends transversely from one edge of the foot to the other, unites the three cuneiforms and the cuboid to the five metatarsals.
  • the foot pivots around this joint which is, in fact, significantly stressed. In the absence of support, there is a greater risk of twisting the foot.
  • the flexible panel 26 and the side wing 41 of the support 4 are arranged so that a part of the flexible panel 26 and/or the side wing 41 is positioned facing the articulation of Lisfranc 5 or tarsometatarsal joint of the foot when the foot is in the shoe. This positioning is illustrated in Figure 7 .
  • This construction is particularly effective in preventing the risk of external ankle sprains.
  • the inextensible flexible panel 23 does not carry a guide member 253 of a portion of a lace 251 of a tightening system 25 of the shoe.
  • the upper end of the flexible panel is then directly fixed to the rod, for example, by sewing.
  • the lateral edge of the front subdivision 22F comprises a series of loops 252 arranged symmetrically to the series of loops 252 of the medial edge of the front subdivision 22F.
  • the tightening system 25 does not include a loop associated with the flexible expandable panel 23.
  • the lower part of the reinforcement 4 is inserted between the damping layer 331 and part of the wear layer 332 of the outer sole 33.
  • the lower part of the reinforcement 4 covers also a part of the wear layer 332.
  • the reinforcement can completely cover a portion of the assembly of the damping layers 331 and wear layers 332 of the external sole 33. This construction can facilitate the manufacturing process of the external sole 33, the reinforcement being able to be added after the assembly of the damping layers 331 and wear layers 332.
  • the flexible panel 26 extends to also cover part of the bottom of the foot.
  • the flexible panel 26 is inserted between the mounting insole 32 and the external sole 33.
  • the flexible panel 26 extends further to also cover a medial part of the envelope 21.
  • This medial part of the flexible panel 26 can go up to the lateral edge of the front subdivision 22F and can also carry a member for guiding a portion of a lace of a tightening system 25 of the shoe.
  • the flexible panel can form a “U”.
  • the medial part of the flexible panel 26 can be fixed to the envelope in the same way as the lateral part of the flexible panel, as we described previously.
  • the shoe may comprise two separate flexible panels, each panel being respectively fixing the lateral part and the medial part of the envelope 21.
  • the medial part of the flexible panel 26 can be covered by a medial wing of a reinforcement 4.
  • the flexible panel and/or the reinforcement are constructed symmetrically with respect to a central vertical plane XZ, in the sense that the flexible panel and/or the reinforcement rises on either side of the envelope 21 of the rod 2.
  • the flexible panel and/or the reinforcement are not necessarily dimensioned identically at their medial part and their lateral part.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Description

La présente invention concerne une chaussure de marche ou de sport.The present invention relates to a walking or sports shoe.

Lorsqu'il se déplace, en marchant ou en courant, et plus particulièrement sur un terrain accidenté, comme cela peut être le cas en montagne, l'utilisateur va rechercher la stabilité de ses appuis tout en conservant une certaine liberté de mouvement pour davantage d'aisance. Cette stabilité lui permet de limiter les traumatismes et d'éviter les blessures de type entorse ou foulure. Pour cela, il va s'équiper de chaussures assurant un bon maintien du pied.When moving, walking or running, and more particularly on uneven terrain, as may be the case in the mountains, the user will seek the stability of his supports while maintaining a certain freedom of movement for more 'ease. This stability allows it to limit trauma and avoid injuries such as sprains or strains. To do this, he will wear shoes that provide good foot support.

Plusieurs constructions de chaussures proposent une réponse à cette attente. Beaucoup de chaussures intègrent un contrefort arrière couvrant principalement le talon et non les flancs du pied. Dans ce cas, le maintien latéral n'est pas optimum. Un autre type de construction consiste à intercaler un renfort muni d'ailes latérale et/ou médiale, entre la couche amortissante d'un semelage externe et la tige. Le maintien du pied est bon mais la couche amortissante située sous le renfort tend à ajouter de l'instabilité. Un autre type de construction comprend des bandes de renfort souples entourant le cou-de-pied et pouvant remonter jusqu'au système de laçage. Le pied est ainsi bien enserré et relativement bien maintenu. Cependant, le maintien latéral n'est pas optimum. Le risque de torsion du pied subsiste. Une autre construction intègre une coque rigide s'étendant sur principalement toute la longueur de la semelle et comprenant des ailes latérale et/ou médiale, remontant vers la tige. Dans ces constructions, les ailes latérales remontent peu sur la tige et ne sont pas couplées à une bande de renfort souple associée au système de laçage. Le maintien latéral du pied est relativement bon. Cependant, la coque rigide apporte une raideur, notamment pour le déroulé du pied, ce qui pénalise l'aisance des mouvements du pied.Several shoe constructions offer a response to this expectation. Many shoes incorporate a rear counter mainly covering the heel and not the sides of the foot. In this case, lateral support is not optimal. Another type of construction consists of inserting a reinforcement provided with lateral and/or medial wings, between the shock-absorbing layer of an external sole and the upper. Foot support is good but the cushioning layer located under the reinforcement tends to add instability. Another type of construction includes soft reinforcing strips surrounding the instep and extending up to the lacing system. The foot is thus well enclosed and relatively well maintained. However, lateral support is not optimal. The risk of twisting the foot remains. Another construction incorporates a rigid shell extending over mainly the entire length of the sole and including lateral and/or medial wings, going up towards the upper. In these constructions, the side wings rise little on the upper and are not coupled to a flexible reinforcing strip associated with the lacing system. The lateral support of the foot is relatively good. However, the rigid shell provides stiffness, particularly for the movement of the foot, which penalizes the ease of movement of the foot.

Une étude traumatologique a montré que lors de la pratique de randonnée pédestre, environ 80% des blessures se produisent au niveau de la cheville. Dans la majorité des cas, 95% des blessures constatées, il s'agit d'entorses externes de la cheville. Il s'avère donc primordial de renforcer le maintien latéral du pied pour limiter ce type de blessure.A trauma study showed that when hiking, approximately 80% of injuries occur at the ankle level. In the majority of cases, 95% of injuries observed are external ankle sprains. It is therefore essential to strengthen the lateral support of the foot to limit this type of injury.

EP 2 580 978 A1 divulgue une chaussure de sport. EP 2 580 978 A1 discloses a sports shoe.

Le but de l'invention est de proposer une chaussure améliorée.The aim of the invention is to provide an improved shoe.

Un but est notamment de proposer une construction de chaussure assurant un très bon maintien latéral du pied.One aim is in particular to offer a shoe construction ensuring very good lateral support of the foot.

Un autre but est de proposer une construction de chaussure permettant une bonne aisance de mouvement de pied et notamment, un bon déroulé du pied.Another goal is to offer a shoe construction allowing good ease of movement of the foot and in particular, good movement of the foot.

Un autre but est de proposer une chaussure confortable.Another goal is to offer a comfortable shoe.

L'invention propose un semelage externe d'une chaussure comprenant :

  • un semelage externe comportant une couche d'amortissement s'étendant sur sensiblement toute la longueur du semelage externe,
  • une tige fixée sur le semelage externe, la tige comportant
    • ∘ une enveloppe destinée à entourer une partie du pied de l'utilisateur et
    • ∘ un panneau souple inextensible fixé sur l'enveloppe au niveau d'une portion de la jonction latérale entre la tige et la semelle externe.
The invention proposes an external sole of a shoe comprising:
  • an external sole comprising a cushioning layer extending over substantially the entire length of the external sole,
  • a rod fixed to the external sole, the rod comprising
    • ∘ an envelope intended to surround part of the user's foot and
    • ∘ a flexible inextensible panel fixed to the envelope at a portion of the lateral junction between the upper and the external sole.

La chaussure de sport est caractérisée en ce qu'elle comprend en outre un renfort composé d'un matériau plastique rigide, présentant une dureté supérieure à 40 shore D, le renfort comportant une aile latérale fixée sur une partie d'un bord latéral de la couche d'amortissement et sur une face externe du panneau souple.The sports shoe is characterized in that it further comprises a reinforcement composed of a rigid plastic material, having a hardness greater than 40 shore D, the reinforcement comprising a lateral wing fixed on a part of a lateral edge of the damping layer and on an external face of the flexible panel.

Cette construction de chaussure apporte un excellent maintien latéral du pied. Le maintien latéral du pied est assuré, d'une part, par le panneau inextensible ajusté par le système de serrage et, d'autre part, par le renfort rigide superposé à la base du panneau inextensible. En recouvrant une partie latérale de la couche d'amortissement du semelage externe, on renforce la tenue latérale. Avec cette construction, le panneau inextensible et une partie du renfort sont positionnés de sorte à recouvrir une partie du quartier latéral de la tige, les éléments de maintien, à savoir le panneau inextensible et le renfort, sont positionnés en vis-à-vis bu bord latéral du pied, sensiblement au niveau de l'os cuboïde. C'est l'endroit où il est important de soutenir le pied afin d'améliorer la stabilité. Cette construction permet de localiser les éléments de rigidification aux emplacements strictement nécessaires sans détériorer la souplesse de la chaussure et notamment, sans pénaliser le déroulé du pied.This shoe construction provides excellent lateral support for the foot. The lateral support of the foot is ensured, on the one hand, by the inextensible panel adjusted by the tightening system and, on the other hand, by the rigid reinforcement superimposed on the base of the inextensible panel. By covering a lateral part of the cushioning layer of the external sole, lateral support is reinforced. With this construction, the inextensible panel and part of the reinforcement are positioned so as to cover part of the lateral quarter of the upper, the holding elements, namely the inextensible panel and the reinforcement, are positioned opposite each other bu lateral edge of the foot, approximately at the level of the cuboid bone. This is where it is important to support the foot to improve stability. This construction makes it possible to locate the stiffening elements in the strictly necessary locations without deteriorating the flexibility of the shoe and in particular, without penalizing the movement of the foot.

Selon des aspects avantageux mais non obligatoires de l'invention, une telle chaussure peut incorporer une ou plusieurs des caractéristiques suivantes, prises dans toute combinaison techniquement admissible :

  • Le panneau souple et l'aile latérale du support sont agencés de sorte qu'une partie du panneau souple et/ou de l'aile latérale soit positionnée en regard de l'articulation de Lisfranc ou articulation tarsométatarsienne du pied lorsque le pied est dans la chaussure.
  • Le panneau souple comprend une extrémité haute portant un organe de guidage d'une portion d'un lacet d'un système de serrage de la chaussure.
  • Le renfort comprend une branche transversale recouvrant une partie d'une face inférieure de la couche d'amortissement, la branche transversale s'étendant transversalement, sur sensiblement toute la largeur du semelage externe.
  • La branche transversale est positionnée, longitudinalement, uniquement en regard d'une zone de transition de la face inférieure de la couche d'amortissement située en dessous de la voûte plantaire.
  • Au niveau de la jonction latérale entre la tige et la semelle externe, la partie de l'aile latérale en regard du panneau souple s'étend sur une portion de la jonction latérale comprise entre une première limite positionnée à une distance d'un huitième de la longueur du semelage externe à partir de l'extrémité arrière et une deuxième limite positionnée à une distance de la moitié de la longueur du semelage externe.
  • Le panneau souple est orienté selon un axe principal vers l'avant d'un angle compris entre 25 et 75° par rapport à un plan horizontal et en ce que la partie de l'aile latérale en regard du panneau souple est orientée selon un axe principal incliné vers l'avant d'un angle compris entre 25 et 75° par rapport à un plan horizontal.
  • Une partie de l'aile latérale est collée sur le panneau souple.
  • Le renfort comprend une aile médiale fixée sur au moins une partie d'un bord latéral de la couche d'amortissement.
  • L'aile latérale recouvre au moins un quart de la hauteur du panneau souple.
  • L'aile latérale ne remonte pas au-dessus de la moitié de la hauteur de la tige.
  • L'aile latérale est dimensionnée de sorte que la rigidité de l'aile décroît plus on s'écarte du semelage externe.
  • Le renfort est composé d'un matériau parmi les suivant : un PolyAmide (PA), un Polyuréthane ThermoPlastique (TPU), un PolyEster (PE) ou encore un matériau composite.
  • Le panneau souple est fixé sur l'enveloppe sur au moins le quart inférieur de la hauteur du panneau souple.
  • Le panneau souple est désolidarisé de l'enveloppe sur au moins la moitié supérieure de la hauteur du panneau.
According to advantageous but not obligatory aspects of the invention, such a shoe can incorporate one or more of the following characteristics, taken in any technically admissible combination:
  • The flexible panel and the lateral wing of the support are arranged so that a part of the flexible panel and/or the lateral wing is positioned opposite the Lisfranc joint or tarsometatarsal joint of the foot when the foot is in the shoe.
  • The flexible panel comprises a high end carrying a member for guiding a portion of a lace of a shoe tightening system.
  • The reinforcement comprises a transverse branch covering a part of a lower face of the damping layer, the transverse branch extending transversely, over substantially the entire width of the external sole.
  • The transverse branch is positioned, longitudinally, only opposite a transition zone of the lower face of the cushioning layer located below the arch of the foot.
  • At the level of the lateral junction between the upper and the external sole, the part of the lateral wing facing the flexible panel extends over a portion of the lateral junction between a first limit positioned at a distance of one eighth of the length of the outer sole from the rear end and a second limit positioned at a distance of half the length of the outer sole.
  • The flexible panel is oriented along a main axis towards the front at an angle of between 25 and 75° relative to a horizontal plane and in that the part of the side wing facing the flexible panel is oriented along an axis main inclined forward at an angle between 25 and 75° relative to a horizontal plane.
  • Part of the side wing is glued to the flexible panel.
  • The reinforcement includes a medial wing attached to at least a portion of a lateral edge of the cushioning layer.
  • The side wing covers at least a quarter of the height of the flexible panel.
  • The side wing does not rise above half the height of the stem.
  • The lateral wing is dimensioned so that the rigidity of the wing decreases the further away from the external sole.
  • The reinforcement is composed of one of the following materials: a PolyAmide (PA), a ThermoPlastic Polyurethane (TPU), a PolyEster (PE) or even a composite material.
  • The flexible panel is fixed to the envelope over at least the lower quarter of the height of the flexible panel.
  • The flexible panel is separated from the envelope over at least the upper half of the height of the panel.

D'autres caractéristiques et avantages de l'invention seront mieux compris à l'aide de la description qui va suivre, en regard des dessins annexés illustrant, selon des formes de réalisation non limitatives, comment l'invention peut être réalisée, et dans lequel :

  • [Fig. 1] La figure 1 est une vue de dessus en perspective avant d'une chaussure pour pied droit selon l'invention.
  • [Fig. 2] La figure 2 est une vue de côté, côté latéral, de la chaussure de la figure 1.
  • [Fig. 3] La figure 3 est une vue de côté, côté médial, de la chaussure de la figure 1.
  • [Fig. 4] La figure 4 est une vue schématique de la section selon IV-IV de la figure 1.
  • [Fig. 5] La figure 5 est une vue de dessus de la chaussure de la figure 1.
  • [Fig. 6] La figure 6 est une vue éclatée d'un semelage externe de la chaussure de la figure 1.
  • [Fig. 7] La figure 7 est une vue schématique de côté, côté latéral, de la chaussure de la figure 1 dans laquelle on a représenté la partie osseuse d'un pied qui serait introduit dans la chaussure.
Other characteristics and advantages of the invention will be better understood with the aid of the description which follows, with reference to the appended drawings illustrating, according to non-limiting embodiments, how the invention can be carried out, and in which :
  • [ Fig. 1 ] There figure 1 is a front perspective top view of a shoe for the right foot according to the invention.
  • [ Fig. 2 ] There figure 2 is a side view, lateral side, of the shoe of the figure 1 .
  • [ Fig. 3 ] There Figure 3 is a side view, medial side, of the shoe of the figure 1 .
  • [ Fig. 4 ] There Figure 4 is a schematic view of the section according to IV-IV of the figure 1 .
  • [ Fig. 5 ] There Figure 5 is a top view of the shoe of the figure 1 .
  • [ Fig. 6 ] There Figure 6 is an exploded view of an external sole of the shoe of the figure 1 .
  • [ Fig. 7 ] There Figure 7 is a schematic side view, lateral side, of the shoe of the figure 1 in which the bony part of a foot which would be inserted into the shoe is shown.

Dans la suite de la description, il sera fait usage de termes tels que « vertical », « supérieur », « inférieur », « haut », « bas », « transversal », « latéral », « médial », « droite », « gauche », « horizontal », « antérieur », « postérieur », « devant », « derrière », « avant », « arrière ». Ces termes doivent être interprétés en fait de façon relative en relation avec la position que la chaussure occupe sur le pied d'un utilisateur en posture normale, et la direction d'avancement normale d'un utilisateur. On considérera la configuration pour laquelle la semelle est posée à plat sur un sol horizontal.In the following description, terms such as “vertical”, “superior”, “inferior”, “top”, “bottom”, “transverse”, “lateral”, “medial”, “right” will be used. , “left”, “horizontal”, “anterior”, “posterior”, “front”, “behind”, “front”, “rear”. These terms must in fact be interpreted relatively in relation to the position that the shoe occupies on the foot of a user in normal posture, and the normal direction of advancement of a user. We will consider the configuration for which the sole is placed flat on a horizontal ground.

Les termes « latéral » et « médial », de manière conventionnelle, s'entendent comme tournés respectivement vers l'extérieur et vers l'intérieur. Ainsi, le côté médial d'un pied ou d'une chaussure est tourné vers le côté médial de l'autre pied ou de l'autre chaussure de l'utilisateur.The terms “lateral” and “medial”, conventionally, are understood as facing outwards and inwards respectively. Thus, the medial side of one foot or shoe faces the medial side of the user's other foot or shoe.

Le terme « longitudinal » fait référence à une direction talon-orteils correspondant à l'axe X alors que le terme « transversal », fait référence à une direction latéral-médial correspondant à l'axe Y et donc sensiblement perpendiculaire à la direction longitudinale. La direction verticale ou bas/haut correspond à l'axe Z.The term "longitudinal" refers to a heel-toe direction corresponding to the X axis while the term "transverse" refers to a lateral-medial direction corresponding to the Y axis and therefore substantially perpendicular to the longitudinal direction. The vertical or down/up direction corresponds to the Z axis.

Dans la description, une « chaussure » est définie par un « semelage » et une « tige ». Le « semelage » est la partie inférieure de la chaussure comprise entre le pied et le sol. C'est le dessous de la chaussure. La « tige » est la partie supérieure de la chaussure enveloppant le pied et éventuellement une partie de la cheville. C'est le dessus de la chaussure. La tige est solidarisée avec le bord périphérique du semelage. A noter que certains éléments de la chaussure peuvent former à la fois une partie du semelage et une partie de la tige.In the description, a “shoe” is defined by a “sole” and an “upper”. The “sole” is the lower part of the shoe between the foot and the ground. This is the bottom of the shoe. The “upper” is the upper part of the shoe surrounding the foot and possibly part of the ankle. This is the top of the shoe. The upper is secured to the peripheral edge of the sole. Note that certain elements of the shoe can form both part of the sole and part of the upper.

Les figures 1 à 7 illustrent la construction d'une chaussure de sport 1 selon un premier mode de réalisation de l'invention. La chaussure de sport 1 pour pied droit représentée est une chaussure de course à pied, mais pourrait être un tout autre type de chaussure de sport. Cette chaussure 1 est représentée en perspective, vue de dessus, dans la figure 1. Elle comporte une tige 2, qui surmonte un semelage 3.THE figures 1 to 7 illustrate the construction of a sports shoe 1 according to a first embodiment of the invention. The sports shoe 1 for the right foot shown is a running shoe, but could be a completely different type of sports shoe. This shoe 1 is shown in perspective, seen from above, in the figure 1 . It comprises a rod 2, which surmounts a sole assembly 3.

Dans cet exemple, le semelage 3 comprend une superposition de couches entre le sol et le dessous du pied, comme illustrée à la figure 4. En partant du pied, la première couche est une première de propreté 31. Elle est généralement montée amovible à l'intérieur de la chaussure. La couche suivante située dessous la première de propreté 31 est une première de montage 32. Cette deuxième couche 32 est généralement fixée aux bords périphériques inférieurs de la tige 2. Enfin, on retrouve un semelage externe 33, sous la première de montage 32. Ce semelage externe 33 est généralement fixé sur la première de montage 32 de toute façon connue en soi, par exemple, par collage. Ce semelage externe 33 est destiné à venir au contact du sol.In this example, the sole 3 comprises a superposition of layers between the ground and the bottom of the foot, as illustrated in Figure 4 . Starting from the foot, the first layer is an insole 31. It is generally mounted removable inside the shoe. The next layer located below the insole 31 is an insole 32. This second layer 32 is generally fixed to the lower peripheral edges of the upper 2. Finally, we find an external sole 33, under the insole 32. This external sole 33 is generally fixed to the insole 32 in any manner known per se, for example, by gluing. This external sole 33 is intended to come into contact with the ground.

Le semelage externe 33 s'étend en longueur depuis une extrémité arrière 33R jusqu'à une extrémité avant 33F, définissant ainsi une longueur du semelage L33, en largeur entre un côté latéral 33L et un côté médial 33M, définissant ainsi une largeur du semelage W33.The outer sole 33 extends in length from a rear end 33R to a front end 33F, thus defining a length of the sole L33, in width between a lateral side 33L and a medial side 33M, thus defining a width of the sole W33 .

Ici, le semelage externe 33 comprend une couche d'amortissement 331 et une couche d'usure 332 et également une partie d'un renfort 4 qui sera décrit ultérieurement.Here, the external sole 33 comprises a damping layer 331 and a wear layer 332 and also part of a reinforcement 4 which will be described later.

La couche d'amortissement 331 est constituée d'un matériau composé de mousse alvéolaire, par exemple, de l'Ethylène-Acétate de Vinyle (EVA) ou du Polyuréthane ThermoPlastique (TPU). D'autres matières sont envisageables. Cette couche 331 s'étend sur sensiblement toute la longueur du semelage externe L33, c'est-à-dire, au moins 90% de la longueur totale du semelage externe.The cushioning layer 331 is made of a material composed of cellular foam, for example, Ethylene-Vinyl Acetate (EVA) or ThermoPlastic Polyurethane (TPU). Other materials are possible. This layer 331 extends over substantially the entire length of the external sole L33, that is to say, at least 90% of the total length of the external sole.

La couche d'usure 332 est fixée sur la couche d'amortissement 331 de sorte à recouvrir une grande partie de la surface inférieure de la couche d'amortissement. Cette couche d'usure 332 est ainsi intercalée entre la couche d'amortissement 331 et le sol. Comme on le voit dans les figures 1 à 3 et 7, elle peut remonter sur la partie avant 33F du semelage de sorte à délimiter l'extrémité avant 33F du semelage. Cette couche d'usure 332 est destinée à être systématiquement en contact avec le sol. Elle assure ainsi l'accroche ou « grip » de la chaussure. Généralement, la couche d'usure 332 est constituée de caoutchouc ou du Polyuréthane ThermoPlastique (TPU).The wear layer 332 is fixed on the cushioning layer 331 so as to cover a large part of the lower surface of the cushioning layer. This wear layer 332 is thus interposed between the damping layer 331 and the ground. As we see in the figures 1 to 3 And 7 , it can go up on the front part 33F of the sole so as to delimit the front end 33F of the sole. This wear layer 332 is intended to be systematically in contact with the ground. It thus ensures the grip or “grip” of the shoe. Generally, the wear layer 332 is made of rubber or ThermoPlastic Polyurethane (TPU).

Dans cet exemple, la tige 2 comprend une enveloppe 21 qui s'étend en longueur depuis une extrémité arrière 21R jusqu'à une extrémité avant 21F, en largeur entre un côté latéral 21L et un côté médial 21M, et en hauteur depuis le semelage 3 jusqu'à une extrémité supérieure 21U, l'extrémité supérieure 21U présentant une ouverture de chaussage 22, l'ouverture de chaussage 22 présentant une subdivision arrière 22R et une subdivision avant 22F. De manière classique, l'enveloppe 21 est destinée à entourer une grande partie du pied. Elle comprend une empeigne couvrant l'avant du pied et des quartiers latéral et médial couvrant l'arrière du pied et notamment le talon. L'enveloppe est réalisée dans un matériau souple de manière à pouvoir bien épouser les formes du pied. Une multitude de matériau peut être envisagé. Ce peut être une toile, un tissu, un tricot, un film... L'enveloppe 21 peut être renforcée localement pour assurer une tenue de la tige et/ou protéger le pied. Par exemple, un « bout dur » 23 peut couvrir la partie supérieure de l'extrémité avant 21F de l'enveloppe 21. La subdivision avant 22F est délimitée par des bordures de l'enveloppe, au niveau de l'empeigne. Chacune de ces bordures latérale et médiale porte une série de passants 252 destinés à recevoir un lacet 251 d'un système de serrage 25. Le système de serrage comprend les passants 252, le lacet 251, cheminant à travers les passants 252 et un bloqueur, non représenté, permettant d'ajuster la longueur du lacet en prise avec les passants, au niveau de la subdivision avant 22F. Le système de serrage permet de rapprocher les bords de la subdivision avant 22F assurant l'enserrement du cou-de-pied par l'empeigne. Ce serrage contribue fortement au bon maintien du pied.In this example, the upper 2 comprises an envelope 21 which extends in length from a rear end 21R to a front end 21F, in width between a lateral side 21L and a medial side 21M, and in height from the sole 3 up to an upper end 21U, the upper end 21U having a shoe opening 22, the shoe opening 22 having a rear subdivision 22R and a front subdivision 22F. Conventionally, the envelope 21 is intended to surround a large part of the foot. It includes an upper covering the front of the foot and lateral and medial quarters covering the back of the foot and in particular the heel. The envelope is made of a flexible material so that it can conform well to the shape of the foot. A multitude of materials can be considered. It can be a canvas, a fabric, a knit, a film, etc. The envelope 21 can be reinforced locally to ensure that the upper is held in place and/or to protect the foot. For example, a “hard toe” 23 can cover the upper part of the front end 21F of the envelope 21. The front subdivision 22F is delimited by edges of the envelope, at the level of the vamp. Each of these lateral and medial edges carries a series of loops 252 intended to receive a lace 251 of a tightening system 25. The tightening system includes the loops 252, the lace 251, passing through the loops 252 and a blocker, not shown, allowing the length of the lace engaged with the loops to be adjusted, at the level of the front subdivision 22F. The tightening system allows the edges of the front subdivision 22F to be brought together, ensuring that the instep is gripped by the upper. This tightening contributes greatly to the good support of the foot.

Selon l'invention, la tige 2 comprend également un panneau souple inextensible 26 couvrant une partie latérale de l'enveloppe 21. Au sens de l'invention, un panneau inextensible est un panneau constitué d'un matériau qui se déforme peu ou pas lorsqu'on l'étire. Le panneau inextensible peut être une toile, un tissu, un film. Pour obtenir la caractéristique d'inextensibilité, ce peut être grâce à un revêtement apposé à un matériau, par exemple, par enduction, par projection, par impression. Le panneau souple 26 s'étend sur toute la hauteur de la tige, du semelage 3 jusqu'à la bordure latérale de la subdivision avant 22F. L'extrémité basse du panneau souple 26 est ainsi fixée sur l'enveloppe 21 au niveau d'une portion de la jonction latérale 123L entre la tige 2 et la semelle externe 33. L'extrémité haute du panneau souple 26 porte un organe de guidage 253 d'une portion du lacet 251 du système de serrage 25 de la chaussure. Cet organe de guidage se positionne en lieu et place d'un passant 252 de la série des passants positionnés sur la bordure latérale de la subdivision avant 22F. Dans cet exemple, l'organe de guidage 253 est un passant. D'autres types d'organe de guidage peuvent être envisagés. Par exemple, ce peut être un crochet. En agissant sur le système de serrage, l'utilisateur va ainsi plaquer le panneau souple 26 contre l'enveloppe 21. Le panneau souple 26 permet alors de renforcer le maintien latéral du pied. Le panneau souple 26 est fixé sur l'enveloppe 21 par tout moyen approprié. Ce peut être par collage et/ou soudage et/ou des coutures. Ici, la partie basse de panneau souple 26 est cousue à l'enveloppe 21. Les figures 1, 2 et 4 illustrent les coutures d'assemblage 27.According to the invention, the rod 2 also comprises an inextensible flexible panel 26 covering a lateral part of the envelope 21. Within the meaning of the invention, an inextensible panel is a panel made of a material which deforms little or not when we stretch it. The inextensible panel can be a canvas, a fabric, a film. To obtain the characteristic of inextensibility, it can be thanks to a coating applied to a material, for example, by coating, by projection, by printing. The flexible panel 26 extends over the entire height of the upper, from the sole 3 to the lateral edge of the front subdivision 22F. The lower end of the flexible panel 26 is thus fixed on the envelope 21 at the level of a portion of the lateral junction 123L between the upper 2 and the outer sole 33. The upper end of the flexible panel 26 carries a guide member 253 of a portion of the lace 251 of the tightening system 25 of the shoe. This guide member is positioned in place of a loop 252 of the series of passers-by positioned on the side edge of the front subdivision 22F. In this example, the guide member 253 is a loop. Other types of guide member can be considered. For example, it can be a hook. By acting on the tightening system, the user will thus press the flexible panel 26 against the envelope 21. The flexible panel 26 then makes it possible to reinforce the lateral support of the foot. The flexible panel 26 is fixed to the envelope 21 by any appropriate means. This can be by gluing and/or welding and/or seams. Here, the lower part of flexible panel 26 is sewn to the envelope 21. The figures 1 , 2 And 4 illustrate the assembly seams 27.

Dans cet exemple, au niveau de la jonction latérale 123L entre la tige 2 et la semelle externe 33, le panneau souple 26 s'étend sur une portion de la jonction 123L comprise entre une première limite 1231 positionnée à une distance d'un huitième de la longueur L33 semelage externe à partir de l'extrémité arrière 33R et une deuxième limite 1232 positionnée à une distance de la moitié de la longueur du semelage externe. Ce positionnement permet de s'assurer que le panneau souple 26 se situe en regard d'une zone du pied spécifique pour laquelle un support est nécessaire pour améliorer la stabilité du pied.In this example, at the level of the lateral junction 123L between the upper 2 and the outer sole 33, the flexible panel 26 extends over a portion of the junction 123L between a first limit 1231 positioned at a distance of one eighth of the outer sole length L33 from the rear end 33R and a second limit 1232 positioned at a distance of half the length of the outer sole. This positioning ensures that the flexible panel 26 is located opposite a specific area of the foot for which support is necessary to improve the stability of the foot.

Dans cet exemple, le panneau souple 26 forme une bande dont les bords convergent vers le haut. La bande est orientée selon un axe principal 261, incliné vers l'avant d'un angle α compris entre 25 et 75° par rapport à un plan horizontal XY. Cette inclinaison permet de positionner le renforcement par le panneau souple que localement. Cela permet de ne pas rigidifier l'enveloppe dans des zones où l'on recherche de la souplesse pour faciliter le mouvement du pied et notamment le déroulé de la chaussure. On améliore ainsi l'aisance des mouvements.In this example, the flexible panel 26 forms a strip whose edges converge upwards. The strip is oriented along a main axis 261, inclined forward by an angle α of between 25 and 75° relative to a horizontal plane XY. This inclination allows the reinforcement to be positioned by the flexible panel only locally. This makes it possible to avoid stiffening the envelope in areas where flexibility is sought to facilitate the movement of the foot and in particular the rolling of the shoe. This improves ease of movement.

Dans cet exemple, le panneau souple 26 est fixé sur l'enveloppe 21 sur au moins le quart inférieur de la hauteur du panneau souple. Autrement formulé, le panneau souple 26 est fixé sur l'enveloppe sur au moins le quart inférieur du panneau selon l'axe principal 261 du panneau souple 26. En étant fixé sur l'enveloppe 21 dans sa partie basse, le panneau souple 26 est complètement solidaire de l'enveloppe 21. La fonction de renfort est pleinement assurée dans cette zone importante pour la stabilité. Il n'y a pas de risque qu'un élément extérieur s'intercale entre le panneau souple 26 et l'enveloppe 21. On évite ainsi toute gêne ou point dur (pression locale) lors du serrage.In this example, the flexible panel 26 is fixed on the envelope 21 over at least the lower quarter of the height of the flexible panel. Otherwise formulated, the flexible panel 26 is fixed on the envelope on at least the lower quarter of the panel along the main axis 261 of the flexible panel 26. By being fixed on the envelope 21 in its lower part, the flexible panel 26 is completely integral with the envelope 21. The reinforcing function is fully ensured in this important area for stability. There is no risk of an external element being inserted between the flexible panel 26 and the envelope 21. This avoids any discomfort or hard point (local pressure) during tightening.

Dans cet exemple, le panneau souple 26 est désolidarisé de l'enveloppe 21 sur au moins la moitié supérieure de la hauteur du panneau souple. Autrement formulé, le panneau souple 26 est désolidarisé de l'enveloppe 21 sur au moins la moitié supérieure du panneau selon l'axe principal 261 du panneau souple 26. Le fait que le panneau souple ne soit pas solidaire de l'enveloppe dans sa partie haute permet de ne pas rigidifier l'enveloppe 21 au niveau de l'empeigne. On va ainsi faciliter le chaussage du pied.In this example, the flexible panel 26 is separated from the envelope 21 over at least the upper half of the height of the flexible panel. Otherwise formulated, the flexible panel 26 is separated from the envelope 21 on at least the upper half of the panel along the main axis 261 of the flexible panel 26. The fact that the flexible panel is not secured to the envelope in its part high makes it possible not to stiffen the envelope 21 at the level of the vamp. This will make it easier to put your foot on.

Selon l'invention, le panneau souple inextensible 26 est couplé avec un renfort 4 composé d'un matériau plastique rigide, présentant une dureté supérieure à 40 shore D, préférentiellement supérieure à 50 shore D. Un tel matériau peut être un PolyAmide (PA), un Polyuréthane ThermoPlastique (TPU), un PolyEster (PE) ou encore un matériau composite, par exemple à base de fibres de carbone. Ainsi, le maintien latéral du pied est fortement amélioré par ce couplage du renfort 4 avec le panneau souple 26. Pour que le maintien soit efficace, une partie latérale 41 du renfort 4, qu'on désignera « aile latérale » par la suite, est fixée sur une face externe 262 du panneau souple 26 par tout moyen approprié. Ce peut être par collage, soudage, couture. Avantageusement, l'aile latérale 41 du renfort 4 recouvre au moins un quart de la hauteur du panneau souple 26. Selon un mode de réalisation, l'aile latérale 41 du renfort 4 recouvre le panneau souple 26 sur au moins 1,5 centimètre, en hauteur, par rapport à la jonction latérale 123L entre la tige 2 et la semelle externe 33. Préférentiellement, l'aile latérale 41 du renfort 4 ne remonte pas au-dessus de la moitié de la hauteur de la tige 2 afin de ne pas rigidifier l'enveloppe 21 au niveau de l'empeigne. On va ainsi faciliter le chaussage du pied. L'aile latérale 41 peut être dimensionnée de sorte que la rigidité de l'aile décroît plus on s'écarte du semelage externe 33. Par exemple, l'épaisseur de l'aile peut décroître en fonction de la hauteur de l'aile, plus on est haut, moins l'aile est épaisse. Cette variation progressive de raideur permet de donner de la souplesse dans la partie haute de l'aile, zone où l'on peut avoir besoin de faciliter la déformation pour aider à l'introduction du pied dans la chaussure.According to the invention, the inextensible flexible panel 26 is coupled with a reinforcement 4 composed of a rigid plastic material, having a hardness greater than 40 shore D, preferably greater than 50 shore D. Such a material can be a PolyAmide (PA) , A ThermoPlastic Polyurethane (TPU), a PolyEster (PE) or even a composite material, for example based on carbon fibers. Thus, the lateral support of the foot is greatly improved by this coupling of the reinforcement 4 with the flexible panel 26. For the support to be effective, a lateral part 41 of the reinforcement 4, which will be designated "lateral wing" hereinafter, is fixed on an external face 262 of the flexible panel 26 by any appropriate means. This can be by gluing, welding, sewing. Advantageously, the side wing 41 of the reinforcement 4 covers at least a quarter of the height of the flexible panel 26. According to one embodiment, the side wing 41 of the reinforcement 4 covers the flexible panel 26 by at least 1.5 centimeters, in height, relative to the lateral junction 123L between the upper 2 and the outer sole 33. Preferably, the lateral wing 41 of the reinforcement 4 does not rise above half the height of the upper 2 so as not to stiffen the envelope 21 at the level of the vamp. This will make it easier to put your foot on. The side wing 41 can be dimensioned so that the rigidity of the wing decreases the further away from the external sole 33. For example, the thickness of the wing can decrease as a function of the height of the wing, the higher you are, the thinner the wing. This progressive variation in stiffness makes it possible to provide flexibility in the upper part of the wing, an area where we may need to facilitate deformation to help insert the foot into the shoe.

Pour obtenir un bon maintien latéral, l'aile latérale 41 du renfort 4 est également fixée sur une partie d'un bord latéral 3311 de la couche d'amortissement 331. Cela permet de contenir la couche d'amortissement en l'empêchant notamment de se déporter latéralement. Il est ainsi avantageux que l'aile latérale 41 du renfort 4 couvre une partie du semelage externe 33.To obtain good lateral support, the lateral wing 41 of the reinforcement 4 is also fixed on a part of a lateral edge 3311 of the damping layer 331. This makes it possible to contain the damping layer by preventing it in particular from move sideways. It is thus advantageous for the side wing 41 of the reinforcement 4 to cover part of the external sole 33.

Pour accroître davantage le maintien latéral, le renfort 4 comprend des moyens d'ancrage permettant de maintenir en place le renfort et éviter que l'aile latérale 41 ne s'affaisse ou fléchisse latéralement.To further increase lateral support, the reinforcement 4 includes anchoring means making it possible to hold the reinforcement in place and prevent the lateral wing 41 from sagging or flexing laterally.

Selon le mode de réalisation illustré, le renfort 4 comprend une branche transversale 42 recouvrant une partie d'une face inférieure 3312 de la couche d'amortissement 331. La branche transversale 42 s'étend transversalement, sur sensiblement toute la largeur W33 du semelage externe 33. Ainsi, la branche transversale 42 et l'aile latérale 41 sont orientées sensiblement à 90°, l'une par rapport à l'autre. Cette configuration assure un très bon ancrage du renfort 4 qui permet de limiter le fléchissement de l'aile latérale 41.According to the illustrated embodiment, the reinforcement 4 comprises a transverse branch 42 covering part of a lower face 3312 of the damping layer 331. The transverse branch 42 extends transversely, over substantially the entire width W33 of the external sole. 33. Thus, the transverse branch 42 and the lateral wing 41 are oriented substantially at 90°, one relative to the other. This configuration ensures very good anchoring of the reinforcement 4 which makes it possible to limit the bending of the side wing 41.

Avantageusement, la branche transversale 42 est positionnée, longitudinalement, uniquement en regard d'une zone de transition 3313 de la face inférieure 3312 de la couche d'amortissement 331 située en dessous de la voûte plantaire. Cette zone de transition 3313 est localisée entre deux zones de contact avec le sol. Ces zones de contact sont ménagées sur la couche d'usure 332. Elles sont munies de crampons. Grâce à cette disposition, il n'y a pas de partie rigide du renfort 4 en regard des crampons. Cela permet une meilleure adhérence et amortissement car les crampons peuvent plus facilement se déformer verticalement. De plus, du fait que la branche transversale est localisée dans la zone de transition, cela permet de ne pas rigidifier le semelage externe dans la zone de métatarse. La semelle peut plus facilement fléchir autour d'un axe transversal Y, ce qui améliore le comportement de la chaussure et notamment le déroulé de pied.Advantageously, the transverse branch 42 is positioned, longitudinally, only facing a transition zone 3313 of the lower face 3312 of the cushioning layer 331 located below the arch of the foot. This transition zone 3313 is located between two zones of contact with the ground. These contact zones are provided on the wear layer 332. They are provided with crampons. Thanks to this arrangement, there is no rigid part of the reinforcement 4 facing the crampons. This allows for better grip and cushioning because the studs can more easily deform vertically. In addition, because the transverse branch is located in the transition zone, this avoids stiffening the external sole in the metatarsal zone. The sole can more easily flex around a transverse axis Y, which improves the behavior of the shoe and in particular the movement of the foot.

Dans cet exemple, le renfort 4 comprend également une aile médiale 43 qui remonte le semelage externe 33 pour ne recouvrir qu'une partie d'un bord médial 3312 de la couche d'amortissement 331. L'aile médiale 43 ne recouvre aucune partie médiale de la tige 2. Selon une variante, l'aile médiale 43 s'étend davantage vers le haut pour couvrir une partie médiale de la tige 2. L'aile médiale 43 permet de renforcer l'ancrage du renfort 4, et plus particulièrement le maintien de la position transversale du renfort.In this example, the reinforcement 4 also includes a medial wing 43 which raises the external sole 33 to cover only part of a medial edge 3312 of the cushioning layer 331. The medial wing 43 does not cover any medial part of the rod 2. According to a variant, the medial wing 43 extends further upwards to cover a medial part of the rod 2. The medial wing 43 makes it possible to reinforce the anchoring of the reinforcement 4, and more particularly the maintaining the transverse position of the reinforcement.

Ainsi, le renfort est construit de sorte à former un « U ».Thus, the reinforcement is constructed to form a “U”.

Alternativement, d'autres formes de renfort peuvent être envisagées. Par exemple, l'ancrage peut être un arceau, fixé au semelage externe et longeant la jonction arrière 123R entre la tige 2 et la semelle externe 33, au niveau du talon.Alternatively, other forms of reinforcement can be considered. For example, the anchor can be a hoop, fixed to the outer sole and running along the rear junction 123R between the upper 2 and the outer sole 33, at the heel level.

Dans cet exemple, la partie de l'aile latérale 41 en regard du panneau souple 26 forme une plaque dont les bords convergent vers le haut. La plaque est orientée selon un axe principal 411, incliné vers l'avant d'un angle β compris entre 25 et 75° par rapport à un plan horizontal XY. Cette inclinaison permet de positionner le renforcement par le renfort que localement. Cela permet de ne pas rigidifier l'enveloppe dans des zones où l'on recherche de la souplesse pour faciliter le mouvement du pied et notamment le déroulé de la chaussure. On améliore ainsi l'aisance des mouvements. L'axe principal 411 de cette partie de recouvrement peut être confondu ou sensiblement parallèle à l'axe principal du panneau souple 26.In this example, the part of the side wing 41 facing the flexible panel 26 forms a plate whose edges converge upwards. The plate is oriented along a main axis 411, inclined forward by an angle β of between 25 and 75° relative to a horizontal plane XY. This inclination allows the reinforcement to be positioned by the reinforcement only locally. This makes it possible to avoid stiffening the envelope in areas where flexibility is sought to facilitate the movement of the foot and in particular the rolling of the shoe. This improves ease of movement. The main axis 411 of this covering part can be coincident with or substantially parallel to the main axis of the flexible panel 26.

Dans cet exemple, au niveau de la jonction latérale 123L entre la tige 2 et la semelle externe 33, la partie de l'aile latérale 41 en regard du panneau souple 26 s'étend sur une portion de la jonction 123L comprise entre une première limite 1231 positionnée à une distance d'un huitième de la longueur L33 du semelage externe à partir de l'extrémité arrière 33R et une deuxième limite 1232 positionnée à une distance de la moitié de la longueur du semelage externe. Ce positionnement permet de s'assurer que l'aile latérale 41 du renfort 4 se situe en regard d'une zone du pied spécifique pour laquelle un support est nécessaire pour améliorer la stabilité du pied.In this example, at the level of the lateral junction 123L between the upper 2 and the outer sole 33, the part of the side wing 41 facing the flexible panel 26 extends over a portion of the junction 123L between a first limit 1231 positioned at a distance of one eighth of the length L33 of the outer sole from the rear end 33R and a second limit 1232 positioned at a distance of half the length of the outer sole. This positioning ensures that the lateral wing 41 of the reinforcement 4 is located opposite a specific area of the foot for which support is necessary to improve the stability of the foot.

Comme nous l'avons vu, la stabilité est apportée par le chevauchement entre le panneau souple inextensible 26 et l'aile latérale 41 du support 4. L'aile latérale 41 est fixée sur le panneau souple 26.As we have seen, stability is provided by the overlap between the inextensible flexible panel 26 and the side wing 41 of the support 4. The side wing 41 is fixed on the flexible panel 26.

Pour que le maintien latéral soit amélioré, il s'avère important d'avoir un support latéral en regard de l'articulation de Lisfranc ou articulation tarsométatarsienne du pied. Cette articulation de Lisfranc 5, dont l'interligne s'étend transversalement d'un bord à l'autre du pied, unit les trois cunéiformes et le cuboïde aux cinq métatarsiens. Lors d'une foulée, le pied pivote autour de cette articulation qui est, de fait, sensiblement sollicité. En l'absence de maintien, on a davantage de risques de tordre le pied. Aussi, selon un mode de réalisation avantageux, le panneau souple 26 et l'aile latérale 41 du support 4 sont agencés de sorte qu'une partie du panneau souple 26 et/ou de l'aile latérale 41 soit positionnée en regard de l'articulation de Lisfranc 5 ou articulation tarsométatarsienne du pied lorsque le pied est dans la chaussure. Ce positionnement est illustré à la figure 7. Cette construction se révèle particulièrement efficace pour prévenir des risques d'entorses externes de la cheville.For lateral support to be improved, it is important to have lateral support opposite the Lisfranc joint or tarsometatarsal joint of the foot. This Lisfranc 5 joint, whose space extends transversely from one edge of the foot to the other, unites the three cuneiforms and the cuboid to the five metatarsals. During a stride, the foot pivots around this joint which is, in fact, significantly stressed. In the absence of support, there is a greater risk of twisting the foot. Also, according to an advantageous embodiment, the flexible panel 26 and the side wing 41 of the support 4 are arranged so that a part of the flexible panel 26 and/or the side wing 41 is positioned facing the articulation of Lisfranc 5 or tarsometatarsal joint of the foot when the foot is in the shoe. This positioning is illustrated in Figure 7 . This construction is particularly effective in preventing the risk of external ankle sprains.

Selon un autre mode de réalisation, non représenté, le panneau souple inextensible 23 ne porte pas un organe de guidage 253 d'une portion d'un lacet 251 d'un système de serrage 25 de la chaussure. L'extrémité haute du panneau souple est alors directement fixée sur la tige, par exemple, par couture. Dans ce cas, le bord latéral de la subdivision avant 22F comprend une série de passants 252 disposés symétriquement à la série de passants 252 du bord médial de la subdivision avant 22F. Le système de serrage 25, ne comprend pas de passant associé au panneau extensible souple 23.According to another embodiment, not shown, the inextensible flexible panel 23 does not carry a guide member 253 of a portion of a lace 251 of a tightening system 25 of the shoe. The upper end of the flexible panel is then directly fixed to the rod, for example, by sewing. In this case, the lateral edge of the front subdivision 22F comprises a series of loops 252 arranged symmetrically to the series of loops 252 of the medial edge of the front subdivision 22F. The tightening system 25 does not include a loop associated with the flexible expandable panel 23.

Dans l'exemple décrit, la partie basse du renfort 4 est intercalée entre la couche d'amortissement 331 et une partie de la couche d'usure 332 du semelage externe 33. Selon un autre mode de réalisation, la partie basse du renfort 4 recouvre également une partie de la couche d'usure 332. Par exemple, le renfort peut couvrir complètement une portion de l'assemblage des couches d'amortissement 331 et d'usure 332 du semelage externe 33. Cette construction peut faciliter le procédé de fabrication du semelage externe 33, le renfort pouvant être rapporté après la réalisation de l'assemblage des couches d'amortissement 331 et d'usure 332.In the example described, the lower part of the reinforcement 4 is inserted between the damping layer 331 and part of the wear layer 332 of the outer sole 33. According to another embodiment, the lower part of the reinforcement 4 covers also a part of the wear layer 332. For example, the reinforcement can completely cover a portion of the assembly of the damping layers 331 and wear layers 332 of the external sole 33. This construction can facilitate the manufacturing process of the external sole 33, the reinforcement being able to be added after the assembly of the damping layers 331 and wear layers 332.

Selon un autre mode de réalisation, le panneau souple 26 se prolonge pour recouvrir également une partie du dessous du pied. Dans ce cas, le panneau souple 26 s'intercale entre la première de montage 32 et le semelage externe 33. Alternativement, le panneau souple 26 se prolonge davantage pour recouvrir également une partie médiale de l'enveloppe 21. Cette partie médiale du panneau souple 26 peut remonter jusqu'à la bordure latérale de la subdivision avant 22F et peut également porter un organe de guidage d'une portion d'un lacet d'un système de serrage 25 de la chaussure. Ainsi, le panneau souple peut former un « U ». La partie médiale du panneau souple 26 peut être fixer à l'enveloppe de la même manière la partie latérale du panneau souple, comme nous l'avons décrit précédemment. Selon un autre mode de réalisation, la chaussure peut comprendre deux panneaux souples distincts, chaque panneau étant respectivement fixer la partie latérale et la partie médiale de l'enveloppe 21. Selon une variante, la partie médiale du panneau souple 26 peut être recouverte par une aile médiale d'un renfort 4. Ainsi, le panneau souple et/ou le renfort sont construits symétriquement par rapport à un plan vertical central XZ, dans le sens que le panneau souple et/ou le renfort remontent de part et d'autre de l'enveloppe 21 de la tige 2. Le panneau souple et/ou le renfort ne sont pas nécessairement dimensionnés à l'identique au niveau de leur partie médiale et leur partie latérale.According to another embodiment, the flexible panel 26 extends to also cover part of the bottom of the foot. In this case, the flexible panel 26 is inserted between the mounting insole 32 and the external sole 33. Alternatively, the flexible panel 26 extends further to also cover a medial part of the envelope 21. This medial part of the flexible panel 26 can go up to the lateral edge of the front subdivision 22F and can also carry a member for guiding a portion of a lace of a tightening system 25 of the shoe. Thus, the flexible panel can form a “U”. The medial part of the flexible panel 26 can be fixed to the envelope in the same way as the lateral part of the flexible panel, as we described previously. According to another embodiment, the shoe may comprise two separate flexible panels, each panel being respectively fixing the lateral part and the medial part of the envelope 21. According to a variant, the medial part of the flexible panel 26 can be covered by a medial wing of a reinforcement 4. Thus, the flexible panel and/or the reinforcement are constructed symmetrically with respect to a central vertical plane XZ, in the sense that the flexible panel and/or the reinforcement rises on either side of the envelope 21 of the rod 2. The flexible panel and/or the reinforcement are not necessarily dimensioned identically at their medial part and their lateral part.

L'invention n'est pas limitée aux modes de réalisation précédemment décrits. Il est également possible de combiner ces modes de réalisation. L'invention s'étend à tous les modes de réalisation couverts par les revendications annexées.The invention is not limited to the embodiments previously described. It is also possible to combine these embodiments. The invention extends to all the embodiments covered by the appended claims.

Claims (15)

  1. Sports shoe (1) comprising:
    • an external bottom assembly (33) having a damping layer (331) extending over substantially the entire length (L33) of the external bottom assembly,
    • an upper (2) fixed to the external bottom assembly, the upper having
    ∘ an envelope (21) intended to surround part of the user's foot and
    ∘ an inextensible flexible panel (26) fixed to the envelope at a portion of the lateral join (123L) between the upper and the external sole,
    wherein the sports shoe moreover comprises a reinforcement (4) composed of a rigid plastics material having a Shore D hardness greater than 40, the reinforcement having a lateral wing (41) fixed to part of a lateral edge (3311) of the damping layer and to an external face (262) of the flexible panel.
  2. Sports shoe (1) according to Claim 1, characterized in that the flexible panel (26) and the lateral wing (41) of the support (4) are arranged such that part of the flexible panel and/or of the lateral wing is positioned facing the Lisfranc joint or tarsometatarsal joint of the foot when the foot is in the shoe.
  3. Sports shoe (1) according to either of the preceding claims, characterized in that the flexible panel comprises an upper end bearing a guide member (253) for a portion of a lace (251) of a tightening system (25) for tightening the shoe.
  4. Sports shoe (1) according to one of the preceding claims, characterized in that the reinforcement comprises a transverse arm (42) covering part of a bottom face (3312) of the damping layer (331), the transverse arm extending transversely over substantially the entire length (W33) of the external bottom assembly.
  5. Sports shoe (1) according to the preceding claim, characterized in that the transverse arm (42) is positioned, longitudinally, solely facing a transition zone (3313) of the bottom face (3312) of the damping layer located underneath the foot arch.
  6. Sports shoe (1) according to one of the preceding claims, characterized in that, at the lateral join (123L) between the upper and the external sole, that part of the lateral wing that faces the flexible panel extends over a portion of the lateral join between a first end (1231) positioned at a distance of one eighth of the length (L33) of the external bottom assembly from the rear end (33R) and a second end (1232) positioned at a distance of half the length of the external bottom assembly.
  7. Sports shoe (1) according to one of the preceding claims, characterized in that the flexible panel (26) is oriented along a main axis (261) inclined towards the front by an angle (α) between 25° and 75° in relation to a horizontal plane (XY), and in that that part of the lateral wing (41) that faces the flexible panel is oriented along a main axis (411) inclined towards the front by an angle (β) between 25° and 75° in relation to a horizontal plane (XY).
  8. Sports shoe (1) according to one of the preceding claims, characterized in that part of the lateral wing is adhesively bonded to the flexible panel.
  9. Sports shoe (1) according to one of the preceding claims, characterized in that the reinforcement (4) comprises a medial wing (43) fixed to at least part of a lateral edge (3312) of the damping layer.
  10. Sports shoe (1) according to one of the preceding claims, characterized in that the lateral wing covers at least one quarter of the height of the flexible panel.
  11. Sports shoe (1) according to one of the preceding claims, characterized in that the lateral wing does not rise above half the height of the upper.
  12. Sports shoe (1) according to one of the preceding claims, characterized in that the lateral wing is dimensioned such that the stiffness of the wing decreases with increasing distance away from the external bottom assembly.
  13. Sports shoe (1) according to one of the preceding claims, characterized in that the reinforcement is composed of a material from the following: a polyamide (PA), a thermoplastic polyurethane (TPU), a polyester (PE) or a composite material.
  14. Sports shoe (1) according to one of the preceding claims, characterized in that the flexible panel is fixed to the envelope over at least the bottom quarter of the height of the flexible panel.
  15. Sports shoe (1) according to one of the preceding claims, characterized in that the flexible panel is separate from the envelope over at least the top half of the height of the panel.
EP20020150.7A 2019-04-10 2020-04-02 Sport shoe Active EP3721738B1 (en)

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US11638461B2 (en) 2023-05-02
EP3721738A1 (en) 2020-10-14
FR3094872A1 (en) 2020-10-16
FR3094872B1 (en) 2021-03-19
US20200323309A1 (en) 2020-10-15

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