EP1844673B1 - Shock-absorber system for a shoe - Google Patents
Shock-absorber system for a shoe Download PDFInfo
- Publication number
- EP1844673B1 EP1844673B1 EP07006902.6A EP07006902A EP1844673B1 EP 1844673 B1 EP1844673 B1 EP 1844673B1 EP 07006902 A EP07006902 A EP 07006902A EP 1844673 B1 EP1844673 B1 EP 1844673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shoe according
- elastically deformable
- support elements
- sole
- support
- 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.)
- Not-in-force
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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
- A43B13/026—Composites, e.g. carbon fibre or aramid fibre; the sole, one or more sole layers or sole part being made of a composite
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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
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/12—Soles with several layers of different materials
-
- 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
- A43B13/16—Pieced 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
- A43B13/18—Resilient soles
- A43B13/181—Resiliency achieved by the structure of the sole
- A43B13/186—Differential cushioning region, e.g. cushioning located under the ball of the foot
-
- 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
- A43B13/18—Resilient soles
- A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials
- A43B13/188—Differential cushioning regions
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B21/00—Heels; Top-pieces or top-lifts
- A43B21/24—Heels; Top-pieces or top-lifts characterised by the constructive form
- A43B21/26—Resilient heels
Definitions
- the present invention relates to a damping system for a shoe and in particular for a sports shoe such as a walking shoe, running shoe, or other.
- the WO 98/07343 teaches a construction in which fluid-filled bag-shaped elements can deform in the three directions, that is to say both in a horizontal plane and in a vertical direction.
- the document US5784808 discloses the preamble of claim 1.
- the object of the present invention is to overcome the drawbacks of the prior art and to provide an improved damping device.
- One purpose is in particular to provide a damping device in three different directions, that is to say both in a horizontal plane and in a vertical direction.
- Another object of the present invention is to provide a damping device compatible with good grip and / or "handling".
- the shoe according to the invention which is of the type comprising a rod, surmounting an outer sole, in that the outer sole comprises at the heel at least two support elements of damping material, disposed respectively side lateral and medial assembly, that each element extends in a vertical direction substantially from an upper end to a lower outer end of the sole, that these support elements are deformable substantially independently of one another, and that the sole external member comprises an elastically deformable element comprising an upper part extending in the transverse direction of the sole assembly and covering the upper end of each of the support elements, and at least two lugs extending laterally and medially respectively and surrounding each of the support elements externally. substantially over the entire height of x thereof.
- This construction allows damping in all directions while ensuring good stability and grip of the shoe.
- the support elements will compress and absorb the energy thus produced. Because of their independence, and in particular because the support elements are not connected at their lower end by a common step sole, as in the known devices, the support elements will also deviate from each other relative to the longitudinal axis of the shoe and thus increase the support polygon. This necessarily results in increased stability of the shoe.
- the Figures 1 to 6 illustrate the construction and operation of a damping sole according to a first embodiment of the invention in a sports shoe 1.
- the 1 represented athletic shoe is a running shoe, but could be a very different type of athletic shoe.
- This shoe 1 is represented in perspective, seen from below in the figure 1 . It comprises a rod 2, which overcomes an outer sole 10.
- the rod 2 will not be described in detail below, the other figures simply showing the outer sole.
- outer soleing 10 is meant the sole portion disposed outside the rod 2, this outer sole 10 does not include the soleing parts such as insole, sockliner, or sole or Strobel sole assembly, which are linked to the rod 2 and / or disposed inside thereof.
- the rod 2 is fixed to the outer sole 10 in any way known per se and in particular by gluing.
- the outer soleing 10 comprises from the top to the bottom an upper damping layer 20, an elastically deformable element 30, several damping support elements 40 and a contact layer 50 (not shown in FIG. figure 2 for the sake of clarity).
- the upper damping layer 20 extends substantially the entire length of the sole 10, that is to say from the rear end to the front end thereof, and has two parts, respectively before 21 and back 22, of substantially uniform thickness.
- the front portion 21 has a greater thickness than the rear portion 22, for example of the order of 4 to 15 mm.
- the rear portion 22 has a thickness for example of the order of 3 to 10 mm.
- the front portion 21 ends in the direction of the rear by a chevron shaped portion 23, forming a step relative to the rear portion 22 and whose role will be explained later.
- any other form may be provided, for example vague, ... etc.
- the upper portion 24 of the upper damping layer 20 is substantially flat or adapted to the shape of the rod.
- the elastically deformable element 30 has at the heel part shaped cup 31, ie a portion having a relatively flat bottom 31 conforming to the shape of the damping upper layer 20 and having edges 31b rising up along the rod or edges 25 of the upper damping layer 20
- the cup-shaped portion 31 furthermore has tabs 33, in this case in the example shown two lateral tabs 34, two medial tabs 35 and a rear tab 36 intended to cooperate with the support elements as well as the will see further.
- the number of legs can be different depending on the desired result.
- Each tab 34, 35, 36 extends from the rear bowl 30, downwards and ends with a return respectively 34a, 35a, 36a intended to be interposed between the damping support members 40 and the contact layer 50.
- returns 34a, 35a, 36a are essentially intended to ensure good bonding between the tabs 34, 35, 36 and the contact layer 50, as well as the support elements 40. These returns can optionally be removed.
- the lugs 34, 35, 36 have a relatively flat shape and have a slightly inclined cross-sectional shape in relation to the vertical direction V (cf. figure 4 ), flaring towards the end of the sole, from top to bottom.
- these lugs 34, 35, 36 have a slightly triangular shape tapering downwards.
- Other shapes may also be provided depending on the role of the elastic element.
- these tabs may have a wavy shape, instead of flat, so as to favor damping in the vertical direction. It can also be envisaged that the tabs extend only over part of the height of the blocks.
- the elastically deformable element is extended forward by two flat tabs 37 whose operation will be explained later.
- This element 30 is made of a relatively rigid and elastic material and having in particular a Young's modulus greater than 40 MPa. It can be made of synthetic or composite material, such as TPU, PE, filled or unheated polyamide, polyester elastomer (hytrel), PEBA, composite based on carbon fiber / resin, etc.
- the damping upper layer 20 is made of EVA or PU foam with a hardness greater than 20 Asker C.
- the damping support elements 40 consist of blocks of damping materials disposed between the elastically deformable element 30 and the contact layer 50.
- these support elements are independent and are three in number, namely a medial block 41, that is to say placed on one medial side of the shoe, two lateral blocks 42, 43, that is to say placed lateral side of the shoe.
- the medial block 41 has a slightly arched shape so as to follow the contour of the sole and extends substantially over the entire length of the heel area of the sole. This medial block 41 cooperates with the two medial tabs 35 of the elastically deformable element 30.
- the most forward side block 42 has a substantially parallelepipedal shape and cooperates with a single lateral tab 34 of the elastically deformable element 30
- the rearmost side block 43 extends both from the lateral side and over a portion of the rear of the heel and cooperates with two respectively lateral 34 and rear 36 tabs of the deformable elastic element.
- the number of legs can be different for each block.
- This lateral block 43 also has an arcuate shape so as to match the contour of the heel.
- the lateral block 43 has substantially the same length as the medial block 41, but it could also be of different length and for example the medial block 41 could be longer.
- the two lateral blocks 42, 43 are separated by a slot-shaped space 46 substantially perpendicular to the edge of the sole assembly, while the medial 41, lateral 43 blocks are separated by a slot-shaped space 47 also substantially perpendicular to the edge or contour in the area under consideration.
- These support blocks 41, 42, 43 are assembled to the elastically deformable element independently of each other by their upper end respectively 41a, 42a, 43a.
- the medial block 41 extends towards the front of the shoe, that is to say beyond the arch of the foot, by a damping layer 44 of slightly lower thickness and terminating in a shape.
- triangle or chevron 44d complementary to that of the front portion 21 of the upper damping layer 20 so as to provide a form connection between these two layers.
- the thickness of the layer 44 corresponds to that of the step 23 of the chevron.
- blocks 41, 42, 43 are made of elastomerized EVA foam, or PU foam of Asker C hardness.
- Such foams have in fact a damping and elastic behavior. According to the case of the more damping foams, such as non-elastomerized EVA foam may be provided.
- the blocks have a thickness in the vertical direction of 10 to 30 mm and for example of the order of 20 mm.
- the elements 30 and 40 are pre-assembled in a subassembly 60 before assembly to the damping layer 20 to form the sole 10.
- the arms 37 are housed in the recesses 27 of the layer 20 to consolidate the assembly.
- each block 41, 42, 43 is provided with one or two recesses or disbursements respectively 41c, 42c 43c to receive the associated tab 34, 35, 36 of the elastically deformable element 30.
- these recesses have complementary shapes of those of the associated legs.
- these recesses could also be removed.
- the contact layer 50 consists of elements, respectively rear medial 51, lateral rear 52, 53 and front 54, intended to be fixed on the lower ends respectively 41b, 42b, 43b and 44b of the support blocks respectively 41, 42, 43 and damping layers respectively 44 and 21.
- This contact layer 50 is made of a material that is resistant to wear and has adhesion characteristics, such as rubber, TPU, EVA foam with high abrasion resistance, the latter two materials having the advantage of being more light as rubber. Depending on the case and depending on the material used for the support blocks and / or damping layer, this contact layer 50 can be reduced or eliminated.
- an elastically deformable but structurally rigid element and damping support blocks ensures good damping in all directions, i.e., three-dimensional damping, due to the independence of said blocks. damping 40, while ensuring the stability of the assembly through the elastic member 30. Moreover because of the different shapes of the blocks 41, 42, 43 and different numbers / shapes of legs per associated block, the characteristics of damping of the blocks can be dissociated, on the one hand, between blocks and, on the other hand, between vertical and horizontal directions. The operation of the whole is particularly illustrated on Figures 4 to 6 .
- the figure 4 illustrates the sole assembly 10 according to the invention laid flat on a floor "S", in the absence of any effort.
- the support blocks 40, and in particular 41, 43 define a levitation polygon "P" having a width "1".
- the support blocks 40 When a force "F" is applied on the sole in a substantially vertical direction, the support blocks 40 will deform, move away from each other, by constraining the elastic element 30, and define a new polygon of greater levitation, since of width "L" superior to that "1" of the previous polygon. In other words the perimeter of the support zone is larger and the stability at the level of the soleing is increased.
- the elastically deformable element 30 will exert a return force and tend to bring back the support blocks 40 to the initial position shown in FIG. figure 4 .
- the heel support block 43 which will be first requested, since the first to be in contact with the ground, then according to the morphology of the user (pronator, supinator), it will be the lateral block 42 or medial 41, which will come into contact with the ground, then the opposite block causing the spacing of blocks 41, 42.
- the support blocks 40 can thus deform independently of each other to adapt to the movement of the foot or to the terrain configuration. So in the case of Figures 6 and 6a , only the support block 43 and the associated tab 34 deform under the effect of a pebble "P". It will be noted that this isolated deformation of the support block 43 is in this case made possible by the legs that are also deformable independently of one another, of the elastically deformable element 30.
- the construction according to the invention is therefore particularly advantageous for use in the field. furniture with irregularities.
- the main difference lies in the fact that the damping support blocks 141, 142, 143 are connected together by a web of material 147.
- This web of material is very thin. the order of 3 to 10 mm with respect to the support blocks 141, 142, 143, they are always free to move independently of each other. On the other hand, the fact that they are thus united facilitates their assembly.
- the medial support block 141 is made of a material similar to the rest of the assembly 140, for example EVA foam, but of greater hardness between 50 and 65 Asker C for example. It also extends on the part 144 by a portion 144a of the same hardness. It can also be in a different material, the purpose of this block 141 is to be a little harder (therefore less damping compared to other blocks). This function is also related to the pronator / supinator type of the shoe.
- the damping support elements 241, 242, 243 of the outer sole are also assembled in a single block 240.
- the element 240 extends here into the area of metatarsophalangeal articulation and is therefore longer.
- the thickened portion 221 of the damping layer 220 is reduced accordingly and extends only from the front of the sole to the metatarsophalangeal joint area (defined in this case by the step 223).
- the elastically deformable element 230 has two elongated horizontal arms 237 forwards, forming a kind of fork.
- These elongate arms 237 thus extend into the region of metatarsophalangeal articulation represented by the boundaries 223, 244d and make it possible to provide additional elastic recovery to the sole assembly in the front zone thereof.
- these arms 237 each comprise a tab 238 similar to the tabs 234, 235, 236 and extending substantially vertically along the front portion 244 of the support block 240.
- the arms 237 and lugs 238 of the elastically deformable element 230 are housed in associated recesses 244e, 244f of the support block, these recesses having complementary shapes and being formed respectively on the upper face and the sides of the front portion 244 of said support block 240.
- the sole assembly always comprises at least two support elements but additional return / stabilization means are also provided.
- the assembly 310 thus comprises at least two independent damping support elements 341, 343 covered externally substantially over their entire height by an elastically deformable element 330 and provided with a tread or contact layer 350.
- the support elements 341, 343, while remaining independent, are connected by a web of material 347 in the same material as the support elements 341, 343, to facilitate the assembly of the sole and which also allows some elastic return of the support elements 341, 343, 342 (not visible in the drawing) towards each other after crushing.
- the contact layer 350 is also provided so as to connect the various support blocks 341, 342, 343, and thus comprises a web of material 355 connecting these different elements at their lower end.
- the contact layer 350 being made of a highly elastic material such as rubber or any elastomerized material, allows a return effect of the sole assembly to the very interesting original position.
- this rubber veil 355 prevents up to 5mm of residual spacing of the studs after returning to the original position.
- This rubber web 355 (or other material) can be provided alone ie independently of web 347.
- the figure 13 illustrates a similar embodiment which is not part of the present invention in which only the rubber web 455 is provided.
- the space 460 between two support members 441, 443, 442 is filled with a material 461 such as EVA, PU, gel, intended to avoid the presence of a hole 455.
- This space 460 can be filled by localized extensions and smaller section of the material of the support members 441, 442, 443 as defined for example by the branches 355a, 355b, 355c of the figure 16 (see below the figure 13 being then considered as a sectional view according to XIII-XIII of the figure 16 ), or the branches 355d, 355e of the figure 17 .
- the space 560 between two support members 541, 543, 542 is filled with a material 561 such as EVA, PU, gel.
- a cavity 548 is formed between the deformable elastic element 530 and said support elements 541, 543, 542, so as to preserve the independence of said support elements and a web of material 547 in the same material as the support elements 542, 543 , 541 subsists between them.
- a resilient biasing member 647 extending substantially horizontally is interposed between the support members 641, 643, 642 (not shown in the drawing) in the same way as in the case of the figure 8 .
- this return element 647 is in this case in another material and is for example elastomeric rubber.
- This element is also disposed substantially in the middle part, in the vertical direction of the support blocks.
- FIGS 16 and 17 show different embodiments of the underside of the sole assembly in the case of the figure 12 (but also Figures 13 to 14 ), that is to say in the case where the contact layer 350 comprises a web of material 355 between two support blocks 341, 342, 343 to allow an elastic return of these blocks towards each other.
- the material web 355 comprises 3 substantially similar branches respectively 355a, 355b, 355c, each extending from a support block respectively 342, 343, 341 and joining together forming a star.
- the material web 355 comprises only two branches respectively 355d, 355e each connecting two support blocks to each other and respectively blocks 342, 341 and blocks 343, 341.
- Figures 16 and 17 can also be applied to the embodiment of the figure 15 in this case it is the return element 647 which has a shape in three branches 355a, 355b, 355c or in two branches between the support blocks.
- branches 355a, 355b, 355c or 355d, 355e can be modified and be for example four or more, or less.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
La présente invention concerne un système d'amortissement pour une chaussure et notamment pour une chaussure de sport telle qu'une chaussure de marche, course à pied, ou autre.The present invention relates to a damping system for a shoe and in particular for a sports shoe such as a walking shoe, running shoe, or other.
Il existe une énorme quantité de systèmes d'amortissement pour les chaussures de sport, ces systèmes étant destinés à amortir les forces de réaction provenant du sol au cours du cycle de marche, course, ou lors des déplacements.There is a huge amount of cushioning for sports shoes, these systems being designed to cushion the reaction forces from the ground during the cycle of walking, running, or traveling.
Traditionnellement ces dispositifs d'amortissement sont conçus pour amortir les efforts de réaction se produisant principalement perpendiculairement à la surface du sol, c'est-à-dire principalement en direction verticale. En effet les efforts de réaction se produisant selon cette direction sont traditionnellement considérés comme les plus importants. Ces efforts de réaction verticaux sont donc en général amortis par la simple prévision d'un bloc de mousse, généralement en EVA, déformable en direction verticale. D'autres moyens mettant en oeuvre des poches remplies de fluide ou de gaz sont également prévus.Traditionally these damping devices are designed to damp the reaction forces occurring mainly perpendicular to the ground surface, that is to say mainly in the vertical direction. Indeed the reaction efforts occurring in this direction are traditionally considered the most important. These vertical reaction forces are therefore generally damped by the mere provision of a block of foam, usually EVA, deformable in the vertical direction. Other means using pockets filled with fluid or gas are also provided.
Plus récemment, on s'est intéressé aux efforts de réaction du sol se produisant non pas dans une direction verticale, mais dans le plan du sol, que nous appellerons ici plan horizontal.More recently, we have been interested in the response of the soil occurring not in a vertical direction, but in the plane of the ground, which we will call here horizontal plane.
Selon le type de sport pratiqué, ces efforts horizontaux sont plus ou moins importants. Par exemple dans les sports tels que le tennis ou le basket-ball, où de nombreux déplacements s'effectuent latéralement, les forces de réaction s'effectuant au niveau du plan du sol peuvent être très élevées.Depending on the type of sport practiced, these horizontal efforts are more or less important. For example, in sports such as tennis or basketball, where there are many lateral movements, the reaction forces at the ground plane can be very high.
On s'est également rendu compte que les forces de réaction horizontale se produisant lors de la course à pied sur de l'asphalte sont plus élevées, car le coefficient de frottement élevé de ce matériau (asphalte) stoppe tout mouvement horizontal relatif de la semelle par rapport au sol, ce qui n'est pas le cas lors de la course sur terrain plus meuble, où des mouvements relatifs sol/semelle peuvent se produire.It has also been found that the horizontal reaction forces occurring during running on asphalt are higher because the high coefficient of friction of this material (asphalt) stops any relative horizontal movement of the sole. compared to the ground, which is not the case during the race on soft ground, where relative ground / sole movements can occur.
Cette constatation a donné lieu à des nouvelles constructions de chaussures dans lesquelles les dispositifs d'amortissement des semelles sont conçus de façon à permettre un certain mouvement relatif de la semelle par rapport au sol, et/ou des mouvements de cisaillement au sein de la semelle elle-même, de façon à absorber les efforts se produisant dans un plan essentiellement horizontal et à reproduire les effets de la course sur terrain meuble.This finding has resulted in new shoe constructions in which the soles cushioning devices are designed to allow some relative movement of the soleplate relative to the ground, and / or shearing movements within the soleplate. itself, so as to absorb the efforts occurring in an essentially horizontal plane and to reproduce the effects of the race on soft ground.
De telles constructions sont connues par exemple par le
Ces documents enseignent généralement de n'avoir un amortissement que dans le seul plan horizontal.These documents usually teach that you only have depreciation in the horizontal plane.
Le
Le problème d'une telle construction est que les déformations dans l'une quelconque des directions sont homogènes. Il n'est donc pas possible de différencier/dissocier l'amortissement en direction verticale et en direction horizontale.The problem of such a construction is that the deformations in any of the directions are homogeneous. It is therefore not possible to differentiate / dissociate the damping in the vertical direction and in the horizontal direction.
Un autre problème général auquel sont confrontés tous les dispositifs d'amortissement, est de concilier amortissement et stabilité/accroche du pied sur le terrain, ces fonctions étant plus ou moins incompatibles.Another general problem that all the damping devices face is to reconcile damping and stability / grip of the foot in the field, these functions being more or less incompatible.
Le but de la présente invention est de remédier aux inconvénients de l'art antérieur et de fournir un dispositif d'amortissement amélioré.The object of the present invention is to overcome the drawbacks of the prior art and to provide an improved damping device.
Un but est notamment de fournir un dispositif d'amortissement selon trois directions différentes, c'est-à-dire à la fois selon un plan horizontal et selon une direction verticale.One purpose is in particular to provide a damping device in three different directions, that is to say both in a horizontal plane and in a vertical direction.
Un autre but de la présente invention est de fournir un dispositif d'amortissement compatible avec une bonne accroche et/ou "tenue de route".Another object of the present invention is to provide a damping device compatible with good grip and / or "handling".
Ce ou ces buts sont atteints dans la chaussure selon l'invention qui est du type comportant une tige, surmontant un semelage externe, par le fait que le semelage externe comporte au niveau du talon au moins deux éléments supports en matériau amortissant, disposés respectivement côté latéral et médial du semelage, que chaque élément s'étend en direction verticale sensiblement depuis une extrémité supérieure jusqu'à une extrémité extérieure inférieure de semelage, que ces éléments supports sont déformables sensiblement indépendamment l'un de l'autre, et que le semelage externe comporte un élément élastiquement déformable comportant une partie supérieure s'étendant en direction transversale du semelage et recouvrant l'extrémité supérieure de chacun des éléments supports, et au moins deux pattes s'étendant respectivement latéralement et médialement et venant ceinturer extérieurement chacun des éléments support sensiblement sur toute la hauteur de ceux-ci.This or these goals are achieved in the shoe according to the invention which is of the type comprising a rod, surmounting an outer sole, in that the outer sole comprises at the heel at least two support elements of damping material, disposed respectively side lateral and medial assembly, that each element extends in a vertical direction substantially from an upper end to a lower outer end of the sole, that these support elements are deformable substantially independently of one another, and that the sole external member comprises an elastically deformable element comprising an upper part extending in the transverse direction of the sole assembly and covering the upper end of each of the support elements, and at least two lugs extending laterally and medially respectively and surrounding each of the support elements externally. substantially over the entire height of x thereof.
Cette construction permet un amortissement dans toutes les directions tout en garantissant une bonne stabilité et accroche de la chaussure.This construction allows damping in all directions while ensuring good stability and grip of the shoe.
En effet en cas d'effort dirigé essentiellement verticalement, les éléments supports vont se comprimer et absorber l'énergie ainsi produite. Du fait de leur indépendance, et notamment du fait que les éléments supports ne sont pas reliés à leur extrémité inférieure par une semelle de marche commune, comme dans les dispositifs connus, les éléments supports vont également s'écarter l'un de l'autre par rapport à l'axe longitudinal de la chaussure et augmenter ainsi le polygone de sustentation. Il en résulte nécessairement une stabilité accrue de la chaussure.Indeed, in the case of a force directed essentially vertically, the support elements will compress and absorb the energy thus produced. Because of their independence, and in particular because the support elements are not connected at their lower end by a common step sole, as in the known devices, the support elements will also deviate from each other relative to the longitudinal axis of the shoe and thus increase the support polygon. This necessarily results in increased stability of the shoe.
De toute façon l'invention sera mieux comprise et d'autres caractéristiques de celle-ci seront mises en évidence à l'aide de la description qui suit en référence aux dessins schématique annexé qui en représente à titre d'exemple non limitatif plusieurs modes de réalisation et dans lequel :
- la
figure 1 est une vue en perspective de dessous d'une chaussure comportant un semelage amortissant selon l'invention, - la
figure 2 est une vue en perspective éclatée du semelage selon l'invention, sans la couche de contact, - la
figure 3 est une vue de profil de la partie arrière du semelage de lafigure 1 , - les
figures 4 et 5 sont des vues schématiques en coupe transversale illustrant le fonctionnement du semelage en cas d'effort vertical, - la
figure 6 est une vue similaire auxfigures 4 et 5 illustrant la déformation du semelage en cas d'irrégularité du terrain, - la
figure 6a est une vue de côté de lafigure 6 , - la
figure 7 est une vue similaire à lafigure 2 selon un second mode de réalisation, qui ne fait pas partie de la présente invention - les
figures 8 et 9 sont des vues similaires auxfigures 3 et 4 concernant le second mode de réalisation, qui ne fait pas partie de la présente invention - la
figure 10 est une vue similaire à lafigure 2 d'un semelage selon un troisième mode de réalisation, qui ne fait pas partie de la présente invention - la
figure 11 est une vue en coupe selon XI-XI de lafigure 10 , - la
figure 12 est une vue similaire à lafigure 4 concernant un quatrième mode de réalisation, qui ne fait pas partie de la présente invention - la
figure 13 est une vue similaire à lafigure 4 concernant un cinquième mode de réalisation, qui ne fait pas partie de la présente invention - la
figure 14 est une vue similaire à lafigure 4 concernant un sixième mode de réalisation, qui ne fait pas partie de la présente invention - la
figure 15 est une vue similaire à lafigure 4 concernant un septième mode de réalisation, qui ne fait pas partie de la présente invention - les
figures 16 et 17 sont des vues de dessous d'un semelage selon respectivement un huitième et un neuvième mode de réalisation. qui ne fait pas partie de la présente invention
- the
figure 1 is a perspective view from below of a shoe comprising a damping sole according to the invention, - the
figure 2 is an exploded perspective view of the assembly according to the invention, without the contact layer, - the
figure 3 is a profile view of the rear part of the sole of thefigure 1 , - the
Figures 4 and 5 are schematic views in cross-section illustrating the operation of the sole assembly in the event of vertical force, - the
figure 6 is a view similar toFigures 4 and 5 illustrating the deformation of the sole in case of irregularity of the ground, - the
figure 6a is a side view of thefigure 6 , - the
figure 7 is a view similar to thefigure 2 according to a second embodiment, which does not form part of the present invention - the
Figures 8 and 9 are similar views toFigures 3 and 4 concerning the second embodiment, which does not form part of the present invention - the
figure 10 is a view similar to thefigure 2 of a soleing according to a third embodiment, which does not form part of the present invention - the
figure 11 is a sectional view according to XI-XI of thefigure 10 , - the
figure 12 is a view similar to thefigure 4 relating to a fourth embodiment, which does not form part of the present invention - the
figure 13 is a view similar to thefigure 4 concerning a fifth embodiment, which does not form part of the present invention - the
figure 14 is a view similar to thefigure 4 concerning a sixth embodiment, which does not form part of the present invention - the
figure 15 is a view similar to thefigure 4 concerning a seventh embodiment, which does not form part of the present invention - the
Figures 16 and 17 are bottom views of a sole according to respectively an eighth and a ninth embodiment. which is not part of the present invention
Les
Par semelage externe 10 on entend la partie de semelage disposée à l'extérieur de la tige 2, ce semelage externe 10 ne comprend pas les parties de semelage telles que semelle interne, semelle de propreté, ou semelle Strobel ou première de montage, qui sont liées à la tige 2 et/ou disposées à l'intérieur de celle-ci. La tige 2 est fixée au semelage externe 10 de toute façon connue en soi et notamment par collage.By
Ainsi que le montrent plus particulièrement les
La couche amortissante supérieure 20 s'étend sensiblement sur toute la longueur du semelage 10, c'est-à-dire depuis l'extrémité arrière jusque vers l'extrémité avant de celui-ci, et comporte deux parties, respectivement avant 21 et arrière 22, d'épaisseur sensiblement uniforme. La partie avant 21 a une épaisseur plus importante que la partie arrière 22, par exemple de l'ordre de 4 à 15 mm. La partie arrière 22 a une épaisseur par exemple de l'ordre de 3 à 10 mm. Dans l'exemple représenté, la partie avant 21 se termine en direction de l'arrière par une partie en forme de chevron 23, formant une marche par rapport à la partie arrière 22 et dont le rôle sera expliqué plus loin. Bien entendu, au lieu du chevron 23, toute autre forme peut être prévue, par exemple vague,...etc. La partie supérieure 24 de la couche amortissante supérieure 20 est sensiblement plane ou adaptée à la forme de la tige. Elle peut également présenter des bords 25 sensiblement verticaux destinés à remonter le long de la tige 2, ces bords 25 sont plus élevés dans la zone arrière, et notamment talon, et l'élément élastiquement déformable 30 comporte au niveau du talon une partie en forme de cuvette 31, c'est-à-dire une partie ayant un fond 31 a relativement plat épousant la forme de la couche supérieure amortissante 20 et comportant des bords 31b remontant le long de la tige ou des bords 25 de la couche amortissante supérieure 20. La partie en forme de cuvette 31 comporte par ailleurs des pattes 33, en l'occurrence dans l'exemple représenté deux pattes 34 latérales, deux pattes 35 médiales et une patte 36 arrière destinées à coopérer avec les éléments supports ainsi qu'on le verra plus loin. Bien entendu le nombre de pattes peut être différent en fonction du résultat recherché.The upper damping
Chaque patte 34, 35, 36 s'étend depuis la cuvette arrière 30, jusque vers le bas et se termine par un retour respectivement 34a, 35a, 36a destiné à être interposé entre les éléments supports amortissant 40 et la couche de contact 50. Ces retours 34a, 35a, 36a sont essentiellement destinés à garantir un bon collage entre les pattes 34, 35, 36 et la couche de contact 50, ainsi que les éléments supports 40. Ces retours peuvent éventuellement être supprimés.Each
Dans l'exemple représenté les pattes 34, 35, 36 ont une forme relativement plane et ont en section transversale du semelage une forme légèrement inclinée par rapport à la direction verticale V (cf.
Par ailleurs, ainsi que le montrent les
L'élément élastiquement déformable se prolonge vers l'avant par deux pattes planes 37 dont le fonctionnement sera expliqué ultérieurement. Cet élément 30 est en un matériau relativement rigide et élastique et ayant notamment un module d'Young supérieur à 40 MPa. Il peut être en matériau synthétique ou composite, tel que TPU, PE, polyamide chargé ou non, polyester élastomère (hytrel), PEBA, composite à base de fibre de carbone/résine,...etc.The elastically deformable element is extended forward by two
La couche supérieure amortissante 20 est en mousse EVA ou PU, de dureté supérieure à 20 Asker C.The damping
Les éléments de support amortissant 40 sont constitués par des blocs de matériaux amortissants, disposés entre l'élément élastiquement déformable 30 et la couche de contact 50.The damping
Dans le premier exemple de réalisation, ces éléments supports sont indépendants et sont au nombre de trois, à savoir un bloc médial 41, c'est-à-dire disposé d'un côté médial de la chaussure, deux blocs latéraux 42, 43, c'est-à-dire disposés côté latéral de la chaussure. Le bloc médial 41 a une forme légèrement arquée de façon à suivre le contour du semelage et s'étend sensiblement sur toute la longueur de la zone talon du semelage. Ce bloc médial 41 coopère avec les deux pattes médiales 35 de l'élément élastiquement déformable 30. Le bloc latéral 42 situé le plus à l'avant a une forme sensiblement parallélépipédique et coopère avec une seule patte latérale 34 de l'élément élastiquement déformable 30. Le bloc latéral 43 situé le plus à l'arrière s'étend à la fois côté latéral et sur une partie de l'arrière du talon et coopère avec deux pattes respectivement latérale 34 et arrière 36 de l'élément élastique déformable. Bien entendu, le nombre de pattes peut être différent pour chaque bloc.In the first embodiment, these support elements are independent and are three in number, namely a
Ce bloc latéral 43 a également une forme en arc de cercle de façon à épouser le contour du talon.This
Dans le mode de réalisation, le bloc latéral 43 a sensiblement la même longueur que le bloc médial 41, mais il pourrait également être de longueur différente et par exemple le bloc médial 41 pourrait être plus long. Les deux blocs latéraux 42, 43 sont séparés par un espace en forme de fente 46 sensiblement perpendiculaire au bord du semelage, tandis que les blocs médial 41, latéral 43 sont séparés par un espace 47 en forme de fente également sensiblement perpendiculaire au bord ou contour du semelage dans la zone considérée.In the embodiment, the
Ces blocs supports 41, 42, 43 sont assemblés à l'élément élastiquement déformable indépendamment les uns des autres par leur extrémité supérieure respectivement 41 a, 42a, 43a. Dans l'exemple représenté le bloc médial 41 se prolonge vers l'avant de la chaussure, c'est-à-dire au delà de la voûte plantaire, par une couche amortissante 44 d'épaisseur légèrement inférieure et se terminant par une forme en triangle ou chevron 44d complémentaire de celle de la partie avant 21 de la couche amortissante supérieure 20 de façon à assurer une liaison de forme entre ces deux couches. Bien entendu d'autres formes peuvent être prévues. L'épaisseur de la couche 44 correspond à celle de la marche 23 du chevron. En pratique les blocs 41, 42, 43 sont en mousse EVA élastomérisée, ou mousse PU de dureté à 20 Asker C. De telles mousses ont en effet un comportement à la fois amortissant et élastique. Selon le cas des mousses plus amortissantes, telles que mousse EVA non élastomérisée peuvent être prévues. Dans l'exemple représenté les blocs ont une épaisseur en direction verticale de 10 à 30 mm et par exemple de l'ordre de 20 mm.These support blocks 41, 42, 43 are assembled to the elastically deformable element independently of each other by their upper end respectively 41a, 42a, 43a. In the example shown, the
Les éléments 30 et 40 sont pré assemblés en un sous ensemble 60 avant assemblage à la couche amortissante 20 pour former le semelage 10. Les bras 37 se logent dans des évidements 27 de la couche 20 pour consolider l'assemblage.The
Comme le montre également bien la
Selon le mode réalisation, ces évidements pourraient également être supprimés.According to the embodiment, these recesses could also be removed.
La couche de contact 50 est constituée d'éléments, respectivement arrière médial 51, arrière latéral 52, 53 et avant 54, destinés à être fixés sur les extrémités inférieures respectivement 41b, 42b, 43b et 44b des blocs supports respectivement 41, 42, 43 et des couches amortissantes respectivement 44 et 21.The
Cette couche de contact 50 est en un matériau résistant à l'usure et présentant des caractéristiques d'adhérence, tel que caoutchouc, TPU, mousse EVA à haute résistance à l'abrasion, ces deux derniers matériaux ayant l'avantage d'être plus légers que le caoutchouc. Selon le cas et en fonction du matériau utilisé pour les blocs supports et/ou couche amortissante, cette couche de contact 50 peut être diminuée, voire être supprimée.This
La combinaison d'un élément 30 élastiquement déformable, mais structurellement rigide et de blocs de supports amortissants 40 permet de garantir un bon amortissement dans toutes les directions, c'est-à-dire un amortissement tridimensionnel, du fait de l'indépendance desdits blocs amortissants 40, tout en garantissant la stabilité de l'ensemble grâce à l'élément élastique 30. Par ailleurs du fait des formes différentes des blocs 41, 42, 43 et du nombres/formes différentes de pattes par bloc associé, les caractéristiques d'amortissement des blocs peuvent être dissociées, d'une part, entre blocs et, d'autre part, entre directions verticales et horizontales. Le fonctionnement de l'ensemble est particulièrement illustré sur les
La
Lorsqu'un effort "F" est appliqué sur le semelage dans une direction sensiblement verticale, les blocs supports 40 vont se déformer, s'écarter les uns par rapport aux autres, en contraignant l'élément élastique 30, et définir un nouveau polygone de sustentation plus grand, puisque de largeur "L" supérieure à celle "1" du précédent polygone. En d'autres termes le périmètre de la zone d'appui est plus grand et la stabilité au niveau du semelage est accrue.When a force "F" is applied on the sole in a substantially vertical direction, the support blocks 40 will deform, move away from each other, by constraining the
Dès que l'effort "F" sera relâché, l'élément élastiquement déformable 30 va exercer un effort de rappel et tendre à ramener les blocs supports 40 dans la position initiale montrée à la
Du fait de leur indépendance, les blocs supports 40 peuvent donc se déformer indépendamment les uns des autres pour s'adapter au mouvement du pied ou à la configuration du terrain. Ainsi dans le cas des
Les
Dans ce mode de réalisation, qui ne fait pas partie de la présente invention la différence principale réside dans le fait que les blocs supports amortissants 141, 142, 143 sont reliés ensemble par un voile de matière 147. Ce voile de matière étant très fin de l'ordre de 3 à 10 mm par rapport aux blocs supports 141, 142, 143, ceux-ci sont toujours libres de se déplacer indépendamment les uns des autres. Par contre le fait qu'ils soient ainsi réunis facilite leur assemblage.In this embodiment, which is not part of the present invention, the main difference lies in the fact that the damping support blocks 141, 142, 143 are connected together by a web of
Par ailleurs, lorsqu'un effort "F" est exercé sur le semelage externe 110 et que celui-ci s'écrase sous l'effet de celui-ci comme indiqué à la
Afin de permettre cet effet de retour élastique du voile 147, celui-ci n'est pas collé à l'élément élastiquement déformable 130 et est au contraire séparé de celui-ci par une cavité 148.In order to allow this elastic return effect of the
Une autre différence entre ces modes de réalisation est que le bloc amortissant 141, 142, 143, 144 forme une seule pièce.Another difference between these embodiments is that the damping
Enfin le bloc support médial 141 est en un matériau similaire au reste de l'ensemble 140, par exemple mousse EVA, mais de plus grande dureté entre 50 et 65 Asker C par exemple. Il se prolonge également sur la partie 144 par une partie 144a de même dureté. Il peut être également en un matériau différent, le but de ce bloc 141 est d'être un peu plus dur (donc moins amortissant par rapport aux autres blocs). Cette fonction est également liée au type pronateur/supinateur de la chaussure.Finally, the
Dans l'exemple de réalisation montré sur les
Dans ce cas, les éléments supports amortissants 241, 242, 243 du semelage externe sont également rassemblés en un seul bloc 240. Par rapport aux cas précédents où l'élément 40, 140 s'arrêtait peu après la voûte plantaire, l'élément 240 s'étend ici jusque dans la zone d'articulation métatarsophalangienne et est donc plus long.In this case, the damping
La partie en surépaisseur 221 de la couche amortissante 220 est réduite en conséquence et ne s'étend que de l'avant de la semelle jusqu'à la zone d'articulation métatarsophalangienne (définie en l'occurrence par la marche 223). Par ailleurs l'élément élastiquement déformable 230 présente vers l'avant deux bras allongés 237 horizontaux, formant une sorte de fourche.The thickened
Ces bras allongés 237 s'étendent donc jusque dans la zone d'articulation métatarsophalangienne figurée par les limites 223, 244d et permettent de fournir une restitution élastique supplémentaire au semelage dans la zone avant de celui-ci. Par ailleurs ces bras 237 comportent chacun une patte 238 similaire aux pattes 234, 235, 236 et s'étendant sensiblement verticalement le long de la partie avant 244 du bloc support 240.These
Ces pattes verticales 238 ont de même que les pattes 234, 235, 236, un rôle de stabilisation accrue du semelage.These
Dans le cas représenté, les bras 237 et pattes 238 de l'élément élastiquement déformable 230 se logent dans des évidements associés 244e, 244f du bloc support, ces évidements ayant des formes complémentaires et étant ménagés respectivement sur la face supérieure et les côtés de la partie avant 244 dudit bloc support 240.In the case shown, the
Les
Dans ces différents modes de réalisation qui ne font pas partie de la présente invention le semelage comporte toujours au moins deux éléments supports mais des moyens de rappel/stabilisation supplémentaires sont par ailleurs prévus.In these various embodiments that are not part of the present invention the sole assembly always comprises at least two support elements but additional return / stabilization means are also provided.
Dans le mode de réalisation de la
Comme dans le mode de réalisation de la
Afin de renforcer l'effet rappel élastique, la couche de contact 350 est également prévue de façon à relier les différents blocs supports 341, 342, 343, et comporte donc un voile de matière 355 reliant ces différents éléments au niveau de leur extrémité inférieure. La couche de contact 350 étant en un matériau très élastique tel que du caoutchouc ou toute matière élastomérisée, permet un effet de rappel du semelage à la position d'origine très intéressant.In order to reinforce the elastic return effect, the
Une telle construction permet un effet de stabilisation supplémentaire. En pratique ce voile de caoutchouc 355 permet d'éviter jusqu'à 5mm d'écartement résiduel des plots après retour à la position d'origine.Such a construction allows an additional stabilizing effect. In practice, this
En d'autres termes, on évite quasiment toute déformation résiduelle qui conduirait à l'écartement des plots. En pratique on évite une déformation résiduelle de 5 à 8 mm sur la largeur de la semelle.In other words, it avoids almost any residual deformation that would lead to the spacing of the pads. In practice, a residual deformation of 5 to 8 mm over the width of the sole is avoided.
Ce voile de caoutchouc 355 (ou autre matériau) peut être prévu seul i.e. indépendamment du voile 347.This rubber web 355 (or other material) can be provided alone ie independently of
La
Dans ce cas l'espace 460 entre deux éléments supports 441, 443, 442 (non représenté sur le dessin) est rempli par un matériau 461 tel que de l'EVA, du PU, du gel, destiné à éviter la présence d'un trou derrière le voile de matière 455. Cet espace 460 peut être comblé par des extensions localisées et de section plus faible du matériau des éléments supports 441, 442, 443 comme définies par exemple par les branches 355a, 355b, 355c de la
Dans le mode de réalisation de la
Cependant une cavité 548 est ménagée entre l'élément élastique déformable 530 et lesdits éléments supports 541, 543, 542, de façon à préserver l'indépendance desdits éléments supports et un voile de matière 547 dans le même matériau que les éléments supports 542, 543, 541 subsiste entre ceux-ci.However a
Dans le mode de réalisation de la
Les
Dans le cas de la
Dans le cas de la
La configuration des
Bien entendu dans les différents modes de réalisation, qui ne font pas partie de la présente invention le nombre de branches 355a, 355b, 355c ou 355d, 355e, peut être modifié et être par exemple de quatre ou plus, ou moins.Of course, in the various embodiments, which are not part of the present invention the number of
Bien entendu la présente invention n'est pas limitée aux modes de réalisation décrits ci-avant à titre d'exemples non limitatifs mais en englobe tous les modes de réalisation similaires ou équivalents.Of course, the present invention is not limited to the embodiments described above by way of non-limiting examples but encompasses all similar or equivalent embodiments.
Claims (15)
- Shoe comprising a stem positioned over an outer sole comprising an upper end and a lower end,
the outer sole (10, 110) comprising at the heel at least two support elements (41, 42, 43; 141, 142, 143; 241) made of cushioning material arranged respectively on the lateral and medial side of the sole, defining a support polygon having a length "I", each element (41, 42, 43; 141, 142, 143) extending in the vertical direction from essentially the upper end as far as essentially the lower end of the sole, the support elements (41, 42, 43; 141, 142, 143) being deformable essentially independently one from the other,
characterized in that the outer sole (10, 110) comprises an elastically deformable element (30, 130) comprising an upper part extending in the transverse direction of the sole and covering the upper end of each of the support elements (41, 42, 43; 141, 142, 143) and at least two tabs (34, 35, 36; 134, 135; 136) extending respectively laterally and medially and covering externally each of the support elements (41, 42, 43; 141, 142, 143) essentially over the entire height of the latter, in that, when a force "F" is applied to the sole in an essentially vertical direction the support elements will move apart from one another, stressing the elastically deformable element, and define a larger support polygon of width "L" which is greater than the width "I" of the preceding polygon, and in that, when the force "F" is removed, the elastically deformable element will exert a return force and tend to bring the support elements back into the initial position. - Shoe according to Claim 1, characterized in that the elastically deformable element (30, 130) is assembled securely with each of the support elements (41, 42, 43; 141, 142, 143).
- Shoe according to either one of Claims 1 and 2, characterized in that each tab (34, 35, 36; 134, 135; 136) of the elastically deformable element (30, 130, 230) is fixed at its lower end beneath the lower end of the associated support element.
- Shoe according to any one of Claims 1 to 3, characterized in that each support element (41, 42, 43; 141, 142, 143) is provided at its lower end with a contact layer.
- Shoe according to any one of Claims 1 to 4, characterized in that the sole comprises a medial side support element (41, 141) and two lateral side support elements (42, 43; 142, 143).
- Shoe according to Claim 5, characterized in that one of the lateral side support elements (42, 43; 142, 143) also extends over the rear of the heel.
- Shoe according to any one of Claims 1 to 6, characterized in that each support element (41, 42, 43; 141, 142, 143) is assembled on the elastically deformable element independently via its upper end.
- Shoe according to any one of Claims 1 to 6, characterized in that the support elements (41, 42, 43; 141, 142, 143) are assembled at their upper end to the elastically deformable element by means of a sheet of material (147).
- Shoe according to any one of Claims 1 to 8, characterized in that the hardness of the medial support element (41, 141) is greater than that of the lateral support elements (42, 43; 142, 143).
- Shoe according to Claim 9, characterized in that the elastically deformable element (30, 130) comprises, at its upper end, a part forming a trough arranged at the heel.
- Shoe according to Claim 10, characterized in that the part forming a trough extends as far as the arch of the shoe.
- Shoe according to any one of Claims 1 to 11, characterized in that the elastically deformable element (130) extends towards the front of the shoe via two horizontal arms which extend respectively laterally and medially.
- Shoe according to any one of Claims 1 to 12, characterized in that the sole comprises a layer of cushioning material (20, 120) arranged between the elastically deformable element and the stem.
- Shoe according to any one of Claims 1 to 13, characterized in that the support elements are made of cushioning foam material such as EVA, PU.
- Shoe according to any one of Claims 1 to 14, characterized in that the elastically deformable element is made of a material having a Young's modulus of at least 40 MPa.
Applications Claiming Priority (1)
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FR0603383A FR2899774B1 (en) | 2006-04-14 | 2006-04-14 | DAMPING SYSTEM FOR A SHOE |
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EP1844673A1 EP1844673A1 (en) | 2007-10-17 |
EP1844673B1 true EP1844673B1 (en) | 2015-10-07 |
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EP07006902.6A Not-in-force EP1844673B1 (en) | 2006-04-14 | 2007-04-03 | Shock-absorber system for a shoe |
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EP (1) | EP1844673B1 (en) |
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CN101053453B (en) | 2011-06-01 |
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CN101053453A (en) | 2007-10-17 |
RU2429770C2 (en) | 2011-09-27 |
EP1844673A1 (en) | 2007-10-17 |
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