EP4635355A1 - Reinforcing element for a sports shoe - Google Patents
Reinforcing element for a sports shoeInfo
- Publication number
- EP4635355A1 EP4635355A1 EP25168372.8A EP25168372A EP4635355A1 EP 4635355 A1 EP4635355 A1 EP 4635355A1 EP 25168372 A EP25168372 A EP 25168372A EP 4635355 A1 EP4635355 A1 EP 4635355A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcing element
- sole
- longitudinal branch
- intended
- foot
- 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.)
- Pending
Links
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
-
- 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
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/141—Soles; Sole-and-heel integral units characterised by the constructive form with a part of the sole being flexible, e.g. permitting articulation or torsion
-
- 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
- A43B5/00—Footwear for sporting purposes
- A43B5/06—Running shoes; Track shoes
-
- 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
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1415—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the location under the foot
-
- 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
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1455—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties
-
- 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
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1475—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form characterised by the type of support
Definitions
- the invention relates to a reinforcing element for a sole of a sports shoe.
- the invention also relates to a sports shoe, in particular a sports shoe suitable for running on uneven terrain, comprising such a reinforcing element.
- Trail running more commonly known as “trail” or “trail running,” is a sport that involves running or walking on a course in a natural environment. Participants are thus required to run or walk on uneven and/or slippery trails and/or uphill or downhill. Trails can be, for example, mountain paths, strewn with stones, roots, snow, or even sand. Trail running can even be practiced off-trail. Practicing this sport requires not only the endurance skills specific to running, but also great agility to efficiently cover these uneven terrains without injury.
- the aim of the invention is to provide a shoe for running on uneven terrain that is durable, effectively absorbs shocks, stable, lightweight and effectively transmits the impulses of its users.
- the invention relates to a sole for a sports shoe comprising a reinforcing element, the reinforcing element being intended to extend under the plantar fascia, the reinforcing element comprising a rear part, a front part, and a central hinge connecting the front part to the rear part, the front part being less rigid than the rear part, the rear part being intended to extend in front of a posterior support point of the foot, the front part comprising at least one longitudinal branch, the at least one longitudinal branch being intended to extend between an antero-internal support point and an antero-external support point of the foot.
- the at least one longitudinal branch may comprise a first longitudinal branch and a second longitudinal branch extending parallel to the first longitudinal branch.
- the first longitudinal branch may comprise a substantially constant width and thickness
- the second longitudinal branch may comprise a substantially constant width and thickness
- the first longitudinal branch may comprise a substantially straight inner lateral edge and a substantially straight outer lateral edge
- the second longitudinal branch may comprise a substantially straight inner lateral edge and a substantially straight outer lateral edge
- the rear portion of the reinforcing member may be intended to extend under a navicular bone, under a cuboid bone, under cuneiform bones, and under a rear portion of the five metatarsals of a foot, and the at least one longitudinal branch may be intended to extend under a front portion of the second metatarsal and/or under a front portion of the third metatarsal.
- the rear portion of the reinforcing member may include a set of closed-contour openings.
- the rear portion of the reinforcing element may comprise a set of stiffening ribs, the stiffening ribs extending projectingly, in particular downwardly, relative to a plane in which the rear portion extends.
- Said stiffening ribs may be arranged on the closed contour of said openings.
- the rear portion of the reinforcing member may include an upwardly extending inner lateral rim for extending along an inner lateral edge of the plantar fascia, and/or the rear portion of the reinforcing member may include an upwardly extending outer lateral rim for extending along an outer lateral edge of the plantar fascia.
- the rear portion of the reinforcing member may include a rear notch configured to move the rear fulcrum away from a rear edge of the reinforcing member. reinforcement of at least one centimeter.
- the central hinge may form a narrowest area of the reinforcing element along a transverse axis.
- the reinforcing element can be a monolithic element made of plastic and obtained by molding.
- the sole may include an upper portion having an upper surface for receiving a lower surface of a foot, the upper portion including an upper cushioning layer, the upper portion extending above the reinforcing member.
- the sole may include a lower portion having a lower surface for contacting the ground, the lower portion including a lower cushioning layer, the lower portion extending below the reinforcing element.
- the reinforcing element may comprise an exposed internal face on an internal side of the sole and/or an exposed external face on an external side of the sole.
- the invention also relates to a sports shoe, in particular a sports shoe suitable for running, preferably on uneven terrain, comprising a sole as defined above.
- the figures 1 And 2 illustrate, by means of exploded views, a sports shoe 1 suitable for running, particularly on uneven terrain, i.e. suitable for trail running.
- the sports shoe 1 mainly comprises a sole 2 and an upper 3.
- the sole 2 designates the part of the shoe 1 which extends between the lower surface of a foot and the ground on which the shoe rests.
- the upper 3 designates the part of the shoe 1 which extends around and above the foot.
- the upper 3 is shown schematically in the figures 1 And 2 .
- the upper 3 comprises in particular an upper opening for inserting the foot into the shoe 1, a tongue and tightening means, for example laces, for tightening the upper around the user's foot.
- the upper 3 may for example be made of fabric. It may comprise one or more pieces of fabric assembled together, and may optionally be provided with reinforcing elements.
- the upper 3 is fixed, for example sewn or glued, to the sole 2.
- the shoe 1 illustrated in the figures is a shoe for a right foot.
- the invention can of course be adapted for a left shoe and for any shoe size. It is assumed that the shoe rests on horizontal ground via its sole 2.
- the longitudinal axis X designates the horizontal axis oriented from the back to the front of the shoe, that is to say from the heel to the toes.
- the transverse axis Y designates the horizontal axis, perpendicular to the longitudinal axis X, oriented from left to right, left and right being defined according to the point of view of the user of the shoe 1 when looking in front of him.
- the vertical axis Z designates the axis perpendicular to the longitudinal axis X and to the transverse axis Y.
- the vertical axis Z is oriented from bottom to top.
- the terms “lower” and “upper” characterize an arrangement along the vertical axis Z.
- the terms “inner” and “outer” characterize an arrangement along the transverse axis Y: the inner side of the shoe designates the side of the shoe facing the user's second foot.
- the outer side of the shoe designates the side of the shoe opposite the inner side. In the case of a right shoe, the inner side therefore relates to the left side of the shoe and the outer side relates to the right side of the shoe.
- the sole 2 comprises, in a longitudinal and vertical plane, a lower surface of convex shape to promote good rolling of the foot when running.
- a rear part 4 and a front part 5 of the sole each comprise a lower surface in the shape of an arc of a circle, a center of the arc of a circle being positioned above the ground.
- the rear part 4 and the front part 5 are connected by an intermediate part 6 whose lower surface is substantially horizontal.
- the thickness of the sole 2 along the vertical axis Z may be roughly decreasing when traveling along the sole 2 from the back to the front.
- the sole 2 comprises a plurality of superimposed layers.
- the sole 2 comprises in particular an upper part 7 provided with an upper surface 8 in contact with the upper and/or directly with the surface lower part of a foot, a lower part 9 provided with a lower surface 10 in contact with the ground, and a reinforcing element 11 interposed between the upper part 7 and the lower part 9.
- the lower part 9 comprises a lower damping layer 12 and a wear layer 13 arranged under the lower damping layer 12.
- the wear layer 13 advantageously comprises a set of gripping studs 14 allowing the sole to adhere to uneven terrain such as rocks, sand or even snow.
- the wear layer 13 may for example be made of rubber, or even polyurethane (PU).
- the wear layer 13 also comprises a stone guard 15 arranged at its front end.
- the stone guard 15 is a substantially vertical part of the outsole, protecting the toes against frontal impacts.
- the upper portion 7 comprises an upper cushioning layer 16.
- the lower cushioning layer 12 and the upper cushioning layer 16 may be made of a cushioning synthetic polymer, such as a foam.
- the lower cushioning layer 12 and the upper cushioning layer 16 may be made of ethylene vinyl acetate (EVA) and/or polyurethane (PU).
- EVA ethylene vinyl acetate
- PU polyurethane
- the upper cushioning layer 16 may optionally also comprise a sockliner intended to come into direct contact with a foot (or indeed with a sock worn around a foot).
- the reinforcing element 11 is embedded in the sole 2, and is therefore mostly invisible from the outside of the shoe 1.
- the inner and outer lateral edges of the reinforcing element may nevertheless be visible respectively on the inner and outer sides of the sole.
- the reinforcing element may therefore comprise outer faces 81, 82 visible on the inner and outer sides of the sole 2.
- the outer face 82 is in particular clearly visible on the figure 3
- the reinforcing element 11 remains covered from above by the upper part 7.
- the reinforcing element does not come into direct contact with the user's foot, which makes it possible to maintain good comfort of the sports shoe.
- the reinforcing element 11 is covered from below by the lower part 9.
- the reinforcing element does not come into direct contact with the ground.
- the reinforcing element 11 could be completely embedded in the sole 2, without a visible face from the outside of the sole 2, or else include a visible face on only one of the two lateral sides of the sole.
- the reinforcing element 11 is illustrated in isolation in the figures 4 to 7 .
- the reinforcing element 11 is preferably made of a plastic material, possibly reinforced with fibers.
- the reinforcing element 11 may comprise polyamide (PA), acrylonitrile butadiene styrene (ABS), or any other plastic material with similar mechanical properties.
- the material may also be reinforced with different types of fillers such as glass or carbon fibers.
- the reinforcing element 11 may be a monolithic element, for example obtained by molding, in particular by injecting plastic into an injection mold.
- the reinforcing element 11 is a component of the sole that provides it with rigidity, stability and dynamism.
- the reinforcing element comprises a specific shape and dimensions that allow it to achieve these objectives without weighing down the sole 2, and without penalizing the sole's ability to absorb shocks, in particular vertical shocks that occur when the forefoot or the heel come into contact with the ground.
- the reinforcing element 11 comprises a rear part 21, a front part 22 and a central hinge 23 connecting the front part 22 to the rear part 21.
- the rear part 21 comprises a positioning, a shape and a rigidity adapted to obtain a particularly stable support on the ground.
- the front part 22 comprises a positioning, a shape and a rigidity giving to the sole has a certain elasticity, thus allowing a particularly effective transmission of the user's support.
- the rear portion 21 and the front portion 22 respectively comprise a length L1 and a length L2 along the longitudinal axis X.
- the total length L3 of the reinforcing element 11 along the longitudinal axis X is equal to the sum of the lengths L1 and L2.
- the length L2 is within the interval defined by 70% of the length L1 and 100% of the length L1.
- the total length L3 of the reinforcing element 11 may be between 50% and 80%, preferably between 60% and 70%, of the total length L4 of the sole 2 along the longitudinal axis X.
- the central hinge 23 can be positioned substantially in the center of the reinforcing element 11 or slightly towards the front of the reinforcing element along the longitudinal axis X.
- the central hinge 23 can be positioned at a distance d1 from the rear edge of the sole of between 50% and 70% of the total length L4 of the sole 2.
- the rear portion 21 comprises a width L5 along the transverse axis Y strictly greater than the width L6 of the front portion 22 along this same axis.
- the width L5 may be at least equal to 150% of the width L6, preferably at least equal to 200% of the width L6.
- the width L5 of the rear portion 21 may be substantially equal to the width L9 of the sole 2 along the transverse axis Y, the width L9 being considered at mid-length of the sole along the longitudinal axis X.
- the structure of a foot includes different bones including the calcaneus 31, the talus 32, the navicular bone 33, the cuboid bone 34, the cuneiform bones 35.1, 35.2, 35.3, five metatarsals 36.1, 36.2, 36.3, 36.4 and 36.5 and phalanges 37.
- the first metatarsal 36.1 is positioned on the side of the biggest toe and the fifth metatarsal 36.5 is positioned on the side of the smallest toe.
- the phalanges 37 are positioned in the extension of the metatarsals.
- the tibia 38 and the fibula 39 extend towards the high from the slope 32. When running, the phalanges articulate relative to the metatarsals.
- the foot naturally comprises three support points 41, 42, 43 on the ground thanks to which a person can remain stable when supporting himself on a single foot.
- a first support point 41, or posterior support 41 is positioned directly above a lower end of the calcaneus bone.
- the first support point 41 thus corresponds to the area of the heel which first comes into contact with the ground when walking or running.
- a second support point 42, or antero-internal support point 42 is positioned directly above a head of the first metatarsal 36.1, that is to say directly above a front protuberance of the first metatarsal 36.1.
- a third support point 43, or antero-external support point of the foot 43 is positioned directly above a head of the fifth metatarsal 36.5.
- the three support points 41, 42 and 43 are not aligned and are therefore positioned at the three vertices of a triangle.
- the foot also includes a plantar fascia 44, also known as the plantar fascia.
- the plantar fascia 44 is a thick band of connective tissue located on the underside of the foot. It extends from the calcaneus 31 to the heads of metatarsals 36.1, 36.2, 36.3, 36.4, and 36.5, forming the plantar arch or vault. It comprises a set of fibers running longitudinally, represented by dotted lines on the figure 9 .
- the plantar fascia 44 forms a relatively soft area under the foot, unlike the three support points 41, 42 and 43 which are firmer areas.
- the plantar fascia 44 plays a crucial role in maintaining the arch of the foot and in transmitting force during running.
- the reinforcing element 11 is intended to extend under the plantar fascia 44, and at a distance from the three support points 41, 42, 43.
- the reinforcing element 11 therefore does not extend under any of the three support points 41, 42 and 43.
- the three support points 41, 42 and 43 of the foot are thus released from the reinforcing element 11.
- the three support points 41, 42 and 43 are thus effectively cushioned by the cushioning layers 12 and 16 of the sole, without the reinforcing element 11 disturbing the cushioning effect of these layers.
- the soft tissues of the foot are effectively supported and protected by the reinforcing element 11.
- the rear portion 21 of the reinforcing element extends in particular in the intermediate portion 6 of the sole 2.
- the rear portion 21 extends in particular under the navicular bone 33, under the cuboid bone 34, under the cuneiform bones 35.1, 35.2, 35.3, and under a rear portion of the five metatarsals 36.1, 36.2, 36.3, 36.4 and 36.5.
- the rear portion 21 extends mainly in front of the calcaneus 31.
- the reinforcing element therefore does not extend under the calcaneus 31 or only under a front end of the calcaneus 31.
- the rearmost point or edge of the reinforcing element 11 is positioned in front of the first support point 41.
- the rearmost point or edge of the reinforcing element 11 is distant from the first support point 41 by at least approximately one centimeter, or even at least 15 millimeters, or even at least two centimeters.
- the front portion 22 of the reinforcing element extends longitudinally between the two support points 42 and 43.
- the front portion 22 extends mainly under a front portion of the second metatarsal 36.2 and/or under a front portion of the third metatarsal 36.3.
- the central hinge 23 of the reinforcing element makes it possible to decouple the front part 22 from the rear part 21.
- the central hinge 23 may in particular be formed by a narrower portion of the reinforcing element 11 along the transverse axis Y.
- the dimension of the reinforcing element 11 along the transverse axis Y is smaller at the central hinge 23 than at the areas of the reinforcing element 11 located at the front and rear of the central hinge.
- the central hinge 23 is positioned inside the triangle formed by the three support points 41, 42 and 43 of the foot.
- the front portion 22 of the reinforcing element is less rigid than the rear portion 21. Due to this difference in rigidity, the reinforcing element 11 flexes elastically exclusively or almost exclusively at its front portion 22 when the foot exerts a vertical bending force on the reinforcing element 11, during running. The rear portion 21 remains generally undeformed when such a bending force is exerted.
- the shape of the reinforcing element 11 when it is subjected to a bending force representative of the bending force exerted by the foot when running is represented by dotted lines T1 and T2. Thanks to the difference in rigidity between the rear part 21 and the front part 22, the rear part 21 remains undeformed, which provides stability to the sports shoe, while the front part provides elasticity and allows efficient propulsion of the user.
- the front part 22 comprises two longitudinal branches 24, 25 extending parallel to each other.
- the front part 22 thus comprises substantially the shape of a U or a tuning fork.
- the two longitudinal branches 24 and 25 meet at the hinge 23.
- a first longitudinal branch 24 extends under an internal half of the plantar fascia 44, and in particular under the second metatarsal 36.2.
- a second longitudinal branch 25 extends under an external half of the plantar fascia 44, and in particular under the third metatarsal 36.3.
- Each of the two longitudinal branches 24 and 25 can flex independently of the other branch. The use of at least two branches thus allows the sole to better conform to the shapes of uneven terrain.
- the presence of two branches improves the lateral stability and lateral dynamism of the shoe 1 during the support or impulse phases on the ground. If the foot rests on the ground more on its internal half, the first longitudinal branch 24 will tend to deform more than the second longitudinal branch 25. The first longitudinal branch 24 will provide dynamism to the support of the foot, while the second longitudinal branch 25 will provide stability. Conversely, if the foot rests on the ground more on its outer half, the second longitudinal branch 25 will tend to deform more than the first longitudinal branch 24. The second longitudinal branch 25 will provide dynamism to the support of the foot, while the first longitudinal branch 24 will provide stability. The use of at least two branches is therefore particularly useful for running on uneven terrain.
- the first longitudinal branch 24 comprises a substantially straight inner lateral edge 26 and a substantially straight outer lateral edge 27.
- the second longitudinal branch 25 comprises a substantially straight inner lateral edge 28 and a substantially straight outer lateral edge 29.
- the four edges 26, 27, 28, 29 are substantially parallel to the longitudinal axis X or possibly slightly inclined towards the inner edge of the foot to take into account the natural shape of the foot.
- the width L7, L8 of the two longitudinal branches 24 and 25 is therefore substantially constant along these longitudinal branches.
- Each longitudinal branch 24, 25 may comprise a free end.
- a terminal zone may be defined as a zone including the free end and whose length along the longitudinal axis is equal to 10% of the length of the branch considered.
- the width of each longitudinal branch 24, 25 at its terminal zone may be strictly decreasing.
- the width L7 is substantially equal to the width L8.
- the distance d2 separating the two longitudinal branches 24 and 25 is also substantially constant along these longitudinal branches.
- the thickness e1 of the two longitudinal branches 24 and 25 along the vertical axis Z may be uniform, i.e. constant along these longitudinal branches, for example of the order of one or two millimeters.
- the front part 22 could comprise a different number of longitudinal branches, for example a single longitudinal branch.
- the front part could comprise at least three longitudinal branches.
- the longitudinal branch(es) extend at a distance from the support points 41, 42 and 43.
- the rear portion 21 of the reinforcing element extends generally in a horizontal plane.
- the rear portion 21 may be flat or slightly curved upwards.
- the rear portion 21 comprises the shape of an openwork plate.
- the rear portion 21 thus comprises a set of openings 51, 52, 53, 54, 55, 56, 57 with a closed contour.
- opening with a closed contour is meant a hole passing through the rear portion 21, the contour of which forms a line closed on itself.
- the integration of contoured openings makes it possible to lighten the rear portion 21 without significantly penalizing its rigidity.
- the openings 51, 52, 53, 54, 55, 56, 57 may each comprise at least one dimension greater than or equal to 1 cm, or even greater than or equal to 2 cm.
- the openings 51, 52, 53, 54, 55, 56, 57 may comprise non-circular shapes, including polygonal shapes. Adjacent sides of each polygonal shape may be connected by rounded portions.
- the rear portion also comprises a set of substantially rectilinear arms 61, 62, 63, 64, delimiting the openings 51, 52, 53, 54, 55, 56, 57.
- the arms 61, 62, 63, 64 are connected to each other in a network pattern.
- a first arm 61 extends from the hinge 23 rearwardly and towards an inner side of the reinforcing element.
- An angle formed between the first arm 61 and the longitudinal axis X may be, for example, between 30° and 45° inclusive.
- a second arm 62 extends from the hinge 23 towards the rear end of the inner side of the reinforcing element.
- An angle formed between the second arm 62 and the longitudinal axis X may be, for example, between 10° and 30° inclusive.
- a third arm 63 extends from the hinge 23 toward the rear end of the outer side of the reinforcing element. An angle formed between the third arm 63 and the longitudinal axis X may be, for example, between 10° and 30° inclusive.
- a fourth arm 64 extends from the hinge 23 rearward and toward an outer side of the reinforcing element. An angle formed between the fourth arm 64 and the longitudinal axis X may be, for example, between 30° and 45° inclusive.
- the four arms 61, 62, 63, 64 thus form four spokes that extend from the hinge 23 rearward and in different directions.
- the latter also comprises a set of stiffening ribs 71, 72, 73.
- the stiffening ribs 71, 72, 73 extend projecting from a plane in which the rear portion extends.
- the stiffening ribs 71, 72, 73 extend downwards from the plane in which the rear portion 21 extends, for example by a few millimeters, for example between one and three millimeters.
- the rear portion 21 retains a generally flat upper surface and the formation of pressure points under the plantar fascia 44 is avoided.
- the stiffening ribs 71, 72, 73 are formed respectively on the contour of the openings 51, 54 and 55. Such positioning is particularly effective for stiffening the rear portion of the reinforcing element while limiting its volume and weight.
- the upper surface of the lower damping layer 12 comprises an imprint 74 matching the shape of the reinforcing element 11.
- the imprint 74 may in particular comprise recesses of a shape complementary to the stiffening ribs 71, 72, 73 and/or protrusions of a shape complementary to the openings 51, 52, 53, 54, 55, 56, 57.
- the lower surface of the upper damping layer 16 comprises an imprint 75 matching the shape of the reinforcing element 11.
- the imprint 75 may also comprise protrusions of a shape complementary to the openings 51, 52, 53, 54, 55, 56, 57.
- the integration of the reinforcing element 11 between the lower damping layer 12 and the upper damping layer 16 does not generate any tension in the material constituting these damping layers.
- the damping layers 12 and 16 thus retain all their damping power to absorb shocks linked to sports practice.
- the damping layers 12 and 16 can also be in direct contact with each other outside the reinforcing element 11, in particular under each of the three support points 41, 42 and 43. This prevents the formation of air pockets between the damping layers 12 and 16.
- the damping layers 12 and 16 provided with their imprints 74 and 75 can, for example, be obtained by molding.
- the two damping layers 12 and 16 can be glued against each other, thus trapping the reinforcing element between the two damping layers.
- the reinforcing element 11 could possibly be glued to the lower damping layer 12 and/or to the upper damping layer 16.
- the reinforcing element 11 could be integrated into a mold for manufacturing the lower damping layer 12 or the upper damping layer 16. The material forming the damping layer 12 or 16 would then be overmolded onto the reinforcing element 11.
- the rear portion 21 of the reinforcing element also comprises an internal lateral edge 65 and an external lateral edge 66.
- the internal lateral edge 65 and the external lateral edge 66 are positioned respectively along the internal side and along the external side of the sole.
- the internal lateral edge 65 and the external lateral edge 66 therefore extend respectively along an internal lateral edge and along an external lateral edge of the plantar fascia 44.
- the internal lateral edge 65 and the external lateral edge 66 frame the plantar fascia 44.
- the lateral edges 65 and 66 make it possible on the one hand to increase the rigidity of the reinforcing element 11, but also contribute to the support and overall stability of the foot.
- the side edges 65 and 66 therefore reduce the risk of twisting the ankle when running on uneven terrain.
- the internal lateral edge 65 comprises an internal face 81 visible from the outside of the sole.
- the external lateral edge 66 comprises an external face 82 visible from the outside of the sole. It is therefore understood that the rear portion 21 of the reinforcing element extends over the entire width of the sole 2.
- the inner side flange 65 and the outer side flange 66 both extend upwardly from the plane in which the rear portion 21 extends. These flanges may, for example, project upwardly by a few millimeters.
- the inner side flange 65 may connect a rear end of the first arm 61 to a rear end of the second arm 62. Secondary arms 67 may also connect the second arm 62 to the inner side flange 65.
- the outer side flange 66 may connect a rear end of the third arm 63 to a rear end of the fourth arm 64. Secondary arms 68 may also connect the third arm 63 to the outer side flange 66.
- the rear portion 21 of the reinforcing element also comprises a rear notch 58 configured to completely distance the reinforcing element from the rear support point 41 of the foot.
- the rear notch 58 makes it possible in particular to distance the rear support point 41 from the rear edge of the reinforcing element by at least one centimeter. This makes it possible to maintain a very effective cushioning effect of the cushioning layers 12 and 16.
- the rear notch 58 gives a rear edge of the rear portion 21 a concave shape.
- the rear notch 58 is an open-contour opening.
- the rear notch 58 may comprise an arcuate shape or a U-shape extending from a rear end of the inner lateral flange 65 to a rear end of the outer lateral flange 66.
- the center of said arcuate shape is positioned at the rear of the reinforcing element, substantially at the level of the rear support point 41.
- the rear ends of the inner lateral flange 65 and the outer lateral flange 66 respectively form the rearmost points 76 and 77 of the reinforcing element 11.
- the edge of the rear notch 58 may be formed by a rear portion of the second arm 62, a rear portion of the third arm 63, and a fifth arm 69 connecting the second arm 62 to the third arm 63.
- the distance L10 (identified on the figure 2 ) defined between the rear edge of the fifth arm 69 and the rear edge of the sole 2 along the longitudinal axis X may be at least equal to 20% of the total length L4 of the sole along this same axis, preferably at least 30%, or even at least 40% of the total length L4.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Physical Education & Sports Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Semelle (2) pour une chaussure de sport (1) comprenant un élément de renfort (11), l'élément de renfort étant destiné à s'étendre sous l'aponévrose plantaire (44), l'élément de renfort comprenant une partie arrière (21), une partie avant (22), et une charnière centrale (23) reliant la partie avant à la partie arrière, la partie avant étant moins rigide que la partie arrière, la partie arrière étant destinée à s'étendre à l'avant d'un point d'appui postérieur (41) du pied, la partie avant comprenant au moins une branche longitudinale (24, 25), l'au moins une branche longitudinale étant destinée à s'étendre entre un point d'appui antéro-interne (42) et un point d'appui antéro-externe (43) du pied.Sole (2) for a sports shoe (1) comprising a reinforcing element (11), the reinforcing element being intended to extend under the plantar fascia (44), the reinforcing element comprising a rear portion (21), a front portion (22), and a central hinge (23) connecting the front portion to the rear portion, the front portion being less rigid than the rear portion, the rear portion being intended to extend in front of a posterior support point (41) of the foot, the front portion comprising at least one longitudinal branch (24, 25), the at least one longitudinal branch being intended to extend between an antero-internal support point (42) and an antero-external support point (43) of the foot.
Description
L'invention concerne un élément de renfort pour une semelle d'une chaussure de sport. L'invention porte également sur une chaussure de sport, notamment une chaussure de sport adaptée pour la pratique de la course sur terrain accidenté, comprenant un tel élément de renfort.The invention relates to a reinforcing element for a sole of a sports shoe. The invention also relates to a sports shoe, in particular a sports shoe suitable for running on uneven terrain, comprising such a reinforcing element.
La course sur terrain accidenté, plus communément dénommée par les anglicismes « trail » ou « trail running », est un sport qui consiste à effectuer un parcours en milieu naturel, en courant ou en marchant. Les pratiquants sont ainsi amenés à courir ou à marcher sur des sentiers irréguliers et/ou glissants et/ou en montée ou en descente. Les sentiers peuvent être par exemple des chemins de montagne, parsemés de pierres, de racines, de neige ou encore de sable. La course sur terrain accidenté peut même être pratiquée en dehors des sentiers. La pratique de ce sport requiert non seulement des capacités d'endurance propres à la course à pied, mais également une grande agilité pour parcourir efficacement ces terrains accidentés sans se blesser.Trail running, more commonly known as "trail" or "trail running," is a sport that involves running or walking on a course in a natural environment. Participants are thus required to run or walk on uneven and/or slippery trails and/or uphill or downhill. Trails can be, for example, mountain paths, strewn with stones, roots, snow, or even sand. Trail running can even be practiced off-trail. Practicing this sport requires not only the endurance skills specific to running, but also great agility to efficiently cover these uneven terrains without injury.
La course sur terrain accidenté requiert ainsi l'utilisation de chaussures spécifiques qui permettent non seulement de courir mais qui possèdent également les propriétés suivantes :
- Ces chaussures doivent être particulièrement résistantes car elles sont régulièrement soumises à des chocs et/ou à des frottements.
- Ces chaussures doivent amortir les chocs, parfois très importants, surtout lors des descentes.
- Ces chaussures doivent être très stables pour limiter le risque de se tordre la cheville lors d'un appui sur un terrain déversant, une entorse de la cheville étant une blessure très fréquente lors de la pratique de la course sur terrain accidenté.
- Ces chaussures doivent aussi être très légères pour minimiser les efforts, notamment lors des montées.
- Enfin, ces chaussures doivent transmettre efficacement les impulsions pour permettre une course rapide lorsque le terrain le permet.
- These shoes must be particularly resistant because they are regularly subjected to shocks and/or friction.
- These shoes must absorb shocks, sometimes very significant, especially during descents.
- These shoes must be very stable to limit the risk of twisting the ankle when running on sloping terrain, as a sprained ankle is a very common injury when running on uneven terrain.
- These shoes must also be very light to minimize effort, especially when climbing.
- Finally, these shoes must transmit impulses efficiently to allow fast running when the terrain allows it.
Les chaussures pour la pratique de la course sur terrain accidenté connues dans l'état de la technique ne satisfont pas toutes ces propriétés. Ainsi des améliorations des chaussures de sport existantes sont souhaitables.The state-of-the-art shoes for running on rough terrain do not meet all of these properties. Therefore, improvements to existing sports shoes are desirable.
Le but de l'invention est de fournir une chaussure pour la pratique de la course sur terrain accidenté à la fois résistante, amortissant efficacement les chocs, stable, légère et transmettant efficacement les impulsions de leurs utilisateurs.The aim of the invention is to provide a shoe for running on uneven terrain that is durable, effectively absorbs shocks, stable, lightweight and effectively transmits the impulses of its users.
L'invention se rapporte à une semelle pour une chaussure de sport comprenant un élément de renfort, l'élément de renfort étant destiné à s'étendre sous l'aponévrose plantaire, l'élément de renfort comprenant une partie arrière, une partie avant, et une charnière centrale reliant la partie avant à la partie arrière, la partie avant étant moins rigide que la partie arrière, la partie arrière étant destinée à s'étendre à l'avant d'un point d'appui postérieur du pied, la partie avant comprenant au moins une branche longitudinale, l'au moins une branche longitudinale étant destinée à s'étendre entre un point d'appui antéro-interne et un point d'appui antéro-externe du pied.The invention relates to a sole for a sports shoe comprising a reinforcing element, the reinforcing element being intended to extend under the plantar fascia, the reinforcing element comprising a rear part, a front part, and a central hinge connecting the front part to the rear part, the front part being less rigid than the rear part, the rear part being intended to extend in front of a posterior support point of the foot, the front part comprising at least one longitudinal branch, the at least one longitudinal branch being intended to extend between an antero-internal support point and an antero-external support point of the foot.
L'au moins une branche longitudinale peut comprendre une première branche longitudinale et une deuxième branche longitudinale s'étendant parallèlement à la première branche longitudinale.The at least one longitudinal branch may comprise a first longitudinal branch and a second longitudinal branch extending parallel to the first longitudinal branch.
La première branche longitudinale peut comprendre une largeur et une épaisseur sensiblement constante, et/ou la deuxième branche longitudinale peut comprendre une largeur et une épaisseur sensiblement constante.The first longitudinal branch may comprise a substantially constant width and thickness, and/or the second longitudinal branch may comprise a substantially constant width and thickness.
La première branche longitudinale peut comprendre un bord latéral interne sensiblement rectiligne et un bord latéral externe sensiblement rectiligne, et/ou la deuxième branche longitudinale peut comprendre un bord latéral interne sensiblement rectiligne et un bord latéral externe sensiblement rectiligne.The first longitudinal branch may comprise a substantially straight inner lateral edge and a substantially straight outer lateral edge, and/or the second longitudinal branch may comprise a substantially straight inner lateral edge and a substantially straight outer lateral edge.
La partie arrière de l'élément de renfort peut être destinée à s'étendre sous un os naviculaire, sous un os cuboïde, sous des os cunéiformes, et sous une partie arrière des cinq métatarsiens d'un pied, et l'au moins une branche longitudinale peut être destinée à s'étendre sous une partie avant du deuxième métatarsien et/ou sous une partie avant du troisième métatarsien.The rear portion of the reinforcing member may be intended to extend under a navicular bone, under a cuboid bone, under cuneiform bones, and under a rear portion of the five metatarsals of a foot, and the at least one longitudinal branch may be intended to extend under a front portion of the second metatarsal and/or under a front portion of the third metatarsal.
La partie arrière de l'élément de renfort peut comprendre un ensemble d'ouvertures à contour fermé.The rear portion of the reinforcing member may include a set of closed-contour openings.
La partie arrière de l'élément de renfort peut comprendre un ensemble de nervures de rigidification, les nervures de rigidification s'étendant en saillie, notamment vers le bas, par rapport à un plan dans lequel la partie arrière s'étend.The rear portion of the reinforcing element may comprise a set of stiffening ribs, the stiffening ribs extending projectingly, in particular downwardly, relative to a plane in which the rear portion extends.
Lesdites nervures de rigidification peuvent être agencées sur le contour fermé desdites ouvertures.Said stiffening ribs may be arranged on the closed contour of said openings.
La partie arrière de l'élément de renfort peut comprendre un rebord latéral interne s'étendant vers le haut et destiné à s'étendre le long d'un bord latéral interne de l'aponévrose plantaire, et/ou la partie arrière de l'élément de renfort peut comprendre un rebord latéral externe s'étendant vers le haut et destiné à s'étendre le long d'un bord latéral externe de l'aponévrose plantaire.The rear portion of the reinforcing member may include an upwardly extending inner lateral rim for extending along an inner lateral edge of the plantar fascia, and/or the rear portion of the reinforcing member may include an upwardly extending outer lateral rim for extending along an outer lateral edge of the plantar fascia.
La partie arrière de l'élément de renfort peut comprendre une échancrure arrière configurée pour éloigner le point d'appui postérieur d'un bord arrière de l'élément de renfort d'au moins un centimètre.The rear portion of the reinforcing member may include a rear notch configured to move the rear fulcrum away from a rear edge of the reinforcing member. reinforcement of at least one centimeter.
La charnière centrale peut former une zone la plus étroite de l'élément de renfort suivant un axe transversal.The central hinge may form a narrowest area of the reinforcing element along a transverse axis.
L'élément de renfort peut être un élément monolithique constitué de plastique et obtenu par moulage.The reinforcing element can be a monolithic element made of plastic and obtained by molding.
La semelle peut comprendre une partie supérieure pourvue d'une surface supérieure destinée à recevoir une surface inférieure d'un pied, la partie supérieure comprenant une couche amortissante supérieure, la partie supérieure s'étendant au-dessus de l'élément de renfort.The sole may include an upper portion having an upper surface for receiving a lower surface of a foot, the upper portion including an upper cushioning layer, the upper portion extending above the reinforcing member.
La semelle peut comprendre une partie inférieure pourvue d'une surface inférieure destinée à entrer en contact avec le sol, la partie inférieure comprenant une couche amortissante inférieure, la partie inférieure s'étendant en-dessous de l'élément de renfort.The sole may include a lower portion having a lower surface for contacting the ground, the lower portion including a lower cushioning layer, the lower portion extending below the reinforcing element.
L'élément de renfort peut comprendre une face interne apparente sur un côté interne de la semelle et/ou une face externe apparente sur un côté externe de la semelle.The reinforcing element may comprise an exposed internal face on an internal side of the sole and/or an exposed external face on an external side of the sole.
L'invention se rapporte également à une chaussure de sport, notamment une chaussure de sport adaptée pour la pratique de la course-à-pied, de préférence sur terrain accidenté, comprenant une semelle telle que définie précédemment.The invention also relates to a sports shoe, in particular a sports shoe suitable for running, preferably on uneven terrain, comprising a sole as defined above.
Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode de réalisation particulier fait à titre non-limitatif en relation avec les figures jointes parmi lesquelles :
- La
figure 1 est une vue en perspective de dessus et en éclaté d'une chaussure de sport selon un mode de réalisation de l'invention. - La
figure 2 est une vue en perspective de dessous et en éclaté de la chaussure de sport de lafigure 1 . - La
figure 3 est une vue de profil d'une semelle de la chaussure de sport. - La
figure 4 est une vue de dessus d'un élément de renfort de la semelle de lafigure 3 . - La
figure 5 est une vue de profil de l'élément de renfort. - La
figure 6 est une vue en perspective de dessous de l'élément de renfort. - La
figure 7 est une vue en perspective de dessus de l'élément de renfort. - La
figure 8 est une vue schématique de profil de l'anatomie d'un pied d'un utilisateur de la chaussure de sport. - La
figure 9 est une vue schématique de dessus de l'anatomie du pied de l'utilisateur de la chaussure de sport. - La
figure 10 est la vue schématique de dessus de l'anatomie du pied de lafigure 9 sur laquelle on a superposé une vue de dessus de la semelle de lafigure 3 .
- There
figure 1 is a top and exploded perspective view of a sports shoe according to one embodiment of the invention. - There
figure 2 is a perspective view from below and exploded of the sports shoe of thefigure 1 . - There
figure 3 is a side view of a sole of the sports shoe. - There
figure 4 is a top view of a reinforcing element of the sole of thefigure 3 . - There
Figure 5 is a profile view of the reinforcement element. - There
figure 6 is a perspective view from below of the reinforcing element. - There
figure 7 is a top perspective view of the reinforcing element. - There
figure 8 is a schematic side view of the anatomy of a foot of a sports shoe user. - There
figure 9 is a schematic top view of the anatomy of the foot of the sports shoe user. - There
figure 10 is the schematic top view of the anatomy of the foot of thefigure 9 on which a top view of the sole of thefigure 3 .
Les
La chaussure 1 illustrée sur les figures est une chaussure pour pied droit. L'invention peut bien sûr être déclinée pour une chaussure gauche et pour toute pointure de chaussure. On suppose que la chaussure repose sur un sol horizontal par l'intermédiaire de sa semelle 2. L'axe longitudinal X désigne l'axe horizontal orienté de l'arrière vers l'avant de la chaussure, c'est-à-dire du talon vers les orteils. L'axe transversal Y désigne l'axe horizontal, perpendiculaire à l'axe longitudinal X, orienté de la gauche vers la droite, la gauche et la droite étant définies selon le point de vue de l'utilisateur de la chaussure 1 lorsqu'il regarde devant lui. L'axe vertical Z désigne l'axe perpendiculaire à l'axe longitudinal X et à l'axe transversal Y. L'axe vertical Z est orienté de bas en haut. Dans la suite de la description, les termes « inférieur » et « supérieur » caractérisent un agencement selon l'axe vertical Z. Les termes « interne » et « externe » caractérisent un agencement selon l'axe transversal Y : le coté interne de la chaussure désigne le côté de la chaussure tourné vers le deuxième pied de l'utilisateur. Le côté externe de la chaussure désigne le côté de la chaussure opposé au côté interne. S'agissant d'une chaussure droite, le côté interne se rapporte donc au côté gauche de la chaussure et le côté externe se rapporte au côté droit de la chaussure.The shoe 1 illustrated in the figures is a shoe for a right foot. The invention can of course be adapted for a left shoe and for any shoe size. It is assumed that the shoe rests on horizontal ground via its sole 2. The longitudinal axis X designates the horizontal axis oriented from the back to the front of the shoe, that is to say from the heel to the toes. The transverse axis Y designates the horizontal axis, perpendicular to the longitudinal axis X, oriented from left to right, left and right being defined according to the point of view of the user of the shoe 1 when looking in front of him. The vertical axis Z designates the axis perpendicular to the longitudinal axis X and to the transverse axis Y. The vertical axis Z is oriented from bottom to top. In the remainder of the description, the terms "lower" and "upper" characterize an arrangement along the vertical axis Z. The terms "inner" and "outer" characterize an arrangement along the transverse axis Y: the inner side of the shoe designates the side of the shoe facing the user's second foot. The outer side of the shoe designates the side of the shoe opposite the inner side. In the case of a right shoe, the inner side therefore relates to the left side of the shoe and the outer side relates to the right side of the shoe.
Comme cela est visible sur la
En référence aux
La couche d'usure 13 comprend avantageusement un ensemble de crampons 14 adhérents permettant à la semelle d'adhérer à des terrains accidentés tels que des rochers, du sable ou encore de la neige. La couche d'usure 13 peut être par exemple en caoutchouc, ou encore en polyuréthane (PU). La couche d'usure 13 comprend aussi un pare-pierre 15 agencé à son extrémité avant. Le pare-pierre 15 est une partie de la semelle d'usure sensiblement verticale, protégeant les orteils contre les chocs frontaux.The wear layer 13 advantageously comprises a set of gripping studs 14 allowing the sole to adhere to uneven terrain such as rocks, sand or even snow. The wear layer 13 may for example be made of rubber, or even polyurethane (PU). The wear layer 13 also comprises a stone guard 15 arranged at its front end. The stone guard 15 is a substantially vertical part of the outsole, protecting the toes against frontal impacts.
La partie supérieure 7 comprend une couche amortissante supérieure 16. La couche amortissante inférieure 12 et la couche amortissante supérieure 16 peuvent être constituées d'un polymère synthétique amortissant, tel qu'une mousse. Par exemple, la couche amortissante inférieure 12 et la couche amortissante supérieure 16 peuvent être en éthylène-acétate de vinyle (EVA) et/ou en polyuréthane (PU). La couche amortissante supérieure 16 peut éventuellement aussi comprendre une semelle de propreté destinée à entrer en contact direct avec un pied (ou bien sûr avec une chaussette enfilée autour d'un pied).The upper portion 7 comprises an upper cushioning layer 16. The lower cushioning layer 12 and the upper cushioning layer 16 may be made of a cushioning synthetic polymer, such as a foam. For example, the lower cushioning layer 12 and the upper cushioning layer 16 may be made of ethylene vinyl acetate (EVA) and/or polyurethane (PU). The upper cushioning layer 16 may optionally also comprise a sockliner intended to come into direct contact with a foot (or indeed with a sock worn around a foot).
L'élément de renfort 11 est noyé dans la semelle 2, et est donc majoritairement invisible depuis l'extérieur de la chaussure 1. Les bords latéraux interne et externe de l'élément de renfort peuvent néanmoins être apparents respectivement sur les côtés interne et externe de la semelle. L'élément de renfort peut donc comprendre des faces externes 81, 82 apparentes sur des côtés interne et externe de la semelle 2. La face externe 82 est notamment bien visible sur la
L'élément de renfort 11 est illustré isolément sur les
L'élément de renfort 11 est un composant de la semelle qui lui confère de la rigidité, de la stabilité et du dynamisme. L'élément de renfort comprend une forme et des dimensions spécifiques qui lui permettent d'atteindre ces objectifs sans alourdir la semelle 2, et sans pénaliser la capacité de la semelle à amortir les chocs, notamment les chocs verticaux qui apparaissent lorsque l'avant du pied ou le talon entrent en contact avec le sol.The reinforcing element 11 is a component of the sole that provides it with rigidity, stability and dynamism. The reinforcing element comprises a specific shape and dimensions that allow it to achieve these objectives without weighing down the sole 2, and without penalizing the sole's ability to absorb shocks, in particular vertical shocks that occur when the forefoot or the heel come into contact with the ground.
En relation avec les
La partie arrière 21 et la partie avant 22 comprennent respectivement une longueur L1 et une longueur L2 selon l'axe longitudinal X. La longueur totale L3 de l'élément de renfort 11 selon l'axe longitudinal X est égale à la somme des longueurs L1 et L2. De préférence, la longueur L2 est comprise dans l'intervalle défini par 70% de la longueur L1 et 100% de la longueur L1. La longueur totale L3 de l'élément de renfort 11 peut être comprise entre 50% et 80%, de préférence entre 60% et 70%, de la longueur totale L4 de la semelle 2 selon l'axe longitudinal X.The rear portion 21 and the front portion 22 respectively comprise a length L1 and a length L2 along the longitudinal axis X. The total length L3 of the reinforcing element 11 along the longitudinal axis X is equal to the sum of the lengths L1 and L2. Preferably, the length L2 is within the interval defined by 70% of the length L1 and 100% of the length L1. The total length L3 of the reinforcing element 11 may be between 50% and 80%, preferably between 60% and 70%, of the total length L4 of the sole 2 along the longitudinal axis X.
La charnière centrale 23 peut être positionnée sensiblement au centre de l'élément de renfort 11 ou légèrement vers l'avant de l'élément de renfort selon l'axe longitudinal X. La charnière centrale 23 peut être positionnée à une distance d1 du bord arrière de la semelle comprise entre 50% et 70% de la longueur totale L4 de la semelle 2.The central hinge 23 can be positioned substantially in the center of the reinforcing element 11 or slightly towards the front of the reinforcing element along the longitudinal axis X. The central hinge 23 can be positioned at a distance d1 from the rear edge of the sole of between 50% and 70% of the total length L4 of the sole 2.
La partie arrière 21 comprend une largeur L5 selon l'axe transversal Y strictement supérieure à la largeur L6 de la partie avant 22 selon ce même axe. En particulier la largeur L5 peut être au moins égale à 150% de la largeur L6, de préférence au moins égale à 200% de la largeur L6. La largeur L5 de la partie arrière 21 peut être sensiblement égale à la largeur L9 de la semelle 2 selon l'axe transversal Y, la largeur L9 étant considérée à mi longueur de la semelle selon l'axe longitudinal X.The rear portion 21 comprises a width L5 along the transverse axis Y strictly greater than the width L6 of the front portion 22 along this same axis. In particular, the width L5 may be at least equal to 150% of the width L6, preferably at least equal to 200% of the width L6. The width L5 of the rear portion 21 may be substantially equal to the width L9 of the sole 2 along the transverse axis Y, the width L9 being considered at mid-length of the sole along the longitudinal axis X.
Pour bien comprendre le fonctionnement de l'élément de renfort 11, on rappelle aussi certaines caractéristiques de l'anatomie du pied en relation avec les
Le pied comprend naturellement trois points d'appui 41, 42, 43 sur le sol grâce auxquels une personne peut demeurer stable lorsqu'elle est en appui sur un seul pied. Un premier point d'appui 41, ou appui postérieur 41, est positionné à l'aplomb d'une extrémité inférieure de l'os calcanéum. Le premier point d'appui 41 correspond ainsi à la zone du talon qui entre en premier en contact avec le sol lors de la pratique de la marche ou de la course à pied. Un deuxième point d'appui 42, ou point d'appui antéro-interne 42, est positionné à l'aplomb d'une tête du premier métatarsien 36.1, c'est-à-dire à l'aplomb d'une protubérance avant du premier métatarsien 36.1. Un troisième point d'appui 43, ou point d'appui antéro-externe du pied 43, est positionné à l'aplomb d'une tête du cinquième métatarsien 36.5. Les trois points d'appui 41, 42 et 43 ne sont pas alignés et sont donc positionnés aux trois sommets d'un triangle.The foot naturally comprises three support points 41, 42, 43 on the ground thanks to which a person can remain stable when supporting himself on a single foot. A first support point 41, or posterior support 41, is positioned directly above a lower end of the calcaneus bone. The first support point 41 thus corresponds to the area of the heel which first comes into contact with the ground when walking or running. A second support point 42, or antero-internal support point 42, is positioned directly above a head of the first metatarsal 36.1, that is to say directly above a front protuberance of the first metatarsal 36.1. A third support point 43, or antero-external support point of the foot 43, is positioned directly above a head of the fifth metatarsal 36.5. The three support points 41, 42 and 43 are not aligned and are therefore positioned at the three vertices of a triangle.
Le pied comprend également une aponévrose plantaire 44, également connue sous le nom de fascia plantaire. L'aponévrose plantaire 44 est une épaisse bande de tissu conjonctif située sous le pied. Elle s'étend du calcanéum 31 jusqu'aux têtes des métatarsiens 36.1, 36.2, 36.3, 36.4 et 36.5, formant ainsi l'arche plantaire ou voute plantaire. Elle comprend un ensemble de fibres s'étendant longitudinalement, représentées par des traits en pointillés sur la
Sur la
La partie arrière 21 de l'élément de renfort s'étend notamment dans la partie intermédiaire 6 de la semelle 2. La partie arrière 21 s'étend notamment sous l'os naviculaire 33, sous l'os cuboïde 34, sous les os cunéiformes 35.1, 35.2, 35.3, et sous une partie arrière des cinq métatarsiens 36.1, 36.2, 36.3, 36.4 et 36.5. La partie arrière 21 s'étend principalement à l'avant du calcanéum 31. L'élément de renfort ne s'étend donc pas sous le calcanéum 31 ou alors seulement sous une extrémité avant du calcanéum 31. En particulier, le point ou le bord le plus à l'arrière de l'élément de renfort 11 est positionné à l'avant du premier point d'appui 41. Avantageusement, le point ou le bord le plus à l'arrière de l'élément de renfort 11 est éloigné du premier point d'appui 41 d'au moins environ un centimètre, voire au moins 15 millimètres, voire même au moins deux centimètres.The rear portion 21 of the reinforcing element extends in particular in the intermediate portion 6 of the sole 2. The rear portion 21 extends in particular under the navicular bone 33, under the cuboid bone 34, under the cuneiform bones 35.1, 35.2, 35.3, and under a rear portion of the five metatarsals 36.1, 36.2, 36.3, 36.4 and 36.5. The rear portion 21 extends mainly in front of the calcaneus 31. The reinforcing element therefore does not extend under the calcaneus 31 or only under a front end of the calcaneus 31. In particular, the rearmost point or edge of the reinforcing element 11 is positioned in front of the first support point 41. Advantageously, the rearmost point or edge of the reinforcing element 11 is distant from the first support point 41 by at least approximately one centimeter, or even at least 15 millimeters, or even at least two centimeters.
La partie avant 22 de l'élément de renfort s'étend longitudinalement entre les deux points d'appui 42 et 43. En particulier, la partie avant 22 s'étend principalement sous une partie avant du deuxième métatarsien 36.2 et/ou sous une partie avant du troisième métatarsien 36.3.The front portion 22 of the reinforcing element extends longitudinally between the two support points 42 and 43. In particular, the front portion 22 extends mainly under a front portion of the second metatarsal 36.2 and/or under a front portion of the third metatarsal 36.3.
La charnière centrale 23 de l'élément de renfort permet de découpler la partie avant 22 de la partie arrière 21. La charnière centrale 23 peut notamment être formée par une portion plus étroite de l'élément de renfort 11 suivant l'axe transversal Y. Autrement dit, la dimension de l'élément de renfort 11 suivant l'axe transversal Y est plus faible au niveau de la charnière centrale 23 qu'au niveau de zones de l'élément de renfort 11 situées à l'avant et à l'arrière de la charnière centrale. Comme cela est visible sur la
La partie avant 22 de l'élément de renfort est moins rigide que la partie arrière 21. En raison de cette différence de rigidité, l'élément de renfort 11 fléchit élastiquement exclusivement ou presque exclusivement au niveau de sa partie avant 22 lorsque le pied exerce un effort de flexion vertical sur l'élément de renfort 11, lors de la pratique de la course à pied. La partie arrière 21 demeure globalement indéformée lorsqu'on exerce un tel effort de flexion. Sur la
Comme cela est bien visible sur la
Selon une variante de réalisation, la partie avant 22 pourrait comprendre un nombre différent de branches longitudinales, par exemple une seule branche longitudinale. A l'inverse, la partie avant pourrait comprendre au moins trois branches longitudinales. Dans tous les cas, la ou les branches longitudinales s'étendent à distance des points d'appui 41, 42 et 43.According to an alternative embodiment, the front part 22 could comprise a different number of longitudinal branches, for example a single longitudinal branch. Conversely, the front part could comprise at least three longitudinal branches. In all cases, the longitudinal branch(es) extend at a distance from the support points 41, 42 and 43.
La partie arrière 21 de l'élément de renfort s'étend globalement dans un plan horizontal. La partie arrière 21 peut être plane ou légèrement bombée vers le haut. La partie arrière 21 comprend la forme d'une plaque ajourée. La partie arrière 21 comprend ainsi un ensemble d'ouvertures 51, 52, 53, 54, 55, 56, 57 à contour fermé. Par « ouverture à contour fermé » on comprend un trou traversant la partie arrière 21, dont le contour forme une ligne refermée sur elle-même. L'intégration d'ouvertures à contour permet d'alléger la partie arrière 21 sans pénaliser significativement sa rigidité. Les ouvertures 51, 52, 53, 54, 55, 56, 57 peuvent comprendre chacune au moins une dimension supérieure ou égale à 1cm, voire supérieure ou égale à 2cm. Les ouvertures 51, 52, 53, 54, 55, 56, 57 peuvent comprendre des formes non circulaires, notamment des formes polygonales. Les côtés adjacents de chaque forme polygonale peuvent être reliés par des portions arrondies.The rear portion 21 of the reinforcing element extends generally in a horizontal plane. The rear portion 21 may be flat or slightly curved upwards. The rear portion 21 comprises the shape of an openwork plate. The rear portion 21 thus comprises a set of openings 51, 52, 53, 54, 55, 56, 57 with a closed contour. By "opening with a closed contour" is meant a hole passing through the rear portion 21, the contour of which forms a line closed on itself. The integration of contoured openings makes it possible to lighten the rear portion 21 without significantly penalizing its rigidity. The openings 51, 52, 53, 54, 55, 56, 57 may each comprise at least one dimension greater than or equal to 1 cm, or even greater than or equal to 2 cm. The openings 51, 52, 53, 54, 55, 56, 57 may comprise non-circular shapes, including polygonal shapes. Adjacent sides of each polygonal shape may be connected by rounded portions.
La partie arrière comprend aussi un ensemble de bras 61, 62, 63, 64, sensiblement rectilignes, délimitant les ouvertures 51, 52, 53, 54, 55, 56, 57. Les bras 61, 62, 63, 64 sont reliés les uns aux autres selon un motif en réseau. Un premier bras 61 s'étend depuis la charnière 23 vers l'arrière et vers un côté interne de l'élément de renfort. Un angle formé entre le premier bras 61 et l'axe longitudinal X peut être, par exemple, compris entre 30° et 45° inclus. Un deuxième bras 62 s'étend depuis la charnière 23 vers l'extrémité arrière du côté interne de l'élément de renfort. Un angle formé entre le deuxième bras 62 et l'axe longitudinal X peut être, par exemple, compris entre 10° et 30° inclus. Un troisième bras 63 s'étend depuis la charnière 23 vers l'extrémité arrière du côté externe de l'élément de renfort. Un angle formé entre le troisième bras 63 et l'axe longitudinal X peut être, par exemple, compris entre 10° et 30° inclus. Un quatrième bras 64 s'étend depuis la charnière 23 vers l'arrière et vers un côté externe de l'élément de renfort. Un angle formé entre le quatrième bras 64 et l'axe longitudinal X peut être, par exemple, compris entre 30° et 45° inclus. Les quatre bras 61, 62, 63, 64 forment ainsi quatre rayons qui s'étendent depuis la charnière 23 vers l'arrière et dans des directions différentes.The rear portion also comprises a set of substantially rectilinear arms 61, 62, 63, 64, delimiting the openings 51, 52, 53, 54, 55, 56, 57. The arms 61, 62, 63, 64 are connected to each other in a network pattern. A first arm 61 extends from the hinge 23 rearwardly and towards an inner side of the reinforcing element. An angle formed between the first arm 61 and the longitudinal axis X may be, for example, between 30° and 45° inclusive. A second arm 62 extends from the hinge 23 towards the rear end of the inner side of the reinforcing element. An angle formed between the second arm 62 and the longitudinal axis X may be, for example, between 10° and 30° inclusive. A third arm 63 extends from the hinge 23 toward the rear end of the outer side of the reinforcing element. An angle formed between the third arm 63 and the longitudinal axis X may be, for example, between 10° and 30° inclusive. A fourth arm 64 extends from the hinge 23 rearward and toward an outer side of the reinforcing element. An angle formed between the fourth arm 64 and the longitudinal axis X may be, for example, between 30° and 45° inclusive. The four arms 61, 62, 63, 64 thus form four spokes that extend from the hinge 23 rearward and in different directions.
Pour rigidifier la partie arrière 21, celle-ci comprend aussi un ensemble de nervures de rigidification 71, 72, 73. Les nervures de rigidification 71, 72, 73 s'étendent en saillie, par rapport à un plan dans lequel la partie arrière s'étend. Avantageusement, les nervures de rigidification 71, 72, 73 s'étendent vers le bas depuis le plan dans lequel la partie arrière 21 s'étend, par exemple de l'ordre de quelques millimètres, par exemple entre un et trois millimètres. Ainsi, la partie arrière 21 conserve une surface supérieure globalement plate et on évite de former des points de pression sous l'aponévrose plantaire 44. En particulier, les nervures de rigidification 71, 72, 73 sont formées respectivement sur le contour des ouvertures 51, 54 et 55. Un tel positionnement est particulièrement efficace pour rigidifier la partie arrière de l'élément de renfort tout en limitant son volume et son poids.To stiffen the rear portion 21, the latter also comprises a set of stiffening ribs 71, 72, 73. The stiffening ribs 71, 72, 73 extend projecting from a plane in which the rear portion extends. Advantageously, the stiffening ribs 71, 72, 73 extend downwards from the plane in which the rear portion 21 extends, for example by a few millimeters, for example between one and three millimeters. Thus, the rear portion 21 retains a generally flat upper surface and the formation of pressure points under the plantar fascia 44 is avoided. In particular, the stiffening ribs 71, 72, 73 are formed respectively on the contour of the openings 51, 54 and 55. Such positioning is particularly effective for stiffening the rear portion of the reinforcing element while limiting its volume and weight.
Comme cela est visible sur la
Les couches amortissantes 12 et 16 pourvues de leurs empreintes 74 et 75 peuvent, par exemple, être obtenues par moulage. Les deux couches amortissantes 12 et 16 peuvent être collées l'une contre l'autre, emprisonnant ainsi l'élément de renfort entre les deux couches amortissantes. En complément, l'élément de renfort 11 pourrait éventuellement être collé à la couche amortissante inférieure 12 et/ou à la couche amortissante supérieure 16. Selon une autre technique de fabrication, l'élément de renfort 11 pourrait être intégré à un moule de fabrication de la couche amortissante inférieure 12 ou de la couche amortissante supérieure 16. Le matériau formant la couche amortissante 12 ou 16 serait alors surmoulé sur l'élément de renfort 11.The damping layers 12 and 16 provided with their imprints 74 and 75 can, for example, be obtained by molding. The two damping layers 12 and 16 can be glued against each other, thus trapping the reinforcing element between the two damping layers. In addition, the reinforcing element 11 could possibly be glued to the lower damping layer 12 and/or to the upper damping layer 16. According to another manufacturing technique, the reinforcing element 11 could be integrated into a mold for manufacturing the lower damping layer 12 or the upper damping layer 16. The material forming the damping layer 12 or 16 would then be overmolded onto the reinforcing element 11.
La partie arrière 21 de l'élément de renfort comprend également un rebord latéral interne 65 et un rebord latéral externe 66. Le rebord latéral interne 65 et le rebord latéral externe 66 sont positionnés respectivement le long du côté interne et le long du côté externe de la semelle. Le rebord latéral interne 65 et le rebord latéral externe 66 s'étendent donc respectivement le long d'un bord latéral interne et le long d'un bord latéral externe de l'aponévrose plantaire 44. Autrement dit, le rebord latéral interne 65 et le rebord latéral externe 66 encadrent l'aponévrose plantaire 44. Les rebords latéraux 65 et 66 permettent d'une part d'augmenter la rigidité de l'élément de renfort 11, mais participent aussi au maintien et à la stabilité globale du pied. Les rebords latéraux 65 et 66 réduisent donc le risque de se tordre la cheville lors de la pratique de la course à pied sur terrain accidenté.The rear portion 21 of the reinforcing element also comprises an internal lateral edge 65 and an external lateral edge 66. The internal lateral edge 65 and the external lateral edge 66 are positioned respectively along the internal side and along the external side of the sole. The internal lateral edge 65 and the external lateral edge 66 therefore extend respectively along an internal lateral edge and along an external lateral edge of the plantar fascia 44. In other words, the internal lateral edge 65 and the external lateral edge 66 frame the plantar fascia 44. The lateral edges 65 and 66 make it possible on the one hand to increase the rigidity of the reinforcing element 11, but also contribute to the support and overall stability of the foot. The side edges 65 and 66 therefore reduce the risk of twisting the ankle when running on uneven terrain.
Comme évoqué précédemment, le rebord latéral interne 65 comprend une face interne 81 visible depuis l'extérieur de la semelle. De même, le rebord latéral externe 66 comprend une face externe 82 visible depuis l'extérieur de la semelle. On comprend donc que la partie arrière 21 de l'élément de renfort s'étend sur toute la largeur de la semelle 2.As mentioned previously, the internal lateral edge 65 comprises an internal face 81 visible from the outside of the sole. Similarly, the external lateral edge 66 comprises an external face 82 visible from the outside of the sole. It is therefore understood that the rear portion 21 of the reinforcing element extends over the entire width of the sole 2.
Le rebord latéral interne 65 et le rebord latéral externe 66 s'étendent tous les deux vers le haut depuis le plan dans lequel la partie arrière 21 s'étend. Ces rebords peuvent être, par exemple, en saillie vers le haut de quelques millimètres.The inner side flange 65 and the outer side flange 66 both extend upwardly from the plane in which the rear portion 21 extends. These flanges may, for example, project upwardly by a few millimeters.
Le rebord latéral interne 65 peut relier une extrémité arrière du premier bras 61 à une extrémité arrière du deuxième bras 62. Des bras secondaires 67 peuvent aussi relier le deuxième bras 62 au rebord latéral interne 65. Le rebord latéral externe 66 peut relier une extrémité arrière du troisième bras 63 à une extrémité arrière du quatrième bras 64. Des bras secondaires 68 peuvent aussi relier le troisième bras 63 au rebord latéral externe 66.The inner side flange 65 may connect a rear end of the first arm 61 to a rear end of the second arm 62. Secondary arms 67 may also connect the second arm 62 to the inner side flange 65. The outer side flange 66 may connect a rear end of the third arm 63 to a rear end of the fourth arm 64. Secondary arms 68 may also connect the third arm 63 to the outer side flange 66.
La partie arrière 21 de l'élément de renfort comprend aussi une échancrure arrière 58 configurée pour éloigner complètement l'élément de renfort du point d'appui postérieur 41 du pied. L'échancrure arrière 58 permet notamment d'éloigner le point d'appui postérieur 41 du bord arrière de l'élément de renfort d'au moins un centimètre. Ceci permet de conserver un effet amortissant très performant des couches amortissantes 12 et 16. L'échancrure arrière 58 confère à un bord arrière de la partie arrière 21 une forme concave.The rear portion 21 of the reinforcing element also comprises a rear notch 58 configured to completely distance the reinforcing element from the rear support point 41 of the foot. The rear notch 58 makes it possible in particular to distance the rear support point 41 from the rear edge of the reinforcing element by at least one centimeter. This makes it possible to maintain a very effective cushioning effect of the cushioning layers 12 and 16. The rear notch 58 gives a rear edge of the rear portion 21 a concave shape.
L'échancrure arrière 58 est une ouverture à contour ouvert. L'échancrure arrière 58 peut comprendre une forme en arc de cercle ou une forme de U s'étendant depuis une extrémité arrière du rebord latéral interne 65 jusqu'à une extrémité arrière du rebord latéral externe 66. Le centre dudit arc de cercle est positionné à l'arrière de l'élément de renfort, sensiblement au niveau du point d'appui postérieur 41. Les extrémités arrière du rebord latéral interne 65 et du rebord latéral externe 66 forment respectivement les points 76 et 77 les plus à l'arrière de l'élément de renfort 11. Le bord de l'échancrure arrière 58 peut être formé par une portion arrière du deuxième bras 62, une portion arrière du troisième bras 63, et un cinquième bras 69 reliant le deuxième bras 62 au troisième bras 63. La distance L10 (identifiée sur la
Finalement, grâce à l'invention on dispose d'une chaussure adaptée pour la pratique de la course sur terrain accidenté qui amortit efficacement les chocs, notamment sous les trois points d'appui naturels du pied, et qui est particulièrement stable, ce qui limite les risques que son utilisateur se torde la cheville.Finally, thanks to the invention, we have a shoe suitable for running on uneven terrain which effectively absorbs shocks, particularly under the three natural support points of the foot, and which is particularly stable, which limits the risk of the user twisting their ankle.
Claims (15)
et/ou en ce qu'elle comprend une partie inférieure (9) pourvue d'une surface inférieure (10) destinée à entrer en contact avec le sol, la partie inférieure comprenant une couche amortissante inférieure (12), la partie inférieure (9) s'étendant en-dessous de l'élément de renfort (11).Sole (2) according to one of the preceding claims, characterized in that it comprises an upper part (7) provided with an upper surface (8) intended to receive a lower surface of a foot, the upper part comprising an upper shock-absorbing layer (16), the upper part (7) extending above the reinforcing element (11),
and/or in that it comprises a lower part (9) provided with a lower surface (10) intended to come into contact with the ground, the lower part comprising a lower damping layer (12), the lower part (9) extending below the reinforcing element (11).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2403600A FR3160858A1 (en) | 2024-04-08 | 2024-04-08 | Reinforcement element for sports shoes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4635355A1 true EP4635355A1 (en) | 2025-10-22 |
Family
ID=92627512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25168372.8A Pending EP4635355A1 (en) | 2024-04-08 | 2025-04-03 | Reinforcing element for a sports shoe |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250311808A1 (en) |
| EP (1) | EP4635355A1 (en) |
| CN (1) | CN120770606A (en) |
| FR (1) | FR3160858A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4120136C2 (en) * | 1991-06-19 | 1995-03-16 | Uhl Sportartikel Karl | Shoe sole, in particular sports shoe sole |
| US7062865B1 (en) * | 2001-12-28 | 2006-06-20 | Nordt Iii William E | Orthotic |
| US7263788B2 (en) * | 2002-03-06 | 2007-09-04 | Nike, Inc. | Sole-mounted footwear stability system |
| US20150327624A1 (en) * | 2014-05-13 | 2015-11-19 | Ariat International, Inc. | Energy return, cushioning, and arch support plates, and footwear and footwear soles including the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3140521B1 (en) * | 2022-10-07 | 2024-08-30 | Salomon Sas | Shoe sole |
-
2024
- 2024-04-08 FR FR2403600A patent/FR3160858A1/en active Pending
-
2025
- 2025-04-03 US US19/169,726 patent/US20250311808A1/en active Pending
- 2025-04-03 EP EP25168372.8A patent/EP4635355A1/en active Pending
- 2025-04-08 CN CN202510430926.2A patent/CN120770606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4120136C2 (en) * | 1991-06-19 | 1995-03-16 | Uhl Sportartikel Karl | Shoe sole, in particular sports shoe sole |
| US7062865B1 (en) * | 2001-12-28 | 2006-06-20 | Nordt Iii William E | Orthotic |
| US7263788B2 (en) * | 2002-03-06 | 2007-09-04 | Nike, Inc. | Sole-mounted footwear stability system |
| US20150327624A1 (en) * | 2014-05-13 | 2015-11-19 | Ariat International, Inc. | Energy return, cushioning, and arch support plates, and footwear and footwear soles including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250311808A1 (en) | 2025-10-09 |
| FR3160858A1 (en) | 2025-10-10 |
| CN120770606A (en) | 2025-10-14 |
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