Sole element for customizable forefoot stiffness

Abstract

The present invention relates to a sole element (100) adapted to be arranged in a shoe, preferably a sports shoe. The sole element (100) is a strobel board (120) and / or an insole. The sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), wherein the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot. The sole element (100) is adapted to be arranged in the shoe when wearing the shoe.

Description

Field of the invention

[0001] The present invention relates to sole elements adapted to be arranged in a shoe, preferably a sports shoe. The sole element is a strobel board and / or an insole. The sole element comprises means for stiffening at least a portion of the sole element, wherein the at least a portion of the sole element is located in a region adapted to receive a forefoot. The sole element is adapted to be arranged in the shoe when wearing the shoe.Technical background

[0002] Aiming to maximize the performance of an athlete is at the very heart of the development and evolution of sporting goods. This especially applies to sport shoes, e.g., running shoes, where the performance of the athlete crucially depends on the performance of the shoe. Therefore, a lot of effort has been made to optimize the performance of sport shoes, particularly running shoes.

[0003] An important benchmark for the assessment of the performance of a shoe is the energy return and / or the propulsion of the shoe. For example, the energy return and / or the propulsion of the shoe can be steered by a stiffness of the shoe. In particular, a higher energy return and / or a higher propulsion can be achieved by increasing the stiffness of the shoe.

[0004] Typically, a shoe is manufactured with a predefined stiffness, which cannot be adapted after completion of the manufacturing process, thereby rendering the stiffness, the energy return and / or the propulsion a permanent property of the shoe. However, different athletes prefer different stiffness of the shoe, and the performance of an athlete can be significantly diminished when the stiffness of the shoe does not match the particular preferences of the athlete.

[0005] DE 100 00 207 A1 relates to a footbed having an elastically deformable stiffening insert for correcting the foot when the tread of a shoe equipped with this footbed contacts the ground, characterized in that the stiffening insert is designed for elastically deforming the footbed into a correction position when the tread of the shoe is partially in contact with the ground.

[0006] DE 10 2010 028 889 A1 is directed to a shoe insole, characterized in that the shoe insole has a stiffening area which comprises at least one area of the shoe insole which, when the foot is in contact with the insole, extends substantially diagonally from the talus and navicular bone to the metatarsal head IV and / or V, wherein the stiffening area is arched against the sole of the foot in the area of the talus and navicular bone when the foot is in contact with the insole and the shoe insole has a raised area, wherein, when the foot is in contact with the insole, at least the area from the metatarsal head III to the metatarsal head V is raised relative to the bearing surface of the metatarsophalangeal joint of the big toe.

[0007] EP 4 066 671 A1 describes a sole for a shoe, comprising a sole body and elongated structures arranged on or in the sole body at least in a forefoot area for the transverse stiffening of the sole, wherein the elongated structures are arranged with their longitudinal axes transverse to the longitudinal direction of the sole.

[0008] Therefore, there is a need for new technologies for changing and improving the performance of shoes, particularly sports shoes, addressing at least some of the above-described disadvantages of the prior art and further improving other aspects.Summary of the invention

[0009] A first aspect of the present invention relates to a sole element adapted to be arranged in a shoe, preferably a sports shoe. The sole element is a strobel board and / or an insole and the sole element comprises means for stiffening at least a portion of the sole element. Specifically, the at least a portion of the sole element is located at least in a region adapted to receive a forefoot. In addition, the sole element is adapted to be arranged in the shoe when wearing the shoe.

[0010] For example, the strobel board and / or the insole may be adapted to be arranged in the shoe. Being adapted to be arranged in the shoe may comprise that the sole element is fixedly attached to the shoe. For example, the sole element may be arranged in the shoe such as to be an integral part of the shoe. Specifically, the sole element may be permanently attached to at least a part of the shoe, e.g., an upper of the shoe and / or a midsole of the shoe. In particular, the strobel board may be arranged in the shoe such as to be an integral part of the shoe. In addition, or alternatively, being adapted to be arranged in the shoe may comprise that the sole element is configured such that the shole element can be received by the shoe. For example, a size and / or a geometry and / or a thickness of the sole element may be such that the shoe can receive the sole element. Specifically, the insole may be adapted such that the insole can be received by the shoe, e.g., by placing the insole inside the shoe.

[0011] The sole element comprises means for stiffening at least a portion of the sole element. The means for stiffening may comprise at least one means for stiffening the at least a portion of the sole element. The means for stiffening may be adapted such that the at least portion of the sole element that is stiffen by the means for stiffening is located in a region adapted to receive a forefoot. The region adapted to receive the forefoot may comprise a region that receives at least a portion of the forefoot when the sole element is arranged in the shoe. For example, the forefoot region may comprise a region associated with a toe and / or phalanges of the foot.

[0012] Being adapted to be arranged in the shoe when wearing the shoe may comprise that the sole element is arranged in the shoe when an athlete is wearing the shoe for performing (athletic) activities. In other words, the sole element may be adapted to be arranged in the shoe at least during a (typical) use of the shoe, e.g., performing (athletic) activities such as walking and / or running.

[0013] Stiffening at least a portion of the sole element located in a region adapted to receive a forefoot allows for an adaption of the forefoot stiffness of the sole element. Adapting the forefoot stiffness of the sole element enables a localized and specific adaption of the responsiveness and / or an energy return of a shoe comprising the sole element. Thereby, the forefoot stiffness and / or the responsiveness of the shoe can be adapted to the athletes needs and thus optimizes the performance of the athlete and enhances the wearing comfort of the shoe.

[0014] Generally, the means for stiffening at least a portion of the sole element may be adapted to stiffen at least a portion of the shoe adapted to receive a forefoot. In addition, or alternatively, the means for stiffening at least a portion of the sole element may be adapted to stiffen at least a portion of the shoe adapted to receive a midfoot. Specifically, the means for stiffening may be arranged such as to extend from a portion of the shoe adapted to receive a forefoot towards the portion of the shoe adapted to receive a midfoot.

[0015] In some embodiments, to stiffen at least a portion of the shoe adapted to receive a forefoot and / or a midfoot may comprise to increase the propulsion associated with the shoe. In addition, or alternatively, to stiffen at least a portion of the shoe adapted to receive a forefoot and / or midfoot may comprise to reduce a stud pressure associated with the shoe.

[0016] For example, the means for stiffening may be arranged such that, when the sole element is arranged in the shoe, the means for stiffening also stiffen(s) a portion of the shoe adapted to receive a portion of the forefoot. In other words, the means for stiffening may stiffen the portion of the sole element and the portion of the shoe. For example, the stiffening of the portion of the shoe may be based on the stiffening of the portion of the sole element. In particular, the stiffening of the portion of the sole element by the means for stiffening may induce, when the sole element is arranged in the shoe, a stiffening of the portion of the shoe. The at least a portion of the shoe stiffened by the means for stiffening may essentially correspond to the at least a portion of the sole element stiffened by the means for stiffening. Alternatively, the at least a portion of the shoe stiffened by the means for stiffening may be a sub-portion of the at least a portion of the sole element stiffened by the means for stiffening. Alternatively, the at least a portion of the shoe stiffened by the means for stiffening may be a super-portion of the at least a portion of the sole element stiffened by the means for stiffening.

[0017] The means for stiffening may stiffen the at least a portion of the sole element and / or the shoe such as to increase the propulsion associated with the shoe. For example, the propulsion associated with the shoe may comprise an energy return associated with the shoe. Specifically, by stiffening the at least a portion of shoe adapted to receive a forefoot, the energy return of the shoe can be increased. Particularly, an energy return of the shoe associated with the forefoot region can be increased. Increasing the energy return associated with the forefoot region of the shoe minimized the energy loss of the shoe and thereby optimizes the performance of an athlete wearing the shoe. For example, an enhanced energy return of the portion of the shoe adapted to receive the forefoot may be particularly advantageous for athletes performing forefoot running.

[0018] In addition, or alternatively, the means for stiffening may stiffen the at least a portion of the sole element and / or the shoe such as to reduce the stud pressure associated with the shoe. Reducing the stud pressure associated with the shoe may comprise reducing a pressure and / or force that a stud may exert on the sole element and / or the shoe based on a weight of the athlete wearing the shoe. Specifically, the stiffening of the at least a portion of the sole element and / or the shoe may allow for distributing the force which the stud exerts on the shoe and / or sole element and / or foot over a larger region and thereby minimizing the pressure (force per area). Thus, stiffening the at least a portion of the sole element and / or shoe enhances the wearing comfort of the shoe comprising the sole element and thereby contribute to an optimized performance of the athlete. In particular, the reduced stud pressure and the increased propulsion and / or energy return generate a synergistic effect of enabling the athlete wearing the shoe to achieve optimum performance.

[0019] In general, the sole element may be arranged in the shoe such that at least a portion of the sole element is exchangeable. In particular, the at least a portion of the sole element which is exchangeable may comprise the means for stiffening.

[0020] Arranging the sole element in the shoe such that at least a portion of the sole element is exchangeable may comprise that the at least portion of the sole element can be exchanged without substantially affecting other components of the sole element and / or the shoe. For example, the at least a portion of the sole element may be not permanently fixed to other components of the shoe and / or midsole, e.g., not fixed to other components via gluing and / or stitching. In addition, or alternatively, arranging the sole element in the shoe such that at least a portion of the sole element is exchangeable may comprise that the at least portion of the sole element can be exchanged based on the athlete's needs. Generally, the at least a portion of the sole element which is exchangeable may be located in a region adapted to receive a forefoot. In some embodiments, the at least a portion of the sole element that is exchangeable may comprise essentially the sole element, e.g., the sole element itself may be exchangeable. For example, when the sole element comprises the insole, the sole element may be exchangeable.

[0021] By arranging the sole element such that at least a portion of the sole element is exchangeable, preferably a portion the means for stiffening, the stiffness of the sole element and / or the shoe may be steered based on the athlete's needs. In particular, the at least a portion of the means for stiffening which is / are exchangeable may be exchanged and / or replaced by a different at least a portion of the means for stiffening. In other words, a first portion of the means for stiffening may be exchanged and / or replaced by a second portion of the means for stiffening.

[0022] Specifically, the first portion of the means for stiffening and the second portion of the means for stiffening may comprise different stiffening properties, e.g., the first portion may comprise first stiffening properties and the second portion may comprise second stiffening properties. In particular, the first stiffening properties of the first portion may be such as to induce a first stiffness of the sole element and / or the shoe. In addition, or alternatively, the second stiffening properties of the second portion may be such as to induce a second stiffness of the sole element and / or the shoe. For example, the second stiffening properties of the second element may be such that at least a portion of the sole element and / or shoe comprising the second element is stiffer than at least a portion of the sole element and / or shoe comprising the first portion.

[0023] Specifically, the at least a portion of the sole element which is exchangeable may be adapted to be exchanged and / or removed through an opening of the shoe. For example, the at least a portion of the sole element which is exchangeable may be adapted to be exchanged and / or removed through an ankle opening of the shoe.

[0024] Exchanging and / or removing the at least a portion of the sole element through an opening of the shoe allows for an easy and fast exchange of the at least a portion of the sole element. Specifically, exchanging and / or removing the at least a portion of the sole element through an ankle opening of the shoe allows for exchanging and / or removing the at least a portion of the sole element through a natural, e.g., an opening that a shoe necessarily has, opening of the shoe. In other words, when the at least a portion of the sole element is exchanged and / or removed through the ankle opening of the shoe, no further and / or additional openings must be introduced into the shoe, e.g., further and / or additional openings in a midsole of the shoe. Thereby, the manufacturing process of the shoe may be simplified and accelerated. In addition, the stability of the shoe may be increased as no further openings, i.e., areas without a material, must be introduced.

[0025] Generally, the means for stiffening may comprise a pocket adapted to receive a stiffening element. In particular, the pocket may be adapted to receive the stiffening element through an opening.

[0026] The pocket may be located in a region adapted to receive a forefoot. The pocket may comprise a size and / or a geometry such that the pocket can receive the stiffening element. In general, a pocket may comprise and / or define a cavity. For example, the pocket may comprise a size and / or a geometry such that a size and / or geometry of the cavity essentially corresponds to a size and / or a geometry of the stiffening element. The pocket may comprise an opening, e.g., an access to the cavity, through which the stiffening element can be received. Specifically, the pocket may be adapted such that the opening points towards the opening of the shoe, when the sole element is arranged in the shoe. In particular, the pocket may be adapted such that the opening of the pocket points towards the ankle opening of the shoe.

[0027] In addition, the opening of pocket may be such that the stiffening element can be removed from the pocket. In other words, the pocket may be adapted such that the stiffening element can be exchanged. For example, the pocket may receive a first stiffening element comprising first stiffening properties. Afterwards, the first stiffening element may be removed through the opening of the pocket and a second stiffening element comprising second stiffening properties may be received.

[0028] Means for stiffening comprising a pocket adapted to receive a stiffening element enable an efficient and simple exchange and / or replacement of the stiffening element. An efficient and simple exchange and / or replacement of the stiffening element contributes to an optimized adjustment of the propulsion and / or energy return and / or stud pressure of the shoe.

[0029] Specifically, the pocket may be comprised within the strobel board. In addition, or alternatively, the pocket may be at least partially attached to the strobel board. In particular, the pocket may be at least partially attached to the strobel board via stitching. In addition, or alternatively, the pocket may be at least partially attached to the strobel board via knitting.

[0030] For example, the pocket may be an integral part of the strobel board, e.g., the strobel and the pocket may be one piece. For example, a fist portion of the pocket may extend from the strobel board, and a second portion of the pocket may be comprised within the strobel board. Specifically, at least a portion of an inner side of the cavity of the pocket may be formed by the strobel board.

[0031] A pocket which is comprised within the strobel board allows for the use of a one-piece strobel board. A one-piece strobel board enhances the stability of the pocket and contributes to the longevity of the strobel board. In addition, a pocket comprised within the strobel board allows for attaching the pocket to the strobel board without creating seams, thereby contributing to an optimized wearing comfort of the shoe.

[0032] In addition, or alternatively, at least a portion of the pocket may be attached to the strobel board. For example, the pocket may be attached such to the strobel board that a portion of the pocket is formed by the strobel board. In addition, or alternatively, a separate pocket may be attached to the strobel board. In other words, a prefabricated pocket forming a cavity by itself, may be attached to the strobel board.

[0033] Specifically, the pocket may be attached to the strobel board via stitching. For example, the pocket may be attached to the strobel board via stitching an outer region and / or a boundary region of the pocket to the strobel. In addition, or alternatively, the pocket may be attached to the strobel board via knitting. For example, the pocket may be attached to the strobel board via knitting an outer region and / or a boundary region of the pocket to the strobel.

[0034] Attaching the pocket to the strobel board via stitching and / or knitting allows for a simplified creation of the pocket at the strobel board. In addition, attaching the pocket to the strobel board via stitching and / or knitting enhances the quality of the attachment, e.g., an attachment which is particularly resistant against external forces, thereby contributing to the longevity of the strobel board.

[0035] In some embodiments, the pocket may be arranged on a side of the strobel board adapted to face an inside of the shoe.

[0036] For example, the pocket may be at least partially attached to a side of the strobel board adapted to face an inside of the shoe. In addition, or alternatively, the pocket may be comprised within the strobel board such that at least a portion of the pocket extends from a side of the strobel board adapted to face an inside of the shoe. For example, the pocket may be arranged on a side of the strobel board such that the opening of the pocket is arranged on a side of the strobel board adapted to face the inside of the shoe.

[0037] Facing an inside of the shoe may comprise that at least a portion of the side of the strobel board is covered by components of the shoe. For example, the at least a portion of the side of the strobel board may be covered by an insole. In other words, the side of the strobel board adapted to face an inside of the shoe may be not directly (optically) accessible, e.g., visible through the ankle opening of the shoe, but may be covered by an insole of the shoe.

[0038] Arranging the pocket on a side of the strobel board adapted to face an inside of the shoe enables the arrangement of the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe. Arranging the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe facilitates the exchange of the stiffening element. In particular, arranging the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe ensures that the pocket, e.g., the opening of the pocket, is (directly) accessible through the opening, e.g., the ankle opening, of the shoe. Thereby, a first stiffening element received in the pocket may be removed from the pocket through opening of the pocket and through the ankle opening of the shoe and a second stiffening element may be inserted into the pocket through the ankle opening and the opening of the pocket. Thus, arranging the pocket on a side of the strobel board adapted to face an inside of the shoe optimizes the exchangeability of the portion of the means for stiffening, e.g., the stiffening element.

[0039] In general, the pocket may comprise means for fixing the stiffening element. For example, the means for fixing may comprise a hook-and-loop fastener.

[0040] For example, the means for fixing the stiffening element may comprise means for maintaining the stiffening element within the pocket. Specifically, the means for fixing the stiffening element may comprise means for at least partially closing the opening of the pocket. Generally, the means for fixing may be adapted such that the stiffening element can be unfastened. In other words, the means for fixing the stiffening element may comprise means for reversibly fixing the stiffening element. For example, the means for fixing the stiffening element may comprise a hook-and-loop fastener. In addition, or alternatively, the means for fixing the stiffening element may comprise at least one button, preferably a push button. At least a portion of the means for fixing the stiffening element may be arranged on a side of the strobel board adapted to face an inside of the shoe.

[0041] A pocket comprising means for fixing the stiffening element, e.g., a hook-and-loop fastener for closing at least a portion of the opening of the pocket, allows for fixing and maintaining the stiffening element in an intended and / or preconfigured position. In particular, the means for fixing the stiffening element allows for maintaining the stiffening element within the pocket and thereby ensures that the stiffening element remains within a region of the strobel board adapted to receive a forefoot. Thus, when wearing the shoe, the stiffening element remains within the pocket, stiffens a region of the strobel board and / or shoe adapted to receive a forefoot and thereby maximizes the energy return of the shoe, minimizes the stud pressure associated with the shoe and optimizes the performance of an athlete wearing the shoe.

[0042] Generally, the means for stiffening may comprise a stiffening plate.

[0043] A stiffening plate may comprise that an extension of the stiffening plate in a first direction is substantially smaller than an extension in a second direction. For example, a thickness associated with the stiffening plate may be substantially smaller than a planar extension of the stiffening plate. Specifically, the stiffening plate may comprise a contiguous and / or connected plate. The stiffening plate may comprise at least one recess. In addition, or alternatively, the stiffening plate may comprise at least one aperture.

[0044] Generally, the stiffening plate may be adapted to be received in the pocket of the strobel board. For example, a size and / or shape of the stiffening plate may be configured such as to enable the stiffening plate to be received by the pocket.

[0045] Means for stiffening comprising a stiffening plate enable the stiffening of the strobel board and / or the shoe by an element with a small thickness, thereby minimizing variations of the form of the strobel board when the stiffening plate is placed inside the pocket. In particular, using a stiffening plate minimizes the formation of bulges within the strobel board and / or deformations of the strobel board, when the stiffening plate is placed in the pocket. The minimization the formation of bulges within the strobel board and / or deformations of the strobel board contributes to an optimization of the wearing comfort of the shoe.

[0046] In some embodiments, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board. Specifically, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board by gluing. In addition, or alternatively, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board by stitching.

[0047] For example, the stiffening element may be attached to the strobel board at a boundary and / or outer region of the stiffening element. In particular, at least a portion of the boundary and / or outer region of the stiffening element may be sewn and / or stitched to the strobel board. Specifically, the stiffening element may be adapted such that at least a portion of the boundary and / or outer region of the stiffening element follows a portion of the boundary and / or outer region of the strobel board. In other words, a portion of the boundary and / or outer region of the stiffening element may be sewn and / or stitched to a portion of the boundary and / or outer region of the strobel board. In addition, or alternatively, at least a portion of the stiffening element may be attached to the strobel board by gluing. For example, gluing a portion of the stiffening element to the strobel board may comprise that at least a centre portion and / or mid-portion of the stiffening element is glued to the strobel board. In some embodiments, the stiffening element may be glued to the strobel board essentially across the complete surface of the stiffening element facing the strobel board.

[0048] Attaching the stiffening element at least partially to the strobel board by gluing and / or stitching facilitates the attachment of the stiffening element while at the same time guaranteeing a stable attachment, e.g., an attachment resistant against external forces.

[0049] Generally, the stiffening element and / or the stiffening plate may comprise at least one aperture. For example, the stiffening element and / or the stiffening plate may comprise at least 2, preferably at least 3, most preferably at least 4 apertures. Specifically, the at least one aperture may comprise an elliptical geometry. For example, a major-semi axis of the elliptical geometry may be essentially parallel to a direction of elongation of the strobel board and / or shoe. In general, the stiffening element and / or the stiffening plate may comprise a rib-like structure. For example, the at least one aperture of the stiffening element and / or the stiffening plate may be separated by at least one rib. For example, the stiffening element and / or the stiffening plate may comprise at least one, preferably at least two, most preferably at least three ribs. In addition, or alternatively, the stiffening element and / or the stiffening plate may comprise a lattice and / or cell structure.

[0050] A stiffening element and / or stiffening plate with at least one aperture, preferably arranged in a rib- and / or lattice- and / or cell-like structure allows for a sufficient stiffening of the strobel board and the shoe comprising the strobel board while at the same time minimizing the weight of the stiffening element and / or stiffening plate.

[0051] In addition, or alternatively, the stiffening element and / or the stiffening plate may comprise at least one finger. For example, the stiffening element and / or the stiffening plate may be adapted such that the at least one finger extends to medial forefoot portion of the strobel board. In particular, the at least one finger of the stiffening element and / or the stiffening plate may extend such to the medial forefoot portion of the strobel board that the at least one finger is located in a region of the strobel board associated with a hallux of a foot. In addition, or alternatively, the stiffening element and / or the stiffening plate may be adapted such that the at least one finger extends to a lateral and / or central midfoot portion of the strobel board. Generally, the length of the at least one finger may be at least 0.5 cm, preferably at least 1 cm, more preferably at least 1.5 cm, even more preferably at least 2 cm, most preferably at least 2.5 cm.

[0052] In general, at least a portion of the means for stiffening may be injected into the strobel board.

[0053] For example, injecting at least a portion of the means for stiffening into the strobel board may comprise injecting at least a portion of the means for stiffening into a premanufactured strobel board. For example, the at least a portion of the means for stiffening may be injected such into the strobel board as to form an insole board. Specifically, injecting the at least a portion of the means for stiffening into the strobel board may comprise arranging a textile, e.g., the strobel, in a mould. For example, the textile may comprise a non-flammable material. In particular, the non-inflammable material may comprise a non-woven material. Injecting the at least a portion of the means for stiffening into the strobel board may further comprise injecting a material into and / or onto the textile, e.g., into and / or onto the strobel board. For example, the material may be injected into and / or onto the non-woven material. Specifically, the material may be injected such into the textile that the material at least partially infiltrates the textile, e.g., the non-woven material. Generally, the (injected) material may comprise polyamide. In addition, or alternatively, the (injected) material may comprise a thermoplastic elastomer. For example, the thermoplastic elastomer may comprise polyether block amide.

[0054] Generally, the at least portion of the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening is located in a forefoot region of the strobel board. In addition, or alternatively, the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening is located in a midfoot region of the strobel board. For example, the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening extends from the forefoot portion of the strobel board to a midfoot region of the strobel board. Injecting the means for stiffening into a midfoot region of the strobel board enables the provision of a midfoot stiffness of the strobel board, thereby improving the propulsion and / or energy return of the shoe and thus optimizes the performance of an athlete. Moreover, injecting the means for stiffening into the strobel board such that the means for stiffening extends from the forefoot portion of the strobel board to the midfoot portion of the strobel board allows for the simultaneous stiffening of the forefoot portion of the strobel and the midfoot portion of the strobel. The simultaneously provision of forefoot and midfoot stiffness of the strobel maximizes the propulsion and / or energy return of the shoe and thus optimizes the performance of the athlete.

[0055] In addition, or alternatively, at least a portion of the means for stiffening may be casted and / or poured onto the strobel board. For example, the means for stiffening may be casted and / or poured onto a side of the strobel board adapted to receive a foot. In addition, or alternatively, the means for stiffening may be casted and / or poured onto a side of the strobel board opposite to the side of the strobel board adapted to receive a foot.

[0056] Specifically, casting and / or pouring the means for stiffening onto the strobel board may comprise casting and / or pouring a material onto the strobel board. For example, the material may comprise polyurethane.

[0057] Generally, the strobel board may comprise a non-woven material. In addition, or alternatively, the strobel board may comprise a knitted material. For example, the strobel board may be a knitted strobel board. In some embodiments, the strobel board may comprise a woven material. Generally, the strobel board may comprise a non-flammable material. In addition, or alternatively, the strobel board may comprise a material with a limited stretchability. For example, the strobel board may comprise an essentially non-stretchable material. For example, a strobel board comprising a material with a limited stretchability facilitates an application of a strobel stitch, e.g., stitching the strobel board to a shoe.

[0058] Generally, the means for stiffening may be attached to and / or injected into the strobel board such that a boundary of the means for stiffening and a boundary of the strobel board are spaced apart. Spacing apart the boundary of the means for stiffening and the boundary of the strobel board may comprise that the boundary of the means for stiffening and the boundary of the strobel board are separated by a distance. In particular, the boundary of the means for stiffening and the boundary of the strobel board may be spaced apart such that the distance between the boundary of the means for stiffening and the boundary of the strobel board is essentially uniform along the boundary of the means for stiffening and / or the boundary of the strobel board.

[0059] For example, the distance between the boundary of the means for stiffening and the boundary of the strobel board may be at least 5 mm, preferably at least 10 mm, more preferably at least 15 mm, more preferably at least 20 mm, most preferably at least 25 mm. In addition, or alternatively, the distance between the boundary of the means for stiffening and the boundary of the strobel board may at most 10 cm, preferably at most 8 cm, more preferably at most 6 cm, even more preferably at most 4 cm, most preferably at most 2 cm. In some embodiments, the distance between the boundary of the means for stiffening and the boundary of the strobel board may at most 1.5 cm, preferably at most 1 cm, more preferably at most 0.8 cm, even more preferably at most 0.6 cm, most preferably at most 0.4 cm.

[0060] In general, the shape and / or the size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a portion of the strobel board. For example, the shape and / or size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a forefoot portion of the strobel board. In addition, or alternatively, the shape and / or size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a midfoot portion of the strobel board. For example, the shape and / or the size of the means for stiffening may be rescaled such as to space apart the boundary of the means for stiffening and the boundary of the strobel board. For example, the shape and / or the size of the means for stiffening may comprise a rescaling of a shape and / or a size of a portion of the strobel board by a factor of at least 0.8, preferably at least 0.85, more preferably at least 0.9, even more preferably at least 0.92, most preferably at least 0.95.

[0061] In some embodiments, the means for stiffening may be at least partially attached to the insole of the shoe. In particular, the means for stiffening may be attached to a side of the insole adapted to face the strobel of the shoe. In addition, or alternatively, the means for stiffening may be attached to a side of the insole adapted to face a midsole of the shoe.

[0062] For example, the side of the insole adapted to face a midsole of the shoe may comprise a side of the insole opposite to the side of the insole adapted to face the strobel of the shoe. Specifically, the means for stiffening may be injected into the insole of the shoe. In addition, the means for stiffening may be cemented and / or glued to the insole of the shoe. For example, the insole of the shoe may comprise a sockliner. In particular, the means for stiffening may be injected and / or cemented and / or glued to the sockliner such that the means for stiffening are arranged at a side of the sockliner adapted to face a midsole of the shoe.

[0063] Specifically, the means for stiffening may be attached to and / or injected into a portion of the insole, e.g., a midfoot portion of the insole and / or a forefoot portion of the insole. Generally, an area may be associated with the means for stiffening. For example, the area associated with the means or stiffening may comprise an area of the portion of the insole to which the means for stiffening has / have been attached and / or an area of the portion of the insole into which the means for stiffening has / have been injected. Specifically, the area associated with the means for stiffening may be at least 40%, preferably at least 50% more preferably at least 60%, even more preferably at least 70%, most preferably at least 80% of a corresponding area of the insole. For example, the corresponding area of the insole, e.g., the area of the insole corresponding to the area of the means for stiffening, may comprise an area of a portion of the insole that surrounds and / or encompasses the means for stiffening. In particular, the portion of the insole that surrounds and / or encompasses the means for stiffening may surround and / or encompass the means for stiffening from a beginning of the means for stiffening to an end of the means for stiffening. In some embodiments, the beginning of the means for stiffening may be located in a forefoot portion of the insole. In addition, the end point of the means for stiffening may be located in a mid-foot region and / or heel region of the insole.

[0064] For example, a shoe, e.g., a sports shoe, may be associated with at least two insoles. For example, a first insole may be associated with a first stiffness and a second insole may be associated with a second stiffness. Specifically, the insole and / or the shoe may be adapted such that the insoles can be interchanged. For example, the shoe may initially comprise the first insole, e.g., the first insole may be arranged within a cavity of the shoe. Then, the first insole may be taken out of the shoe, e.g., taken out through an ankle opening of the shoe. After the first insole has been taken out of the shoe, the second insole may be inserted into the cavity of the shoe, e.g., inserted through the ankle opening of the shoe. Generally, a first means for stiffening may be attached to and / or injected into the first insole. The first means for stiffening may be attached to and / or injected into a side of the first insole adapted to face a midsole of the shoe. For example, the first means for stiffening may be adapted such as to increase a stiffness and / or propulsion of the shoe, e.g., of the shoe comprising the first insole. In addition, the second insole may not comprise means for stiffening the insole, e.g., no additional material for stiffening the insole may be attached to and / or injected into the second insole. In other words, the stiffness associated with the second insole corresponds to a stiffness of a typical, e.g., unstiffened, insole.

[0065] Associating the shoe, e.g., the sports shoe, with at least two (interchangeable) insoles, e.g., insoles with a different stiffness, allows adapting the stiffness of the shoe to the particular and individual needs of the athlete. For example, in a first situation where a flexible (low stiffness) and cushioned shoe is preferred, the athlete can select an insole from the at least two insoles that is associated with a low stiffness and / or without an additional stiffening means.

[0066] A second aspect of the present invention relates to a shoe, preferably a sports shoe. The shoe comprises the sole element according to one of the above-described embodiments.Short description of the figures

[0067] In the following, exemplary embodiments of the invention are described with reference to the figures. The figures show: Fig. 1A :strobel board comprising a stiffening plate arranged inside a closed pocket, wherein the pocket is closed via a hook-and-loop fastener; Fig. 1B :strobel board comprising a stiffening plate, wherein a part of the stiffening plate is arranged outside of the opened pocket; Fig. 2 :strobel board comprising a stiffening plate, wherein the stiffening plate is attached to the strobel board via stitching; Fig. 3 :strobel board comprising a stiffening plate, wherein the stiffening plate is attached to the strobel board via gluing; Fig. 4A :strobel board, wherein at least a portion of the means for stiffening is / are injected into a forefoot portion of the strobel board; Fig. 4B :strobel board, wherein at least a portion of the means for stiffening is / are injected such into the strobel board that the means for stiffening extend from the forefoot portion to a midfoot portion of the strobel board; Fig. 4C: strobel board, wherein at least a portion of the means for stiffening is / are injected such into the strobel board that a centre portion of the means for stiffening is located at a midfoot portion of the strobel board; Fig. 5A: schematic illustration of a strobel board comprising a stiffening plate arranged inside a pocket of the strobel board; Fig. 5B: schematic illustration of the strobel board illustrating the insertion of the stiffening plate into the pocket of the strobel board; Fig. 5C: schematic illustration of an exemplary embodiment of a stiffening plate adapted to be received in the pocket of the strobel board. Detailed description of preferred embodiments

[0068] In the following, only some possible embodiments of the invention are described in detail. It is to be understood that these exemplary embodiments can be modified in a number of ways and combined with each other whenever compatible and that certain features may be omitted in so far as they appear dispensable.

[0069] Fig. 1A and 1B illustrate an exemplary embodiment of sole element 100 adapted to be arranged in a shoe. The sole element 100 comprises a stiffening plate 110, a strobel board 120 and a pocket 130. The strobel board 110 comprises a non-woven material. The pocket 130 is arranged in a region 105a of the sole element 100 adapted to receive a forefoot. In some embodiments, the pocket 130 may be arranged in the region 105a of the sole element 100 such as to extend at least partially into a region 105b of the sole element 100 adapted to receive a midfoot. In addition, the pocket 130 may be arranged in the region 105a of the sole element 100 such as to extend at least partially into the region 105b and a region 105c of the sole element 100 adapted to receive a rearfoot. The pocket 130 is attached to the strobel board 120 on a side of the strobel board 120 adapted to face an inside of a shoe. In particular, a portion of a boundary and / or an outer region of the pocket 130 is attached to the strobel board 120.

[0070] The size and the shape of the boundary and / or outer region of the pocket 130 essentially follows the size and the shape of the strobel board 130 in the forefoot region 105 of the sole element. The pocket 130 comprises an opening 132. A width of the opening 132 essentially corresponds to a width associated with the strobel board 120 in a region associated with the opening 132.

[0071] As illustrated in Fig. 1B, the pocket 130 is adapted to receive the stiffening plate 110. In particular, the size and the shape of the pocket 130 is such that the cavity formed by the pocket 130 can receive the stiffening element 110. For example, the size and the shape of the pocket 130 essentially corresponds to the size and the shape of the stiffening plate 110. Specifically, the stiffening plate 110 comprises two recesses 115a, 115b, e.g., a first recess 115a in a rear portion of the stiffening plate 110 and a second recess 115b in a front portion of the stiffening plate. In particular, the pocket 130 is adapted such that the cavity formed by the pocket essentially mirrors the recess 115b of the stiffening plate 110. For example, a portion of the pocket 130 corresponding to the recess 115b is attached to the strobel board 120. In particular, the portion of the pocket 130 corresponding to the recess 115b is attached to the strobel board 115b such as to exclude the portion from the cavity formed by the pocket 130.

[0072] The pocket 130 further comprises a hook-and-loop fastener 134. Fig. 1A illustrates the hook-and-loop fastener 134 in a closed configuration and Fig.1B illustrates the hook-and-loop fastener 134 in an open configuration. The hook-and-loop fastener 134 is adapted to open and / or to close at least a portion of the pocket 130. In particular, the hook-and-loop fastener is adapted to close the at least a portion of the pocket 130 such as to prevent a (unintended) removing of the stiffening plate 110 from the pocket. In addition, the hook-and-loop fastener 134 is adapted to open the at least a portion of the pocket 130 such as to enable a (intended) removing and / or exchanging of the stiffening plate 110. Specifically, the first recess 115a in the rear region of the stiffening plate 110 and the hook-and-loop fastener 134 are configured such that the hook-and-loop fastener 134 can be closed through the recess 115b. In particular, the first recess 115a in the rear region of the stiffening plate 110 and the hook-and-loop fastener 134 are configured such that the hook side (loop side) of the hook-and-loop fastener 134 contacts the opposing loop side (hook side) of the hook-and-loop fastener 134 through the recess 115b.

[0073] Fig. 2 illustrates an exemplary embodiment of a sole element 200, wherein the sole element 200 comprises a stiffening plate 210 and a strobel board 220. The strobel board 220 comprises a non-woven material. The stiffening plate 210 is arranged at a portion 205a of the sole element 200 adapted to receive a forefoot. In some embodiments, the stiffening plate 210 may be arranged in the region 205a of the sole element 200 such as to extend at least partially into a region 205b of the sole element 200 adapted to receive a midfoot. In addition, the stiffening element 210 may be arranged in the region 205a of the sole element 200 such as to extend at least partially into the region 205b and a region 205c of the sole element 200 adapted to receive a rearfoot.

[0074] The stiffening element 210 comprises two recesses 215a, 215b, e.g., a first recess 215a in a rear portion of the stiffening plate 210 and a second recess 215b in a front portion of the stiffening plate 210. The stiffening plate 210 is attached to the strobel board 220. In particular, the stiffening plate 210 is attached to the strobel board 220 by a stitching 230. Specifically, the stiffening plate 210 is attached to the strobel board 220 by the stitching 230 essentially along the complete boundary and / or outer region of the stiffening plate 210. In some embodiments, the stiffening plate 210 may be attached to the strobel board 220 by a stitching 230 along a portion of the boundary and / or outer region of the stiffening plate. For example, the stiffening plate 210 may be attached to the strobel board 220 by a stitching 230 only along a lateral boundary and / or a medial boundary of the stiffening plate 210, e.g., the stiffening plate 210 may not be stitched to the strobel board 220 along a portion of the boundary and / or outer region of the stiffening plate 210 associated with the recess 215a and / or the recess 215b.

[0075] Fig. 3 illustrates an exemplary embodiment of a sole element 300, wherein the sole element 300 comprises a stiffening plate 310 and a strobel board 320. The strobel board 320 comprises a non-woven material. The stiffening plate 310 is arranged at a portion 305a of the sole element 300 adapted to receive a forefoot. In some embodiments, the stiffening plate 310 may be arranged in the region 305a of the sole element 300 such as to extend at least partially into a region 305b of the sole element 300 adapted to receive a midfoot. In addition, the stiffening element 310 may be arranged in the region 305a of the sole element 300 such as to extend at least partially into the region 305b and a region 305c of the sole element 300 adapted to receive a rearfoot. The stiffening element 310 comprises two recesses 315a, 315b, e.g., a first recess 315a in a rear portion of the stiffening plate 310 and a second recess 315b in a front portion of the stiffening plate 310. The stiffening plate 310 is attached to the strobel board 320. In particular, the stiffening plate 310 is attached to the strobel board 320 by gluing the stiffening plate 310 to the strobel board 320.

[0076] Fig. 4A illustrates an exemplary embodiment of a sole element 400, wherein the sole element 400 comprises means for stiffening 410 at least a portion of the sole element 400. The means for stiffening 410 at least a portion of the sole element are located in a region 405a adapted to receive a forefoot. The sole element 400 further comprises a strobel board 420. The strobel board 420 may comprise a non-woven material. In some embodiments the strobel board may comprise a knitted and / or woven material. The means for stiffening 410 is / are injected into the strobel board 420. For example, the means for stiffening 410 may be injected such into the strobel board 420 as to infiltrate at least a portion of the strobel board 420, e.g., the strobel board material. In particular, the means for stiffening 410 may comprise polyamide and / or a thermoplastic elastomer, e.g., polyether block amide.

[0077] A shape of the means for stiffening 410 essentially follows a shape of the strobel board 420. In particular, the shape of the means for stiffening 410 in the region 405a essentially follows the shape of the strobel board 420 in the region 405a. Specifically, at least a portion of a boundary and / or outer region of the means for stiffening 410 follows the boundary and / or outer region of the strobel board 420. Generally, the means for stiffening 410 may be adapted and / or arranged such that the boundary of the means for stiffening 410 is at distance to the boundary of the strobel board 420. For example, the distance between the boundary of the means for stiffening 410 and the strobel board 420 may be comprise a distance δ. Adapting and / or arranging the means for stiffening 410 such that the boundary of the means for stiffening 410 is at distance to the boundary of the strobel board 420 may comprise that a distance between the boundary of the means for stiffening 410 and the strobel board 420 is essentially uniform along the boundary of the means for stiffening 420 and / or along the boundary of the strobel board 410. For example, the uniform distance may comprise the distance δ. In some embodiments, the means for stiffening 410 may be adapted such as to essentially correspond to a rescaling of a portion of the strobel board 420. For example, the means for stiffening 410 may be adapted such as to correspond to a rescaling of a portion of the strobel board 420 in a forefoot region 405a. In particular, the means for stiffening 410 may be rescaled such that the boundary of the means for stiffening 410 is at a distance δ to the boundary of the strobel board 420. The rescaling of the (complete) strobel board 420 is indicated by the dotted line 402. In particular, a distance between the rescaled strobel board 402 (dotted line) and the boundary of the (not rescaled) strobel board 420 is δ.

[0078] Figure 4B illustrates a further exemplary embodiment of the sole element. The sole element 100 comprises the strobel board 420 and means for stiffening 410 at least a portion of the strobel board 420. In particular, the means for stiffening 410 is / are attached to and / or injected into a forefoot portion 405a of the strobel board 420 and attached to and / or injected into a midfoot portion 405b of the strobel board 420. In addition, the means for stiffening is / are attached to and / or injected into a rearfoot / heel portion 405c of the strobel board 420. In particular, the means for stiffening 410 is / are attached to and / or injected into the strobel board 420 such as to extend from the forefoot portion 405a of the strobel board 420 to the rearfoot / heel portion 405c of the strobel board 420.

[0079] Figure 4C illustrates a further exemplary embodiment of the sole element. The sole element 100 comprises the strobel board 420 and means for stiffening 410 at least a portion of the strobel board 420. The means for stiffening 410 is / are attached to and / or injected into the strobel board 420 such that a centre portion 414 of the means for stiffening 410 is located in a midfoot portion 405b of the strobel board 420. Specifically, the means for stiffening 410 extend(s) towards the forefoot portion 405a of the strobel board 420. In addition, the means for stiffening 410 extend(s) towards the rearfoot / heel portion 405c of the strobel board 420. In particular, two fingers 418a, 418b extend from the centre portion 414 of the means for stiffening 410 towards the forefoot portion 405a of the strobel board. Similarly, two fingers 418c, 418d extend from the centre portion 414 of the means for stiffening 410 towards the rearfoot / heel portion 405c of the strobel board 410. Generally, the fingers 418a, 418b, 418c, 418d extend from the centre portion 414 such as to follow a (imaginary) boundary 402. For example, the (imaginary) boundary may comprise a rescaled boundary of the strobel board 410.

[0080] Figure 5A illustrates an exemplary embodiment of the sole element. The sole element comprises a strobel board 520 and a pocket 530 is arranged at the strobel board 520. For example, the pocket 530 may be comprised within the strobel board 520, e.g., the strobel board 520 and the pocket 530 may be one piece. In addition, or alternatively, the pocket 530 may be attached to the strobel board 520, e.g., the pocket 520 may be stitched and / or glued to the strobel board 520. The pocket is arranged on a side of the strobel board 520 adapted to face an insole and / or a foot. The pocket 530 is adapted to receive a stiffening element 510. In the situation illustrated in Fig. 5A, the stiffening element 510 is arranged within the pocket 530, e.g., the stiffening element 510 has been inserted into the pocket 530. In particular, the pocket 530 is arranged in a forefoot portion 505a of the strobel board 520, e.g., a portion of the strobel board 520 adapted to receive a forefoot. The size and / or the shape of the pocket 530 is based on the size and / or shape of the stiffening element 510. Specifically, the pocket 530 comprises a finger 534, extending and / or emerging from a base portion of the pocket 530. For example, the finger 534 of the pocket 530 may extend and / or emerge from the base portion of the pocket such as to extend towards a toe region of the strobel board 520. In particular, the size and / or the shape of the finger 534 is adapted such that the finger 534 can receive the finger 512 of the stiffening element 510 (see Fig. 5B or 5C).

[0081] Figure 5B illustrates a situation where the stiffening element 510 is not (yet) arranged in the pocket 530 of the strobel board 520. Specifically, the stiffening element 510 can be inserted into the pocket 530 of the strobel board 520 through the opening 532 of the pocket 530. For example, the stiffening element 510 can be inserted into the pocket 530 through the opening 532 by moving the stiffening element 510 into the direction m, e.g., by moving the stiffening element 510 towards (and through) the opening 532 of the pocket 530. In particular, the stiffening element can be moved and / or shifted such that the finger 512 of the stiffening element 510 is received by the finger 534 of the pocket 530.

[0082] Figure 5C illustrates the exemplary stiffening element 510. The stiffening element 510 comprises a finger 512 extending and / or emerging from a base portion of the stiffening element 510. The base portion of the stiffening element 510 comprises a plurality of apertures 514a, 514b, 514c, 514d and a plurality of ribs 516a, 516b, 516c. In particular, the apertures 514a, 514b, 514c, 514d are separated by the ribs 516a, 516b, 516c. For example, the aperture 514b is separated from the aperture 514c by the rib 516b. The apertures 514a, 514b, 514c, 514d comprise an elliptical shape. Specifically, a semi-major axis of the elliptical shape of the apertures514a, 514b, 514c, 514d is essentially parallel to an elongation direction of the strobel board 520. In some embodiments, the apertures 514a, 514b, 514c, 514d of the stiffening element 510 may comprise different shapes and / or sizes. For example, the aperture 514a may comprise a first shape and / or size and the aperture 514b may comprise a second shape and / or size.Further Embodiments:

[0083] Embodiment 1: A sole element (100) adapted to be arranged in a shoe, preferably a sports shoe, wherein: the sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot, the sole element (100) is adapted to be arranged in the shoe when wearing the shoe, and the sole element (100) is a strobel board (120) and / or an insole.

[0084] Embodiment 2: The sole element (100) according to Embodiment 1, wherein the means for stiffening (110) at least a portion of the sole element is / are adapted to: stiffen at least a portion (105a) of the shoe adapted to receive a forefoot; and / or stiffen at least a portion (105b) of the shoe adapted to receive a midfoot; preferably wherein the means for stiffening is / are arranged such as to extend from the portion (105a) of the shoe adapted to receive a forefoot towards the portion (105b) of the shoe adapted to receive a midfoot.

[0085] Embodiment 3: The sole element (100) according to Embodiment 2, wherein to stiffen at least a portion of the shoe adapted to receive a forefoot and / or a midfoot comprises to increase the propulsion and / or to reduce a stud pressure associated with the shoe.

[0086] Embodiment 4: The sole element (100) according to one of the Embodiments 1 to 3, wherein the sole element (100) is arranged in the shoe such that at least a portion (110) of the sole element (100) is exchangeable, preferably wherein at least a portion of the means for stiffening (110) is exchangeable.

[0087] Embodiment 5: The sole element (100) according to Embodiment 4, wherein the at least a portion (110) of the sole element which is exchangeable is adapted to be exchanged and / or removed through an opening of the shoe, preferably an ankle opening of the shoe.

[0088] Embodiment 6: The sole element (100) according to one of the Embodiments 1 to 5, wherein the means for stiffening (110) comprise(s) a pocket (130) adapted to receive a stiffening element (110), preferably wherein the pocket (130) is adapted to receive the stiffening element (110) through an opening (132).

[0089] Embodiment 7: The sole element (100) according to Embodiment 6, wherein: the pocket (130) is comprised within the strobel board (120), and / or the pocket (130) is at least partially attached to the strobel board (120), prefer- ably wherein the pocket (130) is attached to the strobel board (130) via stitching and / or knitting.

[0090] Embodiment 8: The sole element (100) according to Embodiment 6 or 7, wherein the pocket (130) is arranged on a side of the strobel board (120) adapted to face an inside of the shoe.

[0091] Embodiment 9: The sole element (100) according to one of the Embodiments 6 to 8, wherein the pocket (130) comprises means for fixing (134) the stiffening element (110), preferably wherein the means for fixing (134) comprises a hook-and-loop fastener.

[0092] Embodiment 10: The sole element (100) according to one of the Embodiments 1 to 9, wherein the means for stiffening (110) comprises a stiffening plate.

[0093] Embodiment 11: The sole element (100) according to Embodiments 1 to 10, wherein the means for stiffening (110) comprise(s) a stiffening element (110) which is at least partially attached to the strobel board. Embodiment

[0094] Embodiment 12: The sole element (200, 300) according to Embodiment 11 wherein the stiffening element (210, 310) is attached to the strobel board by gluing and / or stitching (230).

[0095] Embodiment 13: The sole element (400) according to one of the Embodiments 1 to 12, wherein at least a portion of the means for stiffening (410) is injected into the strobel board (420).

[0096] Embodiment 14: The sole element (100) according to one of the Embodiments 1 to 13, wherein the strobel board (120) comprises a non-woven material.

[0097] Embodiment 15: The sole element according to one of the Embodiments 1 to 14, wherein the means for stiffening is / are at least partially attached to the insole of the shoe, preferably wherein the means for stiffening is / are attached to a side of the insole adapted to face the strobel of the shoe and / or a midsole of the shoe.

[0098] Embodiment 16: A shoe, preferably a sports shoe, comprising the sole element (100) according to one of the Embodiments 1 to 15.

Examples

embodiment 1

[0083] A sole element (100) adapted to be arranged in a shoe, preferably a sports shoe, wherein:

the sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot, the sole element (100) is adapted to be arranged in the shoe when wearing the shoe, and the sole element (100) is a strobel board (120) and / or an insole.

[0084]Embodiment 2: The sole element (100) according to Embodiment 1, wherein the means for stiffening (110) at least a portion of the sole element is / are adapted to:

stiffen at least a portion (105a) of the shoe adapted to receive a forefoot; and / or stiffen at least a portion (105b) of the shoe adapted to receive a midfoot; preferably wherein the means for stiffening is / are arranged such as to extend from the portion (105a) of the shoe adapted to receive a forefoot towards the portion (105b) of the shoe ada...

embodiment 16

[0098] A shoe, preferably a sports shoe, comprising the sole element (100) according to one of the Embodiments 1 to 15.

Field of the invention

[0001] The present invention relates to sole elements adapted to be arranged in a shoe, preferably a sports shoe. The sole element is a strobel board and / or an insole. The sole element comprises means for stiffening at least a portion of the sole element, wherein the at least a portion of the sole element is located in a region adapted to receive a forefoot. The sole element is adapted to be arranged in the shoe when wearing the shoe.Technical background

[0002] Aiming to maximize the performance of an athlete is at the very heart of the development and evolution of sporting goods. This especially applies to sport shoes, e.g., running shoes, where the performance of the athlete crucially depends on the performance of the shoe. Therefore, a lot of effort has been made to optimize the performance of sport shoes, particularly running shoes.

[0003] An important benchmark for the assessment of the performance of a shoe is the energy return and / or the propulsion of the shoe. For example, the energy return and / or the propulsion of the shoe can be steered by a stiffness of the shoe. In particular, a higher energy return and / or a higher propulsion can be achieved by increasing the stiffness of the shoe.

[0004] Typically, a shoe is manufactured with a predefined stiffness, which cannot be adapted after completion of the manufacturing process, thereby rendering the stiffness, the energy return and / or the propulsion a permanent property of the shoe. However, different athletes prefer different stiffness of the shoe, and the performance of an athlete can be significantly diminished when the stiffness of the shoe does not match the particular preferences of the athlete.

[0005] DE 100 00 207 A1 relates to a footbed having an elastically deformable stiffening insert for correcting the foot when the tread of a shoe equipped with this footbed contacts the ground, characterized in that the stiffening insert is designed for elastically deforming the footbed into a correction position when the tread of the shoe is partially in contact with the ground.

[0006] DE 10 2010 028 889 A1 is directed to a shoe insole, characterized in that the shoe insole has a stiffening area which comprises at least one area of the shoe insole which, when the foot is in contact with the insole, extends substantially diagonally from the talus and navicular bone to the metatarsal head IV and / or V, wherein the stiffening area is arched against the sole of the foot in the area of the talus and navicular bone when the foot is in contact with the insole and the shoe insole has a raised area, wherein, when the foot is in contact with the insole, at least the area from the metatarsal head III to the metatarsal head V is raised relative to the bearing surface of the metatarsophalangeal joint of the big toe.

[0007] EP 4 066 671 A1 describes a sole for a shoe, comprising a sole body and elongated structures arranged on or in the sole body at least in a forefoot area for the transverse stiffening of the sole, wherein the elongated structures are arranged with their longitudinal axes transverse to the longitudinal direction of the sole.

[0008] Therefore, there is a need for new technologies for changing and improving the performance of shoes, particularly sports shoes, addressing at least some of the above-described disadvantages of the prior art and further improving other aspects.Summary of the invention

[0009] A first aspect of the present invention relates to a sole element adapted to be arranged in a shoe, preferably a sports shoe. The sole element is a strobel board and / or an insole and the sole element comprises means for stiffening at least a portion of the sole element. Specifically, the at least a portion of the sole element is located at least in a region adapted to receive a forefoot. In addition, the sole element is adapted to be arranged in the shoe when wearing the shoe.

[0010] For example, the strobel board and / or the insole may be adapted to be arranged in the shoe. Being adapted to be arranged in the shoe may comprise that the sole element is fixedly attached to the shoe. For example, the sole element may be arranged in the shoe such as to be an integral part of the shoe. Specifically, the sole element may be permanently attached to at least a part of the shoe, e.g., an upper of the shoe and / or a midsole of the shoe. In particular, the strobel board may be arranged in the shoe such as to be an integral part of the shoe. In addition, or alternatively, being adapted to be arranged in the shoe may comprise that the sole element is configured such that the shole element can be received by the shoe. For example, a size and / or a geometry and / or a thickness of the sole element may be such that the shoe can receive the sole element. Specifically, the insole may be adapted such that the insole can be received by the shoe, e.g., by placing the insole inside the shoe.

[0011] The sole element comprises means for stiffening at least a portion of the sole element. The means for stiffening may comprise at least one means for stiffening the at least a portion of the sole element. The means for stiffening may be adapted such that the at least portion of the sole element that is stiffen by the means for stiffening is located in a region adapted to receive a forefoot. The region adapted to receive the forefoot may comprise a region that receives at least a portion of the forefoot when the sole element is arranged in the shoe. For example, the forefoot region may comprise a region associated with a toe and / or phalanges of the foot.

[0012] Being adapted to be arranged in the shoe when wearing the shoe may comprise that the sole element is arranged in the shoe when an athlete is wearing the shoe for performing (athletic) activities. In other words, the sole element may be adapted to be arranged in the shoe at least during a (typical) use of the shoe, e.g., performing (athletic) activities such as walking and / or running.

[0013] Stiffening at least a portion of the sole element located in a region adapted to receive a forefoot allows for an adaption of the forefoot stiffness of the sole element. Adapting the forefoot stiffness of the sole element enables a localized and specific adaption of the responsiveness and / or an energy return of a shoe comprising the sole element. Thereby, the forefoot stiffness and / or the responsiveness of the shoe can be adapted to the athletes needs and thus optimizes the performance of the athlete and enhances the wearing comfort of the shoe.

[0014] Generally, the means for stiffening at least a portion of the sole element may be adapted to stiffen at least a portion of the shoe adapted to receive a forefoot. In addition, or alternatively, the means for stiffening at least a portion of the sole element may be adapted to stiffen at least a portion of the shoe adapted to receive a midfoot. Specifically, the means for stiffening may be arranged such as to extend from a portion of the shoe adapted to receive a forefoot towards the portion of the shoe adapted to receive a midfoot.

[0015] In some embodiments, to stiffen at least a portion of the shoe adapted to receive a forefoot and / or a midfoot may comprise to increase the propulsion associated with the shoe. In addition, or alternatively, to stiffen at least a portion of the shoe adapted to receive a forefoot and / or midfoot may comprise to reduce a stud pressure associated with the shoe.

[0016] For example, the means for stiffening may be arranged such that, when the sole element is arranged in the shoe, the means for stiffening also stiffen(s) a portion of the shoe adapted to receive a portion of the forefoot. In other words, the means for stiffening may stiffen the portion of the sole element and the portion of the shoe. For example, the stiffening of the portion of the shoe may be based on the stiffening of the portion of the sole element. In particular, the stiffening of the portion of the sole element by the means for stiffening may induce, when the sole element is arranged in the shoe, a stiffening of the portion of the shoe. The at least a portion of the shoe stiffened by the means for stiffening may essentially correspond to the at least a portion of the sole element stiffened by the means for stiffening. Alternatively, the at least a portion of the shoe stiffened by the means for stiffening may be a sub-portion of the at least a portion of the sole element stiffened by the means for stiffening. Alternatively, the at least a portion of the shoe stiffened by the means for stiffening may be a super-portion of the at least a portion of the sole element stiffened by the means for stiffening.

[0017] The means for stiffening may stiffen the at least a portion of the sole element and / or the shoe such as to increase the propulsion associated with the shoe. For example, the propulsion associated with the shoe may comprise an energy return associated with the shoe. Specifically, by stiffening the at least a portion of shoe adapted to receive a forefoot, the energy return of the shoe can be increased. Particularly, an energy return of the shoe associated with the forefoot region can be increased. Increasing the energy return associated with the forefoot region of the shoe minimized the energy loss of the shoe and thereby optimizes the performance of an athlete wearing the shoe. For example, an enhanced energy return of the portion of the shoe adapted to receive the forefoot may be particularly advantageous for athletes performing forefoot running.

[0018] In addition, or alternatively, the means for stiffening may stiffen the at least a portion of the sole element and / or the shoe such as to reduce the stud pressure associated with the shoe. Reducing the stud pressure associated with the shoe may comprise reducing a pressure and / or force that a stud may exert on the sole element and / or the shoe based on a weight of the athlete wearing the shoe. Specifically, the stiffening of the at least a portion of the sole element and / or the shoe may allow for distributing the force which the stud exerts on the shoe and / or sole element and / or foot over a larger region and thereby minimizing the pressure (force per area). Thus, stiffening the at least a portion of the sole element and / or shoe enhances the wearing comfort of the shoe comprising the sole element and thereby contribute to an optimized performance of the athlete. In particular, the reduced stud pressure and the increased propulsion and / or energy return generate a synergistic effect of enabling the athlete wearing the shoe to achieve optimum performance.

[0019] In general, the sole element may be arranged in the shoe such that at least a portion of the sole element is exchangeable. In particular, the at least a portion of the sole element which is exchangeable may comprise the means for stiffening.

[0020] Arranging the sole element in the shoe such that at least a portion of the sole element is exchangeable may comprise that the at least portion of the sole element can be exchanged without substantially affecting other components of the sole element and / or the shoe. For example, the at least a portion of the sole element may be not permanently fixed to other components of the shoe and / or midsole, e.g., not fixed to other components via gluing and / or stitching. In addition, or alternatively, arranging the sole element in the shoe such that at least a portion of the sole element is exchangeable may comprise that the at least portion of the sole element can be exchanged based on the athlete's needs. Generally, the at least a portion of the sole element which is exchangeable may be located in a region adapted to receive a forefoot. In some embodiments, the at least a portion of the sole element that is exchangeable may comprise essentially the sole element, e.g., the sole element itself may be exchangeable. For example, when the sole element comprises the insole, the sole element may be exchangeable.

[0021] By arranging the sole element such that at least a portion of the sole element is exchangeable, preferably a portion the means for stiffening, the stiffness of the sole element and / or the shoe may be steered based on the athlete's needs. In particular, the at least a portion of the means for stiffening which is / are exchangeable may be exchanged and / or replaced by a different at least a portion of the means for stiffening. In other words, a first portion of the means for stiffening may be exchanged and / or replaced by a second portion of the means for stiffening.

[0022] Specifically, the first portion of the means for stiffening and the second portion of the means for stiffening may comprise different stiffening properties, e.g., the first portion may comprise first stiffening properties and the second portion may comprise second stiffening properties. In particular, the first stiffening properties of the first portion may be such as to induce a first stiffness of the sole element and / or the shoe. In addition, or alternatively, the second stiffening properties of the second portion may be such as to induce a second stiffness of the sole element and / or the shoe. For example, the second stiffening properties of the second element may be such that at least a portion of the sole element and / or shoe comprising the second element is stiffer than at least a portion of the sole element and / or shoe comprising the first portion.

[0023] Specifically, the at least a portion of the sole element which is exchangeable may be adapted to be exchanged and / or removed through an opening of the shoe. For example, the at least a portion of the sole element which is exchangeable may be adapted to be exchanged and / or removed through an ankle opening of the shoe.

[0024] Exchanging and / or removing the at least a portion of the sole element through an opening of the shoe allows for an easy and fast exchange of the at least a portion of the sole element. Specifically, exchanging and / or removing the at least a portion of the sole element through an ankle opening of the shoe allows for exchanging and / or removing the at least a portion of the sole element through a natural, e.g., an opening that a shoe necessarily has, opening of the shoe. In other words, when the at least a portion of the sole element is exchanged and / or removed through the ankle opening of the shoe, no further and / or additional openings must be introduced into the shoe, e.g., further and / or additional openings in a midsole of the shoe. Thereby, the manufacturing process of the shoe may be simplified and accelerated. In addition, the stability of the shoe may be increased as no further openings, i.e., areas without a material, must be introduced.

[0025] Generally, the means for stiffening may comprise a pocket adapted to receive a stiffening element. In particular, the pocket may be adapted to receive the stiffening element through an opening.

[0026] The pocket may be located in a region adapted to receive a forefoot. The pocket may comprise a size and / or a geometry such that the pocket can receive the stiffening element. In general, a pocket may comprise and / or define a cavity. For example, the pocket may comprise a size and / or a geometry such that a size and / or geometry of the cavity essentially corresponds to a size and / or a geometry of the stiffening element. The pocket may comprise an opening, e.g., an access to the cavity, through which the stiffening element can be received. Specifically, the pocket may be adapted such that the opening points towards the opening of the shoe, when the sole element is arranged in the shoe. In particular, the pocket may be adapted such that the opening of the pocket points towards the ankle opening of the shoe.

[0027] In addition, the opening of pocket may be such that the stiffening element can be removed from the pocket. In other words, the pocket may be adapted such that the stiffening element can be exchanged. For example, the pocket may receive a first stiffening element comprising first stiffening properties. Afterwards, the first stiffening element may be removed through the opening of the pocket and a second stiffening element comprising second stiffening properties may be received.

[0028] Means for stiffening comprising a pocket adapted to receive a stiffening element enable an efficient and simple exchange and / or replacement of the stiffening element. An efficient and simple exchange and / or replacement of the stiffening element contributes to an optimized adjustment of the propulsion and / or energy return and / or stud pressure of the shoe.

[0029] Specifically, the pocket may be comprised within the strobel board. In addition, or alternatively, the pocket may be at least partially attached to the strobel board. In particular, the pocket may be at least partially attached to the strobel board via stitching. In addition, or alternatively, the pocket may be at least partially attached to the strobel board via knitting.

[0030] For example, the pocket may be an integral part of the strobel board, e.g., the strobel and the pocket may be one piece. For example, a fist portion of the pocket may extend from the strobel board, and a second portion of the pocket may be comprised within the strobel board. Specifically, at least a portion of an inner side of the cavity of the pocket may be formed by the strobel board.

[0031] A pocket which is comprised within the strobel board allows for the use of a one-piece strobel board. A one-piece strobel board enhances the stability of the pocket and contributes to the longevity of the strobel board. In addition, a pocket comprised within the strobel board allows for attaching the pocket to the strobel board without creating seams, thereby contributing to an optimized wearing comfort of the shoe.

[0032] In addition, or alternatively, at least a portion of the pocket may be attached to the strobel board. For example, the pocket may be attached such to the strobel board that a portion of the pocket is formed by the strobel board. In addition, or alternatively, a separate pocket may be attached to the strobel board. In other words, a prefabricated pocket forming a cavity by itself, may be attached to the strobel board.

[0033] Specifically, the pocket may be attached to the strobel board via stitching. For example, the pocket may be attached to the strobel board via stitching an outer region and / or a boundary region of the pocket to the strobel. In addition, or alternatively, the pocket may be attached to the strobel board via knitting. For example, the pocket may be attached to the strobel board via knitting an outer region and / or a boundary region of the pocket to the strobel.

[0034] Attaching the pocket to the strobel board via stitching and / or knitting allows for a simplified creation of the pocket at the strobel board. In addition, attaching the pocket to the strobel board via stitching and / or knitting enhances the quality of the attachment, e.g., an attachment which is particularly resistant against external forces, thereby contributing to the longevity of the strobel board.

[0035] In some embodiments, the pocket may be arranged on a side of the strobel board adapted to face an inside of the shoe.

[0036] For example, the pocket may be at least partially attached to a side of the strobel board adapted to face an inside of the shoe. In addition, or alternatively, the pocket may be comprised within the strobel board such that at least a portion of the pocket extends from a side of the strobel board adapted to face an inside of the shoe. For example, the pocket may be arranged on a side of the strobel board such that the opening of the pocket is arranged on a side of the strobel board adapted to face the inside of the shoe.

[0037] Facing an inside of the shoe may comprise that at least a portion of the side of the strobel board is covered by components of the shoe. For example, the at least a portion of the side of the strobel board may be covered by an insole. In other words, the side of the strobel board adapted to face an inside of the shoe may be not directly (optically) accessible, e.g., visible through the ankle opening of the shoe, but may be covered by an insole of the shoe.

[0038] Arranging the pocket on a side of the strobel board adapted to face an inside of the shoe enables the arrangement of the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe. Arranging the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe facilitates the exchange of the stiffening element. In particular, arranging the opening of the pocket on a side of the strobel board adapted to face an inside of the shoe ensures that the pocket, e.g., the opening of the pocket, is (directly) accessible through the opening, e.g., the ankle opening, of the shoe. Thereby, a first stiffening element received in the pocket may be removed from the pocket through opening of the pocket and through the ankle opening of the shoe and a second stiffening element may be inserted into the pocket through the ankle opening and the opening of the pocket. Thus, arranging the pocket on a side of the strobel board adapted to face an inside of the shoe optimizes the exchangeability of the portion of the means for stiffening, e.g., the stiffening element.

[0039] In general, the pocket may comprise means for fixing the stiffening element. For example, the means for fixing may comprise a hook-and-loop fastener.

[0040] For example, the means for fixing the stiffening element may comprise means for maintaining the stiffening element within the pocket. Specifically, the means for fixing the stiffening element may comprise means for at least partially closing the opening of the pocket. Generally, the means for fixing may be adapted such that the stiffening element can be unfastened. In other words, the means for fixing the stiffening element may comprise means for reversibly fixing the stiffening element. For example, the means for fixing the stiffening element may comprise a hook-and-loop fastener. In addition, or alternatively, the means for fixing the stiffening element may comprise at least one button, preferably a push button. At least a portion of the means for fixing the stiffening element may be arranged on a side of the strobel board adapted to face an inside of the shoe.

[0041] A pocket comprising means for fixing the stiffening element, e.g., a hook-and-loop fastener for closing at least a portion of the opening of the pocket, allows for fixing and maintaining the stiffening element in an intended and / or preconfigured position. In particular, the means for fixing the stiffening element allows for maintaining the stiffening element within the pocket and thereby ensures that the stiffening element remains within a region of the strobel board adapted to receive a forefoot. Thus, when wearing the shoe, the stiffening element remains within the pocket, stiffens a region of the strobel board and / or shoe adapted to receive a forefoot and thereby maximizes the energy return of the shoe, minimizes the stud pressure associated with the shoe and optimizes the performance of an athlete wearing the shoe.

[0042] Generally, the means for stiffening may comprise a stiffening plate.

[0043] A stiffening plate may comprise that an extension of the stiffening plate in a first direction is substantially smaller than an extension in a second direction. For example, a thickness associated with the stiffening plate may be substantially smaller than a planar extension of the stiffening plate. Specifically, the stiffening plate may comprise a contiguous and / or connected plate. The stiffening plate may comprise at least one recess. In addition, or alternatively, the stiffening plate may comprise at least one aperture.

[0044] Generally, the stiffening plate may be adapted to be received in the pocket of the strobel board. For example, a size and / or shape of the stiffening plate may be configured such as to enable the stiffening plate to be received by the pocket.

[0045] Means for stiffening comprising a stiffening plate enable the stiffening of the strobel board and / or the shoe by an element with a small thickness, thereby minimizing variations of the form of the strobel board when the stiffening plate is placed inside the pocket. In particular, using a stiffening plate minimizes the formation of bulges within the strobel board and / or deformations of the strobel board, when the stiffening plate is placed in the pocket. The minimization the formation of bulges within the strobel board and / or deformations of the strobel board contributes to an optimization of the wearing comfort of the shoe.

[0046] In some embodiments, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board. Specifically, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board by gluing. In addition, or alternatively, the means for stiffening may comprise a stiffening element which is at least partially attached to the strobel board by stitching.

[0047] For example, the stiffening element may be attached to the strobel board at a boundary and / or outer region of the stiffening element. In particular, at least a portion of the boundary and / or outer region of the stiffening element may be sewn and / or stitched to the strobel board. Specifically, the stiffening element may be adapted such that at least a portion of the boundary and / or outer region of the stiffening element follows a portion of the boundary and / or outer region of the strobel board. In other words, a portion of the boundary and / or outer region of the stiffening element may be sewn and / or stitched to a portion of the boundary and / or outer region of the strobel board. In addition, or alternatively, at least a portion of the stiffening element may be attached to the strobel board by gluing. For example, gluing a portion of the stiffening element to the strobel board may comprise that at least a centre portion and / or mid-portion of the stiffening element is glued to the strobel board. In some embodiments, the stiffening element may be glued to the strobel board essentially across the complete surface of the stiffening element facing the strobel board.

[0048] Attaching the stiffening element at least partially to the strobel board by gluing and / or stitching facilitates the attachment of the stiffening element while at the same time guaranteeing a stable attachment, e.g., an attachment resistant against external forces.

[0049] Generally, the stiffening element and / or the stiffening plate may comprise at least one aperture. For example, the stiffening element and / or the stiffening plate may comprise at least 2, preferably at least 3, most preferably at least 4 apertures. Specifically, the at least one aperture may comprise an elliptical geometry. For example, a major-semi axis of the elliptical geometry may be essentially parallel to a direction of elongation of the strobel board and / or shoe. In general, the stiffening element and / or the stiffening plate may comprise a rib-like structure. For example, the at least one aperture of the stiffening element and / or the stiffening plate may be separated by at least one rib. For example, the stiffening element and / or the stiffening plate may comprise at least one, preferably at least two, most preferably at least three ribs. In addition, or alternatively, the stiffening element and / or the stiffening plate may comprise a lattice and / or cell structure.

[0050] A stiffening element and / or stiffening plate with at least one aperture, preferably arranged in a rib- and / or lattice- and / or cell-like structure allows for a sufficient stiffening of the strobel board and the shoe comprising the strobel board while at the same time minimizing the weight of the stiffening element and / or stiffening plate.

[0051] In addition, or alternatively, the stiffening element and / or the stiffening plate may comprise at least one finger. For example, the stiffening element and / or the stiffening plate may be adapted such that the at least one finger extends to medial forefoot portion of the strobel board. In particular, the at least one finger of the stiffening element and / or the stiffening plate may extend such to the medial forefoot portion of the strobel board that the at least one finger is located in a region of the strobel board associated with a hallux of a foot. In addition, or alternatively, the stiffening element and / or the stiffening plate may be adapted such that the at least one finger extends to a lateral and / or central midfoot portion of the strobel board. Generally, the length of the at least one finger may be at least 0.5 cm, preferably at least 1 cm, more preferably at least 1.5 cm, even more preferably at least 2 cm, most preferably at least 2.5 cm.

[0052] In general, at least a portion of the means for stiffening may be injected into the strobel board.

[0053] For example, injecting at least a portion of the means for stiffening into the strobel board may comprise injecting at least a portion of the means for stiffening into a premanufactured strobel board. For example, the at least a portion of the means for stiffening may be injected such into the strobel board as to form an insole board. Specifically, injecting the at least a portion of the means for stiffening into the strobel board may comprise arranging a textile, e.g., the strobel, in a mould. For example, the textile may comprise a non-flammable material. In particular, the non-inflammable material may comprise a non-woven material. Injecting the at least a portion of the means for stiffening into the strobel board may further comprise injecting a material into and / or onto the textile, e.g., into and / or onto the strobel board. For example, the material may be injected into and / or onto the non-woven material. Specifically, the material may be injected such into the textile that the material at least partially infiltrates the textile, e.g., the non-woven material. Generally, the (injected) material may comprise polyamide. In addition, or alternatively, the (injected) material may comprise a thermoplastic elastomer. For example, the thermoplastic elastomer may comprise polyether block amide.

[0054] Generally, the at least portion of the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening is located in a forefoot region of the strobel board. In addition, or alternatively, the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening is located in a midfoot region of the strobel board. For example, the means for stiffening may be injected such into the strobel board that the at least portion of the means for stiffening extends from the forefoot portion of the strobel board to a midfoot region of the strobel board. Injecting the means for stiffening into a midfoot region of the strobel board enables the provision of a midfoot stiffness of the strobel board, thereby improving the propulsion and / or energy return of the shoe and thus optimizes the performance of an athlete. Moreover, injecting the means for stiffening into the strobel board such that the means for stiffening extends from the forefoot portion of the strobel board to the midfoot portion of the strobel board allows for the simultaneous stiffening of the forefoot portion of the strobel and the midfoot portion of the strobel. The simultaneously provision of forefoot and midfoot stiffness of the strobel maximizes the propulsion and / or energy return of the shoe and thus optimizes the performance of the athlete.

[0055] In addition, or alternatively, at least a portion of the means for stiffening may be casted and / or poured onto the strobel board. For example, the means for stiffening may be casted and / or poured onto a side of the strobel board adapted to receive a foot. In addition, or alternatively, the means for stiffening may be casted and / or poured onto a side of the strobel board opposite to the side of the strobel board adapted to receive a foot.

[0056] Specifically, casting and / or pouring the means for stiffening onto the strobel board may comprise casting and / or pouring a material onto the strobel board. For example, the material may comprise polyurethane.

[0057] Generally, the strobel board may comprise a non-woven material. In addition, or alternatively, the strobel board may comprise a knitted material. For example, the strobel board may be a knitted strobel board. In some embodiments, the strobel board may comprise a woven material. Generally, the strobel board may comprise a non-flammable material. In addition, or alternatively, the strobel board may comprise a material with a limited stretchability. For example, the strobel board may comprise an essentially non-stretchable material. For example, a strobel board comprising a material with a limited stretchability facilitates an application of a strobel stitch, e.g., stitching the strobel board to a shoe.

[0058] Generally, the means for stiffening may be attached to and / or injected into the strobel board such that a boundary of the means for stiffening and a boundary of the strobel board are spaced apart. Spacing apart the boundary of the means for stiffening and the boundary of the strobel board may comprise that the boundary of the means for stiffening and the boundary of the strobel board are separated by a distance. In particular, the boundary of the means for stiffening and the boundary of the strobel board may be spaced apart such that the distance between the boundary of the means for stiffening and the boundary of the strobel board is essentially uniform along the boundary of the means for stiffening and / or the boundary of the strobel board.

[0059] For example, the distance between the boundary of the means for stiffening and the boundary of the strobel board may be at least 5 mm, preferably at least 10 mm, more preferably at least 15 mm, more preferably at least 20 mm, most preferably at least 25 mm. In addition, or alternatively, the distance between the boundary of the means for stiffening and the boundary of the strobel board may at most 10 cm, preferably at most 8 cm, more preferably at most 6 cm, even more preferably at most 4 cm, most preferably at most 2 cm. In some embodiments, the distance between the boundary of the means for stiffening and the boundary of the strobel board may at most 1.5 cm, preferably at most 1 cm, more preferably at most 0.8 cm, even more preferably at most 0.6 cm, most preferably at most 0.4 cm.

[0060] In general, the shape and / or the size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a portion of the strobel board. For example, the shape and / or size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a forefoot portion of the strobel board. In addition, or alternatively, the shape and / or size of the means for stiffening may be adapted such as to essentially correspond to a rescaling of a shape and / or size of a midfoot portion of the strobel board. For example, the shape and / or the size of the means for stiffening may be rescaled such as to space apart the boundary of the means for stiffening and the boundary of the strobel board. For example, the shape and / or the size of the means for stiffening may comprise a rescaling of a shape and / or a size of a portion of the strobel board by a factor of at least 0.8, preferably at least 0.85, more preferably at least 0.9, even more preferably at least 0.92, most preferably at least 0.95.

[0061] In some embodiments, the means for stiffening may be at least partially attached to the insole of the shoe. In particular, the means for stiffening may be attached to a side of the insole adapted to face the strobel of the shoe. In addition, or alternatively, the means for stiffening may be attached to a side of the insole adapted to face a midsole of the shoe.

[0062] For example, the side of the insole adapted to face a midsole of the shoe may comprise a side of the insole opposite to the side of the insole adapted to face the strobel of the shoe. Specifically, the means for stiffening may be injected into the insole of the shoe. In addition, the means for stiffening may be cemented and / or glued to the insole of the shoe. For example, the insole of the shoe may comprise a sockliner. In particular, the means for stiffening may be injected and / or cemented and / or glued to the sockliner such that the means for stiffening are arranged at a side of the sockliner adapted to face a midsole of the shoe.

[0063] Specifically, the means for stiffening may be attached to and / or injected into a portion of the insole, e.g., a midfoot portion of the insole and / or a forefoot portion of the insole. Generally, an area may be associated with the means for stiffening. For example, the area associated with the means or stiffening may comprise an area of the portion of the insole to which the means for stiffening has / have been attached and / or an area of the portion of the insole into which the means for stiffening has / have been injected. Specifically, the area associated with the means for stiffening may be at least 40%, preferably at least 50% more preferably at least 60%, even more preferably at least 70%, most preferably at least 80% of a corresponding area of the insole. For example, the corresponding area of the insole, e.g., the area of the insole corresponding to the area of the means for stiffening, may comprise an area of a portion of the insole that surrounds and / or encompasses the means for stiffening. In particular, the portion of the insole that surrounds and / or encompasses the means for stiffening may surround and / or encompass the means for stiffening from a beginning of the means for stiffening to an end of the means for stiffening. In some embodiments, the beginning of the means for stiffening may be located in a forefoot portion of the insole. In addition, the end point of the means for stiffening may be located in a mid-foot region and / or heel region of the insole.

[0064] For example, a shoe, e.g., a sports shoe, may be associated with at least two insoles. For example, a first insole may be associated with a first stiffness and a second insole may be associated with a second stiffness. Specifically, the insole and / or the shoe may be adapted such that the insoles can be interchanged. For example, the shoe may initially comprise the first insole, e.g., the first insole may be arranged within a cavity of the shoe. Then, the first insole may be taken out of the shoe, e.g., taken out through an ankle opening of the shoe. After the first insole has been taken out of the shoe, the second insole may be inserted into the cavity of the shoe, e.g., inserted through the ankle opening of the shoe. Generally, a first means for stiffening may be attached to and / or injected into the first insole. The first means for stiffening may be attached to and / or injected into a side of the first insole adapted to face a midsole of the shoe. For example, the first means for stiffening may be adapted such as to increase a stiffness and / or propulsion of the shoe, e.g., of the shoe comprising the first insole. In addition, the second insole may not comprise means for stiffening the insole, e.g., no additional material for stiffening the insole may be attached to and / or injected into the second insole. In other words, the stiffness associated with the second insole corresponds to a stiffness of a typical, e.g., unstiffened, insole.

[0065] Associating the shoe, e.g., the sports shoe, with at least two (interchangeable) insoles, e.g., insoles with a different stiffness, allows adapting the stiffness of the shoe to the particular and individual needs of the athlete. For example, in a first situation where a flexible (low stiffness) and cushioned shoe is preferred, the athlete can select an insole from the at least two insoles that is associated with a low stiffness and / or without an additional stiffening means.

[0066] A second aspect of the present invention relates to a shoe, preferably a sports shoe. The shoe comprises the sole element according to one of the above-described embodiments.Short description of the figures

[0067] In the following, exemplary embodiments of the invention are described with reference to the figures. The figures show: Fig. 1A :strobel board comprising a stiffening plate arranged inside a closed pocket, wherein the pocket is closed via a hook-and-loop fastener; Fig. 1B :strobel board comprising a stiffening plate, wherein a part of the stiffening plate is arranged outside of the opened pocket; Fig. 2 :strobel board comprising a stiffening plate, wherein the stiffening plate is attached to the strobel board via stitching; Fig. 3 :strobel board comprising a stiffening plate, wherein the stiffening plate is attached to the strobel board via gluing; Fig. 4A :strobel board, wherein at least a portion of the means for stiffening is / are injected into a forefoot portion of the strobel board; Fig. 4B :strobel board, wherein at least a portion of the means for stiffening is / are injected such into the strobel board that the means for stiffening extend from the forefoot portion to a midfoot portion of the strobel board; Fig. 4C: strobel board, wherein at least a portion of the means for stiffening is / are injected such into the strobel board that a centre portion of the means for stiffening is located at a midfoot portion of the strobel board; Fig. 5A: schematic illustration of a strobel board comprising a stiffening plate arranged inside a pocket of the strobel board; Fig. 5B: schematic illustration of the strobel board illustrating the insertion of the stiffening plate into the pocket of the strobel board; Fig. 5C: schematic illustration of an exemplary embodiment of a stiffening plate adapted to be received in the pocket of the strobel board. Detailed description of preferred embodiments

[0068] In the following, only some possible embodiments of the invention are described in detail. It is to be understood that these exemplary embodiments can be modified in a number of ways and combined with each other whenever compatible and that certain features may be omitted in so far as they appear dispensable.

[0069] Fig. 1A and 1B illustrate an exemplary embodiment of sole element 100 adapted to be arranged in a shoe. The sole element 100 comprises a stiffening plate 110, a strobel board 120 and a pocket 130. The strobel board 110 comprises a non-woven material. The pocket 130 is arranged in a region 105a of the sole element 100 adapted to receive a forefoot. In some embodiments, the pocket 130 may be arranged in the region 105a of the sole element 100 such as to extend at least partially into a region 105b of the sole element 100 adapted to receive a midfoot. In addition, the pocket 130 may be arranged in the region 105a of the sole element 100 such as to extend at least partially into the region 105b and a region 105c of the sole element 100 adapted to receive a rearfoot. The pocket 130 is attached to the strobel board 120 on a side of the strobel board 120 adapted to face an inside of a shoe. In particular, a portion of a boundary and / or an outer region of the pocket 130 is attached to the strobel board 120.

[0070] The size and the shape of the boundary and / or outer region of the pocket 130 essentially follows the size and the shape of the strobel board 130 in the forefoot region 105 of the sole element. The pocket 130 comprises an opening 132. A width of the opening 132 essentially corresponds to a width associated with the strobel board 120 in a region associated with the opening 132.

[0071] As illustrated in Fig. 1B, the pocket 130 is adapted to receive the stiffening plate 110. In particular, the size and the shape of the pocket 130 is such that the cavity formed by the pocket 130 can receive the stiffening element 110. For example, the size and the shape of the pocket 130 essentially corresponds to the size and the shape of the stiffening plate 110. Specifically, the stiffening plate 110 comprises two recesses 115a, 115b, e.g., a first recess 115a in a rear portion of the stiffening plate 110 and a second recess 115b in a front portion of the stiffening plate. In particular, the pocket 130 is adapted such that the cavity formed by the pocket essentially mirrors the recess 115b of the stiffening plate 110. For example, a portion of the pocket 130 corresponding to the recess 115b is attached to the strobel board 120. In particular, the portion of the pocket 130 corresponding to the recess 115b is attached to the strobel board 115b such as to exclude the portion from the cavity formed by the pocket 130.

[0072] The pocket 130 further comprises a hook-and-loop fastener 134. Fig. 1A illustrates the hook-and-loop fastener 134 in a closed configuration and Fig.1B illustrates the hook-and-loop fastener 134 in an open configuration. The hook-and-loop fastener 134 is adapted to open and / or to close at least a portion of the pocket 130. In particular, the hook-and-loop fastener is adapted to close the at least a portion of the pocket 130 such as to prevent a (unintended) removing of the stiffening plate 110 from the pocket. In addition, the hook-and-loop fastener 134 is adapted to open the at least a portion of the pocket 130 such as to enable a (intended) removing and / or exchanging of the stiffening plate 110. Specifically, the first recess 115a in the rear region of the stiffening plate 110 and the hook-and-loop fastener 134 are configured such that the hook-and-loop fastener 134 can be closed through the recess 115b. In particular, the first recess 115a in the rear region of the stiffening plate 110 and the hook-and-loop fastener 134 are configured such that the hook side (loop side) of the hook-and-loop fastener 134 contacts the opposing loop side (hook side) of the hook-and-loop fastener 134 through the recess 115b.

[0073] Fig. 2 illustrates an exemplary embodiment of a sole element 200, wherein the sole element 200 comprises a stiffening plate 210 and a strobel board 220. The strobel board 220 comprises a non-woven material. The stiffening plate 210 is arranged at a portion 205a of the sole element 200 adapted to receive a forefoot. In some embodiments, the stiffening plate 210 may be arranged in the region 205a of the sole element 200 such as to extend at least partially into a region 205b of the sole element 200 adapted to receive a midfoot. In addition, the stiffening element 210 may be arranged in the region 205a of the sole element 200 such as to extend at least partially into the region 205b and a region 205c of the sole element 200 adapted to receive a rearfoot.

[0074] The stiffening element 210 comprises two recesses 215a, 215b, e.g., a first recess 215a in a rear portion of the stiffening plate 210 and a second recess 215b in a front portion of the stiffening plate 210. The stiffening plate 210 is attached to the strobel board 220. In particular, the stiffening plate 210 is attached to the strobel board 220 by a stitching 230. Specifically, the stiffening plate 210 is attached to the strobel board 220 by the stitching 230 essentially along the complete boundary and / or outer region of the stiffening plate 210. In some embodiments, the stiffening plate 210 may be attached to the strobel board 220 by a stitching 230 along a portion of the boundary and / or outer region of the stiffening plate. For example, the stiffening plate 210 may be attached to the strobel board 220 by a stitching 230 only along a lateral boundary and / or a medial boundary of the stiffening plate 210, e.g., the stiffening plate 210 may not be stitched to the strobel board 220 along a portion of the boundary and / or outer region of the stiffening plate 210 associated with the recess 215a and / or the recess 215b.

[0075] Fig. 3 illustrates an exemplary embodiment of a sole element 300, wherein the sole element 300 comprises a stiffening plate 310 and a strobel board 320. The strobel board 320 comprises a non-woven material. The stiffening plate 310 is arranged at a portion 305a of the sole element 300 adapted to receive a forefoot. In some embodiments, the stiffening plate 310 may be arranged in the region 305a of the sole element 300 such as to extend at least partially into a region 305b of the sole element 300 adapted to receive a midfoot. In addition, the stiffening element 310 may be arranged in the region 305a of the sole element 300 such as to extend at least partially into the region 305b and a region 305c of the sole element 300 adapted to receive a rearfoot. The stiffening element 310 comprises two recesses 315a, 315b, e.g., a first recess 315a in a rear portion of the stiffening plate 310 and a second recess 315b in a front portion of the stiffening plate 310. The stiffening plate 310 is attached to the strobel board 320. In particular, the stiffening plate 310 is attached to the strobel board 320 by gluing the stiffening plate 310 to the strobel board 320.

[0076] Fig. 4A illustrates an exemplary embodiment of a sole element 400, wherein the sole element 400 comprises means for stiffening 410 at least a portion of the sole element 400. The means for stiffening 410 at least a portion of the sole element are located in a region 405a adapted to receive a forefoot. The sole element 400 further comprises a strobel board 420. The strobel board 420 may comprise a non-woven material. In some embodiments the strobel board may comprise a knitted and / or woven material. The means for stiffening 410 is / are injected into the strobel board 420. For example, the means for stiffening 410 may be injected such into the strobel board 420 as to infiltrate at least a portion of the strobel board 420, e.g., the strobel board material. In particular, the means for stiffening 410 may comprise polyamide and / or a thermoplastic elastomer, e.g., polyether block amide.

[0077] A shape of the means for stiffening 410 essentially follows a shape of the strobel board 420. In particular, the shape of the means for stiffening 410 in the region 405a essentially follows the shape of the strobel board 420 in the region 405a. Specifically, at least a portion of a boundary and / or outer region of the means for stiffening 410 follows the boundary and / or outer region of the strobel board 420. Generally, the means for stiffening 410 may be adapted and / or arranged such that the boundary of the means for stiffening 410 is at distance to the boundary of the strobel board 420. For example, the distance between the boundary of the means for stiffening 410 and the strobel board 420 may be comprise a distance δ. Adapting and / or arranging the means for stiffening 410 such that the boundary of the means for stiffening 410 is at distance to the boundary of the strobel board 420 may comprise that a distance between the boundary of the means for stiffening 410 and the strobel board 420 is essentially uniform along the boundary of the means for stiffening 420 and / or along the boundary of the strobel board 410. For example, the uniform distance may comprise the distance δ. In some embodiments, the means for stiffening 410 may be adapted such as to essentially correspond to a rescaling of a portion of the strobel board 420. For example, the means for stiffening 410 may be adapted such as to correspond to a rescaling of a portion of the strobel board 420 in a forefoot region 405a. In particular, the means for stiffening 410 may be rescaled such that the boundary of the means for stiffening 410 is at a distance δ to the boundary of the strobel board 420. The rescaling of the (complete) strobel board 420 is indicated by the dotted line 402. In particular, a distance between the rescaled strobel board 402 (dotted line) and the boundary of the (not rescaled) strobel board 420 is δ.

[0078] Figure 4B illustrates a further exemplary embodiment of the sole element. The sole element 100 comprises the strobel board 420 and means for stiffening 410 at least a portion of the strobel board 420. In particular, the means for stiffening 410 is / are attached to and / or injected into a forefoot portion 405a of the strobel board 420 and attached to and / or injected into a midfoot portion 405b of the strobel board 420. In addition, the means for stiffening is / are attached to and / or injected into a rearfoot / heel portion 405c of the strobel board 420. In particular, the means for stiffening 410 is / are attached to and / or injected into the strobel board 420 such as to extend from the forefoot portion 405a of the strobel board 420 to the rearfoot / heel portion 405c of the strobel board 420.

[0079] Figure 4C illustrates a further exemplary embodiment of the sole element. The sole element 100 comprises the strobel board 420 and means for stiffening 410 at least a portion of the strobel board 420. The means for stiffening 410 is / are attached to and / or injected into the strobel board 420 such that a centre portion 414 of the means for stiffening 410 is located in a midfoot portion 405b of the strobel board 420. Specifically, the means for stiffening 410 extend(s) towards the forefoot portion 405a of the strobel board 420. In addition, the means for stiffening 410 extend(s) towards the rearfoot / heel portion 405c of the strobel board 420. In particular, two fingers 418a, 418b extend from the centre portion 414 of the means for stiffening 410 towards the forefoot portion 405a of the strobel board. Similarly, two fingers 418c, 418d extend from the centre portion 414 of the means for stiffening 410 towards the rearfoot / heel portion 405c of the strobel board 410. Generally, the fingers 418a, 418b, 418c, 418d extend from the centre portion 414 such as to follow a (imaginary) boundary 402. For example, the (imaginary) boundary may comprise a rescaled boundary of the strobel board 410.

[0080] Figure 5A illustrates an exemplary embodiment of the sole element. The sole element comprises a strobel board 520 and a pocket 530 is arranged at the strobel board 520. For example, the pocket 530 may be comprised within the strobel board 520, e.g., the strobel board 520 and the pocket 530 may be one piece. In addition, or alternatively, the pocket 530 may be attached to the strobel board 520, e.g., the pocket 520 may be stitched and / or glued to the strobel board 520. The pocket is arranged on a side of the strobel board 520 adapted to face an insole and / or a foot. The pocket 530 is adapted to receive a stiffening element 510. In the situation illustrated in Fig. 5A, the stiffening element 510 is arranged within the pocket 530, e.g., the stiffening element 510 has been inserted into the pocket 530. In particular, the pocket 530 is arranged in a forefoot portion 505a of the strobel board 520, e.g., a portion of the strobel board 520 adapted to receive a forefoot. The size and / or the shape of the pocket 530 is based on the size and / or shape of the stiffening element 510. Specifically, the pocket 530 comprises a finger 534, extending and / or emerging from a base portion of the pocket 530. For example, the finger 534 of the pocket 530 may extend and / or emerge from the base portion of the pocket such as to extend towards a toe region of the strobel board 520. In particular, the size and / or the shape of the finger 534 is adapted such that the finger 534 can receive the finger 512 of the stiffening element 510 (see Fig. 5B or 5C).

[0081] Figure 5B illustrates a situation where the stiffening element 510 is not (yet) arranged in the pocket 530 of the strobel board 520. Specifically, the stiffening element 510 can be inserted into the pocket 530 of the strobel board 520 through the opening 532 of the pocket 530. For example, the stiffening element 510 can be inserted into the pocket 530 through the opening 532 by moving the stiffening element 510 into the direction m, e.g., by moving the stiffening element 510 towards (and through) the opening 532 of the pocket 530. In particular, the stiffening element can be moved and / or shifted such that the finger 512 of the stiffening element 510 is received by the finger 534 of the pocket 530.

[0082] Figure 5C illustrates the exemplary stiffening element 510. The stiffening element 510 comprises a finger 512 extending and / or emerging from a base portion of the stiffening element 510. The base portion of the stiffening element 510 comprises a plurality of apertures 514a, 514b, 514c, 514d and a plurality of ribs 516a, 516b, 516c. In particular, the apertures 514a, 514b, 514c, 514d are separated by the ribs 516a, 516b, 516c. For example, the aperture 514b is separated from the aperture 514c by the rib 516b. The apertures 514a, 514b, 514c, 514d comprise an elliptical shape. Specifically, a semi-major axis of the elliptical shape of the apertures514a, 514b, 514c, 514d is essentially parallel to an elongation direction of the strobel board 520. In some embodiments, the apertures 514a, 514b, 514c, 514d of the stiffening element 510 may comprise different shapes and / or sizes. For example, the aperture 514a may comprise a first shape and / or size and the aperture 514b may comprise a second shape and / or size.Further Embodiments:

[0083] Embodiment 1: A sole element (100) adapted to be arranged in a shoe, preferably a sports shoe, wherein: the sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot, the sole element (100) is adapted to be arranged in the shoe when wearing the shoe, and the sole element (100) is a strobel board (120) and / or an insole.

[0084] Embodiment 2: The sole element (100) according to Embodiment 1, wherein the means for stiffening (110) at least a portion of the sole element is / are adapted to: stiffen at least a portion (105a) of the shoe adapted to receive a forefoot; and / or stiffen at least a portion (105b) of the shoe adapted to receive a midfoot; preferably wherein the means for stiffening is / are arranged such as to extend from the portion (105a) of the shoe adapted to receive a forefoot towards the portion (105b) of the shoe adapted to receive a midfoot.

[0085] Embodiment 3: The sole element (100) according to Embodiment 2, wherein to stiffen at least a portion of the shoe adapted to receive a forefoot and / or a midfoot comprises to increase the propulsion and / or to reduce a stud pressure associated with the shoe.

[0086] Embodiment 4: The sole element (100) according to one of the Embodiments 1 to 3, wherein the sole element (100) is arranged in the shoe such that at least a portion (110) of the sole element (100) is exchangeable, preferably wherein at least a portion of the means for stiffening (110) is exchangeable.

[0087] Embodiment 5: The sole element (100) according to Embodiment 4, wherein the at least a portion (110) of the sole element which is exchangeable is adapted to be exchanged and / or removed through an opening of the shoe, preferably an ankle opening of the shoe.

[0088] Embodiment 6: The sole element (100) according to one of the Embodiments 1 to 5, wherein the means for stiffening (110) comprise(s) a pocket (130) adapted to receive a stiffening element (110), preferably wherein the pocket (130) is adapted to receive the stiffening element (110) through an opening (132).

[0089] Embodiment 7: The sole element (100) according to Embodiment 6, wherein: the pocket (130) is comprised within the strobel board (120), and / or the pocket (130) is at least partially attached to the strobel board (120), prefer- ably wherein the pocket (130) is attached to the strobel board (130) via stitching and / or knitting.

[0090] Embodiment 8: The sole element (100) according to Embodiment 6 or 7, wherein the pocket (130) is arranged on a side of the strobel board (120) adapted to face an inside of the shoe.

[0091] Embodiment 9: The sole element (100) according to one of the Embodiments 6 to 8, wherein the pocket (130) comprises means for fixing (134) the stiffening element (110), preferably wherein the means for fixing (134) comprises a hook-and-loop fastener.

[0092] Embodiment 10: The sole element (100) according to one of the Embodiments 1 to 9, wherein the means for stiffening (110) comprises a stiffening plate.

[0093] Embodiment 11: The sole element (100) according to Embodiments 1 to 10, wherein the means for stiffening (110) comprise(s) a stiffening element (110) which is at least partially attached to the strobel board. Embodiment

[0094] Embodiment 12: The sole element (200, 300) according to Embodiment 11 wherein the stiffening element (210, 310) is attached to the strobel board by gluing and / or stitching (230).

[0095] Embodiment 13: The sole element (400) according to one of the Embodiments 1 to 12, wherein at least a portion of the means for stiffening (410) is injected into the strobel board (420).

[0096] Embodiment 14: The sole element (100) according to one of the Embodiments 1 to 13, wherein the strobel board (120) comprises a non-woven material.

[0097] Embodiment 15: The sole element according to one of the Embodiments 1 to 14, wherein the means for stiffening is / are at least partially attached to the insole of the shoe, preferably wherein the means for stiffening is / are attached to a side of the insole adapted to face the strobel of the shoe and / or a midsole of the shoe.

[0098] Embodiment 16: A shoe, preferably a sports shoe, comprising the sole element (100) according to one of the Embodiments 1 to 15.

Examples

embodiment 1

[0083] A sole element (100) adapted to be arranged in a shoe, preferably a sports shoe, wherein:

the sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot, the sole element (100) is adapted to be arranged in the shoe when wearing the shoe, and the sole element (100) is a strobel board (120) and / or an insole.

[0084]Embodiment 2: The sole element (100) according to Embodiment 1, wherein the means for stiffening (110) at least a portion of the sole element is / are adapted to:

stiffen at least a portion (105a) of the shoe adapted to receive a forefoot; and / or stiffen at least a portion (105b) of the shoe adapted to receive a midfoot; preferably wherein the means for stiffening is / are arranged such as to extend from the portion (105a) of the shoe adapted to receive a forefoot towards the portion (105b) of the shoe ada...

embodiment 16

[0098] A shoe, preferably a sports shoe, comprising the sole element (100) according to one of the Embodiments 1 to 15.

Claims

1. A sole element (100) adapted to be arranged in a shoe, preferably a sports shoe, wherein: the sole element (100) comprises means for stiffening (110) at least a portion (105a) of the sole element (100), the at least a portion (105a) of the sole element (100) is located at least in a region adapted to receive a forefoot, the sole element (100) is adapted to be arranged in the shoe when wearing the shoe, and the sole element (100) is a strobel board (120) and / or an insole.

2. The sole element (100) according to claim 1, wherein the means for stiffening (110) at least a portion of the sole element is / are adapted to: stiffen at least a portion (105a) of the shoe adapted to receive a forefoot; and / or stiffen at least a portion (105b) of the shoe adapted to receive a midfoot; preferably wherein the means for stiffening is / are arranged such as to extend from the portion (105a) of the shoe adapted to receive a forefoot towards the portion (105b) of the shoe adapted to receive a midfoot.

3. The sole element (100) according to claim 2, wherein to stiffen at least a portion of the shoe adapted to receive a forefoot and / or a midfoot comprises to increase the propulsion and / or to reduce a stud pressure associated with the shoe.

4. The sole element (100) according to one of the claims 1 to 3, wherein the sole element (100) is arranged in the shoe such that at least a portion (110) of the sole element (100) is exchangeable, preferably wherein at least a portion of the means for stiffening (110) is exchangeable.

5. The sole element (100) according to claim 4, wherein the at least a portion (110) of the sole element which is exchangeable is adapted to be exchanged and / or removed through an opening of the shoe, preferably an ankle opening of the shoe.

6. The sole element (100) according to one of the claims 1 to 5, wherein the means for stiffening (110) comprise(s) a pocket (130) adapted to receive a stiffening element (110), preferably wherein the pocket (130) is adapted to receive the stiffening element (110) through an opening (132).

7. The sole element (100) according to claim 6, wherein: the pocket (130) is comprised within the strobel board (120), and / or the pocket (130) is at least partially attached to the strobel board (120), preferably wherein the pocket (130) is attached to the strobel board (130) via stitching and / or knitting.

8. The sole element (100) according to claim 6 or 7, wherein the pocket (130) is arranged on a side of the strobel board (120) adapted to face an inside of the shoe.

9. The sole element (100) according to one of the claims 6 to 8, wherein the pocket (130) comprises means for fixing (134) the stiffening element (110), preferably wherein the means for fixing (134) comprises a hook-and-loop fastener.

10. The sole element (100) according to one of the claims 1 to 9, wherein the means for stiffening (110) comprises a stiffening plate.

11. The sole element (100) according to claim 1 to 10, wherein the means for stiffening (110) comprise(s) a stiffening element (110) which is at least partially attached to the strobel board.

12. The sole element (200, 300) according to claim 11 wherein the stiffening element (210, 310) is attached to the strobel board by gluing and / or stitching (230).

13. The sole element (400) according to one of the claims 1 to 12, wherein: at least a portion of the means for stiffening (410) is injected into the strobel board (420); and / or the strobel board (120) comprises a non-woven material.

14. The sole element according to one of the claims 1 to 13, wherein the means for stiffening is / are at least partially attached to the insole of the shoe, preferably wherein the means for stiffening is / are attached to a side of the insole adapted to face the strobel of the shoe and / or a midsole of the shoe.

15. A shoe, preferably a sports shoe, comprising the sole element (100) according to one of the claims 1 to 14.

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