Dual durometer structure for an athletic shoe

Abstract

The utility model provides a kind of double hardness structure of sports shoes, it includes sole and vamp;Vamp includes forefoot and heel part;The heel part is set corresponding to the heel of foot, for the heel part of cladding foot;Heel part includes the sheet body woven by carbon fiber, the lower edge of sheet body is connected with the sole;Sheet body includes its central region part, and the ring part around central region part is set;The rigidity of central region part is greater than the rigidity of ring part.This application central region part rigidity of heel part is relatively big, not easy to deform after being stressed, provides strong support effect for foot in the process of movement, effectively avoids achilles tendon tissue to be injured in movement.And the periphery of central region part is the ring part of rigidity lower, more flexible, ring part is wrapped in calcaneus of heel in the bottom area between central region part and sole, provides better buffering, shock-absorbing effect for heel in movement, thereby effectively protects calcaneus part.

Description

Technical Field

[0001] This utility model relates to the field of sports shoe production and design technology, and in particular to a dual-hardness structure for sports shoes. Background Technology

[0002] Currently, the core of athletic shoe construction has evolved from early single-function, simple structures to a technological system that incorporates functional layering, material composites, and biomechanical adaptation. Its development has consistently focused on addressing the pain points of traditional structures, such as insufficient cushioning, weak support, poor fit, and low durability. This requires a combination of advancements in materials science (e.g., the application of new materials like TPU and carbon fiber), biomechanics (e.g., gait analysis to optimize structural adaptation), and manufacturing processes (e.g., integrated knitting and 3D printing) that continuously iterate. Furthermore, through functional layering design (e.g., a three-layer structure of durable outsole, cushioning midsole, and a snug insole), material composite applications (e.g., the thermal fusion of mesh and TPU in the upper), and biomechanical adaptation (e.g., ergonomic design with arch support and heel support), athletic shoes are gradually transitioning from "basic wear" to "enhanced athletic performance and reduced injury risk," forming the current multi-dimensional and collaborative technological system.

[0003] In current sports shoes, sufficient support, stability, and shock absorption are required in the heel during exercise. Carbon fiber is a lightweight material, and traditional carbon fiber materials provide excellent support and stability due to their high rigidity. However, excessive rigidity can seriously affect the shock absorption performance and comfort of the heel during exercise, and can easily cause Achilles tendon injuries to athletes. Utility Model Content

[0004] The purpose of this invention is to provide a dual-hardness structure for athletic shoes to solve at least one of the aforementioned technical problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a dual-hardness structure for sports shoes, comprising: a sole and an upper; The upper includes a forefoot portion and a heel portion; the heel portion is provided corresponding to the heel of the foot and is used to cover the heel area of ​​the foot; The heel portion includes a sheet woven from carbon fiber, the lower edge of which is connected to the sole. The sheet body includes a central region and a ring portion surrounding the central region; the stiffness of the central region is greater than that of the ring portion.

[0006] Furthermore, the central region is positioned to correspond to the Achilles tendon tissue of the foot, wrapping around the Achilles tendon tissue of the foot from the left, right and back sides.

[0007] Furthermore, the ring portion includes a bottom between the central region and the sole, the bottom being positioned corresponding to the calcaneus of the foot and wrapping around the calcaneus from the left, right and rear sides.

[0008] The central area of ​​the heel section of this application has high rigidity and is not easily deformed under stress, providing strong support for the foot during exercise. The central area wraps around the Achilles tendon tissue from the left, right, and rear sides, effectively preventing injury to the Achilles tendon during exercise. The surrounding area of ​​the central area is a less rigid and more flexible ring section. In particular, the ring section wraps around the calcaneus (heel bone) in the bottom area between the central area and the sole, providing good cushioning and shock absorption during exercise, thus effectively protecting the calcaneus.

[0009] Furthermore, the central region and the ring section are two independently woven carbon fiber components, which are connected together by bonding or sewing.

[0010] Preferably, the central region and the annular region are sheets integrally woven from carbon fiber.

[0011] Furthermore, the carbon fiber weaving density in the central region is greater than that in the ring region.

[0012] Preferably, the stiffness of the central region is 0.5-3 times the stiffness of the annular region.

[0013] Furthermore, the carbon fiber weaving density of the central region is 1-5 times that of the carbon fiber weaving density of the ring region.

[0014] Furthermore, the sheet and the central region, when unfolded, form an overall triangular or arc-shaped structure.

[0015] Preferably, the distance between the periphery of the central region and the periphery of the sheet is 0.5-3cm.

[0016] Furthermore, the height of the sheet is 4-6 cm; And / or, the distance between the central area and the upper edge of the sole is 0.5-1.5cm.

[0017] Furthermore, the heel portion also includes a rear extension integrally formed with the forefoot portion, the rear extension being positioned above the plate in height, and the lower edge of the rear extension being connected to the upper edge of the plate.

[0018] Furthermore, the stiffness of the rear extension is less than that of the ring portion, and the rear extension is positioned corresponding to the ankle, wrapping around the ankle from the left, right and rear sides.

[0019] The rear extension uses the same material as the forefoot, such as cloth, leather, or TPU. This material is softer than the ring part, providing coverage and protection for the ankle without affecting its flexibility.

[0020] Furthermore, the sole is provided with a cushioning groove, and the cushioning groove has two through holes on one side of the bottom surface of the sole.

[0021] Furthermore, the cushioning grooves are evenly distributed in the forefoot area and / or heel area of ​​the sole.

[0022] Furthermore, the buffer groove is in the shape of a sphere, hemisphere, or cube.

[0023] Furthermore, the buffer groove is filled with a filler material to change the support or cushioning force of the shoe sole.

[0024] The filler is selected from foamed thermoplastic polyurethane, ethylene-vinyl acetate copolymer, polyurethane, thermoplastic rubber or resin, etc.

[0025] This application allows for adjustments to the stiffness and cushioning force of different shoe soles without altering the overall structural design by changing the material, quantity, and amount of filling material within the cushioning groove. This enables the production of shoe soles with multiple stiffness or cushioning levels within the same batch of products, providing production flexibility without increasing production costs and meeting the needs of different customers.

[0026] By adopting the above technical solution, this utility model has the following beneficial effects: This invention provides a dual-hardness structure for sports shoes. The central area of ​​the heel has high rigidity and is not easily deformed under stress, providing strong support for the foot during exercise. The central area wraps around the Achilles tendon tissue from the left, right, and rear sides, effectively preventing injury to the Achilles tendon during exercise. The perimeter of the central area is a less rigid and more flexible ring. In particular, the ring wraps around the calcaneus (heel bone) in the bottom area between the central area and the sole, providing better cushioning and shock absorption during exercise, thus effectively protecting the calcaneus. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1A perspective view of a sports shoe provided for an embodiment of this utility model; Figure 2 for Figure 1 A partial view of the heel section shown; Figure 3 for Figure 1 The diagram shows the structure of the sheet. Figure 4 for Figure 1 The diagram shows the unfolded shape of the sheet. Figure 5 for Figure 1 A schematic diagram showing the unfolded form of the second embodiment of the sheet body; Figure 6 This is a schematic diagram of the shoe sole structure provided in Embodiment 2 of this utility model; Figure 7 This is a cross-sectional view of the sole provided in Embodiment 2 of this utility model.

[0029] Figure label: 10-Sole; 11-Cushioning groove; 12-Through hole; 13-Padding; 20-Upper; 21-Forefoot; 25-Heel; 26-Heel extension; 30-Plate; 31-Ring; 31a-Sole; 35-Central Region Department. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The present invention will be further explained below with reference to specific embodiments.

[0034] Example 1 See Figure 1 and Figure 2 As shown, this embodiment discloses a dual-hardness structure for a sports shoe, including: a sole 10 and an upper 20; The upper 20 includes a forefoot portion 21 and a heel portion 25; the heel portion 25 is provided corresponding to the heel of the foot and is used to cover the heel portion 25 of the foot; The heel portion 25 includes a sheet 30 woven from carbon fiber, the lower edge of which is connected to the sole 10. See Figure 3 As shown, the sheet body 30 includes a central region 35 and an annular portion 31 surrounding the central region 35; the stiffness of the central region 35 is greater than the stiffness of the annular portion 31.

[0035] Furthermore, the central region 35 is provided corresponding to the Achilles tendon tissue of the foot, wrapping around the Achilles tendon tissue of the foot from the left, right and back sides.

[0036] Furthermore, the ring portion 31 includes a bottom 31a between the central region portion 35 and the sole 10, the bottom 31a being positioned corresponding to the calcaneus of the foot and wrapping around the calcaneus from the left, right and rear sides.

[0037] The central region 35 of the heel portion 25 of this application has high rigidity and is not easily deformed under stress, providing strong support for the foot during exercise. The central region 35 wraps around the Achilles tendon tissue from the left, right, and rear sides, effectively preventing injury to the Achilles tendon tissue during exercise. The central region 35 is surrounded by a less rigid and more flexible ring portion 31. In particular, the bottom 31a area of ​​the ring portion 31 between the central region 35 and the sole 10 wraps around the calcaneus of the heel, providing better cushioning and shock absorption for the heel and foot during exercise, thereby effectively protecting the calcaneus area.

[0038] Furthermore, the carbon fiber weaving density of the central region 35 is 1-5 times that of the carbon fiber weaving density of the ring portion 31. This results in the stiffness of the central region 35 being 0.5-3 times that of the ring portion 31.

[0039] Furthermore, the sheet 30 and the central region 35, when unfolded, form an overall triangular or arc-shaped structure.

[0040] The height of the plate 30 is 4-6 cm; preferably, the distance between the periphery of the central region 35 and the periphery of the plate 30 is 0.5-3 cm. The distance between the central region 35 and the upper edge of the sole 10 is 0.5-1.5 cm.

[0041] Further, see Figure 4 As shown, the central region 35 and the ring 31 are two independently woven carbon fiber components. The carbon fiber density of the central region 35 is 3-5 times that of the ring 31, and they are then connected together by adhesive or sewing.

[0042] More preferably, see Figure 5 As shown, the central region 35 and the annular region 31 are integrally woven from carbon fiber to form the sheet 30. The carbon fiber weaving density of the central region 35 is greater than that of the annular region 31. The carbon fiber density of the central region 35 is 1-3 times that of the annular region 31. That is, when manufacturing the sheet 30, the stiffness and flexibility of the two regions are changed by adjusting the weaving density of the carbon fibers in the two regions. The higher the weaving density, the greater the corresponding stiffness, and the lower the weaving density, the greater the flexibility.

[0043] Of course, in order to achieve different stiffness between the central region 35 and the ring 31, it can also be achieved by impregnating the two regions with resins or rubbers of different components or materials. However, this method is not within the scope of this application.

[0044] See Figure 1 As shown, the heel portion 25 also includes a rear extension portion 26 integrally formed with the forefoot portion 21. The rear extension portion 26 is positioned above the plate body 30 in height, and its lower edge connects to the upper edge of the plate body 30. The stiffness of the rear extension portion 26 is less than that of the ring portion 31. The rear extension portion 26 is positioned corresponding to the ankle, and it wraps around the ankle from the left, right, and rear sides.

[0045] The rear extension 26 and the forefoot 21 are made of the same material, such as cloth, leather or TPU. The material is softer than that of the ring 31, which covers and protects the ankle without affecting the flexibility of the ankle.

[0046] This invention provides a dual-hardness structure for sports shoes. The central area 35 of the heel portion 25 has high rigidity and is not easily deformed under stress, providing strong support for the foot during exercise. The central area 35 wraps around the Achilles tendon tissue from the left, right, and rear sides, effectively preventing injury to the Achilles tendon tissue during exercise. The central area 35 is surrounded by a less rigid and more flexible ring portion 31. In particular, the bottom 31a area of ​​the ring portion 31 between the central area 35 and the sole 10 wraps around the calcaneus, providing better cushioning and shock absorption during exercise, thus effectively protecting the calcaneus.

[0047] Example 2 This embodiment is basically the same as Embodiment 1, except that: See Figure 6 and Figure 7 As shown, in this embodiment, a buffer groove 11 is provided inside the sole 10, and the buffer groove 11 has two through holes 12 on one side of the bottom surface of the sole 10.

[0048] Furthermore, the cushioning grooves 11 are evenly distributed in the forefoot area and / or heel area of ​​the sole 10. The cushioning grooves 11 are spherical, hemispherical, or cubic in shape.

[0049] Preferably, the buffer groove 11 is filled with a filler 13 to change the support force or buffer force of the sole 10.

[0050] The filler 13 is selected from foamed thermoplastic polyurethane, ethylene-vinyl acetate copolymer, polyurethane, thermoplastic rubber or resin, etc.

[0051] This application allows for the adjustment of the stiffness and cushioning force of different shoe soles 10 without altering the overall structural design by changing the material, quantity, and amount of filling material 13 in the cushioning groove 11. This enables the production of shoe soles 10 with multiple stiffness or cushioning levels within the same batch of products, providing production flexibility without increasing production costs and meeting the needs of different customers.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual-hardness structure for athletic shoes, characterized in that, include: Sole and upper; The upper includes a forefoot portion and a heel portion; the heel portion is provided corresponding to the heel of the foot and is used to cover the heel area of ​​the foot; The heel portion includes a sheet woven from carbon fiber, the lower edge of which is connected to the sole. The sheet body includes a central region and a ring portion surrounding the central region; the stiffness of the central region is greater than that of the ring portion.

2. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The central area is designed to correspond to the Achilles tendon tissue of the foot, and wraps around the Achilles tendon tissue of the foot from the left, right and back sides.

3. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The ring portion includes the bottom between the central area and the sole, the bottom being positioned corresponding to the calcaneus of the foot and wrapping around the calcaneus from the left, right and back sides.

4. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The central region and the ring section are two independently woven carbon fiber components that are connected together by bonding or sewing.

5. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The central region and the annular region are sheet bodies integrally woven from carbon fiber.

6. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The carbon fiber weaving density in the central region is greater than that in the ring region.

7. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The stiffness of the central region is 0.5 to 3 times that of the ring region.

8. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The carbon fiber weaving density in the central region is 1-5 times that in the ring region.

9. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The sheet and the central region, when unfolded, form an overall triangular or arc shape.

10. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The distance between the periphery of the central region and the periphery of the sheet is 0.5-3cm.

11. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The height of the sheet is 4-6 cm; And / or, the distance between the central area and the upper edge of the sole is 0.5-1.5cm.

12. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The heel portion also includes a rear extension integrally formed with the forefoot portion. The rear extension is positioned above the plate in height, and the lower edge of the rear extension is connected to the upper edge of the plate.

13. The dual-hardness structure of the athletic shoe according to claim 12, characterized in that, The stiffness of the rear extension is less than that of the ring portion. The rear extension is positioned to correspond to the ankle and wraps around the ankle from the left, right and rear sides.

14. The dual-hardness structure of the athletic shoe according to claim 1, characterized in that, The sole is provided with a cushioning groove, and the cushioning groove has two through holes on one side of the bottom surface of the sole.

15. The dual-hardness structure of the athletic shoe according to claim 14, characterized in that, The cushioning grooves are evenly distributed in the forefoot area and / or heel area of ​​the sole.

16. The dual-hardness structure of the athletic shoe according to claim 14, characterized in that, The buffer groove is in the shape of a sphere, hemisphere, or cube.

17. The dual-hardness structure of the athletic shoe according to claim 14, characterized in that, The buffer groove is filled with a filler material to change the support or cushioning force of the shoe sole.

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