A composite sole and shoe

Abstract

The composite shoe sole of the present application comprises an upper midsole, a hard support layer and a lower midsole arranged in a superimposed manner from top to bottom. The hard support layer comprises a first elastic portion and a second elastic portion, the bifurcation position of the first elastic portion and the second elastic portion is arranged at the forefoot region, the first elastic portion and the second elastic portion are arranged at an angle from the bifurcation position towards the heel of the sole, an elastic addition portion is arranged between the first elastic portion and the second elastic portion, the elastic addition portion is located at the heel of the sole, and the first elastic portion, the second elastic portion and the elastic addition portion form a midfoot hollow structure. The composite shoe sole and the shoe of the present application are matched with a peak ground reaction force peak, increase the deformation space of the midfoot hollow structure, improve the cushioning formation of the midfoot region, reduce the impact of the ground on the human body while quickly braking, provide strong rebound potential energy for the foot, and make the transition from braking to stretching process more smooth and efficient, thereby improving the elastic boost effect on the foot.

Description

Technical Field

[0001] This invention relates to the field of footwear, and more particularly to a composite sole and a shoe. Background Technology

[0002] With the rise of national fitness, runners' physical fitness and muscle strength have significantly improved in daily training and competitions. Increased muscle strength can enhance runners' ability to control and protect themselves during running. Currently, major sports brands are focusing on ensuring sufficient muscle strength in the development of racing shoes. They embed a hard support layer in the midsole to adjust the forefoot lever fulcrum and the lever arm of the ankle and metatarsophalangeal joints, and then add high-elastic midsole materials to improve forefoot propulsion and enhance the athletic performance of racing shoes.

[0003] In long-distance running, runners experience a decline in stamina or fatigue in the latter half of the race, leading to muscle fatigue in the lower limbs and feet. This results in decreased muscle strength, which is insufficient to provide adequate rebound energy and cushioning during the transition from heel strike to midfoot. Therefore, designing a running shoe that can compensate for muscle fatigue and provide sufficient rebound energy during the transition from heel strike to midfoot is crucial for improving runner performance. Summary of the Invention

[0004] The purpose of this invention is to provide a composite sole and shoe that, when combined with the peak force of vertical ground reaction force, increases the deformation space of the hollow structure in the midfoot, enhances cushioning in the midfoot area, reduces the impact of the ground on the human body, and provides rapid braking. The specific technical solution is as follows:

[0005] A composite sole includes an upper midsole, a rigid support layer, and a lower midsole stacked from top to bottom. The rigid support layer has a dividing groove that divides the rigid support layer into a first ejector portion and a second ejector portion. The end of the dividing groove near the toe of the sole is the bifurcation point of the first ejector portion and the second ejector portion. The bifurcation point is located in the forefoot area of ​​the rigid support layer. The first ejector portion and the second ejector portion are set at an angle from the bifurcation point toward the heel of the sole. An ejector attachment portion is provided between the first ejector portion and the second ejector portion. The ejector attachment portion is located at the heel of the sole. The first ejector portion, the second ejector portion, and the ejector attachment portion form a hollow structure in the midfoot.

[0006] Furthermore, the hollow structure in the midfoot extends from the bifurcation point to the ejector attachment point along the direction from the toe to the heel.

[0007] Furthermore, the bifurcation point of the first ejection section and the second ejection section is located in the region of 55%-62% of the straight-line distance from the heel to the forefoot of the rigid support layer.

[0008] Furthermore, the first ejection section extends upward in an arc from the front and middle foot area of ​​the rigid support layer toward the heel. The first ejection section is semi-circular with a hollow area in the middle.

[0009] Furthermore, the second ejection section extends downward in an arc from the front and middle foot region of the rigid support layer toward the heel, and is located directly below the hollow region of the first ejection section.

[0010] Furthermore, the rigid support layer also includes the forefoot area, where the rigidity of the area where the first ejection part and the second ejection part bifurcate is greater than that of the second ejection part, the rigidity of the second ejection part is greater than that of the first ejection part, and the rigidity of the first ejection part is greater than that of the forefoot area.

[0011] Furthermore, the bifurcation positions of the first ejection section and the second ejection section are respectively located behind the metatarsophalangeal joint of the human foot.

[0012] Furthermore, the ejector attachment is located at the bottom of the heel of the upper midsole, protruding downwards from the lower surface of the upper midsole, and the ejector attachment narrows from the inner and outer sides towards the middle area from the bottom of the heel of the upper midsole.

[0013] Furthermore, the ejector attachment passes through the hollow area of ​​the first ejector and abuts against the upper surface of the second ejector, providing support and rebound for the second ejector.

[0014] Furthermore, the upper midsole also includes a support section, which is fitted to the upper surface of the first ejector section from the forefoot area to the heel area, thereby providing shock absorption and rebound for the foot.

[0015] Furthermore, the lower midsole includes a support sidewall located in the transition area between the forefoot and midfoot of the lower midsole, situated on both the inner and outer sides of the lower midsole, and protruding from the upper surface of the lower midsole. The support sidewall includes a first part and a second part. The first part curves upward from the forefoot to the midfoot area and fits against the lower surface of the first ejector part. The second part slopes downward along the direction from the midfoot to the heel. The first part and the second part form a stable support structure with a central protrusion.

[0016] Furthermore, the lower midsole has an arc-shaped downward slope transition structure in the middle position from the front midfoot area to the heel area. The transition structure bends downward in accordance with the curvature of the lower surface of the second ejector part and fits into the lower surface of the second ejector part.

[0017] A shoe comprising the composite sole described above.

[0018] The composite sole and shoe of this invention form a midfoot hollow structure between the first ejector part, the second ejector part, and the ejector attachment part. The bifurcation point of the rigid support layer is located in the forefoot and midfoot region, increasing the deformation space of the midfoot hollow structure. This enhances cushioning in the midfoot region, reduces pressure on the instep and tibialis anterior muscle on the front of the lower leg upon landing, lowers the impact on the body, and allows for rapid braking. During exercise, the peak force of the vertical ground reaction falls at the bifurcation point of the rigid support layer, providing strong rebound potential energy to the midfoot hollow structure. Furthermore, the second ejector part achieves maximum deformation during push-off, increasing the heel's gravitational ejection force and converting gravitational potential energy into forward propulsion kinetic energy, improving propulsion. This also makes the transition from braking to push-off smoother and more efficient, further enhancing propulsion. In addition, the narrowed design of the composite sole in the heel region significantly reduces the overall weight of the sole. Attached Figure Description

[0019] Figure 1 This is a front view of the composite sole in this invention.

[0020] Figure 2 This is an exploded view of the composite sole in this invention.

[0021] Figure 3 This is a schematic diagram of the upper and lower layers, the bottom layer, and the rigid support layer in this invention.

[0022] Figure 4a This is a front view of the rigid support layer in this invention.

[0023] Figure 4b This is a perspective view of the rigid support layer in this invention.

[0024] Figure 5a This is a schematic diagram of the split upper layer insole structure in this invention.

[0025] Figure 5b This is a schematic diagram of the integrated upper layer insole structure of the present invention.

[0026] Figure 6a This is a diagram showing the reaction force of the foot perpendicular to the ground when the heel strikes the ground.

[0027] Figure 6b This diagram illustrates the reaction force of the foot perpendicular to the ground when the midfoot and forefoot strike the ground.

[0028] Figure 6c This is a diagram showing the pressure exerted on the soles of a runner's feet during approximately 50% of the ground contact phase. Detailed Implementation

[0029] To better understand the purpose, structure, and function of this invention, the composite sole and shoe of this invention will be described in further detail below with reference to the accompanying drawings.

[0030] like Figure 1-3 As shown, the composite sole of the present invention includes an upper midsole 1, a rigid support layer 2, and a lower midsole 3, which are stacked from top to bottom. The rigid support layer 2 is provided with an arc-shaped dividing groove, which divides the rigid support layer 2 from the forefoot region into a first ejector portion 21 and a second ejector portion 22. The forefoot region is the transition area between the forefoot and midfoot of the human foot corresponding to the rigid support layer 2. The end of the dividing groove near the toe of the sole is the bifurcation position 24 of the first ejector part 21 and the second ejector part 22. The bifurcation position 24 is located in the forefoot area of ​​the rigid support layer 2. The first ejector part 21 and the second ejector part 22 are set at an angle from the bifurcation position 24 toward the direction of the heel of the sole. An ejector attachment part 11 is provided between the first ejector part 21 and the second ejector part 22. The ejector attachment part 11 is located at the heel of the sole. The first ejector part 21, the second ejector part 22 and the ejector attachment part 11 form a midfoot hollow structure 4.

[0031] like Figure 6a and 6b As shown, different landing methods result in significantly different ground impact characteristics, and the ground reaction force increases with increasing speed. Figures 6a-6b It can be seen that, regardless of the landing method, the peak force of the vertical ground reaction force lasts for approximately 50% of the contact period, i.e., during the foot-flat phase (when the center of gravity is forward); through Figure 6c It is understood that during approximately 50% of the ground contact phase, the pressure 6 on the sole of the foot is distributed between the posterior end of the connection between the first and fifth metatarsal bones and the forefoot at approximately 50% of the midfoot. At this time, the pressure center 61 of the sole is located in the area of ​​approximately 60% from the heel to the forefoot, which corresponds to the forefoot and midfoot region of the composite sole of this application. Therefore, the method of placing the bifurcation position 24 of the rigid support layer 2 in the forefoot and midfoot region increases the deformation space of the midfoot hollow structure 4, enhances cushioning formation in the midfoot region, and reduces pressure on the instep and tibialis anterior muscle on the front of the lower leg upon landing. Furthermore, during foot landing, the peak vertical ground reaction force falls at the bifurcation position 24 of the rigid support layer 2, providing strong rebound potential energy to the midfoot hollow structure 4, converting gravitational potential energy into forward propulsive kinetic energy, and improving the propulsive effect.

[0032] Preferably, the bifurcation position 24 of the first ejection section 21 and the second ejection section 22 is further defined in the region of 55%-62% of the straight-line distance from the heel to the forefoot of the rigid support layer 2. This is because, regardless of the landing method, the peak force of the vertical ground reaction force is concentrated in this region of the rigid support layer 2. When the bifurcation position 24 is set in this region, the area where the peak force of the vertical ground reaction force is located corresponds to the bifurcation position 24 of the first ejection section 21 and the second ejection section 22. At this time, under the action of the peak force of the vertical ground reaction force, the second ejection section 22 can obtain the maximum deformation during the push-off process.

[0033] Furthermore, the bifurcation position 24 is positioned behind the metatarsophalangeal joint of the human foot. The metatarsophalangeal joint is the forefoot landing joint of the human foot. During movement, the deformation of the second ejection part 22 will not affect the pushing force. At the same time, it can maximize the gravity ejection force of the heel of the shoe sole, providing the foot with a strong rebound potential energy.

[0034] like Figures 4a-4b As shown, the first ejection section 21 extends upward in an arc shape towards the heel along the bifurcation position 24. The first ejection section is semi-circular with a hollow area in the middle. The first ejection section 21 has a structure that is soft in the middle and hard on both sides. That is, the hardness of the part of the first ejection section 21 corresponding to the rear of the human heel is less than the hardness of the parts of the first ejection section 21 corresponding to the inner and outer sides of the human heel. The softer middle of the first ejection section 21 can better buffer the impact of the first peak effect of the vertical ground reaction on the heel area, while improving the stability of the heel during the landing phase of about 15%. The harder sides of the first ejection section 21 can increase the stiffness from the landing phase to the support phase, reduce material transition deformation, and shorten the transition time. The first elastic part 21 can provide strong support for the calcaneus of the heel.

[0035] The second ejection section 22 extends downward in an arc from the bifurcation position 24 toward the heel. Its structure is a narrowed plate-like structure, located directly below the arc-shaped hollow area of ​​the first ejection section 21. The rear foot area of ​​the first ejection section 21 is closely attached to the upper surface of the lower midsole 3. The second ejection section 22 serves as a support and rebound aid. Combined with the peak force of the vertical ground reaction force, it can obtain the maximum deformation during push-off, thereby enhancing the ejection propulsion effect.

[0036] The ejector attachment 11 is located at the bottom of the heel of the upper midsole 1 and protrudes downward from the lower surface of the upper midsole 1. The ejector attachment 11 narrows from the inner and outer sides towards the middle area of ​​the lower surface of the upper midsole 1. The ejector attachment 11 is made of a highly elastic material and can pass through the arc-shaped hollow area of ​​the first ejector 21 from top to bottom, abutting against the upper surface of the heel area of ​​the second ejector 22, so as to provide a pedal spring-like function for the ejection of the second ejector 22 during movement.

[0037] The hollow structure 4 in the midfoot extends from the bifurcation point 24 between the first ejection part 21 and the second ejection part 22 to the ejection attachment part 11 along the direction from the toe to the heel. The compression deformation of the hollow structure 4 in the midfoot can store energy, helping to quickly release and store energy during the support phase, making the rebound effect faster and more significant, and effectively reducing the risk of knee and ankle injuries.

[0038] like Figures 5a-5b As shown, the upper midsole 1 also includes a support part 12. The support part 12 is surrounded by a side wall protection structure 121. The side wall protection structure 121 can prevent the occurrence of foot inversion and supination. The support part 12 is fitted to the first ejection part 21 from the forefoot and midfoot area. During running, it provides shock absorption and rebound for the foot, while providing sufficient support and protection.

[0039] The ejector attachment part 11 and the support part 12 can be an integral structure or a separable structure. Preferably, they are defined as an integral structure to avoid affecting the rebound performance of the ejector attachment part 11 due to unstable connection.

[0040] like Figure 3 As shown, the lower midsole 3 includes a support sidewall 32 and a narrowed heel 31. The support sidewall 32 is located on both sides of the forefoot and midfoot area on the upper surface of the lower midsole 3 and protrudes from the upper surface of the lower midsole 3. The support sidewall 32 includes a first part 321 and a second part 322. The first part 321 curves upward from the forefoot to the midfoot area and fits against the lower surface of the first ejector part 21. The second part 322 is obliquely downward along the direction from the midfoot to the heel, with one end near the heel overlapping the upper surface of the lower midsole 3. The first part 321 and the second part 322 form a stable support structure with a raised middle section, providing strong support and protection for the first ejector part 21.

[0041] The interval area of ​​the support sidewall 32 is provided with a transition structure 34 with a relatively gentle slope relative to the support sidewall 32. It is located in the middle position of the forefoot and midfoot area on the upper surface of the lower midsole 3. The transition structure 34 bends downward in accordance with the curvature of the lower surface of the second ejector part 22 and is set to fit the lower surface of the second ejector part 22 from the forefoot and midfoot area to the heel area of ​​the upper midsole 1, so as to provide support and protection for the second ejector part 22.

[0042] The heel area of ​​the lower midsole 3 conforms to the shape of the lower surface of the second ejection part 22, forming a narrowing structure 31 from the inner and outer sides of the sole towards the middle area. This narrowing structure 31 fits against the lower surface of the second ejection part 22, protecting the second ejection part 22 from contact with the ground, providing a certain cushioning effect and improving the feel of landing.

[0043] In summary, the second ejection section 22, as a narrowed heel ejection component, branches off from the first ejection section 21 in the forefoot region of the rigid support layer 2, moving towards the heel. The width of the first ejection section 21 is greater than that of the second ejection section 22, ensuring support during the landing and push-off process while enhancing the ejection effect. The second ejection section 22 can function similarly to a pommel horse take-off board. During running, runners who land on their midfoot and forefoot use both their midfoot and forefoot for landing. However, in the latter half of a marathon, as their stamina decreases or they become fatigued, their landing pattern changes to a mixed landing pattern. After landing on their midfoot and forefoot, their heel drops slightly, lightly touching the ground before transitioning forward. During this slight heel drop, the second ejection section 22 acts as a support and rebound auxiliary structure, greatly improving the running economy of runners who land on their midfoot and forefoot. Furthermore, during the support phase, the peak force of the vertical ground reaction force is converted into forward propulsive kinetic energy through the deformation and rebound of the hollow structure 4 in the midfoot, enhancing the propulsive effect. Meanwhile, due to the narrowed structural design of the composite sole heel area,

[0044] The lower midsole 3 features a narrowing design in the heel area that conforms to the shape of the second ejector section 22, significantly reducing the overall weight of the sole. This design also adjusts the runner's landing posture, reducing the ankle dorsiflexion angle and the sagittal angle between the shoe and the ground at landing. It guides the foot towards the midfoot and forefoot, reducing the workload on the tibialis anterior muscles of the foot and lower leg. Furthermore, it provides superior cushioning of the heel area's maximum impact, i.e., the first peak of the vertical ground reaction, reducing the peak load rate and peak load factor of the ground impact during landing, thus reducing the risk of lower limb musculoskeletal injury. The downwardly extending, arc-shaped second ejector section 22 gradually increases stiffness from landing to support, reducing material deformation during the transition and shortening the transition time.

[0045] When the human foot steps on the sole, the ejection attachment 11 located between the first ejection part 21 and the second ejection part 22 can use its own high elasticity to play a spring-like rebound effect. The first ejection part 21 presses down toward the second ejection part 22, causing the midfoot hollow structure 4 to compress and deform, providing shock absorption and cushioning for the human foot, while storing energy. When the foot pushes off, the peak force of the vertical ground reaction force acts on the bifurcation position 24 of the rigid support layer 2, and the second ejection part 22 can generate maximum deformation, maximizing the heel gravity ejection force and providing strong rebound potential energy. At the same time, it makes the transition from braking to pushing off process smoother and more efficient, and better provides the pushing off propulsion effect.

[0046] The forefoot portion 23 of the rigid support layer 2 is generally spoon-shaped, with the end near the toes curving upwards to form a push-off structure. This facilitates the forward rolling of the forefoot during exercise, thereby improving athletic performance. The forefoot areas of both the upper midsole 1 and the lower midsole 3 conform to the spoon-shaped structure of the forefoot portion 23 of the rigid support layer 2, thereby increasing the rigidity of the forefoot area and reducing the range of motion of the metatarsophalangeal joint. The rigid support layer 2, combined with the high-elasticity materials of the upper midsole 1 and the lower midsole 3, provides elasticity and energy storage medium for push-off, causing the fulcrum of the forefoot area to shift forward, thereby increasing the metatarsophalangeal joint torque and further improving push-off efficiency.

[0047] The upper insole 1 and lower insole 3 can be manufactured using supercritical foaming or chemical foaming processes, and are made from one, two, or more of the following materials: nylon elastomer, polyurethane, thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, compounded polyurethane, thermoplastic polyether ester elastomer, ethylene-octene copolymer, ethylene-octene block copolymer, ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer, high-styrene rubber, brominated butyl rubber, cis-butadiene rubber, silicone rubber, EPDM rubber, natural rubber, isoprene rubber, nitrile rubber, and chloroprene rubber. They are characterized by a hardness of 40-45C and a density of 0.12-0.18 g / cm³. 3 The material is lightweight, soft, and elastic, providing excellent shock absorption and rebound for the midfoot and forefoot during running.

[0048] The rigid support layer 2 is a support plate made of other rigid materials, characterized by a Shore D hardness of 50-95, such as phenolic resin or thermoplastic resin, thermoplastic polyurethane, polycarbonate, polymethyl methacrylate, nylon elastomer, polyester elastomer, polyketone, polyetheretherketone, polyetherketoneketone, polyethersulfone, polyphenylene sulfide, ABS (acrylonitrile-butadiene-styrene copolymer), or a composite material formed with inorganic fillers or long or short fibers (not limited to carbon fiber, glass fiber, aramid, ultra-high molecular weight polyethylene fiber, polyaryl ester fiber, basalt fiber, polyester fiber, etc.).

[0049] The composite sole of this invention also includes an outsole 5, whose shape is consistent with the lower surface shape of the lower midsole 3 and is fitted to the bottom of the lower midsole 3. The outsole 5 is made of one, two, or more of the following rubber or elastomer materials: styrene-butadiene rubber, brominated butyl rubber, butadiene rubber, silicone rubber, ethylene propylene diene monomer (EPDM) rubber, natural rubber, isoprene rubber, nitrile rubber, chloroprene rubber, nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, compounded polyurethane), thermoplastic polyether ester elastomer, ethylene-octene copolymer, ethylene-octene block copolymer, ethylene-vinyl acetate copolymer, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene-styrene block copolymer, and high-styrene rubber. According to a reasonable formula, the outsole 5 simultaneously possesses excellent slip resistance and fatigue wear resistance, meeting the actual needs of running with the thinnest possible thickness. This effectively reduces the thickness and weight of the sole, achieving the functional requirement of lightweight shoes and providing the wearer with a better wearing experience.

[0050] Example 1: To provide optimal force feedback performance in conjunction with the rigid support layer 2, the upper midsole 1 and the lower midsole 3 are preferably made of nylon elastomer material, which has the advantage of a density of 0.12-0.14 g / cm³. 3 Shore C has a hardness of 42±3, an energy return of 80%, and a peak acceleration of 10.1, providing a lightweight and highly elastic effect.

[0051] The rigid support layer 2 is preferably a carbon fiber / glass fiber / epoxy resin composite material, with each layer having a thickness of 0.12 mm and a total thickness of 1.0 mm.

[0052] Furthermore, the rigidity arrangement of the four regions of the rigid support layer is as follows: the region where the bifurcation point 24 of the first ejection section 21 and the second ejection section 22 is located has a higher rigidity than the second ejection section 22; the second ejection section 22 has a higher rigidity than the first ejection section 21; and the first ejection section 21 has a higher rigidity than the forefoot portion 23. The layering method of each region is as follows:

[0053] The first ejection section 21 needs to have good support and stability. This area is preferably a carbon fiber / glass fiber / epoxy resin composite material, with each layer being 0.12 mm thick and the total thickness being 1.2 mm. The layup method is as follows:

[0054] (1) First layer 3K carbon fiber twill

[0055] (2) Second layer 45-degree carbon fiber unidirectional belt

[0056] (3) Third layer -45 degree carbon fiber unidirectional belt

[0057] (4) Fourth layer 90-degree carbon fiber unidirectional belt

[0058] (5) Fifth layer 90-degree carbon fiber unidirectional belt

[0059] (6) Sixth layer 90-degree carbon fiber unidirectional belt

[0060] (7) Seventh layer 90-degree carbon fiber unidirectional belt

[0061] (8) Eighth layer -45 degrees carbon fiber unidirectional belt

[0062] (9) Ninth layer 45-degree carbon fiber unidirectional belt

[0063] (10) Tenth layer 3K carbon fiber twill.

[0064] The second ejection section 22 provides resilience, requires a certain angle of deformation, and also needs to provide sufficient support. Therefore, it needs to have a certain degree of toughness and sufficient rigidity. This area is preferably a carbon fiber / glass fiber / epoxy resin composite material, with each layer being 0.12 mm thick and the total thickness being 1.4 mm. The layup method is as follows:

[0065] (1) First layer 3K carbon fiber twill

[0066] (2) Second layer 45-degree carbon fiber unidirectional belt

[0067] (3) Third layer 60-degree carbon fiber unidirectional belt

[0068] (4) Fourth layer -60 degree carbon fiber unidirectional belt

[0069] (5) Fifth layer 90-degree unidirectional fiberglass tape

[0070] (6) Sixth layer 90-degree carbon fiber unidirectional belt

[0071] (7) Seventh layer 90-degree carbon fiber unidirectional belt

[0072] (8) Eighth layer 90-degree unidirectional fiberglass tape

[0073] (9) Ninth layer 60-degree carbon fiber unidirectional belt

[0074] (10) Tenth layer - 60 degrees carbon fiber unidirectional belt

[0075] (11) Eleventh layer 45-degree carbon fiber unidirectional belt

[0076] (12) Twelfth layer 3K carbon fiber twill

[0077] The forefoot area 23 needs to bend, therefore requiring lower rigidity. This area is preferably constructed from a carbon fiber / glass fiber / epoxy resin composite material, with each layer 0.12 mm thick, for a total thickness of 1.2 mm. The layup method is as follows:

[0078] (1) First layer 3K carbon fiber twill

[0079] (2) Second layer 45-degree carbon fiber unidirectional belt

[0080] (3) Third layer -45 degree carbon fiber unidirectional belt

[0081] (4) Fourth layer 90-degree glass fiber unidirectional tape

[0082] (5) Fifth layer 90-degree carbon fiber unidirectional belt

[0083] (6) Sixth layer 90-degree carbon fiber unidirectional belt

[0084] (7) Seventh layer 90-degree unidirectional fiberglass tape

[0085] (8) Eighth layer -45 degrees carbon fiber unidirectional belt

[0086] (9) Ninth layer 45-degree carbon fiber unidirectional belt

[0087] (10) Tenth layer 3K carbon fiber twill

[0088] The bifurcation point 24 experiences the greatest stress and is prone to breakage, requiring sufficient support. Therefore, the area around the bifurcation point 24 needs to have maximum rigidity. This area is preferably a carbon fiber / glass fiber / epoxy resin composite material, with each layer 0.12mm thick and a total thickness of 1.6mm. The layup method is as follows:

[0089] (1) First layer 3K carbon fiber twill

[0090] (2) Second layer 45-degree carbon fiber unidirectional belt

[0091] (3) Third layer -45 degree carbon fiber unidirectional belt

[0092] (4) Fourth layer 60-degree carbon fiber unidirectional belt

[0093] (5) Fifth layer - 60-degree carbon fiber unidirectional belt

[0094] (6) Sixth layer 90-degree unidirectional fiberglass tape

[0095] (7) Seventh layer 90-degree carbon fiber unidirectional belt

[0096] (8) Eighth layer 90-degree carbon fiber unidirectional belt

[0097] (9) Ninth layer 90-degree glass fiber unidirectional tape

[0098] (10) Tenth layer - 60 degrees carbon fiber unidirectional belt

[0099] (11) Eleventh layer 60-degree carbon fiber unidirectional belt

[0100] (12) Twelfth layer -45 degrees carbon fiber unidirectional belt

[0101] (13) Thirteenth layer 45-degree carbon fiber unidirectional belt

[0102] (14) Fourteenth layer 3K carbon fiber twill

[0103] Outsole 5 can be made of cast polyurethane, which has excellent abrasion resistance, with the following properties: hardness (Shore A) 62, density 1.20g / cm3, tensile strength 13.4MPa, elongation at break 632%, right angle tear strength 59.6N / mm, Akron abrasion (1.61km) 0.03cm3, DIN abrasion 11mm3, yellowing resistance grade 4, aging resistance grade 4.

[0104] The composite sole and shoe of this invention combine ground reaction force with a design that enhances athletic performance. By positioning the bifurcation point 24 of the rigid support layer 2 at the area where the peak force of the vertical ground reaction force is located, the ejection component can achieve maximum deformation, increasing the deformation space in the midfoot area, improving cushioning formation in the midfoot area, reducing the impact of the ground on the body, and enabling rapid braking. The narrowed heel structure can adjust the landing posture and guide the landing towards the midfoot and forefoot. The narrowed heel, combined with the vertical ground reaction force ejection booster compression of the midfoot hollow structure, provides the foot with powerful rebound potential energy, making the transition from braking to extension smoother and more efficient, and providing better push-off propulsion.

[0105] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific descriptions herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0106] If the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A composite shoe sole, characterized in that, The shoe comprises an upper midsole, a rigid support layer, and a lower midsole, which are stacked from top to bottom. The rigid support layer has a dividing groove that divides the rigid support layer into a first ejector section and a second ejector section. The end of the dividing groove near the toe of the sole is the bifurcation point of the first ejector section and the second ejector section. The first ejector section and the second ejector section are set at an angle from the bifurcation point toward the direction of the heel of the sole. The bifurcation point is located in the forefoot area of ​​the rigid support layer and is correspondingly located behind the metatarsophalangeal joint of the human foot, in the 55%-62% range of the straight distance from the heel to the forefoot of the rigid support layer. An ejector attachment section is provided between the first ejector section and the second ejector section. The ejector attachment section is located at the heel of the sole. The first ejector section, the second ejector section, and the ejector attachment section form a midfoot hollow structure. The midfoot hollow structure extends from the bifurcation point to the ejector attachment section along the direction from the toe to the heel.

2. The composite sole as described in claim 1, characterized in that, The first ejection section extends upward in an arc from the front and middle foot area of ​​the rigid support layer toward the heel. The first ejection section is semi-circular with a hollow area in the middle.

3. The composite sole as described in claim 2, characterized in that, The second ejection section extends downward in an arc from the front and middle foot area of ​​the rigid support layer toward the heel, and is located directly below the hollow area of ​​the first ejection section.

4. The composite sole as described in claim 1, characterized in that, The rigid support layer also includes the forefoot area. The rigidity of the area where the first ejection part and the second ejection part bifurcate is greater than that of the second ejection part, the rigidity of the second ejection part is greater than that of the first ejection part, and the rigidity of the first ejection part is greater than that of the forefoot area.

5. The composite sole as described in any one of claims 1 to 4, characterized in that, The ejector attachment is located at the bottom of the heel of the upper midsole, protruding downwards from the lower surface of the upper midsole. The ejector attachment narrows from the inner and outer sides towards the middle area from the bottom of the heel of the upper midsole.

6. The composite sole as described in claim 5, characterized in that, The ejector attachment passes through the hollow area of ​​the first ejector and abuts against the upper surface of the second ejector, providing support and rebound for the second ejector.

7. The composite sole as described in any one of claims 1 to 4, characterized in that, The upper midsole also includes a support section, which is fitted to the upper surface of the first ejector section from the forefoot area to the heel area to achieve shock absorption and rebound for the foot.

8. The composite sole as described in claim 1 or 4, characterized in that, The lower midsole includes a support sidewall located in the transition area between the forefoot and midfoot of the lower midsole. The support sidewall is located on both the inner and outer sides of the lower midsole and protrudes from the upper surface of the lower midsole. The support sidewall includes a first part and a second part. The first part is curved upward from the forefoot to the midfoot area and fits against the lower surface of the first ejector part. The second part is inclined downward along the direction from the midfoot to the heel. The first part and the second part form a stable support structure with a central protrusion.

9. The composite sole as described in claim 8, characterized in that, The lower midsole has an arc-shaped downward slope transition structure in the middle position from the front midfoot area to the heel area. The transition structure bends downward in accordance with the curvature of the lower surface of the second ejector part and fits into the lower surface of the second ejector part.

10. A shoe, characterized in that, Includes the composite sole as described in any one of claims 1 to 9.

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