Composite sole and shoe
By setting flexible traction parts above the support layer of the composite sole, adjusting the mechanical properties of the soles of the soles, the problem of the existing carbon board running shoe increased Achilles tendon and calf load, realized the effect of reducing the load of Achilles and calf, and improving the shoes of the shoes applicability.
Patent Information
- Application Number
- CN202411568800.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-01-24
AI Technical Summary
After long-term use of existing carbon plate running shoes, it will increase the load on the calf muscles and Achilles tendon, leading to the risk of Achilles tendon damage, including Achilles tendonitis, Achilles tendonitis, etc.
Designed a composite sole, including the support layer and flexible traction. By setting traction parts above the front and middle foot areas of the support layer, the reverse stretching force of the traction parts is used. In the area, adjust the mechanical performance of the sole and reduce the load of Achilles tendon and calf.
By reducing the rigidity of the forefoot and midfoot, it increases the bending and range of motion of the foot, reduces the impact transmitted to the Achilles tendon, reduces the load on the Achilles tendon, reduces the pressure on the hamstring muscles, and reduces the impact on the ankle joint. load to improve the suitability of the shoe.
Smart Images
Figure CN119344534A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of shoes, in particular to a composite sole and shoes containing the composite sole. Background Art
[0002] In the 1970s, American sports brand Nike began to use carbon fiber materials in running shoes to improve the stiffness and rebound performance of the soles. In the 1980s, carbon plate technology was further applied in running shoes to improve the stability and support of running shoes.
[0003] In recent years, carbon plate technology has been continuously optimized to further improve the sports performance of running shoes in terms of shock absorption, energy feedback, stability, etc. Carbon plate technology has played an important role in the development of running shoes. From the initial simple application to today's fine optimization, it has continuously improved the functionality and sports performance of running shoes. The development of this technology reflects the continuous response and innovation of the running shoe manufacturing industry to the needs of athletes. The impact of carbon plate running shoes on running is mainly reflected in the following aspects: First, the carbon plate can enhance the rigidity of the running shoes, ensure the stability of the arch of the foot, and provide anti-torsion protection; second, it increases the longitudinal bending rigidity of the forefoot, reduces the range of motion of the metatarsophalangeal joint, and makes the ground reaction force at the plantar action point during the push-off period move forward, the ankle joint force arm is extended, and the ankle joint leverage ratio is increased, which improves the push-off performance; third, the appropriate curvature of the carbon plate, combined with high-performance midsole materials, can improve running economy.
[0004] However, long-distance running competitions can produce high mechanical stress due to various muscle fiber injuries, metabolic disorders, muscle fatigue, and changes in muscle hardness and elasticity. Wearing carbon plate running shoes to participate in marathon competitions for a long time will have a negative impact on the runner's lower limbs, especially the Achilles tendon. The study tested the effects of different types of running shoes on the Achilles tendon load and found that compared with traditional running shoes, carbon plate running shoes significantly increased the strain and stress of the Achilles tendon. The study compared the effects of carbon plate running shoes and traditional running shoes on the Achilles tendon load during running and found that carbon plate running shoes will significantly increase the load on the Achilles tendon. Compared with traditional running shoes, carbon plate running shoes will increase the stress and strain of the Achilles tendon, thereby increasing the risk of Achilles tendon injury.
[0005] The carbon plate is embedded in the midsole. The main mechanical principle of carbon plate running shoes to increase the load on the Achilles tendon is as follows:
[0006] One is the increase in rigidity. The soles of running shoes have a high rigidity, which restricts the natural movement and deformation of the foot. This rigidity limits the natural cushioning of the foot when it touches the ground, increasing the impact force transmitted to the Achilles tendon.
[0007] The second is the increase in the lever arm. The sole of the carbon plate running shoe has a thicker forefoot part, which increases the lever arm length from the point where the foot contacts the ground to the Achilles tendon. The increase in the lever arm will amplify the torque borne by the Achilles tendon, thereby increasing the load on the Achilles tendon.
[0008] The third is the change in plantar pressure distribution. Carbon plate running shoes will change the distribution of plantar pressure, concentrating the pressure in the forefoot area. This change in pressure distribution will increase the stress at the attachment point of the Achilles tendon. It will change the range of motion of the forefoot metatarsophalangeal joint flexion and extension and increase the rigidity of the calf muscles.
[0009] In summary, most of the existing shoe technical solutions have the following problems:
[0010] First, the carbon plate is embedded into the midsole to increase the bending rigidity of the forefoot and generate new stress on the bones. Second, the impact of carbon plate running shoes on the calves is mainly reflected in the increase of leg stiffness, which will increase the degree of activation of the posterior calf muscles and increase the load on the ankle joint. Wearing carbon plate shoes for a long time is prone to overuse injuries. Third, changing the mechanical properties of the carbon plate will reduce the running propulsion effect.
[0011] Therefore, compared with traditional running shoes, long-term wearing of carbon plate running shoes will increase the activity of the calf muscles and Achilles tendon during running. This will cause the Achilles tendon to bear greater tension and stress, increasing the risk of Achilles tendon injury, including Achilles tendonitis, Achilles tendon tenosynovitis, etc. Summary of the invention
[0012] The purpose of the present invention is to provide a composite sole, which adjusts the mechanical properties of the support layer according to the mechanical characteristics of the support layer during running, combined with the composite traction device, reduces the load on the Achilles tendon and calf, and improves the applicability of the shoe. The specific technical solution is as follows:
[0013] A composite sole comprises a support layer and a flexible traction member, wherein the support layer is arranged as an integrally formed structure, the support layer comprises a toe region, a front midfoot region and a mid-heel region, the front midfoot region arches downwardly along a first direction, the traction member is arranged above the front midfoot region, the traction member comprises a first end and a second end arranged opposite to each other along the first direction, the first end is coupled with the front side of the front midfoot region, and the second end is coupled with the rear side of the front midfoot region to form a spacing space between the bottom of the traction member and the top of the front midfoot region, and the traction member can be stretched in the reverse direction during the push-off phase to apply a traction force pointing in the direction of the traction member to the mid-heel region.
[0014] Furthermore, the rigidity of the front midfoot area is a first rigidity, the rigidity of the toe area and the mid-heel area is a second rigidity, and the first rigidity is less than the second rigidity to increase the flexion and extension of the forefoot.
[0015] Furthermore, the first end is connected to a side of the front midfoot region close to the toe region, and the second end is connected to a side of the front midfoot region close to the mid-heel region.
[0016] Furthermore, it also includes a first elastic layer, which is fitted on the support layer. The first elastic layer includes a first area, a second area and a third area, which are respectively arranged corresponding to the toe area, the front midfoot area and the mid-heel area of the support layer. The first end of the traction member is connected to a side of the second area close to the first area, and the second end is connected to a side of the second area close to the third area.
[0017] Furthermore, the toe region corresponds to the toes of a human foot, the forefoot and midfoot region corresponds to the forefoot and front side of the midfoot of a human foot, and the mid-heel region corresponds to the rear side of the midfoot and the heel of a human foot.
[0018] Furthermore, the traction member is arranged corresponding to the metatarsophalangeal joint of the human foot.
[0019] Furthermore, a line connecting the midpoints between the first end and the second end of the traction member corresponds to a line connecting the forefoot metatarsophalangeal joints.
[0020] Furthermore, the traction member is a planar structure to increase the traction force of the traction member on the heel area.
[0021] Furthermore, the traction member is a line segment structure to reduce the traction force of the traction member on the heel area.
[0022] Furthermore, the line segment structure includes a first rope and a second rope arranged along a first direction, and a gap is maintained between the first rope and the second rope.
[0023] Furthermore, the traction member also has a third end and a fourth end arranged opposite to each other along the second direction, the distance between the first end and the second end is a first length, and the distance between the third end and the fourth end is a second length. The first length is 20% to 40% of the length of the sole, and the second length is 60% to 100% of the width of the sole.
[0024] Furthermore, the traction member is made of a material including polyarylate, polyimide or poly(p-phenylene benzobisoxazole).
[0025] A shoe comprises the composite sole described above.
[0026] The composite sole of the present invention has the following advantages:
[0027] By setting a flexible traction member above the front midfoot area of the support layer, and utilizing the reverse tensile force formed by the traction member being in a stretched state, the toe area and the mid-heel area are pulled toward the middle of the traction member during the push-off phase. The rigidity of the front midfoot area is lower than that of the toe area and the mid-heel area, thereby increasing the flexion range of the forefoot metatarsophalangeal joint. This does not change the rotational torque at the moment of big toe extension, does not affect or improve push-off performance, and maintains excellent forefoot propulsion while reducing the pressure on the Achilles tendon and posterior calf muscles during long-distance running, reducing the load on the ankle joint, and increasing the adaptability of the racing shoe to runners. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is an exploded view of the composite sole of the present invention.
[0029] Figure 2-1 It is a three-dimensional diagram of the support layer and the traction member in the first embodiment of the composite sole of the present invention.
[0030] Figure 2-2 It is a top view of the support layer and the traction member in the first embodiment of the composite sole of the present invention.
[0031] Figure 2-3 It is a side view of the support layer and the traction member in the first embodiment of the composite sole of the present invention.
[0032] Figure 3-1 It is a schematic diagram of the structural states of the support layer and the traction member of the composite sole of the present invention during the pedaling and stretching phase.
[0033] Figure 3-2 It is a schematic diagram of the structural states of the support layer and the traction member of the composite sole of the present invention during the push-off phase.
[0034] Figure 4-1 It is a three-dimensional diagram of the support layer and the traction member in the second embodiment of the composite sole of the present invention.
[0035] Figure 4-2 It is a top view of the support layer and the traction member in the second embodiment of the composite sole of the present invention.
[0036] Figure 5-1 It is a stereoscopic diagram of the first elastic layer and the traction member in the third embodiment of the composite sole of the present invention.
[0037] Figure 5-2 It is a top view of the first elastic layer and the traction member in the third embodiment of the composite sole of the present invention. DETAILED DESCRIPTION
[0038] In order to better understand the purpose, structure and function of the present invention, the composite sole of the present invention is described in detail below with reference to the accompanying drawings.
[0039] like Figure 1 to Figure 5-2 As shown, the composite sole includes an elastic layer and a support layer which are stacked, and the elastic layer and the support layer are overlapped to form a sole body. The sole body may include one elastic layer, or two or more elastic layers; may include one support layer, or two or more support layers. The two or more elastic layers and the support layer are overlapped and arranged in a composite manner, so that the sole has good elasticity and stability at the same time.
[0040] The support layer of the composite sole includes a toe area, a front midfoot area and a mid-heel area. The side of the sole body close to the inner side of the human foot is defined as the inner side of the sole body, the side of the sole body close to the outer side of the human foot is defined as the outer side of the sole body, the end of the sole body close to the toe is defined as the front of the sole body, and the end of the sole body close to the heel is defined as the back of the sole body. The line connecting the front and back ends is the first direction of the sole, and the line connecting the inner side and the outer side is the second direction of the sole. The front midfoot area has a downward curvature to form a downward arched structure. A flexible traction member is arranged above the front midfoot region, the traction member is made of a high-strength, low-stretch material, and is arranged above the front midfoot region in a stretched state. The traction member has a first end and a second end that are relatively arranged along a first direction, the first end is coupled to the front side of the front midfoot region, and the second end is coupled to the rear side of the front midfoot region to form a spacing space between the bottom of the traction member and the top of the front midfoot region. When the contact point of the forefoot with the ground moves forward during the push-off phase, the traction member can be stretched in the reverse direction, and the toe region and the mid-heel region are subjected to a traction force in the first direction directed to the direction of the traction member.
[0041] It should be noted that the above coupling includes a direct connection between the traction member and the supporting layer, as well as an indirect connection between the two via other structures.
[0042] In addition, the rigidity of the front midfoot area of the support layer is lower than that of the toe area and the mid-heel area, thereby reducing the rigidity of the forefoot and front midfoot of the sole, increasing the deformation of the sole, and thus increasing the bending and range of motion of the corresponding parts of the foot. This reduction in rigidity increases the natural cushioning force of the foot when it contacts the ground, and reduces the impact force transmitted to the Achilles tendon. Among them, the reduction in rigidity also shortens the length of the lever arm from the point where the foot contacts the ground to the Achilles tendon. The shortening of the lever arm reduces the torque borne by the Achilles tendon, thereby reducing the load on the Achilles tendon.
[0043] The composite sole of the present invention adjusts its mechanical properties in combination with the mechanical characteristics of the support layer during running, adopts a composite arrangement of an elastic layer and a support layer, and arranges a flexible traction member above the front midfoot area of the support layer, and utilizes the reverse tensile force formed by the traction member being arranged in a stretched state, so that when the forefoot rolls from back to front during the push-off stage, the toe area and the mid-heel area are pulled to move toward the middle of the traction member in the first direction, so as to keep the support layer from being easily deformed during the push-off stage. In addition, the rigidity of the front midfoot area is lower than that of the toe area and the mid-heel area, so as to reduce the bending rigidity of the forefoot, increase the bending range of the forefoot metatarsophalangeal joint, reduce the impact force of the ground on the forefoot and the Achilles tendon, and at the same time, increase the bending amplitude of the forefoot metatarsophalangeal joint, and the lever fulcrum of the forefoot moves backward relative to the high-rigidity support layer, thereby reducing the ankle joint resistance arm, reducing the torque on the Achilles tendon, and reducing the load on the Achilles tendon. The low-ductility traction member is in a relaxed state when the forefoot metatarsophalangeal joint is bent to the maximum, without reverse tension, thereby ensuring the mobility of the forefoot area.
[0044] In summary, the composite sole of the present invention provides a stretched traction member above the support layer, which does not change the pedal torque at the time of big toe extension, does not affect or improve the push-off performance, maintains excellent forefoot propulsion, reduces the pressure on the Achilles tendon and posterior calf muscles during long-distance running, reduces the load of the sole on the ankle joint, and improves the applicability of the composite sole and shoes.
[0045] In order to better understand the purpose, structure and function of the present invention, the composite sole of the present invention is further described in detail below with reference to the accompanying drawings, taking the specific structure of the composite sole as an example.
[0046] Example 1 Figure 1 As shown, the composite sole is composed of an elastic layer and a support layer 20, and a traction member 40 arranged above the support layer 20. The elastic layer and the support layer 20 have different elasticity and hardness. The elastic layer includes a first elastic layer 10 and a second elastic layer 30. Both the first elastic layer 10 and the second elastic layer 30 are made of high elastic material and have good elastic properties. The first elastic layer 10 and the second elastic layer 30 are arranged in an overlapping manner, the first elastic layer 10 is located above the support layer 20, and the second elastic layer 30 is located below the support layer 20. The support layer 20 includes a thin plate structure, is made of hard material, has good support performance, and includes a toe area 21, a front midfoot area 22, and a mid-heel area 23. The front and rear ends of the traction member 40 are connected to the front midfoot area 22 of the support layer 20. The first elastic layer 10 of the support layer 20, the traction member 40, the support layer 20, and the second elastic layer 30 are laminated and compositely arranged to form the overall structure of the composite sole. According to the early results of shoe biomechanics and human wearing, this preferred superposition method is conducive to production process and provides better comfortable foot feel and force feedback.
[0047] Specifically, Figure 2-1 to Figure 2-3 As shown, the toe area 21 of the support layer 20 corresponds to the toes of the human foot, the front midfoot area 22 corresponds to the forefoot and the front side of the midfoot of the human foot, and the mid-heel area 23 corresponds to the rear side of the midfoot and the heel of the human foot. The front midfoot area 22 is arched downward along a first direction to form a concave structure with a high center and a low center on the front and back sides, so as to form a bending and activity space for the metatarsophalangeal joint in the forefoot area of the foot, avoid affecting the normal dorsiflexion of the foot, and improve the exercise effect.
[0048] The flexible traction member 40 is a fiber or fabric with high-strength and low-elongation material properties, such as polyaromatic resin, polyimide or poly(p-phenylene benzobisoxazole). The traction member 40 is in a square planar structure in its unfolded state. The square here includes both a rectangular structure with symmetrical sides of equal length parallel lines and a quadrilateral structure with some curvature or symmetrical sides that are not completely equal but in a rectangular shape as a whole. The traction member 40 has a first end 41 and a second end 42 on the front and rear sides, respectively, and a third end 43 and a fourth end 44 on the inner and outer sides, respectively. The first end 41 is connected to a side of the front midfoot region 22 of the support layer 20 close to the toe direction, and the second end 42 is connected to a side of the front midfoot region 22 of the support layer 20 close to the heel direction. After the connection, the traction member 40 is in a stretched tensioned state, thereby enclosing an arched spacing space 24 below the traction member 40 and above the front midfoot region 22 of the support layer 20. The traction member 40 can be directly connected to the support layer 20 in a composite setting.
[0049] The purpose of setting the above structure is to Figure 3-1 As shown, during the extension phase when the foot contacts the ground, the bending angle of the forefoot metatarsophalangeal joint gradually increases. When the metatarsophalangeal joint is at the maximum bending angle, the pressure on the front midfoot area 22 of the support layer 20 reaches the maximum peak value. The metatarsophalangeal joint is located in the middle of the front midfoot area 22. Therefore, the middle of the front midfoot area 22 of the support member is subjected to the greatest pressure, which reduces the distance between the front and rear ends of the front midfoot area 22, and the distance between the first end 41 and the second end 42 and the connection position of the support layer 20 is reduced accordingly. The traction member 40 has a flexible characteristic, thereby switching from a stretched tension state to a bent relaxation state without reverse tension. The reverse tension here refers to the tensile force in the first direction from the front and rear ends of the sole to the middle direction. The absence of reverse tension means that the traction member 40 does not generate a pulling force in the middle direction on the support layer 20.
[0050] In addition, if Figure 3-2 As shown, in the push-off stage, the contact point between the heel and the sole support layer 20 is located at the first point 25, and the contact point between the forefoot sole support layer 20 is located at the second point 26. In the process of the contact point between the sole and the sole gradually moving forward, the first point 25 moves forward accordingly, exerting downward pressure on the front side of the support layer 20, so that the distance between the front and rear ends of the support layer 20 gradually increases, that is, the distance between the first end 41, the second end 42 and the connection position of the support layer 20 increases accordingly. Since the traction member 40 has the characteristics of high strength and low ductility, it generates reverse stretching after reaching the maximum amplitude of the stretched state. The stretching force forms a traction in the middle direction on the front and rear ends of the support layer 20 through the first end 41 and the second end 42, so that the front and rear ends of the support layer 20 are no longer deformed downward, that is, the support layer 20 is kept from being easily deformed, and a forward and upward thrust is formed on the heel through the second point 26, thereby increasing the push-off effect and maintaining and improving the athletic performance.
[0051] It can be understood that the specific shape of the above-mentioned traction member 40 can be set to a trapezoid, triangle, circle or the like according to actual needs, and the first end 41 and the second end 42 can be set to a point structure to connect with the support layer 20, as long as the traction member 40 can have no reverse tension in the extension stage, and can generate reverse tension in the separation stage so that the support layer 20 is not easily deformed.
[0052] In this embodiment, the traction member 40 is set to be square, and a traction area with a larger surface area is formed between the first end 41, the second end 42, the third end 43 and the fourth end 44, that is, the area of the traction area covers more of the front midfoot area 22, thereby a larger reverse tensile force can be formed between the first end 41 and the second end 42 of the traction member 40, thereby providing a greater forward and upward thrust for the mid-heel area 23.
[0053] Furthermore, the rigidity of the front midfoot area 22 is the first rigidity, and the rigidity of the toe area 21 and the mid-heel area 23 is the second rigidity. The first rigidity is less than the second rigidity. Since the metatarsophalangeal joint of the forefoot corresponds to the front midfoot area 22, the flexion range of the metatarsophalangeal joint of the forefoot is increased by reducing the rigidity of the front midfoot area 22, that is, the flexion and extension of the forefoot is increased, thereby reducing the impact force of the ground on the forefoot and Achilles tendon.
[0054] At the same time, due to the increase in the bending range of the forefoot metatarsophalangeal joint, the lever fulcrum where the forefoot contacts the ground moves backwards relative to the support layer 20 with high rigidity during the extension phase, thereby reducing the resistance arm distance 27 between the fulcrum and the ankle joint, thereby reducing the torque on the Achilles tendon and achieving the effect of reducing the load on the Achilles tendon.
[0055] It can be understood that since the first rigidity is less than the second rigidity, the contact distance between the forefoot and the ground in the extension phase is moved backward, which is equivalent to not changing the rotational torque of the big toe when it is extended, thereby not affecting or improving the athletic performance of pushing off. In addition, in the push-off phase, the traction member 40 can be stretched in the opposite direction to apply a traction force directed to the traction member 40 to the toe area 21 and the mid-heel area 23 of the support layer 20, while continuing to maintain the excellent propulsion of the forefoot, reducing the pressure on the Achilles tendon and the posterior calf muscles in long-distance running, reducing the load on the ankle joint, and avoiding excessive use injuries, that is, improving comfort and increasing the applicable population of the sole and shoe of the present invention.
[0056] The above-mentioned first rigidity being smaller than the second rigidity is achieved by reducing the amount of carbon fiber used, that is, reducing the number of layers of carbon fiber unidirectional prepreg tape, so that the number of layers of the part with the second rigidity is more and the number of layers of the part with the first rigidity is less.
[0057] Furthermore, the toe area 21, the front midfoot area 22 and the mid-heel area 23 on the support layer are configured as an integrally formed structure to enhance the structural strength of the support layer and improve the forward and upward thrust.
[0058] Preferably, the distance between the first end 41 and the second end 42 is a first length, and the distance between the third end 43 and the fourth end 44 is a second length. The first length is 20% to 40% of the length of the sole, where the length of the sole refers to the maximum length between the front and rear ends of the sole. The second length is 60% to 100% of the inner and outer widths of the sole, where the inner and outer widths of the sole refer to the width of the widest part of the inner and outer sides of the sole in the front midfoot area 22. The above-mentioned length setting can make the metatarsophalangeal joint of the forefoot correspond to the traction member 40, and the traction member 40 in the mid-forefoot area has a larger surface area, which can enhance the stretching of the traction member 40 on the front and rear areas of the support layer 20, and maintain or increase the thrust of the support member.
[0059] Preferably, the traction member 40 is arranged corresponding to the metatarsophalangeal joint of the human foot, so that the bending position of the metatarsophalangeal joint corresponds to the traction member 40, thereby enhancing the reverse stretching of the traction member 40 in the push-off stage. Further, the midpoint line between the first end 41 and the second end 42 of the traction member 40 corresponds to the line of the metatarsophalangeal joint of the forefoot. The correspondence here includes both the two lines being completely corresponding in the vertical direction and the existence of a small deviation in distance and angle in the vertical direction. The purpose of the above-mentioned structural arrangement is to keep the distance between the first end 41, the second end 42 and the metatarsophalangeal joint equal, so that the metatarsophalangeal joint applies relatively equal pressure to the first end 41 and the second end 42 of the traction member 40, avoids the pressure biased to one end and reduces the bending amplitude of the metatarsophalangeal joint, prevents the lever fulcrum of the forefoot contacting the ground from moving forward, reduces the moment on the Achilles tendon, and achieves the effect of reducing the load on the Achilles tendon.
[0060] Example 2 Figure 4-1 to Figure 4-2 As shown, the difference from the first embodiment is that the traction member 40 is a line segment structure, and the traction force of the traction member 40 on the heel area 23 is reduced by reducing the structural strength between the first end 41 and the second end 42.
[0061] Preferably, the traction member 40 of the line segment structure includes a first rope 45 and a second rope 46, the first end 41 of the first rope 45 and the second rope 46 is connected to one end of the front midfoot area 22 close to the toe area 21, the second end 42 of the first rope 45 and the second rope 46 is connected to one end of the front midfoot area 22 close to the mid-heel area 23, the first rope 45 and the second rope 46 are arranged along the first direction with a gap in the middle to form reverse stretching on the inner and outer sides of the support layer 20, respectively, wherein the first rope 45 is the third end 43 of the traction member 40, and the second rope 46 is the fourth end 44 of the traction member 40.
[0062] The above structure is designed for users who have a certain sports foundation or are in the training stage. By reducing the surface area of the traction member 40, the flexibility of the forefoot metatarsophalangeal area is increased. This structure also allows the metatarsophalangeal joint to have a larger flexion and extension range, thereby recruiting more muscle units and strengthening muscle training.
[0063] It is understandable that those skilled in the art can increase or decrease the number of ropes in the segment structure according to actual needs, as long as the flexibility of the forefoot metatarsophalangeal area can be increased to achieve a greater flexion and extension range of the metatarsophalangeal joint.
[0064] Example 3 Figure 5-1 to Figure 5-2 As shown, the difference from the first embodiment is that the traction member 40 is attached on top of the first elastic layer 10, the first elastic layer 10 includes a first area, a second area and a third area, which are respectively arranged corresponding to the toe area 21, the front midfoot area 22 and the mid-heel area 23 of the support layer 20, and the first end 41 of the traction member 40 is connected to a side of the second area close to the first area, and the second end 42 is connected to a side of the second area close to the third area.
[0065] Specifically, the traction member 40 is configured to be square, and a traction region with a large surface area is formed between the first end 41, the second end 42, the third end 43 and the fourth end 44, so that the first end 41 and the second end 42 of the traction member 40 form a reverse stretching pointing to the second region direction on the front and rear ends of the first elastic layer 10, and then the first elastic layer 10 guides the front and rear ends of the support layer 20 to be stretched.
[0066] Compared with directly connecting the traction member 40 to the support layer 20, the purpose of the above-mentioned structural setting is that the traction member 40 is indirectly connected to the support layer 20 through the first elastic layer 10, thereby reducing the speed and strength of the reverse stretching of the support layer 20 by the traction member 40. At the same time, the first end 41 and the second end 42 of the traction member 40 are connected to the first elastic layer 10 by a line segment, which can provide a larger forward and upward thrust for the mid-heel area 23.
[0067] The elastic layer can be made of one, two or more materials selected from nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, mixed 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, butadiene rubber, silicone rubber, EPDM rubber, natural rubber, isoprene rubber, nitrile rubber and chloroprene rubber using supercritical foaming or chemical foaming molding technology. It is characterized by a hardness of 40-45C and a density of 0.12-0.18g / cm 3The material is light, soft and elastic, and can provide excellent shock absorption and rebound effects for the midfoot to forefoot of the human foot during running. The thickness of the forefoot area of the elastic layer is uniform, and the curvature conforms to the curvature design of the forefoot area of the hard support layer 20, which is conducive to maintaining consistent dynamic deformation of the material during the stretching process, and helps to improve the comfort of repetitive exercise (running).
[0068] The above-mentioned hard support layer 20 has a Shore D hardness of 50-95 and is a support plate made of other hard materials, such as epoxy resin, phenolic resin or thermoplastic resin (thermoplastic polyurethane, polycarbonate, polymethyl methacrylate, nylon elastomer, polyether ester elastomer, polyketone, polyether ether ketone, polyether ketone ketone, polyether sulfone, polyphenylene sulfide, ABS (acrylonitrile-butadiene-styrene copolymer) or a composite material formed with inorganic fillers or long fibers or short fibers (not limited to carbon fiber, glass fiber, aramid, polyparaphenylene benzobisoxazole, polyimide, ultra-high molecular weight polyethylene fiber, polyarylate fiber, polyether ether ketone, polyether ketone ketone, basalt fiber, polyvinyl alcohol, nylon, polyester fiber, etc.).
[0069] In addition, the sole of the present invention further comprises an outer sole 50 disposed below the second elastic layer 30. The outer sole 50 is designed according to a reasonable formula to prepare an outer sole 50 material having both excellent anti-slip properties and fatigue wear resistance. The outer sole 50 is made of the thinnest thickness to meet the actual running needs, effectively reducing the thickness and weight of the sole, achieving the functional requirements of lightweight shoes, and providing the wearer with a better wearing experience. The outer sole 50 material is one or more of styrene-butadiene rubber, brominated butyl rubber, butadiene rubber, silicone rubber, ethylene-propylene-diene rubber, natural rubber, isoprene rubber, nitrile rubber, chloroprene rubber, nylon elastomer, polyurethane (thermoplastic polyurethane (including aromatic and aliphatic types), cast polyurethane, mixed 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, two or more materials to make one or more rubber or elastomer materials. The outsole 50 is cast polyurethane and has excellent wear resistance with the following properties: hardness (Shore A) 62, density 1.20 g / cm3, tensile strength 13.4 MPa, elongation at break 632%, right-angle tear strength 59.6 N / mm, Akron abrasion (1.61 km) 0.03 cm3, DIN abrasion 11 mm3, yellowing resistance level 4, aging resistance level 4.
[0070] The present invention also provides a shoe comprising the above-mentioned composite sole.
[0071] In order to provide the best force feedback performance with the support layer, we use nylon elastomer material in the first elastic layer and the second elastic layer. Its advantage is that the density is 0.12-0.14g / cm 3 , Shore C hardness is 42±3, rebound rate (Energyreturn) is 80%, peak acceleration (Peak G) is 10.1; providing light + high elastic effect.
[0072] The support layer is a hard support plate, which is a carbon fiber / polyarylate / epoxy resin composite material. The thickness of each layer is 0.1mm, and the total thickness is 1.0-1.6mm. The laying method is strong rigidity from the middle waist to the heel, weak rigidity in the forefoot, and the material laying of the middle and heel area is as follows:
[0073] (1) The first layer is 3K carbon fiber twill;
[0074] (2) second layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0075] (3) The third layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0076] (4) the fourth layer of 45-degree pre-impregnated carbon fiber unidirectional tape;
[0077] (5) Fifth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0078] (6) sixth layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0079] (7) Seventh layer - 20 prepreg carbon fiber unidirectional tape;
[0080] (8) Eighth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0081] (9) ninth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0082] (10) Tenth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0083] (11) eleventh layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0084] (12) The twelfth layer is 0 degree pre-impregnated carbon fiber unidirectional tape.
[0085] The toe area is partially laid out with
[0086] (1) The first layer is 20 degree pre-impregnated carbon fiber unidirectional tape;
[0087] (2) The second layer is -20 degree pre-impregnated carbon fiber unidirectional tape;
[0088] (3) the third layer of 45-degree pre-impregnated carbon fiber unidirectional tape;
[0089] (4) Fourth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0090] (5) fifth layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0091] (6) Sixth layer - 20 prepreg carbon fiber unidirectional tape;
[0092] (7) Seventh layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0093] (8) eighth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0094] (9) Ninth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0095] (10) The tenth layer is 20 degree pre-impregnated carbon fiber unidirectional tape.
[0096] The material layer of the front midfoot is:
[0097] (1) The first layer is 45-degree pre-impregnated carbon fiber unidirectional tape;
[0098] (2) The second layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0099] (3) the third layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0100] (4) Fourth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0101] (5) fifth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0102] (6) Sixth layer: 45% pre-impregnated carbon fiber unidirectional tape.
[0103] The traction part is partially made of polyaromatic woven fabric.
[0104] Another type of layer is that the first elastic layer and the third elastic layer are made of nylon elastomer material, which has the advantage of a density of 0.12-0.14g / cm 3 , Shore C hardness is 42±3, rebound rate (Energy return) is 80%, peak acceleration (Peak G) is 10.1; providing light + high elastic effect.
[0105] The support layer is a hard support plate, which is a carbon fiber / poly(p-phenylene benzobisoxazole) (PBO) / epoxy resin composite material. The thickness of each layer is 0.1 mm, and the total thickness is 1.0-1.6 mm. The plying method is strong in rigidity from the mid-waist to the heel and weak in rigidity from the forefoot.
[0106] Part of the material layer in the middle and heel area is:
[0107] (1) The first layer is 3K carbon fiber twill;
[0108] (2) second layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0109] (3) The third layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0110] (4) the fourth layer of 45-degree pre-impregnated carbon fiber unidirectional tape;
[0111] (5) Fifth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0112] (6) sixth layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0113] (7) Seventh layer - 20 prepreg carbon fiber unidirectional tape;
[0114] (8) Eighth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0115] (9) ninth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0116] (10) Tenth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0117] (11) eleventh layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0118] (12) The twelfth layer is 0 degree pre-impregnated carbon fiber unidirectional tape.
[0119] Part of the material layup in the toe area is:
[0120] (1) The first layer is 20 degree pre-impregnated carbon fiber unidirectional tape;
[0121] (2) The second layer is -20 degree pre-impregnated carbon fiber unidirectional tape;
[0122] (3) the third layer of 45-degree pre-impregnated carbon fiber unidirectional tape;
[0123] (4) Fourth layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0124] (5) fifth layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0125] (6) Sixth layer - 20 prepreg carbon fiber unidirectional tape;
[0126] (7) Seventh layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0127] (8) eighth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0128] (9) Ninth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0129] (10) The tenth layer is 20 degree pre-impregnated carbon fiber unidirectional tape.
[0130] The material layer of the front midfoot is:
[0131] (1) The first layer is 45-degree pre-impregnated carbon fiber unidirectional tape;
[0132] (2) The second layer - 45 degree pre-impregnated carbon fiber unidirectional tape;
[0133] (3) the third layer of 20 degree pre-impregnated carbon fiber unidirectional tape;
[0134] (4) Fourth layer - 20 degree pre-impregnated carbon fiber unidirectional tape;
[0135] (5) fifth layer of 45 degree pre-impregnated carbon fiber unidirectional tape;
[0136] (6) Sixth layer: 45% pre-impregnated carbon fiber unidirectional tape.
[0137] The material layer of the traction part is polyparaphenylene benzobisoxazole (PBO) woven fabric.
[0138] Biomechanical tests have shown that, compared with full-length carbon plate running shoes, the shoe provided by the present invention has a 5% increased range of flexion and extension of the forefoot, thereby reducing the high-rigidity driving threshold of carbon plate running shoes and increasing the runner adaptability of racing carbon plate running shoes.
[0139] The peak moment of the ankle joint is reduced by 1%, and the tension and hardness of the Achilles tendon are reduced by 8.8% and 18.3% respectively, which slows down the fatigue of the Achilles tendon to a certain extent and is more conducive to long-distance running competitions or training exercises. The comprehensive performance of extension and extension is similar to that of the full-palm carbon plate.
[0140] The terms “above”, “below” and “within” mentioned above include the number itself; the terms “exceed” and “outside” do not include the number itself.
[0141] The present invention is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be understood as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification belong to the scope of protection of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for various possible combinations.
[0142] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
Claims
1. A composite sole, characterized in that: The invention comprises a support layer and a flexible traction member, wherein the support layer is arranged as an integrally formed structure, the support layer comprises a toe region, a front midfoot region and a mid-heel region, the front midfoot region is arched downwardly along a first direction, the traction member is arranged above the front midfoot region, the traction member has a first end and a second end arranged relatively to each other along the first direction, the first end is coupled with the front side of the front midfoot region, and the second end is coupled with the rear side of the front midfoot region to form a spacing space between the bottom of the traction member and the top of the front midfoot region, and the traction member can be stretched in the reverse direction during the push-off phase to apply a traction force pointing in the direction of the traction member to the mid-heel region.
2. The composite sole according to claim 1, characterized in that: The rigidity of the front and midfoot regions is the first rigidity, and the rigidity of the toe region and the mid-heel region is the second rigidity. The first rigidity is smaller than the second rigidity, so as to increase the flexion and extension of the forefoot.
3. The composite sole according to claim 1, characterized in that: The first end is connected to a side of the front midfoot region close to the toe region, and the second end is connected to a side of the front midfoot region close to the mid-heel region.
4. The composite sole according to claim 1, characterized in that: The first elastic layer is also included, and the first elastic layer is fitted on the support layer. The first elastic layer includes a first area, a second area and a third area, which are respectively arranged corresponding to the toe area, the front midfoot area and the mid-heel area of the support layer. The first end of the traction member is connected to a side of the second area close to the first area, and the second end is connected to a side of the second area close to the third area.
5. The composite sole according to any one of claims 1 to 4, characterized in that: The toe region corresponds to the toes of the human foot, the forefoot and midfoot region corresponds to the forefoot and front side of the midfoot of the human foot, and the mid-heel region corresponds to the rear side of the midfoot and the heel of the human foot.
6. The composite sole according to claim 5, characterized in that: The traction member is arranged corresponding to the metatarsophalangeal joint of the human foot.
7. The composite sole according to claim 6, characterized in that: A line connecting the midpoints between the first end and the second end of the traction member corresponds to a line connecting the forefoot metatarsophalangeal joints.
8. The composite sole according to any one of claims 1 to 4, characterized in that: The traction member is a planar structure to increase the traction force of the traction member on the heel area.
9. The composite sole according to claim 3, characterized in that: The traction member is a line segment structure to reduce the traction force of the traction member on the heel area.
10. The composite sole according to claim 9, characterized in that: The line segment structure includes a first rope and a second rope arranged along a first direction, and a gap is maintained between the first rope and the second rope.
11. The composite sole according to claim 1 or 10, characterized in that: The traction member also has a third end and a fourth end arranged opposite to each other along the second direction, the distance between the first end and the second end is a first length, and the distance between the third end and the fourth end is a second length. The first length is 20% to 40% of the length of the sole, and the second length is 60% to 100% of the width of the sole.
12. The composite sole according to claim 1, characterized in that: The material of the traction member includes polyarylate, polyimide or poly(p-phenylene benzobisoxazole).
13. A shoe, characterized in that: The invention comprises the composite sole as claimed in any one of claims 1 to 12.