Plate for shoe sole, shoe sole and shoe

Abstract

The utility model discloses a plate for a sole, which comprises a plate body, the area of the plate body corresponding to the metatarsophalangeal joint of the foot is sunken downwards to form a sunken structure, and the section of the sunken structure in the foot width direction at least comprises an arch with an upward arch opening. The utility model further discloses a sole and a shoe with the plate. The arch opening of the downwards-concave structure of the plate faces upwards and is opposite to the forefoot transverse arch with the downward arch opening, during movement, the forefoot transverse arch is compressed downwards under the action of the force applied by the body weight and pedaling and stretching, the downwards-concave structure can deform and be compressed synchronously to absorb and disperse the applied force, the effects of supporting the forefoot transverse arch, buffering shock and reducing the pressure of the forefoot transverse arch are achieved, and meanwhile the effect of supporting the forefoot transverse arch is achieved. By means of deformation of the downward concave structure in the vertical direction (namely the thickness direction), additional springback feedback can be generated, utilization of energy at metatarsophalangeal joints is achieved, energy release of a forefoot transverse arch area is improved, and the overall force feedback efficiency of the shoe sole is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of footwear, in particular to a plate for a shoe sole, a shoe sole and a shoe. BACKGROUND

[0002] In order to improve the overall performance of sports shoes, a specially designed plate is usually ingeniously embedded in the shoe sole. This plate comes in various types, such as carbon plate, thermoplastic polyurethane (TPU) plate, nylon plate, etc. The main function of this plate is to improve the support and stability of the shoe sole, distribute the pressure and impact force during movement, reduce deformation and wear of the shoe sole, and also improve the comfort and support of the shoe sole. In addition, the elasticity and toughness of the plate can help the athlete better control the direction and intensity of movement, and also improve the stability, reaction speed and balance of the movement, thereby achieving better performance in sports competition.

[0003] Currently, this specially designed plate generally adopts a flat plate structure, such as a flat carbon plate. Although the flat carbon plate can provide certain support and stability, it has limited performance in energy feedback. It cannot effectively capture and convert the reaction force from the ground, resulting in less energy feedback to the wearer and poor force feedback efficiency. In view of this, the present case is generated. SUMMARY

[0004] In view of the above problems, the purpose of the present utility model is to provide a plate for a shoe sole, a shoe sole and a shoe, so as to improve the energy release in the forefoot transverse arch area and improve the force feedback efficiency during movement.

[0005] To achieve the above purpose, the technical solution proposed by the present utility model is as follows:

[0006] The utility model discloses a plate for shoe sole, it includes 3D structure's plate body, the plate body corresponds the area of metatarsophalangeal joint of foot to form down concave structure to be concave down, the down concave structure includes at least one arch shape with the arch mouth upward in the cross section in foot width direction.

[0007] Preferably, the curvature of the down concave structure gradually decreases from the middle part to the front and / or gradually decreases from the middle part to the back, which makes the cross section of the down concave structure in the foot length direction present an arc or arch shape concave downward, can store energy and release when the foot swings forward, thereby pushing the wearer to move forward, can provide better propulsion for the extension stage. In addition, it can also better guide the mechanical transmission of the foot, so that the wearer can exert force more smoothly during movement, which is beneficial to reducing energy loss and improving movement efficiency.

[0008] Preferably, the plate corresponds to the area of the phalanges of the foot and is tilted forward along the foot length direction, which helps to improve the extension force of the wearer's phalanges, increase the propulsion, reduce energy loss, and achieve better extension efficiency.

[0009] Preferably, the lower concave structure extends forward to completely or partially cover the area of the plate body corresponding to the toes of the foot, and / or the lower concave structure extends backward to completely or partially cover the area of the plate body corresponding to the metatarsal bones of the foot. Expanding the coverage range of the lower concave structure in front and back can increase the stress area of the plate body, improve the energy storage, and further improve the energy release of the forefoot arch area, and on the other hand, it can improve the comfort of the movement.

[0010] As an improvement of the utility model, the lower concave structure comprises a lower concave part and wing support parts extending outward from the inner and outer sides of the lower concave part. The wing support part can increase the contact area (not direct contact) of the lower concave structure with the foot, play a certain supporting role, improve the comfort of the foot stepping, and on the other hand, it can ensure that the lower concave structure can expand outward when it is deformed under pressure, and guarantee the effectiveness of the elastic potential energy stored by the lower concave structure under pressure.

[0011] Preferably, the wing support part gradually transitions to be flat outward from the connection with the lower concave part.

[0012] Preferably, the width of the lower concave part accounts for 45% to 90% of the width of the lower concave structure.

[0013] As an improvement of the utility model, at least one stress release groove is provided in the area of the plate body corresponding to the forefoot of the foot.

[0014] Preferably, at least one stress release groove is provided on the inner side of the area of the plate body corresponding to the forefoot of the foot, and / or at least one stress release groove is provided on the outer side of the area of the plate body corresponding to the forefoot of the foot.

[0015] Preferably, the stress release groove is provided extending inward from the edge of the plate body.

[0016] Preferably, the depth of the stress release groove extending inward in the width direction of the foot accounts for one third of the width of the plate body. To balance the overall rigidity and deformation ability of the plate body.

[0017] Preferably, the stress release groove is located in the area of the plate body corresponding to the metatarsophalangeal joint of the foot and / or the area corresponding to the metatarsal bone of the foot.

[0018] Preferably, the stress release groove is linear or V-shaped or arc-shaped.

[0019] Preferably, the width of the stress release groove is 1 to 5 mm.

[0020] As an improvement of the utility model, the thickness of the lower concave structure is greater than the thickness of other parts of the plate body.

[0021] Preferably, the thickness of the lower concave structure is the thickest at the region corresponding to the second to third metatarsal bones of the foot, so that the lower concave structure bears greater pressure, thereby improving the service life and safety of the plate.

[0022] Preferably, the thickness of the lower concave structure gradually decreases from the second metatarsal bone to the first metatarsal bone and gradually decreases from the third metatarsal bone to the fifth metatarsal bone, so as to optimize the distribution of stress and make the overall structure of the lower concave structure more reasonable and efficient, while maintaining the strength and stability of the lower concave structure, the overall weight of the plate is reduced.

[0023] Preferably, the thickness of the lower concave structure can be selected from 1.0 to 1.8 mm, preferably 1.0 to 1.5 mm.

[0024] The utility model discloses a kind of shoe soles using the above plate, the shoe sole includes insole and the above plate embedded in insole.

[0025] Further, the maximum depth of the lower concave structure accounts for 38% to 86% of the thickness of the insole.

[0026] Further, the maximum depth of the lower concave structure is 10 to 30 mm, and the thickness of the insole is 13 to 35 mm.

[0027] Further, the spacing between the lower concave structure and the upper surface of the insole accounts for 7% to 30% of the thickness of the insole, and the spacing between the lower concave structure and the lower surface of the insole accounts for 7% to 30% of the thickness of the insole. While ensuring the full use of the plate's rebound performance, the insole's shock absorption and rebound performance, as well as the comfort of the shoe sole, are not excessively limited.

[0028] The utility model discloses a kind of shoes using the above shoe sole.

[0029] By adopting the above technical solutions, the utility model has the following beneficial effects:

[0030] (1) The plate body of the utility model is at least concave downward to form a lower concave structure corresponding to the region of metatarsophalangeal joint of the foot, and the lower concave structure has an upward arch, which is opposite to the downward arch of the forefoot transverse arch. During movement, the forefoot transverse arch is compressed downward by the weight and the applied force of stretching, and the lower concave structure can be deformed synchronously to compress and absorb and disperse the applied force, thereby supporting the forefoot transverse arch, reducing the pressure on the forefoot transverse arch, and providing additional rebound feedback through the deformation of the lower concave structure in the vertical direction (i.e., the thickness direction), which realizes the utilization of energy at the metatarsophalangeal joint, improves the energy release in the forefoot transverse arch region, and enhances the overall force feedback efficiency of the shoe sole.

[0031] (2) The plate of this utility model is provided with stress relief grooves. When the foot lands, the stress relief grooves can cut off the force transmission of the plate as a whole. On the one hand, the force is concentrated on the metatarsophalangeal joint of the forefoot and the plate is compressed to produce deformation. On the other hand, it can maintain the flexible bending performance of the sole and improve the comfort of wearing the shoe.

[0032] (3) The thickness of the concave structure of this utility model is greater than the thickness of other parts of the plate. Increasing the thickness of the concave structure can enhance the rigidity of the concave structure, increase the stress of the concave structure, enable the concave structure to store more elastic potential energy, and at the same time improve the continuity of function and the durability of structure.

[0033] (4) By setting a plate inside the midsole of the shoe sole, the concave structure of the plate can store elastic potential energy as the forefoot transverse arch is compressed and deformed after the forefoot touches the ground and before it leaves the ground. During the process of leaving the ground, the stored elastic potential energy is released to provide rebound force feedback to the foot, realize the utilization of energy at the metatarsophalangeal joint, improve the energy release in the forefoot transverse arch area, and improve the overall force feedback efficiency of the shoe sole.

[0034] (5) In the sole of this utility model, the maximum depth of the concave structure accounts for 38% to 86% of the thickness of the midsole, so that the shoe can provide sufficient support and stability while maintaining lightness and flexibility, and ensure that the rebound performance of the plate is fully utilized, thereby improving running efficiency and speed. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the plate in Example 1.

[0036] Figure 2 for Figure 1 A side view diagram.

[0037] Figure 3 for Figure 1 A top-down view.

[0038] Figure 4 for Figure 3 Schematic diagram of sectional view AA.

[0039] Figure 5 for Figure 3 Schematic diagram of the BB section.

[0040] Figure 6 for Figure 3 Schematic diagram of the CC section.

[0041] Figure 7 for Figure 3 Schematic diagram of the cross-section of DD.

[0042] Figure 8 for Figure 3Schematic diagram of the EE section.

[0043] Figure 9 This is a simplified diagram illustrating the principle of the board in Example 1.

[0044] Figure 10 This is a three-dimensional structural diagram of a plate according to another preferred embodiment of the present invention.

[0045] Figure 11 for Figure 10 Schematic diagram of sectional view AA.

[0046] Figure 12 This is a three-dimensional structural diagram of a plate according to another preferred embodiment of the present invention.

[0047] Figure 13 for Figure 12 A side view diagram.

[0048] Figure 14 This is a three-dimensional structural diagram of the plate in Example 2.

[0049] Figure 15 for Figure 14 A top-down view.

[0050] Figures 16-19 This is a top view of a plate according to another preferred embodiment of the present invention.

[0051] Figure 20 This is a cross-sectional view of the plate in the foot length direction of Embodiment 3.

[0052] Figure 21 This is a cross-sectional view of the area of ​​the plate corresponding to the metatarsal bones of the foot in the foot width direction of Embodiment 3.

[0053] Figure 22 This is a top view of the midsole of Example 4.

[0054] Figure 23 for Figure 14 Schematic diagram of sectional view AA.

[0055] Figure 24 for Figure 14 Schematic diagram of the BB section.

[0056] Figure 25 This is a clustered bar graph showing the single-step step length of the experimental and control examples in Example 5.

[0057] Figure 26 This is a clustered bar graph showing the single-step time of the experimental and control examples in Example 5.

[0058] Figure 27 This is a stacked bar chart showing the percentage of support time and levitation time for the experimental and control examples in Example 5.

[0059] 1, plate body; 11, area corresponding to the phalanges of the foot; 12, area corresponding to the metatarsophalangeal joints of the foot; 13, area corresponding to the metatarsal bones of the foot; 14, area corresponding to the midfoot of the foot; 15, area corresponding to the hindfoot of the foot; 2, concave structure; 21, concave portion; 22, wing support portion; 3, stress release groove; 4, midsole. DETAILED DESCRIPTION

[0060] The utility model will be further described below in combination with the drawings and specific embodiments.

[0061] In the following description, the terms indicating the orientation of the foot length direction, the foot width direction, front, back, inner side, and outer side are observed from the perspective of the wearer, such as front refers to the toe direction, back refers to the heel direction, inner side refers to the inner side of the foot in the foot width direction (the first toe side of the foot), and outer side refers to the outer side of the foot in the foot width direction (the fifth toe side of the foot).

[0062] The foot includes the forefoot, the midfoot, and the hindfoot. According to the functional anatomy analysis of the foot during movement, the forefoot includes two important structures of the foot: the forefoot transverse arch and the metatarsophalangeal joint, and the forefoot transverse arch is composed of the first to fifth metatarsal heads. In walking, running, jumping, and changing direction, the forefoot transverse arch is an important load-bearing area and force transmission area of the human body. The metatarsophalangeal joint is composed of the five metatarsal heads and the proximal phalanx base, and for the foot flexion movement of rapid take-off from the ground such as running and jumping, the final occurrence of the movement must be at the metatarsophalangeal joint. According to relevant research results, it is shown that during the braking stage of movement, the forefoot transverse arch bears and absorbs the ground reaction force impact; during the take-off stage of movement, the force generated by the hip, knee, and ankle can be transmitted from the hindfoot to the forefoot transverse arch area and released in the area, so as to promote the body to take off from the ground.

[0063] Most of the existing soles only focus on the support stability performance of the sole and the force of the foot palm, and few studies on the energy at the metatarsophalangeal joint through the material and structure of the sports shoes to utilize the energy at the metatarsophalangeal joint to improve the technology related to the energy release of the forefoot transverse arch. The utility model studies this and obtains a plate, a sole, and a shoe for utilizing the energy at the metatarsophalangeal joint of the foot to improve the energy release of the forefoot transverse arch, and a method for improving the force feedback efficiency of the sole.

[0064] Embodiment one

[0065] Figure 1 The plate for the left foot is shown, and the plate for the right foot is a shape symmetrical to the left and right, and the plate for the right foot is not shown.

[0066] The plate can be made of fiber reinforced resin, such as T700 carbon plate, T800 carbon plate. As the fiber used in the fiber reinforced resin, such as carbon fiber, glass fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, modified polyphenylene ether fiber, boron fiber, etc.

[0067] As Figure 3 The position relationship between the plate of the embodiment and the foot of the wearer is shown, the plate of the embodiment is a full-palm plate, and in other embodiments, it can also be a local carbon plate covering only the metatarsophalangeal joint or a half-palm carbon plate. In the embodiment, the plate covers the entire sole from the toe to the heel, which includes a plate body 1 with a 3D structure, the plate body 1 has an area corresponding to the forefoot of the foot, an area 14 corresponding to the midfoot of the foot, and an area 15 corresponding to the hindfoot of the foot, wherein the area corresponding to the forefoot of the foot is divided into an area 11 corresponding to the phalanges of the foot and an area 13 corresponding to the metatarsal bones of the foot. Because the metatarsophalangeal joint is composed of the metatarsal head and the proximal phalanx base, the area 12 of the plate body 1 corresponding to the metatarsophalangeal joint of the foot is located at the junction of the area 11 corresponding to the phalanges of the foot and the area 13 corresponding to the metatarsal bones of the foot and partially overlaps with both.

[0068] The area of the plate body 1 corresponding to the forefoot of the foot is an area coinciding with the forefoot of the wearer in the thickness direction of the plate body 1, and correspondingly, the area 11 of the plate body 1 corresponding to the phalanges of the foot, the area 12 corresponding to the metatarsophalangeal joint of the foot, the area 13 corresponding to the metatarsal bones of the foot, the area 14 corresponding to the midfoot of the foot, and the area 15 corresponding to the hindfoot of the foot are areas coinciding with the phalanges of the foot, the metatarsophalangeal joint of the foot, the metatarsal bones of the foot, the midfoot of the foot, and the hindfoot of the foot of the wearer, respectively.

[0069] The area 12 of the plate body 1 of the embodiment corresponding to the metatarsophalangeal joint of the foot is concave downward to form a concave structure 2, and the cross section of the concave structure 2 in the width direction of the foot includes an arch with the arch opening upward.

[0070] Figure 5 is a sectional view of the area 12 of the plate body 1 corresponding to the metatarsophalangeal joint of the foot in the width direction of the foot, and the dashed part is the five metatarsal bones of the foot, and the forefoot transverse arch is composed of the first to fifth metatarsal heads. Under non-weight-bearing conditions, the first and fifth metatarsal heads are in contact with the ground through soft tissue, while the second to fourth metatarsal heads are away from the ground, among which the second metatarsal head is the highest. The center line shows the shape of the forefoot transverse arch, which is in the shape of an arch with the arch opening downward in the width direction of the foot, while the concave structure 2 of the present application has the arch opening upward and is opposite to the forefoot transverse arch. During exercise, the forefoot transverse arch is compressed downward by the body weight and the applied force of the stretch, and the concave structure 2 deforms synchronously and is compressed, absorbing and dispersing the applied force, supporting the forefoot transverse arch, cushioning, and reducing the pressure on the forefoot transverse arch.

[0071] Referring to Figure 9, the upper convex arc line in the figure represents the forefoot transverse arch, and the lower concave arc line represents the lower concave structure 2. During the movement, after the forefoot lands, the lower concave structure 2 starts to compress, and when the pressure is the largest, the lower concave structure 2 is compressed and deformed to the maximum, and part of the ground reaction force is converted into the elastic potential energy of the lower concave structure 2. When the forefoot starts to lift off the ground, the pressure applied by the foot to the lower concave structure 2 gradually decreases, the lower concave structure 2 gradually recovers to the original state, and releases the stored elastic potential energy, giving the foot a rebound feedback. When the toes are off the ground, the lower concave structure 2 recovers to the original state. It can be understood that as long as the inner and outer sides of the lower concave structure 2 (i.e. the first toe side and the fifth toe side) are first contacted and pressed, the effect of improving the energy feedback rate can be achieved, therefore, under the premise of ensuring that the middle of the lower concave structure 2 is low and the two sides are high, the cross section of the lower concave structure 2 in the foot width direction can also include two or more arches, such as Figure 10 and Figure 11 .

[0072] It can be seen that through the deformation of the lower concave structure 2 in the vertical direction (i.e. the thickness direction), additional rebound feedback can be generated, the energy at the metatarsophalangeal joint can be utilized, the forefoot transverse arch area energy release can be improved, and the overall feedback efficiency of the shoe sole can be improved.

[0073] In addition, the plate of the utility model still has the following technical effects:

[0074] 1. Dynamic fitting, improving wearing comfort: The force feedback function dynamically adjusts the support and cushioning of the sole by sensing the pressure distribution during foot movement, making the shoe more fitted to the foot shape and reducing friction and discomfort.

[0075] 2. Reducing sports injuries: The force feedback function can monitor and adjust the absorption and rebound of the sole to impact force in real time, reducing the overloading of joints and muscles and reducing the risk of sports injuries.

[0076] 3. Optimizing gait: By feeding back the foot pressure distribution, it helps to correct bad gait such as pronation or supination, promotes natural gait, and reduces the negative impact of long-term exercise on the body.

[0077] 4. Improving exercise efficiency: Good force feedback can effectively store and release energy, reduce energy loss, improve exercise performance, and reduce fatigue.

[0078] 5. Preventing chronic injuries: By continuously optimizing gait and reducing impact, the force feedback function helps prevent chronic injuries caused by improper long-term exercise, such as plantar fasciitis and knee arthritis.

[0079] 6. Promoting recovery: Some force feedback systems can also provide massage or micro-vibration after exercise to promote blood circulation and speed up muscle recovery.

[0080] The force feedback function of the plate not only improves the comfort of the sports shoes, but also significantly improves the sports health by optimizing the gait, reducing injuries and improving efficiency.

[0081] The specific range of the concave structure 2 can be adjusted according to actual needs, for example, the concave structure 2 extends forward to partially / fully cover the area 11 of the plate body 1 corresponding to the phalanges of the foot, and extends backward to partially / fully cover the area 13 of the plate body 1 corresponding to the metatarsal bones of the foot. Figure 12 and Figure 13 As shown in the drawings, the concave structure 2 of the plate body 1 extends forward to partially cover the area 11 of the plate body 1 corresponding to the phalanges of the foot, and extends backward to fully cover the area 13 of the plate body 1 corresponding to the metatarsal bones of the foot. Enlarging the coverage range of the concave structure 2 forward and backward can increase the force receiving area of the plate body 1, improve the energy storage, and further improve the energy release of the forefoot transverse arch area, and can also improve the comfort of the sports.

[0082] Referring to Figures 1-8 , the concave structure 2 of the embodiment completely covers the area 11 of the plate body 1 corresponding to the phalanges of the foot forward, and completely covers the area 13 of the plate body 1 corresponding to the metatarsal bones of the foot backward, that is, the concave structure 2 of the embodiment is formed by the whole area of the plate body 1 corresponding to the forefoot of the foot being concave downward.

[0083] In combination Figures 2-8 , the curvature of the concave structure 2 of the embodiment gradually decreases from the middle part forward, and also gradually decreases from the middle part backward, so that the cross section of the concave structure 2 in the foot length direction is in the shape of an arc or an arch concave downward, which is beneficial to improve the deformation ability of the concave structure 2, increase the force arm effect on the metatarsophalangeal joint, and can match the gait, improve the fluency, comfort and efficiency during running or walking.

[0084] As shown in the drawings, Figure 2 and Figure 8 , the area 11 of the plate body 1 corresponding to the phalanges of the foot is tilted forward along the foot length direction, which is helpful to improve the toe bone extension force of the wearer, increase the propulsion, reduce energy loss, and achieve better extension efficiency. The area 11 of the plate body 1 corresponding to the phalanges of the foot is tilted forward in combination with the concave shape of the concave structure 2 in the foot length direction, so that the plate bottom is generally in the shape of a shovel in the foot length direction, which can reduce the bending of the metatarsophalangeal joint of the foot in the foot length direction, thereby reducing the energy loss during sports, improving the ground impact, increasing the forward propulsion, and ensuring the stability and efficiency of the transition from landing to ground.

[0085] In other preferred embodiments of the utility model, the area 11 of the plate body 1 corresponding to the phalanges of the foot can also be parallel to the horizontal plane.

[0086] Referring to Figure 6The concave structure 2 of the embodiment comprises a concave portion 21 in the middle of the width direction of the foot and wing support portions 22 extending outward from both sides of the concave portion 21. The wing support portions can increase the contact area (indirect contact) between the concave structure 2 and the foot, play a certain supporting role, improve the comfort of the foot stepping, and ensure that the concave structure 2 can expand outward when deformed under pressure, thereby ensuring the effectiveness of the elastic potential energy stored by the concave structure 2 under pressure.

[0087] The concave portion 21 and the wing support portions 22 on both sides thereof are connected smoothly to reduce stress concentration at the connection between the concave portion 21 and the wing support portions 22 and enhance the structural strength of the concave structure 2. The wing support portions 22 can extend outward in an arc or a straight line from the connection with the concave portion 21. The wing support portions 22 preferably gradually taper outward to be parallel to the horizontal plane or slightly upward relative to the horizontal plane to improve the comfort of wearing.

[0088] The width L of the concave portion 21 of the embodiment accounts for 45% to 90% of the width S of the concave structure 2, preferably 50% to 70%.

[0089] Under the premise that the concave depth of the concave structure 2 is constant, the smaller L / S is, the steeper the curvature of the concave structure 2 is, the stronger the rigidity is, and the smaller the deformation under the same pressure is. This scheme is suitable for people with larger impact forces, such as adults. The larger L / S is, the gentler the curvature of the concave structure 2 is, the smaller the rigidity is, and the larger the deformation under the same pressure is. This scheme is suitable for people with smaller impact forces, such as children.

[0090] It can be understood that in other preferred embodiments of the utility model, the concave structure 2 can also cancel the wing support portions 22.

[0091] Embodiment Two

[0092] Referring to Figure 14 and Figure 15 , the plate body 1 of the embodiment is improved on the basis of embodiment one. The plate body 1 corresponds to the region of the forefoot of the foot and is provided with two stress release grooves 3. The two stress release grooves 3 are respectively located on the inner and outer sides of the region 13 of the plate body 1 corresponding to the metatarsal bones of the foot. The stress release grooves 3 extend inward from the edge of the plate body 1.

[0093] The number and position of the stress release grooves 3 can be adjusted according to actual needs. For example, as shown in Figure 16 , the plate body 1 is provided with four stress release grooves 3 in the region corresponding to the forefoot of the foot, as shown in Figure 17 , the stress release grooves 3 are located in the middle of the plate body 1, and as shown in Figure 18As shown, the stress release groove 3 is arranged in the area 12 of the plate body 1 corresponding to the metatarsophalangeal joint of the foot. Of course, the stress release groove 3 can also be arranged at the junction of the area 12 of the plate body 1 corresponding to the metatarsophalangeal joint of the foot and the area 13 of the plate body 1 corresponding to the metatarsal bone, or across the aforementioned two areas, such as extending inward from the edge of the area 13 of the plate body 1 corresponding to the metatarsal bone to the area 12 of the plate body 1 corresponding to the metatarsophalangeal joint.

[0094] The stress release groove 3 can cut off the force transmission of the plate as a whole when the foot lands, on the one hand, concentrating the force on the metatarsophalangeal joint of the forefoot, and compressing the plate to deform, on the other hand, being able to maintain the flexible bending performance of the sole, and improve the comfort of wearing the shoe.

[0095] In order to balance the overall rigidity and deformation ability of the plate body 1, the depth b of the inward extension of the stress release groove 3 in the foot width direction (the orthogonal projection of the stress release groove 3 in the foot width direction) is preferably one third of the width c of the plate body 1.

[0096] The shape of the stress release groove 3 is not limited, such as the straight line shape of the embodiment, Figure 18 the V shape shown, Figure 19 the arc shape, etc.

[0097] The width d of the stress release groove 3 is preferably 1-5mm.

[0098] Example Three

[0099] This embodiment limits the thickness of the plate body 1 on the basis of Example One. As shown, Figure 20 the thickness e of the concave structure 2 is limited to be greater than the thickness of other parts of the plate body 1.

[0100] Increasing the thickness of the concave structure 2 can enhance the rigidity of the concave structure 2, enhance the stress of the concave structure 2, and enable the concave structure 2 to store more elastic potential energy.

[0101] The thickness of the concave structure 2 can be selected to be 1.0-1.8mm, preferably 1.0-1.5mm.

[0102] The thickness of the plate body 1 at different positions can be set according to the following schemes, in the foot length direction:

[0103] ① The front end of the plate body 1: 1.0mm, the deepest part of the concave structure 2: 1.2mm, the rear part of the plate body 1: 0.8-1.0mm;

[0104] ② The front end of the plate body 1: 1.5mm, the deepest part of the concave structure 2: 1.8mm, the rear part of the plate body 1: 1.2mm;

[0105] ③ The front end of the plate body 1: 1.2mm, the deepest part of the concave structure 2: 1.5mm, the rear part: 1.0mm.

[0106] Referring to Figure 21 , Figure 21 is a schematic view of the region 13 of the plate 1 corresponding to the metatarsal bones of the foot in the transverse direction of the foot, the dashed part is the five metatarsal bones of the foot, the first metatarsal bone to the fifth metatarsal bone are arranged from right to left, the forefoot transverse arch is formed by the first to fifth metatarsal heads, among the forefoot transverse arch, the first and fifth metatarsal heads are in contact with the ground through soft tissues, while the second to fourth metatarsal heads are away from the ground, among them, the second metatarsal head is the highest away from the ground, the deepest part of the concave structure 2 of the present embodiment corresponds to the region of the second and third metatarsal bones, when the concave structure 2 is subjected to external force, the deepest part is often the region of stress concentration, increasing the thickness of this region can enhance the overall structural strength of the concave structure 2, so that it can withstand greater pressure, thereby improving the service life and safety of the plate. The increase in the thickness of the deepest part of the concave structure 2 can make this region better store energy when stressed, and quickly release these energies when pushing off the ground, thereby improving the energy release in the forefoot transverse arch region. Therefore, in the region 16 of the concave structure 2 corresponding to the second to third metatarsal bones of the foot, the thickness of this part is the thickest.

[0107] The thickness e of the concave structure 2 gradually decreases from the second metatarsal bone to the first metatarsal bone, and gradually decreases from the third metatarsal bone to the fifth metatarsal bone. When the concave structure 2 is compressed, in the transverse direction of the foot, the stress will be distributed along the arc-shaped cross-sectional shape of the concave structure 2, gradually decreasing in thickness from the deepest part of the concave structure 2 to the inner and outer sides. The gradual decrease in thickness from the deepest part of the concave structure 2 to the inner and outer sides can optimize the distribution of stress, making the overall structure of the concave structure 2 more reasonable and efficient. The design of gradually decreasing thickness from the deepest part of the concave structure 2 to the inner and outer sides can also improve the rebound performance, the inner and outer sides of the concave structure 2 can better rebound, release the stored energy, and more effectively transmit the energy to the foot, improving the rebound feedback of the foot.

[0108] In addition, the gradual decrease in thickness from the deepest part to the two sides can reduce the overall weight of the plate while maintaining the strength and stability of the concave structure 2,

[0109] Example Four

[0110] Figure 22 The sole for the left foot is shown, the sole for the right foot is a shape symmetrical to it, and the sole for the right foot is not shown.

[0111] As Figures 22-24 shown, the sole of the present embodiment includes a midsole 4 and a plate embedded in the midsole 4, the plate is the plate described in any one of the preceding embodiments one to three. The concave structure 2 of the plate can be compressed and deformed with the forefoot transverse arch after the forefoot lands, before pushing off the ground, store elastic potential energy, release the stored elastic potential energy in the process of pushing off the ground, provide rebound force feedback to the foot, realize the utilization of energy at the metatarsophalangeal joint, improve the energy release in the forefoot transverse arch region, and improve the overall force feedback efficiency of the sole.

[0112] The sole of the present embodiment can be made by a conventional "sandwich" midsole process, in which the midsole 4 includes an upper midsole 4, a plate, and a lower midsole 4, the lower surface of the upper midsole 4 is adapted to the shape of the upper surface of the plate, the upper surface of the lower midsole 4 is adapted to the shape of the lower surface of the plate, and the upper midsole 4, the plate, and the lower midsole 4 are bonded together by glue. In addition, an integrated midsole process can also be used, in which the plate is "stuck" together directly during the foaming process of the midsole 4, so as to reduce the influence of glue on the material properties of the midsole 4 in the conventional "sandwich" midsole 4 process, and to improve the overall performance and stability of the sole.

[0113] The midsole 4 material is diverse, and the common midsole 4 materials on the market at present include EVA (ethylene-vinyl acetate), TPU (thermoplastic polyurethane), PEBA (polyether block amide), etc. The performance of the midsole 4 depends not only on the material itself, but also on the foaming process, such as the supercritical foaming process. The foaming process is to form micro pores inside the material by chemical reaction or physical method, so as to improve the resilience and shock absorption effect of the material, and improve the overall performance of the sole.

[0114] The ratio of the depth of the lower concave structure 2 of the plate to the thickness of the midsole 4 has an important influence on the performance of the sole and the wearing experience. If the depth of the lower concave structure 2 is too deep and the midsole 4 is too thin, it may cause excessive impact and discomfort to the foot; and if the midsole 4 is too thick and the depth of the lower concave structure 3 is too shallow, it may weaken the support and stability of the shoe. The depth of the lower concave structure 2 of the plate and the thickness of the midsole 4 need to work together to fully exert the performance of the plate and the midsole 4 material.

[0115] Referring to Figure 23 , the maximum depth h of the lower concave structure 2 of the present embodiment accounts for 38% to 86% of the thickness a of the midsole 4. A reasonable depth of the lower concave structure 2 and the thickness of the midsole 4 can make the sole provide sufficient support and stability while maintaining lightness and flexibility, ensure that the resilience performance of the plate is fully exerted, and thus improve running efficiency and speed.

[0116] The maximum depth h of the lower concave structure 2 is 10 to 30 mm. The thickness a of the midsole 4 is 13 to 35 mm, preferably 18 to 35 mm.

[0117] In addition, the placement position of the plate also has an important influence on the performance and comfort of the sole. If the spacing between the lower concave structure 2 and the upper surface of the midsole 4 is too large, the deformation ability of the lower concave structure 2 will be weakened, and the rebound force from the plate may be absorbed by the upper midsole part, thereby reducing its resilience performance; if the spacing between the lower concave structure 2 and the upper surface of the midsole 4 is too small, it may not provide sufficient shock absorption effect, and the hard texture of the plate may also be directly transmitted to the foot, resulting in poor comfort of wearing.

[0118] The moderate distance between the concave structure 2 and the upper surface of the midsole 4 can ensure the full rebound of the plate when it is bent, and at the same time provide sufficient cushioning effect, reduce the impact on the foot during the movement, and improve the comfort of the movement.

[0119] The distance between the concave structure 2 and the upper surface of the midsole 4 accounts for 7% to 30% of the thickness of the midsole, and the distance between the concave structure 2 and the lower surface of the midsole 4 accounts for 7% to 30% of the thickness of the midsole. This ratio can ensure that the rebound performance of the plate is fully utilized while not excessively limiting the cushioning and rebound performance of the midsole and the comfort of the sole. Preferably, the concave structure 2 is placed in the middle of the thickness of the midsole 4 to help disperse the impact force generated during the movement and reduce the degree of wear of the material of the midsole 4, thereby prolonging the service life of the shoe.

[0120] The performance of the sole of the present embodiment was tested, and the shape of the plate tested was the same as that shown in Figure 12 As shown in the figure, the thickness of the concave structure is the same as the thickness of other positions of the plate body:

[0121] The function verification index: under the condition that other factors are unchanged, the mechanical propulsion performance of the sole is evaluated by the support time and the flight time during the movement of wearing the sole. Generally, at the same speed, the shorter the support time, the less the active force time, indicating that it is more labor-saving. The better the mechanical propulsion performance, the faster the step frequency and the larger the step length.

[0122] Among them, the support time is the time from the foot touching the ground to the toe leaving the ground, and the flight time is the time from the toe leaving the ground to the other foot touching the ground. The units of the support time and the flight time are milliseconds.

[0123] The experimental data are as follows:

[0124] Experimental example 1: h = 13 mm, a = 17 mm.

[0125]

[0126] Experimental example 2: h = 5 mm, a = 13 mm.

[0127]

[0128] Experimental example 3: h = 30 mm, a = 35 mm.

[0129]

[0130] Example five

[0131] The shoe of the present embodiment has the sole of example four, which has the same advantages as described above. The shoe can be used as a shoe for running, skipping rope, basketball, etc., and the purpose of the shoe does not matter.

[0132] The shoe of this embodiment is an experimental example (the width S of the concave structure 2 is 100 mm, the maximum depth h is 13 mm, the width L of the concave portion 21 is 55 mm, and the thickness a of the midsole 4 is 17 mm; the shape of the plate tested is the same as that shown in Figure 12 The test results are as follows:

[0133] (1) Running

[0134] The average of 16 people was taken, and the total time of the marathon was reduced by 167.117 s at a running speed of 20 km / h.

[0135] The calculation is based on the following:

[0136]

[0137] The experimental data of the experimental example and the control example at different running speeds are as follows:

[0138]

[0139] Figures 25-27 The above table is a corresponding chart, and the above table and Figure 25 At medium speed, the experimental example has a single-step stride of 2 cm (0.76%) longer than the control example, and the above table and Figure 26 At high speed, the single-step time is reduced by 0.005 s (1.62%), and the above table and Figure 27 As the running speed increases, the experimental example has a lower support period ratio and a higher emptying period ratio, indicating that the test subject has a faster step frequency and a longer step length, and the same distance takes less time, and the experimental example has better propulsion performance.

[0140] (2) Basketball

[0141] The touch height test was conducted, and the experimental example had a single-foot jump of 2 cm and a double-foot jump of 4 cm higher than the control example.

[0142] (3) Long jump

[0143] The shoes of the experimental example and the control example were tested for standing long jump, and the dorsiflexion angle of the wearer's metatarsophalangeal joint was collected. The greater the dorsiflexion angle, the more negative work is done, indicating greater energy loss; the smaller the dorsiflexion angle, the less negative work is done, indicating less energy loss, indicating that the impact force is more effectively utilized.

[0144] According to the test, the experimental example had a dorsiflexion angle of 13.4°, and the control example had a dorsiflexion angle of 18.6°. That is, the experimental example can save 27.9% of energy.

[0145] The data is collected by a Vicon data collection system, and the jumping distance of the experimental example is improved by 5 cm compared with the control example.

[0146] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all of them are within the protection scope of the utility model.

Claims

1. A plate for a shoe sole, characterized in that, The plate body (1) is concave downward to form a concave structure (2) corresponding to the metatarsophalangeal joint area (12) of the foot, and the cross section of the concave structure (2) in the width direction of the foot comprises at least one arch-shaped opening upward.

2. The plate for a shoe sole according to claim 1, characterized in that, The curvature of the concave structure (2) gradually decreases from the middle part to the front and / or from the middle part to the back.

3. The plate for a shoe sole according to claim 1, characterized in that, The concave structure (2) extends to the toe bone area (11) of the plate body (1) completely or partially, and / or the concave structure (2) extends to the metatarsal bone area (13) of the plate body (1) completely or partially.

4. The plate for a shoe sole according to claim 1, characterized in that, The toe bone area (11) of the plate body (1) is tilted forward along the length direction of the foot.

5. The plate for a shoe sole according to claim 1, characterized in that, The concave structure (2) comprises a concave part (21) and wing support parts (22) extending outward from the inner and outer sides of the concave part (21) respectively.

6. The plate for a shoe sole according to claim 5, characterized in that, The wing support parts (22) gradually transition to be flat outward from the connection with the concave part (21).

7. The plate for a shoe sole according to claim 5, characterized in that, The width of the concave part (21) accounts for 45% to 90% of the width of the concave structure (2).

8. The plate for a shoe sole according to claim 1, characterized in that, The plate body (1) is provided with a stress release groove (3) corresponding to the forefoot area of the foot.

9. A shoe sole, characterized by The plate for the shoe sole according to any one of claims 1 to 8.

10. A shoe characterized by The shoe sole according to claim 9.

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