Shape memory alloy sports shoes

Abstract

The present invention provides a shape memory alloy sports shoe, comprising a connected upper and a sole. The sole is provided with an insole layer, a midsole layer, and an outsole layer from top to bottom. The midsole layer is provided with a midsole sole portion, a midsole arch portion, and a midsole heel portion from the toe to the heel. The outsole layer is provided with an outsole front portion and an outsole rear portion from the toe to the heel. An arch elastic pad is provided between the insole layer and the midsole arch portion, a midsole elastic pad is provided between the midsole sole portion and the outsole front portion, and a heel elastic pad is provided between the midsole heel portion and the outsole rear portion. The arch elastic pad, the midsole elastic pad, and the heel elastic pad are each provided with a matching first washer and a second washer from top to bottom. The shape memory alloy portion is provided inside the first washer and the second washer. The shape memory alloy sports shoe provided by the present invention can adaptively adjust the tightness of the upper, reduce leg fatigue during outdoor sports, correct flat feet, is not easily damaged, and has better durability.

Description

Technical Field

[0001] The invention belongs to the technical field of footwear and relates to a shape memory alloy sports shoe, in particular to a sports shoe with a built-in shape memory alloy for outdoor use. Background Art

[0002] As people's quality of life improves and their focus on health grows, outdoor sports are becoming increasingly popular. As an essential part of outdoor activities, athletic shoes have become a focus for manufacturers, with their functionality and design constantly being updated. However, existing athletic shoes still have some shortcomings. For example, after prolonged and repeated use, ordinary athletic shoes or air-cushioned shoes lose their elasticity and become stiff. Air-cushioned shoes can also leak.

[0003] During exercise, the soles of the feet are subjected to the reaction force of the ground. Ordinary shoes have no feedback measures, which may cause injuries to the legs and knees. At the same time, long-term outdoor exercise will bring a strong sense of fatigue to the athletes, especially flatfoot patients are more likely to feel tired than normal people.

[0004] When people walk, the force points of their feet vary from person to person. Some people have an inward center of gravity, while others have an outward center of gravity, which causes the shoes to become ill-fitting after a period of time. On the other hand, long-term outdoor exercise causes sports shoes to heat up, and the thermal expansion and contraction cause the shoe upper to become larger, affecting the sports experience during outdoor exercise. The enlargement of sports shoes may even cause dangers such as sprains.

[0005] Shape memory alloy (SMA) is a smart material with a unique shape memory effect and superelasticity, coupled with high mechanical properties. Superelasticity manifests itself when a shape memory alloy undergoes significant deformation in its high-temperature austenitic phase under external force. Upon removal of the external force, the deformation fully recovers, accompanied by the absorption and release of energy during the deformation process. The shape memory effect manifests itself when, after high-temperature treatment, the shape memory alloy can remember its austenitic form. After deformation in the martensitic phase under external conditions, heating induces a martensitic phase transformation, allowing the material to fully recover its original austenitic state, effectively enabling it to change shape with changes in temperature.

[0006] At present, shape memory alloys are mainly used in rehabilitation devices and actuators abroad, and there are few reports on their application in sports shoes and other multifunctional shoes. Summary of the Invention

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a shape memory alloy sports shoe that uses shape memory alloy components to adjust the tightness of the shoe upper, provide better rebound and cushioning, correct flat feet, and do not affect the walking of normal people.

[0008] To achieve the above-mentioned and other related purposes, the present invention provides a shape memory alloy sports shoe, comprising a connected upper and a sole, wherein the sole is provided with an insole layer, a midsole layer, and an outsole layer in sequence from top to bottom, the midsole layer is provided with a midsole sole portion, a midsole arch portion, and a midsole heel portion in sequence from the toe to the tail, the outsole layer is provided with an outsole front portion and an outsole rear portion in sequence from the toe to the tail, an arch elastic pad is provided between the insole layer and the midsole arch portion, the midsole sole portion matches the outsole front portion and a sole elastic pad is provided therebetween, the midsole heel portion matches the outsole rear portion and a heel elastic pad is provided therebetween, the arch elastic pad, the sole elastic pad, and the heel elastic pad are all provided with a matching first washer and a second washer in sequence from top to bottom, and the area surrounded by the first washer and the second washer is hollow and provided with a shape memory alloy portion therein.

[0009] Preferably, the shoe upper is woven from a woven material containing shape memory alloy wires.

[0010] More preferably, the braided material comprising shape memory alloy wire is selected from one of shape memory alloy wire and a mixed wire of shape memory alloy wire and ultrafine fiber.

[0011] Preferably, a shoe guard is provided on the heel portion of the shoe upper.

[0012] Preferably, a support plate is attached to the outer surface of the midsole arch portion.

[0013] Preferably, the contact surfaces of the front and rear parts of the outsole are provided with a plurality of anti-slip grooves.

[0014] Preferably, the first gasket and the second gasket are both annular, the annular portion of the first gasket is provided with a first gasket groove opening downward, the annular portion of the second gasket is provided with a second gasket groove opening upward, the first gasket groove and the second gasket groove match to form an annular hollow cavity.

[0015] More preferably, the shape memory alloy portion is disposed in an annular hollow cavity formed by the first gasket groove and the second gasket groove.

[0016] Preferably, the shape memory alloy part is provided with a plurality of shape memory alloy layers in sequence from the inside to the outside along the radial direction, and one of the shape memory alloy layers includes a plurality of shape memory alloy rings, which are rings formed by shape memory alloy wires with sinusoidal waveforms. In one of the shape memory alloy layers, the plurality of shape memory alloy rings are stacked layer by layer from the inside to the outside along the radial direction of the shape memory alloy part.

[0017] More preferably, in the same shape memory alloy layer, the shape memory alloy rings of the outer layer are circumferentially offset relative to the shape memory alloy rings of the adjacent inner layer, and the circumferential offset directions of the adjacent shape memory alloy rings are consistent.

[0018] Further preferably, when the shape memory alloy layer includes n shape memory alloy rings, the circumferential offset distance of the shape memory alloy rings of the outer layer relative to the shape memory alloy rings of the adjacent inner layer is 1 / n-1 sinusoidal periods, where n is a positive integer and n≥2.

[0019] Most preferably, when the shape memory alloy layer includes 10 shape memory alloy rings, the circumferential offset distance d of the shape memory alloy rings in the outer layer relative to the shape memory alloy rings in the adjacent inner layer is 1 / 9 of a sine cycle.

[0020] More preferably, the diameter of the shape memory alloy wire is 20-25 μm.

[0021] More preferably, in the sinusoidal shape memory alloy wire, the vertical distance between adjacent wave crests and wave troughs is 15-20 mm.

[0022] More preferably, the shape memory alloy portion in the arch elastic pad or the heel elastic pad includes 8-12 shape memory alloy layers.

[0023] More preferably, the shape memory alloy portion in the sole elastic pad includes 13-17 shape memory alloy layers.

[0024] As described above, the shape memory alloy sports shoes provided by the present invention have the following beneficial effects:

[0025] (1) The present invention provides a shape memory alloy sports shoe, the upper of which is woven from shape memory alloy wire. The shape memory alloy has a shape memory effect and can undergo phase change according to changes in the external environment temperature and human body temperature, thereby achieving adaptive adjustment of the tightness of the upper, helping users to have the most comfortable wearing experience during exercise and be less likely to get injured.

[0026] (2) The present invention provides a shape memory alloy sports shoe, in which an arch elastic pad is provided between the insole layer and the arch part of the midsole, so that normal people will not be affected when walking, while flat foot patients will receive a certain rebound force at the arch when walking, which helps to correct flat feet.

[0027] (3) The present invention provides a shape memory alloy sports shoe, in which a sole elastic pad is provided between the sole portion of the midsole and the front portion of the outsole, and a heel elastic pad is provided between the heel portion of the midsole and the rear portion of the outsole. The shape memory alloy sports shoe provides power during exercise, has good shock absorption performance, and provides good rebound and cushioning, which can reduce the leg fatigue of people who exercise outdoors for a long time.

[0028] (4) The present invention provides a shape memory alloy sports shoe, wherein the shape memory alloy wires provided in the arch elastic pad, the sole elastic pad, and the heel elastic pad can absorb and release energy during the phase change process, thereby replacing a portion of the energy consumed by the body and reducing muscle fatigue.

[0029] (5) The present invention provides a shape memory alloy sports shoe, wherein the shape memory alloy wire provided in the arch elastic pad, the sole elastic pad, and the heel elastic pad can provide a larger and more stable rebound compared to ordinary foam materials and air cushions, and is not easy to be damaged, has better durability, and can provide longer-term reasonable support.

[0030] (6) The present invention provides a shape memory alloy sports shoe, wherein the arch elastic pad, the sole elastic pad, and the heel elastic pad are provided with elastic shape memory alloy wires, thereby making the shoe woven. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Shown is an exploded view of the overall structure of a shape memory alloy sports shoe according to the present invention.

[0032] Figure 2 Shown is a right side view of a shape memory alloy sports shoe according to the present invention.

[0033] Figure 3 Shown is an exploded view of the decomposed structure of an elastic memory alloy pad in a shape memory alloy sports shoe according to the present invention.

[0034] Figure 4 Shown is a morphological diagram of an elastic memory alloy pad in a shape memory alloy sports shoe according to the present invention.

[0035] Figure 5 Shown is a conceptual diagram of the internal structure of a shape memory alloy sports shoe upper according to the present invention.

[0036] Figure 6 Shown is a conceptual diagram of a shape memory alloy sports shoe according to the present invention.

[0037] Figure 7 Shown is a structural diagram of the midsole arch portion of a shape memory alloy sports shoe according to the present invention.

[0038] Figure 8Shown is a diagram of the stacked structure of shape memory alloy rings of a shape memory alloy sports shoe according to the present invention.

[0039] Figure 9 The graph shows the change in deformation of the shape memory alloy wire in the shape memory alloy sports shoe according to the present invention as a function of temperature.

[0040] Reference numerals

[0041] 1 Upper

[0042] 11. Shoe guard

[0043] 2. Sole

[0044] 21 Outer bottom layer

[0045] 21a Front of outsole

[0046] 21b rear outsole

[0047] 22 Middle and lower levels

[0048] 22a Midsole

[0049] 22b midsole arch

[0050] 22c midsole heel

[0051] 23a Elastic pad on the sole of the foot

[0052] 23b Arch Elastic Pad

[0053] 23c heel elastic pad

[0054] 231 Shape Memory Alloy Department

[0055] 231a Shape memory alloy ring

[0056] 232 First Washer

[0057] 232a First gasket groove

[0058] 233 Second washer

[0059] 233a Second gasket groove

[0060] 24 insole layer

[0061] 25 anti-slip grooves

[0062] 26 Support Plate

[0063] d offset distance DETAILED DESCRIPTION

[0064] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0065] See also Figures 1 to 9 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0066] The present invention provides a shape memory alloy sports shoe, such as Figure 1 As shown, the shoe comprises a connected upper 1 and a sole 2, wherein the sole 2 is provided with an insole layer 24, a midsole layer 22, and an outer bottom layer 21 in order from top to bottom, wherein the midsole layer 22 is provided with a midsole sole portion 22a, a midsole arch portion 22b, and a midsole heel portion 22c in order from the toe to the heel, and the outer bottom layer 21 is provided with an outsole front portion 21a and an outsole rear portion 21b in order from the toe to the heel, an arch elastic pad 23b is provided between the insole layer 24 and the midsole arch portion 22b, and the midsole sole portion 22c is provided. 22a matches the front part of the outsole 21a and a sole elastic pad 23a is provided between the two. The midsole heel part 22a matches the rear part of the outsole 21b and a heel elastic pad 23c is provided between the two. The arch elastic pad 23b, the sole elastic pad 23a, and the heel elastic pad 23c are all provided with matching first washers 232 and second washers 233 from top to bottom. The area surrounded by the first washer 232 and the second washer 233 is hollow and has a shape memory alloy part 231 inside.

[0067] In a preferred embodiment, the sole 2 and the upper 1 are connected by bonding or sewing.

[0068] In a preferred embodiment, Figure 5 、 6 As shown, the upper 1 is woven from a woven material containing shape memory alloy wires. The upper 1 has deformability due to the shape memory alloy wires and can adaptively adjust its size according to the external environment temperature and the temperature of the human foot to achieve the tightness of the shoe.

[0069] In a further preferred embodiment, Figure 5 、 6 As shown, the braided material containing shape memory alloy wire is selected from one of shape memory alloy wire or a mixed wire of shape memory alloy wire and ultrafine fiber.

[0070] like Figure 5 As shown, when the shape memory alloy wires are used to weave the shoe upper 1, the shape memory alloy wires are interwoven with each other to form a mesh surface composed of multiple irregular polygons.

[0071] These ultrafine fibers are also known as microfibers, fine denier fibers, and ultrafine fibers. Generally, fibers with a fineness of 0.3 denier (5 microns in diameter) or less are considered ultrafine fibers. Ultrafine fibers are primarily composed of polyester and nylon (with formulations ranging from 80% polyester and 20% nylon to 100% polyester).

[0072] In a preferred embodiment, the insole layer 24 is made of silica gel.

[0073] The insole layer 24 is in direct contact with the foot. For people who do outdoor sports, they need to walk for a long time, and the silicone product has good elasticity and can slow down the cushioning of the sole 2 on the sole during exercise, reducing the soreness of the sole caused by long-term outdoor walking.

[0074] In a preferred embodiment, Figure 1 、 2 As shown, the heel portion of the upper 1 is provided with a shoe guard 11. The shoe guard 11 is made of leather and can protect the heel.

[0075] In a preferred embodiment, the mid-bottom layer 22 is made of EVA, which is relatively soft and can effectively wrap the arch elastic pad 23b, the sole elastic pad 23a, and the heel elastic pad 23c.

[0076] In a preferred embodiment, the streamlined shapes of the midsole sole portion 22a and the midsole heel portion 22c of the midsole 22 are in the form of cloud patterns, which draw inspiration from the ancient Chinese "cloud pattern" and have the meaning of "stepping on clouds", which is beautiful and elegant.

[0077] In a preferred embodiment, Figure 7 As shown, a support plate 26 is attached to the outer surface of the midsole arch portion 22b. The support plate 26 is made of carbon fiber. The carbon fiber has high hardness and can provide effective support and protection.

[0078] In a preferred embodiment, the outer bottom layer 21 is made of natural rubber, which provides friction and is wear-resistant. The outer bottom layer 21 directly contacts the bottom surface.

[0079] In a preferred embodiment, Figure 1 、 2 As shown, the contact surfaces of the outsole front portion 21a and the outsole rear portion 21b are provided with a plurality of anti-skid grooves 25. The contact surface of the outsole 21 of the shoe sole 2 is formed into an alternating concave-convex shape, which can increase friction and resist wear.

[0080] The midsole sole portion 22a matches the outsole front portion 21a in that they are in close contact with each other in shape. The midsole heel portion 22c matches the outsole rear portion 21b in that they are in close contact with each other in shape.

[0081] like Figure 4 As shown, the shapes of the arch elastic pad 23b, the sole elastic pad 23a, and the heel elastic pad 23c are designed according to the shape of the human foot sole and fit the basic shape of the foot sole.

[0082] In a preferred embodiment, the first gasket 232 and the second gasket 233 are both made of rubber.

[0083] In a preferred embodiment, Figure 3 As shown, the first gasket 232 and the second gasket 233 are both annular, the annular portion of the first gasket 232 is provided with a first gasket groove 232a opening downward, and the annular portion of the second gasket 233 is provided with a second gasket groove 233a opening upward, the first gasket groove 232a and the second gasket groove 233a match to form an annular hollow cavity.

[0084] In a further preferred embodiment, the shape memory alloy portion is disposed in an annular hollow cavity formed by the first gasket groove 232 a and the second gasket groove 233 a .

[0085] The matching of the first gasket groove 232a and the second gasket groove 233a means that the first gasket groove 232a with an opening downward and the second gasket groove 233a with an opening upward can form a closed and annular hollow cavity structure, thereby wrapping the shape memory alloy part 231 therein.

[0086] In a preferred embodiment, Figure 3As shown, the shape memory alloy portion 231 is provided with a plurality of shape memory alloy layers sequentially arranged radially from the inside to the outside. Each shape memory alloy layer includes a plurality of shape memory alloy rings 231a, each of which is formed by a sinusoidal shape memory alloy wire. Within each shape memory alloy layer, the plurality of shape memory alloy rings 231a are stacked radially from the inside to the outside of the shape memory alloy portion 231. When the shape memory alloy portion 231 moves, the superelasticity of the shape memory alloy rings 231a in the shape memory alloy layer provides a rebound force.

[0087] In a further preferred embodiment, Figure 8 As shown, in the same shape memory alloy layer, the shape memory alloy rings 231a of the outer layer are circumferentially offset relative to the shape memory alloy rings 231a of the adjacent inner layer, and the circumferential offset directions of the adjacent shape memory alloy rings 231a are consistent. The circumferential offset directions of the adjacent shape memory alloy rings 231a are consistent, which means that the adjacent shape memory alloy rings 231a are offset in the same circumferential direction, such as counterclockwise or clockwise.

[0088] More specifically, if Figure 8 As shown, when the shape memory alloy layer includes n shape memory alloy rings 231a, the circumferential offset distance d of the shape memory alloy rings 231a in the outer layer relative to the shape memory alloy rings 231a in the adjacent inner layer is 1 / n-1 sinusoidal periods, where n is a positive integer and n≥2. This ensures that the sinusoidal periods of the shape memory alloy rings 231a in the innermost layer and the sinusoidal periods of the shape memory alloy rings 231a in the outermost layer in the shape memory alloy layer overlap, forming a cycle.

[0089] For example, when the shape memory alloy layer includes 10 shape memory alloy rings 231 a , the circumferential offset distance d of the shape memory alloy rings 231 a in the outer layer relative to the shape memory alloy rings 231 a in the adjacent inner layer is 1 / 9 of a sine cycle.

[0090] In a further preferred embodiment, in the sinusoidal shape memory alloy wire, the vertical distance between adjacent wave crests and wave troughs is 15-20 mm.

[0091] In a further preferred embodiment, the shape memory alloy portion 231 in the arch elastic pad 23b and the heel elastic pad 23c includes 8-12 shape memory alloy layers, preferably 10 shape memory alloy layers, to ensure that the arch elastic pad 23b and the heel elastic pad 23c have very strong resilience.

[0092] In a further preferred embodiment, the shape memory alloy portion 231 in the sole elastic pad 23a includes 13-17 shape memory alloy layers, preferably 15 shape memory alloy layers, to ensure that the sole elastic pad 23a has a stronger resilience.

[0093] In a further preferred embodiment, the diameter of the shape memory alloy wire is 20-25 μm. This wire, drawn into shape by our team (Institute of Phase Transformation and Structure, Shanghai Jiao Tong University), is internationally leading and superior to the typical 50-200 μm diameter elastic shape memory alloy wire, making the shape memory alloy wire woven.

[0094] The arch elastic pad 23b, through the shape memory alloy wire in the shape memory alloy portion 231, can help flatfoot patients correct their flat feet during walking. The sole elastic pad 23a and heel elastic pad 23c, through the shape memory alloy wire in the shape memory alloy portion 231, can provide rebound force to the sole and heel during exercise.

[0095] Example 1

[0096] Shape memory alloy sports shoes are prepared for outdoor use. The upper 1 is woven from shape memory alloy wire, and a leather upper 11 is provided at the heel of the upper 1. The sole 2 is divided from top to bottom into an insole layer 24, a midsole layer 22, and an outer layer 21. The midsole sole 22a, midsole arch 22b, and midsole heel 22c of the midsole 22 are made of EVA material. The midsole sole 22a and midsole heel 22c are streamlined and have a cloud pattern. The outer surface of the midsole arch 22c is attached with a high-hardness carbon fiber support plate. The outsole front 21a and outsole rear 21b of the outer layer 21 are made of natural rubber. The contact surfaces of the outsole front 21a and the outsole rear 21b are provided with multiple anti-skid grooves 26, forming alternating concave and convex anti-skid patterns on the side surfaces of the outer layer 21 of the sole 2. Then, an arch elastic pad 23b is set between the silicone insole layer 24 and the midsole arch part 22b, a sole elastic pad 23a is set between the midsole sole part 22a and the outsole front part 21a, and a heel elastic pad 23c is set between the midsole heel part 22c and the outsole rear part 21b. The arch elastic pad 23b, the sole elastic pad 23a, and the heel elastic pad 23c are all provided with a first washer 232 and a second washer 233 from top to bottom. The first washer 232 and the second washer 233 are both annular. The annular portion of the first washer 232 is provided with a first gasket groove 232a opening downward, and the annular portion of the second gasket 233 is provided with a second gasket groove 233a opening upward. The first gasket groove 232a and the second gasket groove 233a form a hollow annular cavity. The shape memory alloy portion 231 is provided in the hollow annular cavity formed by the first gasket groove 232a and the second gasket groove 233a. The material of the first gasket 232a and the second gasket 233a is rubber. The shape memory alloy portion 231 located in different elastic pads is radially arranged with several shape memory alloy layers from the inside out. Each shape memory alloy layer includes 10 shape memory alloy rings 231a, each formed by a sinusoidal shape memory alloy wire. Within each shape memory alloy layer, the 10 shape memory alloy rings 231a are stacked radially from the inside out of the shape memory alloy portion 231. Within the same shape memory alloy layer, the shape memory alloy rings 231a of the outer layer are circumferentially offset relative to the shape memory alloy rings 231a of the adjacent inner layer, and the circumferential offset direction of the shape memory alloy rings 231a is consistent. The circumferential offset distance d between the outer shape-memory alloy ring 231a and the adjacent inner shape-memory alloy ring 231a is 1 / 9 of a sinusoidal period. This ensures that when the shape-memory alloy layer includes ten shape-memory alloy rings 231a, the sinusoidal period of the innermost shape-memory alloy ring 231a coincides with the sinusoidal period of the outermost shape-memory alloy ring 231a, forming a cycle. In the arch elastic pad 23b and the heel elastic pad 23c, the shape-memory alloy portion 231 comprises ten shape-memory alloy layers.In the sole elastic pad 23 a , the shape memory alloy portion 231 includes 15 shape memory alloy layers.

[0097] Example 2

[0098] When a user wears the shape-memory alloy sports shoes prepared in Example 1 and exercises outdoors, the torso naturally leans forward, and the soles of the feet become the primary force generating point. Therefore, a certain amount of elasticity and friction is required at the soles of the feet. Because the outsole front portion 21a of the outsole layer 21, where the soles of the feet are located, is made of natural rubber, it provides strong friction and enhances grip. Furthermore, the shape-memory alloy wires in the shape-memory alloy portion 231 of the elastic sole pad 23a, located between the midsole sole portion 22a and the outsole front portion 21a, can rebound when subjected to pressure, providing a counteracting force and thus providing power.

[0099] During exercise, the sole of the foot typically pushes off, with the heel landing first. Because the rear portion 21b of the outsole 21, where the heel is located, is made of natural rubber, it provides strong friction and enhances grip. Furthermore, the heel spring pad 23c, located between the midsole heel portion 22c and the rear portion 21b of the outsole, includes a shape-memory alloy ring 231a in its shape-memory alloy portion 231, which generates a rebound force that acts as a cushion and protects the leg.

[0100] In addition, the arch elastic pad 23b arranged between the insole layer 24 and the midsole arch portion 22b has a shape memory alloy ring 231a in the shape memory alloy portion 231. Normal people will not be affected when walking, but flatfoot patients will be subjected to a certain rebound force at the arch of the foot when walking. The generated rebound force can help flatfoot patients correct flat feet.

[0101] When the athlete exercises, the shape memory alloy ring 231a in the shape memory alloy part 231 of the arch elastic pad 23b, the sole elastic pad 23a, and the heel elastic pad 23c will induce martensite phase transformation when squeezed by external force, accompanied by energy absorption. At this time, part of the reaction force of the ground is absorbed, bringing a shock-absorbing effect and reducing the damage of the reaction force to the human leg; when the external force is removed, the austenite phase transformation eliminates martensite and restores the original shape, which is accompanied by energy release, providing a certain amount of energy for leg movement, reducing muscle movement energy consumption, and thus can alleviate the fatigue caused by long-term exercise.

[0102] When an athlete exercises, the temperature of the foot rises, causing the temperature of the upper loop 1 to rise accordingly. The shape memory alloy filaments that weave the upper 1 exhibit a shape memory effect, allowing them to undergo phase changes based on changes in ambient and human body temperature. When heated, the phase change causes the upper 1, woven from the shape memory alloy, to automatically adapt and conform to the foot. Specifically, when a person's foot heats up during exercise, the upper 1 automatically contracts due to the heat. When exercise stops, the temperature drops, and the upper 1 automatically loosens, achieving adaptive tightness adjustment.

[0103] Specific as Figure 9 As shown, the shape memory alloy sports shoes of the present invention use shape memory alloy wires that undergo a relatively obvious R-phase transition under 200Mpa stress conditions in the temperature range of 0-50°C (normal human body temperature is 36-37°C), and the deformation amount varies greatly with temperature, thereby enabling adaptive adjustment of the tightness of the shoe upper.

[0104] In summary, the shape memory alloy sports shoes provided by the present invention can adaptively adjust the tightness of the upper, reduce leg fatigue during outdoor exercise, correct flat feet, are resistant to damage, and have improved durability. Therefore, the present invention effectively overcomes the shortcomings of the existing technology and has high industrial application value.

[0105] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A shape memory alloy sports shoe comprising a connected upper (1) and a sole (2), characterized in that: The sole (2) is provided with an insole layer (24), a midsole layer (22), and an outer layer (21) in sequence from top to bottom; the midsole layer (22) is provided with a midsole sole portion (22a), a midsole arch portion (22b), and a midsole heel portion (22c) in sequence from the toe to the heel; the outer layer (21) is provided with an outer sole front portion (21a) and an outer sole rear portion (21b) in sequence from the toe to the heel; an arch elastic pad (23b) is provided between the insole layer (24) and the midsole arch portion (22b); the midsole sole portion (22a) and the outer sole front portion (21c) are provided. The midsole heel portion (22c) matches the outsole rear portion (21b) and a heel elastic pad (23c) is provided between the two. The arch elastic pad (23b), the sole elastic pad (23a), and the heel elastic pad (23b) are sequentially provided with a matching first washer (232) and a second washer (233) from top to bottom. The area enclosed by the first washer (232) and the second washer (233) is hollow and has a shape memory alloy portion (231) therein. The shoe upper (1) is woven from a woven material containing shape memory alloy wires; The first gasket (232) and the second gasket (233) are both annular, the annular portion of the first gasket (232) is provided with a first gasket groove (232a) opening downward, the annular portion of the second gasket (233) is provided with a second gasket groove (233a) opening upward, the first gasket groove (232a) and the second gasket groove (233a) matching to form an annular hollow cavity; the shape memory alloy portion (231) is provided in the annular hollow cavity formed by the first gasket groove (232a) and the second gasket groove (233a); The shape memory alloy portion (231) is provided with a plurality of shape memory alloy layers in sequence from the inside to the outside in the radial direction, one of the shape memory alloy layers includes a plurality of shape memory alloy rings (231a), and the shape memory alloy rings (231a) are rings formed by enclosing shape memory alloy wires in a sinusoidal waveform. In one of the shape memory alloy layers, the plurality of shape memory alloy rings (231a) are stacked layer by layer from the inside to the outside in the radial direction of the shape memory alloy portion (231); In the same shape memory alloy layer, the shape memory alloy ring (231a) of the outer layer is offset in the circumferential direction relative to the shape memory alloy ring (231a) of the adjacent inner layer, and the circumferential offset directions of the adjacent shape memory alloy rings (231a) are consistent; when the shape memory alloy layer includes n shape memory alloy rings (231a), the circumferential offset distance d of the shape memory alloy ring (231a) of the outer layer relative to the shape memory alloy ring (231a) of the adjacent inner layer is 1 / n-1 sinusoidal periods, where n is a positive integer and n≥2.

2. The shape memory alloy sports shoe according to claim 1, characterized in that: The heel portion of the shoe upper (1) is provided with a shoe upper guard (11).

3. The shape memory alloy sports shoe according to claim 1, characterized in that: A support plate (26) is attached to the outer surface of the midsole arch portion (22b).

4. The shape memory alloy sports shoe according to claim 1, characterized in that: The contact surfaces of the front portion (21a) and the rear portion (21b) of the outer sole are provided with a plurality of anti-slip grooves (25).

5. The shape memory alloy sports shoe according to claim 1, characterized in that: The diameter of the shape memory alloy wire is 20-25 μm.

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