Sneaker capable of automatically adjusting hardness

Abstract

The invention provides a sports shoe capable of automatically adjusting hardness, which comprises a shoe shell and a sole, and the sole is made of elastic rubber; the shoe is characterized in that a friction assembly is arranged in the heel of the sole; the friction assembly comprises at least one pair of friction bodies capable of relatively and vertically displacing, the pair of friction bodies are provided with friction surfaces which can be attached to each other, and the friction surfaces generate heat through friction in the relative vertical displacement process; a thermosensitive part in heat conduction contact with the friction assembly is further arranged at the heel of the shoe sole, and the vertical elasticity of the thermosensitive part at the relatively high temperature is higher than that at the relatively low temperature. In the sports process, the hardness of the sports shoes can be automatically adjusted according to the intensity of sports.

Description

Technical Field

[0001] The present invention relates to the field of shoes and clothing, and particularly to a sports shoe. Background Art

[0002] A sports shoe generally has a sole made of soft rubber, which can provide good elastic cushioning for the human legs and feet during exercise. However, due to different degrees of exercise intensity, the requirements for the softness and hardness of the sole are also different. For example, when the intensity is high and the bouncing frequency is high, a softer sole is needed; when the intensity is low, a slightly harder sole is more comfortable than an overly soft one. Moreover, the soft rubber of the softer sole has a shorter deformation life (i.e., the functional life of reciprocating rebound) due to frequent large-amplitude reciprocating compression. In cases where sufficient cushioning is not required, a harder sole has a longer deformation life. Therefore, for an ideal sports shoe, its sole should be in a softer state during intense exercise and in a slightly harder state under normal conditions.

[0003] In view of the above situation, the sole of an ideal sports shoe should be adjustable in softness and hardness. In this regard, in the patent application CN202121685986.2, a slipper with an adjustable softness and hardness of the insole has been proposed, which provides a technical concept for adjusting the softness and hardness of the sole: by controlling the exhaust speed of the airbag in the sole to achieve the adjustment of softness and hardness. However, its disadvantage is that it requires manual adjustment by adjusting the exhaust valve. On the one hand, it is difficult for people to remember to actively adjust the softness and hardness. On the other hand, during many sports processes, the intensity often changes. For example, during a ball game, when changing from a defensive state to an offensive state, it is almost impossible for the athlete to have the leisure time to squat down and adjust the softness and hardness of the sole. Similarly, several other patent applications related to the adjustment of the softness and hardness of the sole also have the problem of manual adjustment. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide a sports shoe with automatically adjustable softness and hardness, which can automatically adjust the softness and hardness according to the intensity of exercise during the exercise process.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the sports shoe with automatically adjustable softness and hardness includes a shoe shell and a sole; the sole is made of elastic rubber, and a friction component is arranged inside the heel of the sole; the friction component includes at least a pair of friction bodies that can move vertically relative to each other, and the pair of friction bodies has friction surfaces that can be mutually attached, and heat is generated by friction during the relative vertical displacement of the friction surfaces; at the heel of the sole, a thermosensitive component in thermal conductive contact with the friction component is also provided, and the vertical elasticity of the thermosensitive component at a relatively high temperature is higher than that at a relatively low temperature.

[0006] Preferably, the friction body includes metal pipe fittings sleeved with each other, and the sleeved surfaces of the metal pipe fittings are made into rough surfaces. Metals with both wear resistance and heat conductivity, such as stainless steel or copper alloy, are further preferably used.

[0007] Preferably, there are at least 4 pairs of the friction bodies, which are evenly distributed about the heel center of the shoe sole to provide stable support.

[0008] Preferably, the thermosensitive component is TPE surrounding the friction body, and its hardness decreases with the increase of temperature.

[0009] Preferably, the friction body is arranged in the cavity at the heel, and the thermosensitive component is composed of a shape memory alloy wire. The normal temperature form of the shape memory alloy wire is a tension spring when the temperature is lower than 25°C, and the high temperature form is a compression spring when the temperature is higher than 45°C.

[0010] Preferably, there are heat dissipation holes under the heel of the shoe sole to prevent excessive heat accumulation inside the heel.

[0011] The beneficial effect of the present invention is that during the movement of the sports shoes with automatically adjustable softness and hardness, due to different degrees of intense movement, the degree of friction of the friction assembly at the heel of the shoes also changes accordingly, resulting in real-time changes in the temperature near the friction assembly, so that the vertical elasticity of the nearby thermosensitive component changes in real time to achieve real-time adjustment of the softness and hardness of the heel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a top view schematic diagram of the first embodiment of the shoe sole of this sports shoe.

[0013] Figure 2 is a longitudinal sectional schematic diagram of the first embodiment of the shoe sole of this sports shoe.

[0014] Figure 3 is a schematic diagram of the second embodiment of the shoe sole of this sports shoe in a relatively soft state.

[0015] Figure 4 is a schematic diagram of the second embodiment of the shoe sole of this sports shoe in a relatively hard state.

[0016] Figure 5 is a temperature-hardness response curve graph of several thermoplastic elastomers. DETAILED DESCRIPTION OF THE INVENTION

[0017] Embodiment 1:

[0018] The sports shoes with automatically adjustable softness and hardness include a shoe shell and a shoe sole. For the convenience of description, only the shoe sole where the key points of the present invention are located will be described.

[0019] At Figure 1 , Figure 2In the first embodiment shown, the sole 1 is made of elastic rubber, and a friction assembly is provided inside the heel thereof; the friction assembly includes 4 pairs of friction bodies that can be displaced vertically relative to each other, and the friction bodies are evenly distributed about the center of the heel.

[0020] The friction body in the first embodiment includes metal pipe fittings 11 sleeved with each other, that is, it includes a section of inner pipe body and a section of outer pipe body sleeved on the outer periphery of the inner pipe body, so that the inner pipe body and the outer appearance body can slide relative to each other. The upper and lower ends of the metal pipe fittings 11 are fixed by fixing seats 111, such as metal circular panels, so that the inner and outer pipe bodies are not easily tilted during the sliding process. The sleeved surfaces of the inner pipe body and the outer pipe body, that is, the contact surfaces, are made into rough surfaces, so that a large amount of frictional heat is generated during the sliding process. Considering the durability and heat conduction performance of the friction assembly, it can be made of stainless steel or copper alloy, and the contact surface can be sanded.

[0021] Around the outer periphery of each metal pipe fitting 11, there is also a surrounding of TPE, that is, thermoplastic elastomer, whose hardness decreases with the increase of temperature. For specific reference, please refer to the Figure 5 temperature-hardness response curves of several thermoplastic elastomers shown. When the intensity of exercise is relatively low, the friction assembly generates less heat, which dissipates quickly, and the surrounding temperature is close to normal temperature, and the hardness of TPE is relatively high. When the intensity of exercise is relatively high, the friction assembly generates heat quickly, and the surrounding temperature rises rapidly, causing the hardness of TPE to decrease significantly, thereby improving the overall elasticity of the sole.

[0022] In addition, some heat dissipation holes 100 can be opened below the heel to prevent excessive heat from accumulating inside the heel.

[0023] During the movement of this sports shoe with automatically adjustable softness and hardness, due to the different intensities of exercise, the friction intensity of the friction assembly at the heel also changes accordingly, resulting in real-time changes in the temperature near the friction assembly, thereby causing real-time changes in the hardness of the nearby TPE to achieve real-time adjustment of the softness and hardness of the heel. Another thing worth mentioning is that since the main body of the sole 1 is made of rubber, the heat transfer performance is extremely weak, so that the heat generated by the friction assembly can accumulate locally to achieve elastic adjustment of the thermosensitive components.

[0024] Embodiment Two:

[0025] Figure 3 、 Figure 4 This is a schematic diagram of the second embodiment of the sole of this sports shoe. Different from the first embodiment, the friction body is arranged in the cavity 10 at the heel. The friction body can still be composed of metal pipe fittings 11, but the diameters of the inner and outer pipe bodies need to be larger to facilitate the setting of a thermosensitive component composed of memory metal wires 2, such as nickel-titanium alloy, inside the metal pipe fittings 11. The memory metal wire 2 returns to the first form when the temperature is lower than 25°C, that is, as Figure 4The shown extension spring changes to the second form when the temperature is higher than 45°C, that is, a compression spring as shown in Figure 3 . Thus, when at a high temperature, the cavity 10 expands upward, leaving more elastic compression space for the heel to improve the overall elasticity of the sole. In addition, according to the characteristics of the shape memory metal, when the temperature is between 25°C and 45°C, the form of the shape memory wire is between that of the extension spring and the compression spring, and the working length changes approximately linearly with the temperature. Therefore, the elastic compression space of the cavity 10 changes with the intensity of the movement.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sports shoe capable of automatically adjusting the softness and hardness, the sports shoe comprising a shoe shell and a sole, wherein the sole is made of elastic rubber; characterized in that: A friction assembly is provided inside the heel of the sole; the friction assembly includes at least one pair of friction bodies that can be relatively displaced vertically, and the pair of friction bodies have friction surfaces that can fit each other, and the friction surfaces generate heat by friction during the relative vertical displacement process; a thermosensitive component that is in thermal contact with the friction assembly is also provided at the heel of the sole, and the vertical elasticity of the thermosensitive component at a relatively high temperature is higher than that at a relatively low temperature.

2. The sports shoes capable of automatically adjusting softness and hardness according to claim 1, characterized in that: The heat-sensitive component is TPE surrounding the friction body, and its hardness decreases with increasing temperature.

3. The sports shoes capable of automatically adjusting softness and hardness according to claim 1, characterized in that: The friction body is arranged in a cavity (10) at the heel, and the heat-sensitive component is composed of a memory metal wire (2). The memory metal wire is a tension spring at room temperature below 25°C, and is a compression spring at high temperature above 45°C.

4. The sports shoe capable of automatically adjusting the softness and hardness according to claim 1, 2 or 3, characterized in that: The friction body comprises metal pipes (11) which are sleeved together, and the sleeved surfaces of the metal pipes (11) are made into rough surfaces.

5. The sports shoes capable of automatically adjusting softness and hardness according to claim 4, characterized in that: The metal pipe (11) is made of stainless steel or copper alloy.

6. The sports shoe capable of automatically adjusting softness and hardness according to claim 1, 2 or 3, characterized in that: The friction bodies include at least four pairs, which are evenly distributed about the heel center of the sole.

7. The sports shoes capable of automatically adjusting softness and hardness according to claim 1, characterized in that: A heat dissipation hole (100) is provided below the heel of the sole.

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