Self-powered friction structure and insole

Abstract

The utility model discloses a self-powered friction structure and an insole. The self-powered friction structure comprises a negative electrode structure which comprises a first negative electrode material layer, a conductive fabric layer and a second negative electrode material layer which are connected in sequence, and the conductive fabric layer is located between the first negative electrode material layer and the second negative electrode material layer; the positive electrode structure comprises a positive electrode material layer and a base layer which are connected with each other; the plurality of elastic columns are uniformly distributed and are connected with the second negative electrode material layer and the positive electrode material layer to form a hollow structure; the first negative electrode material layer and the second negative electrode material layer adopt an electric polarity material different from that of the positive electrode material layer; the negative electrode structure, the elastic column and the positive electrode structure are integrally formed. According to the self-powered friction structure and the insole, the self-powered friction structure is integrally formed, has the advantages of being high in durability and stable in voltage output, can be conveniently cut at will, and meets the requirement for large-scale production.

Description

Technical Field

[0001] The utility model relates to the technical field of textiles, in particular to a self-powered friction structure and a shoe insole. Background Art

[0002] With the continuous improvement of living standards in modern society, people's expectations for clothing are no longer limited to its basic functions of keeping warm and covering up, but also pursue a sense of fashion and technology. In this context, luminous shoes, as a product that combines fashion and technology, have been favored by consumers. However, most of the luminous shoes on the market currently rely on traditional battery power supply methods, such as button batteries and rechargeable batteries, and the use of these batteries has obvious limitations. First, the service life of these batteries is relatively short and needs to be replaced frequently, which brings inconvenience to users. Secondly, the charging and replacement process of the battery may also cause damage to the shoes or performance degradation, further affecting the user's experience. Therefore, developing a new energy supply technology that can solve the power supply problem of luminous shoes has become an important research direction. As a new energy technology, the unique energy conversion mechanism of the friction nanogenerator (TENG) provides a new possibility for solving this problem. It can convert the mechanical energy generated by human movement into electrical energy, providing a continuous and stable power supply for low-power devices such as luminous shoes. In daily life, whether walking or running, people will generate a lot of mechanical energy, which can be used by friction nanogenerators. However, there are still some technical problems and challenges in the current friction power generation shoe body. First of all, although its working principle is basically clear, that is, the cover plate drives the support body and the spring to compress through human walking and stepping, and then squeezes the friction power generation part to generate current, but the overall structure is relatively complex, and it is difficult to achieve integrated design and large-scale preparation. Secondly, due to the large number of mechanical parts inside the shoe body, the stability is poor and it is easily affected by the external environment and use conditions, resulting in reduced fatigue resistance and shortened service life. Therefore, in order to give full play to the application potential of friction nanogenerators in wearable devices such as luminous shoes, it is necessary to further improve and optimize its structural design, improve the stability and durability of the equipment, and reduce production costs to achieve large-scale production and wide application. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and to provide a self-powered friction structure and insole. The self-powered friction structure realizes integrated molding and has the characteristics of high durability and stable voltage output. At the same time, it is convenient to cut it arbitrarily to meet the needs of large-scale production.

[0004] To achieve the above objectives, each embodiment of the present invention adopts the following technical solutions but is not limited to the following solutions:

[0005] The first technical scheme relates to a self-powered friction structure, comprising: a negative electrode structure, which comprises a first negative electrode material layer, a conductive fabric layer and a second negative electrode material layer connected in sequence, wherein the conductive fabric layer is located between the first negative electrode material layer and the second negative electrode material layer; a positive electrode structure, which comprises a positive electrode material layer and a base layer connected to each other; and a plurality of elastic columns, wherein the plurality of elastic columns are evenly distributed and connect the second negative electrode material layer and the positive electrode material layer to form a hollow structure to isolate the second negative electrode material layer and the positive electrode material layer; the first negative electrode material layer and the second negative electrode material layer use an electrode material different from that of the positive electrode material layer; the first negative electrode material layer is suitable for being pressed so that the second negative electrode material layer overcomes the elastic force of the elastic column and contacts the positive electrode material layer along a first direction to generate electric charge by friction; when the pressed pressure is less than the elastic force of the elastic column, the elastic column elastically recovers, and the first negative electrode material layer moves and separates relative to the positive electrode material layer along the extension direction of the first direction, generates voltage, and conducts through the conductive fabric layer to form current; the negative electrode structure, the elastic column and the positive electrode structure are integrally formed.

[0006] The second technical solution is based on the first technical solution, wherein the first negative electrode material layer and the second negative electrode material layer both use the same electronegative polymer material, and the positive electrode material layer uses surface-insulated conductive yarn or polymer material with positive charge.

[0007] The third technical solution is based on the second technical solution, wherein the material used for the first negative electrode material layer and the second negative electrode material layer is polydimethylsiloxane, barium titanate-doped polydimethylsiloxane, polytetrafluoroethylene, polyvinyl chloride or fluororubber.

[0008] The fourth technical solution is based on the first technical solution, wherein the conductive fabric layer is conductive fabric or conductive high polymer.

[0009] The fifth technical solution is based on the fourth technical solution, wherein the conductive fabric is one of knitted silver cloth, woven silver cloth or copper-nickel alloy cloth, and its thickness is 0.08 mm.

[0010] The sixth technical solution is based on the first technical solution, wherein the elastic column is a rubber tube made of rubber material.

[0011] The seventh technical solution is based on the first technical solution, wherein the base layer (8) is a hydrophobic layer made of a hydrophobic polymer material, and the thickness of the base layer (8) is 0.5 mm.

[0012] The eighth technical solution is based on the first technical solution, wherein the shape of the self-powered friction structure is one or a combination of U-type, O-type, and C-type.

[0013] The ninth technical solution is based on any one of the first to eighth technical solutions, wherein an insole comprises an insole body, and part or all of the insole body is made of the above-mentioned self-powered friction structure.

[0014] From the above description of the various embodiments of the present invention, it can be seen that, compared with the prior art, the various embodiments of the present invention have the following beneficial effects:

[0015] In the first technical solution and related embodiments, the self-powered friction structure integrates a negative electrode structure, a positive electrode structure and several elastic columns by an integrated molding method. Among them, the negative electrode structure includes a conductive fabric layer sandwiched between two layers of negative electrode material layers, and the positive electrode structure is composed of a positive electrode material layer and a base layer. The elastic columns are evenly distributed and connect the negative electrode material layer and the positive electrode material layer to form a hollow structure. When the structure is pressed by the outside, the negative electrode material layer can overcome the elastic force of the elastic column and generate electric charge by contact and friction with the positive electrode material layer. When the pressure decreases or disappears, the elastic column elastically recovers, so that the negative electrode material layer is separated from the positive electrode material layer, and the mechanical energy is converted into electrical energy in this process. The electrical energy is effectively conducted through the conductive fabric layer to provide power support for related equipment. This technology realizes the self-powered function and can provide stable power to the equipment without an external power supply. At the same time, the integrated molding design makes the structure more stable and improves its durability. In addition, the structure is convenient for arbitrary cutting, adapts to the needs of large-scale production, and provides an efficient and reliable energy supply solution for fields such as wearable devices.

[0016] In the second technical solution and related embodiments, the self-powered friction structure achieves efficient energy conversion by selecting electronegative polymer materials as the first negative electrode material layer and the second negative electrode material layer, and electrically positive surface-insulated conductive yarn or polymer materials as the positive electrode material layer. This material combination enables the structure to generate charge and electrical energy during the process of being pressed and separated, providing stable and reliable power support for wearable devices and the like. At the same time, the selected materials ensure the stability and durability of the structure, so that the self-powered friction structure has a longer service life and better performance in practical applications.

[0017] In the third technical solution and related embodiments, polydimethylsiloxane, barium titanate-doped polydimethylsiloxane, polytetrafluoroethylene, polyvinyl chloride or fluororubber are used as the materials of the first negative electrode material layer and the second negative electrode material layer, combined with the materials of the positive electrode material layer. These materials have good electrical properties and can ensure that they can effectively generate charge and electrical energy during external pressure and separation, providing stable and reliable power support for wearable devices or other electronic devices. At the same time, these materials also have high durability and stability, and can maintain their performance unchanged during long-term use, extending the service life of the self-powered friction structure. In addition, materials such as polydimethylsiloxane also have excellent chemical stability and biocompatibility, which enables this self-powered friction structure to work safely and stably in a variety of environments, expanding its scope of application.

[0018] In the fourth technical solution and related embodiments, conductive fabrics or conductive polymers are used as the conductive fabric layer. These conductive fabrics and conductive polymers have good conductivity, which can ensure that the generated electric energy is effectively conducted during the operation of the self-powered friction structure, and provide stable and reliable power support for related equipment. In addition, the conductive fabrics and conductive polymers also have certain flexibility and cuttability, which can adapt to the needs of self-powered friction structures of different shapes and sizes, and are convenient for large-scale production and application.

[0019] In the fifth technical solution and related embodiments, the conductive fabric layer is responsible for conducting the electric energy generated by the self-powered friction structure. In order to ensure its superior performance and controllable cost, the conductive fabric can be made of knitted silver cloth, woven silver cloth and copper-nickel alloy cloth, all of which have excellent conductivity and can efficiently transmit electric energy to the required location. At the same time, these materials also perform well in terms of washing resistance and comfort, ensuring stability in long-term use and the comfort of user experience. During the preparation process, the thickness of the conductive fabric layer not only ensures the stability of the conductive performance, but also realizes the thinness of the structure, thereby reducing the weight and volume of the entire self-powered friction structure. In addition, the thickness of the conductive fabric layer also directly affects the content of the negative electrode material layer in the overall structure, which can further regulate the electrical properties of the self-powered friction structure, such as key indicators such as output voltage, current and power, to meet the needs of different application scenarios.

[0020] In the sixth technical solution and related embodiments, a rubber tube made of rubber material is used as an elastic column. The rubber tube has good elasticity and resilience, can be deformed when pressed, and quickly return to its original shape after the pressure disappears. This enables the self-powered friction structure to smoothly achieve contact and separation between the negative electrode material layer and the positive electrode material layer when subjected to external pressure, thereby generating electrical energy. At the same time, the elasticity of the rubber tube also ensures the stability and durability of the structure, and can maintain good working performance for a long time.

[0021] In the seventh technical solution and related embodiments, the hydrophobic polymer material has good hydrophobic properties and can effectively prevent moisture from penetrating into the friction structure, thereby protecting the internal structure from the influence of a humid environment. This is crucial to ensure the stability and reliability of the self-powered friction structure, especially when used in an environment with high humidity. The thickness of the base layer is controlled to be 0.5 mm, which can achieve a light and thin structure while ensuring hydrophobic properties, and help reduce the weight and volume of the entire self-powered friction structure.

[0022] In the eighth technical solution and related embodiments, the design of various shapes enables the self-powered friction structure to adapt to different application scenarios and needs. U-type, O-type and C-type are all common structural shapes, which can be selected and combined according to actual needs to meet the requirements of various complex shapes and sizes. Structures of different shapes can adapt to different degrees of bending and twisting, so that the self-powered friction structure can better fit on wearable devices or other objects, improving energy conversion efficiency and comfort of use.

[0023] In the ninth technical solution and related embodiments, the self-powered friction structure is used to make the insole body, so that the energy self-sufficiency of the insole is achieved. The self-powered friction structure can effectively convert external pressure and separation into electrical energy, providing stable power support for the wearable device in the insole. This avoids the limitation that traditional insoles need to rely on external power supply, and improves the convenience and flexibility of use. Part or all of the insole body is made of a self-powered friction structure, and the forefoot part or the entire sole part of the insole can be made of a self-powered friction structure, which can be flexibly adjusted according to specific needs and application scenarios. This insole is made of integrated fabric, and the overall structure is tight and complete, without any mechanical parts. This makes the insole have good resilience, flexibility and plasticity, can fit different foot shapes, and provide a comfortable wearing experience. At the same time, its washability and stability are also very good. Even after multiple washings, it can still maintain its original shape and performance, ensuring long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the self-powered friction structure of the embodiment;

[0026] Figure 2 is a schematic diagram of an insole according to an embodiment;

[0027] Figure 3 A top view of an insole according to an embodiment;

[0028] Description of main reference numerals:

[0029] Negative electrode structure 1; positive electrode structure 2; elastic column 3; first negative electrode material layer 4; conductive fabric layer 5; second negative electrode material layer 6; positive electrode material layer 7; base layer 8. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0032] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0033] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0034] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0035] See also Figures 1 to 3 , Figure 1 and Figure 2 Schematic diagram of the self-powered friction structure is shown; Figure 1 As shown, a self-powered friction structure includes a negative electrode structure 1, a positive electrode structure 2 and an elastic column 3.

[0036] The negative electrode structure 1 comprises a first negative electrode material layer 4 , a conductive fabric layer 5 and a second negative electrode material layer 6 which are connected in sequence, and the conductive fabric layer 5 is located between the first negative electrode material layer 4 and the second negative electrode material layer 6 .

[0037] The first negative electrode material layer 4 and the second negative electrode material layer 6 both use the same electronegative polymer material. Specifically, the material used in the first negative electrode material layer 4 and the second negative electrode material layer 6 is polydimethylsiloxane, barium titanate-doped polydimethylsiloxane, polytetrafluoroethylene, polyvinyl chloride or fluororubber. In this embodiment, the first negative electrode material layer 4 and the second negative electrode material layer 6 use barium titanate-doped polydimethylsiloxane.

[0038] The conductive fabric layer 5 is a conductive fabric or a conductive polymer. Specifically, the conductive fabric layer 5 is a knitted silver fabric, a woven silver fabric or a copper-nickel alloy fabric, and its thickness is 0.08 mm. In this embodiment, the conductive fabric layer 5 is a copper-nickel alloy fabric with a resistance less than 0.3Ω.

[0039] In this embodiment, conductive fabric or conductive polymer is used as the conductive fabric layer 5. These conductive fabrics and conductive polymers have good conductivity, which can ensure that the generated electric energy is effectively conducted during the operation of the self-powered friction structure, and provide stable and reliable power support for related equipment. In addition, the conductive fabric and conductive polymer also have certain flexibility and cuttability, which can meet the needs of self-powered friction structures of different shapes and sizes, and are convenient for large-scale production and application.

[0040] In this embodiment, the conductive fabric layer 5 is responsible for conducting the electric energy generated by the self-powered friction structure. In order to ensure its superior performance and controllable cost, the conductive fabric can be made of knitted silver cloth, woven silver cloth and copper-nickel alloy cloth and other materials, all of which have excellent conductivity and can efficiently transmit electric energy to the desired location. At the same time, these materials also perform well in terms of washing resistance and comfort, ensuring stability in long-term use and the comfort of user experience. During the preparation process, the thickness of the conductive fabric layer 5 not only ensures the stability of the conductive performance, but also realizes the lightness and thinness of the structure, thereby reducing the weight and volume of the entire self-powered friction structure. In addition, the thickness of the conductive fabric layer 5 also directly affects the content of the negative electrode material layer in the overall structure, which can further regulate the electrical properties of the self-powered friction structure, such as key indicators such as output voltage, current and power, to meet the needs of different application scenarios.

[0041] The positive electrode structure 2 includes a positive electrode material layer 7 and a base layer 8 connected to each other.

[0042] The positive electrode material layer 7 is made of electrically positive surface-insulated conductive yarn or high molecular polymer material. The first negative electrode material layer 4 and the second negative electrode material layer 6 use different electrode polarity materials from the positive electrode material layer 7. Specifically, the material used in the positive electrode material layer 7 is silver cloth, copper-nickel alloy cloth or high molecular polymer material.

[0043] In this embodiment, the self-powered friction structure achieves efficient energy conversion by selecting electronegative polymer materials as the first negative electrode material layer 4 and the second negative electrode material layer 6, and electrically positive surface-insulated conductive yarn or polymer materials as the positive electrode material layer 7. This material combination enables the structure to generate charge and electrical energy during the pressing and separation process, providing stable and reliable power support for wearable devices and the like. At the same time, the selected materials ensure the stability and durability of the structure, so that the self-powered friction structure has a longer service life and better performance in practical applications.

[0044] The base layer 8 is a hydrophobic layer made of a hydrophobic polymer material, and the thickness of the base layer 8 is 0.5 mm. In this embodiment, the base layer is a hydrophobic layer formed by thermal curing of a PDMS solution.

[0045] In this embodiment, the hydrophobic layer formed by thermal curing of the PDMS solution has good hydrophobic properties, which can effectively prevent moisture from penetrating into the friction structure, thereby protecting the internal structure from the influence of a humid environment. This is crucial to ensure the stability and reliability of the self-powered friction structure, especially when used in an environment with high humidity. The thickness of the base layer 8 is controlled to be 0.5 mm, which can achieve a thin and light structure while ensuring hydrophobic properties, and help reduce the weight and volume of the entire self-powered friction structure.

[0046] Elastic column 3, such as Figures 1 to 3 As shown, there are several elastic columns 3, which are evenly distributed at equal intervals and connect the second negative electrode material layer 6 and the positive electrode material layer 7 to form a hollow structure to isolate the second negative electrode material layer 6 and the positive electrode material layer 7. Specifically, the elastic column 3 is a rubber tube made of rubber material. In this embodiment, a rubber tube made of rubber material is used as the elastic column 3. The rubber tube has good elasticity and resilience, can be deformed when pressed, and quickly returns to its original state after the pressure disappears. This enables the self-powered friction structure to smoothly achieve contact and separation between the negative electrode material layer and the positive electrode material layer 7 when subjected to external pressure, thereby generating electrical energy. At the same time, the elasticity of the rubber tube also ensures the stability and durability of the structure, and can maintain good working performance for a long time.

[0047] The negative electrode structure 1, the elastic column 3 and the positive electrode structure 2 are integrally formed. The shape of the self-powered friction structure is one or more combinations of U-type, O-type and C-type. In this embodiment, the design of various shapes enables the self-powered friction structure to adapt to different application scenarios and needs. U-type, O-type and C-type are all common structural shapes, which can be selected and combined according to actual needs to meet the requirements of various complex shapes and sizes. Structures of different shapes can adapt to different degrees of bending and twisting, so that the self-powered friction structure can better fit on wearable devices or other objects, improving energy conversion efficiency and comfort of use. In this embodiment, an O-type structure is adopted, which has good sealing and compression resistance, and can maintain the stability of the structure when subjected to external pressure.

[0048] The following is the working principle of the self-powered friction structure:

[0049] The first negative electrode material layer 4 is suitable for being pressed so that the second negative electrode material layer 6 overcomes the elastic force of the elastic column 3 and contacts the positive electrode material layer 7 along the first direction to generate electric charge by friction; when the pressed pressure is less than the elastic force of the elastic column 3, the elastic column 3 elastically recovers, and the first negative electrode material layer 4 moves and separates relative to the positive electrode material layer 7 along the extension direction of the first direction, generating voltage, which is conducted through the conductive fabric layer 5 to form current.

[0050] In this embodiment, the self-powered friction structure integrates a negative electrode structure 1, a positive electrode structure 2 and several elastic columns 3 by an integrated molding method. Among them, the negative electrode structure 1 includes a conductive fabric layer 5 sandwiched between two layers of negative electrode material layers, and the positive electrode structure 2 is composed of a positive electrode material layer 7 and a base layer 8. The elastic columns 3 are evenly distributed and connect the negative electrode material layer and the positive electrode material layer 7 to form a hollow structure. When the structure is pressed by the outside, the negative electrode material layer can overcome the elastic force of the elastic column 3 and generate electric charge by contacting and rubbing with the positive electrode material layer 7. When the pressure is reduced or disappears, the elastic column 3 elastically recovers, so that the negative electrode material layer is separated from the positive electrode material layer 7, and the mechanical energy is converted into electrical energy in this process. The electrical energy is effectively conducted through the conductive fabric layer 5 to provide power support for related equipment. This technology realizes the self-powered function and can provide stable power to the equipment without an external power supply. At the same time, the integrated molding design makes the structure more stable and improves its durability. In addition, the structure is convenient for arbitrary cutting, adapts to the needs of large-scale production, and provides an efficient and reliable energy supply solution for fields such as wearable devices.

[0051] A kind of insole, characterized in that it includes an insole body, and part or all of the insole body is made of the above-mentioned self-powered friction structure. If only part of this structure is used, then this part is usually placed in the forefoot part of the insole, and is tightly combined with other parts of the insole by sewing or pasting, so as to form a complete insole. In this embodiment, the insole body is made of the self-powered friction structure, so that the energy self-sufficiency of the insole is achieved. The self-powered friction structure can effectively convert external pressure and separation into electrical energy, and provide stable power support for the wearable device in the insole. This avoids the limitation that traditional insoles need to rely on external power supply, and improves the convenience and flexibility of use. Part or all of the insole body is made of the self-powered friction structure, and the forefoot part or the entire sole part of the insole can be made of the self-powered friction structure, and it can be flexibly adjusted according to specific needs and application scenarios. This insole is made of integrated fabric, the overall structure is tight and complete, and does not contain any mechanical parts. This makes the insole have good resilience, flexibility and plasticity, can fit different foot shapes, and provide a comfortable wearing experience. At the same time, its washability and stability are also very good. Even after multiple washings, it can still maintain its original shape and performance, ensuring long-term use effect. Under the condition of frequency 2Hz, the voltage and current of the insole of this embodiment remain stable after being pressed 100,000 times.

[0052] The present application provides a self-powered friction structure and an insole. The self-powered friction structure is formed in an integrated manner and has the characteristics of high durability and stable voltage output. It is also convenient to cut at will and can meet the needs of large-scale production.

[0053] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A self-powered friction structure, characterized in that: include: A negative electrode structure (1), comprising a first negative electrode material layer (4), a conductive fabric layer (5) and a second negative electrode material layer (6) connected in sequence, wherein the conductive fabric layer (5) is located between the first negative electrode material layer (4) and the second negative electrode material layer (6); A positive electrode structure (2), comprising a positive electrode material layer (7) and a base layer (8) connected to each other; and A plurality of elastic columns (3), wherein the plurality of elastic columns (3) are evenly distributed and connect the second negative electrode material layer (6) and the positive electrode material layer (7) to form a hollow structure, so as to separate the second negative electrode material layer (6) and the positive electrode material layer (7); The first negative electrode material layer (4) and the second negative electrode material layer (6) are made of different electrode polarity materials from the positive electrode material layer (7); The first negative electrode material layer (4) is suitable for being pressed so that the second negative electrode material layer (6) overcomes the elastic force of the elastic column (3) and contacts the positive electrode material layer (7) along a first direction to generate electric charge by friction; when the pressing pressure is less than the elastic force of the elastic column (3), the elastic column (3) elastically recovers, and the first negative electrode material layer (4) moves and separates relative to the positive electrode material layer (7) along the extension direction of the first direction, generating a voltage, which is conducted through the conductive fabric layer (5) to form an electric current; The negative electrode structure (1), the elastic column (3) and the positive electrode structure (2) are integrally formed.

2. A self-powered friction structure as claimed in claim 1, characterized in that: The first negative electrode material layer (4) and the second negative electrode material layer (6) are both made of the same electronegative high molecular polymer material, while the positive electrode material layer (7) is made of surface-insulated conductive yarn or high molecular polymer material with positive electroactivity.

3. A self-powered friction structure as claimed in claim 2, characterized in that: The material used for the first negative electrode material layer (4) and the second negative electrode material layer (6) is one of polydimethylsiloxane, barium titanate-doped polydimethylsiloxane, polytetrafluoroethylene, polyvinyl chloride or fluororubber.

4. A self-powered friction structure as claimed in claim 1, characterized in that: The conductive fabric layer (5) is conductive fabric or conductive high polymer.

5. A self-powered friction structure as claimed in claim 4, characterized in that: The conductive fabric is one of knitted silver cloth, woven silver cloth or copper-nickel alloy cloth, and has a thickness of 0.08 mm.

6. A self-powered friction structure as claimed in claim 1, characterized in that: The elastic column (3) is a rubber tube made of rubber material.

7. A self-powered friction structure as claimed in claim 1, characterized in that: The base layer (8) is a hydrophobic layer made of a hydrophobic polymer material, and the thickness of the base layer (8) is 0.5 mm.

8. A self-powered friction structure as claimed in claim 1, characterized in that: The self-powered friction structure has a shape of U-shape, O-shape, C-shape or a combination of multiple shapes.

9. A shoe insole, characterized in that: It comprises an insole body, part or all of which is made of a self-powered friction structure as described in any one of claims 1 to 8.

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