Superconductive particle and silica gel key

Abstract

The utility model discloses a superconductive particle and a silica gel button, and the superconductive particle comprises a plurality of layers of metal conductive nets which are arranged in a stacked manner. The multiple layers of metal conductive nets form a three-dimensional conductive network with uniform pore diameters; wherein the value range of the wire diameter of the metal conductive net is 10 [mu] m-200 [mu] m; in the first direction, the superconducting particles are provided with first surfaces and second surfaces which are opposite to each other, and the first surfaces and the second surfaces are uniformly provided with a plurality of metal contacts respectively; the first direction is perpendicular to the extension direction of the metal conductive net. The technical scheme of the utility model has the advantages of uniform contact distribution, large current resistance, irrelevance between contact resistance and contact pressure, low contact resistance, high switching current reliability, low cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of contact circuit board technology, and in particular to a superconducting particle and a silicone button. Background Technology

[0002] Silicone buttons are frequently used in the automotive industry, for example, in keyless start, emergency stop buttons, rearview mirror adjusters, window regulators, and multi-function steering wheels. Silicone buttons contain one or more superconducting particles, a type of electrical contact. These particles typically consist of a base adhesive layer and a metal contact surface connected to it. When pressed, the superconducting particles contact the PCB (PCB board), causing the corresponding circuitry on the PCB to conduct. Therefore, the electrical performance and conductivity stability of the superconducting particles are crucial.

[0003] However, traditional conductive black particles use carbon silicone material for conductivity, which often has high contact resistance. Furthermore, because this contact resistance is pressure-dependent, even a slight press on the button can result in extremely high switching resistance. To address these shortcomings, planar gold particles subsequently emerged. However, these particles are costly, have inconsistent surface contact points, and their number and size are uncontrollable, leading to poor conductivity in extreme cases. Most also only have a metal contact surface on one side, preventing double-sided conductivity. Therefore, when assembling superconducting particles onto electrical contact point function buttons, both sides need to be manually identified, resulting in low production efficiency. Additionally, the particles are prone to being installed incorrectly, rendering them unusable and severely impacting product yield and reliability. Utility Model Content

[0004] This invention provides a superconducting particle and a silicone button to solve the problems existing in the prior art, so that the superconducting particle and silicone button have the advantages of uniform contact distribution, high current resistance, contact resistance independent of contact pressure, low contact resistance, high switching current reliability and low cost.

[0005] In a first aspect, this utility model provides a superconducting particle, comprising:

[0006] A multi-layered metal conductive mesh; the multiple layers of the metal conductive mesh form a three-dimensional conductive network with uniform aperture;

[0007] The wire diameter of the metal conductive mesh ranges from 10μm to 200μm; along the first direction, the superconducting particles have opposing first and second surfaces, and the first and second surfaces are each uniformly provided with a plurality of metal contacts; the first direction is perpendicular to the extension direction of the metal conductive mesh.

[0008] Optionally, the superconducting particles further include: an elastomer material; the elastomer material completely fills the pores of the three-dimensional conductive network.

[0009] Optionally, the plurality of metal contacts are disposed on the metal conductive mesh of the first surface and the second surface.

[0010] Optionally, the height range of the metal contact along the first direction is 0.003mm-100mm.

[0011] Optionally, the diameter of the metal contact along the first surface or the second surface can be in the range of 1.5mm-10mm.

[0012] Optionally, the aperture of the three-dimensional conductive network can be in the range of 20μm-200μm.

[0013] Optionally, the shape of the holes in the three-dimensional conductive network includes at least one of circles and polygons.

[0014] Optionally, the superconducting particles are connected to the silicone switch in the form of contact sheets; the elastomer material is silicone.

[0015] Optionally, the metal conductive mesh is at least one of copper mesh, titanium mesh, or copper alloy mesh.

[0016] Secondly, this utility model provides a silicone button, including a silicone switch and the superconducting particles described in any of the above-mentioned embodiments.

[0017] The technical solution of this utility model includes a superconducting particle comprising a multilayered metal conductive mesh, which forms a three-dimensional conductive network with uniform pore size. Multiple metal contacts are provided on the first and second surfaces of the superconducting particle, resulting in low contact resistance that is independent of contact pressure. This also allows electrical conductivity between the multilayered metal conductive meshes, thereby improving the reliability of the superconducting particle's switching function. Furthermore, the uniformity of the metal contacts ensures reliable contact between the superconducting particle and the circuit even when oxidation or dust contamination is present on the first or second surface, demonstrating good conductivity. Simultaneously, setting the wire diameter of the metal conductive mesh within the range of 10μm-200μm stabilizes the structure of the superconducting particle and effectively disperses the instantaneous large current when the superconducting particle contacts the circuit, thus making the superconducting particle more current-resistant.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A top view of a superconducting particle provided for an embodiment of this utility model;

[0021] Figure 2 A cross-sectional view of a superconducting particle provided for an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a silicone button provided in this embodiment. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0025] This embodiment provides a superconducting particle. Figure 1 This is a top view of a superconducting particle provided in an embodiment of the present invention. Figure 2 A cross-sectional view of a superconducting particle provided for an embodiment of this utility model, with reference to... Figure 1 and Figure 2 As shown, the superconducting particle 100 includes: a multilayer metal conductive mesh 1 stacked together, the multilayer metal conductive mesh 1 forming a three-dimensional conductive network with uniform pore size. The wire diameter of the metal conductive mesh 1 ranges from 10μm to 200μm; along the first direction L1 ( Figure 1 (in the direction perpendicular to the paper), the superconducting particles have a first surface and a second surface, and the first surface and the second surface are respectively provided with a plurality of metal contacts 11.

[0026] Wherein, the first direction L1 is perpendicular to the extension direction of the metal conductive mesh 1.

[0027] The metal conductive mesh 1 is used to make the corresponding circuit conductive when it comes into contact with the circuit on the PCB. The stacked multilayer metal conductive meshes 1 form a three-dimensional conductive network with uniform apertures, such as a honeycomb interconnected structure, allowing electrical connection between adjacent layers of metal conductive mesh 1. Therefore, when the metal conductive mesh 1 in contact with the circuit on the PCB is oxidized or contaminated and cannot conduct electricity, electrical connection with adjacent conductive layers can prevent the superconducting particles from failing, thereby improving the reliability of the superconducting particles. In an optional embodiment, the upper and lower surfaces of the metal conductive mesh 1, i.e., the two surfaces opposite each other along the first direction L1, are also provided with multiple metal contacts 11, allowing electrical connection between corresponding metal contacts 11 of adjacent layers of metal conductive mesh 1, thereby improving the reliability of the electrical connection between adjacent layers of metal conductive mesh 1.

[0028] The number of layers of the metal conductive mesh 1 can be set according to the size requirements and reliability requirements of the superconducting particles. The more layers of the metal conductive mesh 1, the larger the size of the superconducting particles, but the better the reliability of the superconducting particles.

[0029] It should be noted that, Figure 2 This illustration only demonstrates the case where the superconducting particle includes three layers of stacked metal conductive mesh 1, and does not limit the number of metal conductive mesh 1 in the superconducting particle. The structure of the superconducting particle in this embodiment is not limited to this, as long as it can achieve the core inventive point of this embodiment.

[0030] In an optional embodiment, the metal conductive mesh 1 is at least one of copper mesh, titanium mesh, or copper alloy mesh, which can improve the conductivity of the metal conductive mesh 1, reduce heat generation, and make the metal conductive mesh 1 less susceptible to oxidation, thereby improving the reliability of the superconducting particles.

[0031] The wire diameter of the metal conductive mesh 1 ranges from 10μm to 200μm. Specifically, the range of wire diameter for the metal conductive mesh 1 is limited based on the material of the metal conductive mesh 1 and the heating requirements of the superconducting particles (i.e., the current withstand requirements of the superconducting particles). The higher the resistance of the metal conductive mesh 1 and the higher the heating requirements of the superconducting particles (i.e., the higher the current withstand requirement of the superconducting particles), the larger the wire diameter can be set; conversely, if the resistance of the metal conductive mesh 1 is lower and the heating requirements of the superconducting particles are lower, the larger the wire diameter can be set. Thus, by setting the wire diameter of the metal conductive mesh 1 within the range of 10μm-200μm, the instantaneous large current when the superconducting particles come into contact with the circuit can be effectively dispersed, resulting in lower heating of the superconducting particles and improved current withstand capability.

[0032] Along the first direction L1, a plurality of metal contacts 11 are uniformly provided on the opposing first and second surfaces of the superconducting particle. When the first or second surface serves as the contact surface for contacting the corresponding circuit on the PCB, the metal contacts 11 make contact with the corresponding circuit on the PCB, thus conducting the corresponding circuit. This allows both the first and second surfaces to serve as conductive contact surfaces for the superconducting particle, which helps to improve the lifespan of the metal conductive particle. Furthermore, when assembling the superconducting particle into a silicone button, it is not necessary to identify the conductive contact surface of the superconducting particle, preventing the reverse installation of the superconducting particle from affecting the conductivity of the silicone button, thereby improving the assembly efficiency of the silicone button. In addition, since both the first and second surfaces are provided with a plurality of metal contacts 11, reliable contact between the superconducting particle and the corresponding circuit on the PCB can be ensured, resulting in good conductivity.

[0033] It should also be noted that, Figure 1 The example shown is merely illustrative of a cylindrical superconducting particle and does not limit the shape and size of the superconducting particle. The shape and size of the superconducting particle provided in this embodiment can be limited according to actual usage requirements, provided that the core inventive points of this utility model are achieved.

[0034] In this embodiment, the superconducting particle includes a multilayered metal conductive mesh, which forms a three-dimensional conductive network with uniform aperture. Multiple metal contacts are provided on the first and second surfaces of the superconducting particle, resulting in low contact resistance that is independent of contact pressure. This also allows electrical conductivity between the multilayered metal conductive meshes, improving the reliability of the superconducting particle's switching function. Furthermore, the uniformity of the metal contacts ensures reliable contact between the superconducting particle and the circuit even when oxidation or dust contamination is present on the first or second surface, demonstrating good conductivity. Simultaneously, setting the wire diameter of the metal conductive mesh to a range of 10μm-200μm stabilizes the structure of the superconducting particle and effectively disperses the instantaneous large current when the superconducting particle contacts the circuit, making the superconducting particle more current-resistant.

[0035] Optional, continue to refer to Figure 1 and Figure 2 As shown, the superconducting particles 100 also include an elastomer material 20, which completely fills the pores of the three-dimensional conductive network to support each layer of metal conductive mesh 1, thereby preventing the superconducting particles from wearing out and deforming after repeated pressing of the silicone button, thus affecting the reliability of the silicone button.

[0036] The elastomer material 20 may include, but is not limited to, silicone rubber, silicone resin, or other silicone materials, as long as it possesses elastic and wear-resistant properties. In an optional embodiment, when the elastomer material 20 is silicone, a multilayered metal conductive mesh 1 can be placed in a mold, wherein the contacts of the outermost metal conductive mesh 1 are in contact with the inner wall of the mold. Then, liquid silicone is injected into the mold, and molding is performed at an appropriate temperature and pressure, so that the liquid silicone completely fills the pores of the three-dimensional conductive network and solidifies to form superconducting particles.

[0037] Optionally, the superconducting particles are connected to the silicone switch in the form of contact sheets, and the elastomer material 20 is silicone, so that the silicone switch and the elastomer material 20 in the superconducting particles can be integrally molded, making the connection between the silicone switch and the superconducting particles more reliable, thereby ensuring higher connection reliability between the silicone switch and the superconducting particles, increasing the effective number of presses of the silicone button, and thus increasing the service life of the silicone button.

[0038] Optionally, multiple metal contacts 11 are disposed on the metal conductive mesh 1 of the first and second surfaces, such that the multiple metal contacts 11 are integrally formed with the metal conductive mesh 1 of the first or second surface, which is beneficial to improving the conductivity reliability of the superconducting particles.

[0039] In one optional embodiment, the metal conductive mesh 1 of the superconducting particle can be prepared by etching, punching or 3D printing. Then, the multiple layers of metal conductive mesh 1 are stacked so that the corresponding metal contacts 11 in each layer of metal conductive mesh 1 come into contact, thereby realizing the electrical connection between the layers of metal conductive mesh 1. This simplifies the preparation process of the superconducting particle and makes the wire diameter and pore size of the metal conductive mesh 1 in the superconducting particle controllable, which is beneficial to improving the conductivity of the superconducting particle.

[0040] It should be noted that the height of each metal contact 11 on the first surface and / or on the first surface should be the same along the first direction L1, so that when the first surface and the second surface contact the corresponding circuit of the PCB, the corresponding metal contact 11 can contact the circuit, which is beneficial to improving the conductivity reliability of the superconducting particles.

[0041] Optionally, the height H of the metal contact 11 along the first direction L1 ranges from 0.003mm to 100mm. When the height H of the metal contact 11 along the first direction L1 is less than 0.003mm, due to the small height H, the metal contact 11 cannot reliably connect to the circuit when the first or second surface of the superconducting particle contacts the corresponding circuit on the PCB, resulting in the inability to conduct or stably conduct the corresponding circuit. Conversely, when the height H of the metal contact 11 along the first direction L1 is greater than 100mm, the metal contact 11 is prone to deformation due to its excessive height H. As the number of uses of the silicone button increases, some of the metal contacts 11 wear down, resulting in inconsistent heights of the metal contacts 11 and affecting the reliability of the superconducting particle. By limiting the height H of the metal contact 11 along the first direction L1 to between 0.003mm and 100mm, it is possible to ensure that when the first or second surface of the superconducting particle contacts the corresponding circuit of the PCB, the metal contact 11 establishes a reliable electrical connection with the corresponding circuit, thereby improving the reliability of the silicone button.

[0042] Optionally, the diameter of the metal contact 11 along the first or second surface can range from 1.5mm to 10mm. When the diameter of the metal contact 11 along the first or second surface is less than 1.5mm, due to the small diameter, the metal contact 11 is prone to wear when it contacts the corresponding circuit on the PCB, resulting in the metal contact 11 failing to reliably connect to the circuit, thus preventing the circuit from conducting or stably conducting. Conversely, when the diameter of the metal contact 11 along the first or second surface is greater than 10mm, due to the large diameter, if the corresponding metal contact 11 is oxidized or contaminated, reliable contact between the superconducting particle and the circuit cannot be ensured, thus affecting the reliability of the superconducting particle. By limiting the diameter of the metal contact 11 along the first surface or the first surface to between 1.5mm and 10mm, it is possible to further ensure that when the first or second surface of the superconducting particle contacts the corresponding circuit of the PCB, the metal contact 11 establishes a reliable electrical connection with the corresponding circuit, thereby improving the reliability of the silicone button.

[0043] Optionally, the aperture of the three-dimensional conductive network can be in the range of 20μm-200μm. When the aperture of the three-dimensional conductive network is less than 20μm, the elastomer material 20 cannot completely fill the aperture of the three-dimensional conductive network due to the small aperture, which causes the superconducting particles to wear and deform after repeated pressing of the silicone button, thus affecting the reliability of the silicone button. Conversely, when the aperture of the three-dimensional conductive network is greater than 200μm, the conductivity reliability of the metal conductive mesh 1 is reduced due to the large aperture, and the number of metal contacts 11 is too small, which in turn leads to insufficient conductivity reliability of the superconducting particles.

[0044] It should be noted that, Figure 1 This illustration only demonstrates the case where the shape of the holes in the three-dimensional conductive network is rectangular (square), and does not limit the mesh pattern of the metal conductive mesh 1. This embodiment does not specifically limit the mesh pattern of the metal conductive mesh 1, as long as it achieves the core inventive point of this utility model. Optionally, the shape of the holes in the three-dimensional conductive network includes at least one of circles and polygons, wherein polygons include, but are not limited to, triangles, rectangles, rhombuses, and hexagons, allowing the superconducting particles to select the mesh pattern of the metal conductive mesh 1 according to actual needs.

[0045] Based on the same concept, this utility model embodiment also provides a silicone button. Figure 3 This is a schematic diagram of the structure of a silicone button provided in this embodiment, for reference. Figure 3 As shown, the silicone button includes a silicone switch 200 and a superconducting particle 100 provided in any embodiment of the present invention.

[0046] In this embodiment, since the silicone button includes the superconducting particles provided in any embodiment of the present invention, the silicone button can achieve the beneficial effects of the superconducting particles provided in any embodiment of the present invention. For similarities, please refer to the description above.

[0047] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A superconducting particle, characterized in that, include: A multi-layered metal conductive mesh; the multiple layers of the metal conductive mesh form a three-dimensional conductive network with uniform aperture; The wire diameter of the metal conductive mesh ranges from 10μm to 200μm; along the first direction, the superconducting particles have opposing first and second surfaces, and the first and second surfaces are each uniformly provided with a plurality of metal contacts; the first direction is perpendicular to the extension direction of the metal conductive mesh.

2. The superconducting particle according to claim 1, characterized in that, Also includes: An elastomeric material; the elastomeric material completely fills the pores of the three-dimensional conductive network.

3. The superconducting particle according to claim 1, characterized in that, The plurality of metal contacts are disposed on the metal conductive mesh of the first surface and the second surface.

4. The superconducting particles according to claim 1 or 3, characterized in that, The height range of the metal contact along the first direction is 0.003mm-100mm.

5. The superconducting particles according to claim 1 or 3, characterized in that, The diameter of the metal contact along the first surface or the second surface ranges from 1.5mm to 10mm.

6. The superconducting particle according to claim 1, characterized in that, The aperture of the three-dimensional conductive network ranges from 20μm to 200μm.

7. The superconducting particle according to claim 1 or 6, characterized in that, The shape of the holes in the three-dimensional conductive network includes at least one of circles and polygons.

8. The superconducting particle according to claim 2, characterized in that, The superconducting particles are connected to the silicone switch in the form of contact sheets; the elastomer material is silicone.

9. The superconducting particle according to claim 1, characterized in that, The conductive metal mesh is at least one of copper mesh, titanium mesh, or copper alloy mesh.

10. A silicone button, characterized in that, Includes silicone switches and superconducting particles as described in any one of claims 1-9.

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