Conductive adhesive tape with excellent connection performance

Abstract

The utility model discloses a conductive adhesive tape with excellent connection performance, which relates to the technical field of conductive adhesive tapes and comprises a conductive adhesive tape main body and a connecting part, the conductive adhesive tape main body comprises a silicon rubber base material layer, a conductive layer arranged in the silicon rubber base material layer, a bonding layer arranged on one end face of the silicon rubber base material layer and a protective layer arranged on the other end face of the silicon rubber base material layer, and the conductive layer is formed by uniformly distributing conductive filler in the silicon rubber base material layer; wherein at least one end of the conductive adhesive main body is provided with the connecting part, and the surface roughness of the connecting part is greater than that of the conductive adhesive main body; through the design of the connecting part, the friction force and the adhesive force when the connecting part is connected with other parts are effectively increased, when the connecting part is in contact with a connected object, larger surface roughness can form more microscopic contact points, the stability and the reliability of connection are improved, the conductive adhesive tape is not easy to loosen or fall off, and the service life of the conductive adhesive tape is prolonged. And the stability of conductive connection is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive rubber strips, in particular to a conductive rubber strip with excellent connection performance. Background Art

[0002] With the rapid development of electronic technology, conductive adhesive strips have been widely used in numerous fields, including electronics, electrical engineering, automotive, and aerospace. Traditional conductive connection methods often use metal wires or welding, but these methods have many limitations in certain scenarios. For example, with the trend towards miniaturization and lightweighting of electronic devices, the size and weight of metal wires can become a limiting factor. Furthermore, welding is not suitable for connecting components that require frequent disassembly or are temperature-sensitive, as the welding process can cause thermal damage to electronic components.

[0003] In the existing technology, conductive rubber strips, as an emerging conductive connection material, have solved some problems to a certain extent, but there are still some shortcomings. The current conductive rubber strips are usually composed of a silicone rubber base layer and a conductive layer, and their connection performance needs to be further improved. On the one hand, when the existing conductive rubber strips are connected to other components, due to the smooth surface, insufficient friction and adhesion, it is easy to have a loose connection. Especially in environments such as vibration and impact, it may cause connection failure and affect the normal operation of the equipment. On the other hand, the existing conductive rubber strips lack special consideration for the connection parts in the design, and cannot meet the diverse requirements for connection performance in different application scenarios.

[0004] For example, in typical electronic products, where connections may not be flat, existing conductive adhesive strips may not be well adapted to these non-planar connection requirements, resulting in unstable connections. In some electronic products requiring high connection stability, existing conductive adhesive strips may not provide a reliable conductive connection, impacting product performance and service life.

[0005] In summary, in order to meet the growing market demand and higher requirements for conductive connection performance in different application scenarios, it is necessary to develop a conductive adhesive strip with excellent connection performance to overcome the shortcomings of the existing technology. Utility Model Content

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] A conductive rubber strip with excellent connection performance, comprising a conductive rubber strip body and a connecting portion, wherein the conductive rubber strip body comprises a silicone rubber base layer, a conductive layer disposed within the silicone rubber base layer, an adhesive layer disposed on one end surface of the silicone rubber base layer, and a protective layer disposed on the other end surface of the silicone rubber base layer, wherein the conductive layer is formed by uniformly distributing conductive fillers within the silicone rubber base layer;

[0008] Wherein, at least one end of the conductive adhesive body is provided with the connecting portion, and the surface roughness of the connecting portion is greater than the surface roughness of the conductive adhesive body.

[0009] As a further solution of the present invention: the connecting portion is provided on one end face of the silicone rubber base material layer corresponding to the protective layer, and the protective layer fully covers the connecting portion, wherein:

[0010] A protrusion structure is provided along the surface of the connecting portion, and the protrusion structure can form a connecting protrusion at a position of the protective layer corresponding to the protrusion structure when the protective layer is compressed; or,

[0011] A groove structure is provided along the surface of the connecting portion, and the groove structure can form a connecting groove at a position of the protective layer corresponding to the groove structure when the protective layer is under pressure.

[0012] As a further solution of the present invention: when the connecting protrusion is formed, the protrusion structure penetrates or does not penetrate the protective layer.

[0013] As a further solution of the present invention: when forming the connecting groove, the protective layer is filled in the groove structure at a position corresponding to the groove structure, wherein the depth of the groove structure is greater than the thickness of the protective layer.

[0014] As a further solution of the present invention: the connecting portion is arranged on one end face of the silicone rubber base material layer corresponding to the protective layer, and the protective layer partially covers the connecting portion, wherein the connecting portion is located in an area not covered by the protective layer and is provided with a protrusion structure or a groove structure.

[0015] As a further solution of the present invention: the connecting portion is arranged on the side of the conductive rubber strip body, and one end of the connecting portion gradually widens toward the other end thereof to form a wedge shape.

[0016] As a further solution of the present invention: the conductive filler is one or more combinations of silver powder, aluminum powder, nickel powder, and carbon powder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] By setting the connecting part at one or more ends of the conductive adhesive strip body, its surface roughness is greater than the surface roughness of the conductive adhesive body. This design effectively increases the friction and adhesion when the connecting part is connected to other components. When the connecting part contacts the connection object, the larger surface roughness can form more microscopic contact points, thereby improving the stability and reliability of the connection. In environments such as vibration and impact, the conductive adhesive strip is not easy to loosen or fall off, ensuring the stability of the conductive connection. It is suitable for various complex connection scenarios, including non-planar connections, and can meet the connection needs of different electronic products.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of a structure in which the protective layer fully covers the connecting part in the utility model;

[0022] Figure 2 This is another structural diagram of the present invention in which the protective layer fully covers the connecting portion;

[0023] Figure 3 This is a schematic diagram of a structure in which the protective layer partially covers the connecting portion in the present invention;

[0024] Figure 4 This is another structural diagram of the utility model in which the protective layer partially covers the connecting part;

[0025] Figure 5 This is a schematic structural diagram of the utility model in which the connecting portion is located on the side of the conductive rubber strip body.

[0026] The reference numerals and names in the figures are as follows:

[0027] 1. Silicone rubber base material layer; 2. Conductive layer; 3. Adhesive layer; 4. Protective layer; 5. Connecting part; 6. Protrusion structure; 7. Groove structure. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-5 In an embodiment of the present invention, a conductive rubber strip with excellent connection performance includes a conductive rubber strip body and a connecting portion 5. The conductive rubber strip body includes a silicone rubber base layer 1, a conductive layer 2 disposed within the silicone rubber base layer 1, an adhesive layer 3 disposed on one end surface of the silicone rubber base layer 1, and a protective layer 4 disposed on the other end surface of the silicone rubber base layer 1. The conductive layer 2 is formed by uniformly distributing conductive fillers within the silicone rubber base layer 1.

[0030] The connecting portion 5 is provided at at least one end of the conductive adhesive body, and the surface roughness of the connecting portion 5 is greater than that of the conductive adhesive body.

[0031] In the technical solution of the present utility model, the conductive rubber strip body is divided into a silicone rubber substrate layer 1, a conductive layer 2, an adhesive layer 3, and a protective layer 4, thereby achieving the integration of different functions. The silicone rubber substrate layer 1 provides good flexibility and elasticity to adapt to the connection requirements of various shapes; the conductive layer 2 ensures the conductive performance; the adhesive layer 3 facilitates the rapid fixation of the conductive rubber strip to the connection object; and the protective layer 4 protects the conductive layer 2 from the influence of external environmental factors. This layered structure allows the conductive rubber strip to have the conductive function while also meeting the requirements of mechanical connection and environmental protection. In addition, the conductive filler is evenly distributed in the silicone rubber substrate layer 1 to form the conductive layer 2, ensuring the uniformity and stability of the conductive performance.

[0032] By arranging the connecting part 5 at one or more ends of the conductive adhesive strip body, its surface roughness is greater than the surface roughness of the conductive adhesive body. This design is to increase the friction and adhesion when the connecting part 5 is connected to other components. When the connecting part 5 contacts the connection object, the larger surface roughness can form more microscopic contact points, thereby improving the stability and reliability of the connection, so that the conductive adhesive strip is not easy to loosen or fall off in environments such as vibration and impact, ensuring the stability of the conductive connection, and being suitable for various complex connection scenarios, including non-planar connections, and can meet the connection requirements of different electronic products.

[0033] Among them, the connecting part 5 can be formed by a metal-rubber composite material, which is a compound of metal particles or fibers and rubber material. It has both the conductivity of metal and the flexibility and elasticity of rubber. The ratio of metal and rubber can be adjusted as needed to meet different performance requirements, or it can be other materials, which are not limited here.

[0034] In the embodiment of the present invention, the connecting portion 5 is provided on one end surface of the silicone rubber substrate layer 1 corresponding to the protective layer 4, and the protective layer 4 fully covers the connecting portion 5, wherein:

[0035] A protruding structure 6 is provided along the surface of the connecting portion 5. When the protective layer 4 is compressed, the protruding structure 6 forms a connecting protrusion at a position corresponding to the protruding structure 6 on the protective layer 4. When the connecting protrusion is formed, the protruding structure 6 may or may not penetrate the protective layer 4.

[0036] Or a groove structure 7 is provided along the surface of the connecting portion 5, and the groove structure 7 can form a connecting groove at a position of the protective layer 4 corresponding to the groove structure 7 when the protective layer 4 is under pressure; wherein, when the connecting groove is formed, the position of the protective layer 4 corresponding to the groove structure 7 is filled with the groove structure 7, and the depth of the groove structure 7 is greater than the thickness of the protective layer 4.

[0037] The connecting portion 5 is arranged on one end surface of the silicone rubber substrate layer 1 corresponding to the protective layer 4. This can fully utilize the protective layer 4 to protect the connecting portion 5. It also facilitates special structural design on the connecting portion 5 to enhance the connection performance. The protective layer 4 fully covers the connecting portion 5, providing all-round protection for the connecting portion 5 and preventing the connecting portion 5 from being affected by external environmental factors such as oxidation, corrosion, and wear.

[0038] A raised structure 6 is provided on the surface of the connecting portion 5. When the protective layer 4 is pressurized, the raised structure 6 causes a connecting protrusion to be formed at a corresponding position of the protective layer 4. This design can increase the contact area and friction between the connecting portion 5 and the connected object, thereby improving the stability and reliability of the connection. The raised structure 6 may or may not penetrate the protective layer 4, and can be selected according to different connection requirements. If a stronger connection force is required, a raised structure 6 that penetrates the protective layer 4 can be selected so that the connecting portion 5 is in direct contact with the connected object. For example, the protective layer 4 can be a thin conductive film that can be slightly compressed or deformed during connection to ensure good contact between the connecting portion 5 and the external component. If a certain degree of protection is required, a raised structure 6 that does not penetrate the protective layer 4 can be selected so that the connecting portion 5 is in indirect contact with the connected object through the connecting protrusion.

[0039] Specifically, in electronic devices such as smartphones and tablet computers, the connecting portion 5 of the conductive adhesive strip may adopt a raised structure 6. For example, when connecting the battery to the device body, the raised structure 6 can penetrate the protective layer 4 and directly contact the metal contacts inside the device, ensuring stable power transmission. The raised structure 6 that does not penetrate the protective layer 4 can increase friction when connecting the flexible circuit board to the motherboard, preventing the connection from loosening due to slight vibration of the device.

[0040] A groove structure 7 is provided on the surface of the connecting portion 5. When the protective layer 4 is subjected to pressure, a connecting groove is formed at the position of the protective layer 4 corresponding to the groove structure 7. This design enables an embedded connection to be formed between the connecting portion 5 and the connected object, thereby increasing the stability and firmness of the connection. The position of the protective layer 4 corresponding to the groove structure 7 is filled with the groove structure 7, and the depth of the groove structure 7 is greater than the thickness of the protective layer 4. This ensures sufficient contact area and connection strength between the connecting portion 5 and the connected object.

[0041] Specifically: For some small electronic devices, such as Bluetooth headsets, wireless chargers, etc., the groove structure 7 can play a role in the connection between the charging interface and the charging cable. The groove structure 7 can make the protective layer 4 fit the charging interface better, preventing the charging cable from causing wear to the connecting part 5 during the plugging and unplugging process, thereby extending the service life of the device.

[0042] In an embodiment of the present invention, the connecting portion 5 is arranged on one end surface of the silicone rubber base material layer 1 corresponding to the protective layer 4, and the protective layer 4 partially covers the connecting portion 5, wherein the connecting portion 5 is located in an area not covered by the protective layer 4 and is provided with a protrusion structure 6 or a groove structure 7.

[0043] The protective layer 4 is partially covered on the connection part 5. In this way, the use of the protective layer 4 material can be reduced while providing necessary protection, thereby reducing costs. At the same time, it can also prevent the protective layer 4 from having an adverse effect on the connection function of certain specific areas of the connection part 5. That is, the protective layer 4 is only covered on specific areas of the connection part 5, which can protect the key parts without affecting the connection function of the connection part 5. This design can be customized according to the actual needs of the connection part 5, thereby improving the flexibility of the design. That is, by precisely controlling the coverage of the protective layer 4, targeted protection and connection design can be carried out according to the needs of different areas of the connection part 5.

[0044] The purpose of setting a connecting protrusion or connecting groove in the area not covered by the protective layer 4 is to increase the contact area and connection stability between the connecting part 5 and the connection object. The connecting protrusion can be inserted into the corresponding groove of the connection object during connection to form a mechanical lock; the connecting groove can accommodate the protruding part of the connection object to achieve an embedded connection. This design can be selected according to different connection requirements and application scenarios to improve the adaptability and flexibility of the conductive rubber strip.

[0045] In the embodiment of the present invention, the connecting portion 5 is provided on the side of the conductive rubber strip body, and one end of the connecting portion 5 gradually widens toward the other end thereof to form a wedge shape.

[0046] Providing the connection portion 5 on the side of the conductive rubber strip body can fully utilize the spatial layout of the conductive rubber strip and adapt to different installation environments and connection requirements. In some specific application scenarios, the side connection can more conveniently achieve connection with other components, avoiding the space limitations that may be caused by end connections. For example, in the narrow internal space of some electronic devices, the conductive rubber strip connected on the side can better cooperate with other components and improve space utilization (in this case, the adhesive layer 3 can be added or not added according to the situation, or the adhesive layer 3 can be added to the surface of the connection portion 5);

[0047] One end of the connecting portion 5 gradually widens toward the other end and is wedge-shaped. The principle of this design is to utilize the structural characteristics of the wedge to provide better guidance and insertion performance during the connection process. The tip of the wedge can be more easily inserted into the corresponding interface of the connection object. As the insertion depth increases, the width of the connecting portion 5 gradually increases, thereby achieving a tighter connection. At the same time, the wedge shape can also increase the contact area between the connecting portion 5 and the connection object, thereby improving the stability and reliability of the connection.

[0048] In an embodiment of the present invention, the conductive filler is one or more combinations of silver powder, aluminum powder, nickel powder, and carbon powder.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A conductive rubber strip with excellent connection performance, characterized in that: The conductive rubber strip comprises a main body and a connecting portion, wherein the main body comprises a silicone rubber base layer, a conductive layer disposed within the silicone rubber base layer, an adhesive layer disposed on one end surface of the silicone rubber base layer, and a protective layer disposed on the other end surface of the silicone rubber base layer, wherein the conductive layer is formed by uniformly distributing conductive fillers within the silicone rubber base layer; Wherein, at least one end of the conductive rubber strip body is provided with the connecting portion, and the surface roughness of the connecting portion is greater than the surface roughness of the conductive rubber strip body.

2. The conductive rubber strip with excellent connection performance according to claim 1, characterized in that: The connecting portion is provided on one end surface of the silicone rubber base material layer corresponding to the protective layer, and the protective layer fully covers the connecting portion, wherein: A protrusion structure is provided along the surface of the connecting portion, and the protrusion structure can form a connecting protrusion at a position of the protective layer corresponding to the protrusion structure when the protective layer is compressed; or, A groove structure is provided along the surface of the connecting portion, and the groove structure can form a connecting groove at a position of the protective layer corresponding to the groove structure when the protective layer is under pressure.

3. The conductive rubber strip with excellent connection performance according to claim 2, characterized in that: When forming the connection protrusions, the protrusion structures may penetrate or not penetrate the protective layer.

4. The conductive rubber strip with excellent connection performance according to claim 2, characterized in that: When forming the connecting groove, the protective layer is filled in the groove structure at a position corresponding to the groove structure, wherein the depth of the groove structure is greater than the thickness of the protective layer.

5. The conductive rubber strip with excellent connection performance according to claim 1, characterized in that: The connecting portion is arranged on one end surface of the silicone rubber base material layer corresponding to the protective layer, and the protective layer partially covers the connecting portion, wherein the connecting portion is provided with a protrusion structure or a groove structure in the area not covered by the protective layer.

6. The conductive rubber strip with excellent connection performance according to claim 1, characterized in that: The connecting portion is arranged on the side of the conductive rubber strip body, and one end of the connecting portion gradually widens toward the other end thereof to form a wedge shape.

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