Conductive elastic connection structure

Abstract

The utility model discloses a conductive elastic connection structure, which comprises an elastic conductor and a connection assembly, the elastic conductor is used for being connected and electrically conducted with a grounding area through the connection assembly, the elastic conductor comprises a silicon rubber body and a conductive coating, the conductive coating is coated on the outer side surface of the silicon rubber body, and the conductive coating is coated on the outer side surface of the silicon rubber body. The conductive coating is formed by mixing silicone rubber and conductive filler, and the conductive filler is pure silver powder or silver-coated aluminum powder. According to the utility model, the outer side surface of the silicone rubber body is coated with the conductive coating, the conductive coating is formed by mixing the silicone rubber material and the conductive filler, and the conductive filler is the pure silver powder or the silver-coated aluminum powder, so that the manufacturing process is simpler, the cost is saved, and the low PI M conduction of a good high-frequency signal can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive connection structures, in particular to a conductive elastic connection structure. Background Art

[0002] At present, the elastic conductor of the grounding conductive elastic connection structure used on the PCB board includes silicone rubber and a conductive layer coated on the outside of the silicone rubber. The existing conductive layer is generally attached to the outer side of the silicone rubber by electroplating.

[0003] However, due to the chemical inertness of the silicone rubber surface itself, it is relatively difficult to electroplate a conductive layer on the surface of the silicone rubber, and the process is also relatively cumbersome. It is also difficult to ensure that the electroplated layer can be firmly attached to the outside of the silicone rubber. Utility Model Content

[0004] The purpose of the utility model is to provide a conductive elastic connection structure, which is conducive to reducing costs and ensuring stable use.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A conductive elastic connection structure comprises an elastic conductor and a connection component, wherein the elastic conductor is used to be connected to a grounding area through the connection component and to be electrically conductive, wherein the elastic conductor comprises a silicone rubber body and a conductive coating, wherein the conductive coating is coated on the outer side of the silicone rubber body, wherein the conductive coating is a mixture of silicone rubber and a conductive filler, wherein the conductive filler is pure silver powder or silver-coated aluminum powder.

[0007] Preferably, the thickness of the conductive coating is 10-120 um.

[0008] Preferably, the connecting assembly includes a metal support member, which includes a base plate and a connecting plate. The bottom surface of the base plate is fixed to the grounding area, the connecting plates are provided on both sides of the top surface of the base plate, and there is a gap between the connecting plates on both sides of the base plate. The elastic conductor is connected to the metal support member by glue, and the glue is filled in the gap.

[0009] Preferably, the connecting component includes a pressure-sensitive adhesive layer, the elastic conductor is bonded to the upper side of the pressure-sensitive adhesive layer by glue, the lower side of the pressure-sensitive adhesive layer is used to bond to the PCB board, and the projection area of ​​the pressure-sensitive adhesive layer toward the PCB board is smaller than the projection area of ​​the bottom surface of the elastic conductor toward the PCB board, so that the elastic conductor is electrically conductive with the grounding area of ​​the PCB board.

[0010] Preferably, the glue is thermosetting glue.

[0011] Preferably, the connection assembly further comprises an insulating support layer, wherein the insulating support layer is located between the elastic conductor and the pressure-sensitive adhesive layer, the elastic conductor is bonded to the upper side of the insulating support layer by glue, and the insulating support layer is bonded to the pressure-sensitive adhesive layer.

[0012] Preferably, the insulating support layer is made of PET material or PI material.

[0013] Preferably, the connecting component also includes a gold-plated conductive cloth, which is located between the elastic conductor and the pressure-sensitive adhesive layer, the elastic conductor is bonded to the upper side of the gold-plated conductive cloth by glue, the gold-plated conductive cloth is bonded to the pressure-sensitive adhesive layer, and the projection area of ​​the gold-plated conductive cloth toward the PCB board is larger than the projection area of ​​the pressure-sensitive adhesive layer toward the PCB board.

[0014] Preferably, the thickness of the gold-plated conductive cloth is 30-100 um.

[0015] Preferably, the outer periphery of the gold-plated conductive cloth is flush with the outer edge of the bottom surface of the elastic conductor.

[0016] Compared with the prior art, the conductive elastic connection structure of the utility model has the following beneficial effects:

[0017] In the present invention, the conductive coating is coated on the outer side of the silicone rubber body, and the conductive coating is a mixture of silicone rubber material and conductive filler, and the conductive filler is pure silver powder or silver-coated aluminum powder. Therefore, the elastic conductor of the present application does not need to form a conductive layer on the outer side of the silicone rubber body by electroplating. By using the conductive coating, a stable conductive coating can be formed on the outer side of the silicone rubber body, and the manufacturing process is simpler, which is conducive to cost saving. In addition, the conductive filler is pure silver powder or silver-coated aluminum powder, which has the characteristics of small volume resistance and non-magnetic, and can ensure good low PIM conduction of high-frequency signals (especially 2G frequency band). In addition, compared with the prior art using a nano silver wire layer as a conductive layer, the conductive coating of the present application is not only more wear-resistant and not easy to fall off, but also can save costs and simplify the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of one embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of one implementation mode of another embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of another implementation manner of another embodiment of the utility model.

[0021] In the figure, 1. elastic conductor; 11. silicone rubber body; 12. conductive coating; 13. through hole; 2. connecting component; 21. pressure-sensitive adhesive layer; 22. thermosetting glue; 23. insulating support layer; 24. gold-plated conductive cloth; 25. bottom plate; 26. connecting plate. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present utility model, it should be understood that the wording "comprising" used in the present utility model specification refers to the presence of the features, integers, steps, operations, parts / components and / or assemblies, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, assemblies and / or their groups. It should be understood that when we say that a part / component is "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The wording "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0024] like Figures 1 to 3 As shown, the utility model relates to a conductive elastic connection structure, comprising an elastic conductor 1 and a connection component 2, wherein the elastic conductor 1 is used to be connected to a grounding area through the connection component 2 and electrically conductive, wherein the elastic conductor 1 comprises a silicone rubber body 11 and a conductive coating 12, wherein the conductive coating 12 is coated on the outer side of the silicone rubber body 11, wherein the conductive coating 12 is formed by mixing silicone rubber and conductive filler, wherein the conductive filler is pure silver powder or silver-coated aluminum powder.

[0025] In the present invention, the conductive coating 12 is coated on the outer side of the silicone rubber body 11, and the conductive coating 12 is a mixture of silicone rubber material and conductive filler, and the conductive filler is pure silver powder or silver-coated aluminum powder. Therefore, the elastic conductor 1 of the present application does not need to form a conductive layer on the outer side of the silicone rubber body 11 by electroplating. By using the conductive coating 12, a stable conductive coating 12 can be formed on the outer side of the silicone rubber body 11, and the manufacturing process is simpler, which is conducive to cost saving. In addition, the conductive filler is pure silver powder or silver-coated aluminum powder, which has the characteristics of small volume resistance and non-magnetic, and can ensure good low PI M conduction of high-frequency signals (especially 2G frequency band). In addition, compared with the prior art using a nano silver wire layer as a conductive layer, the conductive coating 12 of the present application is not only more wear-resistant and not easy to fall off, but also can save costs and simplify the process.

[0026] The elastic conductor 1 is made of a silicone rubber body 11, so that it has good high temperature resistance and a longer service life. The silicone rubber body 11 has good resilience and has a good buffering effect.

[0027] Specifically, the thickness of the conductive coating 12 is 10-120 um, thereby meeting the high-frequency skin depth requirement.

[0028] In this embodiment, the silicone rubber body 11 can be a solid silicone rubber body 11 to have a strong supporting strength; the silicone rubber body 11 can also be a hollow structure. Specifically, a through hole 13 is provided in the silicone rubber body 11 along the length direction, so that when the silicone rubber body 11 is pressurized, the cross-sectional area of ​​the through hole 13 can be compressed, so that the through hole 13 can play a role in sharing the pressure, so as to play a better buffering and protective role between the electrical components and the PCB board.

[0029] Combination Figure 1 As shown, in one embodiment, the connecting component 2 includes a metal support member, and the metal support member includes a base plate 25 and a connecting plate 26. The bottom surface of the base plate 25 is fixed to the grounding area, and the connecting plates 26 are provided on both sides of the top surface of the base plate 25, and there is a gap between the connecting plates 26 located on both sides of the base plate 25. The elastic conductor 1 is connected to the metal support member by glue, and the glue is filled in the gap.

[0030] Specifically, the connecting plate 26 can be welded to both sides of the top surface of the bottom plate 25, or the two sides of the bottom plate 25 can be bent upward and attached to the top surface of the bottom plate 25 to form the connecting plate 26. Then, glue is injected into the gap between the connecting plates 26 on both sides of the bottom plate 25, and then the elastic conductor 1 is pressed onto the connecting plate 26 to allow the elastic conductor 1 to be fixed to the metal support by glue. The glue can be a thermosetting glue 22. In this way, the elastic conductor 1 can directly contact and conduct with the metal support, and the resistance is lower.

[0031] Then, the base plate 25 can be fixed to the grounding area by SMT soldering or tape. The base plate 25 and / or the connecting plate 26 can be made of metal suitable for SMT soldering, such as pure nickel, nickel-plated copper alloy, tin-plated metal or gold-plated metal.

[0032] Combination Figure 2 and Figure 3As shown, in another embodiment, the connecting component 2 includes a pressure-sensitive adhesive layer 21, the elastic conductor 1 is bonded to the upper side of the pressure-sensitive adhesive layer 21 by glue, and the lower side of the pressure-sensitive adhesive layer 21 is used for bonding to the PCB board, and the projection area of ​​the pressure-sensitive adhesive layer 21 toward the PCB board is smaller than the projection area of ​​the bottom surface of the elastic conductor 1 toward the PCB board, so that the elastic conductor 1 is electrically conductive with the grounding area of ​​the PCB board.

[0033] By providing the pressure-sensitive adhesive layer 21, the elastic conductor 1 can be firmly fixed on the PCB. At the same time, since the projection area of ​​the pressure-sensitive adhesive layer 21 toward the PCB is smaller than the projection area of ​​the bottom surface of the elastic conductor 1 toward the PCB, even if the elastic conductor 1 is fixed on the PCB by the pressure-sensitive adhesive layer 21, the elastic conductor 1 can be in contact with the grounding area of ​​the PCB to achieve electrical connection.

[0034] Preferably, the glue is a thermosetting glue 22 , and the thermosetting glue 22 may be insulating, such as silicone glue, or conductive, such as epoxy resin type glue containing silver particles.

[0035] Combination Figure 2 As shown, in one embodiment, the connecting component 2 also includes an insulating support layer 23, and the insulating support layer 23 is located between the elastic conductor 1 and the pressure-sensitive adhesive layer 21. Specifically, the insulating support layer 23 is made of PET material or PI material, and the elastic conductor 1 is bonded to the upper side of the insulating support layer 23 by glue, and the insulating support layer 23 is bonded to the pressure-sensitive adhesive layer 21.

[0036] The insulating support layer 23 is provided to support the pressure-sensitive adhesive layer 21 , which is beneficial to improving the strength of the pressure-sensitive adhesive layer 21 .

[0037] Combination Figure 3 As shown, in another embodiment, the connecting component 2 also includes a gold-plated conductive cloth 24, the thickness of the gold-plated conductive cloth 24 is 30-100um, the gold-plated layer of the gold-plated conductive cloth 24 is greater than 15nm, the gold-plated conductive cloth 24 is located between the elastic conductor 1 and the pressure-sensitive adhesive layer 21, the elastic conductor 1 is bonded to the upper side of the gold-plated conductive cloth 24 by glue, the gold-plated conductive cloth 24 is bonded to the pressure-sensitive adhesive layer 21, and the projection area of ​​the gold-plated conductive cloth 24 toward the PCB board is larger than the projection area of ​​the pressure-sensitive adhesive layer 21 toward the PCB board.

[0038] By using high-performance gold-plated conductive cloth 24 as the bottom contact interface of the elastic conductor 1 to electrically connect with the grounding area of ​​the PCB board, the anti-oxidation and electrochemical corrosion resistance can be improved, and the conductivity of the electrical connection between the elastic conductor 1 and the grounding area can be enhanced.

[0039] Preferably, the outer periphery of the gold-plated conductive cloth 24 is flush with the outer edge of the bottom surface of the elastic conductor 1 , so that the gold-plated conductive cloth 24 and the elastic conductor 1 can be more stably attached.

[0040] In summary, the embodiments of the present invention provide a conductive elastic connection structure, which is more stable and durable, and has a simpler and more convenient manufacturing process, thereby also saving costs.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A conductive elastic connection structure, characterized in that: It includes an elastic conductor and a connecting component, wherein the elastic conductor is used to be connected to a grounding area through the connecting component and to be electrically conductive, wherein the elastic conductor includes a silicone rubber body and a conductive coating, wherein the conductive coating is coated on the outer side of the silicone rubber body, wherein the conductive coating is a mixture of silicone rubber and a conductive filler, wherein the conductive filler is pure silver powder or silver-coated aluminum powder.

2. The conductive elastic connection structure according to claim 1, characterized in that: The thickness of the conductive coating is 10-120 um.

3. The conductive elastic connection structure according to claim 1, characterized in that: The connecting assembly includes a metal support member, which includes a base plate and a connecting plate. The bottom surface of the base plate is fixed to the grounding area, the connecting plates are provided on both sides of the top surface of the base plate, and there is a gap between the connecting plates located on both sides of the base plate. The elastic conductor is connected to the metal support member by glue, and the glue is filled in the gap.

4. The conductive elastic connection structure according to claim 1, characterized in that: The connecting component includes a pressure-sensitive adhesive layer, the elastic conductor is bonded to the upper side of the pressure-sensitive adhesive layer by glue, the lower side of the pressure-sensitive adhesive layer is used to be bonded to the PCB board, and the projection area of ​​the pressure-sensitive adhesive layer toward the PCB board is smaller than the projection area of ​​the bottom surface of the elastic conductor toward the PCB board, so that the elastic conductor is electrically connected to the grounding area of ​​the PCB board.

5. The conductive elastic connection structure according to claim 4, characterized in that: The glue is a thermosetting glue.

6. The conductive elastic connection structure according to claim 4, characterized in that: The connection assembly also includes an insulating support layer, which is located between the elastic conductor and the pressure-sensitive adhesive layer. The elastic conductor is bonded to the upper side of the insulating support layer by glue, and the insulating support layer is bonded to the pressure-sensitive adhesive layer.

7. The conductive elastic connection structure according to claim 6, characterized in that: The insulating support layer is made of PET material or PI material.

8. The conductive elastic connection structure according to claim 4, characterized in that: The connection component also includes a gold-plated conductive cloth, which is located between the elastic conductor and the pressure-sensitive adhesive layer. The elastic conductor is bonded to the upper side of the gold-plated conductive cloth by glue, and the gold-plated conductive cloth is bonded to the pressure-sensitive adhesive layer. The projection area of ​​the gold-plated conductive cloth toward the PCB board is larger than the projection area of ​​the pressure-sensitive adhesive layer toward the PCB board.

9. The conductive elastic connection structure according to claim 8, characterized in that: The thickness of the gold-plated conductive cloth is 30-100 um.

10. The conductive elastic connection structure according to claim 8, characterized in that: The outer periphery of the gold-plated conductive cloth is flush with the outer edge of the bottom surface of the elastic conductor.

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