Spliced conductive foam

Abstract

The utility model relates to a spliced conductive foam, including main body foam layer, conductive layer, splicing part and protection layer, the main body foam layer adopts polyurethane foaming material to make, the inside of main body foam layer is provided with a plurality of evenly distributed honeycomb air hole, the conductive layer is closely combined in the upper and lower two surfaces of main body foam layer, the conductive layer is woven with conductive fiber, and the conductive fiber adopts the material that metal fiber and carbon nanotube compound, and the metal fiber is preferably copper fiber. The spliced conductive foam, through setting up splicing part, utilizes the cooperation of wedge and wedge groove, can flexibly splice conductive foam according to actual demand, simultaneously, the conductive convex point on male splicing piece and the conductive elastic sheet in the inner wall of female splicing piece are closely contacted, ensure that the splicing place forms good conductive passage, guarantee overall conductive performance stable, effectively promote the applicability and electromagnetic shielding, electrical connection effect of conductive foam under different scenes.

Description

Technical Field

[0001] This utility model relates to the field of conductive foam technology, specifically to a spliced ​​conductive foam. Background Technology

[0002] With the development of electronic technology, electromagnetic radiation is causing increasingly serious pollution to humans, directly threatening human health. Conductive foam is usually installed inside electrical appliances.

[0003] A search revealed, for example, a utility model patent with Chinese patent publication number CN219919611U, which discloses a heat-dissipating, interlocking conductive foam. The foam includes a first foam body and a second foam body. Both the first and second foam bodies have snap-fit ​​grooves and snap-fit ​​blocks. The snap-fit ​​grooves are located on the right side of both foam bodies, and the snap-fit ​​blocks are located on the left side. The top of both foam bodies has heat dissipation grooves and ventilation holes. By evenly arranging corresponding matching snap-fit ​​grooves and snap-fit ​​blocks on both sides of the foam body, and setting the snap-fit ​​grooves and snap-fit ​​blocks into a trapezoidal stable structure, and providing a frosted layer structure on the inner end of the snap-fit ​​groove and the outer end of the snap-fit ​​block, the splicing stability and accuracy of the conductive foam are improved, as well as the overall heat dissipation of the conductive foam.

[0004] However, this patent cannot guarantee good conductivity at the splicing point during the splicing process, which can easily lead to interruption of the conductive path or poor contact, thereby affecting the electromagnetic shielding and electrical connection effect of the conductive foam. At the same time, the conductive layer on its surface lacks effective protective measures and is easily worn and aged during long-term use, resulting in a decrease in conductivity and a shortened service life of the conductive foam. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spliced ​​conductive foam, comprising a main foam layer, a conductive layer, a splicing part, and a protective layer.

[0006] The main foam layer is made of polyurethane foam material, and the interior of the main foam layer has a plurality of evenly distributed honeycomb-shaped air holes.

[0007] The conductive layer is tightly attached to the upper and lower surfaces of the main foam layer. The conductive layer is woven from conductive fibers. The conductive fibers are made of a composite material of metal fibers and carbon nanotubes. The metal fibers are preferably copper fibers.

[0008] The splicing part is disposed on the left and right sides of the main body foam layer. The splicing part includes a male splicing part and a female splicing part. The male splicing part and the female splicing part are respectively disposed on the opposite sides of adjacent main body foam layers. The male splicing part includes a wedge-shaped block. The surface of the wedge-shaped block is provided with conductive protrusions. The female splicing part includes a wedge-shaped groove opened on one side thereon. The inner wall of the wedge-shaped groove is provided with a conductive elastic sheet.

[0009] The protective layer covers the surface of the conductive layer. The protective layer is made of a transparent polyurethane film and is bonded to the conductive layer with an adhesive.

[0010] Furthermore, both the upper and lower surfaces of the main foam layer are planar and smooth.

[0011] Furthermore, the male connector is a cuboid strip structure, and the female connector is a cuboid strip groove structure that matches the male connector. The wedge-shaped groove is adapted to the wedge-shaped block, and the inclined surface of the wedge-shaped groove has the same angle as the inclined surface of the wedge-shaped block.

[0012] Furthermore, the conductive elastic sheet is made of copper alloy, and the wedge is made of conductive rubber.

[0013] Furthermore, the surface of the protective layer is provided with a plurality of uniformly distributed micro-protrusions, the micro-protrusions being hemispherical in shape and having a height of 0.05-0.1 mm.

[0014] Furthermore, the conductive layer has a uniform thickness and is firmly bonded to the main foam layer through a hot-pressing process. The edge of the conductive layer is provided with a folded portion, which folds over and extends toward the side of the main foam layer, covering part of the side of the main foam layer.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. This interlocking conductive foam, through the setting of splicing parts and the cooperation of wedge blocks and wedge grooves, can flexibly splice conductive foam according to actual needs; at the same time, the conductive protrusions on the male splice are in close contact with the conductive elastic sheet on the inner wall of the female splice, ensuring that a good conductive path is formed at the splice, ensuring stable overall conductivity, and effectively improving the applicability of conductive foam in different scenarios and its electromagnetic shielding and electrical connection effects.

[0017] 2. This spliced ​​conductive foam has a protective layer made of transparent polyurethane film, which is bonded to the conductive layer with adhesive. This effectively protects the conductive layer and improves the wear resistance and aging resistance of the conductive foam. The micro-protrusions on the surface of the protective layer reduce the contact area with external objects, further reducing friction, extending the service life of the conductive foam, and reducing performance degradation caused by damage to the conductive layer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the main foam layer and splicing part of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the conductive layer and the folded portion of this utility model;

[0021] Figure 4 This is a cross-sectional three-dimensional structural diagram of the main foam layer of this utility model.

[0022] In the diagram: 1. Main foam layer; 11. Honeycomb pores; 2. Conductive layer; 21. Folded part; 3. Splicing part; 31. Male splice; 311. Wedge block; 312. Conductive bump; 32. Female splice; 321. Wedge groove; 322. Conductive elastic sheet; 4. Protective layer; 41. Micro-protrusion. Detailed Implementation

[0023] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 The spliced ​​conductive foam in this embodiment includes a main foam layer 1, a conductive layer 2, a splicing part 3, and a protective layer 4.

[0025] The main foam layer 1 is made of polyurethane foam material, and the interior of the main foam layer 1 has multiple evenly distributed honeycomb-shaped air holes 11.

[0026] The main foam layer 1 serves as the basic support structure for the entire conductive foam. Multiple evenly distributed honeycomb-shaped pores 11 are arranged inside the main foam layer 1. These honeycomb-shaped pores 11 can reduce the overall weight while ensuring that the main foam layer 1 has good elasticity, and also help to improve the cushioning and shock absorption performance of the main foam layer 1. The upper and lower surfaces of the main foam layer 1 are both flat and smooth, providing a good foundation for the subsequent bonding of the conductive layer 2.

[0027] The conductive layer 2 is tightly attached to the upper and lower surfaces of the main foam layer 1. The conductive layer 2 is woven from conductive fibers. The conductive fibers are made of a composite material of metal fibers and carbon nanotubes, and the metal fibers are preferably copper fibers.

[0028] The conductive layer 2 is woven from conductive fibers. The conductive fibers are a composite material of metal fibers and carbon nanotubes, preferably copper fibers. This composite conductive fiber has both good conductivity and flexibility. The conductive layer 2 has a uniform thickness and is firmly bonded to the main foam layer 1 through a hot pressing process, ensuring that there is no relative displacement between the conductive layer 2 and the main foam layer 1, thereby ensuring the stability of the conductivity. The edge of the conductive layer 2 is provided with a folded part 21, which can fold and extend to the side of the main foam layer 1, covering part of the side of the main foam layer 1, further enhancing the conductivity of the conductive foam edge and preventing electromagnetic leakage.

[0029] The splicing part 3 is disposed on the left and right sides of the main body foam layer 1. The splicing part 3 includes a male splicing part 31 and a female splicing part 32. The male splicing part 31 and the female splicing part 32 are respectively disposed on the opposite sides of the adjacent main body foam layers 1. The male splicing part 31 includes a wedge block 311. The surface of the wedge block 311 is provided with conductive protrusions 312. The female splicing part 32 includes a wedge groove 321 opened on one side thereon. The inner wall of the wedge groove 321 is provided with a conductive elastic sheet 322.

[0030] The splicing part 3 is used to splice conductive foams together. The male splicing part 31 is a rectangular strip structure. One end of it is fixedly connected to the side of the main foam layer 1, and the other end is provided with an outwardly protruding wedge block 311. The wedge block 311 is made of conductive rubber and can make good contact with the female splicing part 32 during splicing to ensure the conductivity of the splice. One end of the female splicing part 32 is fixedly connected to the side of the main foam layer 1. The inner wall of the groove is provided with a wedge groove 321 that matches the wedge block 311. With the cooperation of the male splice 31 and the wedge groove 321, the male splice 31 and the female splice 32 can be connected. Moreover, by setting the conductive elastic sheet 322 made of copper alloy, it has good elasticity and conductivity. When the male splice 31 is inserted into the female splice 32, the conductive protrusion 312 is in close contact with the conductive elastic sheet 322, forming a good conductive path. Since conductive foam is often used for electromagnetic shielding and electrical connection in electronic equipment, the good conductivity of the splice is the key to ensuring that the entire conductive foam can function.

[0031] The protective layer 4 covers the surface of the conductive layer 2. The protective layer 4 is made of a transparent polyurethane film and is bonded to the conductive layer 2 with an adhesive.

[0032] The protective layer 4 is used to protect the conductive layer 2 and improve the wear resistance and aging resistance of the conductive foam. The protective layer 4 is bonded to the conductive layer 2 with an adhesive. The adhesive is a conductive adhesive with good conductivity to ensure good conductivity between the protective layer 4 and the conductive layer 2. By setting multiple uniformly distributed hemispherical micro-protrusions 41 on the surface of the protective layer 4, the contact area between the protective layer 4 and external objects can be reduced to a certain extent, reducing friction and thus improving the wear resistance of the protective layer 4.

[0033] In use, the splicing parts 3 of adjacent conductive foams are connected. The wedge-shaped block 311 of the male splicing part 31 is inserted into the wedge-shaped groove 321 of the female splicing part 32, so that the conductive protrusion 312 and the conductive elastic sheet 322 are in close contact to form a conductive path and complete the splicing. According to the actual needs, the spliced ​​conductive foam is placed in the corresponding position. The elasticity and cushioning performance of the main foam layer 1 are used to make it fit the installation part. The conductive layer 2 plays the role of electromagnetic shielding and electrical connection. The protective layer 4 covers the surface of the conductive layer 2. The micro-protrusions 41 on its surface reduce the contact area with external objects, reduce friction, protect the conductive layer 2, and improve the wear resistance and aging resistance of the conductive foam.

[0034] In summary, this spliced ​​conductive foam, by setting the splicing part 3 and utilizing the cooperation of the wedge block 311 and the wedge groove 321, can flexibly splice conductive foam according to actual needs; at the same time, the conductive protrusions 312 on the male splice 31 are in close contact with the conductive elastic sheet 322 on the inner wall of the female splice 32, ensuring that a good conductive path is formed at the splice, ensuring stable overall conductivity, and effectively improving the applicability of conductive foam in different scenarios and its electromagnetic shielding and electrical connection effects.

[0035] Furthermore, the protective layer 4 is made of a transparent polyurethane film and is bonded to the conductive layer 2 with an adhesive, which can effectively protect the conductive layer 2 and improve the wear resistance and aging resistance of the conductive foam. The micro-protrusions 41 on the surface of the protective layer 4 reduce the contact area with external objects, further reduce friction, extend the service life of the conductive foam, and reduce the performance degradation caused by damage to the conductive layer 2.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spliced ​​conductive foam, comprising a main foam layer (1), a conductive layer (2), a splicing part (3), and a protective layer (4), characterized in that: The main foam layer (1) is made of polyurethane foam material, and the interior of the main foam layer (1) is provided with a plurality of uniformly distributed honeycomb pores (11). The conductive layer (2) is closely attached to the upper and lower surfaces of the main foam layer (1). The conductive layer (2) is woven from conductive fibers. The conductive fibers are made of a composite material of metal fibers and carbon nanotubes. The metal fibers are copper fibers. The splicing part (3) is disposed on the left and right sides of the main body foam layer (1). The splicing part (3) includes a male splicing part (31) and a female splicing part (32). The male splicing part (31) and the female splicing part (32) are respectively disposed on the opposite sides of adjacent main body foam layers (1). The male splicing part (31) includes a wedge block (311). The surface of the wedge block (311) is provided with conductive protrusions (312). The female splicing part (32) includes a wedge groove (321) opened on one side. The inner wall of the wedge groove (321) is provided with a conductive elastic sheet (322). The protective layer (4) covers the surface of the conductive layer (2). The protective layer (4) is made of a transparent polyurethane film and is bonded to the conductive layer (2) with an adhesive.

2. The spliced ​​conductive foam according to claim 1, characterized in that: The upper and lower surfaces of the main foam layer (1) are both planar and smooth.

3. The spliced ​​conductive foam according to claim 1, characterized in that: The male connector (31) is a rectangular strip structure, and the female connector (32) is a rectangular strip groove structure that matches the male connector (31). The wedge groove (321) is adapted to the wedge block (311), and the inclined surface of the wedge groove (321) has the same angle as the inclined surface of the wedge block (311).

4. The spliced ​​conductive foam according to claim 1, characterized in that: The conductive elastic sheet (322) is made of copper alloy, and the wedge block (311) is made of conductive rubber.

5. The spliced ​​conductive foam according to claim 1, characterized in that: The protective layer (4) has a plurality of uniformly distributed micro-protrusions (41) on its surface. The micro-protrusions (41) are hemispherical in shape and have a height of 0.05-0.1 mm.

6. The spliced ​​conductive foam according to claim 1, characterized in that: The conductive layer (2) has a uniform thickness and is firmly bonded to the main foam layer (1) by hot pressing. The edge of the conductive layer (2) is provided with a folded part (21). The folded part (21) folds and extends toward the side of the main foam layer (1) and covers part of the side of the main foam layer (1).

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