Corrosion-resistant electromagnetic shielding cover

Abstract

The utility model discloses a corrosion-resistant electromagnetic shielding case, which comprises a plastic supporting layer, a bonding layer and a carbon-based layer, one end of the plastic supporting layer is connected with the bonding layer, one end of the bonding layer far away from the plastic supporting layer is connected with the carbon-based layer, a conductive structure is arranged in the plastic supporting layer, and the carbon-based layer is connected with the bonding layer. The conductive structure comprises a conductive net which is integrally formed by adding conductive fibers and / or conductive particles into plastic. The technical scheme of the utility model aims to solve the problem that a metal shielding case is easy to corrode, and provides an electromagnetic shielding case which is not easy to corrode, so that the service life of the shielding case is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of shielding covers, and particularly relates to an anti-corrosion electromagnetic shielding cover. Background Art

[0002] An electromagnetic shielding cover is a housing or cover used to protect electronic devices from electromagnetic interference. It can absorb, reflect or shield electromagnetic radiation, effectively isolate electromagnetic radiation and electromagnetic waves, so as to protect the internal electronic components of the device from external electromagnetic interference, and at the same time prevent the device from generating electromagnetic radiation to interfere with other devices.

[0003] At present, the general electromagnetic shielding cover is made of metal materials, but the metal materials are easily affected by oxidation, corrosion, etc. For example, when the metal comes into contact with oxygen, water or other chemical substances, an electrochemical reaction is likely to occur; when there are local heterogeneities on the metal surface, such as defects, microstructural differences, etc., an electrochemical cell will also be formed, and in the presence of an electrolyte, electrolytic corrosion will occur; in addition, the metal will undergo a chemical reaction in a specific chemical environment, resulting in the dissolution and corrosion of the metal surface. Therefore, the electromagnetic shielding cover made of metal is easily corroded, and the shielding effect will be reduced after long-term use, thus affecting the performance of the device. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide an anti-corrosion electromagnetic shielding cover, aiming to solve the problem that the metal shielding cover is easily corroded and improve the service life of the shielding cover.

[0005] To achieve the above object, the utility model provides an anti-corrosion electromagnetic shielding cover, which includes a plastic support layer, a bonding layer and a carbon base layer. One end of the plastic support layer is connected to the bonding layer, and the end of the bonding layer away from the plastic support layer is connected to the carbon base layer. A conductive structure is arranged in the plastic support layer, and the conductive structure includes a conductive network formed by integrally molding conductive fibers and / or conductive particles into plastic.

[0006] In an embodiment of the utility model, the plastic support layer includes a top plate and support bars. The support bars are respectively arranged on the periphery of the top plate to form a shielding space, and the bonding layer and the carbon base layer are sequentially and tightly attached to the outside of the plastic support layer.

[0007] In an embodiment of the utility model, the electromagnetic shielding cover further includes a shielding frame, and the plastic support layer is buckled on the shielding frame.

[0008] In an embodiment of the utility model, a clamping bar is arranged on the side of the support bar close to the shielding space, and a clamping groove is arranged on the periphery of the shielding frame. When the plastic support layer is buckled on the shielding cover, the clamping bar is embedded in the clamping groove.

[0009] In an embodiment of the present utility model, a fixing portion is provided at the bottom of the shielding frame, and a plurality of fixing pins are provided on the fixing portion.

[0010] In an embodiment of the present utility model, the plastic support layer, the bonding layer, and the carbon base layer are each provided with a plurality of heat dissipation holes, and the heat dissipation holes communicate with the shielding space.

[0011] In an embodiment of the present utility model, the carbon base layer is a carbon fiber composite material or a graphene coating.

[0012] The technical solution of the present utility model shapes the shielding cover through the plastic support layer and improves the supporting effect. Then, a carbon base layer with good electrical conductivity is provided outside the plastic support layer, so that the carbon base layer has a good shielding effect. Carbon has good corrosion resistance to most chemical substances. It can resist the erosion of strong corrosive media such as acids and alkalis, and has good thermal stability. It can maintain good electrical conductivity at high temperatures, so that the shielding cover has good corrosion resistance and ensures that the shielding cover still has a good shielding effect after long-term use. In addition, the plastic support layer is formed by plastic injection molding, so that shielding covers of various shapes can be designed according to needs without further machining and can be integrally formed. The conductive structure provided in the plastic support layer can further enhance the electromagnetic shielding effect and also play a role in guiding the electrons in the carbon base layer, so that the carbon base layer contacts the PCB board through the conductive structure and is grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0014] Figure 1 FIG. 1 is a schematic structural diagram of an embodiment of a corrosion-resistant electromagnetic shielding cover of the present utility model;

[0015] Figure 2 FIG. 2 is a partial enlarged view of point A in an embodiment of a corrosion-resistant electromagnetic shielding cover of the present utility model;

[0016] Figure 3 FIG. 3 is a schematic structural diagram of another embodiment of a corrosion-resistant electromagnetic shielding cover of the present utility model.

[0017] Explanation of the reference numerals in the drawings:

[0018] 1. Plastic support layer; 2. Bonding layer; 3. Carbon-based layer; 4. Shielding space; 5. Shielding frame; 31. Support bar; 32. Heat dissipation hole; 311. Card strip; 51. Card slot; 52. Fixing pin.

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The utility model provides a corrosion-resistant electromagnetic shielding cover.

[0022] In an embodiment of the utility model, a corrosion-resistant electromagnetic shielding cover, as shown in the figure, is composed of a plastic support layer 1, a bonding layer 2 and a carbon-based layer 3 which are tightly fitted in sequence, wherein a conductive structure is provided in the plastic support layer 1, and the conductive structure includes a conductive mesh formed by adding conductive fibers and / or conductive particles to the plastic and forming the conductive mesh as a whole, that is, the conductive fibers and / or conductive particles are added to the plastic and injected after being fully stirred, so that the conductive fibers and / or conductive particles are interconnected inside the plastic to form a mesh structure, so that the plastic support layer 1 has a certain conductive function; wherein the plastic support layer 1 supports the shielding cover, because the plastic The support layer 1 is made of plastic injection molding, so that shielding covers of various shapes can be designed as needed without machining and can be formed in one piece. The carbon-based layer 3 arranged on the outside of the plastic support layer 1 has good electrical conductivity, which makes the carbon-based layer 3 have a good shielding effect. Carbon has good corrosion resistance to most chemical substances, ensuring that the shielding cover still has a good shielding effect after long-term use. The conductive structure in the plastic support layer 1 can further enhance the electromagnetic shielding effect, and also play a role in guiding electrons in the carbon-based layer 3, so that the carbon-based layer 3 is in contact with the PCB board through the conductive structure for grounding.

[0023] The bonding layer 2 of the present application is glue with bonding effect, the carbon-based layer 3 can be a carbon fiber composite material or a graphene coating, or it can be graphite or carbon nanotubes, and the plastic in the plastic support layer 1 is polycarbonate PC, engineering plastic ABS or polypropylene PP, the conductive material electric fiber added to the plastic can be stainless steel fiber, aluminum alloy fiber or nickel-plated carbon fiber, and the conductive particles can be nickel powder, carbon powder or graphite.

[0024] Optionally, the plastic support layer 1 includes a top plate and support bars 31. The support bars 31 are respectively arranged on the periphery of the top plate to form a shielding space 4. The bonding layer 2 and the carbon base layer 3 are sequentially and closely attached to the outside of the plastic support layer 1, covering the electronic components in the shielding space 4 to shield electromagnetic waves.

[0025] Optionally, as shown in the figure, the electromagnetic shielding cover further includes a shielding frame 5. The plastic support layer 1 is buckled on the shielding frame 5, and the shielding frame 5 is fixed on the PCB board. When maintenance is required, the plastic support layer 1 can be detached from the shielding frame 5, facilitating the maintenance of the electronic components in the shielding space 4. The connection method between the plastic support layer 1 and the shielding frame 5 can be that a plurality of small grooves are provided on the peripheral side of the shielding frame 5, and a plurality of convex bumps are provided on the support bars 31 of the plastic support layer 1. When the plastic support layer 1 is buckled on the shielding frame 5, the convex bumps are fitted into the small grooves, so that the two are in close contact, preventing poor contact from causing the plastic support layer 1 and the carbon base layer 3 not to be grounded, which affects the shielding effect.

[0026] Optionally, a clamping strip 311 is provided on the side of the support bar 31 of the plastic support layer 1 close to the shielding space 4, and a clamping groove 51 is provided on the periphery of the shielding frame 5. When the plastic support layer 1 is buckled on the shielding cover, the clamping strip 311 is embedded in the clamping groove 51, thereby fixing the plastic support layer 1 on the shielding frame 5 and ensuring a tight combination.

[0027] Optionally, a fixing part is provided at the bottom of the shielding frame 5, and a plurality of fixing pins 52 are provided in the fixing part. The shielding frame 5 is fixed by welding the fixing pins 52 to the PCB board, realizing the grounding of the plastic support layer 1 and the carbon base layer 3, and transmitting the electrons of the carbon base layer 3 to the PCB board. After the shielding frame 5 is produced, the fixing pins 52 can be installed when it is mounted on the PCB board, that is, a counterbore can be provided in the fixing part, the fixing pins 52 are placed in the counterbore and then welded to the PCB board, and the part of the fixing pins 52 in the counterbore can be further fixed with glue.

[0028] Optionally, as shown in the figure, a plurality of heat dissipation holes 32 are correspondingly provided in the plastic support layer 1, the bonding layer 2, and the carbon base layer 3. The heat dissipation holes 32 of the plastic support layer 1, the bonding layer 2, and the carbon base layer 3 are correspondingly communicated to the inside of the shielding space 4. A large amount of heat will be generated during the operation of the electronic components. If the temperature in the shielding space 4 is too high and the heat is not dissipated in time, it will affect the operating performance of the electronic components. The heat dissipation holes 32 can transfer the heat to the outside of the shielding space 4 in time, thereby reducing the temperature inside the shielding space 4. However, the aperture of the heat dissipation holes 32 should not be opened too large, as it is easy for electromagnetic waves to enter through the heat dissipation holes 32.

[0029] Preferably, the carbon-based layer 3 is a carbon fiber composite material or a graphene coating. The carbon fiber has a high tensile strength and is not easy to deform or collapse, so it can well protect the internal electronic components. The carbon fiber has a very low density and is light in weight, which meets the requirements of electronic products with strict weight requirements. In addition, the carbon fiber is corrosion-resistant, will not rust, and will not be corroded by chemicals, which can increase the service life of the shielding cover. Graphene also has the corrosion resistance and lightness of carbon fiber, as well as its firmness, and also has good electrical conductivity, which can make the electromagnetic shielding cover have excellent electromagnetic shielding effect while making the electromagnetic shielding cover less prone to corrosion, thereby increasing its service life.

[0030] Optionally, a flange is provided on the side of the plastic support layer 1 facing away from the shielding space 4 , and a groove is provided at the lower end of the flange. The plastic support layer 1 can be removed from the shielding frame 5 by inserting a tool into the groove and lifting it upward.

[0031] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A corrosion-resistant electromagnetic shielding cover, characterized in that, It includes a plastic support layer, a bonding layer and a carbon base layer. One end of the plastic support layer is connected to the bonding layer, and one end of the bonding layer away from the plastic support layer is connected to the carbon base layer. A conductive structure is provided in the plastic support layer, and the conductive structure includes a conductive network formed by integrally molding conductive fibers and / or conductive particles into plastic.

2. The corrosion-resistant electromagnetic shielding cover according to claim 1, characterized in that, The plastic support layer includes a top plate and support bars. The support bars are respectively arranged on the periphery of the top plate to form a shielding space. The bonding layer and the carbon base layer are sequentially and closely attached to the outside of the plastic support layer.

3. The electromagnetic shielding cover with corrosion resistance according to claim 2, characterized in that, The electromagnetic shielding cover further includes a shielding frame, and the plastic support layer is buckled on the shielding frame.

4. The corrosion-resistant electromagnetic shielding cover according to claim 3, characterized in that, A clamping strip is provided on one side of the support bar close to the shielding space, and a clamping groove is provided on the periphery of the shielding frame. When the plastic support layer is buckled on the shielding cover, the clamping strip is embedded in the clamping groove.

5. An anti-corrosion electromagnetic shielding cover according to claim 4, characterized in that, A fixing part is provided at the bottom of the shielding frame, and a plurality of fixing pins are provided on the fixing part.

6. The corrosion-resistant electromagnetic shielding cover according to claim 1, characterized in that, The plastic support layer, the bonding layer and the carbon base layer are all correspondingly provided with a plurality of heat dissipation holes, and the heat dissipation holes communicate with the shielding space.

7. A corrosion-resistant electromagnetic shielding cover according to any one of claims 1 to 6, characterized in that, The carbon base layer is a carbon fiber composite material or a graphene coating.

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