CN215421477U

CN215421477U - Gasket for electromagnetic shielding

Info

Publication number: CN215421477U
Application number: CN202121720622.3U
Authority: CN
Inventors: 张涛
Original assignee: Shenzhen Tianyueda Technology Co ltd
Current assignee: Shenzhen Tianyueda Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-04
Anticipated expiration: 2031-07-27

Abstract

The utility model provides a gasket for electromagnetic shielding, which comprises a first gasket and a second gasket, wherein the first gasket is provided with a wire mesh gasket, two end faces of the wire mesh gasket are respectively provided with a conductive rubber layer, one end face of the conductive rubber layer is contacted with the end face of the wire mesh gasket, and the other end face of the conductive rubber layer is provided with a conductive plastic layer; the structure of second packing ring is the same with first packing ring structure, is provided with adapting unit between first packing ring and the second packing ring, the utility model discloses the practicality has good electromagnetic shield effect, and waterproof rust-resistant losing, and the quality is light, easy to assemble.

Description

Gasket for electromagnetic shielding

Technical Field

The utility model relates to the technical field of gaskets for electromagnetic shielding, in particular to a gasket for electromagnetic shielding.

Background

Electromagnetic shielding requires good grounding as well as good conductive continuity of the shield. In order to meet the requirement of electromagnetic compatibility, materials with high conductivity are often used as shielding materials, such as copper plates, copper foils, aluminum plates, aluminum foils, steel plates or metal plating layers, conductive coatings.

In practical applications, the electromagnetic shielding effectiveness depends to a greater extent on the structure of the housing, i.e. the continuity of the electrical conduction. Seams, openings, etc. on the case are leakage sources of electromagnetic waves. Cables running through the cabinet are also a major cause of reduced shielding effectiveness. The method for solving the electromagnetic leakage of the gap of the chassis is to use an electromagnetic sealing gasket at the gap. The electromagnetic gasket is a conductive elastomeric material that maintains conductive continuity at the gap. The electromagnetic leakage influence on the screw connection position of the case, the fixing position of the device in the case and the entrance of the case cable passing through the case is also important, and the electromagnetic shielding at the positions is not ignored.

In the prior art, gaskets are usually used at the joints to achieve the electromagnetic shielding effect, but common gaskets such as metal gaskets, woven wire mesh gaskets and the like can only achieve the electromagnetic shielding effect and cannot meet the requirements of sealing, water resistance, corrosion resistance and the like in different environments.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the objects of the present invention is to provide a gasket for electromagnetic shielding, which effectively shields the electromagnetic leakage of the gap at the joint and simultaneously has good sealing, water-proof and corrosion-proof functions.

The purpose of the utility model is realized by adopting the following technical scheme: the gasket for electromagnetic shielding is provided, electromagnetic shielding and water and rust prevention at a connecting hole are effectively guaranteed, and the gasket comprises a first gasket and a second gasket, wherein a wire mesh gasket is arranged on the first gasket, conductive rubber layers are arranged on two end faces of the wire mesh gasket, one end face of each conductive rubber layer is fixed with the end face of the wire mesh gasket, and a conductive plastic layer is arranged on the other end face of the fixed end face of each conductive rubber layer and the wire mesh gasket; the second gasket has the same structure as the first gasket.

Furthermore, the middle wire mesh gasket is a metal woven wire mesh with good electromagnetic shielding effect,

furthermore, the wire mesh gasket and the conductive rubber layer, and the rubber layer and the conductive plastic layer are bonded through a conductive waterproof adhesive. The projection surfaces of the wire mesh gasket, the conductive rubber layer and the conductive plastic layer are all annular. The cross section of the conductive rubber layer is of a D-shaped structure.

Furthermore, the first gasket and the second gasket are detachably connected, the connection mode is a buckle type connection or a thread type connection, the first gasket and the second gasket are fixed at a screw hole or a cable hole, the installation is convenient, the shielding effect is good, and the waterproof and anti-rust effects are achieved.

The utility model has the beneficial effects that:

the design of the utility model adopts a laminated structure, meets the electromagnetic shielding requirement under the complex environment, and particularly provides good electromagnetic shielding effect and simultaneously has the functions of water resistance and corrosion resistance under the precise environment. The woven wire mesh gasket has good mechanical strength, wear resistance, heat resistance, cold resistance and excellent electromagnetic shielding effect. The conductive rubber has good tolerance to higher closing force, and adapts to the pressure by changing the shape of the conductive rubber rather than the volume, so that the effect of sealing and waterproofing is achieved. The conductive plastic is used as a shell material, so that the shielding effect is good, the corrosion resistance is good, the service life is long, and the weight is light. The mode that two-layer packing ring passes through buckle screw thread etc. to be connected fixedly about adopting has guaranteed shielded leakproofness stability, simple to operate, and easy operation need not to take off the packing ring and can change dismantlement screw, cable.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of the present embodiment 1;

FIG. 2 is a schematic structural diagram of the present embodiment 1;

FIG. 3 is a sectional view of the present embodiment 1;

fig. 4 is a schematic structural view of the fastener of the connecting device in this embodiment 1;

FIG. 5 is a schematic view of the structure of the screw thread of the connecting device in the embodiment 2;

in the figure: 1. a wire mesh gasket; 2. a conductive rubber layer; 3. a conductive plastic layer; 21. a first gasket; 22. a second gasket; 11. buckling; 12. a card slot; 13. an internal thread; 14. and (4) external threads.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1:

as shown in fig. 1 to 3, a gasket for electromagnetic shielding includes a first gasket 21 and a second gasket 22. The first gasket 21 is provided with the wire mesh gasket 1. The wire mesh gasket 1 is a gasket woven by a metal wire mesh, and has a good electromagnetic shielding effect. The metal wire mesh meeting the requirements is selected under different requirements, and the shielding effects of different requirements are met. The two end faces of the screen washer 1 are respectively provided with a conductive rubber layer 2, and one end face of the conductive rubber layer 2 is contacted with the end face of the screen washer 1. The conductive rubber gasket is generally made of conductive silicone rubber. When the conductive silicone rubber gasket is used for filling a gasket, the conductive silicone rubber strip with the D-shaped cross section is selected, and the conductive silicone rubber strip has good compressibility and can prevent electromagnetic shielding performance from being influenced by shearing force. The conductive rubber layer 2 and the corresponding end face of the contact end face of the screen gasket 1 are provided with the conductive plastic layer 3, the conductive plastic is a functional polymer material which is prepared by mixing resin as a base material and a conductive additive in a plastic processing and forming mode, and compared with the traditional material, the conductive plastic is corrosion-resistant, long in service life and light in weight, and is very suitable for being used as a gasket. The wire mesh gasket 1 and the conductive rubber layer 2, and the conductive rubber layer 2 and the conductive plastic layer 3 are bonded through the conductive waterproof adhesive, so that the waterproofness and the conductivity are ensured. The wire mesh gasket 1, the conductive rubber layer 2 and the conductive plastic layer 3 are all annular and can be fixed by bolts or cables. The first gasket 21 and the second gasket 22 are detachably connected, and the first gasket 21 and the second gasket 22 are fixed to the connecting holes and two sides of the cable hole, so that the installation is convenient.

As shown in fig. 4, the gasket for electromagnetic shielding in embodiment 1 includes a first gasket 21 and a second gasket 22, the first gasket 21 and the second gasket 22 are connected to each other through a buckle 11, the buckle 11 is disposed at the lower end of the first gasket 21, a clamping groove 12 corresponding to the buckle is disposed at the upper end of the second gasket 22, the buckle 11 is disposed on a seam allowance, and a female buckle sealant is used for reinforcing the rib position. The first gasket 21 and the second gasket 22 are fixed at two ends of a screw hole and a cable hole through the buckle 11, and screws or cables can be directly installed, so that the novel cable seat is practical and convenient.

Example 2:

as shown in fig. 5, unlike embodiment 1, a first washer 21 and a second washer 22 are coupled to each other by a bolt, and the first washer 21 has a female screw 13 structure at a lower end thereof and a corresponding male screw 14 structure at an upper end thereof. The first gasket 21 and the second gasket 22 are fixed at two ends of the screw hole and the cable hole through threads, and screws or cables can be directly installed, so that the novel cable seat is practical and convenient. The working principle of the embodiment is that two identical gaskets which have good electromagnetic shielding effect and are waterproof and rust-proof are fixed on two sides of the connecting hole and the cable hole in a detachable connection mode, such as buckle connection and thread connection, and the installation is simple and convenient.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A gasket for electromagnetic shielding, comprising a wire mesh gasket (1), a conductive rubber layer (2), a conductive plastic layer (3), characterized in that: the wire mesh type electric shock absorber is characterized by further comprising a first gasket (21) and a second gasket (22), wherein a wire mesh gasket (1) is arranged on the first gasket (21), conductive rubber layers (2) are arranged on two end faces of the wire mesh gasket (1), one end face of each conductive rubber layer (2) is fixed with the end face of the wire mesh gasket (1), and a conductive plastic layer (3) is arranged at one end, back to the wire mesh gasket (1), of each conductive rubber layer (2); the second washer (22) has the same structure as the first washer (21).

2. A gasket for electromagnetic shielding according to claim 1, wherein: the wire mesh gasket (1) and the conductive rubber layer (2) as well as the conductive rubber layer (2) and the conductive plastic layer (3) are bonded through a conductive waterproof adhesive.

3. A gasket for electromagnetic shielding according to claim 2, wherein: the projection surfaces of the wire mesh gasket (1), the conductive rubber layer (2) and the conductive plastic layer (3) are all in an annular structure.

4. A gasket for electromagnetic shielding according to claim 3, wherein: the cross section of the conductive rubber layer (2) is in a D-shaped structure.

5. A gasket for electromagnetic shielding according to claim 1, wherein: the first gasket (21) and the second gasket (22) are detachably connected.

6. A gasket for electromagnetic shielding according to claim 5, wherein: the first washer (21) and the second washer (22) are connected in a snap-in connection mode.

7. A gasket for electromagnetic shielding according to claim 5, wherein: the connection mode between the first washer (21) and the second washer (22) is a threaded connection.