CN201947597U - Shielding device - Google Patents

Abstract

The utility model discloses a shielding device, which comprises: a first PCB board; a second PCB board placed opposite to and parallel to the first PCB board; a first shielding frame and a second shielding frame, connected to the first PCB board connected with the second PCB board to form a closed cavity; and a connector located between the first PCB board and the second PCB board and connected with the first PCB board and the second PCB board. The utility model reduces the overall thickness of the PCB board, saves the overall area of the PCB board, and reduces the use cost of a separate shielding cover.

Description

shielding device

technical field

The utility model relates to the communication field, in particular to a shielding device.

Background technique

With the development and widespread use of large-scale integrated circuits, EMI has become a problem that cannot be underestimated. As an electromagnetic anti-interference device, the use of shielding covers is becoming more and more common. The shielding cover is to surround the interference source of components, circuits, assemblies, cables or the whole system with a shielding body to prevent the interference electromagnetic field from spreading outward; to surround the receiving circuit, equipment or system with a shielding body to prevent them from being subjected to external electromagnetic fields Impact.

The material of the shielding case is usually made of 0.2mm thick stainless steel and nickel nickel, and the combination of the shielding frame and the shielding case is generally used. Doing so not only increases the occupied area but also increases the occupied thickness.

Utility model content

In order to overcome the defect of increasing the occupied area and thickness of the shielding frame in the existing shielding case scheme, the utility model provides a shielding device, which simultaneously reduces the occupied area and thickness of the shielding frame of the shielding case.

In order to achieve the above purpose, according to one aspect of the present utility model, a shielding device is provided.

The shielding device according to the present invention comprises: a first PCB board; a second PCB board placed opposite to and parallel to the first PCB board; a first shielding frame and a second shielding frame connected to the first PCB board and the second PCB board , forming a closed cavity; and a connector, located between the first PCB board and the second PCB board, connected with the first PCB board and the second PCB board.

Further, the connector is located in the airtight cavity.

Further, the connector is located outside the airtight cavity.

Further, the shielding device further includes: a third shielding frame and a fourth shielding frame connected to the first PCB board and the second PCB board to form a second airtight cavity; the connector is located in the second airtight cavity.

Further, the first shielding frame, the second shielding frame, the first PCB board and the second PCB board are connected by welding.

Further, the third shielding frame, the fourth shielding frame, the first PCB board and the second PCB board are connected by welding.

Adopting the shielding device of the present utility model reduces the occupied area and thickness of the shielding frame of the shielding case, reduces the overall thickness of the printed circuit board (Printed Circuit Board, referred to as PCB) board, saves the overall area of the PCB board, and reduces the cost of a separate shielding case. The cost.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the sectional view of the shielding device of the utility model embodiment;

Fig. 2 is a cross-sectional view of the shielding device of the preferred embodiment 1 of the present invention;

Fig. 3 is a cross-sectional view of the shielding device according to the preferred embodiment 2 of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The embodiment of the utility model provides a shielding device. 1 is a cross-sectional view of a shielding device according to an embodiment of the present invention, including a first PCB board 11 , a second PCB board 12 , a first shielding frame 13 , a second shielding frame 14 and a connector 15 . It is described in detail below.

The second PCB board 12 is placed opposite and parallel to the first PCB board 11; the first shielding frame 13 and the second shielding frame 14 are connected with the first PCB board 11 and the second PCB board 12 to form a closed cavity; the connector 15 , located between the first PCB board 11 and the second PCB board 12 , and connected to the first PCB board 11 and the second PCB board 12 .

In the related art, the shielding case and the shielding frame in the shielding device increase the occupied area and thickness. In the embodiment of the utility model, the first PCB board and the second PCB board have respective devices, and the first shielding frame, the second shielding frame, the first PCB board, and the second PCB board form a closed cavity to play a shielding role. The first PCB board is equivalent to the shielding cover of the device on the second PCB board, and the second PCB board is also equivalent to the shielding cover of the device on the first PCB board, which can save a separate shielding cover, and can also be used as a ground to enhance airtightness, shielding.

In addition, on the basis of fixing the second PCB, the first PCB is also fixed by the shielding frame.

In the embodiment of the present invention, the connector is used for electrical connection between the first PCB board and the second PCB board.

Preferably, the connector 15 is located within a closed cavity.

Preferably, the first shielding frame 13 , the second shielding frame 14 , the first PCB board 11 and the second PCB board 12 are connected by welding.

The utility model also provides two preferred embodiments:

Preferred embodiment one

Fig. 2 is a cross-sectional view of the shielding device according to the preferred embodiment 1 of the present invention.

Preferably, the connector 15 is located outside the airtight cavity, which can reduce the interference of the radiation generated by the connector on the devices in the first PCB board and the second PCB board.

Preferred embodiment two

Fig. 3 is a cross-sectional view of the shielding device according to the preferred embodiment 2 of the present invention.

Preferably, the above-mentioned shielding device further includes a third shielding frame 16 and a fourth shielding frame 17, which are connected to the first PCB board 11 and the second PCB board 12 to form a second airtight cavity; the connector is located between the second airtight cavity Inside.

In this preferred embodiment, a third shielding frame and a fourth shielding frame are arranged on both sides of the connector, so as to prevent the connector from generating interference such as radiation.

Preferably, the third shielding frame 16 , the fourth shielding frame 17 , the first PCB board 11 and the second PCB board 12 are connected by welding.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A shielding device, characterized in that, comprising: The first printed circuit board (PCB); The second PCB board is placed opposite and parallel to the first PCB board; The first shielding frame and the second shielding frame are connected to the first PCB board and the second PCB board to form a closed cavity; and The connector is located between the first PCB board and the second PCB board, and is connected with the first PCB board and the second PCB board. 2. The shielding device according to claim 1, wherein the connector is located in the sealed cavity. 3. The shielding device according to claim 1, wherein the connector is located outside the airtight cavity. 4. The shielding device according to claim 1, further comprising: The third shielding frame and the fourth shielding frame are connected to the first PCB board and the second PCB board to form a second airtight cavity; The connector is located in the second closed cavity. 5. The shielding device according to any one of claims 1 to 4, wherein the first shielding frame, the second shielding frame, the first PCB board and the second PCB board pass through Solder connection. 6. The shielding device according to claim 4, wherein the third shielding frame, the fourth shielding frame, the first PCB board and the second PCB board are connected by welding.

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