Shielding case and circuit board fixing structure

A fixed structure, circuit board technology, applied in the direction of magnetic field / electric field shielding, electrical components, etc., can solve the problems of interference sensitive circuits, shielding cover can not achieve the expected shielding effect, etc., to achieve the effect of preventing electromagnetic wave interference

Inactive Publication Date: 2014-11-12
NANNING FUGUI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this design, since the shielding cover is only connected to the surface of the circuit board, the shielding cover can only shield the electromagnetic interference on the surface of the circuit board.
However, external interference energy can still enter the circuit board from the side of the circuit board through the gap between the inner layer of the circuit board and interfere with the sensitive circuit, so that the shielding cover cannot achieve the expected shielding effect

Method used

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  • Shielding case and circuit board fixing structure
  • Shielding case and circuit board fixing structure
  • Shielding case and circuit board fixing structure

Examples

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Embodiment Construction

[0029] refer to figure 1 , figure 2 and image 3 , The shielding case and the circuit board fixing structure 100 provided in a specific embodiment of the present invention is used to fix the shielding case 3 on the circuit board 1 .

[0030] In this embodiment, the circuit board 1 is a four-layer circuit board including a first signal layer 111 , a ground layer 13 , a power layer 19 and a second signal layer 171 .

[0031] In other embodiments, the number of layers of the circuit board 1 can also be set according to the performance requirements of the product, for example, six layers, eight layers or other layers. A plurality of signal layers, a plurality of ground layers and a plurality of power layers can be arranged in the circuit board 1, such as Figure 4 As shown, the circuit board is a six-layer circuit board, including a first signal layer 111 disposed on the first surface 11, a second signal layer 171 disposed on the second surface 17, and a two-layer ground layer...

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Abstract

The invention provides a shielding case and circuit board fixing structure. The shielding case and circuit board fixing structure comprises a circuit board and a shielding case. The circuit board comprises a sensitive circuit and a ground layer and is provided with a groove communicated with the ground layer. The shielding case shields the sensitive circuit and extends into the groove in the circuit board to be in electric connection with the ground layer. According to the shielding case and circuit board fixing structure, the situation that electromagnetic waves enter the circuit board from the side faces of the circuit board through gaps between layers in the circuit board and interfere in the sensitive circuit can be effectively prevented.

Description

technical field [0001] The invention relates to a structure for preventing electromagnetic interference, in particular to a structure for fixing a shielding case and a circuit board. Background technique [0002] The application of electronic products is more and more extensive, and as one of the important components of electronic products, the design of circuit boards is particularly important. A large number of electronic components are arranged on the circuit board, and some electronic components are sensitive circuits. When these electronic components are working, electromagnetic waves generated outside will affect the normal operation of the electronic components. In the prior art, a shielding cover is usually provided at the sensitive circuit to shield the interference of the sensitive circuit from external electromagnetic waves, and at the same time prevent the electromagnetic wave generated by the sensitive circuit from radiating outward. The shielding case is usual...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H05K9/00
Inventor何裕华
OwnerNANNING FUGUI PRECISION IND CO LTD