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Protection box for circuit board and installation method of protection box

A protection box and circuit board technology, applied in the application of non-metallic protective layer, secondary treatment of printed circuit, sealed shell, etc., can solve the problems of uneconomical manufacturing and processing, high time and processing cost, and meet the requirements of guaranteed packaging Effect

Active Publication Date: 2011-10-05
维宁尔瑞典安全系统公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the existing technology needs to perform an additional sealing process on the vent hole after the resin is cured, so the manufacturing process is not economical, and the time and processing costs are too large
[0006] In order to solve the gas emission of the PCB during the resin addition stage, avoid the appearance of air bubbles on the surface after packaging, and achieve the technical problems of simple process and low cost at the same time, it is necessary to provide a new protective box for PCB circuit boards

Method used

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  • Protection box for circuit board and installation method of protection box
  • Protection box for circuit board and installation method of protection box
  • Protection box for circuit board and installation method of protection box

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Embodiment Construction

[0018] figure 1 It is a schematic diagram of the prior art. Such as figure 1 As shown, at first the component 21 of the PCB circuit board 22 is facing up and installed in the upper cavity of the box body 20, that is, the back side of the PCB board 22 faces the lower cavity of the box body 20, and the lower cavity of the box body is provided with an opening 23; then Add resin 24 to the element; then process and cure the resin 24, and the gas 28 in the lower chamber generated during the process is discharged from the opening 23 along the direction of the arrow 25; finally the opening 23 is sealed. This patent discharges the gas generated when the resin is solidified and then seals it. The gas is discharged and moisture gas is prevented from entering the box through the hole. But that patent deals with gases that are produced during the curing phase of the resin.

[0019] Figure 2 to Figure 4B It is a schematic diagram of the first embodiment of the present invention. As sho...

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Abstract

The invention relates to a protection box for a circuit board. The protection box has a general an L-shaped exhaust channel; the air intake end of the exhaust channel is positioned in an air cavity of a box body; and the air exhaust end of the exhaust channel is positioned in a filling cavity of the box body. When a filling material is not filled into the filling cavity, the L-shaped exhaust channel is communicated with the air cavity and the filling cavity through air; and when the filling material is filled into the filling cavity, an air exhaust area is covered and sealed by the filling material. When the protection box is used, the packaging of the circuit board and the sealing of the exhaust channel are finished in a step of filling the filling material, so an additional process of sealing an exhaust hole is eliminated, the box body has a simple structure and is low in cost, and the circuit board is reliable in installation.

Description

technical field [0001] The invention relates to a box structure, in particular to a box structure for installing and protecting a PCB circuit board placed therein. Background technique [0002] A printed circuit board (PCB) is a common electrical connection method, on which various electrical components are usually electrically connected by soldering. With the improvement of precision and the increase of components, the PCB becomes more and more fragile, and it is necessary to provide the necessary protective box to prevent various external impacts and erosion. [0003] Especially for the car crash sensor system, the electrical components including the crash sensor are placed on the PCB, and then the whole PCB is arranged in the box body, and it is sealed and protected by resin. However, this sealing process also generates and retains some gas that cannot be discharged from the box body, resulting in bubbles in the resin or on the surface, thereby affecting the sealing perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/28H05K5/06
Inventor 张科尼古拉斯·尼斯
Owner 维宁尔瑞典安全系统公司
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