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Connection structure of outer shell for safe type piezoresistor

A technology of varistor and connection structure, applied in varistor, resistor shell/packaging shell/potting, overvoltage protection resistor, etc., can solve damage to circuit boards and electrical components, explosion of insulating shell 2, High temperature and high pressure gas is difficult to discharge in time and other problems, to achieve the effect of reducing damage, low cost and simple structure

Inactive Publication Date: 2009-04-08
广东省佛山科星电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Its shortcoming is: although this invention is provided with vent hole 1 on the top of insulating shell 2, but the gas of high temperature and high pressure produced suddenly when piezoresistor fails is difficult to discharge in time, when the pressure reaches a certain level, insulating shell 2 It is likely to explode, which will damage the circuit board and electrical components

Method used

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  • Connection structure of outer shell for safe type piezoresistor
  • Connection structure of outer shell for safe type piezoresistor
  • Connection structure of outer shell for safe type piezoresistor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: The insulating housing 2 is in the shape of a container with an opening at the top. figure 2 shown.

Embodiment 2

[0037] Embodiment 2: The insulating housing 2 is in the shape of a container with an opening at the top. Closed on the inner wall of the opening end of the insulating housing 2 is provided with a positioning boss 21, such as image 3 shown.

Embodiment 3

[0038] Embodiment 3: The insulating shell 2 is in the shape of a container with an open top, and is in the shape of a cube. Used to cooperate with the installation of the top cover 3, six grooves 22 are symmetrically arranged at the root of the positioning boss 21; symmetrically distributed barbs 31 are arranged on the inner wall of the top cover 3, and the number of the barbs 31 is the same as that of the pits 22 and they are compatible with each other. ; The position corresponding to the barb 31 on the cover plate of the top cover 3 is also provided with a demoulding hole 33, and the demoulding hole 33 is used to extract the mold core when the barb 31 is processed. Barb 31 is embedded in the recess 22, as Figure 4 ~ Figure 11 shown.

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PUM

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Abstract

The bonded structure includes insulation shell body and top cover. The insulation shell body is in shape of container with top being opened. The top cover is in shape of cap, that is to say cover board is tabulate, and circumference of cover board is raised. Thus, The top cover is in shape of lid. Detachable buckled connection with certain mechanical strength is made on place of coping openings between the body and top cover in order to guarantee top cover will not be separated from the insulation shell body when piezoresistor is in transportation, installation, and normal use. If piezoresistor is in failure, when gas generated in high temperature and in high pressure drastically cannot be discharged in time, then the top cover will be separated from the body effectively before explosion. The invention is applicable to electrical household appliances, products of power supply, computer center, communication area etc, where excessive pressure protection of piezoresistor is needed.

Description

technical field [0001] The invention relates to a piezoresistor, in particular to a shell connection structure of a safety piezoresistor. Background technique [0002] As a protection device for electronic components, the varistor is widely used in various electronic equipment. Under normal voltage conditions, it is equivalent to a capacitor; when the circuit is overvoltage, its internal resistance drops sharply and quickly leads to Through, thus effectively protecting other components in the circuit from damage due to overvoltage. But at the same time, because the current of the varistor increases sharply and the temperature rises significantly when the varistor fails, the insulating and moisture-proof coating layer wrapped outside the varistor ceramic substrate may be ignited, causing the varistor to catch fire and cause a fire. [0003] For this reason, how to prevent the occurrence of fire when the varistor fails is a problem that must be solved in the practical applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/10H01C7/12H01C1/02H01C1/022
Inventor 伦振雄简国楷
Owner 广东省佛山科星电子有限公司