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Horizontal explosion-proof piezoresistor

A piezoresistor and piezoresistor technology, applied in piezoresistors, resistors, resistor parts, etc., can solve problems such as poor effect, looseness, and defective shells, and achieve convenient operation, simple structure, flame suppression effect

Active Publication Date: 2013-02-27
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Put an insulating rubber tube on the outside of the encapsulated varistor product. This method has empty holes on the top and bottom, and the effect is not good.
[0004] 2. Install a phenolic resin shell on the outside of the encapsulated varistor product. The shell is defective during high and low temperature shocks, and because the internal structure of the shell is loose after assembly, the plug-in effect is not good.

Method used

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  • Horizontal explosion-proof piezoresistor
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  • Horizontal explosion-proof piezoresistor

Examples

Experimental program
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Embodiment Construction

[0020] Such as Figure 1~2 Shown is a housing 100 of a piezoresistor, which is a cuboid with an opening on the side. Two lead wire holes 104 are opened on the bottom surface of the cuboid, and two mutually parallel slots 101 are opened between the casing opening and the lead wire holes 104 . Opposite sloped steps 102 are provided on the two side walls near the opening. A positioning plate 103 is provided inside the housing for positioning the main body of the piezoresistor.

[0021] Such as Figure 3-4 As shown, it is a case cover 200, the outer dimensions of the case cover are adapted to the opening of the case, and buckles 202 are provided at the corresponding positions corresponding to the steps of the inclined plane of the case, and two outwardly facing positions are provided at the positions corresponding to the grooves 101. The protruding rib 201 is bent to form an arc lead hole 204 at the bottom of the rib. When the cover 200 is assembled on the housing 100, the rib...

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Abstract

The invention discloses a horizontal explosion-proof piezoresistor which comprises a piezoresistor main body and a shell, wherein, the shell is formed by assembling a cover and a housing, the housing has an opening at one side and an inner cavity for accommodating the piezoresistor main body, the bottom surface of the housing is provided with lead wire bores, the piezoresistor main body is installed into the inner cavity through the opening, the surface of the piezoresistor main body is provided with a first extraction electrode and a second extraction electrode which bend to the lead wire bores, pass through the lead wire bores and extend out from the housing, and a filling cavity is formed between the outer wall of piezoresistor main body and the inner wall of the inner cavity and is filled with an insulation explosion-proof material. When the piezoresistor provided in the invention fails, splitting of fragments in the situation of explosion is avoided, which enables open fire to be effectively inhibited; the shell is of a horizontal structure, which enables the explosion-proof piezoresistor assembled at the back of a circuit board to have a height less than 10mm, thereby meeting current market demands for electric appliances that explosion-proof piezoresistor products should be small, thin and light.

Description

technical field [0001] The invention relates to the technical field of piezoresistors. Background technique [0002] As a kind of pulse surge protector, the varistor is used in the actual circuit, because the varistor is encapsulated with epoxy resin, and it is easy to be broken down when the product fails due to the impact of instantaneous strong voltage or strong current. Or cracking, the product encapsulation layer and porcelain fragments are easy to damage other devices and cause the entire circuit to fail. In order to prevent the device from being damaged when the burst fragments fly, it is necessary to improve its structure to prevent the varistor from bursting and flying. At present, there are the following situations for preventing varistor products from bursting after aging: [0003] 1. Put an insulating rubber tube on the outside of the encapsulated varistor product. This method has empty holes up and down, and the effect is not good. [0004] 2. Install a pheno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/10H01C1/024
Inventor 黄昌中邓佩佳袁冬梅
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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