Switch module with built-in surge absorption linkage circuit breaking structure

Abstract

The invention relates to a switch module with a built-in surge absorption linkage circuit breaking structure, in particular to a cocooning protection structure which can be quickly expanded for circuit breaking when surge absorption is excessive; when the surge is excessive or high voltage enables the temperature of a piezoresistor to rise instantly or burst, expanded graphite is forced to be synchronously and linearly expanded due to quick heat absorption, and the expanded graphite is guided by the filled space to form asilk-thread-shaped cross-woven cocoon-shaped body structure, coats the piezoresistor, forms a fireproof isolation layer, synchronously expands outwards by taking the cocoon-shaped body as a center along with the temperature rise, and generates enough pushing and jacking force when the total expansion volume of the expanded graphite reaches a set expansion space moving distance, so that the push part is pushed to move linearly, the push rod forces the first contact point on a double-closing metal sheet to be separated from the second contact point, a first lug plate and a second lug plate form an open circuit to stop supplying power to the piezoresistor and the electrical equipment at the rear end of the piezoresistor, and the electrical safety is ensure; and the manufacturing is convenient, and the product precision and reliability can be improved.

Description

technical field [0001] The invention relates to a switch module with a built-in surge absorbing linkage break structure, in particular to a cocoon protection structure that can quickly expand and break when the surge absorbs too much. Background technique [0002] Figure 1A and Figure 1B It is an existing overcurrent protection switch 10, which generally includes: a housing 11, a pressing block 12 is provided at the upper end, and a first lug 12a, a second lug 12b and a first lug 12a are arranged at the bottom end. Three lugs 12c, wherein the first lug 12a is provided with a double metal contact reed 13 and a first contact 131, the upper part of the second lug 12b is provided with a second contact that can be in contact with the first contact 121; a link 14, one end of which is pivotally located at the bottom of the briquetting block 12, and the other end links the free end of the double metal contact reed 13, so that the pressing of the briquetting block 12 drives the do...

AI Technical Summary

Problems solved by technology

However, the structure and process of pushing the pushing part 750 away by softening the temperature-sensitive joint 720 to loosen the elastic actuator 730 and push the displacement of the pushing part 750 are relatively complicated, which is not conducive to automatic production, and the degree of softening of the temperature-sensitive joint 720 is difficult to control , leading to a reduction in the reliability and accuracy of the product

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