Switch module internally provided with surge absorbing and double circuit breaking structure

Abstract

The invention relates to a switch module internally provided with a surge absorbing and double circuit breaking structure, which takes an overcurrent protection switch as a main body and ingeniously builds a surge absorbing and double circuit breaking structure formed by a piezoresistor bare chip and a matched insulation positioning body by using a high temperature resistant shell in an inner space. When a first contact point and a second contact point of a series-connected main power supply of the switch module are in contact connection, the temperature of the piezoresistor bare chip is enabled to rise due to excessive surge or high-voltage lightning strokes and be higher than a melting value of a temperature-sensing binding element with conductivity, the temperature-sensing binding element is enabled to softened, an elastic actuated piece compressed by the solidification of the temperature-sensing binding element is enabled to be loosened and popped up, a push portion is pushed to move so as to enable the first contact point to be separated from the second contact point, a first wiring piece and the second wiring piece form external series connection, the wiring of a main circuitis disconnected, the insulation position body enables the temperature-sensing binding element with conductivity and the elastic actuated piece in the surge absorbing structure to be separated from aconductive surface of the piezoresistor bare chip for power interruption, so that the piezoresistor bare chip is ensured not to be heated at a high temperature, and the safety and reliability in use are improved.

Description

technical field [0001] The invention relates to a switch module with a built-in surge absorbing and double circuit breaker structure, in particular to a switch module that can form an external serially connected main circuit wiring break circuit with the lugs, and make the surge absorbing structure form an internal parallel circuit insulation break circuit , and then constitute the internal and external double circuit breaker structure. Background technique [0002] Figure 1A and Figure 1B It discloses an existing overcurrent protection switch 10, which generally includes: a casing 11, a pressure block 12 is provided at the upper end, and a first lug 12a, a second lug 12b and a third lug are arranged at the bottom. Lug 12c, wherein the first lug 12a is provided with a double metal contact reed 13 and a first contact 131, and the second lug 12b is provided with a second contact 121 that can be in contact with the first contact. ; a linkage 14, one end of which pivot is lo...

AI Technical Summary

Problems solved by technology

However, the varistor will also show functional degradation due to multiple surge shocks during a period of use, resulting in a state of high impedance that should be maintained but conduction under normal conditions, resulting in overheating and fire

Images