Switch module internally provided with surge absorbing and circuit breaking structure

Abstract

The invention discloses a switch module internally provided with a surge absorbing and circuit breaking structure. With an over current protection switch as a main body, a high temperature-resisting shell is used for delicately building a surge absorbing and circuit breaking structure inside the space. When a first contact point of the switch module is in contact connection with a second contact point of the same and the temperature rise, caused by surge excess or high-voltage lightning strokes, of a voltage dependent resistor is higher than a melting value of a temperature-sensitive binding element, the temperature-sensitive binding element is forced to be softened, an elastic actuated piece compressed by the temperature-sensitive binding element in a solid way is loosened and popped up, a push portion is pushed to displace, the first contact point on a bimetallic sheet is disengaged from the second contact point to form a break circuit, and power supply to the voltage dependent resistor and electric appliances behind the resistor is stopped to achieve power utilization safety. A traditional structure in which a tightening band is used to tighten a compression spring is eliminated, a modularized design in which the temperature-sensitive binding element compresses the elastic actuated piece in the solid way directly is used, and further, manufacturing is convenient, the product accuracy is improved, and the reliability is improved.

Description

technical field [0001] The invention relates to a switch module with a built-in surge absorption and circuit breaker structure, in particular to an overcurrent protection switch with a built-in surge absorber and circuit breaker protection structure. Background technique [0002] Figure 1A and Figure 1B An existing overcurrent protection switch 10 is disclosed, which generally includes: a casing 11, a pressing block 12 is provided at the upper end, and a first terminal piece 12a, a second terminal piece 12b and a third terminal piece are provided at the bottom end A piece 12c, wherein the first wiring piece 12a is provided with a double metal contact reed 13 and a first contact 131, and the upper part of the second wiring piece 12b is provided with a second contact 121 that can be in contact with the first contact; A linkage 14, one end of which is pivotally located at the bottom of the pressure block 12, and the other end is linked to the free end of the double metal con...

AI Technical Summary

Problems solved by technology

However, according to the investigation, the structure and manufacturing process of the compression spring 73 tightened in a ring shape by the belt 74 are relatively complicated, which is not conducive to automatic production, and the degree of tightness of the belt 74 is not easy to control, resulting in a decrease in the reliability and accuracy of the product.

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