Operating mechanism and miniature circuit breaker

Abstract

The invention discloses an operating mechanism and a miniature circuit breaker. The problems that false tripping of the conventional miniature circuit breaker easily happens, or the conventional miniature circuit breaker is insensitive to trip, the assembling difficulty is high and the failure rate is high are mainly solved. The operating mechanism is characterized in that a bracket (3) has an integral structure; a central shaft sleeve (6) provided with a central hole and a trip hinged shaft (7), a latch resetting torsion spring mounting shaft (8) and a moving contact mounting shaft (9) which are distributed in a triangle shape are arranged on the bracket (3); a trip (2) is a body piece; a moving contact torsion spring (22) is wound outside the moving contact mounting shaft (9); a mounting seat (18) on the trip (2) is sleeved outside the central shaft sleeve (6) and can rotate relative to the central shaft sleeve (6); and a latch resetting torsion spring (23) is wound on the latch resetting torsion spring mounting shaft (8). By the operating mechanism, the structure of the bracket is changed, and the operating mechanism is compact in structure and convenient to mount; and moreover, the miniature circuit breaker is convenient to assemble and is sensitively and reliably tripped.

Description

technical field [0001] The invention relates to an electric switch, in particular to an operating mechanism and a small circuit breaker. Background technique [0002] A miniature circuit breaker is a commonly used electrical switch, mainly used in various places such as industry, commerce, and residential buildings. Existing small circuit breakers are mainly composed of housings, moving contacts, static contacts and operating mechanisms. The operating mechanisms are mainly composed of locks, jumpers, brackets, "U"-shaped connecting rods and handles. The brackets are made of metal. Stamping forming, there is a tension spring between the bottom of the bracket and the shell, the moving contact is fixed on the bracket; the jumper is also stamped and formed by metal, the jumper is clamped on the upper right corner of the bracket and hinged with the bracket, and the lock is hinged In the middle of the left side of the bracket and the upper end of the lock is locked with the jumpe...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the background technology, the present invention provides an operating mechanism and a small circuit breaker installed with the operating mechanism, which mainly solves the problems that the existing small circuit breakers are prone to false tripping or insensitive tripping, difficult assembly and failure high rate problem

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