Operation mechanism of small-size breaker

Abstract

The invention discloses an operation mechanism of a small-size breaker. The operation mechanism comprises a shell, a handle, a U-shaped connection rod, a contact support, a jumping pin, a lock catch, a pull rod, a movable contact, a metal sheet and an electromagnetic device; a rotary shaft is inserted in the shell; the middle of the contact support is hinged onto the rotary shaft; a downwards-inclined long slot hole is formed in the upper end of the contact support; one end of the U-shaped connection rod is hinged to and fixed with the inner end of the handle; the other end of the U-shaped connection rod slides in the long slot hole; a V-shaped slot capable of forming touch abutting with the end, sliding in the long slot hole, of the U-shaped connection rod is correspondingly formed in the upper end surface of the lock catch, so the linkage with the lock catch can be realized by the sliding of the U-shaped connection rod in the long slot hole; the end, linked with the lock catch, of the U-shaped connection rod is changed to be the movable end, so the separating probability of the breaker in the fast switching on process is greatly reduced, the switching off action of the breaker is faster and the operation is more stable and more reliable.

Description

technical field [0001] The invention relates to a small circuit breaker, in particular to an operating mechanism of the small circuit breaker. Background technique [0002] At present, the operating mechanism of a miniature circuit breaker usually includes a housing, a handle, a contact bracket, a jumper, a lock, a moving contact, etc., the outer end of the handle is usually the operating end, and the inner end of the handle is Hinged on the shell, in order to make the rotation of the handle drive the corresponding rotation of the contact bracket, jumper and lock, so as to realize the closing and opening operation of the circuit breaker, the existing structure is between the handle and the lock. A U-shaped connecting rod that can be linked is arranged between the lock buckles, one end of the U-shaped connecting rod is hingedly fixed to the inner end of the handle, and the other end of the U-shaped connecting rod is also hingedly fixed to the lock buckle, which is equal to B...

AI Technical Summary

Problems solved by technology

In addition, none of the locks on the existing miniature circuit breakers has a return spring, which will also increase the probability of the circuit breaker slipping during the rapid closing process

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