Operating mechanism of miniature circuit breaker

Abstract

The invention relates to an operating mechanism of a miniature circuit breaker. The operating mechanism comprises a contact carrier, a jump catch, a lock catch, a moving contact, a U-shaped rod and a handle, wherein a shaft pin which is hinged to a circuit breaker casing is arranged on the contact carrier, a jump catch groove is formed in the contact carrier, the jump catch is arranged in the jump catch groove in a sliding way, a lock catch hole is formed in the contact carrier, the lock catch is hinged with the lock catch hole, a lock rod is formed at one end of the lock catch, a step by which the jump catch is pressed against is formed at the front end of the lock rod, a lock catch torsional spring which is tend to bounce up is arranged between the outer side of the lock catch and the outer side of the contact carrier, a contact shaft is formed on the contact carrier, the moving contact is hinged to the contact shaft, a contact torsional spring is sleeved on the contact shaft, the two ends of the contact torsional spring are respectively connected to the moving contact and the contact carrier, and the handle is connected with the jump catch by the U-shaped rod. The operating mechanism has the advantages of simple structure, few mechanical parts, simplicity in assembly and higher stability due to the adoption of the sliding mode of the jump catch in the groove.

Description

technical field [0001] The invention relates to an assembly of a circuit breaker, in particular to an operating mechanism of 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. The miniature circuit breaker mainly controls the opening and closing of the circuit through the operating mechanism. The operating mechanism in the existing miniature circuit breaker is mainly composed of a lock, a jumper, a bracket, a "U"-shaped connecting rod and a handle. There is a tension spring, the moving contact is fixed on the bracket; the jumper is clamped on the upper right corner of the bracket and hinged with the bracket, the lock is hinged at the left middle of the bracket and the upper end of the lock is locked with the jumper, and the jumper It is connected with the handle through a "U" type connecting rod. The operating mechanism ...

AI Technical Summary

Problems solved by technology

The operating mechanism of this small circuit breaker has the following defects: 1. The jumper is hinged on the support and is easy to fall, especially in the assembly process, which affects the production efficiency of the product, and the jumper will also fall when the circuit breaker is disassembled for maintenance. Dropped, inconvenient to repair

3. The lock reset spring is inconvenient to install, the lock reset torsion spring is prone to fatigue and loses elasticity, and the service life is short

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