Actuating mechanism of small size circuit breaker

Abstract

The invention provides an operating mechanism of a miniature circuit breaker, which comprises a housing, a handle and a static contact. The internal surface of the housing is provided with a handle shaft. The handle is sleeved on the handle shaft. The invention further comprises a transmission rod, a transmission component and an electromagnetic trip gear. The transmission rod is hinged with the handle and the transmission component. The transmission component comprises a lock latch shaft, a lock latch spring, a lock catch, a moving contact, a jumping latch and a jumping latch spring. The lock latch shaft is arranged on the internal surface and parallel with the handle shaft. The other parts is sleeved on the lock catch shaft in turn. The moving contact and the static contact are matched with each other. A triggering lug boss is arranged on the jumping latch, which is matched with a releasing rod pushed by a moving iron core in the solenoid of the electromagnetic trip gear. The invention can further comprises an adjustable reaction spring used for restricting the operation of the moving iron core, a bimetallic strip, an arc striking tab and an arc suppressing device. The invention has the advantages of less components, simple structure, good stability , low cost, convenient production and installation, safety and adjustable setting current.

Description

technical field [0001] The present invention relates to the technical field of circuit control, in particular to the technical field of circuit breakers, and more specifically to an operating mechanism of a small circuit breaker. Background technique [0002] The existing miniature circuit breaker is composed of operating mechanism system 11, electromagnetic system 12, contact system 13, etc. It has many parts, complex structure and poor stability, which not only increases the cost, but also is inconvenient for production and installation. The speed is easy to produce large sparks due to the structure, the safety of the use process is not high, and the electromagnetic instantaneous tripping current is affected by the instantaneous spring during production and cannot be adjusted, which cannot meet the needs of different setting currents. Contents of the invention [0003] The main purpose of the present invention is to provide an operating mechanism for a small circuit brea...

AI Technical Summary

Problems solved by technology

[0002] The existing miniature circuit breaker is composed of operating mechanism system 11, electromagnetic system 12, contact system 13, etc. It has many parts, complex structure and poor stability, which not only increases the cost, but also is inconvenient for production and installation. The speed is easy to produce large sparks due to the structure, the safety of the use process is not high, and the electromagnetic instantaneous tripping current is affected by the instantaneous spring during production and cannot be adjusted, which cannot meet the needs of different setting currents

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