Circuit breaker

Abstract

The invention discloses a circuit breaker which comprises a shell, an operating handle is rotationally arranged on the shell; a moving contact, a static contact, a lock catch, a U-shaped connecting rod and a tripping mechanism are arranged in the shell. The middle part of the moving contact is rotationally connected with the shell; the lower end of the moving contact is positioned on one side of the static contact; the upper end of the moving contact is provided with a moving contact carrying port. The middle part of the lock catch is rotationally connected with the shell; a lock catch carrying opening is formed in one end of the lock catch; one end of the U-shaped connecting rod is inserted and fixed on the operating handle; the other end of the U-shaped connecting rod correspondingly passes through the lock catch carrying port and the moving contact carrying port. When the operating handle rotates towards the closing direction, the inclined surface of the lock catch carrying port correspondingly constitutes a closed end limiting the other end of the U-shaped connecting rod dropping out from the moving contact carrying port. Compared with the prior art, the circuit breaker provided by the invention has the advantages that the structure is greatly simplified, the production cost is reduced, the operation reliability is improved, and the tripping and unlocking time is shortened,so that the breaking capacity of the circuit breaker is remarkably improved.

Description

technical field [0001] The invention relates to a circuit breaker. Background technique [0002] A circuit breaker generally includes a housing on which an operating handle is rotated, and a handle reset torsion spring is connected to the operating handle. The housing is provided with a moving contact, a static contact, and a tripping mechanism. At the same time, the operating There is also an operation linkage mechanism between the handle and the moving contact. The existing operation linkage mechanism usually includes multiple components such as a lock buckle, a U-shaped connecting rod, a jumper, a contact bracket, and some other connecting rods. The production cost is high, and the more components are linked and matched, the lower the reliability and the longer the reaction time required for tripping and unlocking, thus affecting the breaking capacity of the circuit breaker. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention p...

AI Technical Summary

Problems solved by technology

[0002] A circuit breaker generally includes a housing on which an operating handle is rotated, and a handle reset torsion spring is connected to the operating handle. The housing is provided with a moving contact, a static contact, and a tripping mechanism. At the same time, the operating There is also an operation linkage mechanism between the handle and the moving contact. The existing operation linkage mechanism usually includes multiple components such as a lock buckle, a U-shaped connecting rod, a jumper, a contact bracket, and some other connecting rods. The production cost is high, and the more parts are linked and matched, the lower its reliability and the longer the reaction time required for tripping and unlocking, thus affecting the breaking capacity of the circuit breaker

Images