Operation mechanism of low-voltage circuit breaker

Abstract

The invention discloses an operation mechanism of a low-voltage circuit breaker, which comprises a first connecting rod, a second connecting rod, a first hinged shaft, a second hinged shaft and a third hinged shaft; the first connecting rod is connected with one end of the second connecting rod through the second hinged shaft; the other end of the first connecting rod is connected with a handle hinge through the first hinged shaft; the other end of the second connecting rod is connected with a hinge at the other end of a rocker through the third hinged shaft; a restraint groove formed on a trip restrains the second hinged shaft 21 to only slide in the groove; one end of an energy storage spring is connected with a frame or an element fixedly connected with the frame, while the other end is connected with the third hinged shaft; and the first hinged shaft can transit between a first stop position and a second stop position to and fro, so that the operation mechanism is converted between a first stable state corresponding to the first stop position and a second stable state corresponding to the second stop position. The operation mechanism has compact and reasonable structure, smallvolume, strong function, good performance, easy production and manufacture and low cost.

Description

technical field [0001] The invention relates to an operating mechanism of a low-voltage circuit breaker, in particular to an operating mechanism of a low-voltage miniature circuit breaker. Background technique [0002] A low voltage circuit breaker is a protective device commonly used in electrical systems. The miniature circuit breaker is a kind of low-voltage circuit breaker. Its characteristic is that the length, width, and height are required to meet the modular standards. Its width is the width of the standard module or a multiple of the width of the standard module. In the relevant international standards , Miniature circuit breakers are generally installed on DIN standard rails. [0003] At present, there are many types of operating mechanisms for miniature circuit breakers, and the structural forms are also various. Typically, such as the miniature circuit breaker disclosed in Chinese Patent No. ZL89101031 or ZL01273291, the structure and operation process of the o...

AI Technical Summary

Problems solved by technology

The components in these existing operating mechanisms are directly installed on the housing of the circuit breaker, and the mechanism parts are complicated, so the installation and debugging are very difficult, the manufacturing is difficult, and the production cost is high; and the operating mechanism is limited by its four-bar linkage structure and layout , the structure is too dispersed, which is not conducive to assembly, and the wire path is long, so the volume of the circuit breaker has to be made larger

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