Miniature circuit breaker operating mechanism and miniature circuit breaker

Abstract

The invention provides a miniature circuit breaker operating mechanism and a miniature circuit breaker. The miniature circuit breaker operating mechanism comprises a moving contact, which is rotatably arranged on a housing, and has an opening position separated from a static contact and a closing position contacted with and connected to the static contact; a push button, which is arranged on the housing in a translational manner, and is in rotary connection with the moving contact, wherein the push button pushes the moving contact to rotate to the opening position or the closing position to realize opening and closing action; and a locking structure, which is used for locking the push button in the closing state. Compared with a scheme where a handle can drive the moving contact to rotate through a U-shaped push rod and a jump buckle in the prior art, the provided scheme is characterized in that, with the coordination of the locking structure, the translational push button can directly drive the moving contact to realize the opening and closing action, and the push button can drive the moving contact to rotate without a support assembly formed by a contact support, the jump buckle and a locking buckle. The miniature circuit breaker operating mechanism has the advantages of simple transmission structure, fast opening and closing speed and low production and maintenance cost.

Description

technical field [0001] The invention relates to the technical field of small circuit breakers, in particular to a small circuit breaker operating mechanism and a small circuit breaker. Background technique [0002] Miniature circuit breakers refer to protective appliances installed on terminal distribution lines, mainly used for overload and short circuit protection of lines and electrical equipment. Miniature circuit breakers are generally composed of operating mechanism, electromagnetic tripping mechanism, thermal tripping mechanism, arc extinguishing mechanism, etc. The operating mechanism refers to the components used to open and close the circuit breaker. The operating mechanism must not only ensure the reliable closing of the circuit breaker, but also ensure the rapid opening of the circuit breaker under fault conditions. The performance of the operating mechanism directly affects the miniature circuit breaker. function. [0003] As shown in 8, the traditional small c...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the handle of the operating mechanism in the prior art needs to drive the moving contact through a transmission member such as a bracket assembly, resulting in slow opening and closing speed of the circuit breaker, complicated transmission structure, and difficult production and maintenance. The problem of high cost, thereby providing a miniature circuit breaker operating mechanism, and a miniature circuit breaker with the miniature circuit breaker operating mechanism

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