Manual operation mechanism of circuit breaker

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to a circuit breaker manual operation mechanism which comprises a rotating handle, a shell, an interlocking rod, a linkage plate assembly, a transmission rod and a spring, and the interlocking rod, the linkage plate assembly, the transmission rod and the spring are arranged in the shell. The linkage plate assembly comprises a linkage plate, the rotating handle is rotationally arranged on the shell and is in driving connection with the linkage plate, and the rotating handle and the linkage plate assembly rotate synchronously; the interlocking rod is pivotally arranged on the shell and is in driving fit with the linkage plate; one end of the transmission rod is in driving connection with the interlocking rod, the other end of the transmission rod is connected with one end of the spring, and the other end of the spring is in limiting fit with the shell; the interlocking rod is switched between a first position and a second position through reciprocating swing, the spring respectively applies a first acting force F1 and a second acting force F2 to the transmission rod, and the transmission rod enables the interlocking rod to be respectively kept at the first position and the second position; the circuit breaker manual operation mechanism is simple in structure and good in working reliability.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a hand-operated mechanism of a circuit breaker. Background technique [0002] The domestic small three-box market has been on the rise. More and more fields, such as civil / commercial buildings, machinery, rail transit, factory buildings, etc., require supporting distribution boxes for power distribution protection. [0003] With the improvement of users' safety awareness, more and more hand-operated side-opening small power distribution cabinets appear on the market, and gradually become one of the major categories of small three boxes; Clear requirements, such as the box body must be designed with a side door, and the molded case circuit breaker must be equipped with a special manual mechanism. [0004] However, the existing circuit breaker manual operating mechanism mostly has the following deficiencies: [0005] 1. The structure of the existing manual operati...

AI Technical Summary

Problems solved by technology

[0005] 1. The structure of the existing manual operating mechanism of the circuit breaker is complicated, and the positioning of the interlock lever is unstable and unreliable;

[0006] 2. The existing hand-operated mechanism of the circuit breaker is only suitable for drawer cabinets, and cannot be used in side-opening boxes such as small three boxes;

[0007] 3. The existing manual operating mechanism of the circuit breaker cannot be used when the cabinet door of the box is opened or closed at the same time

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