Circuit breaker and handle locking device thereof

Abstract

The present invention provides a handle locking device for a circuit breaker and a circuit breaker equipped with the same. The handle locking device is provided with a lock cap composed of flexible material, a pair of arm members parallel to each other with an interval, and a connecting member connected with the pair of the arm members in its middle, wherein the pair of the arm members and the connecting member are integrated to a H shape; an inner side faces facing to the arm members on the front end part side of the lock cap are provided with protuberances respectively conjoined with wall scooping holes of a handle part of the handle, and the end part of a basis end part side arm member of the lock cap is provided with a fixture part embedded in an opening part of the cap and fixed withthe opening part; pressing the end part of basis end part arm member of the lock cap inwards to expand an interval between the two arm members locating on the front end part of the front end side armmember to clip the handle part of the handle of the circuit breaker from two sides, thereby, the basis end part arm member is conjoined with the opening part of the cap, and the handle is locked on abreaking position or a closing position.

Description

technical field [0001] The present invention relates to a handle lock device for locking an operating handle of a circuit breaker such as a wiring circuit breaker and an earth leakage protection circuit breaker in an open circuit state and a closed circuit state, and a circuit breaker provided with the handle lock device device. Background technique [0002] The handle lock device of the circuit breaker locks (fixes) the operating handle in the closed (on) position or the off (off) position to prevent the circuit breaker from being accidentally switched on and off so that it cannot be operated. [0003] Figures 13A-13C to Figures 19A-19B The structure of the conventional handle lock device shown in patent document 1 is shown. [0004] Figures 13A-13C It is a figure showing the structure of the handle lock cover of the conventional handle lock device, wherein Figure 13A for the front view, Figure 13B for Figure 13A A side view of A, Figure 13C for Figure 13A B-...

AI Technical Summary

Problems solved by technology

Therefore, the lock cover cannot ensure sufficient rigidity and elastic strength, and the lock cover attached to the handle part will easily fall off from the handle (handle part) only by applying a small external force in the unpadlocked state. problems with reliability

In addition, since it is a structure that cannot be locked only with the lock cover, in order to lock the handle reliably, it is usually necessary to combine it with a lock clip and hang a padlock, and there is also a problem that it is difficult to use.

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