| 摘要 |
PROBLEM TO BE SOLVED: To view display means for contact position from outside, and to maintain a handle lock state while keeping it easy to attach and detach an operation handle.SOLUTION: An operation member for opening and closing a contact opening/closing mechanism of a circuit breaker comprises a rotary member provided rotatably in an instrument body and an operation handle member extended from the rotary member to outside the instrument body, and a handle lock member 2 fixing the operation handle member in a contact open state in which the operation handle member is inverted on the instrument body or in a contact closed state in which the operation handle member is laid down on the instrument body is formed by successively providing a first frame part 21 that the laid-down operation handle member penetrates and a second frame part 22 exposing an opening/closing representation indicative of the open state or closed state to outside the instrument body. |
