Operating mechanism and circuit breaker

The utility model discloses an operating mechanism and a circuit breaker, and relates to the technical field of low-voltage electric appliances. The operating mechanism comprises a shell and a button in sliding connection with the shell, a lock catch piece, a contact seat, a moving contact and a static contact are arranged in the shell, the lock catch piece is rotationally connected with the shell, the contact seat is in sliding connection with the shell, the moving contact is installed on the contact seat, the static contact is fixedly connected with the shell, and the button is in sliding connection with the contact seat. The button drives the moving contact and the static contact to be switched on or switched off, the lock catch piece is buckled with the contact base during switching on, and the lock catch piece is unlocked from the contact base during switching off. The operating mechanism and the circuit breaker can solve the problem of complex structure of the operating mechanism in the prior art. 本实用新型