Circuit breaker operating mechanism with alarm signal triggering device

The utility model provides a circuit breaker operating mechanism with an alarm signal triggering device, belonging to the technical field of low-voltage electrical appliances. The circuit breaker operating mechanism comprises an operating mechanism side plate, a tripping lever, a lock catch, a handle lever component, an upper connecting rod, a lower connecting rod, a rotating shaft, a main spring and an alarm signal triggering device. One end of the upper connecting rod is connected with the tripping lever, the other end of the upper connecting rod is connected with one end of the lower connecting rod, and the other end of the lower connecting rod is connected with a rotating shaft. The lock catch and the handle lever component are cooperated to form a separable mechanical fastener structure. One end of the main spring is hung on the handle lever component, and the other end of the main spring is hung on a hinge shaft of the upper connecting rod and the lower connecting rod. The circuit breaker operating mech