TRIPPING DEVICE FOR CIRCUIT BREAKER

The present invention relates to the technical field of low-voltage electrical appliances, and discloses a tripping device for a circuit breaker. The tripping device comprises a static iron core, a moving armature, a coil group, a yoke, an extension spring, and a bimetal sheet; the moving armature and the yoke cooperate with one another, the moving armature is can rotate relative to the yoke, and at the same time, a limiting member is disposed on the movable armature to act on the yoke, so as to form the fastening of the initial position of the movable armature; and the yoke is tightly connected to the static iron core. In one aspect, the present invention retains the coil group in a solenoid tripping device, and by using the characteristics of multiple turns of the coil group, the magnetic induction intensity of the static iron core in a magnetic circuit system can be effectively increased, thereby increasing the suction force between the static iron core and the moving armature, and further ensuring the sho