Interlocking device for secondary plug-in and circuit breaker chamber door plate of switch cabinet

The invention relates to an interlocking device for a secondary plug-in and a circuit breaker chamber door plate of a switch cabinet, which belongs to the technical field of cabinet door interlocking. The interlocking device comprises a door interlocking shaft, one end of the door interlocking shaft penetrates through a door cross beam positioning plate and then is sleeved with a first elastic piece, the other end of the door interlocking shaft penetrates through a baffle fixed to the switch cabinet and then is rotationally connected with one end of a transmission bent plate, and the middle of the transmission bent plate is rotationally connected with a positioning plate. A secondary plug-in pressing plate is slidably connected to the positioning plate, and a first notch is formed in the side, facing the transmission bent plate, of the secondary plug-in pressing plate. The beneficial effects are that mutual locking of the secondary plug-in and the circuit breaker chamber door plate is realized, the circuit br