Internal locking device of vehicle-mounted observation mirror rotary table

The invention relates to the technical field of vehicle-mounted observation mirror rotary tables, in particular to a vehicle-mounted observation mirror rotary table internal locking device which comprises a head shell, a pitching support, a side cover plate and a locking mechanism, the head shell is installed on the pitching support through a rotating shaft, and the side cover plate is installed on the side wall of the pitching support through a screw. A mounting space of the locking mechanism is formed by the side cover plate and an inner cavity of the pitching support, the plug pin is located in the sealed mounting space, and the locking mechanism comprises a locking cylinder seat, a locking motor outer ring, the plug pin, a driving cylinder, a locking motor inner ring, a square guide groove and a limiting seat. A locking cylinder seat is mounted at the shaft end of the head shell rotating shaft through a screw, a locking motor outer ring is mounted in the locking cylinder seat through a screw, and a square