Quick locking device

The utility model discloses a rapid locking device which is composed of a mandrel rod, a friction disc, a protective cover, a pressing plate and a rotary knob and can be applied to equipment with an angle adjusting requirement to achieve rapid locking at any angle. According to the locking device, firstly, a mandrel rod penetrates through the position, with an outer hexagonal hole, of a friction disc, the friction disc is fixed to an equipment box body according to the scale direction, and equipment is erected through a support; the protective cover penetrates through the bolt to be attached to the support, the pressing plate is inserted into the clamping groove of the friction disc in the direction of the boss, and finally the rotary knob is screwed down along the bolt. The purpose of locking equipment is achieved through friction between the protective cover and the friction disc, locking between the pressing plate and the friction disc and friction between the pressing plate and theprotective cover. The lo