Dental bent handpiece head locking structure capable of being quickly disassembled

The utility model discloses a dental bent handpiece head locking structure capable of being quickly detached. Relates to the technical field of dental treatment instruments. Comprising a first clamping pin, a protruding position, a spring, a fastening nut and a positioning nut. The machine head is connected with the transmission shaft through a first clamping pin; the protruding position is fixedly arranged at one end of the outer wall of the transmission shaft, the spring, the fastening nut and the positioning nut are sequentially arranged in the shell from left to right, a stepped hole is formed in the shell, a first U-shaped groove is formed in the right side of the inner wall of the shell, a limiting pin and a spiral groove are arranged on the outer wall of the fastening nut, the limiting pin slides in the first U-shaped groove, and the spiral groove is arranged in the shell. The protrusion rotates on the right side of the interior of the shell and is rotatably arranged in the spiral groove in a matched m