Mechanical device for high-definition mobile phone lens

The invention relates to a mechanical device for a high-definition mobile phone lens. The invention aims at overcoming the deficiencies of the prior art and providing a mechanical system which is smart in structure and can realize optical focusing and automatic focusing. The mechanical device comprises a fixed tube and a cam tube which play supporting and positioning roles, as well as a first, second and third group frames, a shell and a motor group, wherein the motor group consists of a focusing motor and a zooming motor, the first and second group frames are arranged in the fixed tube, the cam tube is sheathed on the fixed tube, the first and second group frames are limited and guided by the cam tube and the fixed tube, one end of the third group frame is arranged in the fixed tube, the other end of the third group frame extends out of the fixed tube to be connected with the focusing motor and driven by the focusing motor to move up and down, the cam tube is driven by the focusing motor to rotate, and the first and second group frames are driven by the rotation of the cam tube to do relatively vertical movement.