Patent ID: 8743476

Claim:
A lens with a single detection member shared to perform focusing and zooming operations, comprising: a base; a detection member installed on the base; a focusing unit comprising a focusing group frame slidably installed on the base, a focusing detection board formed on the focusing group frame and corresponding to the detection member, and a focusing driving member installed on the base and utilized to drive the focusing group frame to move between a long-shot end and a close-shot end; and a zooming unit comprising a zooming group frame slidably installed on the base and located above the focusing group frame of the focusing unit, a zooming detection board formed on the zooming group frame and corresponding to the detection member, and a zooming driving member installed on the base and utilized to drive the zooming group frame to move between a wide-angle end and a telephoto end; wherein the focusing driving member of the focusing unit is a motor, and the focusing unit further comprises a screw rod, a screw nut, a plurality of guide rods and a spring, in which the screw rod is connected to the focusing driving member, the screw nut is disposed on the focusing group frame and connectively screwed with the screw rod, the guide rods are fixed on the base and penetratedly disposed on the focusing group frame, and the spring sleeved on one of the guide rods includes two ends ejected between the base and the focusing group frame; wherein the zooming driving member of the zooming unit is a motor, and the zooming unit further comprises a reduction gear train, a cam cylinder concavely arranged with a plurality of cam guide grooves, and a plunge cylinder opened with a plurality of plunge grooves, in which the reduction gear train is connected to the zooming driving member, the cam cylinder is engaged to the reduction gear train, the plunge cylinder is disposed on the base, and the zooming group frame is provided with a plurality of pins which pass through the plunge grooves of the plunge cylinder to embed in the cam guide grooves of the cam cylinder.