Patent ID: 7515366

Claim:
A lens module, comprising: at least one lens; a lens barrel for receiving the at least one lens therein, the lens barrel having at least three protrusions provided thereon; a motor having a stator and a rotator, the stator surrounding the rotator therein and being defined with coils thereon; a barrel holder having an inner space for receiving the lens barrel therein and an annular socket for receiving the rotator therein, the rotator surrounding the lens barrel; a ring-shaped cam member attached to the rotator, the cam member having at least three sloping portions each having a lower end and a higher end sloping toward the lower end, the at least three sloping portions being arranged to be adjacent to one another in an end to end fashion; and at least one elastic member for applying a force on the lens barrel toward the cam member; wherein the at least three protrusions abut against and on the respective at least three sloping portions, the at least three protrusions and the rotator are arranged on a same side of the cam member, the cam member and the rotator are magnetically driven by the stator to be rotatable relative to the barrel holder between a first position where the at least three protrusions abut against and on the lower ends of the at least three sloping portions and a second position where the at least three protrusions abut against and on the higher ends thereof, thus the lens barrel and the at least one lens are movable relative to the cam member in the barrel holder.