Patent ID: 8285132

Claim:
A voice coil motor comprising: a shell, and a driving module received in the shell for driving a lens module, the driving module comprising: at least one magnet defining a first receiving cavity, the at least one magnet attached on an inner surface of the shell; a movable unit, the movable unit movably received in the first receiving cavity, the movable unit comprising a movable barrel and a coil wrapped around an outer sidewall of the movable barrel, the movable barrel being configured for receiving the lens module therein, a central axis of the movable barrel being coaxial with an optical axis of the lens module, the movable barrel comprising a first receiving portion, a central axis of the first receiving portion being parallel with the optical axis; a spring plate, the spring plate comprising a first fixed portion, a second fixed portion, and a spring connecting portion connecting the first fixed portion to the second fixed portion, the first fixed portion being fixed on the movable barrel, the second fixed portion comprising a fixed block, the fixed block comprising a first locating lateral face facing away from the first fixed portion; a bottom base, the second fixed portion being fixed on the bottom base, the bottom base comprising a receiving block, the receiving block of the bottom base comprising a second receiving portion, the receiving block of the bottom base also comprising a second locating lateral face engaged with the first locating lateral face, and a guiding post connecting the movable unit to the bottom base, one end of the guiding post received in the first receiving portion, and the other end of the guiding post received in the second receiving portion, the movable barrel being moveable along the guiding post.