Patent ID: 7359631

Claim:
A lens driving device for moving a lens, comprising: cylindrical first and second stators for generating magnetic fields in accordance with electric current flowing therein; a hollow disk-shaped rotor disposed coaxially with said first and second stators, said rotor being adjacent to said first and second stators in an axial direction thereof, and said rotor being rotated in accordance with the magnetic fields generated by said first and second stators; a rotary barrel disposed inside said first and second stators and said rotor so as to be coaxial therewith, said rotary barrel rotating in association with rotation of said rotor; a cylindrical lens holder disposed inside said rotary barrel so as to be coaxial therewith, said lens holder holding said lens such that said axial direction coincides with an optical axis of said lens; and a moving mechanism for converting rotational movement of said rotary barrel into linear movement in said axial direction to transmit the rotational movement to said lens holder, said moving mechanism moving said lens holder in said axial direction upon rotation of said rotary barrel.