Patent ID: 8213100

Claim:
A lens drive device whose shape is substantially rectangular when viewed in an optical axis direction of a lens, the lens drive device comprising: a movable body which holds the lens and which is movable in the optical axis direction; and a drive mechanism for driving the movable body in the optical axis direction; wherein the drive mechanism further comprises: a drive magnet part which is formed in a substantially triangular prism shape and which is disposed at least one of four corners of the lens drive device; a drive coil which is wound around in a substantially triangular tube shape so that its inner peripheral face is oppositely disposed to an outer peripheral face of the drive magnet part through a gap space; and a magnetic member which is disposed on an object to be photographed or imaged side with respect to the drive coil; and wherein the drive magnet part is magnetized so that magnetic flux passing through the drive coil is generated at an opposite position to the drive coil; and wherein the magnetic member is attracted toward an intermediate position of the drive magnet part in the optical axis direction.