Patent ID: 8040620

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 is provided with the lens and which is movable in the optical axis direction; a drive mechanism for driving the movable body in the optical axis direction, comprising: a substantially triangular prism-shaped drive magnet part which is disposed in at least one of four corners of the lens drive device; and a drive coil which is wound around a substantially triangular tube shape and whose inner peripheral face is oppositely disposed to an outer peripheral face of the drive magnet part through a gap space; wherein the drive magnet part is magnetized so that magnetic flux passing through the drive coil is generated at a position facing the drive coil; and wherein the drive magnet part is provided with two drive magnet pieces which are formed in a substantially triangular prism shape and are disposed to be superposed on each other in the optical axis direction, and opposite faces of the two drive magnet pieces to each other in the optical axis direction are magnetized in a same magnetic pole.