Patent ID: 8238049

Claim:
A lens drive device which is formed in a substantially quadrangular shape when viewed in an optical axis direction of a lens, comprising: a movable body which holds the lens and is movable in the optical axis direction; a fixed body which movably holds the movable body in the optical axis direction; and a drive mechanism for driving the movable body in the optical axis direction; wherein the drive mechanism comprises: first drive magnets which are respectively disposed on four side faces of the lens drive device; a second drive magnet for restraining inclination which is disposed on at least one of four corners of the lens drive device; and a drive coil which is wound around in a substantially octagonal shape when viewed in the optical axis direction and is disposed so as to face the first drive magnets and the second drive magnet; and wherein one of the following two is satisfied: magnetic flux passing through the drive coil at one corner of the four corners of the lens drive device is different from magnetic fluxes passing through the drive coil at other three corners of the four corners of the lens drive device; and magnetic fluxes passing through the drive coil at two corners adjacent to each other of the four corners of the lens drive device are different from magnetic fluxes passing through the drive coil at other two corners of the four corners of the lens drive device.