Patent ID: 7441258

Claim:
An objective lens drive device comprising: an objective lens; a lens holder which holds the objective lens; a fixed side member which supports the lens holder with a plurality of wires in a movable manner; and a drive mechanism for driving the lens holder at least in a focusing direction and a tracking direction, the drive mechanism comprising: a drive magnet provided with a magnetized opposing face in which different magnetic poles are disposed to be adjacent to each other via a magnetic pole boundary portion formed in a roughly U-shape; a focusing drive coil and a tracking drive coil which are opposedly disposed to the magnetized opposing face so as to extend over the magnetic pole boundary portion; and a tilt drive coil for driving the lens holder in a tilt direction, the tilt drive coil being opposedly disposed to the magnetized opposing face at a position where the tilt drive coil overlaps with at least the focusing drive coil or the tracking drive coil in a direction in which the focusing drive coil and the tracking drive coil face the magnetized opposing face; wherein the focusing drive coil and the tracking drive coil are respectively formed to be wound around in a roughly trapezoidal shape having a oblique side part and the focusing drive coil and the tracking drive coil are disposed on approximately the same plane such that both the oblique side parts are adjacent to each other.