Patent ID: 7107602

Claim:
An objective-lens driving apparatus, comprising: an objective lens for light-converging light on the recording surface of an optical disk, a lens holder for holding said objective lens, a focusing coil and tracking coils mounted onto said lens holder, plural supporting members for supporting a movable unit in a movable manner in a focusing direction and a tracking direction with respect to a fixed unit, said movable unit including said lens holder, a yoke member including a magnetic substance, and plural permanent magnets arranged in parallel to said tracking direction and at least with respect to both ends of said movable unit, wherein, with respect to one side of said movable unit parallel to said tracking direction, said permanent magnets are arranged with respect to both ends of said movable unit, and with respect to the other side of said movable unit parallel to said tracking direction, at least one of said permanent magnets is arranged at a position which is one of close to the center of said movable unit and at the center of said movable unit.