Patent ID: 7428112

Claim:
An objective lens driving device which is movable along a tracking direction comprising: a lens holder movably holding an objective lens; a damper base consisting of one member; and a suspension member elastically supporting said lens holder with respect to said damper base, said suspension member comprising a plurality of suspension wires disposed on both sides of said damper base and said lens holder; wherein said damper base includes first supporting portions for supporting first ends of said suspension wires via adhesive agents, respectively, and said lens holder includes second supporting portions for supporting second ends of said suspension wires, respectively; wherein said damper base includes damper portions disposed between said first supporting portions and said second supporting portions, and each of said damper portions has a groove filled with damper material through which a corresponding one of the suspension wires is inserted; wherein the first supporting portions are provided at both lateral sides of the damper base, and the second supporting portions are provided at both lateral sides of the lens holder; wherein said lateral sides of the damper base extend along a tangential direction that is perpendicular to the tracking direction, and said lateral sides of the lens holder also extend along the tangential direction that is perpendicular to the tracking direction; wherein the second supporting portions are spaced apart from the first supporting portions by a first distance along the tangential direction, and the damper portions are spaced apart from the first supporting portions toward the second supporting portions by a second distance along the tangential direction such that an empty space is provided between the damper portions and the first supporting portions; and wherein said second distance is in a range between one-fifth and two-fifths of said first distance.