Patent ID: 8014238

Claim:
An optical pickup device comprising: a lens holder to support an objective lens; a supporting unit spaced apart from the lens holder; and one or more suspension members, each having one end fixed to the lens holder and another end supported by the supporting unit, to enable a movement of the lens holder, wherein the supporting unit comprises: a fixing member; one or more coupling portions provided in the fixing member to couple each suspension member therein; a magnetic fluid receiving portion disposed in each of the one or more coupling portions and surrounding the suspension member; magnetic fluid disposed in the magnetic fluid receiving portion to surround a portion of each suspension member; and an excite device disposed in the magnetic fluid receiving portion to directly surround the magnetic fluid to apply a magnetic field to the magnetic fluid, the one or more coupling portions comprising: a first coupling portion having a first elastically deformable coupling agent provided therein; a second coupling portion spaced apart from the first coupling portion and having a second elastically deformable coupling agent provided therein; and a space between the first coupling portion and the second coupling portion having the magnetic fluid provided therein.