Patent ID: 7411875

Claim:
An optical pickup comprising: an objective lens; and an actuator including: a plurality of elastic wires; a fixed side support member; and a movable side lens holder provided with the objective lens, wherein: one-end portions of the plurality of elastic wires are fixed to the movable side lens holder; another-end portions of the plurality of elastic wires are fixed to the fixed side support member; the plurality of elastic wires are arranged in a manner inserted through an inside of a layer of a damper material filling a space provided in the fixed side support member; the space is formed by a groove shaped cavity which is formed on a side face of the fixed side support member and which extends forward and backward, while a front part of the groove shaped cavity is provided with an opening surrounded by a groove shaped surface which forms the groove shaped cavity and by a columnar section which passes vertically the outside portion of the front end part of the groove shaped surface; the wires of the same number are arranged symmetrically on both right and left sides of the actuator, while a plurality of the wires arranged on the same side of the actuator are inserted through the inside of the layer of the damper material filling one of the groove shaped cavities, and while the groove shaped cavity is divided into chambers each corresponding to each wire by partitions provided in a rear part of the columnar section in a manner separated from the columnar section by a gap; and the damper material filling the space contacts closely with the groove shaped surface and the columnar section within the opening, while the layer of the damper material continues across from a vertical passage space formed between the columnar section and the partitions to the chambers.