Optical pick-up actuator

An optical pick-up actuator comprising:

• a lens holder including an objective lens, a focusing coil and a tracking coil that are respectively wound with wire, and a fixing protrusion;
• magnets installed to respectively face the focusing coil and the tracking coil;
• a wire spring coupled at one end thereof to the fixing protrusion, the wire spring for connecting the focusing coil and the tracking coil;
• a wire holder including a damper material receptacle through which the other end of the wire spring passes, an insert hole for inserting the other end of the wire spring into the damper material receptacle, and a through-hole for allowing the other end of the wire spring to pass through the damper material receptacle, the damper material receptacle for holding a predetermined damper material for enclosing a predetermined portion of the wire spring that is passed therethrough;
• and
• a circuit board formed on a rear surface of the wire holder, for connecting to the other end of the wire spring that passes through the damper material receptacle,
• wherein an injecting hole for injecting damper material is defined in a top surface of the damper material receptacle, the injecting hole being separate from the insert hole and the through-hole.

An optical pick-up actuator comprising:

• a base;
• a wire holder provided at a side of the base;
• a lens holder installed at an upper portion of the base, including an objective lens, and having a fixing protrusion forming an adhesive injecting hole provided on either end thereof;
• a magnetic circuit for allowing the lens holder to move;
• a wire spring with one end thereof passing through the adhesive chamber of the fixing protrusion and coupled to the lens holder with an adhesive, and the other end thereof fixed to the wire holder;
• and
• a damper material receptacle through which the other end of the wire spring passes, for holding a predetermined damper material that absorbs vibrations generated by the movement of the lens holder,
• wherein the fixing protrusion includes a wire through-hole, through which one end of the wire spring passes, which extends through the fixing protrusion, and the adhesive injecting hole is separated from the wire through-hole.

An optical pick-up actuator comprising:

• a base;
• a wire holder provided at a side of the base;
• a wire spring fixed to a side of the wire holder;
• a lens holder installed on an upper portion of the base, and including an objective lens, an adhesive chamber opened at a top surface thereof, and a fixing protrusion provided at either end of the lens holder, the fixing protrusion defining a through-hole for the other end of the wire spring to pass through;
• and
• a magnetic circuit for allowing the lens holder to move,
• wherein the fixing protrusion has all surfaces thereof sealed except for the surfaces in which the adhesive chamber and the through-hole are defined.