Patent ID: 7869313

Claim:
An optical pickup actuator comprising: a moving unit including a lens holder on which an objective lens is positioned; a set of suspension wires to movably support the lens holder on a base of the optical pickup actuator, each suspension wire having one end fixed to a side of the lens holder, and the other end fixed to connection portions positioned at opposite sides of a tilt spring, the tilt spring including a middle portion, between the connection portions, to be connected to a holder positioned on the base, and bridge portions to connect the middle portion to each of the connection portions, the bridge portions flexibly deforming when the moving unit is driven; and a magnetic circuit installed at the lens holder and the base to drive the moving unit, wherein the magnetic circuit comprises a set of magnets and a plurality of coils to enable quadaxial driving in focusing, tracking, radial tilt, and tangential tilt directions, and wherein a subset of the set of suspension wires is used to apply current to the plurality of coils, and wherein the tilt spring comprises a printed circuit board on which a lead pattern electrically connected to the subset of the set of suspension wires that is used to apply the current to the coils is formed, and wherein a thickness of the tilt spring is less than 0.6 mm.