Patent ID: 6034940
Filing Date: 2000-03-07
Classification: G11B

Abstract:
An optical pickup actuator which comprises:a lens holder having an objective lens for focusing a laser beam on a recording surface of an optical recording medium and a penetrating hole for placing the objective lens;a pair of bobbins for being contacted with both side surfaces of the lens holder, each of the bobbins having a focusing coil and a tracking coil, the tracking coil and the focusing coil being directly wound around a body of each of the bobbins in orthogonal directions to each other, and a winding axis of the focusing coil being parallel with an optical axial direction of the objective lens;magnet keeping means having a bottom plate spaced under the lens holder, a pair of yokes formed upwardly on the bottom plate and formed at corresponding positions of outsides of both of the bobbins, a pair of magnets formed on inside surfaces of the yokes for giving magnetic flux to the focusing coil and the tracking coil in order to move the lens holder; andlens holder suspension means for floating the lens holder, the lens holder suspension means having a suspension supporting plate formed upwardly on the bottom plate under the lens holder, a the suspension PCB fixed at the suspension supporting plate, a pair of coil PCBs fixed at both of the other side surfaces of the lens holder and connected with both ends of the tracking coil and the focusing coil, and suspension wires for floating the lens holder from the suspension supporting plate, the suspension wires having both ends connected with suspension PCB and coil PCBs.