OPTICAL PICKUP ACTUATOR HAVING TRIAXIAL DRIVING FUNCTION

摘要

PURPOSE: An optical pickup actuator having a triaxial driving function is provided to maintain a certain gap by enlarging a thrust constant without changing the size of a gap between magnets and a coil, thereby compensating aberration due to distortion of a disk. CONSTITUTION: A blade(10) includes an objective lens(11) installed on one side, tracking and focusing coils(12,13) inside, and a plurality of magnets(15) for a tilt attached to a rear surface. A yoke plate(20) includes internal and external yokes(22) to attach magnets(21) for realizing tracking and focusing motion. A plurality of suspension wires(30) are electrically connected with the tracking and focusing coils on both sides of the blade. A wire holder(40) includes a fixing part(41) for supporting one ends of the suspension wires and a yoke insertion part(42) for inserting a yoke(23) for a tilt, and a PCB(Printed Circuit Board)(43) electrically connecting the suspension wires. A coil(50) for a tilt is guided to an external circumference of the yoke insertion part for generating electromagnetic force to the magnets for the tilt.