DRIVING STRUCTURE FOR AXIAL-TYPE OPTICAL PICK-UP ACTUATOR

摘要

PURPOSE: A driving structure for an axial-type optical pick-up actuator is provided for enhancing an electromagnetic levitation force and driving sensitivity of a lens holder. CONSTITUTION: An optical pick-up actuator includes a lens holder(40) having an object lens(42) fixed on an upper surface of the same and a shaft hole(50) in an optical axial direction, and a yoke(10) fixing a center shaft(14) inserted into a shaft hole(50). The yoke(10) is fixed with a magnet(20) having a first region(M1) in which a polar is divided into left and right directions, a second region(M2) formed on an upper portion of the first region(M1) at a boundary in which the pole N is formed in the upper direction of the pole S, and a third region(M3) formed below the first region(M1) at a boundary in which the pole S is formed in the lower direction of the pole N.