Patent ID: 8645979
Filing Date: 2014-02-04
Classification: G11B

Abstract:
1. An optical pickup including a lens moving mechanism, the lens moving mechanism comprising: a lens holder holding a lens; a guide member guiding the lens holder; a lead screw having a thread groove on an outer periphery; a motor rotating the lead screw; and a rack gear having a body fixed to the lens holder, claws fitted into the thread groove of the lead screw and an arm connecting the body and the claws, wherein a plurality of projections extending in the rotational axis direction of the lead screw are arranged on the surface of the arm, wherein a plurality of grooves that extend in the rotational axis direction of the lead screw are arranged in the arm, and wherein a plurality of grooves are arranged on a back surface of the arm opposing the grooves extending in the rotational axis direction of the lead screw.