Optical pickup
AssigneeHitachi Media Electronics Co., Ltd.
InventorsYasushi KINOSHITA, Jun HATO, Kazuhiro TODORI
Life of this patent
Estimating the term…
Abstract
An optical pickup includes a lens moving mechanism constructed of a lens, a lens holder holding the lens, a guide member guiding the lens holder, a lead screw including a thread groove, a motor rotating the lead screw, and a rack gear including a body fixed to the lens holder and claws fitted into the thread groove of the lead screw, in which an arm connecting the body and the claws of the rack gear is formed so that the shape of a cross section perpendicular to the rotational axis direction of the lead screw is a convex shape, a recess shape or a wave-shape.
Claims13
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.
An optical pickup, comprising:
- a laser beam source;
- an optical system;
- a photo-detector;
- a lens moving mechanism, which moves a lens of the optical system;
- and
- a case, which mounts the laser beam source, the optical system, the photo-detector and the lens moving mechanism;
- wherein
- the lens moving mechanism includes a lens holder, a guide member for the lens holder, a lead screw having a thread groove on an outer periphery, a motor connected to the lead screw, and a rack gear including a body fixed to the lens holder, claws fitted into the thread groove of the lead screw, an arm connecting the body and the claws, the arm being provided with a plurality of projections extending in the rotational axis direction of the lead screw on a surface of the arm.
Dependencies are inferred from the claim text.