Lens actuator and optical pickup apparatus

Abstract

Disclosed in a lens actuator for an optical pickup apparatus, including: a movable holder to hold a lens; and an actuator to move the holder in a tracking direction and a focusing direction, wherein the actuator comprises a yoke and a magnet, and the holder contacts with the yoke before the holder contacts with the magnet, when the holder moves in the tracking direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given hereinbelow and the appended drawings which given by way of illustration only, and thus are not intended as a definition of the limits of the present invention, and wherein;

FIG. 1 is a perspective view of a lens actuator of the present embodiment;

FIG. 2 is a view around the magnet 10A and yoke 8A watching from the direction of arrow II in FIG. 1;

FIG. 3 is a similar view with FIG. 2, showing a modification of the present embodiment;

FIG. 4 is a similar view with FIG. 2, showing another modification of the present embodiment; and

FIG. 5 is a similar view with FIG. 2, showing another modification of the present embodiment.

Claims

1. A lens actuator for an optical pickup apparatus, comprising: a movable holder to hold a lens; andan actuator to move the holder in a tracking direction and a focusing direction,wherein the actuator comprises a yoke and a magnet, and the holder contacts with the yoke before the holder contacts with the magnet, when the holder moves in the tracking direction.

2. The lens actuator of claim 1, wherein a length of the yoke in the tracking direction is longer than a length of the magnet in the tracking direction.

3. The lens actuator of claim 1, wherein an interval between the yoke and the holder in the tracking direction is shorter than an interval between the magnet and the holder.

4. The lens actuator of claim 1, wherein the yoke and the magnet are disposed in an opening of the holder, and a width of the opening in the tracking direction is narrower at a position facing with the yoke than a position facing with the magnet.

5. The lens actuator of claim 4, wherein in the opening, a protrusion is formed at a position facing with the yoke.

6. An optical pickup apparatus comprising: a lens actuator for an optical pickup apparatus, comprising a movable holder to hold a lens, and an actuator to move the holder in a tracking direction and a focusing direction; anda housing to fix the lens actuator,wherein the actuator comprises a yoke and a magnet, and the holder contacts with the yoke before the holder contacts with the magnet, when the holder moves in the tracking direction.

7. The optical pickup apparatus of claim 6, wherein a length of the yoke in the tracking direction is longer than a length of the magnet in the tracking direction.

8. The optical pickup apparatus of claim 6, wherein an interval between the yoke and the holder in the tracking direction is shorter than an interval between the magnet and the holder.

9. The optical pickup apparatus of claim 6, wherein the yoke and the magnet are disposed in an opening of the holder, and a width of the opening in the tracking direction is narrower at a position facing with the yoke than a position facing with the magnet.

10. The optical pickup apparatus of claim 9, wherein in the opening, a protrusion is formed at a position facing with the yoke.