JPH0248980Y2 - - Google Patents

Description

[Detailed description of the invention] Field of application This invention relates to a structure for adjusting and fixing the inclination of an optical pickup for recording or reading information on an optical disk using a laser beam. be.

Prior Art Optical pickups are installed so that the optical axis of the objective lens is perpendicular to the optical disk surface, and the optical pickup is adjusted so that abnormal vibrations do not occur at the installation part even under high-speed tracking control. Although it must be securely fixed, there is a problem in that the structure becomes complicated in order to satisfy these adjustments and fixations.

Purpose This invention aims to provide a mounting mechanism with a simple structure that allows easy adjustment of the optical axis when installing an optical pickup and ensures secure fixation after adjustment.

Configuration: In this invention, a leaf spring forms a first plane part, one end of which is fixed to a slider to form a fixed end, the other end forms a first free end, and the plate spring forms a first flat part, and the other end forms a first free end. A side end intermediate to the free end is bent perpendicularly to the first flat part to form a second flat part, and the end forms the second free end, and the first free end An intermediate stand is fixed to the first free end so that the intermediate stand and the first free end are fixed to each other after being adjusted to move relative to the slider, a pick-up mount is fixed to the second free end, and the intermediate stand is fixed to the second free end. The pick-up fixing table and the second free end are fixed to each other after being moved and adjusted relative to the intermediate table, and each of the movement adjustment directions has an inclination angle adjustment direction that crosses each other with respect to the slider, that is, the fixed end. The optical axis of the optical pick-up fixed to the pick-up mount can be appropriately adjusted and fixed in any direction of inclination.

Embodiments Hereinafter, embodiments of this invention will be described based on the drawings. In FIGS. 1 and 2, the slider 1 is
It is slidably attached to rails 2a and 2b, and is adapted to be driven back and forth along the surface of an optical disk (not shown) in its tracking control direction.
One end 5 of the first flat portion 4 of the leaf spring 3 is fixed to the slider 1 by screws 6a, 6b, and 6c to form a fixed end, and the other end 7 is a first free end. A second flat part 8 is bent from the first flat part 4 at one side midway between the fixed end 5 and the first free end 7 and extends in a perpendicular direction.
, the extended end 9 of which constitutes the second free end. An intermediate stand 10 is fixed near the first free end 7 by screws 11a, 11b, and 11c. On the sides of the intermediate stand 10, an inclined surface 12a extending downward to the right in the figure and an inclined surface 12b extending downward to the left form two inclined surfaces opposite to each other with respect to a plane parallel to the optical disk surface. The first adjustment means is this inclined surface 1
2a, 12b and screws 13, 14,
One screw 13 and the other screw 14 are attached to the slider 1
For example, when the screw 13 is screwed in, its tip moves along the inclined surface 12a, so that the first free end 7 resists the spring force of the first flat part 4 and moves downward in the figure, i.e. The movement is adjusted in a direction perpendicular to the optical disk surface, and then by screwing in the screw 14, the tip of the screw 13 and the tip of the screw 14 squeeze each inclined surface 12a, 12b, so that the moving position is fixed. It's getting old. One end of the pick-up mount 15 is fixed in the vicinity of the second free end 9 by screws 16a and 16b, and the other end extends in a direction parallel to the optical disk surface. An optical pickup 18 is mounted on an intermediate stand at each end. The intermediate stand 10 is also provided with a screw attachment part 19, in which one screw 20 and the other screw 2 are attached.
1 is attached. Like the first adjusting means, the second adjusting means is composed of inclined surfaces 17a, 17b and two screws 20, 21. For example, when the screw 20 is screwed in, the extended other end forms the inclined surface 17a. is adjusted by moving downward in the figure, that is, in a direction perpendicular to the optical disk surface, against the spring force of the second flat part 8, and then by screwing in the screw 21, the tip of the screw 20 and the tip of the screw 21 are connected. The movement of the inclined surfaces 17a and 17b is fixed by pressing the inclined surfaces 17a and 17b.

Function When adjusting, for example, loosen the screws 14 and 21 as necessary, and when attempting to adjust the inclination of the optical axis 22 of the optical pickup 18 in the direction shown by the arrow θx in the figure, use the first adjustment. Do it by means. That is, by turning the screw 13, the leaf spring 3
The first free end 7 moves up and down in the figure, and the first flat part 4 tilts about the fixed end 5 as a fulcrum, thereby adjusting the tilt of the pick-up mount 15 in the θx direction. When attempting to adjust the inclination in the direction indicated by the arrow θy, the second adjustment means is used. That is, by turning the screw 20, the second plane part 8 is tilted about the bending part with the first plane part 4 as a fulcrum, so that the pick-up mount 15 is tilted at 90 degrees with respect to the arrow θx in this case. The inclination is adjusted in the direction of the arrow θy. Normally, it is necessary to adjust the inclination in an arbitrary direction by combining the θx direction and the θy direction, so the first adjustment means and the second adjustment means adjust the screw 13 or the screw 20 alternately as appropriate. be done. When the adjustment is completed, the fixing screws 14 and 21 are tightened to fix the mounting optical axis 22 of the optical pickup 18 to the slider 1. In addition, if necessary, screw 1
After adjustment in steps 3 and 20, they are fixed with screws 14 and 21, respectively.

Effects As described above, according to this invention, the direction of the optical axis of the optical pick-up can be adjusted freely by simply turning two screws, and by tightening the two screws after the adjustment, the optical pick-up can be reliably positioned at the adjusted position. Since it is fixed, the installation work is simple and the configuration can be simple.

[Brief explanation of the drawing]

1 and 2 are perspective views for explaining one embodiment of this invention. 1... Slider, 3... Leaf spring, 10... Intermediate stand, 12a, 12b... Inclined surface, {13... Screw,
14... screw} (first adjustment means), 15... pick-up mounting base, 17a, 17b... inclined surface,
18...Light pick-up, {20...Screw, 21
...screw} (second adjustment means).

Claims (1)

[Claims for Utility Model Registration] (1) A slider that is reciprocally driven in the tracking control direction of the optical disk, and a first flat portion made of a plate-shaped elastic body and parallel to the optical disk surface, one end of which is A fixed end is fixed to the slider, and the other end is a first free end, which is located between the fixed end and the first free end and forms one side of the first plane part. a leaf spring whose side end portions are bent to form a second flat portion extending in a direction perpendicular to the optical disk surface, and whose extended end constitutes a second free end; and the first free end. an intermediate stand fixed in the vicinity; a first adjusting means for adjusting the movement of the intermediate stand relative to the slider in a direction perpendicular to the optical disk surface and fixed to each other; and fixed in the vicinity of the second free end. a pick-up mount extending in a direction parallel to the optical disk surface and mounting an optical pick-up; an optical pickup mounting mechanism comprising second adjustment means for adjusting the movement in the direction and fixing them relative to each other. (2) The first adjustment means forms two inclined surfaces opposite to a plane parallel to the optical disk surface on the extended end side of the first free end of the intermediate stand, and Each is provided with a screw for adjusting and pressing parallel to the optical disk surface,
The second adjusting means forms two inclined surfaces opposite to a plane parallel to the optical disk surface on the extended end side of the second free end of the intermediate stand, and each of the inclined surfaces is connected to the optical disk surface. 2. The optical pickup mounting mechanism according to claim 1, wherein the optical pickup mounting mechanism is provided with a screw for adjusting and pressing in parallel with the .