JPS6232350Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pick-up angle adjustment mechanism in an optical disc player, and its purpose is to have a simple structure and to be able to easily perform fine angle adjustments.

Hereinafter, the present invention will be explained based on the embodiments shown in the drawings. Fig. 1 is a plan view showing a schematic configuration of an optical disc player to which the pick-up angle adjustment mechanism according to the invention is applied, and Fig. 2 is a plan view showing the same angle. A plan view of the adjustment mechanism, FIG. 3 is a sectional view taken along the line -- in FIG. 2, FIG. 4 is a sectional view taken along the - line in FIG. 2, and FIG. 5 is a sectional view taken along the - line in FIG.

In the above drawings, 1 is a disk, 2 is a spindle motor that rotates the disk 1, and the motor 2 is fixed. 3 is the carriage motor 4
A mount 5 is mounted on the slider 3, and a pickup 6 for an optical system is fixed on the mount 5.

On the lower surface of the mounting base 5 for fixing the above-mentioned pick-up 6, two protrusions 7 and 8 are spaced 9 apart at positions in the longitudinal direction passing on the optical axis of the pick-up 6.
At the same time, an elongated hole 10 is provided in a direction orthogonal to the longitudinal direction on the optical axis. Note that the lower surfaces of the protrusions 7 and 8 are formed in a semicircular arc shape. On the other hand, the above-mentioned protrusions 7 and 8 are provided on the upper surface of the slider 3.
V-shaped grooves 11 and 12 that fit into the grooves and a guide pin 13 that projects into the elongated hole 10 are provided. Therefore, the pickup 6 has V-shaped grooves 11 and 1 as shown in FIG.
The protrusions 7 and 8 that fit into 2 are used as fulcrums to swing freely in the direction of the arrow. In addition, the above-mentioned protrusions 7 and 8
and the elongated hole 10 on the slider 3 side, and the V-shaped grooves 11, 1
2 and the guide pin 13 may be respectively provided on the mounting base 5 side. A fixing screw 15 inserted from the lower surface of the slider 3 as an elastic member 14 via a spring spring is rotatably screwed into the spaced apart portion 9 between the two protrusions 7 and 8.

Further, on one side of the mounting base 5, an arm portion 16 is provided to protrude in the horizontal direction perpendicularly from the position of the elongated hole 10. An elastic member 1 formed by a spring spring is attached to this arm portion 16 from the bottom surface of the slider 3.
A fixing screw 18 inserted through 7 is rotatably screwed together. Further, the tip of an adjustment screw 19 that is rotatably screwed into the bottom surface of the slider 3 is in contact with the lower surface near the tip of the arm portion 16 .

Next, to explain the operation of the present invention, the disk 1 mounted on the spindle of a spindle motor 2 is rotated at high speed by the motor 2, while the pick-up 6 is connected to the slider 3 and the carriage motor 4.
The laser beam emitted from the pickup 6 while being transferred in the radial direction of the disk 1 detects the pit surface of the disk 1.

Therefore, in order to adjust the angular position of the pick-up 6, first tighten the fixing screws 15 and 18 as much as possible, then return one fixing screw 15 slightly and the other fixing screw 18 several turns. The mounting base 5 is biased clockwise by the member 17 around the protrusions 7 and 8 in FIG. Next, when the adjusting screw 19 is rotated so that it comes into contact with the lower surface of the mounting base 5 and is further screwed in, the mounting base 5 is moved to the protrusion 7,
It can be rotated counterclockwise around 8. By adjusting the angle in this way, the output of the pickup 6 can be maximized, that is, the laser beam from the pickup 6 can be applied perpendicularly to the pit surface of the disk 1. After the adjustment is completed, the fixing screws 15 and 18 are fully tightened to fix the mounting base 5 to the slider 3 in a non-rotatable manner.

As described above, the present invention is an optical disc player comprising a mounting base 5 on which an optical system pick-up 6 is attached, and a slider 3 on which the mounting base 5 is mounted and is movable horizontally in the radial direction of the disc 1.
A fulcrum provided on the lower surface of the mounting base 5, a first fixing screw 15 that brings the fulcrum of the mounting base 5 into contact with the slider 3, and a first fixing screw 15 that brings the fulcrum of the mounting base 5 into contact with the slider 3 via the fixing screw 15. First elastic member 14 that urges
, a second fixing screw 18 screwed into the mounting base 5 at a certain distance from the above-mentioned fulcrum, and the fixing screw 18
The second elastic member 17 biases the mounting base 5 in a certain direction via the second elastic member 17, and the adjustment screw 19 rotates the mounting base 5 in a direction opposite to the biasing direction of the second elastic member 17. It is something. Therefore, the structure is simple, and fine angle adjustments of the pickup 6 can be easily made, and fixing after the angle adjustment can be simultaneously done by the adjustment member. or,
By appropriately changing the positional relationship of each adjustment member,
The angle of the pickup 6 can be adjusted in a wide range from fine to fine adjustments.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a schematic configuration of an optical disc player to which a pick-up angle adjustment mechanism according to the present invention is applied, FIG. 2 is a plan view of the same angle adjustment mechanism, and FIG. 4 is a cross-sectional view taken along the - line in Fig. 2, and Fig. 5 is a - line sectional view in Fig. 2.
A line cross-sectional view is shown. 1...Disc, 3...Slider, 5...Mounting base, 6...Pickup, 7, 8...Protrusion, 1
1, 12... V-shaped groove, 14, 17... elastic member,
15, 18...fixing screw, 19...adjusting screw.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In an optical disc player comprising a mounting base for mounting an optical system pick-up, and a slider on which the mounting base is mounted and capable of horizontal movement in the radial direction of the disc, the lower surface of the mounting base a first fixing screw that brings the fulcrum of the mount into contact with the slider; a first elastic member that urges the fulcrum of the mount toward the slider via the fixing screw; A second fixing screw screwed into the mount at a certain distance from the fulcrum, a second elastic member that biases the mount in a certain direction via the fixing screw, and a second elastic member that biases the mount in a certain direction. 1. A pick-up angle adjustment mechanism for an optical disc player, comprising an adjustment screw for rotating a mounting base in a direction opposite to the direction in which the pickup is tilted. 2. A pick-up angle of an optical disk player according to claim 1 of the utility model registration claim, in which the above-mentioned fulcrum is formed on a protrusion, and a V-shaped groove that can be freely fitted with the protrusion is formed on a slider. Adjustment mechanism. 3. The pick-up angle adjustment mechanism for an optical disk player as set forth in claims 1 and 2 of the utility model registration claim, wherein the mounting base is fixed to the slider by tightening the first and second fixing screws after the angle is adjusted.