JP3110698U - Tilt adjustment mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilt adjustment mechanism which can be adjusted with high accuracy with a simple configuration and which is low in cost.
A pickup 2 is provided on a chassis 1, and a guide shaft 3 is provided.
Thus, one end is slidably guided. On the other end side of the pickup 2, a guide plate 4 is provided on the chassis 1, and the pickup 2 is guided by the cooperation of this and the guide shaft 3. When adjusting the inclination of the pickup, the inclination of the pickup 2 with respect to the tangential direction of the disk is adjusted by attaching the guide plate 4 to the chassis 1 at both ends thereof and turning each of the adjusting screws 6 for adjusting the height. The tilt of the pickup 2 with respect to the radial direction of the disc can be adjusted by turning the adjusting screw 7 for adjusting the height of the end of the guide shaft 3 on the turntable side and the adjusting screw 6 on the turntable side. it can.
[Selection] Figure 1

Description

The present invention relates to a tilt angle adjusting mechanism, for example, a tilt angle adjusting mechanism that is suitable for application to a disk playback device that plays back a disk.

2. Description of the Related Art Conventionally, in a disk reproducing apparatus that reproduces an optical disk such as a CD and a DVD, an inclination adjustment mechanism that adjusts the inclination of a pickup with respect to the disk is used so that the laser hits the disk vertically. FIG. 4 is a top perspective view of a main part of a disc reproducing apparatus using a conventional tilt angle adjusting mechanism. In the figure, a block-like base 102 on which a pickup (not shown) is mounted is provided on the chassis 101 of the disk reproducing apparatus, and this serves as a main track portion so as to move along the radial direction of the disk. Guide shaft 103
Thus, one end is slidably guided.

In addition, a guide portion 101 a as a sub track portion made of a portion of the chassis 101 is provided on the other end side of the base 102, and the base 1 is cooperated with the guide shaft 103.
02 is guided. Note that a rack portion 102 a extending in the axial direction is provided in the vicinity of the guide shaft 103 on the base 102, and this is linked with a pickup driving mechanism (not shown) so that the base 102 extends along the guide shaft 103. Driven.
The chassis 101 is mainly made of a resin molded product.

On the other hand, a plate 104 is provided on the chassis 101 at one end of the track portion of the pickup, and a turntable 105 that rotates with a disk placed thereon protrudes from the upper surface thereof.
A spindle motor (described later) for rotating the turntable 105 projects from the lower surface.

When adjusting the inclination of the pickup relative to the disk, the inclination of the base 102 with respect to the tangential direction of the disk can be adjusted by turning the Tan adjusting screw 106 provided on the other end side (the guide portion 101a side) of the base 102. The tilt of the plate 104 with respect to the radial direction of the disk can be adjusted by turning the Rad adjustment screw 107 provided on the opposite side of the plate 104 from the pickup.

FIG. 5 is an enlarged view of the vicinity of the Tan adjusting screw 106, where FIG. 5A is an upper perspective view and FIG. 5B is a lower perspective view. As shown in the figure, a reel-like engagement portion 108 is provided on the other end side of the base 102, and the guide portion 101a is sandwiched between the flange portions. By moving the adjusting screw 106 up and down, the base 10
2 is a mechanism in which the tilt in the disk tangential direction is adjusted by rotating around the guide shaft 103. When the pickup is driven, the engaging portion 108 moves while sliding along the guide portion 101a.

6A and 6B are enlarged views of the vicinity of the Rad adjustment screw 107. FIG. 6A is an upper perspective view and FIG. 6B is a lower perspective view. As shown in the figure, the end of the plate 104 opposite to the pickup is connected to the chassis 101 by a Rad adjustment screw 107 via an adjustment spring 109 that is a compression coil spring. When the Rad adjustment screw 107 is turned up and down, the plate 104 rotates around an end (not shown) on the pickup side, and the tilt in the disk radial direction is adjusted. In the figure, reference numeral 110 denotes a spindle motor.

For other optical pickups that have a simple structure and occupy as little space as possible on the base, which is advantageous for reducing the thickness of the optical disc device, and that the guide shaft height can be adjusted with high accuracy. A guide shaft height direction angle adjusting mechanism is disclosed in Patent Document 1. In addition, an optical disk device that is thin and small that can be mounted on a notebook computer,
Patent Document 2 discloses an assembly method of an optical disc apparatus that can improve the performance by reducing the tilt adjustment error of the optical pickup and further improve the assemblability.
JP 2002-222571 A JP 11-149724 A

However, in the conventional configuration as described above with reference to FIGS. 4 to 6, mechanisms for adjusting the tangential and radial tilt of the disk are provided in different systems, respectively, and the component configuration is large and the cost is increased. It is a factor of. Further, in the configuration as described in Patent Document 1, an expensive guide shaft is used for the sub-track portion, and a special structure using a tension spring or a dedicated torsion spring is used. It must be structured, and this is also a major factor in increasing costs.

Further, in the configuration as described in Patent Document 2, a guide shaft is similarly used for the secondary track portion, and a structure using a special conical coil spring must be used. This is also a large-scale cost increase. In view of such problems, the present invention has an object to provide a tilt adjustment mechanism that can be adjusted with high accuracy with a simple configuration and that is low in cost.

In order to achieve the above object, according to the present invention, a base, a main track portion for guiding the pickup to move along a predetermined direction on the base, and the pickup on the base are the predetermined base. Having a secondary track part that cooperates with the main track part to move along the direction,
The sub track part is attached to both ends of the sub track part by a first adjusting screw via a first compression coil spring, and one end of the main track part is connected to the base. It is characterized by being attached by a second adjusting screw via two compression coil springs.

The base is a substantially flat chassis made of sheet metal, the main track portion is a rod-shaped guide shaft, and the sub track portion is a long plate-shaped guide plate made of sheet metal. .

Furthermore, by moving the guide plate up and down by turning each of the first adjusting screws at both ends thereof, the pickup rotates around the guide shaft,
By moving one end of the guide shaft up and down by turning the second adjusting screw, the guide shaft turns around the other end, and one end of the guide plate is turned by turning the first adjusting screw. By moving up and down, the guide plate rotates around the other end,
Thus, the pickup is configured to rotate around the other end of each track portion.

According to the present invention, it is possible to provide a tilt adjustment mechanism that can be adjusted with high accuracy with a simple configuration and that is low in cost.

Specifically, the sub-orbital part of the pickup uses parts that are simply provided with mounting holes at both ends of a long plate-like sheet metal, and the chassis is also used as a sheet metal part. Because it has a simple configuration using only typical screws and compression coil springs,
There is a cost merit and it is possible to realize an inclination adjustment mechanism that can be adjusted with high accuracy.

  Embodiments of the present invention will be described below with reference to the drawings.

1A and 1B are perspective views of a disc reproducing apparatus using an inclination adjusting mechanism according to Embodiment 1 of the present invention. FIG. 1A is a perspective view of an upper part, and FIG. 1B is a perspective view of a lower part. FIG. In the figure,
A block-shaped pickup 2 is provided on a substantially flat chassis 1 made of a sheet metal as a base of a disk reproducing apparatus, and moves in the radial direction of the disk.
One end is slidably guided by a rod-shaped guide shaft 3 as a main track portion.

A guide plate 4 as a sub track portion is provided on the chassis 1 at the other end side of the pickup 2 and is made of a long plate-shaped sheet metal. The pickup 2 is guided by the cooperation of the guide plate 4 and the guide shaft 3. Note that a rack portion 2 a extending along the axial direction is provided in the vicinity of the guide shaft 3 on the pickup 2, and the pickup 2 moves along the guide shaft 3 by interlocking with a pickup driving mechanism (not shown). Driven.

On the other hand, on one end side of the track portion of the pickup, a bracket 1a comprising a portion of the chassis 1 is provided.
However, the turntable 5 is provided so as to protrude in a trapezoidal shape, and a turntable 5 that rotates with a disk placed thereon protrudes from the upper surface thereof, and a spindle motor 10 that rotates the turntable 5 on the lower surface thereof.
Is protruding.

When adjusting the inclination of the pickup with respect to the disk, the inclination of the pickup 2 with respect to the tangential direction of the disk is adjusted by attaching the guide plate 4 to the chassis 1 at both ends and turning the adjustment screws 6 for adjusting the height. Further, by turning the adjusting screw 7 for adjusting the height of the end of the guide shaft 3 on the turntable side and the adjusting screw 6 on the turntable side, the inclination of the pickup 2 with respect to the radial direction of the disc Can be adjusted. That is, by adjusting the inclination of the guide shaft 3 and the inclination and height of the guide plate 4, it is possible to adjust the inclination angle of the two axes on the pickup 2.

FIG. 2 is an enlarged view of the vicinity of the adjusting screw 6 for the guide plate 4 in the lower perspective view of the disk reproducing apparatus. FIG. 2 (a) shows the turntable side, and FIG. Shows the side. As shown in FIGS. 1A and 1, the other end of the pickup 2 is provided with a U-shaped engaging portion 2 b as viewed from the side, thereby holding the guide plate 4. By moving the guide plate 4 up and down by turning the adjustment screws 6 at both ends, the engaging portion 2b moves up and down in conjunction with this, and as a result, the pickup 2 rotates around the guide shaft 3,
This is a mechanism for adjusting the tilt in the disk tangential direction.

Note that when the pickup is driven, the engaging portion 2 b moves while sliding along the guide plate 4.
In this case, since the ceiling surface of the engaging portion 2b slides on the upper surface of the guide plate 4, it is desirable to perform a smooth surface treatment such as applying so-called grease on the upper surface of the guide plate 4 in consideration of friction.

Now, the guide plate 4 is attached to the chassis 1 by the adjusting screw 6 via the compression coil spring 8 at both ends thereof. Specifically, as shown in FIG. 2, a so-called protruding tap 1 b in which a female thread is cut by providing a burring at a position on the chassis 1 side corresponding to both ends of the guide plate 4 is compressed. In a state where the coil spring 8 is fitted, the adjusting screw 6 is passed through mounting holes (not shown) opened at both ends of the guide plate 4 and screwed into the protruding tap 1b. In this state, since the guide plate 4 is always urged away from the chassis 1 by the compression coil spring 8, the screw head moves up and down by turning the adjustment screw 6, and the distance between the guide plate 4 and the chassis 1 is increased. Fine adjustments can be made.

3A and 3B are enlarged views of the vicinity of the adjusting screw 7 for the guide shaft 3, wherein FIG. 3A is a perspective view and FIG. 3B is a view as seen from the axial direction. As shown in FIG. 1 and FIG. 1B, an adjustment screw 7 is provided in the vicinity of the end of the guide shaft 3 opposite to the turntable.
By moving the end portion up and down by turning the adjusting screw 7, the guide shaft 3 rotates around the turntable side end portion. Further, the guide plate 4 is rotated around the turntable side end by moving the end of the guide plate 4 opposite to the turntable up and down by turning the adjusting screw 6. As a result, the pickup 2 rotates around the turntable side end of the track portion, and the tilt in the disc radial direction is adjusted.

Now, the guide shaft 3 is attached by an adjusting screw 7 or the like via a compression coil spring 9 at the end opposite to the turntable. Specifically, as shown in FIG.
A burring portion (not shown) is provided at a position on the chassis 1 side corresponding to the end portion of the guide shaft 3, and the tip of the compression coil spring 9 is attached to the end portion of the guide shaft 3 with the compression coil spring 9 fitted therein. Engage. Further, in the vicinity of the end of the guide shaft 3, the adjusting screw 7, which is a countersunk screw, is screwed into a screw hole 1 e (not shown) provided in the chassis 1,
The tapered surface 7a is brought into contact with the outer peripheral surface of the guide shaft 3.

Further, a cut-and-raised piece 1c from the chassis 1 is provided near the end of the guide shaft 3 on the side opposite to the adjusting screw 7, and the outer peripheral surface of the guide shaft 3 is in contact with the side wall.
In this state, the end portion of the guide shaft 3 is always urged away from the chassis 1 by the compression coil spring 9, and as a reaction, the guide shaft 3 is cut and raised from the taper surface 7a of the adjusting screw 7, and the side wall of the piece 1c and below The power to hold down is working. Therefore, by turning the adjustment screw 7 in this state, the screw head moves up and down, and the distance between the end of the guide shaft 3 and the chassis 1 can be finely adjusted.

On the other hand, as shown in FIG. 1B, the end portion of the guide shaft 3 on the turntable side is configured to be inserted into and supported by the shaft hole 1da opened in the cut and raised piece 1d from the chassis 1. In this embodiment, the adjustment screw 7 or the like is provided at the end of the guide shaft 3 opposite to the turntable. However, the present invention is not limited to this and may be provided at the end of the turntable. I do not care. Note that when the adjustment of the tilt angle by each of the adjustment screws is completed, these adjustment screws are fixed by a so-called screw lock agent, and displacement due to vibration or the like is prevented.

As described above, in the present invention, a part that has a mounting hole at both ends of a long plate-like sheet metal is used as a secondary track part of the pickup, and the chassis is also a sheet metal part. Since it has a simple configuration that uses only general screws and compression coil springs as parts for the operation, it is possible to realize an inclination adjustment mechanism that is cost-effective and that can be adjusted with high accuracy.

The configuration of the present invention can be applied not only to the tilt angle adjustment of the optical pickup but also to the tilt angle adjustment in other electronic devices such as a magnetic disk device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a disk reproducing apparatus using an inclination adjusting mechanism according to Embodiment 1 of the present invention. The enlarged view near the adjusting screw for the guide plate. The enlarged view near the adjusting screw for the guide shaft. The upper part principal part perspective view of the disc reproducing | regenerating apparatus using the conventional inclination adjustment mechanism. The enlarged view near the Tan adjustment screw. The enlarged view near Rad adjustment screw.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chassis 1a Bracket 1b Ejection tap 1c Cut and raised piece 1d Cut and raised piece 1e Screw hole 2 Pickup 2a Rack part 2b Engagement part 3 Guide shaft 4 Guide plate 5 Turntable 6 Adjustment screw 7 Adjustment screw 7a Tapered surface 8 Compression coil spring 9 Compression Coil spring 10 Spindle motor

Claims (4)

A substantially flat chassis made of sheet metal as a base, a rod-shaped guide shaft as a main track portion that guides the pickup to move along the radial direction of the disk on the chassis, and the chassis on the chassis A long plate-like guide plate made of a sheet metal as a secondary track portion that guides the pickup in cooperation with the guide shaft so that the pickup moves along the radial direction of the disc;
The guide plate is attached to both ends of the guide plate via a first compression coil spring via a first adjustment screw, and one end of the guide shaft is connected to the chassis with a second compression coil spring. Is attached with a second adjusting screw via
By moving the guide plate up and down by turning each of the first adjusting screws at both ends, the pickup rotates around the guide shaft, and the inclination in the disk tangential direction is adjusted,
By moving one end of the guide shaft up and down by turning the second adjusting screw, the guide shaft turns around the other end, and one end of the guide plate is turned by turning the first adjusting screw. By moving up and down, the guide plate rotates around the other end,
Accordingly, the pickup is rotated around the other end of each track portion to adjust the inclination in the disk radial direction. A base, a main track part that guides the pickup to move along a predetermined direction on the base, and the main track part to move the pickup along the predetermined direction on the base; A secondary track part that cooperates to guide,
The sub track part is attached to both ends of the sub track part by a first adjusting screw via a first compression coil spring, and one end of the main track part is connected to the base. An inclination angle adjusting mechanism which is attached by a second adjusting screw via two compression coil springs. The base is a substantially flat chassis made of sheet metal, the main track portion is a rod-shaped guide shaft, and the sub track portion is a long plate-shaped guide plate made of sheet metal. 2. The tilt adjustment mechanism according to 2. By moving the guide plate up and down by turning each of the first adjusting screws at both ends thereof, the pickup is rotated around the guide shaft,
By moving one end of the guide shaft up and down by turning the second adjusting screw, the guide shaft turns around the other end, and one end of the guide plate is turned by turning the first adjusting screw. By moving up and down, the guide plate rotates around the other end,
4. The tilt adjustment mechanism according to claim 3, wherein the pickup is rotated about the other end of each track portion.

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