JPH0675341B2 - Disc player - Google Patents

Description

The present invention relates to a disc player represented by a compact disc player and an optical video disc player.

[Outline of Invention]

In the present invention, the first guide for guiding the slide of the pickup arranged on one surface of the disc and the second guide for guiding the slide on the other surface are
They are linked by a link and are tilt-driven integrally.

[Background technology]

FIG. 2 shows the structure of a conventional disc player. In the figure, reference numeral 1 is a spindle motor for rotating a turntable 2. A clamper 3 clamps the disk 4 on the turntable 2. Reference numeral 5 is a guide bar arranged below the disk 4, and guides the sliding movement of the slider 7 in the disk radial direction. Reference numeral 6 is a guide bar arranged on the disk 4. Reference numeral 8 denotes a gear attached to the slider 7, which meshes with a substantially U-shaped rack 9. When a slider motor (not shown) mounted on the slider 7 is rotated, the gear 8 is driven and the slider 7 is moved (slide) in the radial direction of the disk 4. At this time, the slide motion of the slider 7 is guided by the guide bar 5.

A pickup 11 is mounted on the slider 7, and the pickup 11 is moved along with the slider 7 in the disk radial direction. As a result, the signals recorded on the tracks from the inner circumference to the outer circumference of the disc 4 are reproduced.

The slider 7 is also equipped with a tilt control mechanism.
That is, the pickup 11 is rotatably supported by the slider 7 with the pin 12 as a fulcrum. When the drive mechanism 13 is driven, the pickup 11 rotates about the pin 12 as a fulcrum, and the angle with respect to the disc 4 can be controlled.

The lower surface of the disk 4 is reproduced as described above. When the upper surface of the disk 4 is reproduced, the gear 8 is driven and the slider 7 slips out of the guide bar 5 and is fitted into the guide bar 6. During this time, the slider 7 is reversed by being guided by the rack 9 and the pickup 11 is downward (toward the disc 4).
Directed to. Then, reproduction and tilt control are performed as in the case of the lower surface.

[Problems to be solved by the invention]

In the conventional disc player, since the tilt control mechanism is also mounted on the slider 7 and slid in this way, the total mass of movement of the slider 7 increases, and the slider 7
Not only is it difficult to drive the slider quickly, but the slider motor has a large capacity and is expensive, and the overall size of the slider motor becomes large. Further, since only the angle of the pickup 11 is adjusted, there is a drawback that the distance between the disc 4 and the pickup 11 changes when the disc 4 is warped or the like.

In view of this, the present invention reduces the moving mass of the slider and not only controls the angle with respect to the disc, but also makes the distance between the disc and the pickup constant.

[Means for solving problems]

The disc player of the present invention includes a spindle motor, a turntable rotated by the spindle motor, one or two pickups arranged on both sides of the disc mounted on the turntable, and one side of the disc. A first guide for guiding the arranged pickup in the disc radial direction; a first base supporting the first guide and rotatable in a direction perpendicular to the disc;
A second guide which guides the pickup arranged on the other surface side of the disc in the disc radial direction; and a second base which supports the second guide and is rotatable in a direction perpendicular to the disc. , When the first base rotates, the second
Is also provided with a link connecting the first base and the second base so that the base also rotates.

[Action]

When the spindle motor is rotated, the disc placed on the turntable is rotated. The pickup is located on the side that plays back. When there is one pickup, the pickup is transferred to the reproduction surface side, and when there are two pickups, the one arranged on the reproduction surface side is selected.

When reproducing one side, the pickup is guided by the first guide and moved in the disc radial direction. The first guide is supported by the first base. The first base (and thus the first guide) is rotatable in the direction perpendicular to the disc.

A second guide and a second base are likewise provided for guiding the pickup for reproducing the other surface.

The first base and the second base are connected by a link. Therefore, when one of the first base and the second base is turned, the other is also turned simultaneously via the link.

Thus, since the tilt control mechanism is not mounted on the slider, the moving mass of the slider can be reduced.
Further, by rotating the base, the distance between the pickup and the disc can be adjusted.

〔Example〕

FIG. 1 shows the structure of the disc player of the present invention, and the portions corresponding to those in FIG. 2 are designated by the same reference numerals.

In FIG. 1, reference numerals 21 and 22 denote substrates, and the spindle motor 1 and the plate 23 are fixed to the substrate 21. A plate 24 is fixed to a substrate 22 provided above the disc 4. A tilt base 27 supports the guide bar 5. Tilt base 27 is plate 23 by pin 25
It is rotatably supported by. The position of the pin 25 in the radial direction of the disk is not the end of the innermost circumference of the disk but the outer circumference of a predetermined distance. This distance is appropriately selected from the average value of the warp of the disk 4. A slider 7a on which a pickup 11a is placed is fitted in the guide bar 5.

Similarly, symmetrically with respect to the disc 4 (on the upper side of the disc 4), the tilt base 28 that supports the guide bar 6 that guides the slider 7b on which the pickup 11b is mounted is a pin 26.
It is rotatably supported by the plate 24.

The outer peripheral side ends of the tilt bases 27 and 28 are connected by a link 31 via pins 32 and 33.

41 is a tilt motor, 42 is a worm fixed to the rotation shaft of the tilt motor 41, and 43 is a gear meshing with the worm 42. A cam 44 having a cam groove 45 is connected to the gear 43. One end of a lever 46 is fitted in the cam groove 45. A pin 48 is provided at the other end of the lever 46, and the pin 48 is fitted in a groove 49 formed at the center of the link 31. lever
46 is rotatable about a pin 47.

Then, the pickup 11a is selected when reproducing the lower surface of the disc 4, and the pickup 11b is selected when reproducing the upper surface. The slider corresponding to the selected one is driven by a slider motor (not shown) and is moved in the disk radial direction using the guide bar 5 or 6 as a guide.

Regardless of which pickup is selected, tilt control is performed by the same mechanism. That is, when the tilt motor 41 is energized and rotated, the worm 42 and the gear 43 rotate. As a result the cam connected to the gear 43
44 rotates. As the cam 44 rotates, the cam groove 45 moves to the lever 46
Is rotated about the pin 47 as a fulcrum. Therefore, the pin 49 of the lever 46 moves the link 31 in the vertical direction, and the tilt base 2
7, 28 are rotated around pins 25, 26. Since the guide bars 5 and 6 are supported by the tilt bases 27 and 28, the angles and distances of the pickups 11a and 11b with respect to the disc 4 are controlled.

The present invention can be applied to the case where one pickup is moved and arranged toward the reproducing surface as in the case of FIG.

〔effect〕

As described above, according to the present invention, the guides arranged on the upper side and the lower side of the disc are connected by the link, and the tilt is controlled by integrally rotating the guides. Can be adjusted, and at the same time, the moving mass of the slider can be reduced, and the slider can be moved quickly. It is also possible to prevent the player from becoming large.

[Brief description of drawings]

FIG. 1 is a side view of a disc player of the present invention, and FIG. 2 is a side view of a conventional disc player. 1 …… Spindle motor 2 …… Turntable 3 …… Clamper 4 …… Disk 5,6 …… Guide bar 7,7a, 7b …… Slider 8 …… Gear 9 …… Rack 11,11a, 11b …… Pickup 12 ...... Pin 13 …… Drive mechanism 21,22 …… Board 23,24 …… Plate 25,26 …… Pin 27,28 …… Tilt base 31 …… Link 32,33 …… Pin 41 …… Tilt motor 42… … Worm 43 …… Gear 44 …… Cam 45 …… Cam groove 46 …… Lever 47,48 …… Pin 49 …… Groove

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Taichi Akiba, 426-10 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa factory (72) Inventor Tadashi Funabashi 4-2610, Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa factory

Claims (1)

[Claims] 1. A spindle motor, a turntable rotated by the spindle motor, and one or two arranged on both sides of a disk mounted on the turntable.
Two pickups, a first guide arranged on both sides of one side of the disc for guiding the pickup in the radial direction of the disc, and a first guide supporting the first guide and rotating in a direction perpendicular to the disc. A free first base, a second guide that guides the pickup arranged on the other side of the disc in the radial direction of the disc, and a second guide that supports the second guide and is perpendicular to the disc. And a link that connects the first base and the second base so that the second base also rotates when the first base rotates. A disc player comprising: