KR0127038B1 - Light pick-up drive system of disk player - Google Patents

Abstract

OPTIC PICK-UP DRIVING APPARATUS FOR DISC PLAYERDisclosed is an optic pick-up driving apparatus for s disc player including a transfer means, and direction conversion means. The optic pick-up driving apparatus records and/or plays back an information by comprising an optic pick-up detecting an electrical signal from a light beam reflected at a disc medium by projecting a light beam to the disc medium. The transfer means transfers the optic pick-up to the direction of the diameter of the disc medium. The direction conversion means converts the projection direction of the light beam of the optic pick-up. Thereby, the light beam is selectively projected to at least two disc media.Disclosed is an optic pick-up driving apparatus for s disc player including a transfer means, and direction conversion means. The optic pick-up driving apparatus records and/or plays back an information by comprising an optic pick-up detecting an electrical signal from a light beam reflected at a disc medium by projecting a light beam to the disc medium. The transfer means transfers the optic pick-up to the direction of the diameter of the disc medium. The direction conversion means converts the projection direction of the light beam of the optic pick-up. Thereby, the light beam is selectively projected to at least two disc media.

Description

Optical pickup drive of disc player

1 is a schematic diagram of a conventional optical pickup driving device.

2 is a schematic side view of an optical pickup driving apparatus according to an embodiment of the present invention.

3 is a side view of the optical pickup rotated in FIG.

FIG. 4 is a schematic perspective view showing an optical pickup portion of FIG. 2. FIG.

5 is a schematic side view of the optical pickup driving apparatus of the embodiment according to the present invention;

Fig. 6 is a layout view of a disc in the case where light beams are projected onto three discs by the optical pickup drive device according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: optical pickup drive device 2: optical pickup

3: carriage 4: motor

5: screw rod 8: feed motor

9: guide rail 21: lens

The present invention relates to an optical pickup driving apparatus for a disc player for driving an optical pickup for projecting a light beam onto a disc in the disc player and detecting an electrical signal from the light beam reflected from the disc.

In line with the trend that various products are becoming more versatile as consumer demands are diversified, disc players are also diversifying their functions. A plurality of discs can be stored simultaneously, and any other disc during recording or playback can be used. Multiple disc players that can be exchanged are examples of these. In such a multi-disc player, one optical pickup is provided for each disc to be recorded and / or reproduced, and each optical pickup is provided with an optical pickup driving apparatus for driving them.

FIG. 1 schematically shows an optical pick-up driving unit of a twin disc player capable of storing two discs among such multiple disc players. A first pick-up transfer device 71 and a second pick-up transfer device 72 for transferring the first pick-up 50, the second pick-up 60 are provided, respectively. The first disk 91 is positioned at the position opposite to the lens 51 of the first pickup 50, and the first disk 91 is positioned at the position opposite the lens 51 of the second pickup 60. The second disc 92 can be accommodated in positions opposite to the lens 61 of the second pickup 60, respectively. When the first disc 91 and the second disc 92 are accommodated in the twin disc player having such a structure, the optical pickup device is driven to record or reproduce the discs 91 and 92. As follows.

First, when recording or replaying the first disc 91, the first disc 91 is rotated by a drive source (not shown), and the first motor 81 drives the first pick-up transfer device 71 so that the first disc 91 is rotated. The second disk 92 is rotated by a driving source (not shown) as in the case of recording or reproducing the first disk 91 while transferring the first pickup 50 in the radial direction of the first disk 91. The two motors drive the second pickup transfer device 72 to record or reproduce the second pickup 60.

However, in the conventional track disc player having such a structure, two optical pickup driving apparatuses for driving the optical pickup and the two optical pickup must be provided, respectively, in order to record and / or reproduce on the two discs that are stored. Since the space becomes large, there is a problem that it is not suitable for miniaturization and that the manufacturing cost is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide an optical pickup driving apparatus for selectively projecting a light beam generated from one optical pickup onto a plurality of disks.

In order to achieve this object, an optical pickup driving apparatus of a disc player according to the present invention is to drive an optical pickup for projecting an optical beam onto a disc in the disc player and detecting an electrical signal from the light beam reflected from the disc. And a conveying means for conveying the pickup in the radial direction of the disk, wherein a light beam is selectively projected onto a plurality of disks that are parallel to the imaginary line around the imaginary line parallel to the conveying direction of the optical pickup. It is characterized in that it comprises a direction switching means for rotating the optical pickup using the virtual line as the center of rotation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 show an optical pickup driving apparatus according to the present invention for use in a twin disc player, and FIG. 2 shows a light beam such that a light beam from the optical pickup 2 is projected onto the first disk 11. The pickup 2 is a side view showing a state in which the lens 21 faces the first disc 11, and FIG. 3 shows the optical pickup 2 in FIG. 2 and the lens 21 in the second disc 12. FIG. It shows the state facing). 4 is a perspective view illustrating an optical pickup driving unit in FIG. 2.

Referring to these figures, in the twin disc player, the first disc 11 and the second disc 12 are housed so as to be arranged side by side with the virtual line C in the middle of the virtual line C. This virtual line C is parallel with the conveyance direction of the optical pickup mentioned later.

Between the first disc 11 and the second disc 12, an optical beam is selectively beamed onto the discs 11 and 12 through the lens 21 in order to record information on the discs or to reproduce the recorded information. An optical pickup 2 for projecting the light beam and detecting an electrical signal from the light beam reflected from the disk, and an optical pickup drive device 1 for driving the optical pickup 2 is provided.

In the optical pickup driving apparatus 1, a direction switching means for changing the projection direction of the light beam emitted from the optical pickup 2 and a transfer for transferring the optical pickup 2 in the radial direction of the disks 11 and 12. Means are provided. The echo switching means includes a direction switching means for changing the projection direction of the light beam emitted from the optical pickup 2, and a conveying means for transferring the optical pickup 2 in the radial direction of the disks 11 and 12; It is provided.

The redirection means is configured to rotate the optical pickup 2 such that the lens 21 of the optical pickup 2 selectively faces the disks 11 and 12 so that the light beam emitted through the lens 21 is rotated. In order to be selectively projected to (11, 12), in this embodiment, a key ridge 3 having a screw hole formed in the body and a motor 4 are provided. The motor 4 is mounted on the carriage 3 such that the output shaft 41 is positioned to coincide with the virtual line C. The optical pickup 2 is mounted on the output shaft 41 of the motor 4. Are combined. Therefore, the optical pickup 2 maintains the state supported by the carriage 3 so that it can be rotated with respect to the carriage 3 by making the said virtual line C into a rotation center line when the motor 4 is operating. It is preferable that this motor 4 is a stepping motor. The conveying means is provided with a conveying motor 8 for rotating the screw rod 5 which is screwed to the screw ball of the carriage 3.

Looking at the operation of the optical pickup drive device according to the present invention having such a configuration as follows.

Referring to FIG. 2, the optical pickup 2 is positioned such that the lens 21 faces the first disk 11. When the screw rod 5 is rotated by operating the transfer motor 8 in this state, the motor 3 coupled to the carriage 3 and the carriage 3 and the optical pickup coupled to the motor 4 2) is transported in the radial direction of each disc. In this way, while transporting the optical pickup 2, the first disk 11 is rotated using a separate driving source (not shown) to record or reproduce the first disk 11.

On the other hand, when the second disk 12 is to be recorded or reproduced during recording or reproduction of the first disk 11 or after completion, the motor 4 coupled to the carriage 3 is operated. Accordingly, the optical pickup 2 is rotated such that the lens 21 faces the second disk 12 as shown in FIG. 3 by using the virtual line C as the center of rotation. In such a state, the second disk 12 is rotated while the optical pickup 2 is transported, and the second disk 12 is recorded and reproduced in the same manner as the method of recording or reproducing the first disk 11. .

FIG. 5 schematically shows a U-shaped optical pickup driving device in which the guide rail G surrounds one of the two disks D1 and D2, and the carriage has such a structure. (3) is guided by the guide rail (G), it can be transferred from a position opposite to one side of the disk (D1) to a position opposite to the other side of the disk (D1) from the position of the disk (D1) Can be recorded and / or reproduced.

In the present embodiment, the case of recording and / or reproducing two discs has been described. However, when the discs are stored as shown in Fig. 6, the three discs D1, D2, and D3 are recorded and picked up as one pickup. Alternatively, a plurality of discs can be recorded and / or reproduced by such a disc storage method.

As described above, the optical pickup driving apparatus according to the present invention allows the light beam from one optical pickup to be selectively projected onto a plurality of disks circumscribed around a virtual ship line parallel to the transport direction of the optical pickup. Since the pickup has a means for rotating the virtual line, the space for accommodating the plurality of disks and the space for installing the optical pickup are reduced, so that the product can be miniaturized and the manufacturing cost can be reduced.

Claims (3)

For driving an optical pickup for projecting a light beam onto a disc in a disc player and detecting an electrical signal from the light beam reflected from the disc; for transferring the optical pickup in a radial direction of the disc; An optical pickup driving apparatus for a disc player having a conveying means for conveying in a radial direction, the optical pickup driving apparatus comprising: a light beam selectively provided on a plurality of disks arranged in parallel with the virtual line around a virtual line parallel to a conveying direction of the optical pickup; And a redirection device for rotating the optical pickup using the virtual line as the center of rotation so that the optical pickup can be projected. The apparatus of claim 1, wherein the redirection means includes a carriage rotatably supporting the optical pickup and being transported by the transfer means, and a motor mounted on the carriage to generate power for rotation of the optical pickup. An optical pickup drive device for a disc player. 43. The U-shaped guide of claim 42, wherein the carriage guides the carriage so that the carriage can be transferred from a position opposite one side of one of the plurality of disks to a position opposite the other side of the disk. An optical pickup drive device for a disc player, comprising a rail.