KR0138348B1 - Double clamping apparatus for disk player - Google Patents

Abstract

The present invention relates to a double clamp device of a disc player, in order to correct the center of a double-sided disk seated on the upper surface of the turntable, the clamp chucked to the upper surface of the disk as a double clamp is mounted to be transported up and down in the deck. Therefore, when recording or reproducing signals on both sides of the disc, the center of the disc is corrected by the double clamp to match the vertices of the beams scanned by the optical pickup device, and slips are prevented when the disc is rotated and stopped to perform normal operation. can do.

Description

Dual clamp unit of disc player

1 is a schematic side cross-sectional view showing a conventional disc player,

2 is a front view showing a state where a clamp is mounted on a conventional disc player,

3 is a schematic side sectional view in which the double clamp device of the disc player according to the present invention is mounted;

4 is an enlarged cross-sectional view of the double clamp device shown in FIG.

5 (a) and 5 (b) are schematic cross-sectional views of a state in which a double clamp device is operated when reproducing a lower surface and an upper surface of a disk.

* Description of the symbols for the main parts of the drawings *

10,40: Deck 11,41: Spindle Motor

12,42: rotating shaft 13,43: disk

14,44 turntable 15,45 adjuster

15a, 45a: projection 16,46: cam

16a, 46a: Adjusting groove 17,61: Clamp

18a, 18b, 74b, 74b: 1st and 2nd feed shaft 19,75: frame

19a, 75a: Horizontal rack gear 20,80: Optical pickup device

21,81 Base 22,82 Lens

23,83: Information Roller 24,84: Gear

25: guide cam 25a: guide home

50: double clamp 51: drive motor

52: first gear 53: worm gear

54: helical gear 55: recognition switch

56: main shaft 56a: through hole

56b: groove 57: ring

58,69: bearing 59: guide cover

60: band spring 62: screw shaft

62a: square groove 63: shaft

64: support pin 65: rubber ring

66: bush 67: fixing screw

68: bearing set screw 70: upper guide table

71,72: spring 73: compression spring

The present invention relates to a double clamp device of a disc player, and more particularly, to a disc player in which a double clamp for chucking a disc in a laser player (LDP) is mounted in the deck to facilitate the center correction of the disc. A double clamp device.

Generally, disc players used in compact discs (CDs), laser discs (LDs), compact disc ROMs (CD-ROMs), etc., are used for recording or playing back signals on one or both sides of a disc. In the state of holding the disk, the optical pickup device is transferred or moved up and down in the radial direction of the disk to record or reproduce signals on one side and both sides of the disk.

In the conventional disc player, as shown in FIGS. 1 and 2, the turntable 14 is mounted so that the disc 13 rests on the upper end of the rotation shaft 12 of the spindle motor 11 mounted in the deck 10. The turntable 14 is provided in the upper direction, the adjusting portion 15, each of which has projections 15a formed on both ends thereof, fits into the adjusting groove 16a formed in the cam 16, and the adjusting portion 15 has a turntable. A clamp 17 is chucked with the upper surface of the disk 13 seated on 14.

In addition, the U-shaped horizontal rack gear 19a provided with the first and second feed shafts 18a and 18b at regular intervals with the disk 13 seated on the turntable 14 is frame 19. It is formed in.

On the other hand, in the optical pickup device 20 for recording or reproducing a signal on the disk 13, a lens 22 is mounted on an upper surface of the base 21, and a drive gear (shown in one side of the base 21) is shown. And the connecting gear 24 equipped with the guide roller 23 are geared. In addition, when the optical pickup device 20 is transported along the first and second transfer shafts 18a and 18b, the optical pickup device 20 is mounted on the coupling gear 24 to prevent the optical pickup device 20 from flowing. The guide roller 23 is fitted to the guide cam 25 in which the guide groove 25a is formed.

In the conventional disc player configured as described above, in order to chuck the disc 13 seated on the turntable 14 with the clamp 17, the cam 16 on which the adjustment groove 16a is formed is moved to the left side. The clamp 17 attached to the 15 is moved downward so that the bottom surface of the clamp 17 is chucked to the upper surface of the disk 13 so that the disk 13 seated on the turntable 14 is rotated by the spindle motor ( 11) is rotated by. In addition, in the optical pickup device 20 installed downward of the disk 13, the connecting gear 24 and the horizontal rack gear 19a are geared to each other by driving of the motor, and are transported along the first feed shaft 18a. The signal is recorded or reproduced on the bottom surface of the disc 13.

On the other hand, when recording or reproducing a signal on the upper surface of the disk 13, the optical pickup device 20 is moved along the U-shaped horizontal rack gear (19a) formed in the frame 19 by the drive of the motor 2, the feed shaft 18b is reached and moved in the radial direction of the disk 13 to record or reproduce the signal on the upper surface of the disk 13.

However, the above-described clamp device of the disc player scans with the optical pickup device located on the lower surface of the disk because the thickness of the double-sided disk is thicker than the one-sided surface when recording or reproducing signals on the upper and lower surfaces of the double-sided disk seated on the turntable. The peak of the beam is different from the peak of the beam to be scanned from the upper surface to affect sound and sound quality, and when the disk is temporarily rotated or stopped, slip is generated at the bottom of the clamp and the upper surface of the disk. There was a problem that the normal play (play) or operation is not performed smoothly.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to use a clamp for chucking a disk seated on a turntable as a double clamp, so that when recording or reproducing signals on single-sided and double-sided disks, Provides a double clamp device of a disc player that can correct the center of the disc chucked to match the apex of the beam scanned by the optical pickup device, and prevent slip during rotation and stop of the disc to perform normal operation Is in.

A feature of the double fastening clamp device for a disc player according to the present invention for achieving the above object is, in the clamp attached to the adjustment unit is moved up and down to chuck the disc seated on the turntable, the adjustment unit A conveying means installed at an upper portion to convey the screw shaft for correcting the center of the double-sided disk up and down; Guide means mounted to the inside of the main shaft such that the upper guide table connected to the screw shaft by the transfer means is chucked to the upper surface of the disk seated on the turntable; The upper guide table chucked to the upper surface of the disk and the clamp is composed of a rotating means for rotating around the main shaft.

EMBODIMENT OF THE INVENTION Hereinafter, one preferred embodiment of the double clamp apparatus of the disc player which concerns on this invention is described in detail with reference to an accompanying drawing.

3A through 5B show a double clamp device of a disc player according to the present invention, wherein a disc is placed on an upper end of the rotating shaft 42 of the spindle motor 41 mounted in the deck 40. A turntable 44 on which the 43 is seated is provided, and an adjustment part 45 having projections 45a formed at both ends at an upper direction of the turntable 44 is provided in the adjustment groove 46a formed in the cam 46. Fitted to move up and down, a double clamp 50 is attached to the adjusting portion 46 is chucked to the upper surface of the disk 43 seated on the turntable 44.

The double clamp 50 is fitted to the first gear 52 and the worm gear 53 and the helical gear 54 fitted to the drive motor 51 is fixed to the upper surface of the adjustment unit 45, the helical gear A recognition switch 55 is installed to be adjacent to the outside of the 54, and the main shaft 56 having the through hole 56a is fixed to the bottom of the adjustment part 45.

A groove 56b is formed at one end of the main shaft 56 so that a ring 57 is fitted therein, and a guide cover 59 having a bearing 58 interposed outside the main shaft 56 is movable fit. On the outside of the bearing 58, a clamp 61 fixed with a band spring 60 is mounted.

In the through hole 56a formed in the main shaft 56, a screw shaft 62 having a square groove 62a is mounted, and the shaft 63 is supported by a support pin (downward) of the screw shaft 62. 64, a bush 66 in which a rubber ring 65 is inserted is fixed to the bottom of the shaft 64 by a fixing screw 67. As shown in FIG.

In addition, a bearing 69 fixed by a bearing fixing screw 68 is interposed outside the bush 66, and the upper guide table 70 is fitted to the outside of the bearing 69.

On the other hand, the spring 71, 72 is inserted into the outer side of the main shaft 56 and the shaft 63, respectively, the compression spring 73 in the square groove (56a) formed in the main shaft 56 It is inserted.

The U-shaped horizontal rack gear 75a provided with the first and second transfer shafts 74a and 74b at regular intervals with the disk 43 mounted on the turntable 44 interposed therebetween. Formed.

In addition, in the optical pickup device 80 for recording or reproducing a signal on the disk 43, a lens 82 is mounted on an upper surface of the base 81, and a drive gear (shown in FIG. And a guide gear 84 mounted with a guide roller 83 to the outside, and the guide roller 83 mounted to the connection gear 84 is a guide cam having a guide groove (not shown). (Not shown).

The double clamp device of the disc player according to the present invention configured as described above, as the cam 46 is moved to the left to chuck the disc 43 seated on the turntable 44 with the double clamp 50, The double clamp 50 attached to 45 is moved downward, and the bottom surface of the clamp 61 of the double clamp 50 is in contact with the top surface of the disk 43.

In addition, the clamp 61 in contact with the upper surface of the disk 43 is the outer side of the main shaft 56 by the downward downward force of the double clamp 61, as shown in (a) of FIG. The spring 71 inserted into the main body is compressed, and the guide cover 59 and the clamp 61, which are movable fit to the main shaft 56, are moved upwards, so that they are flush with the bottom surface of the clamp 61. The bottom surface of the upper guide table 70 to be positioned is in contact with the upper surface of the disk 43 to chuck the disk 43.

In the downward direction of the chucked disk 43, the optical pickup device 80 is moved along the first feed shaft 74a by the connecting gear 84 geared to the driving gear according to the driving of the motor, thereby allowing the disk 43 to move. ) Will record or play the signal.

On the other hand, when recording or reproducing a signal on the upper surface of the disk 43, the optical pickup device 80 moves along the U-shaped horizontal rack gear 75 formed in the frame 75 by driving the motor. 2 The first gear reaching the end of the feed shaft 74b and geared and connected by rotation of the drive motor 51 to correct the center of the double-sided disk 43, as shown in FIG. 5 (b). When the 52 and the worm gear 53 and the helical gear 54 are rotated, the outer surface of the helical gear 54 and the recognition switch 55 are brought into contact with each other and are conveyed downward of the screw shaft 62. The range is limited to the center of the disk 43 (ie, the range where the vertices of the beams scanned by the optical pickup device 80 coincide).

As the screw shaft 62 is transported downward, the shaft 63 coupled with the support pin 64 is transported downward, and the spring 72 inserted into the outer side of the shaft 63 is compressed. The bush 66 and the upper guide table 67 interposed with the bearing 69 push the upper surface of the disk 43 to correct the center of the disk 43.

At this time, when the screw shaft 62 is transported downward by the drive motor 51, in order to prevent damage of the disk 43 from inertial force and excessive clamping force of the disk, the square groove of the screw shaft 62 The compression spring 73 inserted into the 62a and the rubber ring 65 fixed to the bush 66 with the fixing screw 67 absorb the shock generated when the screw shaft 63 is transferred downward. The signal is recorded and reproduced on the upper surface of the disk 43.

As described above, according to the dual clamp device of the disc player according to the present invention, when the disc seated on the turntable is chucked with the double clamp to record or reproduce signals on single-sided and double-sided disks, the peaks of the beams scanned by the optical pickup device are recorded. By correcting the center of the disk to match, the slip of the disk is prevented to perform a normal operation.

Claims (6)

In the clamp attached to the adjusting unit which is transported up and down to chuck the disk seated on the turntable, The upper surface of the disk mounted on the turntable is provided in the upper portion of the adjusting unit, the conveying means for correcting the center of the double-sided disk is transferred up and down, and the upper guide table connected to the screw shaft by the conveying means Guide means mounted inside the main shaft to be chucked to, And an upper guide table chucked to the upper surface of the disk and rotating means for rotating the clamp about the main shaft. The method of claim 1, wherein the transfer means, A disk player comprising a forward and reverse drive motor, a first gear geared to the output of the drive motor, a worm gear geared to the first gear, and a helical gear geared to the worm gear. Double clamp device. 2. The double clamp device of a disc player according to claim 1, wherein a recognition switch for limiting a conveying range of said conveying means is mounted on an upper portion of the adjusting portion. The method of claim 1, wherein the guide means, Compression spring mounted in the square groove of the screw shaft, a support pin for connecting the screw shaft and the shaft, and a double clamp device of the disc player consisting of a spring inserted to the outside of the shaft. The method of claim 1, wherein the rotating means, A double clamp device of a disc player composed of a spring inserted into the main shaft and the guide cover and a bearing interposed between the clamps. 6. The double clamp device of a disc player according to claim 1 or 5, wherein a ring is mounted in a groove formed at one end of the main shaft to prevent separation of the bearing.