KR940005855B1 - Disk clamping apparatus for disk player - Google Patents

Abstract

The apparatus for preventing unstable reproduction caused by concentric error includes a transferring tube (16) moving up/down as well as rotating with the rotation force of a spindle motor (2), a shifting tube (11) moving up/down with guide of a fixed tube (5), a clamping means clamping a side of an optical disc (37) selectively, an operation means rotating with the dropping force of a tray (38), and a pressing means pressing the upper surface of the disc when lifting.

Description

Disc clamp device of disc player

FIG. 1 is a cross-sectional view showing the structure of a conventional disc clamp device. FIG. 1 (a) is a state clamped for reproducing the A side of the disc, and FIG. 1 (b) is a clamped state for reproducing the B side of the disc. Degree.

2 is a longitudinal sectional view showing main parts of the disk clamping apparatus of the present invention.

3 is a functional diagram of a state in which an optical disk is clamped by the disk clamping apparatus of the present invention, and FIG. 3 (a) is a state where the A surface is clamped when the optical disk is used, and FIG. 3 (b) is a state where the B surface is clamped when the optical disk is used. Degree.

4 is a state in which a compact disk is clamped by the disk clamping device of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG. 3 (a).

6 is a sectional view taken along the line B-B in FIG. 5 (a).

* Explanation of symbols for main parts of the drawings

4: long hole 5: fixed tube

6: roller 7: protrusion

8: insertion hole 9: spring

10 ball 11: moving tube

12: hanging groove 13: guide

14: stone 15: groove

16: transfer pipe 17: locking piece

18: upper cutout groove 19: lower cutout groove

20: hinge 21: weight

22: guide hole 23: lever

24 turntable 25

26: upper inclined surface 27: lower inclined surface

28: clamp 29: spring

30: clamp body 31: elastic member

32: ball bearing 33: push rod

34: spring 35: torsion spring

36: crimping piece

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc clamp device of a disc player, and more particularly, to improve the performance of a device due to an accurate clamping operation in a disc player capable of playing an optical disc or a compact disc according to a selection.

In general, a disc player places a disc on top of the tray and then moves the tray horizontally and vertically into the machine, so that the disc on the tray sits on the turntable so that when the turntable rotates together, the pickup moves the laser to the disc. A device that scans and reloads a disk.

Among the discs, optical discs are made of upper and lower surfaces, that is, A and B surfaces, by adhering two discs for double-sided reproduction, and generally allow concentricity errors of A and B surfaces to be 0.2 mm or less.

Accordingly, the optical disk has a clamping device that allows A and B surfaces to be selected and held during playback because A and B surfaces do not have the same radius with respect to the turntable shaft due to the concentricity error between A and B surfaces. Will have

Conventionally, as shown in FIG. 1, the lower clamping means is installed on the shaft 53 of the spindle motor 52 fixed to the main plate 51 to hold the A surface of the disk 54. It is provided below the lever 55 is composed of the upper clamping means for holding the B surface of the disk 54.

The lower clamping means is a turntable 56, which is press-fitted to the shaft 53 to be rotated, a lower clamp 58 elastically installed by the spring 57 in the turntable to be able to move up and down, and the lower clamp Formed on the outer circumferential surface of the inclined surface 59 to determine the position of the A surface of the disk 54 when the lower clamp 58 is elevated, and attached to the turntable 56 so that the lower clamp 58 is above a certain height. Consists of the iron piece 60 to prevent lifting.

In addition, the upper clamping means is a lower portion of the body 62 is connected to the upper clamp 61, the elastic piece is elastically installed in the body by the spring 63 in the upper engaging piece 64 is screwed with a screw 65 ( 66, a pressing plate 67 elastically installed in the body 62 as a spring 63, and a pressing piece 68 elastically installed below the pressing plate to press the B surface of the disk 54. The upper clamp 61 is inserted into the hole 69 formed in the pressing plate 67 and moved between the groove 70 formed in the body and the groove 71 formed in the upper clamp 61 when the body 62 moves up and down. Ball bearing 72 to control the rise and fall of the fixed plate and the magnet plate 73 is fixed to the lower side of the pressing plate 67 is attached to the iron piece 60 fixed to the turntable 56 when clamping ( 74 and a disk 54 formed on the outer circumferential surface of the upper clamp 61 so that the upper clamp 61 is lowered. It is composed of an inclined surface 75 for determining the B surface position of.

Therefore, when the disk 54 is seated on the turntable 56 by the loading means, A-side clamping is automatically performed. In this case, the spring 57 in the turntable 56 as shown in FIG. Since the lower clamp 58 is raised by the upper surface of the lower clamp 58, the inclined surface 59 formed on the outer circumferential surface of the lower clamp 58 holds the A surface of the disk 54. Accordingly, the A surface of the disk 54 is the spindle. The concentricity becomes constant about the shaft 53 of the motor 52.

At this time, the iron piece 60 fixed to the turntable 56 is connected to the magnet 73 constituting the upper clamping means, and the pressing piece 68 installed below the pressing plate 67 elastically faces the B side of the disk 54. It is in a state of being pressed.

In this way, when the A surface of the disk 54 is clamped, the spindle motor 52 attached to the main plate 51 is driven to rotate the turntable 56 press-fitted to the shaft 53, and thus the disk 54 Rotates to scan the laser onto the rotated disk by a pickup (not shown) to reproduce the A surface of the disk 54.

In addition, when the B surface of the disk 54 is played back, the lever 55 is lowered according to the B surface regeneration input signal, and the body 62 constituting the upper clamping means is pressed. The upper clamp 61 and the working piece 66 connected to the body 62 are also lowered while being lowered downward while being elastic, which is inserted into the hole 69 of the pressing plate 67 and formed in the upper clamp 62. The ball bearing 72 located in the groove 70 is moved toward the groove 70 formed inside the body 62 so that the body 62 is lifted by the restoring force of the spring 63 when the B surface of the disk 54 is regenerated. Prevent it.

On the other hand, when the working piece 66 is lowered, the working piece is guided to the shaft 53 of the spindle motor 52 and pushes the lower clamp 58 and accordingly the inclined surface 59 formed on the outer circumferential surface of the lower clamp 58. The inclined surface 75 formed on the outer circumferential surface of the upper clamp 61 while holding away from the A surface of the disk 54 holds the B surface of the disk 54, thereby clamping the B surface of the disk 54.

At this time, the magnet 73 continues to be connected to the iron piece 60 as in the case of A-side clamping.

Then, when playing back the B side of the disk 54 and playing the A side again, the lever 55 may be lifted again. At this time, the lever 55 is raised and fixed to the upper side of the pressing piece 16 by a screw 65. Since the lifting piece 64 is lifted up, the pressing piece 66 and the body 62 go up together under the restoring force of the spring 64, and the upper clamp 61 rises accordingly.

At this time, the ball bearing 72 inserted into the hole 69 of the pressing plate 67 and entering the groove 70 formed in the body 62 again enters the groove 71 formed in the upper clamp 61, and the upper clamp 61 ) Will be determined.

On the other hand, as the operation piece 66 is raised, the pressing force of the lower clamp 58 is released, and accordingly the lower clamp 58 is raised to clamp the A surface of the disk 54 again.

However, such a conventional disk clamping device is particularly complicated by the structure of the upper clamping means, the operation for clamping the B side of the disk is made through a variety of parts, the clamping operation is inaccurate, resulting in the failure of the device as well as assembly There was a problem that sex was difficult.

The present invention has been made in view of the above-described conventional problems, and the clamping of the optical disk can be achieved according to the selection as well as the clamping of the optical disk, thereby making the A and B surface clamping of the disk more stable when the optical disk is clamped. The purpose of the present invention is to solve defects in reproduction quality and sound quality caused by unstable reproduction signals due to concentricity errors.

In order to achieve the above object, a disc clamp device for a disc player of the present invention is provided. Hereinafter, the present invention will be described in more detail with reference to FIGS. 2 to 6 of the accompanying drawings. .

2 is a longitudinal cross-sectional view showing the main structure of the disk clamping apparatus of the present invention, FIG. 3 is a functional diagram of an optical disk clamping state, and FIG. 4 is a state diagram clamping a compact disk. 5 is a cross-sectional view taken along the line A-A of FIG. 3 (a), and FIG. 6 is a cross-sectional view taken along the line B-B of FIG.

The present invention is a spindle motor (2) by inserting a fixed tube (5) formed in the long hole (4) so that one end and the other end is maintained at a constant height below the shaft (3) of the spindle motor (2) fixed to the main plate (1) The upper side of the fixing pipe (5), the projection piece (7) having the roller (6) installed on one side and the insertion groove (8) is formed inward from the upper end of the fixing pipe (5) and the spring (9) to the insertion groove (8). By installing a moving tube 11 having a ball (10) elastically installed by the) so that the roller (6) is fitted into the long hole (4) formed in the fixed tube (5), the outer side of the shaft (3) spindle motor ( A guide tube 13 having a locking groove 12 is installed to be rotated together with the rotation of 2) so that the ball 10 elastically installed in the moving tube 11 is fitted into the locking groove 12.

In addition, a plurality of protrusions 14 are formed at the upper end of the moving tube 8, and at the lower end, a transfer tube 16 having grooves 15 is formed at an outer circumferential surface thereof. As the engaging piece 17 is formed, the engaging piece is fitted into the groove 15 formed in the conveying pipe 16 so that the moving tube 11 can be rotated left and right by a predetermined number of rotations. The upper cutting grooves 19 and the lower cutting grooves 19 are formed and a plurality of hinge pieces 20 are formed on the outer circumferential surface thereof so that the weights 21 at the outer ends into the lower cutting grooves 19. Is formed and the inner end is hinged rotatably coupled to the hinge piece 16 is fitted with a lever 23 is formed with a guide long hole 22.

Meanwhile, as the lower end of the turntable 24 is inserted into the upper cutout groove 18 and fixed to the shaft 3 of the spindle motor 2, the transfer pipe 16 is rotated when the turntable 24 rotates when the shaft is rotated. It is possible to rotate and between the shaft 3 and the inner lower side of the conveying tube 16 is provided with a pusher 25 to insert the guide hole 22 formed at the inner end of the lever 23 to the pusher lever 23 In accordance with the rotation of the sealer 25 to be moved up and down.

In addition, the clamp body 30 having the upper slope 26 and the lower slope 27 formed integrally with the spring 28 is installed on the turntable 24 so that the clamp body 30 is an elastic member. A plurality of ball bearings 32 are provided on the circumferential surface of the clamp body 25 to be positioned above the 31 to allow the inner side of the ball bearing to be connected to the lower inclined surface 27 formed on the clamp 28.

In addition, the upper side of the pusher 25 installed to be moved up and down in accordance with the rotation of the lever 23 is guided to the guide pipe 13 while the elastic rod 33 is elastically installed by the spring 34 to move up and down, At the upper end of the push rod 33, a plurality of pressing pieces 36 are installed so as to receive a force that is always going outward by the torsion spring 35 so that the pressing pieces can press the upper surface of the disk when clamping the disk. Reference numeral 37 denotes an optical disc, 38 a tray, and 39 a compact disc.

The present invention configured as described above makes the shaft 3 of the spindle motor 2, in which the A side disk when reproducing the A side of the optical disc 37, and the B side disk when the B side is reproducing, is fixed to the main plate 1. In the center, the radius must be constant in each direction so that clear sound and clear picture quality can be obtained during playback.

Therefore, the operation for clamping the A and B surfaces for reproducing the optical disc 37 will be described first.

In the state as shown in FIG. 3, the tray 38 on which the optical disc 37 is loaded is lowered by the loading means, wherein the optical disc 37 is seated on the turntable 24 and only the tray 38 continues. Since the weight (21) formed at the outer end of the lever 23 is pushed while descending, the lever (23) rotates around the hinge axis of the hinge piece (20) formed on the outer side of the conveying pipe (16) so that the outer side is downward. The inner side is moved upward while being guided to the lower notch grooves 19 formed in the transfer pipe 16.

In this way, when the lever 20 is moved below the horizontal by receiving the downward force of the tray 38 as shown by the dashed-dotted line in FIG. 3 (a) of the accompanying drawings, the downward movement of the tray 38 is stopped and the lever is simultaneously stopped. 23 is installed to fit in the guide hole 22 formed at the inner end of the lever 23 because it rotates as a solid line shown in Figure 3 (b) by the weight of the weight 21 formed at the outer end Since the pusher 25 is pushed up between the shaft 3 and the inner surface of the transfer pipe 16 and pushes the pusher 33, the pusher is guided to the guide pipe 13 by receiving the restoring force of the spring 34 and upwards. Is moved.

Therefore, the pressing piece 36 installed on the upper end of the push rod 33 is also moved together, and when raised above a certain height, the plurality of pressing pieces 36 form an umbrella shape by the torsion spring 35 to open radially to form the pressing piece. The end of 36 presses the B side of the optical disc 37.

On the other hand, the state where the optical disk 37 is seated on the turntable 24 as the tray 38 is lowered by the loading means is automatically reproducible on the A side of the optical disk 37, so the clamping is also the A side of the optical disk 37. The A-side clamping is provided on the outside of the clamp body 30, the ball bearing 32 is connected to the lower inclined surface 27 of the clamp 28, which is elastically installed by the spring 29 in the clamp body 30 Since the A surface of the optical disk 37 is clamped, the A surface of the optical disk 37 is kept at a constant concentricity, and the state at this time is as shown in FIG.

When the clamping of the A side disk is completed in this way, the spindle motor 2 fixed to the main plate 1 rotates in the forward direction (clockwise) to rotate the optical disk 37 forward, thereby recording on the A side of the optical disk 37. You get a picture and a sound.

In addition, when regenerating the B side of the optical disc 37, the B side should be clamped. In this case, when the spindle motor 2 reverses rotation (counterclockwise) according to the B side regeneration signal, The lower end is inserted into the formed upper cutout groove 18 so that the turntable 24 fixed to the shaft 3 reversely rotates the optical disc 37 while receiving the reverse rotational power of the turntable 24 and the transfer pipe 16. Reverses.

When the moving tube 11 reversely rotates, the inner roller 6 of the protruding piece 7 formed integrally under one side of the moving tube 11 is connected to the other end at one end of the long hole 4 formed in the fixed tube 5. Therefore, the moving pipe 11 is moved upward by the height difference t of the long hole 4 because it is guided and moved to the right in the drawing.

Therefore, the transfer pipe 16 is also moved upwards, so the plurality of protrusions 14 formed above the transfer pipe 16 push the clamp 28 elastically installed by the spring 29, so that the clamp 28 also clamps the body. The upper surface of the optical disk 37 has a constant concentricity because the ball bearing 32 installed on the circumferential surface of the clamp body 30 is moved to clamp the B surface of the optical disk 37. do.

This state is as shown in FIG. 3 (b) of the accompanying drawings. When the spindle motor 2 rotates in the reverse direction to regenerate the B side of the optical disc 37, the transfer tube receives the rotational force of the turntable 24. 16 is reversed, but the moving tube 11 does not rotate.

When clamping the B side of the optical disc 37 and clamping the A side again as shown in FIG. 3 (b), the spindle motor 2 fixed to the main plate 1 according to the A side regeneration signal of the optical disc 37 Rotates again in the forward direction, so that all the operations are performed in reverse with the operation from the A side reproduction to the B side reproduction of the previously described optical disc 37, so that the A side clamping of the optical disc 37 can be achieved again. The lowering operation of the transfer tube 16 is because the engaging piece 17 formed above the movable tube 11 is fitted into the groove 15 formed on the lower circumferential surface of the transfer tube 16, and thus the lowering of the transfer tube 11 is performed. Done together.

On the other hand, when the reproduction of the optical disc 37 is finished, the optical disc 37 seated on the turntable 24 needs to be removed. In this case, the tray 38, which has been lowered by the loading means, is lifted up to lift the optical disc 37. In contrast to the operation at the time of reproducing the A side of the optical disk 37, all the operations are performed as shown in FIG.

4 is a state diagram in which the compact disk 39 is generally used, and the clamping of the compact disk 39 is performed by the loading means as in the clamping of the optical disk 37 described above. The compact disk 39 mounted on the compact disk 39 is seated on the tentable 24 as the tray 38 descends, and the plurality of pressing pieces 36 are radially unfolded in the shape of umbrellas as described above. The upper inclined surface 26 of the clamp 28, which is elastically installed with the spring 29 in the clamp body 30, while pressing the upper surface of 37, clamps the compact disk 37 so that the concentricity of the compact disk 39 is increased. Is kept constant.

Therefore, the present invention enables accurate clamping of optical discs as well as compact discs according to the selection, thereby preventing sound and image quality defects caused by concentricity errors of the discs.

Claims (8)

A transfer pipe 16 installed to allow the turntable 24 to rotate together with the forward and reverse rotational force of the spindle motor 2 fixed to the main plate 1 so that the turntable 24 may rotate together; As the spindle motor 2 rotates forward and backward, the guide tube 13 is rotated by a predetermined number of revolutions while the guide tube 13 rotates, and the movable tube 11 is installed to be moved up and down by receiving the guide of the long hole 4 formed in the fixed tube 5. And the turntable 24 are moved together as the transfer pipe 16 rises and falls, while selecting and clamping the A and B surfaces of the optical disc 37, and the compact disc 37 can also be clamped. Clamping means to be provided, rotatably installed in the conveying pipe 16, an actuating means for rotating under the lowering force of the tray 38, and an upper surface of the disc during the lifting under the rotating force of the rotating means. It includes a crimping means for compressing the Disk clamping device of the disc player, characterized by configured. According to claim 1, The conveying pipe 16 is formed with a plurality of upper cutout grooves 18 to the upper having a stone piece 14, and downwards a plurality of lower cutout grooves 19 and the groove 15. And a plurality of hinge pieces (20) integrally formed on the outer circumferential surface thereof. The turntable (24) according to claim 1 or 2, wherein the conveying tube (16) is turned into an upper cutout groove (18) formed in the conveying tube (16) so that the conveying tube (16) can rotate under the rotational force of the spindle motor (2). Disc clamp device of a disc player in which the turntable is fixed to the shaft (3) of the spindle motor (2). The method of claim 1 or claim 2, wherein a plurality of engaging pieces 17 are formed on the outer circumferential surface of the moving tube 11 so that the engaging pieces are fitted into the grooves 15 formed in the conveying pipe 16, Protruding pieces 7 provided with rollers 6 are integrally formed so that the rollers 6 are fitted into the long holes 4 formed on one side of the fixed tube 5 so that the moving tube 11 is rotated in accordance with the rotation of the spindle motor 2. Disc clamp device of the disc player, so that the feed pipe 16 can be raised and lowered while the crank is raised and lowered. The clamping means according to claim 1 or 2, wherein the clamping means is elastically installed with a clamp body (30) installed on the turntable (24) and a spring (29) in the clamp body so that the upper inclined surface (26) and the lower inclined surface (27) are provided. The optical disc 37 comprises a plurality of ball bearings 32 which are integrally formed on the clamp 28 and the lower inclined surface 27 formed on the circumferential surface of the clamp body 30 and connected to the lower inclined surface 27 formed on the clamp 28. As the clamp body 30 moves up and down as the transfer pipe 16 rises and falls during regeneration, the A and B surfaces of the optical disc 37 can be selectively clamped by the ball bearing 32, and the compact disc 39 The disc clamp device of the disc player, which allows the compact disc 39 to be clamped by the upper inclined surface 26 formed in the clamp 28 during use. The lever according to claim 1 or 2, wherein the actuating means is fitted into the lower cutout grooves 19 formed in the conveying tube 16 and hinged to be rotatable to the hinge piece 20 formed in the conveying tube 16. (23), a weight (21) formed on the outer end of the lever 23 to rotate the lever 23 by its own weight when the lever is lowered below the horizontal, and the inner side of the lever 23 When the lever 23 is rotated as it is connected between the guide long hole 22 formed at the end and the inner surface of the shaft 3 and the feed pipe 16 of the spindle motor 2 and connected to the guide long hole 22. Disc clamp device of the disc player is composed of a pusher 25 to enable the lifting and lowering to operate the pressing means. The method according to claim 1 or 2, wherein the crimping means is elastically installed with a spring 34 between the shaft 3 of the spindle motor 2 and the inner surface of the feed tube 16 to lift and lower the seal 25. A plurality of push rods 33 which are guided by the guide tube 13 and lifted up, and a plurality of push rods 33 which are pushed to form an umbrella shape when the push rods are lifted and press the upper surfaces of the optical disc 37 and the compact disc 39. Disc clamp device of a disc player composed of a pressing piece (36). The method according to claim 4, wherein the insertion groove (8) is formed inside the moving tube (11) to allow the moving tube (11) to rotate as the spindle motor (2) rotates. The disc clamp device of the disc player 10 is elastically installed with a spring (9) and the engaging groove 12 is formed on the outside of the guide tube (13) so that the ball (10) is fitted into the locking groove (12).