KR940006128B1 - Pickup driving apparatus for lighting disk player - Google Patents

Abstract

The apparatus reduces moving time of the pickup carriage and prevents tangling of the pickup cable by rotating the pickup in the same direction as horizontal moving. The apparatus includes a carriage for moving the pickup (16), a guide for guidance of the pickup carriage, a turning device for rotation of pickup carriage with a pair of turn tables (12)(12a) and a moving rail (13), and a force transmission tool which comprises a driving gear (25), a pair of belts (23)(32), a tray moving gear(29), a bevel gear (29) for transmission of rotating force from loading motor (23).

Description

Pickup shifter for optical disc players

1 is a perspective view showing the main structure of an optical disc player having a conventional pickup moving device.

2 is a plan view showing the main structure of an optical disc play having a conventional pickup moving device.

FIG. 3 is an operation diagram of an optical disc player having a pickup moving device of the present invention. FIG. Top view, 3c or a top view showing a state in which the pickup is moved horizontally backwards to replay the back side of the disc after seating the disc on the turntable.

Figure 4 is an exploded perspective view showing the main structure of the pickup transfer device of the present invention.

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 3C.

6 is a perspective view of a pickup used in the pickup moving device of the present invention.

FIG. 7 is a sectional view taken along the line BB of FIG. 5, in which FIG. 7A is a state in which the pickup bundle is vertically moved rearward by a predetermined length to play the back of the disc, and FIG. 7B is a pickup bundle for playing the back of the disc. Is a 180 ° turn.

8 is a comparison diagram of a pickup movement curve of the conventional apparatus and the present invention, and FIG. 8a is a pickup movement curve diagram of the conventional apparatus, and FIG. 8b is a pickup movement curve diagram of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: lower plate 2: lower guide rod

3: Lower guide rail 5, 5a: Connecting rod

6: upper plate 7: upper guide rod

8: upper guide rail 10: shaft

11: moving rod 12, 12a: rotating plate

13: moving rail 15: pickup

17: groove 18: protrusion

19: driving motor 23: loading motor

25: drive gear 26: first power transmission gear

27: toothed gear 29: moving gear

30: second power transmission gear 31: driven gear

33: Bevel Gear

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup moving device of an optical disc player, and in particular, a pickup can be moved quickly when the front and rear surfaces of a disc are selected and played back. In general, an optical disc player is a device for reproducing images and sounds obtained by irradiating a disc with a light source (laser). The disc is usually formed by two discs joined together to form a front side and a rear side. When you choose to play the front or the back, you will have a pick-up device that allows you to move the pickup, which is the means of laser irradiation, to the front or back of the disc.

Conventionally, a lower guide rail 42 and a lower rack 43 are installed on one side of the lower plate 41 as shown in FIGS. 1 to 2, and the lower plate 41 and a plurality of lower plates 41 are provided. An upper guide rail 46 and an upper rack 47 are installed on the other side of the upper plate 45 connected by the connecting rod 44, and a rotating plate having the movable shaft 48 fixed to the rear of the lower plate 41. 49 is installed to rotate together with the rotation of the auxiliary gear 50, and the pickup 51 is installed to be movable in front of the lower plate 41.

In addition, the pickup 51 is formed on one side of the body 52, the groove 53 is fitted to the lower guide rail 42, the drive motor 54 is installed in the body 52 to generate power, and A drive pinion 55 installed on one side of the body 52 to manually move the pickup 51 while being engaged with the lower rack 43 by receiving power generated from the drive motor 54; and the body 52 Is installed in the rear of the planetary gear 56 to rotate the rotating plate 49 is composed of.

Therefore, when the disk 57 is seated on the turntable 58 by the loading means, the pickup 15 can reproduce the lower surface of the disk 57, that is, the front surface of the disk 57 as necessary. When the regeneration signal is selected, the driving motor 54 in the body 52 constituting the pickup 52 is driven, and at this time, the driving force of the driving motor is transmitted through a plurality of gears to one side of the body 52. The installed drive pinion 55 and the planetary gear 56 provided at the rear of the body 52 rotate in the direction of the arrow of FIG.

When the driving pinion 55 rotates as described above, the driving pinion 55 is engaged with the lower rack 43 installed in the lower plate 41, so that the pickup 51 moves horizontally to the rear, and the pickup 51 moves horizontally. The groove 53 formed on one side of the body 52 is made of a guide to the lower guide rail 42 installed in the lower plate 41.

The pickup 51 which is horizontally moved backwards while being guided to the lower guide rail 42 has a rotary plate installed so that the groove 53 passes through the lower guide rail 42 and is rotatable behind the lower plate 41. 49 is inserted into the moving shaft 48. When the pickup 51 is completely inserted into the rotary shaft 48, the lower part is completely removed from the guide rail 42.

On the other hand, in the state where the pickup 51 is horizontally moved backward, the planetary gear 56 installed at the rear of the pickup body 52 and being rotated according to the driving of the driving motor 54 is engaged with the auxiliary gear 50. The auxiliary gear 50 rotates under the rotational force of the planetary gear 56 and accordingly, the rotation plate 49 rotates 180 ° clockwise about the hinge axis, so that the pick-up supported by being fitted to one side of the rotation shaft 48 of the rotation plate 49 is supported. 51 is turned from one side to the other in a direction orthogonal to the initial straight line reverse direction as in the movement path shown in FIG. 8A.

When the pickup 51 is completed turning, the drive pinion 55 installed on one side of the pickup body 52 is engaged with the upper rack 47 installed on the upper plate 45, so that the body according to the driving of the driving motor 54 continues. The groove 53 formed in the 52 is removed from the abnormal shaft 49 and at the same time, the pickup 51 is horizontally advanced by the upper guide rail 46 installed on the upper plate 45 so that the back of the disk 57 And the drive motor 54 is turned off to complete the movement of the pickup 51.

In this manner, the movement of the pickup 51 is completed and the turntable 58 rotates to rotate the disk 57. At this time, the laser is irradiated through the irradiation unit 59 attached to the pickup body 52 to You will get the picture and sound recorded on the back.

In addition, when the front surface of the disk 57 is reproduced in the above state, the driving motor 54 in the body 52 constituting the pickup 51 is driven in the opposite direction to the direction in which it is driven to reproduce the rear surface of the disk 57. All operations proceed in reverse with the above-described playback of the back of the disk 57.

However, in the conventional pickup shifter as described above, when the rear play signal is input to play the front (bottom) of the disc and the back (upper), the pickup is straight as shown in the movement curve shown in FIG. It can be seen that the pickup movement curve changes rapidly at an angle at two points by continuously performing linear forward movement again in the direction orthogonal to the backward movement → the straight backward movement. As a result, the movement speed of the pickup must be rapidly reduced in the change point portion, and the overall movement speed is slowed, and the connection of the operation is unnatural in the conversion point portion, resulting in noise.

In addition, if the substrate is not fixed to the pickup, the cable for transmitting the reproducing signal of the disk read by the pickup to the substrate is twisted during the rotational rotation of the pickup. There was a problem in that the structure is complicated because it has to move like a pickup.

The present invention has been made to solve the above-mentioned conventional problems. When the pickup moves 180 ° after the linear backward movement to play the back side after playing the front side of the disc or to play the front side after the back side playing, It is an object of the present invention to allow the pickup to be quickly moved as the rotational movement is performed in the linear backward movement direction so that the movement curve of the pickup is in the shape of a wedge.

According to the aspect of the present invention for achieving the above object, the moving means is installed on the upper plate, the lower plate and the pickup body to perform the pickup, and the pickup is installed on the upper plate, the lower plate and moved by the moving means. Guide means for guiding, turning means rotatably installed at both connecting rods connecting the upper and lower plates to turn the pick-up, and power transmission means for transmitting the power of the loading motor to rotate the turning means. There is provided a pickup moving device of the optical disc player of the present invention, wherein the pickup has a curved shape when the pickup moves to play the back side after playing the front side of the disc or plays back the front side after the back side play.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 3 to 7 of the accompanying drawings.

FIG. 3 is a plan view showing the operating state of the pickup pick-up apparatus of the present invention, FIG. 4 is an exploded perspective view showing the main part structure, and FIG. 5 is a required cross-sectional view taken along line A-A of FIG. 6 is a perspective view of the pickup and FIG. 7 is a sectional view taken along line B-B in FIG.

The present invention, while installing the lower guide rod (2) and the lower guide rail (3) on the lower plate (1) and the lower rack (4) to one side of the lower guide rod (2), left, right connecting rod (5) The upper guide rod 7 and the upper guide rail 8 are also installed on the upper plate 6 connected to the lower plate 1 by the side of the upper guide rod 7. Install the upper rack (9).

In addition, the shaft (10) is rotatably installed on the connecting table (5) (5a), and the one side of the shaft (10) is fixed to one side of the rotating plate (12) with the movable rod (11) attached downward and the other side downward. The other side of the rotating plate 12a to which the moving rail 13 is attached is fixed so that it can be rotated together when the shaft 10 rotates.

And the lower guide rod (2) and the lower guide rail (3) is provided with a pickup 15 to be movable, the pickup (15) is formed on one side of the body (16) grooves fitted into the lower guide rod (2) The worm 20 is formed on the other side of the body 16 and fitted to the lower guide rail 3 and the worm 20 installed in the body 16 and connected to the shaft of the driving motor 19. And a worm gear 21 connected to the shaft so as to be engaged with the worm, and a drive pin 22 connected to the outer shaft of the worm gear and engaged with the lower rack 4.

In addition, the turning during the pickup movement of the present invention is performed by the driving of the loading motor 23 installed in the lower plate 1 to perform the loading operation, so that the pickup 15 can be turned according to the driving of the loading motor 23. Referring to the power transmission means for transmitting power as follows. Drive gear 25 is rotated by receiving the driving force of the loading motor 23 by the belt 24, and the first power transmission gear 26 and the first power transmission gear to be rotated in engagement with the drive gear. And a rotating gear 27 for moving the tray 28 while being selectively engaged with the rotating gear 27 and the second gear, and a second power transmission gear that rotates while being selectively engaged with the toothing gear 27. 30, the driven gear 31 meshed with the second power transmission gear and rotated, and the rotational force of the driven gear is received by the belt 32 and is installed on the connecting table 5 and 5a while rotating. It consists of a bevel gear 33 which rotates (10). Among the gears, the bevel gears 33 are rotatably installed on the lower plate 1 and the shaft 10, respectively. The other gears are rotatably installed on the lower plate 1.

Reference numeral 34 denotes a disk, 35 a turntable, and 36 an irradiation section.

According to the present invention configured as described above, the tray 28 is moved according to the driving of the rotating motor 23 to perform a loading process for seating the disc 34 on the turntable 35. This will be described in combination with the operation.

When the disk 34 is placed on the tray 28 in the state shown in FIG. 3A and then the loading buttton is selected, the loading motor 23 fixed to the hub plate 1 is driven clockwise in the drawing and the driving force The belt 24 → the driving gear 25 → the first coin gear 26 → the toothing gear 27 → the tray shifting gear 29 are transferred to the tray shifting gear in the counterclockwise direction. Accordingly, as the tray 28 enters the apparatus as shown in FIG. 3B, the disk 34 mounted on the tray 28 is seated on the turntable 35 and the loading motor 23 is turned off.

The gear of the toothing gear 27 is engaged with the tray moving gear 29 in the state before the tray 28 is moved so that the tray 28 is movable, but the tray moving gear is completed when the tray 28 is moved. It is short-circuited with (29) and is engaged with the second power transmission gear 30 instead.

In this state, the pickup 15 is located on the lower surface, that is, the front surface of the disk 34. At this time, the turntable 35 rotates the disk 34 and at the scanning portion 36 of the pickup 15. The laser is irradiated onto the front face of the disc 34 to obtain images and sounds recorded on the front face of the disc 34.

In addition, in order for the user to play the back of the disc 34, the pickup 15 needs to be moved to the back of the disc 34. The movement of the pickup 15 is performed by the user selecting the play button on the back of the disc. Is done.

In other words, when the play button on the back of the disc is selected, the driving motor 19 in the body 16 constituting the pickup 15 is driven, and the driving force is driven to the driving pinion 22 through the worm 20 and the worm gear 21. The pickup 15 is horizontally retracted along the lower rack 4 installed at one side of the guide piece 1 while the driving pinion 22 rotates in the direction of the arrow in the drawing.

Horizontal retraction of the pickup 15 is because the groove 17 formed on one side of the pickup body 16 is fitted to the lower guide rod (2) and the projection piece 18 formed on the other side is fitted to the lower guide rail (3) The pickup body 16 is guided to the lower guide rod (2) and the lower guide rail (3).

The pick-up 15 is horizontally retracted by the continuous driving motor 19, and then is separated from the lower guide rod 2 and the lower guide rail 3, and at the same time, a groove formed at one side of the pickup body 16 17) and the protruding piece 18 formed on the other side are guided by the moving rod 11 fixed below the one side rotating plate 12 and the moving rail 13 fixed below the other rotating plate 12a. As shown in the drawing, the pickup 15 is supported on the movable rod 11 and the movable rail 13.

At this time, the drive pinion 22 which is rotated in accordance with the drive of the drive motor 19 while the pickup 15 is horizontally reversed is short-circuited with the lower rack 4 so that the pickup 15 is no longer carried out even when the drive pinion 22 is rotated. It will not move.

In this manner, the pickup 15 is horizontally reversed and at the same time the loading motor 23 is driven clockwise again, and the driving force is belt 24 → drive gear 25 → first power transmission gear 26 → engagement gear. 27, the second power transmission gear 30 → the driven gear 31 → the belt 32 is transmitted to the bevel gear 33, so that the bevel gear 33 is rotated and accordingly the lower plate (1) And both shafts 12 and 12a fixed to the shaft 10 rotate together as the shaft 10 installed on the connecting table 5 and 5a connecting the upper plate 6 and the upper plate 6 rotates together.

Therefore, the pickup 15 supported on both rotating plates 12 and 12a is turned 180 ° while forming a movement curve as shown in FIG. 8B.

When the pickup 15 is turned, the loading motor 23 is turned off, and the gear of the toothing gear 27 is short-circuited with the second power transmission gear 30 and is engaged with the tray moving gear 29 again.

At this time, since the drive pinion 22 for moving the pickup 15 is engaged with the upper rack 9 installed on the upper plate 6, the pickup 15 is driven by the one side rotating plate 12 according to the driving of the driving gear 19. It moves out from the moving rail 13 fixed to the moving rod 11 and the other rotating plate 12a fixed to the upper guide rod (2) and the upper guide rail (3) installed on the upper plate (6) to move horizontally The position movement is completed on the rear surface of the disk 34 and the position movement completion of the pickup 15 is possible by turning off the driving motor 19 installed in the pickup body 16.

Accordingly, the movement of the pickup 15 is completed, and the turntable 35 rotates to rotate the disk 34. At this time, the laser is irradiated through the irradiation unit 36 attached to the pickup body 16 so that the disk 34 You will get the picture and sound recorded on the back.

In addition, when the back of the disc 34 is being played or when the front of the disc 34 is to be played again while the play is completed, all operations are performed in reverse with the previously played back of the disc. This becomes possible.

Therefore, when the pickup is moved to play the back side after playing the front side of the disc or to play the front side after the back side play, the pickup is made smoothly in the form of a movement curve by the horizontal movement and rotation turning of the pickup, and the high speed movement of the pickup is possible. Even if the substrate is not fixed to the pickup but fixed to the lower plate, the cable is prevented from being twisted due to the movement of the pickup, thereby improving the performance of the device.

Claims (4)

Lower and upper plate (1) and the moving means is provided on the pickup body 16 to move the pickup 15 horizontally, and the lower and upper plate (1) (6) Guide means for guiding the pick-up 15 moved by the lower side and rotatably installed at both connecting rods 5 and 5a connecting the lower and upper plates 1 and 6 to turn the pick-up 15. A turning means for allowing the driving means and a power transmission means for transmitting the power of the loading motor 23 to the turning means to rotate the turning means, so that the pickup 15 moves to play the back side after the front side of the disc is played or The pickup moving device of the optical disc player, characterized in that the movement curve of the pickup (15) forms a wedge shape when the player moves predominantly to reproduce the front side after playing the back side. The lower and upper guide rods (2) and (7) of claim 1, wherein the guide means is provided at the lower and upper plates (1) and (6) so that the grooves (17) formed at one side of the pickup body (16) can be fitted. ) And the lower and upper guide rails 3 and 8 installed on the lower and upper plates 1 and 6 so that the protruding pieces 18 formed on the other side of the pickup body 16 can be fitted. A pickup moving device of an optical disc player, which can guide a pickup (15) moved in accordance with the drive of a drive motor (19) installed in a body (16). 2. The turning means according to claim 1, wherein the turning means includes a shaft (10) provided at both side connecting rods (5) (5a), a pair of rotating plates (12) (12a) fixed to the shaft, and one of the rotating plates (12). Fixed to the inner side and fixed to the inner side of the movable rod 11 and the other side of the rotating plate 12a so that the groove 17 formed on one side of the pickup body 16 can be fitted during the horizontal backward movement of the pickup (15) Pick-up moving device of the optical disc player composed of a moving rail (13) to be fitted so that the projecting piece (18) formed on the other side of the pickup body (16) when the horizontal Fuji moving of the pickup (15). According to claim 1, wherein the power transmission means is a drive gear 25 that rotates by receiving the driving force of the loading motor 23 by the belt 24, and the first power transmission gear 26 is engaged with the drive gear to rotate. ), A binder gear 27 meshed with the first power transmission gear and rotated, a tray shift gear 29 for moving the tray 28 while being selectively engaged with the tooth gear, and the binder gear 27 ) And a second power transmission gear 30 that rotates while being in selective engagement, a driven gear 31 that rotates in engagement with the second power transmission gear 30, and a rotational force of the driven gear by the belt 32. Pick-up moving device of the optical disk player consisting of a bevel gear (33) for receiving and rotating the shaft (10).