JPS63298793A - Recording disk reproducing device - Google Patents

Abstract

PURPOSE:To save the number of components by using a single means to clip a recording disk on a turntable and to apply position adjustment of a pickup. CONSTITUTION:A disk 27 is clipped by moving a 1st chassis 10 and the position of the pickup 2 is adjusted by the same drive motor 5. That is, the motor 5 is driven in the reproducing state and the pickup 2 reads a signal on the disk 27, if the distance between the disk 27 and the pickup 2 is fluctuated due to the surface deflection of the disk 27, the 2nd subchassis 10 is driven by moving a slide plate 14 to make the distance between the pickup 2 and the disk 27 constant thereby allowing stable reproduction. Thus, the mechanism constitution of the device is simplified and the number of components is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to recording of audio and video signals on a recording disc (for example, a compact disc, a laser disc, an optical disc, etc., hereinafter referred to as a disc) on which audio and video signals are recorded. The present invention relates to a recording disk reproducing device that performs reproduction.

Conventional technology Traditionally, video discs and compact discs have the 7th disc.
Many devices employ a loading mechanism as shown in FIGS. 8 and 8 and a pickup position adjusting means as shown in FIG. That is, the tray 8o moves in the Y direction in the figure through the opening 87 provided on the front side of the outer device 4,
Transfer the disc 9 (dotted chain line) to be used into the device,
Then, the tray 80 descends in the z2 direction and
The center hole 79& of 9 engages with the turntable 81, and then the clamp plate 86 is lowered, as shown in FIG.
8 presses the disk 79 and is held between a turntable 81 and a clamper 88, and the disk 79 is rotated by a motor 89. FIG. 8 illustrates the above operation. After the disk 79 is placed on the tray 80 by the user as shown in FIG. The positions are concentric and face each other. Then, the tray 80 descends in the z2 direction, and then the clamp plate 86
is lowered to the state shown in Fig. 8C. In this state, tray 8
o and the disk 79 are separated, and the motor 89 can rotate the disk 79 without any hindrance.

Next, a conventional pickup position adjusting means will be explained using FIG. 9. 90 is a chassis on which a motor 89 and a pickup chassis 91 are mounted. The pickup chassis 91 is rotatably supported by a shaft 92 provided on the chassis 90. 93 is a pickup chassis driving motor fixed to the chassis 90, and a worm 94 is fixed to the shaft 9e of the motor 93. The pickup chassis 91 is provided with a gear e6 that meshes with the worm 94, and as the drive motor 93 rotates, the gear 96 is sent by the worm 94, so that the entire pickup chassis 91 is moved around the shaft 92 in the direction of arrow M. - Rotate in the M2 direction.

Next, its operation will be explained. If the positional relationship between the disc 79 and the pickup 86 changes during playback due to surface wobbling of the disc 79, etc., and if this condition is detected (for example, a shift in focus), the drive motor 93 is rotated to move the pickup chassis 91 in the direction of the arrow. Senior.

Alternatively, by rotating in the direction of arrow M2 and adjusting the positional relationship between the pickup 86 and the disk 79, stable signal reproduction can be achieved.

Problems to be Solved by the Invention However, in the above configuration, for example, the operation of moving the clamp plate 86 in the vertical direction (Z2 direction) within the apparatus is mechanically complicated. Furthermore, moving the clamp plate uses a separate drive motor that is independent of the pickup position adjusting means, which complicates the mechanism of the device, requires a large number of parts, and is costly.

In view of the above problems, the present invention simplifies the mechanical configuration of the device,
The present invention provides a recording disk reproducing device that can reduce the number of parts.

Means for Solving the Problems In order to solve the above-mentioned problems, the recording disk reproducing apparatus of the present invention includes a first sub-chassis that is movably supported by a chassis that constitutes the main body of the recording disk reproducing apparatus, and a second sub-chassis rotatably supported by the chassis;
A turntable for mounting and rotating the recording disk and a motor for rotating the turntable are provided on the first sub-chassis, and a pickup for reading signals from the recording disk and a transport means for transporting the pickup are provided on the first sub-chassis. 2, and has two states: a state in which the second subchassis is rotated at the same time as the first subchassis is raised and lowered, and a state in which only the second subchassis is rotated. a rotatable clamper provided facing the turntable; and a holding means for holding the clamper at a position substantially concentrically facing the turntable.

Operation According to the present invention, with the above-described configuration, the disk can be held by moving the first sub-chassis, and furthermore, the position of the pickup can be adjusted by the same drive motor.

Embodiment Hereinafter, a recording disk reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

An embodiment of the present invention is shown in FIG. In the figure, 1 is a main chassis that constitutes the main body of the device. 2 is a pickup for reading the audio and video signals of the disc, and 6 is a turntable on which the disc is placed. 6 is turntable 6
It is a motor that rotates. 4 is a first sub-chassis on which a motor 6 is mounted, and a row 27 is provided.

Reference numeral 8 denotes a center boss, which centers the disc placed on the turntable 6. 9
is a guide shaft that rotatably supports the first sub-chassis 4 and the second sub-chassis 10.

A pickup 2 is mounted on the second subchassis 10. 11 is a slope provided on the second sub-chassis 1o, and comes into contact with a roller 16, which will be described later. Reference numeral 12 denotes a tray for transferring the disk, and a plurality of disk guides 13 are provided for holding the disk during transfer. A slide plate 14 rotates the first sub-chassis 4 and the second sub-chassis 1o around the guide shaft 9, and is provided with a block 15 and a row 516. block 16
contacts the roller 7 provided on the first sub-chassis 4 to rotate the first sub-chassis 4, the roller 16 contacts the slope 11 provided on the second sub-chassis 1o,
This allows the second sub-chassis 1o to rotate. In addition, in FIG. 3, 18 is a clamp plate fixed to the main chassis 1. A clamper 3 is rotatably held by the clamp plate 18 and clamps the disk 27 with the turntable 6.

Next, the elevating means will be explained in detail with reference to FIGS. 2 and 3 to 6. A rack 17 is provided on the slide plate 14. 21 is a motor for moving the slide plate, and a worm 20 is provided. The worm 20 meshes with the gear 19.

The gear 19 meshes with the rack 17, and as the motor 21 rotates, the rack 17 moves and the slide plate 14 moves to the sixth position.
Move in the z, -22 direction shown in the figure.

FIG. 6 shows the slide plate 14 in a standby position. That is, the roller 7 is not in contact with the block 16, and the roller 16 is not in contact with the slope 11 either. From this state, the motor 21 rotates, and the slide plate 14 moves 2.
When the block 16 and the row 216 move in the direction, the first sub-chassis 4 and the second sub-chassis 10 are rotated by moving the roller 7 and the slope 11, respectively. In Figure 6, the disc 27 is the turntable 6.
The state shown is that it is placed on top. Roller 7 is block 16
The block 16 is located on the upper smooth part of 2. -2
Even if the roller 7 moves within the width of the smooth part in two directions,
The position of does not change. Therefore, the first subchassis 4
does not rotate, and the positional relationship between the turntable 6 and the disk 27 is maintained. However, when the row 216 moves in the state shown in FIG. 6, the second sub-chassis 1° rotates up and down due to the stone wheel whose fulcrum length with the guide shaft e changes. That is, the second sub-chassis can be rotated 1° without changing the position of the turntable 6, and the position of the pickup 2 can be adjusted.

Next, the tray 12 will be explained using FIGS. 2, 3, and 4. 24 is the motor for moving the tray, gear 2
The rotation is transmitted to gear 2 by the shaft 23.
2, and the gears 22 and 26 are configured to rotate in synchronization. (Figure 2). FIG. 3 shows the structure of the gear 22 and the tray 12 in detail. The tray 12 is provided with a tray rack 28, and the tray rack 28 forms a rack-pinion relationship with the gear 22. Therefore, as the motor 24 rotates, the tray 12 moves to z
, -22 direction.

Next, operations from disk insertion to playback to ejection will be explained step by step with reference to FIGS. 3 to 6.

FIG. 3 shows the standby state waiting for the insertion of a disc.

In this state, when the disk insertion switch (not shown) provided on the device is pressed, the ray 12 is inserted into the 2. transported in the direction. Then, the disk 27 can be placed in the state shown in FIG. The first sub-chassis 4 is located at the lower part of the apparatus so as not to interfere with the movement of the tray 12 and the disk 27. Next, when the disc 27 is placed on the disc guide 13 on the tray 12 and a play button (not shown) is pressed, the motor 24 is reversed.
The tray 12 is transferred together with the disk 27 in the 22 direction and stored in the apparatus, and the motor 24 is stopped at a position where the center of the disk 27 substantially coincides with the center of the turntable 6. The state is shown in FIG. Next, as the motor 21 rotates, the slide plate 14 moves in the 21 direction, and the first sub-chassis 4 and the second sub-chassis 10 rotate, resulting in the state shown in FIG. 6. That is, the disc 27 is pushed up by the turntable e and separated from the disc guide 13. The disk 27 is held between the turntable 6 and the clamper 3, and is in a stable rotatable state. This state is the playback state. In this state, the motor 5 rotates and the pickup 2 reads the signal from the disk 27. However, if the distance between the disk 27 and the pickup 2 changes due to surface runout of the disk 27, etc., the slide plate 14 should be moved. By moving the second sub-chassis 1o, the second sub-chassis 1o is rotated, and the pickup 2
By keeping the distance between the disc 27 and the disc 27 constant, stable reproduction can be performed.

Next, the extraction operation will be explained. When the playback is finished, the motor 21 rotates, the slide plate 14 moves in the 22 direction, and the first sub-chassis 4 and the second sub-chassis 1o rotate, so that the disk 27 descends and returns to the tray. It is placed on a disc guide 13 provided at 12.

This state is the state shown in FIG. Next, the motor 24 rotates, and the tray 12 moves 2. The disk 27 is transferred in the direction shown in FIG. 4, the disk 27 is taken out, and the tray storage switch 'I
When F- (not shown) is pressed, the motor 24 rotates in reverse, and the tray 12 is transferred in the z2 direction, resulting in the state shown in FIG. 3, and disk collection is completed.

Effects of the Invention As described above, according to the present invention, the first sub-chassis is supported so as to be movable up and down, and the second sub-chassis is supported so as to be rotatable, on the chassis constituting the main body of the recording disc playback device. a turntable on which the recording disk is placed and a motor for rotating the turntable are provided on the first subchassis, a pickup for reading signals from the recording disk, and a transport means for transporting the pickup. It is provided on the second sub-chassis and has two states: a state in which the second sub-chassis is rotated at the same time as the first sub-chassis is raised and lowered, and a state in which only the second sub-chassis is rotated. By providing a lifting means having a position, a rotatable clamper provided facing the turntable, and a holding means holding the clamper at a position substantially concentrically facing the turntable, a single holding the recording disc on the turntable by means of;
The position of the pickup can be adjusted, and the number of parts and cost of the recording disk reproducing apparatus can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a recording disk reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIGS. 3 to 6 are side sectional views for explaining the operation, and FIG. An explanatory perspective view and a side view of a conventional example, FIG. 8A. 9 is a side sectional view for explaining the operation of the conventional example, and FIG. 9 is a side view for explaining the mechanism of the conventional example. 1...Main chassis, 2...Pickup, 4...First sub-chassis, 6...
...Motor, 6...Turntable, 1o.
...Second sub-chassis, 14...Slide board 〇 Name of agent Patent attorney Satoshi Nakao Isamu and 1 other person IQ
---72J Pubshi I3-11 Disc force °I L" 5 °-Sc Al, 'Main tile 15・--Boo-17 Fig. 6 79--D 7ri 7de α-11 IU Figure 8
84-～-Tato cum 8 toe otsu izo 2 up. 85--kunwa・, provisional 89-i-da-

Claims (1)

[Claims] A turntable on which a recording disk is placed, and the turntable includes a first sub-chassis that is supported so as to be movable up and down on a chassis constituting a main body, and a second sub-chassis that is rotatably supported on the chassis. A motor for rotating the recording disc is provided on the first sub-chassis, a pickup for reading a signal from the recording disk and a transport means for transporting the pickup are provided on the second sub-chassis, and a motor for rotating the first sub-chassis is provided on the second sub-chassis. A recording disk reproducing device provided with an elevating means having two states: a state in which the second sub-chassis is rotated at the same time as the second sub-chassis is raised and lowered, and a state in which only the second sub-chassis is rotated.