JPH0447795Y2 - - Google Patents

Description

[Detailed Description of the Invention] 〓Field of Industrial Application〓 The present invention relates to a disk-type recording/reproducing device. The present invention relates to a device that carries a disc-shaped recording medium to a reproduction position and performs recording or reproduction while rotationally driving a disc-shaped recording medium by a motor.

〓Summary of the invention〓 The present invention is provided with a means for moving the tray, and is configured to drive the means for moving by a motor for rotationally driving a disk-shaped recording medium. This eliminates the need for a dedicated motor for moving the tray.

〓Prior Art〓 In a disc-type playback device such as a video disc player, a video disc is placed on a tray that is pulled out, and the video disc is moved to a play position by pulling in the tray. At this position, signals are read while the video disk is rotated by a spindle motor, thereby performing a reproduction operation. When the playback is finished, the tray is pulled out again and the video disc is removed from the tray.

〓Problems to be Solved by the Invention〓 Accordingly, such a conventional video disc player requires a spindle motor for rotating the video disc at the play position, and a spindle motor for rotating the video disc at the play position, and a drive for moving the tray on which the video disc is placed to the play position. A motor is required to provide a drive source for retracting the tray or moving the tray from the play position to the pull-out position. Therefore, as the number of motors increases, and if the tray is directly moved by the motor, the tray moves at a faster speed, and therefore a deceleration means is required to reduce the rotational speed of the motor. Therefore, there is a problem that the cost of the device increases.

The present invention was developed in view of these problems, and it reduces the number of motors and
It is an object of the present invention to provide a disk type recording/reproducing device in which a deceleration means for reducing the speed at which a tray is moved can be omitted.

<Means for solving the problem> In the present invention, a disc-shaped recording medium is placed on a tray, and the disc-shaped recording medium is conveyed to a reproduction position by moving this tray, and the disc-shaped recording medium is transported to a reproduction position. A disk-type recording and reproducing apparatus configured to rotationally drive the disk-shaped recording medium to perform recording or reproduction, comprising: a motor for rotationally driving the disk-shaped recording medium at the playback position; a rack provided on the tray; a pinion that engages and rotates and horizontally moves the tray between a position where the disk-shaped recording medium is placed and a position where it is retracted into the apparatus main body; and a drive gear that rotates together with the motor. a switching gear configured to transmit rotational motion of the motor to the pinion via a belt so as to be engaged and move the tray; the switching gear is rotatably supported and the tray is connected to the device; The slide member may be provided with a slide member that moves in synchronization with the lowering operation of the tray to the playback position by the lowering means after being drawn into the main body, and releases the engagement between the drive gear and the switching gear. The present invention relates to a characteristic disk type recording/reproducing device.

〓Operation〓 When a disk-shaped recording medium is placed on the tray that has been pulled out and the motor is driven in this state, the rotation of this motor is transmitted to the tray through a drive gear, a switching gear, a belt, and a pinion. This causes the tray with the rack to be transported to the playback position. When the tray is drawn into the main body of the apparatus, the tray is lowered to the playback position by the lowering means. The slide member moves in conjunction with this downward movement of the tray and disengages the drive gear from the switching gear, thereby causing the tray to transport the disk-shaped recording medium to the playback position. It starts to stop. Therefore, recording or reproduction is performed by the disk-shaped recording medium at this position. Further, when ejecting the disk-shaped recording medium, the operation opposite to the above is performed.

〓Example〓 The present invention will be described below with reference to an illustrated example.
FIGS. 1 and 2 show a disc-type playback device according to an embodiment of the present invention, and this device is equipped with a tray 10 on which a video disc is placed. The tray 10 is supported by a guide means (not shown) so as to be movable in the left and right directions in FIG. This tray 10 has circular recesses 11 and 12 formed therein. The inner recess 11 is
This is for placing a 20 cm disk, whereas the outer recess 12 is designed for placing a 30 cm disk. Also, tray 10 has a U
A letter-shaped notch 13 is formed, and a turntable 1 is mounted on the main body side so as to face this notch 13.
4 is placed. Note that a center guide 15 is provided at the center of the turntable 14.

Turntable 1 with center guide 15
4 is supported by a spindle 17 that constitutes the output shaft of a spindle motor 16 shown in FIG. The spindle motor 16 has a flange 18 made of a damping steel plate at its upper end, and is fixed to the main chassis 20 with screws 19 via the flange 18 of the damping steel plate. Therefore, the vibration-damping steel plate 18 blocks the vibration of the motor 16 from being transmitted to the main chassis 20.

A drive gear 2 is provided on the bottom surface of the turntable 14.
1 is formed, and this drive gear 21 is adapted to mesh with a switching gear 22. A pulley 23 is provided on the switching gear 22. The pulley 23 connects to the pulley 25 via the belt 24.
It is reported that. The pulley 25 is integrally provided with a pinion 26 which is engaged with a rack 9 formed on the side of the underside of the tray 10.

The switching gear 22 is rotatably supported by a slide plate 27 shown in FIG. 1 via a support shaft 28. As shown in FIG. A pair of elongated holes are formed in the slide plate 27, and these elongated holes are connected to the pins 29, 30.
is engaged with. Furthermore, the slide plate 27 is pulled upward in FIG. 1 by a tension coil spring 31. Further, the pin 32 implanted in the slide plate 27 is in contact with the inclined surface 34 of the switching plate 33. The switching plate 33 includes a pair of elongated holes, and these elongated holes are engaged with pins 35 and 36, respectively.

In the above configuration, when performing a playback operation using this disk type playback device, the first
A video disc is placed on the tray 10 that has been pulled out as shown in the figure. The video disc will be placed in the recess 11 or 12 depending on its size. When a loading button (not shown) is pressed, the spindle motor 16 is rotated.
This motor 16 is equipped with a servo circuit for controlling the number of rotations of the disk, and this circuit drives the motor 16 at a low speed. That is, for example, it will be rotated at a rotation speed of 3 RPM. This rotation is transmitted to the tray 10 via the drive gear 21, switching gear 22, pulley 23, belt 24, pulley 25, pinion 26, and rack 9 of the turntable 14. Therefore, the tray 10 moves rightward from the position shown by the solid line in FIG. 1 and is drawn into the position shown by the chain line.

When the tray 10 is retracted to the retracted position, the third
As shown in the figure, the turntable 14 is located at the innermost part of the notch 13 of the tray 10, and at the same time the tray 10 is lowered by a lowering means (not shown). In synchronization with this downward movement, the switching plate 33 moves to the left as shown in FIG. Therefore, the pressing of the pin 32 by the inclined surface 34 of the switching plate 33 is released, and the slide plate 27 is thereby pulled by the tension coil spring 31 and moved upward as shown in FIG. I will have to move. Therefore, the switching gear 22 supported by the slide plate 27 via the support shaft 28 is separated from the drive gear 21, thereby stopping the movement of the tray 21.

When the tray 10 has been completely retracted and the video disc has been moved to the play position, in this state the spindle motor 16
The turntable 14 is driven at high speed.
That is, the signal recorded on the video disk is now played back while driving the motor 16 at a rotation speed of, for example, 1800 RPM by the servo circuit. As a result, a predetermined reproduction operation is performed.

When this playback operation is completed, the motor 16 stops rotating the video disk, and the switching gear 22 is engaged with the drive gear 21, and the motor 16 is driven at a low speed to move the tray 10 into the above-described operation. On the contrary, move it to the drawer position. Therefore, at this time, the motor 16 is driven in the opposite direction to that in the case of retraction. This results in a return to the initial state shown in FIG.

Therefore, according to such a reproducing device, tray 1
The spindle motor 16 can also be used as a drive means for moving the tray 16, thereby making it possible to omit a dedicated motor for moving the tray 16. Also, the tray 1 is moved while the motor 16 is being driven at low speed by its servo circuit.
Since it becomes possible to perform zero movement, there is no need for a deceleration mechanism for the movement of the tray 10.

Moreover, the spindle motor 16 is composed of a low-noise motor;
Since the rotation of the tray 10 is transmitted to the tray 10 via the belt 24, the noise generated when the tray 10 is moved is reduced. Also motor 1
Since a flange 18 made of a vibration-damping steel plate is interposed between the main chassis 20 and the vibration-damping steel plate 18, the vibrations of the motor 16 are absorbed by the vibration-damping steel plate 18, which particularly reduces the generation of secondary noise. will be prevented. Further, a belt 24 that transmits the rotation of the motor 16 to the tray 10 is wrapped around a pulley 23. As shown in FIG. 3, when the pulley 23 is not in operation, it moves to a position close to the pulley 25, and the tension on the belt 24 is relieved. This allows the belt 24
This makes it possible to extend the service life of the

Effects of the invention As described above, in the present invention, since the tray is moved by the motor that rotates the disk-shaped recording medium at the playback position, a special device for moving the tray is used. No need for a motor.

Further, according to the present invention, the tray is provided with a rack that is engaged with a pinion driven by a motor that rotates the disk-shaped recording medium, and the tray is moved via such a rack. This makes it possible to reduce the driving force or torque and eliminates the need for a speed reduction mechanism.

Further, according to the present invention, since the engagement between the drive gear and the switching gear is released by the slide member that moves in conjunction with the downward movement of the retracted tray to the playback position, these There is no need to rotate the drive gear or the switching gear by a predetermined angle in order to engage the driving gear and the switching gear, and there is no need for operating means for this purpose.

Furthermore, according to the present invention, the rotation of the switching gear rotationally driven by the motor is transmitted to the pinion via the belt, and this pinion drives the rack of the tray. This will help reduce noise.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main part of a disk-type recording and reproducing device according to one embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the main part, and Fig. 3 is a plan view of the main part with the tray retracted. The reference numerals used in the drawings are: 9 ... rack, 10 ... tray, 14 ... turntable,
16: spindle motor; 21: drive gear;
22: switching gear; 23: pulley; 24:
Belt, 25...pulley, 26...pinion, 2
7: slide plate; 31: tension coil spring;
33: switching plate, 34: inclined surface.

Claims (1)

[Claims for Utility Model Registration] A disc-shaped recording medium is placed on a tray, and by moving this tray, the disc-shaped recording medium is conveyed to a reproduction position, and at this reproduction position, the disc-shaped recording medium is In a disk-type recording and reproducing apparatus that performs recording or reproduction by rotationally driving the disk-shaped recording medium, the disk-shaped recording medium is rotated by being engaged with a motor that rotationally drives the disk-shaped recording medium at the playback position and a rack provided on the tray. At the same time, a pinion that horizontally moves the tray between a position where the disk-shaped recording medium is placed and a position where it is pulled into the apparatus main body, and a pinion that engages with a drive gear that rotates together with the motor to move the tray. a switching gear configured to transmit the rotational motion of the motor to the pinion via a belt in order to move the tray; A disk type recording device comprising: a slide member that later moves in synchronization with the lowering operation of the tray to the playback position by the lowering means, and releases the engagement between the drive gear and the switching gear. playback device.