JPH09147468A - Disk changer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a device capable of preventing a driving source for rotational operation and a transmission mechanism of driving force from damaging by providing a turntable, recording/reproducing part, source of driving force and transmission mechanism having a limiter mechanism. SOLUTION: When a wheel 13 is rotationally operated by a gear 22, and transmitting recessed and projected parts 12, 16 are in the engaged state for each other, the wheel 13 and a limiter ring are integrally rotated. At this time, a gear 1 is also rotationally operated together with the wheel 13 through the limiter ring and a shaft part. The force to make the wheel 13 and the gear 1 rotate each other is exerted between them by a load due to the friction for rotating a table 30, or the like. When this force is smaller than a specified force, a limiter spring is not compressed, and the engaged state of the recessed and projected parts 12, 16 for each other is maintained. When the force to make the wheel 13 and gear 1 rotate each other between them becomes larger than the specified value, the limiter ring, etc., are moved, and the engaged state of the recessed and projected parts 12, 16 for each other is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a disc changer device having a plurality of recording discs mounted thereon and recording and / or reproducing information signals on the recording discs.

[0002]

2. Description of the Related Art Conventionally, there have been proposed disk player devices for recording or reproducing information signals on various types of recording disks such as optical disks, magnetic disks, or magneto-optical disks.

Such a disc player device has a rotating operation mechanism for holding and rotating the recording disc.
A pickup device is arranged so as to face a recording disk which is rotationally operated by the rotary operation mechanism and which writes or reads an information signal to or from the recording disk. When the recording disc is an optical disc, an optical pickup device is used as the pickup device.

Conventionally, a plurality of recording discs can be simultaneously mounted as the disc player device, and one recording disc can be selectively used from these recording discs to record or reproduce an information signal. A structured disc changer device has been proposed.

FIG. 1 shows this disc changer device.
2 and FIG. 13, as shown in FIG.
A disk table 203 in which 1, 102 are positioned and mounted in parallel, and a tray 202 that rotatably supports the disk table 203 and that can be moved in and out of the outer casing 201 are provided. There is one configured.

The turntable 203 has an upper surface,
A plurality of substantially circular disc positioning recesses 2 for positioning the plurality of optical discs 101, 102.
09. When the turntable 203 is rotated, the disc positioning recesses 209 are
The turntable 203 is rotated together with the turntable 203, and moves around the rotation center axis of the turntable 203 in an arcuate locus.

The rotation operation of the turntable 203 is as follows.
This is performed via a driving force transmission mechanism by a driving force generated by a turntable motor 208 serving as a driving force source arranged on the tray 202.

That is, the turntable motor 20
A worm gear 207 is attached to the drive shaft of No. 8. The worm gear 207 meshes with a worm wheel 205 rotatably supported on the tray 202. This worm wheel 205 has a transmission gear 2
06 is integrally mounted coaxially. The transmission gear 206 meshes with the gear portion 204 provided on the turntable 203. This gear part 204
Are formed coaxially with the center of rotation of the turntable 203.

As described above, by constructing the driving force transmission mechanism using the worm gear 207 and the worm wheel 205, it is possible to realize a large reduction ratio with a small number of parts, and the turntable motor 2
There is an advantage that the turntable motor 208 is not rotated by the external force applied to the turntable 203 when the 08 is stopped.

In the disc changer device, the tray 202 is housed in the outer casing 201 and the center of the disc positioning recesses 209 moves when the turntable 203 is rotated. At this position, a disk table that serves as the rotation operation mechanism is arranged. The disc table rotates while holding the optical discs 101 and 102 selected by rotating the turntable 203.

That is, in this disc changer device, in order to record / reproduce information signals on / from the optical discs 101, 102, the optical discs 101, 10 are used.
2 is fitted into one of the disc positioning recesses 209 for positioning, and the turntable 203 is rotated to convey the optical discs 101 and 102 to a position corresponding to the disc table. Then, the optical disks 101 and 102 are rotated.

[0012]

By the way, in the disc changer device as described above, the tray 20 is used.
When 2 is moved to the outside of the outer casing 201, the turntable 203 is rotated by an external force while the turntable motor 208 is stopped,
On the contrary, the turntable 203 may be stopped by an external force even when the turntable motor 208 is rotationally driven.

Thus, when an external force is applied to the turntable 203, this external force is applied between the gear portion 204 and the transmission gear 206 and the worm wheel 2
05 and the worm gear 207. At this time, the tooth portions of the gear portion 204, the transmission gear 206, the worm wheel 205, and the worm gear 207 may be damaged by the external force.

Each of these gears 204, 206, 205, 2
When the tooth portion of 07 is damaged, the turntable 203 cannot be rotated by the driving force of the turntable motor 208, and the optical discs 101 and 102 cannot be inserted into or taken out of the outer casing 201.

Therefore, the present invention is proposed in view of the above situation, and a plurality of recording disks are placed in parallel and rotated to operate one recording disk out of the respective recording disks. A disc changer device having a turntable for performing a selecting operation for selecting,
An object of the present invention is to provide a disc changer device in which damage to a driving force source and a driving force transmission mechanism for rotating the turntable when the turntable is rotated or stopped by an external force is prevented. Is what you are trying to do.

Further, the present invention provides a disc changer device which prevents malfunctions such as contacting recording discs even when the turntable is rotated by an external force in the disc changer device. It aims to solve the issue of provision.

[0017]

In order to solve the above-mentioned problems, a disk changer device according to the present invention is a turntable which is rotatably arranged and has a plurality of disk mounting portions on its upper surface. By rotating this turntable, one of the recording discs mounted on the disc mounting portion of the turntable is selectively corresponded to and the information signal is recorded / reproduced to / from the corresponding recording disc. The recording / reproducing unit, a driving force source that generates a driving force for rotating the turntable, a worm gear, and a worm wheel that meshes with the worm gear, and are configured to include the driving force generated by the driving force source. A drive force transmission mechanism for transmitting to the turntable, and the drive force transmission mechanism is configured to have a limiter mechanism for limiting the maximum value of the transmitted drive force. In which it was decided that.

According to the present invention, in the above disc changer device, the turntable is disposed on the upper surface portion so as to be movable, and the turntable is moved relative to the recording / reproducing portion. A tray to be brought into contact with and separated from the tray, a control means for controlling a movement operation of the tray and a rotation operation of the turntable, and a detection means for detecting a rotation angle position of the turntable on the tray and sending a detection result to the control means. And a storage unit that stores the detection result of the detection unit under the control of the control unit,
The control means detects the rotational angle position of the turntable on the tray by the detection means when the turntable is separated from the recording / reproducing section by moving the tray, and the storage means stores the rotation angle position. When the turntable is stored in memory and the turntable is moved closer to the recording / reproducing unit by moving the tray, the rotation angle position of the turntable on the tray is detected by the detection means, and the detection result is If it is different from the rotation angle position stored in the storage means, the turntable is rotated to match the rotation angle position of the turntable on the tray with the rotation angle position stored in the storage means. After that, the tray is moved and operated.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the disc changer device according to the present invention is configured as a device for reproducing an optical disc which is a recording disc.

As shown in FIG. 9, this disc changer device has an outer casing 40. As shown in FIGS. 1 and 6, a chassis 35 is arranged on the bottom surface of the outer casing 40. On this chassis 35,
A recording / reproducing unit for reading an information signal from the optical disc is provided. The recording / reproducing unit includes a rotary drive mechanism that holds the optical disc and rotates it, and an optical pickup device 38 that faces the optical disc that is rotationally operated by the rotary drive mechanism and reads an information signal from the optical disc. It is configured.

The rotary drive mechanism comprises a spindle motor, a disk table 37 attached to the drive shaft of the spindle motor, and a chucking arm 36 which is operated to come into contact with and separate from the disk table 37. . The disc table 37 has a substantially conical projection at the center portion on the upper surface side so that the optical discs 101 and 102 can be aligned and held by the chucking holes 103 provided in the central portions of the optical discs 101 and 102, which will be described later. Have

Then, the above optical pickup device 38
Is an optical block unit that incorporates a light source such as a laser diode, a predetermined optical device such as a beam splitter or a collimator lens, and a photodetector such as a photodiode, and an objective lens drive mounted on the upper surface of the optical block unit. And a device. This objective lens driving device is configured to movably support an objective lens 39 for condensing the light flux emitted from the optical block section onto the signal recording surface of the optical disc.

The optical pickup device 38 is supported by a guide shaft mounted on the upper surface of the chassis 35, is arranged on the rear side of the disc table 37, and is arranged in a direction to come in contact with and separate from the disc table 37. It can be moved in the front-back direction. In the optical pickup device 38, the objective lens 39 is directed upward, and the optical axis of the objective lens 39 is made substantially parallel to the drive axis of the spindle motor.

This disc changer device is
A plurality of types of optical discs having different diameters can be mounted, and an information signal can be reproduced by selectively using these optical discs.

A plurality of types of optical discs having different diameters which can be mounted on the disc changer device are shown in FIG.
0, a large-diameter optical disc 101 having a diameter of D ₁ ,
Alternatively, it is the small-diameter optical disc 102 shown in FIG. 11 having a diameter of D ₂ .

The large-diameter optical disc 101 is, for example,
It is an optical audio disc with a diameter of 12 cm. The small-diameter optical disc 102 is, for example, an optical audio disc having a diameter of 8 cm. Each of the optical discs 101 and 102 has a chucking hole 103 at the center thereof. It should be noted that each of the optical discs 101 and 102 has a main surface portion on one side as a signal recording surface.

The disc changer device is
As shown in FIG. 1, FIG. 5, and FIG. 7 to FIG.
0, as shown by arrows O and C in FIGS. 1 and 9, an opening 44 provided in the front surface of the outer casing 40.
It has a tray 34 which is arranged so as to be able to appear and disappear through.

The tray 34 is formed in a substantially rectangular flat plate shape, has a main surface in a horizontal state, and is accommodated in the outer casing 40 in the initial state, and is in the disc table 37 and the optical pickup device 38. It is located above. The tray 34 is mounted on the chassis 35 through the opening 44 by the loading motor mounted on the chassis 35 when the optical discs 101 and 102 are attached to and detached from the disc changer device. It is moved so as to project to the front side of 40.

On the upper surface side of the tray 34, a turntable 30 for positioning and mounting the respective optical disks 101, 102 is arranged. That is, the tray 34 is moved to bring the turntable 30 into and out of contact with the recording / reproducing unit. The turntable 30 is formed in a disk shape, and is rotatably supported and disposed on the upper surface of the tray 34 via a support shaft 29, as shown by an arrow R in FIGS. 1 and 9. There is. The support shaft portion 29 is located at the center of the turntable 30.

The turntable 30 is shown in FIGS.
As shown in FIG.
It has a plurality of substantially circular recesses 32 and 33 which serve as disk mounting portions for positioning 02.

That is, a plurality of (three in this embodiment) large-diameter disc positioning recesses 32 corresponding to the diameter of the large-diameter optical disc 101 are formed on the upper surface of the turntable 30. . The large-diameter disc positioning recesses 32 are formed at positions eccentric to the turntable 30, that is, so as to surround the spindle 29 of the turntable 30 from the peripheral side.

A plurality of small-diameter disc positioning recesses 33 corresponding to the diameter of the small-diameter optical disc 102 are formed on the upper surface of the turntable 30 so as to be concentric with the large-diameter disc positioning recesses 32. There is. That is, the small-diameter disc positioning recess 33 is
It is formed on the bottom surface of the large-diameter disc positioning recess 32.

In the tray 34, when the turntable 30 is rotated, the disc positioning recesses 32 and 33 are rotated together with the turntable 30 and circle around the spindle 29 of the turntable 30. Move along an arc-shaped trajectory.

The turntable 30 includes the disc table 37 and the optical pickup device 38 extending from the center of the bottom surface of the disc positioning recesses 32 and 33 to the peripheral edge of the turntable 30. A notch 31 is provided to face the central portion of each of the optical discs 101 and 102 positioned by the disc positioning recesses 32 and 33 and the signal recording area.

The tray 34 is formed with a deficient portion for allowing the rear side portion of the turntable 30 to face the disc table 37 and the optical pickup device 38. This defective portion is formed so as to be a range corresponding to the movable range of the disc table 37 and the optical pickup device 38 when the tray 34 is housed in the outer casing 40.

The turntable 30 includes the tray 3
When 4 is housed in the outer casing 40, one of the disc positioning recesses 32 and 33 and the disc table 37 are in a concentric position. That is,
The disc table 37 corresponds to a position on the movement locus of the rotation of the turntable 30 at the center of the disc positioning recesses 32 and 33 when the tray 34 is housed in the outer casing 40. The position is made.

Therefore, when the tray 34 is housed in the outer casing 40, the turntable 30 is rotated to cause the disc table 37 to correspond to the notch 31. 32 and 33 are selected.

The turntable 30 is rotationally operated by a driving force transmission mechanism by a driving force generated by a turntable motor 27 serving as a driving force source arranged on the tray 34. That is, the drive pulley 26 is attached to the drive shaft of the turntable motor 27. The drive pulley 26 is a driven pulley 2 rotatably disposed on the drive pulley 26 and the tray 34.
Via the endless drive belt 24 wound between 5 and
The driving force is transmitted to the driven pulley 25. The worm gear 22 is attached to the support shaft 23 of the driven pulley 25. The worm gear 22 meshes with the worm wheel 13 rotatably arranged on the tray 34. The outer peripheral surface of the worm wheel 13 is a gear tooth portion 14.

As described above, by constructing the driving force transmission mechanism using the worm gear 22 and the worm wheel 13, a large reduction ratio can be realized with a small number of parts and the turntable motor 27 can be stopped. This turntable motor 27
Is not rotated by the external force applied to the turntable 30.

The worm wheel 13 transmits the driving force to the transmission gear 1 which is rotatably supported coaxially with the worm wheel 13 via a limiter mechanism which limits the maximum value of the driving force to be transmitted. The transmission gear 1 has a gear portion 2 on the outer peripheral edge portion. The gear portion 2 meshes with a gear portion 28 formed on the lower surface of the turntable 30 so as to be coaxial with the turntable 30.

As shown in FIGS. 2 and 3, the limiter mechanism has a shaft portion 5 integrally provided on the transmission gear 1 along the central axis of the transmission gear 1 and the shaft portion 5. A limiter spring, which is a compression coil spring externally fitted, and the shaft portion 5
Limiter ring 8 which is externally fitted and has a transmission uneven portion 12
And a transmission uneven portion 16 provided on the worm wheel 13.

The shaft portion 5 has a support shaft hole 4 into which a support shaft planted on the tray 34 is inserted. By inserting the support shaft into the support shaft hole, the shaft portion 5 is supported by the support shaft together with the transmission gear 1 so as to be rotatable about the shaft. Further, the shaft portion 5 has
It has a plurality of ridges 6 parallel to the axis of the shaft 5.

The limiter spring 7 is supported by fitting one end side thereof into an annular support groove portion 3 formed on the base end side of the shaft portion 5 and the other end side toward the tip end side of the shaft portion 5. ing.

The limiter ring 8 is formed in an annular shape, and has a plurality of groove portions 11 on the inner surface of the inner hole portion 10 along the axis of the limiter ring 8. These groove portions 11 correspond to the ridge portions 6 of the shaft portion 5. That is, the limiter ring 8 is externally fitted to the shaft portion 5 while fitting the protrusion portions 6 into the groove portions 11 in a corresponding manner, and prevents rotation about the shaft portion 5 about the axis. In this state, the shaft 5 can be slid in the axial direction.

The limiter ring 8 has an annular support groove portion 9 on the main surface portion of the shaft portion 5 facing the base end side. The other end side of the limiter spring 7 is fitted into the support groove portion 9. That is, the limiter ring 8 is in a state of being supported by the transmission gear 1 via the limiter spring 7. When the limiter ring 8 is moved in a direction approaching the transmission gear 1, the limiter spring 7 moves. As shown by an arrow A in FIG. 2, the elastic force urges the transmission gear 1 away from the transmission gear 1.

Further, the limiter ring 8 has a transmission uneven portion 12 on the main surface portion facing the tip side of the shaft portion 5. The transmission concave-convex portion 12 is formed by arranging a plurality of radial protrusions centered on the axis of the limiter ring 8 at equal angular intervals.

The worm wheel 13 is formed in a substantially cylindrical shape, and is externally fitted and supported on the shaft portion 5 and the limiter ring 8. The worm wheel 13 is prevented from coming off from the shaft portion 5 by a ring-shaped cap member 17 fixed to the tip portion of the shaft portion 5. The cap member 17 is
It has a ring-shaped engaging projection 18 that fits into an engaging ring 20 provided at the tip of the shaft 5.

That is, the worm wheel 13 is
With respect to the shaft portion 5, while being prevented from moving in the axial direction,
The inner peripheral surface portion 15 is rotatably supported while being in sliding contact with the outer peripheral surface portion of the limiter ring 8.

The worm wheel 13 has a transmission projection 16 which faces the transmission uneven portion 12 of the limiter ring 8. The transmission protrusion 16 is formed on an annular flange portion that protrudes inward from the inner peripheral surface portion 15 of the worm wheel 13. The transmission uneven portion 16 is the transmission uneven portion 12 of the limiter ring 8.
It has a shape similar to that of the worm wheel 13 described above.
A plurality of radial ridges centered on the axis of are arranged at equal angular intervals.

In the state where the worm wheel 13 is locked to the shaft portion 5 by the cap member 17, the limiter spring 7 is moved by the worm wheel 13 via the limiter ring 8 more than the natural state. It is in a compressed state. Therefore, the limiter spring 7 urges the limiter ring 8 to press the transmission uneven portion 12 of the limiter ring 8 against the transmission uneven portion 16 of the worm wheel 13 as shown by an arrow A in FIG. There is. At this time, the respective transmission concave-convex portions 12 and 16 are in mesh with each other as shown in FIG.

In the limiter mechanism constructed as described above, the worm wheel 13 has the worm gear 2
When the rotary operation is performed by 2, the above-mentioned transmission uneven portions 12,
In a state where 16 members are meshed with each other, the worm wheel 13 and the limiter ring 8 are integrally rotated. Therefore, at this time, the transmission gear 1
Is also rotated together with the worm wheel 13 via the limiter ring 8 and the shaft portion 5.

At this time, a force for rotating between the worm wheel 13 and the transmission gear 1 tends to rotate due to a load such as friction generated by rotating the turntable 30. When this force is equal to or less than the predetermined force, the limiter spring 7 is not compressed, and the meshing state of the transmission uneven portions 12 and 16 is maintained.

When the force for rotating the worm wheel 13 and the transmission gear 1 to each other exceeds a predetermined force, the limiter ring 8 compresses the limiter spring 7 and the base of the shaft portion 5 is compressed. Move to the edge,
The meshing of the transmission concave and convex portions 12 and 16 is released. That is, at this time, each of the transmission concave and convex portions 12, 16
In between, the ridges of the two ride on each other, and the worm wheel 13 and the limiter ring 8 are
It will be in the state which mutually idles. In this way, the maximum value of the transmitted driving force is limited in this driving force transmission mechanism.

Therefore, the above turntable motor 2
The turntable 30 is rotated by an external force when the turntable 30 is stopped, or when the turntable motor 27 is rotationally driven.
When the gear is stopped by an external force, the transmission gear 1 and the worm wheel 13 idle, so that the gear tooth portion 14 of the worm wheel 13 and the transmission gear 1
Damage to the gear portion 2 is prevented.

The turntable 30 is provided with a disc detection sensor located in each disc positioning recess 33. These disc detection sensors detect whether or not the optical discs 101, 102 are present in the respective disc positioning recesses 32, 33. This disc detection sensor is, for example, an optical sensor, has a light emitting element and a light receiving element, and receives the light beam reflected by the optical discs 101 and 102 located in the disc positioning recess 33 of the light beam emitted from the light emitting element. It is detected by an element.

The result of detection by the disc detection sensor is sent to the control circuit section which serves as the control means of the disc changer device. The control circuit unit is configured to have a CPU (Central Processor Unit) and controls the movement operation of the tray 34 and the rotation operation of the turntable. That is, this control circuit unit controls the driving of the loading motor and the turntable motor 27.

Further, on the tray 34, there is provided a turntable position detecting sensor which is a detecting means for detecting the rotational angle position of the turntable on the tray 34 and sending the detection result to the control circuit section. There is. On the lower surface of the turntable 30, there is provided a piece to be detected 45 which is to be detected by the turntable position detecting sensor. The detected pieces 45 are associated with the respective disc positioning recesses 32 and are formed in different shapes (for example, shapes having different numbers of slits) so that they can be distinguished from each other. There is.

The turntable position detecting sensor is, for example, an optical sensor, and is configured to have a light emitting element such as an LED (light emitting diode) and a light receiving element such as a PD (photodiode). The light receiving element detects the reflected light (or the reflected light) of the emitted luminous flux by the detected piece 45.

A memory (RAM) is connected to the control circuit section, which serves as storage means for storing the detection results of the sensors controlled by the control circuit section.

The control circuit section, based on the detection output from each of the sensors and the operation signal generated in response to the manual operation by the operation sections 41 and 43 provided on the front surface of the outer casing 40, The loading motor and the turntable motor 27 are drive-controlled. That is, when the loading operation is instructed through the operation sections 41 and 43, the control circuit section pulls the tray 34 into the outer casing 40, and the unloading operation is performed through the operation sections 41 and 43. When instructed, the tray 34 is moved so as to project to the front side of the outer casing 40.

A display section 42 for displaying the operation status of the disk changer device is provided on the front surface of the outer casing 40.

The control circuit section moves the tray 34 away from the recording / reproducing section by moving the tray 34, that is, moves the tray 34 to the outside of the outer casing 40. At this time, the rotational angle position of the turntable 30 on the tray 34 is detected by the turntable position detection sensor and stored in the memory.

Then, the control circuit section is provided with the tray 3
When the turntable 30 is moved closer to the recording / reproducing section by moving the tray 4, that is, the tray 3
4 is stored in the outer casing 40, the rotation angle position of the turntable 30 on the tray 34 is detected by the turntable position detection sensor, and the detection result is stored in the rotation angle stored in the memory. Compare with position. If the detection result at this time matches the rotation angle position stored in the memory, the control circuit unit drives the loading motor. If the detection result at this time is different from the rotation angle position stored in the memory, the turntable 30 is rotated to determine the rotation angle position of the turntable 30 on the tray 34 in the memory. After matching the rotation angle position stored by, the loading motor is driven to move the tray 34.

Therefore, in this disc changer device, after the tray 34 is moved to the outside of the outer case 40, the turntable 30 is driven by the turntable motor 27 or by an external force. Even when rotated, when the tray 34 is returned into the outer casing 40, the turntable 30 is
The tray 34 is returned to the rotation angle position before being moved to the outside of the outer casing 40.

In the disc changer apparatus according to the present invention having the above-described structure, when reproducing the large-diameter or small-diameter optical discs 101 and 102, first, the unloading operation is instructed by the operating portions 41 and 43. Then, the tray 34 is projected to the front side of the outer casing 40. The control circuit unit determines whether or not there is an instruction for the unloading operation, and if there is an instruction for the unloading operation, drives the loading motor to execute the unloading operation.

At this time, as described above, the control circuit section detects the rotational angle position of the turntable 30 on the tray 34 by the turntable position detection sensor and stores it in the memory.

Then, the large-diameter or small-diameter optical discs 101 and 102 are fitted and positioned in the large-diameter or small-diameter disc positioning recesses 32 and 33, respectively. In the disc changer device, as shown in FIG. 9, even when the tray 34 is projected to the front side of the outer casing 40 by about half, by rotating the turntable 30, all the The large-diameter or small-diameter optical discs 101 and 102 can be sequentially mounted in the disc positioning recesses 32 and 33.

Then, when a loading operation is instructed by the operation portions 41, 43, the tray 34 is stored in the outer casing 40. That is, the control circuit section determines whether or not the loading operation is instructed, and if the loading operation is instructed, the loading motor is driven to execute the loading operation.

At this time, the control circuit section detects the rotational angle position of the turntable 30 on the tray 34 by the turntable position detection sensor as described above, and the detection result is stored in the memory. The rotation angle position. If the detection result at this time matches the rotation angle position stored in the memory, the control circuit unit drives the loading motor. If the detection result at this time is different from the rotation angle position stored in the memory, the turntable 30 is rotated to store the rotation angle position of the turntable 30 on the tray 34 in the memory. The driving motor is driven after the rotation angle position is matched.

The control circuit section detects the presence / absence of the optical disks 1901, 102 in the disk positioning recesses 32, 33 by the disk detection sensor, and stores the detection result in the memory.

When the loading operation is completed, one of the large-diameter or small-diameter optical disks 101 and 102 on the turntable 30 has the chucking hole 103 opposed to the disk table 37.

Then, the control circuit section starts the chucking operation. That is, at least one of the tray 34 and the disc table 37 is moved in a direction in which the tray 34 and the disc table 37 are relatively close to each other, and the disc table 37 is cut out of the disc positioning recesses 32, 33. It is inserted into the portion 31.

Then, the disk table 37 is provided on the optical disk 10 in the peripheral portion of the chucking hole 103 of the large-diameter or small-diameter optical disks 101 and 102.
1, 102 are held in cooperation with the chucking arm and are rotated.

In the optical pickup device 38, the objective lens 39 is inserted into the optical disc 101 or 102 having the large diameter or the small diameter via the defective portion and the cutout portion 31.
The optical discs 101 and 102 can be made to face each other over their inner and outer peripheries, and information signals are read out over the entire signal recording surfaces of the optical discs 101 and 102.

When the reproducing operation is being executed in this manner, the optical disk 1 which is performing the reproducing operation.
01 and 102 are located above the turntable 30 and apart from the turntable 30. At this time, the tray 34 can be moved to the outer side of the outer casing 40 while leaving the optical discs 101 and 102 being played back on the disc table 37. In this way, when the tray 34 is moved to the outer side of the outer casing 40, another disc positioning of the disc positioning recesses 32, 33 on which the optical discs 101, 102 being reproduced are placed. With respect to the recesses 32 and 33, the optical disks 101 and 102 can be placed, taken out, and replaced.

In this disc changer device, during the reproduction operation of one optical disc 101, 102, the turntable 30 is rotated to place or replace another optical disc 101, 102 on the turntable 30. Even if it is carried out while the tray 34 is being moved,
When it is returned to 0, the turntable 30 is returned to the rotation angle position before the tray 34 is moved to the outer side of the outer casing 40, so that the optical disks 101 and 102 may collide with each other. There is no.

In this disc changer device, the tray 34 is moved to the outer side of the outer casing 40 during the reproduction operation of one of the optical discs 101 and 102, so that all of the parts on the turntable 30 are moved. Of the optical discs 101, 102 on the disc positioning recesses 32, 33 of
If the tray has been placed, the control circuit unit does not return the tray 34 into the outer casing 40.

In this disc changer device, the tray 34 and the disc table 37 are separated from each other so that the disc table 37 and the chucking arm 36 form the respective optical discs 101,
The holding of the tray 102 is released, and the tray 34 is moved to the outer casing 4
By projecting it to the front side of 0, each optical disk 1
01 and 102 can be taken out to the outside of the outer casing 40.

In this disc changer device, the optical discs 101, 41 mounted on the turntable are operated by operating the operating portions 41, 43.
It is possible to instruct selection of one optical disk to be reproduced from among 102.

The disc changer device according to the present invention is not limited to the device for reproducing only the information signal from the optical disc as shown in each of the above-mentioned embodiments, and various optical discs, magneto-optical discs, or It can be configured as an apparatus for recording and reproducing information signals using a magnetic disk or the like.

[0082]

As described above, in the disc changer device according to the present invention, the driving force transmitting mechanism for transmitting the driving force generated by the driving force source to the turntable having the plurality of disc mounting portions on the upper surface thereof. Is configured with a limiter mechanism that limits the maximum value of the transmitted driving force.

That is, the present invention is a disc changer device having a turntable that allows a plurality of recording discs to be placed in parallel and rotated to perform a selection operation of selecting one recording disc from the recording discs. A disk changer device is provided in which the driving force source and the driving force transmission mechanism for rotating the turntable when the turntable is rotated or stopped by an external force is prevented from being damaged. Is what you can do.

Further, according to the present invention, in the disc changer device, the turntable can be brought into contact with and separated from the recording / reproducing section, and a control means for controlling a moving operation and a rotating operation of the turntable is provided. The control means stores a rotation angle position of the turntable when the turntable is separated from the recording / reproducing section, and rotates the turntable when the turntable approaches the recording / reproducing section. When the angular position is different from the stored rotational angular position, the turntable is rotated to match the rotational angular position of the turntable with the stored rotational angular position.

That is, the present invention is a disc changer device having a turntable that allows a plurality of recording discs to be placed in parallel and rotated so as to perform a selecting operation of selecting one of the recording discs. Even when the turntable is rotated by an external force, it is possible to provide a disc changer device in which the occurrence of a malfunction such as bringing the recording discs into contact with each other is prevented.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing the configuration of a disc changer device according to the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a limiter mechanism which is a main part of the disc changer device.

FIG. 3 is a vertical sectional view showing the configuration of the limiter mechanism.

FIG. 4 is a vertical cross-sectional view showing a configuration of a main part of the limiter mechanism.

FIG. 5 is a plan view showing a configuration of a turntable of the disc changer device.

FIG. 6 is a plan view showing a configuration of a chassis of the disc changer device.

FIG. 7 is a side view showing a configuration of a turntable of the disc changer device.

FIG. 8 is a front view showing a configuration of a turntable of the disc changer device.

FIG. 9 is a perspective view showing a configuration of the disc changer device.

FIG. 10 is a perspective view showing the configuration of a large-diameter optical disc used in the disc changer device.

FIG. 11 is a perspective view showing a structure of an optical disc having a small diameter used in the disc changer device.

FIG. 12 is a perspective view showing a configuration of a conventional disc changer device with a part thereof cut away.

FIG. 13 is a plan view showing a configuration of a turntable of the conventional disc changer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 transmission gear 7 limiter spring 8 limiter ring 12 transmission uneven portion 13 worm wheel 16 transmission uneven portion 22 worm gear 27 turntable motor 28 gear portion 29 support shaft portion 30 turntable 32 large diameter disc positioning recess 33 small diameter disc positioning recess 35 disc tray 37 Disc table 38 Optical pickup device 101 Large-diameter optical disc 102 Small-diameter optical disc

Claims (2)

[Claims] 1. A turntable which is rotatably arranged and has a plurality of disc mounting portions provided on an upper surface thereof, and a disc mounting portion of the turntable which is rotated by rotating the turntable. One of the mounted recording discs is selectively supported, and a recording / reproducing unit for recording / reproducing information signals to / from the corresponding recording disc, and a driving force for rotating the turntable are generated. A driving force source, a worm gear, and a worm wheel that meshes with the worm gear, and a driving force transmission mechanism that transmits the driving force generated by the driving force source to the turntable. The mechanism is a disc changer device having a limiter mechanism for limiting the maximum value of driving force to be transmitted. 2. A tray in which a turntable is disposed on an upper surface portion so as to be movable, and a tray for moving the turntable to and from the recording / reproducing unit by the movement operation, and a movement operation of the tray. And control means for controlling the rotation operation of the turntable, detection means for detecting the rotation angle position of the turntable on the tray and sending the detection result to the control means, and the detection under the control of the control means. A storage means for storing the detection result of the means, wherein the control means is configured to move the tray to separate the turntable from the recording / reproducing unit, and the rotation angle of the turntable on the tray. The position is detected by the detecting means and stored in the storage means, and the turn operation is performed by moving the tray. When the table is brought closer to the recording / reproducing unit, the rotation angle position of the turntable on the tray is detected by the detection means, and if the detection result is different from the rotation angle position stored in the storage means. The tray is moved after the turntable is rotated to match the rotation angle position of the turntable on the tray with the rotation angle position stored by the storage means. 1. The disc changer device according to 1.