JPH117697A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the easy taking out of a desired disk placed on a turntable without requiring the complicated operation for the user in a disk reproducing device provided with a drawer type rotary changer. SOLUTION: At the time of opening operation of a base, the rotation driving force is transmitted to a loading gear 12 at first by the self-rotational motion of a small bevel gear in accordance with the driving force from a motor 16, which is transmitted through a drive gear 7, since the rotation of a cam rotating body 4 is interrupted. After that, the rotation of the loading gear 12 is interrupted, and the rotation driving force is transmitted to the cam rotating body 4 by the revolutional motion of the small bevel gear in accordance with the driving force from the motor 16 transmitted through the drive gear 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus such as a compact disc player.

[0002]

2. Description of the Related Art Conventionally, as a reproducing apparatus for an optical disk such as a compact disk (hereinafter simply referred to as a disk), there is a disk reproducing apparatus with a so-called drawer type rotary changer of a base opening / closing type.

As shown in FIG. 10, a disk reproducing device 50 with a drawer type rotary changer is
A turntable 51 for mounting a plurality of disks is provided, and an arbitrary disk is selectively picked up from at least one disk mounted on the turntable 51 and reproduced. In addition, the base 52 is opened and closed in order to exchange a disc or to reproduce a disc.

[0004] Such a disk reproducing apparatus 50 reproduces an arbitrary disk and exchanges the disk.
It has the following configuration.

That is, the disc reproducing apparatus 50 includes a first motor 58 for supplying a driving force for rotating the turntable 51, a worm 57, a worm wheel 56, a cam gear 55, a TT A gear 54 is provided, and a gear 53 is provided on the back surface of the turntable 51.

The driving force of the first motor 58 is
7, transmitted to the turntable 51 via the worm wheel 56, cam gear 55, TT gear 54, and gear 53, so that the turntable 51 rotates.

Further, a disk reproducing section 59 including a pickup is held by a lever 60 which can swing up and down, and the lever 60 is engaged with a cam provided on a side surface of a cam gear 55. When the turntable 51 rotates, the lever 60 moves up and down with rotation of a cam provided on the side surface of the cam gear 55, and at the same time, the disk reproducing unit 59 held by the lever 60 moves up and down. Thus, when the turntable 51 rotates, the disc reproducing unit 5
9 is located below the turntable 51 so as not to hinder the rotation.

The cam gear 55 rotates the disc table 59 in one reciprocating motion by one rotation of the cam gear 55 and rotates the turntable 51 clockwise 360 ° / N via the TT gear 54 (however, N is the maximum number of disks that can be placed on the turntable 51). The cam gear 55 has another cam on its bottom surface, and the cam and the disc reproducing unit up / down detection switch 61 can detect the end of the up / down movement of the disc reproducing unit 59.

Further, the disc reproducing apparatus 50 includes a second motor 67 for supplying a driving force for opening and closing the base 52, a belt 66, a pulley gear 65, a loading gear 64, and a rack gear 63 on the upper surface. And a loading chassis 62 provided.
The loading gear 64 is attached to the base 52.

[0010] The driving force of the second motor 67 is
6, transmitted to the loading gear 64 via the pulley gear 65. The loading gear 64 meshes with the rack gear 63, and when the loading gear 64 rotates, the base 52 coupled to the loading gear 64
Are opened and closed along the rack gear 63.

A disc number detecting member 70 is provided on the back surface of the turntable 51, and a disc number detecting switch 71 for detecting each disc number is attached to the base 52.

In the disk reproducing apparatus 50 configured as described above, to remove desired or all disks placed on the turntable 51 when the apparatus is in the reproduction stop state, a control from a control unit (not shown) The second motor 67 is driven by the signal to open the base 52 to the front, and at the same time, the first motor 58 is also driven by the same control signal to rotate the turntable 51 by a predetermined angle. When the unloading of the base 52 is completed, the turntable 51 is rotated by a predetermined angle from the state inside the housing as shown in FIG. 11B.

[0013]

However, in the above-mentioned conventional configuration, as shown in FIG. 11A, the mounting portion 51c of a desired disk to be taken out was located at the left front position inside the housing. In this case, even at the end of unloading, as shown in FIG. 11B, it is difficult to take out the disc because the disc mounting portion 51c is located inside the housing. Similarly, all three discs are taken out. Even in such a case, there is a problem that it is difficult to take out some disks.

As a method of solving these problems, conventionally, a turntable is rotated by a predetermined angle (360 ° / N (N is the number of disks that can be placed on a disc) for each other operation) by a control signal by another operation. There is a method in which another operation is repeated until the disk comes out of the housing from which the disk can be taken out. However, such a method has a problem that a complicated operation is required for a user.

An object of the present invention is to provide a disk reproducing apparatus which can easily take out a desired disk placed on a turntable without requiring a complicated operation by a user.

[0016]

In order to achieve the above-mentioned object, according to the present invention, a plurality of disks can be mounted on a circle around a rotation center at substantially equal intervals. A table, a tray to which the turntable is attached and reciprocated between a disk mountable position and an inner part of the apparatus, tray driving means for reciprocating the tray, and turntable rotating means for rotating the turntable In the disc reproducing apparatus having the above, when the tray driving means moves the tray to the disc removable position, a part of the disc placed on the turntable remains in the apparatus, and While the movement is stopped, the turntable turning means sets the turntable at a predetermined angle after the movement of the tray to the disk removable position is completed. It is those allowed to transfer.

According to a second aspect of the present invention, the tray driving means and the turntable rotating means switch and use a single driving source to reciprocate the tray and rotate the turntable. It is.

Therefore, according to the first aspect of the present invention, the tray is moved to the removable position by the tray driving means, and the movement is stopped in a state where a part of the disc placed on the turntable remains in the apparatus. After that, the turntable rotating means rotates the turntable by a predetermined angle, so that desired or all disks placed on the turntable can be easily taken out.

According to the second aspect of the present invention, the mechanism can be simplified by switching and driving the tray driving means and the turntable rotating means by a single driving source.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The disk reproducing apparatus according to the present embodiment is a disk reproducing apparatus with a drawer type rotary changer, and here, a case where the number N of disks mounted on the turntable is N = 3 is exemplified. Discs that can be reproduced by the disc reproducing apparatus include CDs (compact discs), LDs (optical video discs), DVDs (digital versatile discs), CDGs (CD graphics), single CDs, and CDVs (CD videos). be able to.

First, the front direction of the disc reproducing apparatus is the A direction, the reverse direction is the B direction, the right hand direction is the E direction, the left hand direction is the F direction, the vertical upward direction is the G direction, and the vertical downward direction is the B direction. The direction is the H direction, the clockwise direction in the H direction is the I direction, the counterclockwise direction is the J direction, the counterclockwise direction in the F direction is the K direction, and the clockwise direction is the L direction.

The structure of the above-mentioned disc reproducing apparatus is mainly shown in FIG.
This will be described with reference to FIG. The disc reproducing apparatus has a loading chassis 20 as an exterior member, and a base 1, a turntable 2, and a loading chassis 20 inside the loading chassis 20.
It includes a disk reproducing unit 3, a mechanical chassis 5, and a motor 16 as a drive system.

The base 1 is a square plate-shaped base for keeping the turntable 2, the disk reproducing unit 3, and the mechanical chassis 5 in an appropriate positional relationship at all times. It is attached to the chassis 20 so as to be slidable in the AB direction. A turntable 2 is rotatably supported on the upper surface of the base 1 via a roller 24 between the base 1 and the base 1 so as to be rotatable in the IJ direction. On the lower surface of the base 1, a disk reproducing unit 3 is mounted so as to be swingable up and down around a support unit 3a, and further, a mechanical chassis 5 is mounted in a state fixed to the base 1. I have.

The turntable 2 is a circular table on which N disks can be mounted, and N concave portions are provided at regular intervals as a disk mounting portion 2a in the circumferential direction around the rotation axis. ing. The disk 22 placed on the turntable 2 is moved to a reproduction position on the disk reproduction unit 3 by the rotation of the turntable 2 and is reproduced. Also, a disc reproducing unit 3 attached below the base 1 is mounted on the disc mounting unit 2a.
Thus, an opening 2b is provided so that information can be read from the lower surface of the loaded disk 22. Similarly, an opening (not shown) is provided in the base 1 at a position corresponding to the disk reproducing unit 3.

The disk reproducing section 3 is for reading information recorded on the disk 22 while rotating the disk 22 placed on the turntable 2, and for rotating and holding the disk 22. An optical pickup 3c for irradiating the disk 22 with laser light and reading recorded information from the reflected light is provided. The disk holder 3b and the optical pickup 3c are mounted on the base 1 except when the turntable 2 is rotated.
And, it protrudes above the turntable 2 from an opening provided in the turntable 2. However, in FIG. 1, the disc reproducing unit 3 is depicted as a plate-like member from which the disc holding unit 3b and the optical pickup 3c are omitted.

The mechanical chassis 5 is a base member for holding a gear or the like for transmitting the driving force of the motor 16 between the base 1 and the mechanical chassis 5.
It has a base 5a and an arm 5b for supporting the base 5a at a fixed distance from the base 1.

The following two operations are required for the disk reproducing apparatus having the above configuration. That is, the opening / closing operation of the base 1 when loading, unloading, or exchanging a disc, and the turn when exchanging and removing the disc remaining inside when selecting a disc to be reproduced or when unloading the base 1 is completed. That is, the rotation operation of the table 2. The disc reproducing apparatus according to the present embodiment performs the above two operations by one drive system, thereby simplifying the apparatus and reducing the cost, and rotating the turntable 2 after the opening and closing operation of the base 1 is completed. Is performed so that a desired or all disks can be easily removed by one operation.

The configuration necessary for performing each of the above two operations using one drive system will be described in further detail. In the following description, it is assumed that the turntable 2, the disk reproducing unit 3, the mechanical chassis 5, and the like are attached to the base 1, and that the unit 1 moves integrally when the base 1 is opened and closed. It is called an assembly.

The motor 16 for providing the driving force for each of the above operations
Are fixed on the base 5 a of the mechanical chassis 5. A worm 17 is attached to the rotation shaft of the motor 16, and the worm 17 meshes with the worm wheel 9 b of the worm wheel 9 in which the pulley 9 a and the worm wheel 9 b are integrated. The pulley 9a of the worm wheel 9 is connected to the pulley 7a of the drive gear 7 in which the pulley 7a and the bevel gear 7b are integrated by a belt 8.

The transmission path of the driving force by the configuration from the motor 16 to the drive gear 7 is the same in both the opening and closing operation of the base 1 and the turning operation of the turntable 2. However, the disk reproducing apparatus according to the present embodiment attempts to open and close the base 1 and rotate the turntable 2 by one drive system as described above. A configuration is required to make the transmission path different for the above two operations. The configuration for that will be described in more detail.

In the disc reproducing apparatus, the driving force transmitted from the motor 16 to the drive gear 7 as the first driving force transmitting member is transmitted to the loading gear 12 as the base opening / closing member when the base 1 is opened and closed. When the turntable 2 rotates, the rotation is transmitted to the cam rotating body 4 as a turntable rotating member. As a configuration for switching the transmission path of the driving force to the loading gear 12 and the cam rotor 4, a small bevel gear 14 as a second driving force transmitting member, a change lever 11 as a rotation preventing member, and a solenoid 15 are provided. Is provided.

First, the structure of the cam rotor 4 will be described with reference to FIG. The cam rotor 4 includes a substantially cylindrical portion (hereinafter, simply referred to as a cylindrical portion) and a substantially disc-shaped portion having a diameter larger than the diameter of the cylinder (hereinafter, simply referred to as a disc portion). Is coaxially integrated. Further, a through hole having a diameter slightly smaller than the outer diameter of the cylindrical portion is formed in the center of the cam rotating body 4. A boss 4b is provided inside the through hole, and a rotating body 4a including the cylindrical portion and the disk portion is provided.
Are connected to the boss 4b by four arms 4f. A gear portion 4c, which is partially missing, is provided around the disk portion.

As shown in FIG. 5, between the rotating body portion 4a of the cam rotating body 4 and the boss 4b, the rotating shaft of the cam rotating body 4 is orthogonal to the arm 4f at the same height. Two small bevel gears 14 are supported so as to have a rotation axis and to be symmetrical with respect to the rotation axis of the cam rotor 4.

From above the through hole of the cam rotor 4,
The drive gear 7 is fitted, and the bevel gear portion 7b of the drive gear 7 is meshed with the small bevel gear 14. Further, a loading gear 12 is fitted into a lower portion of the through hole of the cam rotor 4, and the loading gear 12
The bevel gear portion 12a meshes with the small bevel gear. The gear portion 12b of the loading gear 12 meshes with a rack gear 20a provided in the AB direction on the upper surface of the loading chassis 20. The drive gear 7 and the loading gear 12 each have a shaft hole having a diameter equal to that of the shaft hole of the boss 4 b of the cam rotor 4.

A shaft 1a extending in the GH direction is provided on the lower surface of the base 1, and the drive gear 7, the cam rotating body 4, and the loading gear 12 are maintained by the shaft 1a while maintaining the meshing state. It is rotatably supported in the IJ direction. That is, the drive gear 7
Is engaged with the cam rotor 4 having the pulley portion 7a on the G direction side and the bevel gear portion 7b on the H direction side and the disk portion on the G direction side, and the loading gear 12 is a bevel gear portion 12
The gear is engaged with the cam rotor 4 with a set to the G direction and the gear portion 12b set to the H direction.

At this time, the pulley portion 7a of the drive gear 7
Protrudes from the disc portion of the cam rotor 4 in the G direction, and the gear portion 12b of the loading gear 12 protrudes from the cylindrical portion of the cam rotor 4 in the H direction. Further, the gear portion 12b of the loading gear 12 is
And protrudes in the H direction from the base 5a through an opening provided in the base 5a having an outer diameter substantially equal to that of the gear 12a. The end surface of the loading gear 12 in the H direction is connected to the holding portion 5 provided further below the base 5a.
The drive gear 7, the cam rotor 4, the small bevel gear 14, and the loading gear 12 supported by the supporting member c are supported while maintaining their meshed state.

Further, as shown in FIGS. 6 and 7, the driving force from the drive gear 7 (see FIG. 5) is
And the change lever 11 and the solenoid 15 in order to transmit the change gear 11 or the loading gear 12 (see FIG. 5).
Thus, a configuration is provided to prevent rotation of the member that is not driven. The change lever 11 is substantially "ku"
The first arm 11a and the second arm 1
1b. The change lever 11 is provided on the support shaft 1.
It is attached so as to be rotatable about Ic in the IJ direction. A protrusion 11d is provided at the tip of the first arm 11a, and the protrusion 11d is capable of protruding and retracting in a notch 4g provided in a cylindrical portion of the cam rotor 4. Further, the tip of the second arm 11b has a protrusion 11e.
Is provided, and the protrusion 11e can be protruded and retracted in a groove of the gear portion 12b of the loading gear 12. The rotation of the change lever 11 about the support shaft 11c causes the cam rotator 4 and the loading gear 12 to rotate.
Is prevented from rotating.

Normally, the change lever 11 is
As shown in FIG. 5, the projection 11d of the first arm 11a is fitted into the notch 4g of the cam rotor 4 to prevent the cam rotor 4 from rotating. When the turntable 2 rotates, that is, when the cam rotating body 4 rotates, as shown in FIG. 6, the change lever 11 is sucked by the solenoid 15 and rotated in the J direction, so that the protrusion 11d is formed. Is disengaged from the cutout portion 4g of the cam rotor 4, and the cam rotor 4 becomes rotatable. At this time, the protrusion 11e of the second arm 11b
Fits into the groove of the gear portion 12b of the loading gear 12,
The rotation of the loading gear 12 is prevented.

As described above, when the base 1 is opened and closed,
The rotation of the cam rotor 4 is prevented, and the driving force of the drive gear 7 is transmitted to the loading gear 12 via the small bevel gear 14. The loading gear 12 meshes with a rack gear 20 a provided in the AB direction on the upper surface of the bottom of the loading chassis 20.
2 rotates along with the rack gear 20a by rotating while meshing with the rack gear 20a.
Thereby, the opening and closing operation of the assembly of the base 1 becomes possible.

When the turntable 2 rotates, as described above, the rotation of the change lever 11 in the J direction causes the protrusion 11e to prevent the loading gear 12 from rotating. , Small bevel gear 1
4 to the cam rotor 4. As shown in FIG. 1, a TT gear 6 is meshed with the cam rotating body 4, and a gear 2 c provided on the back surface of the turntable 2 is meshed with the TT gear 6. . With the above configuration, the driving force of the motor 16 is transmitted to the turntable 2, and the turntable 2 can be rotated.

However, during the turning operation of the turntable 2, it is necessary to move the disc reproducing unit 3 to the retracted position so that the disc reproducing unit 3 does not hinder the turning of the turntable 2. The configuration for that will be described in more detail.

First, as shown in FIG. 3, the disc reproducing section 3 is mounted on the back surface of the base 1 so that the end on the F direction side is swingable by a support section 3a. Also,
The shift lever 1 is provided on the upper surface of the base 5a of the mechanical chassis 5.
The end on the E direction side of 0 is hinged about an axis extending in the AB direction. The end of the disc reproducing unit 3 on the E direction side and the end of the shift lever 10 on the F direction are
It is elastically connected by two engaging portions 10b arranged in the AB direction.

As shown in FIG. 4, the cam rotating body 4 has a groove-like vertical cam 4d for raising and lowering the shift lever 10 around the cylindrical portion. Most of the vertical cam 4d is a substantially elliptical first groove having an inclination with respect to the horizontal plane. However, at the upper portion of the vertical cam 4d, a second groove having no inclination with respect to the horizontal plane. It is a groove. The ends of the first and second grooves are connected to each other,
The vertical cam 4d is formed continuously over the entire outer periphery of the cam rotor 4.

As shown in FIG. 3, the vertical cam 4d has
A pin 10a provided on the shift lever 10 is inserted, and the pin 10a moves up and down along the vertical cam 4d as the cam rotor 4 rotates. Thereby, one of the cam rotors 4
The rotation changes the shift lever 10 from the up state to the down state, and further to the up state. At this time, the shift lever 10 and the engaging portion 10
The disc reproducing unit 3 engaged by b also moves up and down at the same time. The provision of the parallel portion on the vertical cam 4d allows the disc reproducing unit 3 to reliably hold the highest reproducing position.

Further, the configuration of a detection system for controlling the above operations will be described.

First, as shown in FIG. 1, in order to control the rotation of the cam rotor 4, a cam 4e is provided on the side surface of the cylindrical portion of the cam rotor 4. Also, the mechanical chassis 5
(Not shown), an ascending position detecting switch 13 is attached, and a part of the cam 4e abuts on the ascending position detecting switch 13 by the rotation of the cam rotor 4 to operate the ascending position detecting switch 13. It is made to let. When the ascending position detecting switch 13 is ON, the ascending position detecting switch 13 detects that the disk reproducing unit 3 is performing the elevating operation, and turns OFF.
In this case, it is detected that the turntable 2 is rotating. The signal of the ascending position detection switch 13 is also used to stop the operation of the motor 16,
Thereby, the rotation of the cam rotor 4 is controlled so as to be able to always make one rotation at a preset reference position.

As shown in FIG. 2, an open / close detection switch 21 for detecting the position of the base 1 is mounted on the mechanical chassis 5 to control the opening and closing operation of the assembly of the base 1. ing. On the other hand, the loading chassis 20 has an open detection member 20 in the direction A.
b is provided, and a close detection member 20c is provided on the B direction side. By moving the assembly of the base 1,
The open / close detecting members 20b and 20c are brought into contact with the open / close detecting switch 21 to determine whether the assembly of the base 1 is in the open state or the closed state.

Finally, a disc number detecting switch 18 is provided on the upper surface of the base 1 to control the turning operation of the turntable 2, while a disc number detecting member 19 is provided on the back surface of the turntable 2. Is provided. The rotation of the turntable 2 causes the disk number detection member 19 to contact the disk number detection switch 18, and the disk number is determined based on the number of times the disk number detection switch 18 is pressed during one rotation of the cam rotor 4. Is detected.

The above is the main configuration of the disk reproducing apparatus according to the present embodiment. Hereinafter, the operation of the above configuration will be described in detail.

First, the motor 1 will be described with reference to FIGS.
A transmission path of the driving force from the drive gear 6 to the drive gear 7 will be described. When placing or removing the disk 22 from or on the disk mounting portion 2 a provided on the turntable 2, first, the assembly of the base 1 is moved in the direction A and the base 1 is opened. For this purpose, first, the motor 16 is rotated in the L direction by an external signal, and the worm wheel 9 meshed with the worm 17 inserted into the rotation shaft of the motor 16 is rotated in the J direction. Then, the drive gear 7 to which the pulley portion 9a of the worm wheel 9 and the pulley portion 7a are connected via the belt 8 starts to rotate in the J direction.

Next, the transmission path of the driving force from the drive gear 7 will be described mainly with reference to FIG. As already described in the description of the configuration, when the base 1 is opened and closed, the rotation of the cam rotor 4 is prevented by the change lever 11 (see FIG. 7). When the drive gear 7 is rotated in this state, since the cam rotor 4 is fixed, the small bevel gear 14 supported by the cam rotor 4 is rotated.
Can only rotate about its rotation axis. Therefore, the driving force of the drive gear 7 is transmitted to the loading gear 12 by the rotation of the small bevel gear 14, and when the drive gear 7 rotates in the J direction, the loading gear 1 is rotated.
2 rotates in the I direction.

The loading gear 12 meshes with a rack gear 20a provided on the loading chassis 20, and when the loading gear 12 rotates in the I direction,
It moves in the direction A along the rack gear 20a. Accordingly, the assembly of the base 1 starts the opening operation.

After that, the open
The close detection switch 21 (see FIG. 2) is connected to an open detection member 20b provided on the loading chassis 20.
(See FIG. 2). When the motor 16 rotates in the K direction, the motor 16 rotates in the K direction in response to a signal from the open / close detection switch 21. 2 starts the rotation operation.

As shown in FIG. 6, when the turntable 2 rotates, the change lever 11, which is pulled in the direction I by a spring (not shown) and prevents the rotation of the cam rotor 4, becomes a solenoid. The change lever 11 is disengaged from the notch of the rotating body 4. Further, the projection 11b at the other end provided on the change lever 11 is fitted between the gears of the loading gear 12 with the rotation of the change lever 11, and prevents the rotation of the loading gear 12.

In this state, when the motor 16 is rotated in the K direction, the rotational force of the motor 16 causes the drive gear 7 to rotate in the I direction, as in the opening and closing operation of the base 1. At this time, since the rotation of the loading gear 12 is prevented by the change lever 11, the small bevel gear 14 receiving the driving force of the drive gear 7
The revolving motion starts in the same I direction as the drive gear 7 on the bevel gear portion 12a. Then, with the revolving motion of the small bevel gear 14, the cam rotor 4 that supports the small bevel gear 14 also rotates in the I direction.

The rotation of the cam rotator 4 rotates the turntable 2 by means of a gear portion 4c provided on the disk portion, and furthermore, the rotation of the turntable 2 by a vertical cam 4d provided on the cylindrical portion. Perform the lifting motion. The above two operations will be described below.

As shown in FIG. 8 (a), at the reference position of the rotation of the cam rotor 4, the vicinity of the center of the missing tooth portion is T · T
It is in contact with gear 6. Further, in this state, FIG.
As shown in (a), the pin 10a of the shift lever 10
Is a state inserted into the uppermost part of the vertical cam 4d of the cam rotating body 4. At this time, the disc reproducing unit 3 (see FIG. 3) engaged with the shift lever 10 is at the highest reproducing position.

Here, as shown in FIG. 8 (b), the cam rotor 4 is rotated in the direction I in a state where the gear portion 4c does not mesh with the TT gear 6. At this time, since the gear portion 4c of the cam rotor 4 is not meshed with the T / T gear 6, the rotational driving force of the cam rotor 4 is not transmitted to the T / T gear 6, and the turntable 2 does not rotate. However, at this time, as shown in FIG.
The 0 pin 10a moves in the H direction along the vertical cam 4d with the rotation of the cam rotating body 4, and the shift lever 10 also rotates in the H direction about the axis hinged to the mechanical chassis 5. I do. Accordingly, the disc reproducing unit 3 engaged with the shift lever 10 also starts to descend in the H direction around the support 3a.

When the cam rotating body 4 is further rotated in the direction I, the gear portion 4c meshes with the TT gear 6 as shown in FIG. Start turning. At this time, as shown in FIG. 9C, the pin 10a of the shift lever 10 has sufficiently moved in the H direction along the vertical cam 4d. Therefore, the disc reproducing unit 3 also includes the disc holding unit 3b and the optical pickup 3
Since c is in a state of being lowered to a retracted position below the bottom surface of the turntable 2, the disc reproducing unit 3 does not hinder the rotation of the turntable 2.

When the cam rotor 4 is further rotated in the direction I, as shown in FIG. 8D, the meshing state between the gear portion 4c and the TT gear 6 is released, and the turntable 2 is turned. The movement stops. However, at this time, FIG.
As shown in (d), the pin 10 of the shift lever 10
a moves in the G direction along the vertical cam 4d with the rotation of the cam rotor 4, and the shift lever 10 is also moved to the mechanical chassis 5d.
About the axis hinged to the G direction. As a result, the disk reproducing unit 3 engaged with the shift lever 10 also starts to move upward in the G direction around the support 3a, and is again moved to the reproducing position shown in FIG. When the disk reproducing unit 3 moves up to the reproduction position, the disk 22 mounted on the disk mounting unit 2a can be loaded into the disk holding unit 3b and brought into a reproducing state.

Here, the rotation angle of the turntable 2 corresponding to one rotation of the cam rotor 4 is 360 ° / 3 = 120.
°, so that only Z / 3 can be rotated with respect to the number of teeth Z of the gear portion 2c provided on the back surface of the turntable 2,
The number of teeth of the TT gear 6 and the number of teeth of the cam rotor 4 are set.

A cam 4e provided on the cam rotor 4
Is set so as to switch ON / OFF of the ascending position detection switch 13 at the reference positions shown in FIGS. 8A and 9A. For this reason, when the cam rotor 4 starts rotating in the direction I, the cam 4e is disengaged from the ascending position detection switch 13 (or comes into contact with the ascending position detection switch 13), and the cam rotator 4 makes one rotation, thereby causing 4e
When it comes into contact with the ascending position detection switch 13 again (or comes off the ascending position detection switch 13), the rotation of the cam rotor 4 is stopped. With this configuration, the cam rotating body 4 is reliably held at the reference position except when the turntable 2 is rotating.

When the rotation of the cam rotor 4 starts,
When the change lever 11 is attracted to the solenoid 15, the protrusion 11 a of the change lever 11 is disengaged from the notch provided in the cam rotor 4, and the cam rotor 4 can rotate. However, the suction time of the solenoid 15 is set to about 1/4 rotation of the cam rotor 4, and thereafter, the protrusion 11a is pressed against the side surface of the cylindrical portion of the cam rotor 4 by a spring. However, at this time, if the cam rotor 4 is not at the reference position, the protrusion 11a does not fit into the notch, so that the rotation of the cam rotor 4 is not prevented. Further, the other protrusion 11b provided on the change lever 11 does not come off the groove of the loading gear 12, and the rotation of the loading gear 12 does not become free.

The projection 11a of the change lever 11
Immediately before the cam 4e provided on the cam rotor 4 comes into contact with the ascending position detection switch 13, the cam 4e is fitted again into the notch provided on the cam rotor 4 to prevent the rotation of the cam rotor 4. Thereafter, the cam 4e comes into contact with the ascending position detection switch 13 (or comes off the ascending position detection switch 13), detects that all the operations during one rotation of the cam rotor 4 are completed, and stops the motor 16. . Note that the turntable 2 rotates ３ by one rotation of the cam rotator 4.

On the other hand, when the base 1 is closed, the rotation direction of the motor 16 is reversed, and the motor 16 is rotated in the K direction. Then, the driving force of the motor 16 is transmitted to the loading gear 12 through the same transmission path as described above, and rotates the loading gear 12 in the J direction. Thereby, the assembly of the base 1 starts the closing operation. Then open
The close detection switch 21 (see FIG. 2) is provided with a close detection member 20c provided on the loading chassis 20.
(See FIG. 2), the closing operation is stopped.

Thereafter, as in the case of the base opening operation, the turntable 2 starts rotating operation in response to the signal of the open / close detection switch 21. At this time, the turntable 2 makes 1/3 turn, and counts the number of times that the disc number detecting member 19 provided on the back surface of the turntable 2 hits the disc number detecting switch 18 during the turntable 1/3 turn. Thus, the disk number of the disk mounting portion 2a on which the currently playable disk 22 is mounted can be detected.

As described above, the disc reproducing apparatus according to the present embodiment can open and close the base 1 and rotate the turntable 2 by one motor 16.
In addition to simplifying the structure of the disk reproducing apparatus, the mechanical unit can be unitized, and the assembly workability can be greatly improved by a built-up system. Is performed, the desired or all disks can be easily taken out by one operation.

[0068]

As described above, according to the first aspect of the present invention, the turntable is rotated by a predetermined angle after the tray is moved to the removable position so that the disc mounted on the turntable can be rotated. Even if a part remains in the housing, there is no need for complicated operation by the user,
Desired or all disks placed on the turntable can be easily taken out.

According to the second aspect of the present invention, the mechanism can be simplified by switching and driving the tray driving means and the turntable rotating means by a single driving source, so that the cost can be reduced. Can be achieved.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a perspective view illustrating a schematic configuration of a main part of a disk reproducing apparatus.

FIG. 2 is a plan view showing a schematic configuration of the disc reproducing apparatus.

FIG. 3 is a cross-sectional view illustrating a schematic configuration of the disc reproducing apparatus.

FIG. 4 is a perspective view showing a structure of a cam rotating body used in the disk reproducing apparatus.

FIG. 5 is a cross-sectional view showing a combined state of a drive gear, a cam rotating body, a small bevel gear, and a loading gear used in the disk reproducing apparatus.

FIG. 6 is a plan view showing an operation state of a change lever when rotation of a cam rotor is stopped in the disc reproducing apparatus.

FIG. 7 is a plan view showing an operation state of a change lever when rotation of a loading gear is prevented in the disc reproducing apparatus.

FIG. 8 is an explanatory diagram showing a turning operation of a turntable in the disc reproducing apparatus.

FIG. 9 is an explanatory diagram showing an elevating operation of a disk reproducing unit in the disk reproducing apparatus.

FIG. 10 is a plan view showing a schematic configuration of a conventional disk reproducing apparatus.

FIG. 11 is a plan view showing a base opening / closing operation and a turntable rotating operation of the conventional disk reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 1 base 2 turntable 3 disk reproducing unit 4 cam rotating body 4a vertical cam 7 drive gear 11 change lever 12 loading gear 14 small bevel gear 15 solenoid 16 motor 20d detent stopper 20e detent stopper

Claims (2)

[Claims] 1. A turntable on which a plurality of disks can be placed at substantially equal intervals on a circumference around a rotation center,
It has a tray on which the turntable is mounted and which reciprocates between a disk loading / unloading position and the inner part of the apparatus, tray driving means for reciprocating the tray, and turntable rotating means for rotating the turntable. In the disc reproducing apparatus, the tray driving unit stops moving the tray when a part of the disc mounted on the turntable remains in the apparatus when the tray is moved to the disc removable position. On the other hand, the turntable rotating means rotates the turntable by a predetermined angle after the movement of the tray to the disk removable position is completed. 2. The apparatus according to claim 1, wherein said tray driving means and said turntable rotating means switch between a single driving source to reciprocate said tray and rotate said turntable. 2. The disk reproducing device according to 1.