JPH10188429A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device capable of reducing the number of components and improving the assembling workability, by simplifying the structure of the disk reproducing device by executing the opening/closing operation of a base and the rotation of a turntable by one driving system. SOLUTION: When a motor 16 is operated, the driving force is transmitted to a drive gear 7. A small bevel gear is engaged with the drive gear 7, and a loading gear 12 is engaged with the small bevel gear. The small bevel gear itself is supported by a cam rotating body 4. When the rotation of the loading gear 12 is interrupted, the rotation driving force is transmitted to the cam rotating body 4 by the revolving motion of the small bevel gear, and when the rotation of the cam rotating body 4 is interrupted, the rotation driving force is transmitted to the loading gear 12 by the revolving motion of the small bevel gear on its axis.

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 connected to the loading gear 64.
Are opened and closed along the rack gear 63.

A base open / close detection switch 68 for detecting the open / close position of the base 52 is attached to the base 52, and contacts the rib members 69 provided on the loading chassis 62 to adjust the open / close position. Is to be detected.

On the back surface of the turntable 51, a disk number detecting member 70 is provided. Also,
A disk number detection switch 71 for detecting each disk number is attached to the base 52.

In the disk reproducing apparatus 50 configured as described above, in order to reproduce a desired disk, the second motor 67 is controlled by a control signal from a control unit (not shown).
, The base 52 is opened toward the user, and the disc is placed on the turntable 51. Further, the second motor 67 is driven in the reverse direction by the control signal from the control unit, and the base 52 is closed.

When the base open / close detection switch 68 attached to the base 52 comes into contact with a rib member 69 provided on the loading chassis 62, the second motor 67 stops, and at the same time, the first motor 58 rotates. The cam gear 55 is rotated one turn clockwise to move a desired disc to a reproducible position on the disc reproducing section 59.

At this time, the disc number position when the turntable 51 stops is determined by the number of the disc number detecting members 70 passing through the disc number detecting switch 71. For example, if the passage of the two disk number detecting members 70 is detected by the disk number detecting switch 71, the disk number becomes "2".
Becomes

[0016]

However, in the above-described conventional configuration, when a desired disc is to be reproduced, a drive system for opening and closing the base 52 and a rotation drive system for the turntable 51 are separately provided. Accordingly, there is a problem that the number of parts increases, the structure becomes complicated, and the assembling work also deteriorates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to simplify the structure of a disk reproducing apparatus by opening and closing a base and rotating a turntable with a single drive system. Another object of the present invention is to provide a disk reproducing apparatus capable of reducing the number of parts and improving the workability of assembly.

[0018]

According to a first aspect of the present invention, there is provided a disk reproducing apparatus which is rotatably provided with N sheets (N is an integer of 2 or more).
And a turntable on which the disc can be placed at substantially equal intervals on a circle around the center of rotation, and a base on which the turntable is mounted and which can be opened and closed to solve the above problems. A driving system (for example, a motor) that supplies a driving force for rotating the turntable and opening and closing the base, and when the driving system operates, always receives the driving force to rotate. A first driving force transmitting member, a turntable rotating member that transmits a rotational driving force to the turntable by rotating itself, and an opening / closing driving force to the base 1 by rotating itself. A base opening / closing member, and a rotation preventing member for preventing rotation of the base opening / closing member when the turntable is rotated, and for preventing rotation of the turntable rotating member when the base is opened / closed. A second driving force transmitting member that is pivotally supported by one of the turntable rotating member and the base opening / closing member and is coupled to both the other member and the first driving force transmitting member. (For example,
The second driving force transmitting member, wherein the rotation preventing member pivotally supports the second driving force transmitting member of the turntable rotating member and the base opening / closing member. When the rotation of the second driving force transmitting member is not blocked, the rotation driving force is transmitted to the member that does not pivotally support the second driving force transmitting member. Transmitting the rotational driving force to the member supporting the second driving force transmitting member when the rotation of the member not supporting the second driving force transmitting member is prevented. It is characterized by.

According to the above configuration, when the driving system operates, the driving force is transmitted to the first driving force transmitting member.
The first driving force transmitting member is provided with, for example, a transmission mechanism such as a bevel gear, and a second driving force transmitting member such as a small bevel gear meshes with the transmission mechanism. Further, the second
For example, a bevel gear portion provided on a base opening / closing member (or a turntable rotating member) meshes with the driving force transmitting member, and the second driving force transmitting member itself turns the turntable rotating member. It is supported by a member (or a base opening / closing member).

In the case where the rotation of the base opening / closing member (or the turntable rotating member) is prevented by the rotation preventing member, the second driving force transmitting member itself revolves, thereby causing the second driving force transmitting member to revolve. The rotational driving force is transmitted to a turntable rotating member (or a base opening / closing member) that supports the driving force transmitting member.

Further, when the rotation of the turntable rotating member (or the base opening / closing member) is prevented by the rotation preventing member, the second driving force transmitting member rotates by itself, whereby the base opening / closing member is rotated. (Or a turntable rotating member).

Thus, in the related art, the turning operation of the turntable and the opening / closing operation of the base are performed using separate driving systems, but the above two operations can be performed using only one driving system. As a result, the structure of the disc reproducing apparatus can be simplified.

According to a second aspect of the present invention, the disk reproducing apparatus is rotatably provided so that N (N is an integer of 2 or more) disks can be placed at substantially equal intervals on a circumference around the center of rotation. Turntable and the above turntable are attached,
A drive system that supplies a driving force for rotating the turntable and for opening and closing the base, in order to solve the above-described problem, and that the drive system operates A first driving force transmitting member that constantly rotates by receiving the driving force, a turntable rotating member that transmits a rotating driving force to the turntable by rotating itself, and the first rotating member itself rotates By doing
A base opening / closing member for transmitting an opening / closing driving force to the base 1, and a shaft supported by one of the turntable rotating member and the base opening / closing member, and the other member and the first driving force transmitting member A first driving force transmission member coupled to both the first and second base members; and a first base stop member for preventing rotation of the base opening / closing member in a direction in which the base is opened when the base is completely opened. A second base stop member that prevents the base opening / closing member from rotating in a direction to close the base when the base is completely closed, and the rotational load of the turntable rotating member is The rotation load of the base opening / closing member is set to be larger than the rotation load of the base opening / closing member. When the rotation is transmitted, the rotation driving force is transmitted to the turntable rotating member, whereas when the rotation of the base opening / closing member is not prevented, the rotation driving force is transmitted to the base opening / closing member. I have.

With the above configuration, when the driving system operates, the driving force is transmitted to the first driving force transmitting member.
The first driving force transmitting member is provided with, for example, a transmission mechanism such as a bevel gear, and a second driving force transmitting member such as a small bevel gear meshes with the transmission mechanism. Further, the second
For example, a bevel gear portion provided on a base opening / closing member (or a turntable rotating member) meshes with the driving force transmitting member, and the second driving force transmitting member itself turns the turntable rotating member. It is supported by a member (or a base opening / closing member).

Since the rotational load of the turntable rotating member is set to be larger than the rotational load of the base opening / closing member, the base opening / closing member is moved by the first base stopping member or the second base stopping member. Except when the rotation is prevented, the second driving force transmission member transmits the rotation driving force to the base opening / closing member. Only when the rotation of the base opening / closing member is prevented by the first base stopping member or the second base stopping member, the second driving force transmitting member applies a rotational driving force to the turntable rotating member. To communicate.

Thus, in the related art, the turning operation of the turntable and the opening / closing operation of the base are performed using separate driving systems, but the above two operations can be performed using only one driving system. it can. Further, as compared with the configuration of the first aspect, since the rotation preventing member is not required, the structure of the disc reproducing apparatus can be further simplified.

According to a third aspect of the present invention, there is provided a disk reproducing apparatus according to the first aspect.
In addition to the above configuration, the base further includes a disk reproducing unit that is provided so as to be able to move up and down with respect to the turntable and reproduces a disk brought to an opposing position. The member has a disk reproducing unit elevating control means for controlling the elevation of the disk reproducing unit. The turntable rotating member rotates the turntable 1 / N times with one rotation of the disk reproducing unit. During the rotation of the turntable, the disc reproducing unit is lowered to a retracted position where the disc reproducing unit does not collide with the turntable being rotated by the lifting / lowering control means. Characterized in that the disc reproducing section is raised to a reproduction position where the disc mounted on the turntable can be reproduced. That.

With the above arrangement, when the turntable rotating member rotates, the disk reproducing unit raises and lowers the rotation of the turntable by the disk reproducing unit lifting control means in addition to the rotation operation of the turntable. The lifting / lowering operation of the disk reproducing unit is performed so as not to be caused.

The above-mentioned disc reproducing unit elevating control means is, for example, a grooved cam provided around the turntable rotating member. When the turntable rotating member rotates, for example, a pin inserted into the cam is used. Makes a vertical movement along the cam, and the disk reproducing unit can be moved up and down in synchronization with the vertical movement of the pin.

Further, with one rotation of the turntable rotating member, the turntable rotates 1 / N, and
While the turntable is rotating, the disc reproducing unit is lowered to the retracted position, and at the end of the turntable rotation, the disc reproducing unit is raised again to the reproducing position.

As a result, since the rotation of the turntable and the elevating operation of the disk reproducing unit are performed by the rotation of one member, it is possible to reliably synchronize these operations. Therefore, accurate operation can be performed, and the number of components can be reduced.

[0032]

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 (laser discs), DVDs (digital video discs), CDGs (CD graphics),
Single CD, CDV (CD video) and the like can be mentioned.

First, the front direction of the disc reproducing apparatus is the A direction, the opposite 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 section 3, and the mechanical chassis 5 always in an appropriate positional relationship. 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. Also,
Similarly, the base 1 is provided with an opening (not shown) 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 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 and closing operation of the base 1 when loading, unloading, or exchanging a disk, and the turning operation of the turntable 2 when selecting a disk to be reproduced. In the disk reproducing apparatus according to the present embodiment, the above two operations are performed by one drive system, thereby simplifying the apparatus and reducing the cost.

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 9b of the worm wheel 9 in which the pulley 9a and the worm wheel 9b 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 and 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 7 b of the drive gear 7 meshes 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 maintain the above-mentioned meshing state by the shaft 1a. While being rotatably supported in the IJ direction. That is, the drive gear 7
Is geared 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. The loading gear 12 is a bevel gear portion 12
a is set in the G direction and the gear portion 12b is set in the H direction.

At this time, the pulley portion 7a of the drive gear 7
Protrudes in the G direction from the disc portion of the cam rotor 4, and the gear portion 12 b of the loading gear 12 protrudes in the H direction from the cylindrical portion of the cam rotor 4. Further, the gear portion 12b of the loading gear 12 protrudes from the base portion 5a in the H direction from an opening provided on the base portion 5a of the mechanical chassis 5 and having an outer diameter substantially equal to that of the gear portion 12a. And the end surface in the H direction of the loading gear 12 is
The drive gear 7, the cam rotating body 4, the small bevel gear 14, and the loading gear 12 are supported by a holding portion 5c provided further below the base portion 5a, while supporting the 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 on the bottom upper surface of the loading chassis 20 in the AB direction.
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 rotation of the loading gear 12, so that the driving force of the drive gear 7 is reduced. , Small bevel gear 1
4 to the cam rotor 4. As shown in FIG. 1, a TT gear 6 meshes with the cam rotating body 4, and a gear 2 c provided on the back surface of the turntable 2 meshes with the TT gear 6. ing. 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 engaged by two engaging portions 10b arranged in the AB direction.

As shown in FIG. 4, the cam rotating body 4 has a groove-shaped 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 a horizontal plane. However, at the uppermost part of the vertical cam 4d, a second groove having no inclination with respect to the horizontal plane is provided. 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 attached to 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 mounting or removing the disk 22 from the disk mounting portion 2a 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 that 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), the opening operation stops. In this state, the disk 22 can be mounted on or taken out of the disk mounting portion 2a provided on the turntable 2.

When closing the base 1, 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 base 1
Starts the closing operation. Thereafter, the open / close detection switch 21 (see FIG. 2) is connected to a close detection member 20c (see FIG. 2) provided on the loading chassis 20.
), The closing operation is stopped.

As shown in FIG. 6, when the turntable 2 rotates, the change lever 11, which has been pulled in the direction I by a spring (not shown) to prevent the rotation of the cam rotor 4, is turned into a solenoid. The change lever 11 rotates in the J direction. At this time, the protrusion 11 a at the tip of the change lever 11 is disengaged from the notch of the cam rotor 4. Also, change lever 11
Is inserted between the gears of the loading gear 12 with the rotation of the change lever 11 to prevent 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. 8A, 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.

Further, when the cam rotating body 4 is rotated in the I direction, the gear portion 4c meshes with the TT gear 6 as shown in FIG. Start to rotate. 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.

Further, when the cam rotor 4 is rotated in the direction I, the gear 4c and the TT gear 6 are disengaged from each other as shown in FIG. The rotation operation 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 rotator 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.

Further, 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. .

Further, by one rotation of the cam rotator 4,
The turntable 2 rotates １ ／, and counts the number of times that the disk number detecting member 19 provided on the back surface of the turntable 2 hits the disk number detecting switch 18 during the ３ rotation of the turntable 2. Thereby, the disk number of the disk mounting portion 2a on which the currently playable disk 22 is mounted can be detected.

By specifying a disk number from the open state of the base 1, the disk 22 of the disk number can be reproduced. At this time, for example, the disk 22 placed on the disk number "2"
Is to be reproduced, the assembly of the base 1 starts the closing operation by an external signal.

Thereafter, when the open / close detection switch 21 comes into contact with the close detection member 20c provided on the loading chassis 20, the closing operation is stopped, and at the same time, the signal of the open / close detection switch 21 is received. Then, the turntable 2 starts rotating.
At this time, the rotation of the turntable 2 detects the disc number in the reproducible state. If the detected disk number is not the desired disk number, or if another disk number is to be selected, the operation of rotating the cam rotor 4 again is repeated.
It is possible to bring the disk 22 of a desired disk number to the reproduction state. This eliminates the disadvantage that only one drive system is used and that a loss occurs in the operation time.

The following can be considered as a modified embodiment.

If the vertical cam 4d, the cam 4e, and the missing tooth portion in the above-described embodiment are provided on the cam rotating body 4 so as to be symmetrical with respect to the respective operation standards, the turn in the above-described series of operations will be described. Rotation of the table 2 in the I direction,
Any of the J directions may be possible. Further, as shown in FIG. 1, the rack gear 20a provided on the loading chassis 20 has first and second positions for preventing the rotation of the loading gear 12 at positions where the assembly of the base 1 is opened and closed, respectively. 2. Rotation stoppers 20d and 20e as base stop members are provided.

At this time, for example, when the disc 22 is to be reproduced from the opened state of the assembly of the base 1, the motor 16 is rotated in the L direction by an external signal, and the loading gear 12 is rotated.
Turns in the J direction, and the assembly of the base 1 starts the closing operation.
Thereafter, when the open / close detection switch 21 comes into contact with the open / close detection member 20b provided on the loading chassis 20, the closing operation is stopped. Here, the loading gear 12 is further rotated. Then, the loading gear 12 comes into contact with the rotation stopper 20e provided on the loading chassis 20 and cannot rotate.

Therefore, when the motor 16 is further rotated, the power is naturally transmitted via the small bevel gear 14.
It is converted into a force for rotating the cam rotor 4. After that,
By repeating the above series of operations, the disk 22 at the desired position is
Can be brought to the position for playing back.

However, in this case, the rotational load of the cam rotor 4 is larger than the rotational load of the loading gear 12,
If the rotation of the loading gear 12 is not blocked by the rotation stoppers 20d and 20e, the entire driving force of the drive gear 7 is transmitted to the loading gear 12.

At this time, the rotation direction of the turntable 2 may be different between the open state and the closed state because there is only one drive system. However, the change lever 11 and the solenoid 15 are unnecessary, and the cost is further increased. Down and simplification of the structure can be achieved.

As described above, the disk reproducing apparatus according to the present embodiment can open and close the base 1 and rotate the turntable 2 by one motor 16.
The structure of the disc reproducing apparatus can be simplified, and the mechanical section can be unitized, and the assembly workability can be greatly improved by a built-up system.

The cam rotator 4 includes means for rotating the turntable 2, means for raising and lowering the disc reproducing unit 3, means for detecting the amount of rotation of the cam rotator 4 itself, and prevents rotation of the cam rotator 4. Since all means and the like are integrated, it is possible to reliably synchronize these operations. Therefore,
Accurate operation of the disk reproducing device can be realized, and the number of components can be reduced.

Further, the change load 11 and the solenoid 15 are omitted by making the rotational load of the cam rotor 4 larger than the rotational load of the loading gear 12 and making each cam shape of the cam rotor 4 symmetrical. , And a simpler structure.

[0090]

According to the first aspect of the present invention, there is provided a disk reproducing apparatus comprising:
As described above, when the drive system operates, the first drive unit always receives the drive force and rotates when the drive system operates. A driving force transmitting member, a turntable rotating member that transmits a rotational driving force to a turntable by rotating itself, and a base opening / closing member that transmits an opening / closing driving force to the base 1 by rotating itself A rotation preventing member for preventing rotation of the base opening and closing member when the turntable is rotated, and preventing rotation of the turntable rotating member when the base is opened and closed; and a rotation preventing member for rotating the turntable and the base opening and closing member. A second driving force transmitting member rotatably supported by one of the members and coupled to both the other member and the first driving force transmitting member. The second driving force transmitting member, wherein the rotation preventing member prevents rotation of a member of the turntable rotating member and the base opening / closing member that axially supports the second driving force transmitting member. In this case, the rotation driving force is transmitted to a member that does not support the second driving force transmission member, while the rotation preventing member supports the second driving force transmission member. When the rotation of the other member is prevented, the rotational driving force is transmitted to the member that supports the second driving force transmitting member.

Therefore, conventionally, the turning operation of the turntable and the opening / closing operation of the base are performed using separate driving systems, but the above two operations can be performed using only one driving system. This makes it possible to simplify the structure of the disc reproducing apparatus.

As described above, the disk reproducing apparatus according to the second aspect of the present invention provides a drive system that supplies a driving force for driving the turntable and opening and closing the base, and a drive system that operates when the drive system operates. Is a first driving force transmitting member that always rotates by receiving the driving force, a turntable rotating member that transmits a rotating driving force to the turntable by rotating itself, and a rotating itself. Accordingly, a base opening / closing member for transmitting the opening / closing driving force to the base 1 and one of the turntable rotating member and the base opening / closing member are pivotally supported, and the other member and the first driving force are supported. A second connected to both of the transmission members
And a first base stop member for preventing the base opening / closing member from rotating in a direction to open the base when the base is completely opened, and the base is completely closed. A second base stop member for preventing the base opening / closing member from rotating in a direction to close the base, wherein the rotation load of the turntable rotating member is greater than the rotation load of the base opening / closing member. The second driving force transmission member is configured to be the turntable rotating member when the first base stop member or the second base stop member prevents the rotation of the base opening / closing member. When the rotation of the base opening / closing member is not blocked, the rotation driving force is transmitted to the base opening / closing member.

Therefore, conventionally, the turning operation of the turntable and the opening / closing operation of the base are performed using separate driving systems, but the above two operations can be performed using only one driving system. it can. Further, as compared with the configuration of the first aspect, since the rotation preventing member is not required, there is an effect that the structure of the disk reproducing apparatus can be simplified.

The disk reproducing apparatus according to the third aspect of the present invention is, as described above, in addition to the configuration of the first or second aspect, provided on the base so as to be movable up and down with respect to the turntable. A disc reproducing unit for reproducing the disc brought to the disc, and the turntable rotating member includes a disc reproducing unit elevating control means for controlling the elevation of the disc reproducing unit; The moving member rotates the turntable 1 / N with one rotation thereof, and the disk reproducing unit raises / lowers control means controls the disk reproducing unit to rotate the disk reproducing unit while the turntable is rotating. Lower the disc to a retracted position where it does not collide with the turntable. It is configured to be raised to the reproducing position capable of reproducing location disk.

Therefore, in addition to the effects of the first and second aspects, the rotation of the turntable and the elevating operation of the disk reproducing unit are performed by the rotation of one member, so that the synchronization of these operations is ensured. Can be taken.
Therefore, it is possible to perform a highly accurate operation, reduce the number of parts, and improve the assembling workability.

[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. is there.

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.

[Explanation of symbols]

 Reference Signs List 1 base 2 turntable 3 disk reproducing unit 4 cam rotating body (turntable rotating member) 4a vertical cam (disk reproducing unit lifting / lowering control means) 7 drive gear (first driving force transmitting member) 11 change lever (rotation preventing member) 12) Loading gear (base opening / closing member) 14 Small bevel gear (second driving force transmission member) 15 Solenoid (rotation prevention member) 16 Motor (drive system) 20d Rotation stop stopper (first base stop member) 20e Rotation stop Stopper (second base stop member)

Claims (3)

[Claims] 1. A turntable which is provided rotatably and is capable of mounting N (N is an integer of 2 or more) disks at substantially equal intervals on a circumference centered on a rotation center, and said turntable. In a disc reproducing apparatus having a table mounted and an openable / closable base, a drive system serving as a drive source of a driving force for rotating the turntable and opening / closing the base, and when the drive system operates, A first driving force transmitting member that constantly rotates by receiving the driving force, a turntable rotating member that transmits a rotating driving force to the turntable by itself rotating, A base opening / closing member for transmitting an opening / closing drive force to the base 1; a rotation of the base opening / closing member is prevented when the turntable is rotated; A rotation blocking member that blocks the rotation of the turntable and the base opening and closing member, and is coupled to both the other member and the first driving force transmitting member. A second driving force transmitting member, wherein the second driving force transmitting member is such that the rotation preventing member is the second driving force transmitting member of the turntable rotating member and the base opening / closing member. In the case where the rotation of the member that supports the second driving force transmission member is prevented, the rotation driving force is transmitted to the member that does not support the second driving force transmission member.
When the rotation preventing member prevents the rotation of the member that does not support the second driving force transmitting member,
A disk drive for transmitting a rotational driving force to a member that supports the driving force transmitting member. 2. A turntable provided so as to be rotatable and capable of mounting N (N is an integer of 2 or more) disks at substantially equal intervals on a circumference centered on the center of rotation. In a disc reproducing apparatus having a table mounted and an openable / closable base, a drive system serving as a drive source of a driving force for rotating the turntable and opening / closing the base, and when the drive system operates, A first driving force transmitting member that constantly rotates by receiving the driving force, a turntable rotating member that transmits a rotating driving force to the turntable by itself rotating, A base opening / closing member for transmitting an opening / closing driving force to the base 1, and a shaft supported by one of the turntable rotating member and the base opening / closing member; A second driving force transmitting member coupled to both the first driving force transmitting member, and preventing the base opening / closing member from rotating in a direction to open the base when the base is completely opened. A first base stop member, and a second base stop member for preventing the base opening / closing member from rotating in a direction to close the base when the base is completely closed, The rotational load of the rotating member is set to be larger than the rotational load of the base opening / closing member, and the second driving force transmitting member is configured such that the first base stop member or the second base stop member is the base open / close member. When the rotation of the base opening / closing member is prevented, the rotation driving force is transmitted to the turntable rotating member. When the rotation of the base opening / closing member is not prevented, the rotation driving force is transmitted to the base opening / closing member. A disk reproducing device characterized by reaching. 3. A disk reproducing unit is provided on the base so as to be able to move up and down with respect to the turntable, and reproduces a disk brought to an opposing position. The disk player has a disk playback unit elevation control means for controlling the elevation of the disk playback unit.
The turntable is rotated by 1 / N, and the disc reproducing unit is moved up and down by the disc reproducing unit elevating control means so that the disc reproducing unit does not collide with the turntable while the disc reproducing unit is turning while the turntable is turning. 3. The disc according to claim 1, wherein the disc reproducing unit is lowered to a position where the disc reproducing unit can be raised to a reproducing position at which the disc placed on the turntable can be reproduced when the turntable is rotated. Playback device.