JP2990235B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for a recording disk such as a CD (compact disk), and more particularly, to a disk loading mechanism in the disk reproducing apparatus.

[0002]

2. Description of the Related Art There has been a so-called changer-equipped CD reproducing apparatus as a reproducing apparatus for a compact disk. As shown in FIG. 8, the CD reproducing apparatus 50 with a changer includes a disk holding table 51 on which a plurality of disks are mounted, and a plurality of disks mounted on the disk holding table 51 and loaded into the apparatus. , One C
D is selectively picked up and reproduced.

In such a CD reproducing apparatus, a CD
In order to simplify the exchange of CDs, a CD in a non-reproduction state can be exchanged even during reproduction, and the following configuration is provided for that purpose. That is, the CD reproducing device 50
A rack gear 54 is provided along the transport direction on the back surface of a transport plate 53 rotatably supporting the disk holding table 51, and the transport plate 53 is provided via the rack gear 54.
Is provided between the gear rotating body 55 and the rack gear 54, and a forward rotating gear section 56 composed of a pair of gear bodies and a reverse rotating gear section 5 composed of a single gear are provided.
7, a gear 58 for the forward rotation gear portion and a gear 59 for the reverse rotation gear portion are formed on the peripheral surface of the gear rotating body 55 with different diameters and different formation positions.

In the outermost peripheral portion of the rotating gear body 55,
While the CD elevating gear 60 is partially formed, an intermediate drum body 61 is provided on the back side in the loading direction. Then, on the peripheral surface of the intermediate drum body 61, a passive gear 62 meshing with the CD elevating gear 60 and a spiral groove 63 are formed. Further, a fixing spring 64 is provided in the vicinity of the intermediate drum body 61 so as to engage with the peripheral surface of the intermediate drum body 61 to prevent rotation of the intermediate drum body 61 and fix it.

[0005] A disk receiving member 65 whose one end is pivotally supported is provided on the back side in the loading direction of the gear rotating body 55, and an engaging pin 66 provided at the other end of the disk receiving member 65 is inserted into the spiral groove 63. Is engaged.

[0006] A CD with a changer constructed as described above.
The playback device 50 operates as follows. That is, when the gear rotating body 55 is driven counterclockwise in the drawing, first, the normal rotation gear portion gear 58 and the normal rotation gear portion 56 mesh with each other, and the transport plate 53 is moved toward the loading position in the drawing. Move left.
When the transport plate 53 reaches the loading position, the engagement between the forward rotation gear portion 56 and the forward rotation gear portion gear 58 is released, and this time, the CD raising / lowering gear 60 and the passive gear 62 are engaged, and the intermediate drum body 6 is engaged.
1 rotates clockwise. When the intermediate drum body 61 rotates clockwise, the engaging pin 66 moves along the spiral groove 63, and the turntable 67 at the other end of the disk receiving member 65 rises and is located at the deepest position in the loading direction. Lift the CD to the playback position. The fixing spring 64 fixes the disc receiving member 65 in the lifted state.
In this state, the CD at the reproduction position is reproduced.

[0007] When the CD is to be ejected after the reproduction is interrupted,
Conversely, by driving the gear rotating body 55 clockwise, the reverse operation is performed, and the disk receiving member 65 is lowered to take out the transport plate 53 out of the apparatus.

On the other hand, the operation of replacing another CD during the reproduction of a CD is performed by further driving the rotating gear 55 counterclockwise during the reproduction of the CD. Then, the reverse gear portion gear 59 and the reverse gear portion 57 mesh with each other to form the reverse gear portion 5.
7 is rotated clockwise, the transport plate 53 moves rightward in the figure and is taken out of the apparatus. At this time, the CD being reproduced is still held by the disk receiver 65, and the reproduction is continued.

[0009]

By the way, in the conventional CD reproducing apparatus constructed as described above, in order to transmit the rotation drive of the gear rotating body 55 to the transport plate, a normal rotation gear section and a reverse rotation gear section are used. A plurality of gears are required, which increases the number of parts and complicates the structure .

Accordingly, in the present invention, it is an object to provide a disk reproducing apparatus that can simplify the structure.

[0011]

To achieve SUMMARY OF THE INVENTION The above object, CD reproducing apparatus of the present invention comprises a carrier plate which disk is mounted, the loading position and the disc removal position the transfer plate a loading mechanism for reciprocating the transport over between the loading position
To raise and lower the disk on the transport plate
A disk reproducing apparatus having a lifting mechanism
The loading mechanism is a gear rotating body having a drive gear on a part of the peripheral surface.
And a gear rotating body along the transport direction on the transport plate.
Are arranged facing each other at a position where they mesh with the drive gear
And first and second rack gear bodies,
It has features. In addition, the above-mentioned disk lifting mechanism,
An engagement projection erected on an outer edge of the gear rotating body;
An intermediate rotating cylindrical body axially arranged in parallel with the rotating body;
It is arranged on the peripheral surface of the dynamic cylindrical body and at a position where it engages with the engagement protrusion.
The first engaging portion provided on the peripheral surface of the intermediate rotating cylindrical body, and
A second engagement spirally disposed at a position opposite to the engagement portion
Part and a disk receiving member engaged with the second engagement part.
It is preferred to configure.

[0012]

[0013]

According to the structure of the present invention , when the gear rotating body rotates, the driving gear portion provided on a part of the peripheral surface meshes with one of the rack gear bodies to transport the transport plate in one direction. Will do.

When the gear rotating body further rotates in the same direction,
After the drive gear portion is disengaged from one rack gear body, it further meshes with the other rack gear body. Then, the transport plate is transported in the opposite direction to that described above. It should be noted that a configuration as in claim 2 is further provided.
The disk can be moved up and down using the driving force of the loading mechanism.
The disk lifting mechanism
The number of parts can be reduced.

[0015]

[0016]

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a rear view of one embodiment of the present invention, and FIG.
3 is a cross-sectional view, FIG. 3 is a perspective view, and FIGS. 4 to 7 are a rear view and a cross-sectional view showing a state during the operation.

The CD reproducing apparatus 1 is a CD reproducing apparatus with a changer and has a disk holding table 2 on which a plurality of disks are mounted, as in the conventional example. The disc holding table 2 has a disk shape, and a total of three CDs 1
00 can be placed along the circumferential direction. A cutout 4 for inserting a turntable is formed at each position where the CD 100 is placed. The disk holding table 2 thus configured is rotatably supported on the transport plate 3, and is rotated as necessary by a rotation mechanism (not shown).

This CD reproducing apparatus has a loading mechanism and a disk elevating mechanism. The loading mechanism includes a gear rotating body 5
And a passive gear unit 6. The passive gear unit 6
First and second rack gear bodies 7 provided on the back surface of the transport plate 3 along the loading direction of the transport plate 3 (the left-right direction in the figure).
A, 7B. These rack gear bodies 7A, 7
B are arranged on both sides of the transport plate 3 so as to face each other.
The gear rotating body 5 is disposed near the rear surface of the transport plate 3 in parallel with the transport plate 3, and is further disposed such that its axial position is located at an intermediate position between the rack gear bodies 7A and 7B. A flange 8 is formed on a part of the peripheral surface of the gear rotating body 5, and a driving gear 9 is formed on an edge of the flange 8.
Are formed. The drive gear unit 9 is a rack gear body 7
A and 7B are arranged at positions where they mesh with each other. An engagement pin 10 is provided at the center in the width direction of the flange portion 8 to protrude downward. Further, the engagement pin 10
An escape notch 11 is formed on the peripheral surface of the gear rotating body 5 at the formation position.

The disk lifting / lowering mechanism is the gear rotating body 5 described above.
Further, the intermediate rotating cylinder 12 and the disc receiving member 1
3 is added. The intermediate rotating cylindrical body 12 is provided on the rear side of the gear rotating body 5 in the loading direction of the transport plate. The intermediate rotating cylindrical body 12 is axially arranged along the vertical direction similarly to the gear rotating body 5, and is further arranged close to the gear rotating body 5 so that the peripheral surface intersects with the peripheral surface of the gear rotating body 5. Have been. The intermediate rotary cylinder 12 is provided with an engagement groove 14, fixing notches 15A and 15B, and a spiral engagement groove 16. The engagement groove 14 is formed along the radial direction of the intermediate rotary cylinder 12. The fixing notches 15A and 15B are provided at both ends of the engagement groove 14, respectively, and the inner peripheral surface 17 has a size such that the inner peripheral surface 17 substantially abuts along the peripheral surface of the gear rotating body 5. The spiral engagement groove 16 is provided on the peripheral surface of the intermediate rotation cylindrical body 12 so as to face the engagement groove 14. Real truth
In the embodiment, the first engaging portion is constituted by the engaging groove 14 and is formed by a spiral.
A second engagement portion is formed by the engagement groove 16.

The disk receiving member 13 is an intermediate rotating cylinder 1
2 is horizontally disposed on the back side in the loading direction of the transfer plate, and a turntable 18 is provided upright on this. Although not shown in the disk receiving member 13,
A drive mechanism for the turntable 18 and a reading mechanism such as an optical pickup are provided. Disc receiving member 13
A support shaft 19 is disposed horizontally at the end on the back side in the loading direction of the transfer plate. The support shaft 19 is rotatably supported by an internal structure (not shown) of the CD reproducing device 1. An engagement pin 20 is provided at the front end of the disc receiving member 13 in the conveyance plate conveyance direction to protrude toward the front side in the conveyance plate loading direction. It is engaged with the spiral engagement groove 16.

A CD loading operation and a CD reproducing operation by the CD reproducing apparatus 1 will be described. Each operation of the CD reproducing apparatus includes the following.

Non-loading position (non-reproduction state) → loading position (non-reproduction state) This is an operation of first loading the CD 100 into the apparatus.

Loading position (non-reproducing state) → loading position (reproducing state) This is an operation for reproducing the loaded CD 100.

Load position (reproduction state) → load position (non-reproduction state) This is an operation for stopping reproduction of the reproduction CD 100.

Loading position (non-reproduction state) → non-loading position (non-reproduction state)
This is the operation of exchanging 0.

Loading position (reproducing state) → non-loading position (reproducing state) This is an operation for exchanging the non-reproducing CD 100 in the reproducing state.

Non-loading position (playback state) → loading position (playback state)
This is the operation of loading 00.

Next, each of the above operations will be described.

[0030]Non-loading position (non-playback state) → loading position
(Non-playback state) In the non-loading position (non-reproduction state), the state shown in FIGS.
Is in a state. That is, the carrier 3 is pulled out of the apparatus.
Has been started. The intermediate rotating cylinder 12 is fixed for cutting.
The notch 15A is brought into contact with the peripheral surface of the gear rotating body 5, and
In this state, the engagement pin 20 is at the lowermost position of the spiral engagement groove 16.
The disk receiving member 13 is engaged with the clock of FIG.
To rotate the turntable 18 in the non-reproduction state,
That is, it is lowered to the lowermost position. And this
In this state, the gear rotating body 5 is driven counterclockwise. Then
First, the drive gear portion 9 and the first rack gear body 7A mesh with each other.
Slide the transport plate 3 toward the loading position to the left in the figure.
As a result, the state shown in FIG. 4 is finally obtained. this
Thus, while the transport plate 3 is loaded, the gear
With the fixing notch 15A in contact with the peripheral surface of the moving body 5,
Therefore, the intermediate rotating cylinder 12 is fixed so as not to rotate.
Therefore, the disc receiving member 13 is shown in FIG.
Non-reproduction state, that is, the turntable 18 is at the lower end position.
It is fixed while holding it in place.

Loading position (non-reproduction state) → loading position
After loading the CD 100, the disc holding table 2 is turned by a turning mechanism (not shown ) , and the turntable 1 is turned on.
8 located above CD8, that is, the reproduced CD10
Select 0. After selecting the reproduction CD 100, the gear rotating body 5 is driven counterclockwise as shown in FIG. Then, the engagement pin 10 of the gear rotating body 5 is moved to the intermediate rotating cylindrical body 1.
The intermediate rotating cylindrical body 12 is driven by the gear rotating body 5 to rotate clockwise in FIG. During rotation, the intermediate rotation cylinder 12 passes through the evacuation notch 11, so that the rotation of the intermediate rotation cylinder 12 is not hindered by the peripheral surface of the gear rotation body 5. Then, the engagement pin 10 is separated from the engagement groove 14, and the gear notch 15 </ b> B is brought into contact with the peripheral surface of the gear rotating body 5 so that the intermediate rotating cylindrical body 12 is fixed unrotatably. The moving body 5 is driven. Then, the engagement position between the spiral engagement groove 16 and the engagement pin 20 also moves to the uppermost end position of the spiral engagement groove 16, and the disk receiving member 13
Pivots counterclockwise in FIG. 6 to lift the turntable 18. The lifted turntable 18 has a notch 4
, The CD 100 is held, and the CD 100 is further raised to the reproduction position. In this state, the turntable 18 is driven to rotate, and the optical pickup (not shown) is operated to reproduce the CD 100.

Loading position (reproduction state) → loading position (non-replay
(Raw state) In order to stop the reproduction of the CD 100 during reproduction, the rotation drive of the turntable 18 and the operation of the optical pickup are stopped, and conversely, the gear rotating body 5 at the loading position (reproduction state) is turned off. Drive clockwise. Then, the engaging pin 10 of the gear rotating body 5 enters and engages with the engaging groove 16 of the intermediate rotating cylindrical body 12, whereby the intermediate rotating cylindrical body 12 drives the gear rotating body 5. 4 and 5, it rotates counterclockwise. During rotation, the intermediate rotation cylinder 12 passes through the evacuation notch 11,
Is not disturbed by the peripheral surface of the gear rotating body 5.
Then, while the engaging pin 10 is separated from the engaging groove 14, the fixing notch 15A abuts on the peripheral surface of the gear rotating body 5, and the intermediate rotating cylindrical body 12 is fixed so that it cannot rotate. The moving body 5 is driven. Then, the spiral engagement groove 16
The engagement position between the screw and the engagement pin 20 also moves to the lowermost position of the spiral engagement groove 16, and the disc receiving member 13 is moved to the position shown in FIG.
6, the turntable 18 is pulled down by turning clockwise. The turntable 18 that has been pulled down is a reproduction CD 10
Since 0 is lowered to the non-reproduction position (on the disk holding table 2), reproduction of the CD 100 is completely stopped.

[0033]Loading position (non-playback state) → non-loading position
(Non-playback state) In the non-reproduction state, the transport plate 3 at the loading position (see FIG. 4) is removed.
To replace the CD 100 by ejecting it,
And drive it clockwise. Then, the drive gear unit 9 and the first
The gear plate 7A meshes with the rack gear body 7A to move the transport plate 3 to the unloaded position.
To the right, in the figure, toward the CD removal position.
Since the slide is conveyed, the state shown in Figs.
Be in a state. In this way, when the transport plate 3 is transported,
However, the fixing notch 15A abuts on the peripheral surface of the gear rotating body 5.
So that the intermediate rotating cylinder 12 cannot rotate.
The disk receiving member 13 is fixed.
The non-reproduction state shown in FIG.
8 is fixed while being held at the lower end position.

Loading position (reproduction state) → non-loading position (re
(Raw state) To exchange the non-reproduced CD 100 in the reproducing state, the gear rotating body 5 is further driven counterclockwise from the state shown in FIGS. Then, the driving gear unit 9 of the gear rotating body 5 becomes the second
The transport plate 3 is slid and transported rightward in the figure toward the non-loading position, that is, the CD take-out position while meshing with the rack gear body 7B, and finally reaches the state shown in FIG. In this way, while the transport plate 3 is transported, the fixing notch 15B remains in contact with the peripheral surface of the gear rotating body 5, so that
The intermediate rotation cylinder 12 is fixed so as not to rotate, and therefore, the disc receiving member 13 is in the reproduction state, that is,
It is fixed at the upper end position. Thus, if the transport plate 3 is taken out to the non-loading position, the non-reproduced CD 100 can be replaced even in the CD reproducing state.

Non-loading position (reproduction state) → loading position
(Raw state) To load the non-reproduced CD 100 replaced in the reproducing state into the apparatus, the gear rotating body 5 is driven clockwise from the state of FIG. Then, the drive gear portion 9 of the gear rotating body 5 meshes with the second rack gear body to slide and convey the transport plate 3 toward the loading position, that is, the CD loading position, to the left in the figure. The state shown in is shown. In this way, while the transport plate 3 is transported,
Since the fixing notch 15B remains in contact with the peripheral surface of the gear rotating body 5, the intermediate rotating cylindrical body 12 is fixed so as not to rotate, and therefore, the disc receiving member 13 is in the reproducing state, that is, , And is fixed at the upper end position while holding the turntable 18.

[0036]

As it is evident from the foregoing description, according to the configuration of the present invention,
Since the carrying plate loading operation can be performed with a simple structure of a gear rotating body and a pair of rack gear bodies, simplification of the mechanism and reduction of the number of parts can be achieved. Furthermore, the disk
If the lifting mechanism is configured as in claim 2, the disk lifting mechanism
Regarding the structure of the mechanism, simplification of the mechanism, reduction of the number of parts and
Can be achieved.

[0037]

[Brief description of the drawings]

FIG. 1 is a rear view showing the configuration of a CD reproducing apparatus according to one embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a perspective view of the embodiment.

FIG. 4 is a rear view showing a state during the loading operation of the embodiment.

FIG. 5 is a rear view showing an intermediate state of a loaded state of the embodiment.

FIG. 6 is a sectional view of the loaded state of FIG. 5;

FIG. 7 is a rear view showing an intermediate state of a loading state of the embodiment.

FIG. 8 is a rear view of a conventional CD reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Conveyance plate 4 Notch 5 Gear rotating body 6 Passive gear part 7A, 7B Rack gear body 9 Drive gear part 10 Engagement pin 11 Escape notch part 12 Intermediate rotation cylindrical body 13 Disk receiving member 14 Engagement groove 15A, 15B For fixing Notch 16 Spiral engagement groove 100 CD

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kenji Tanaka 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 17/04

Claims (2)

(57) [Claims] A transfer plate 1. A disk is placed, a loading mechanism for forward <br/> backward transport over the transfer plate between the loading position and the disc removal position, is conveyed to the loading position Transfer plate
And a disk lifting mechanism for raising and lowering the upper disk
In the disc reproducing apparatus, the loading mechanism includes a gear rotating body having a drive gear on a part of a peripheral surface thereof, and the gear rotating body interposed between the transport plate along the transport direction.
At the position where they mesh with the drive gear
Disk reproducing apparatus characterized by comprising a first and second rack gear body. 2. The disk lifting mechanism according to claim 1, wherein said disk lifting mechanism comprises an engaging projection provided on an outer edge of said gear rotating body, an intermediate rotating cylindrical body axially disposed in parallel with said gear rotating body, and an intermediate rotating cylindrical body. Engage with the engaging projection on the peripheral surface
A first engaging portion disposed at a position, which is opposite to the engaging portion on the peripheral surface of the intermediate rotating cylindrical body;
2. The disk device according to claim 1 , further comprising: a second engaging portion spirally disposed at a position; and a disk receiving member engaged with the second engaging portion .