JPH06333316A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize the disk reproducing device of a changer type in depth by overlapping a disk in a reproducing position with a disk in a housing position. CONSTITUTION:A stocker 3 is positioned in its uppermost position to enable a disk 1 housed in the stocker 3 at its uppermost stage to be positioned to be drawn out. From this position, a carriage 2 at the lowermost stage is drawn out by a carriage moving mechanism 8 to reproduce a disk 1 supported by this carriage 2. The disk 1 placed on this drawn carriage 2 is moved into a reproducing position where the innermost circumference of its recording area is slightly exposed from the outermost circumference of an adjacent disk 1. In this position, a center hole 5 of the drawn disk is overlapped with the adjacent disk 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of disc reproducing apparatuses, and more particularly to a changer type disc reproducing apparatus capable of selectively reproducing a plurality of discs.

[0002]

2. Description of the Related Art Conventionally, in a so-called changer type disc reproducing apparatus capable of accommodating a plurality of discs and selectively reproducing the discs, the disc being reproduced and the contained discs are overlapped. For example, Japanese Patent Application Laid-Open No. Sho 5 is a technology for achieving downsizing of the device in the depth direction.
No. 7,101,679, JP-A No. 62-212964, and the like.

FIG. 8 is a diagram showing this overwrapped state. The position where the disk 1 having the center hole 5 in the center is stored is shown by a dotted line. In order to reproduce the disc 1 from this position, the disc 1 is pulled out by the required moving mechanism, moved to the reproduction position shown by the solid line, and the turntable 2 is moved.
The disk 1 is placed on the disk 0 and the disk 1 is rotated. Here, the distance A for pulling out the disc 1 to the reproduction position is at least the distance obtained by adding the radius of the disc 1 and the radius of the turntable 20.

[0004]

In recent years, there has been an increasing need for miniaturization of equipment, and especially in consideration of mounting a changer type disc reproducing apparatus on the dashboard of a car, standard size standards for car stereos. It is impossible to meet the DIN size, which is generally used as the above, even with the technique of the above-mentioned conventional example due to the limitation of the depth dimension.

[0005]

A carriage for rotatably supporting a disk, a stocker capable of accommodating a plurality of carriages, and a disk in which at least the center of the disk supported by the carriage is accommodated in the stocker. The reproducing means comprises reproducing means for reproducing the disk supported by the carriage at the overlapped reproducing position and driving means for contacting the surface of the disk at the reproducing position and rotating the disk.

The drive means in the present invention comprises a drive roller which abuts on one surface of the disk and a driven roller which abuts on the other surface of the disk.

[0007]

The selected one carriage is pulled out from the stocker, and the disc on this carriage is rotationally driven at the reproducing position to read the information recorded on the disc.

At this reproducing position, the disc is rotationally driven by the drive roller that contacts one surface of the disc.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the device of the present invention will be described below.
FIG. 1 is a plan view showing a state where three plate-shaped carriages 2 on which the disks 1 are mounted are stored in a stocker 3, and FIG. 2 is a front view thereof. The carriage 2 is provided with a rotary shaft 4 that rotatably supports the disc 1. By pressing the rotary shaft 4 into a central hole 5 of the disc 1, the surface of the disc 1 does not contact the carriage 2. The disk 1 is rotatable with respect to the carriage 2. A fan-shaped notch 6 is formed at the front end of the carriage 2.

A stocker 3 shown by a broken line accommodates the carriages 2 so that the disks 1 placed on the carriages 2 are concentric with each other while forming a required space therebetween, and a stocker moving mechanism 7 is used to stack the disks 1 in the stacking direction. 2 is movable in the direction of arrow AB in FIG. The carriage 2 accommodated in the stocker 3 can be accommodated in or drawn out from the stocker 3 by the carriage moving mechanism 8 in the direction of arrow CD in FIG.

The optical pickup 10 having the objective lens 11 is movable in the direction of arrow EF in FIG.
The information recorded on the disk 1 is read by the laser light emitted from the objective lens 11. Also, 12 to 1
Reference numeral 4 denotes a rubber roller for rotating the disk 1, which are arranged along the rotation direction of the disk 1 at an angle of 20 degrees. Here, 13 and 14 are driven rollers that are pressed against the recording surface of the disk 1, and 12 is a drive roller that is rotationally driven by a roller driving mechanism 9 and is pressed against the recording surface of the disk 1. Is. The recording area of the disc 1 is recorded over a radius shown by an arrow G from the innermost circumference shown by the one-dot chain line to the outermost circumference shown by the two-dot chain line.

The operation of the above configuration will be described.
In the positions shown in FIGS. 1 and 2, the stocker 3 is located at the uppermost position, and the disk 1 stored in the lowermost stage of the stocker 3 can be pulled out. From this position, the carriage moving mechanism 8 causes the carriage 2 in the lowermost stage.
The carriage 2 is pulled out from the stocker 3 in order to reproduce the disc 1 supported by the carriage 1. The innermost circumference of the recording area of the disc 1 placed on the pulled carriage 2 is the outer circumference of the adjacent disc 1. Is moved to a slightly exposed playback position. At this position, the center hole 5 of the pulled-out disc 1 overlaps the adjacent disc 1.

3 and 4 are a plan view and a front view showing the reproducing position. The drive roller 12, the driven rollers 13 and 14, and the optical pickup 10 move in the direction of approaching the disk 1 with respect to the disk 1 pulled out from the stocker 3. As a result, the drive roller 12 is rotated by the roller drive mechanism 9 while the disk 1 is sandwiched between the drive roller 12 and the driven rollers 13 and 14, so that the disk 1 is rotationally driven. . The optical pickup 10 is located in the notch 6 of the carriage 2 and irradiates the disc 1 with laser light through the objective lens 11 to read the information recorded on the disc 1.

Here, the driving roller 12 and the driven roller 1
The discs 3 and 14 sandwich the disc 1 so that their positions do not overlap each other in plan view. Therefore, even if the rotary shaft 4 of the carriage 2 supporting the disc 1 has some rattling, the surface wobbling at the reproducing position occurs. The disk 1 can be stably rotated without being generated.

From the reproduction state, when reproducing the disc 1 located at the uppermost stage, the carriage moving mechanism 8 moves the carriage 2 in the direction of arrow C, and the stocker 3 moves.
After being stored inside, the stocker moving mechanism 7 causes the stocker 3
Is moved in the direction of arrow B. Then, the carriage moving mechanism 8 pulls out the carriage 2 located at the uppermost stage of the stocker 3 from the stocker 3, and then the drive roller 1 is moved in the same manner as described above.
2. The driven rollers 13 and 14 and the optical pickup 10 move in the direction of approaching the disk 1.

As a result, the driving roller 12 is rotated by the roller driving mechanism 9 while the disk 1 is sandwiched between the driving roller 12 and the driven rollers 13 and 14, so that the uppermost disk is rotated. 1 is rotationally driven. Further, the information recorded on the disc 1 is read by the optical pickup 10. This state is shown in FIG.

The disk 1 is rotated by the drive roller 12 which is pressed against the outer periphery of the surface of the disk 1 as described above, but a constant lateral pressure is applied to the rotary shaft 4 provided on the carriage 2. Therefore, the disk 1 can be rotated more stably. Therefore, the drive roller 12
As shown in FIG. 6, the rotation axis of is provided parallel to the line BB offset by 1 to 2 degrees with respect to the line AA which is the radial direction from the center of the disk 1. As a result, the rotating disk 1 is always indicated by the arrow H in FIG.
A moving force is generated in the direction, and the disk 1 is rotated without being affected by the play in the radial direction of the rotating shaft 4.

Further, another embodiment for applying the lateral pressure to the rotary shaft 4 shown above will be described with reference to FIG. 7 which is a sectional view of a main part. In FIG. 7, the drive roller 12 is provided parallel to the line BB offset by 1 to 2 degrees with respect to the line AA parallel to the rotation surface of the disk 1. This makes it possible to apply a lateral pressure to the rotating disc 1 as in FIG.

In the above embodiment, the stocker moved up and down in response to the selection of the disk. However, the present invention is not limited to this, and the stocker is fixed and the roller and the optical pickup are fixed. It can take various forms, such as being movable in response to the selection of the disc.

Further, in the above-mentioned embodiment, the driving roller and the driven roller contact the recording surface of the disk and the opposite surface thereof, respectively, but the present invention is not limited to this. Alternatively, the driven roller may contact the recording surface of the disk and the drive roller may contact the opposite surface, and the number of rollers may be set appropriately.

In the above-mentioned embodiment, the drive roller and the driven roller are moved in the direction of being pressed against the disk after the disk is pulled out from the stocker and brought to the reproduction position. The rollers may be arranged such that the distance between them is smaller than the thickness of the disks, so that the disks pulled out from the stocker are forcibly inserted between the rubber rollers.

[0022]

As described above, according to the present invention, the disc at the reproducing position and the disc at the storing position can be overlapped with each other.
Since the flap portion can be extended to the portion including the center of the disc, it is possible to greatly contribute to downsizing of the device.

[0023]

[Brief description of drawings]

FIG. 1 is a plan view showing a state where a disc is stored in a stocker.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view showing a state of reproducing a disc located at the bottom of the stocker.

FIG. 4 is a front view of FIG.

FIG. 5 is a front view showing a state in which the disc located at the top of the stocker is reproduced.

FIG. 6 is a plan view of an embodiment showing the arrangement of drive rollers.

FIG. 7 is a plan view of another embodiment showing the arrangement of drive rollers.

FIG. 8 is a plan view showing a reproduction state in the related art.

[Explanation of symbols]

 1 Disk 2 Carriage 3 Stocker 4 Rotating Shaft 5 Center Hole 7 Stocker Moving Mechanism 8 Carriage Moving Mechanism 9 Roller Drive Mechanism 10 Optical Pickup 12 Drive Roller 13 Driven Roller 14 Driven Roller

Claims (2)

[Claims] 1. A carriage for rotatably supporting a disk, a stocker capable of accommodating a plurality of the carriages, and one selected carriage is pulled out from the stocker, and at least the center of the disk supported by the carriage is the stocker. A reproducing means for reproducing the disk supported by the carriage at a reproducing position which overlaps the disk housed therein, and a driving means for abutting the surface of the disk at the reproducing position to rotationally drive the disk. A disc reproducing apparatus comprising: 2. The drive means comprises a drive roller which abuts on one surface of the disk and a driven roller which abuts on the other surface of the disk.
The disc reproducing apparatus described.