JPH05290481A - Disk holder for optical information recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable recording and reproducing on disks of different specifications with one set of the disk holder. CONSTITUTION:A turn table 40 mounted on a spindle 30 is formed of a magnetic material and a magnet 31 and a disk aligning adapter 25 are installed within this turn table. As a result, the disks of the different specifications can be held by one set of the disk holder and, therefore, the size and cost of the device are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc holding device of an optical information recording / reproducing apparatus for recording or reproducing information by irradiating an information recording medium with a light beam.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing a structure of a CD (compact disk), FIG. 8 is a perspective view showing a structure of an optical disk, FIG. 9 is a sectional view of a center side of the optical disk shown in FIG.
0 is a product schematic diagram showing a conventional optical information recording / reproducing apparatus,
11 is a schematic view showing the structure of the disk holding device portion, FIG. 12 is a sectional view of the center side showing the structure of the first disk holding device part shown in part A of FIG. 11, and FIG.
It is a central side sectional view showing the composition of the 2nd disk holding device shown in a section.

In FIG. 7, reference numeral 1 denotes a CD disk body,
Reference numeral 2 is a central hole for positioning. 8 and 9,
Reference numeral 3 is a disk body of the optical disk, 4 is a hub provided in the central portion, 5 is a magnetic attraction yoke, and 6 is a central hole for positioning. In FIG. 10, 7 is a CD cartridge for housing the disk body 1, 8 is an optical disk cartridge for housing the optical disk body 2, 9 is a slot A for mounting the CD cartridge, and 10 is an optical disk cartridge 8. Slots B and 11 are the main body of the optical information reproducing apparatus.

In FIG. 11, 12 is a turntable A on which the disc body 1 is mounted, 13 is a drive motor for the turntable A 12, and 14 is the disc body 1.
The optical heads A, 15a, 15b for controlling recording / reproducing to and from the rails for linearly sliding the optical head A14 in the direction of arrow XX, 16 are holes formed in the base 22, 17 is the disc body 3 Turntable B for recording / playback to and from
Reference numeral 8 is a drive motor for the turntable B17, 19 is an optical head B for controlling recording / reproducing on the disk body 3, and 20
Reference numerals a and 20b denote rail rods for linearly moving the optical head B19 in the direction of arrow XX, and reference numeral 21 denotes a hole provided in the base 22.

In FIG. 12, the drive motor 13 is provided with a spindle 23, and a turntable A12 is provided.
Is installed so that its center hole 12a allows the spindle 23 to pass therethrough. Reference numeral 12b is an engaging hole provided on the turntable A12, and 24 is a magnetic yoke fixed to the turntable A12. A centering adapter 25 is provided at the center of the upper surface of the turntable A12, and the centering adapter 25 is slid in the Y-Y direction in the drawing along the spindle 23 by inserting the center hole 25a into the spindle 23. It is movably attached and enters. Reference numeral 25b denotes a plurality of engaging pieces provided at the lower end of the centering adapter 25, which penetrates through an engaging hole 12b provided in the turntable A12. 26
Is a coil spring installed in a portion where the turntable A12 and the centering adapter 25 are opposed to each other, and always biases the two 12, 25 so as to separate from each other.

Further, a taper portion 25c is provided on the outer peripheral surface of the upper portion of the centering adapter 25, and is formed in a conical shape whose outer diameter increases downward in the drawing. That is, by positioning the disc body 1 so that the center hole 2 of the disc body 1 is engaged with the tapered portion 25c which is the outer peripheral surface thereof, the center of rotation of the disc body 1 is accurately positioned. Reference numeral 27 denotes a stabilizer for holding the disc body 1 placed on the turntable A12, and the center hole 27a is inserted into the spindle 23 for positioning. 28 and 29 are stabilizers 27 and turntable A
12 is a magnetic magnet and a yoke to be attracted onto the surface. Generally, the stabilizer 27, the magnet 28, and the yoke 29 are built in the CD cartridge 7 shown in FIG.

In FIG. 13, the drive motor 18 is provided with a spindle 30 and a turntable B17.
Is installed so that its center hole 17a allows the spindle 30 to pass therethrough. Reference numeral 31 is a magnetic magnet fixed on the turntable B17. In the disk body 3, the center hole 6 provided on the hub 4 is inserted into the spindle 30, and the yoke 5 is attracted to the magnetic magnet 31 on the turntable B17. As a result, it is accurately positioned on the turntable B17.

Next, the operation will be described. When the CD cartridge 7 accommodating the disc body 1 is mounted in the slot A9 of the optical information recording / reproducing apparatus body 11 and the optical disc cartridge 8 accommodating the disc body 3 is mounted in the slot B10, the disc body is subjected to a known disc loading operation. 1 has a center hole 2 guided by a centering adapter 25 and is mounted on a turntable A12, and a stabilizer 27 is held on the upper part thereof by a magnetic attraction force between a magnetic magnet 28 and a yoke 29 and a yoke 24. Further, the disk body 3 is held on the turntable B17 by inserting the center hole 6 on the hub 4 into the spindle 30 and magnetically attracting the yoke 5 by the magnetic magnet 31. As the spindle 22 of the drive motor 13 rotates, the disk body 1 rotates along with the turntable A.
12. Both the surface stabilizer 12 and the stabilizer 27 rotate without eccentricity, and optical information is optically recorded / reproduced by the optical head A14. The rail rods 15a and 15b control the linear sliding movement of the optical head A14. Similarly, the disc body 3 is a turntable B.
The optical head B19 optically records / reproduces information by rotating with 17 together.

[0009]

Since the conventional disc holding device is constructed as described above, a plurality of discs having different specifications such as CDs and optical discs can be recorded / reproduced by one optical information recording / reproducing device. In the case of performing the above method, a plurality of turntables, drive sources, optical heads, etc. are required for each disc specification, and the number of parts is increased, resulting in high cost.

The present invention has been made in order to solve the above problems, and a disk holding device of an optical information recording / reproducing apparatus capable of realizing recording / reproducing of disks having different specifications with a small number of parts and at low cost. The purpose is to get.

[0011]

DISCLOSURE OF THE INVENTION A disk holding device of an optical information recording / reproducing apparatus according to the present invention includes a turntable which is made of a magnetic material and which is fixed around a spindle as a rotation center, and fixed to the turntable. A magnetic magnet, and a disk centering adapter that is installed inside the turntable and is inserted and supported so as to be slidable in the axial direction with respect to the spindle.

[0012]

According to the disk holding device of the present invention,
For a disc body having specifications such as an optical disc having a hub and a magnetic yoke in the central portion, the spindle body and a magnetic magnet provided in the turntable allow the disc body to be accurately held on the turntable. On the other hand, for a disc body such as a CD having a circular hole in the center, the disc body is accurately placed on the turntable by a magnetic magnet and a disc aligning adapter provided in a turntable made of a magnetic material. Retained.

[0013]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a central side sectional view showing an embodiment of a disk holding device of the present invention, and FIGS. 3 and 4 are central views showing a state in which disks of different specifications are mounted on the disk holding device of the present invention. It is a side sectional view. 1-2 in the figure
Reference numeral 9 indicates the same or corresponding portion as that of the conventional device shown in FIGS. 1 to 4, 40 is a turntable made of a magnetic material, 40a is a central hole of the turntable 40 through which the spindle 30 is inserted, and 40b is an engaging piece of an aligning adapter 25 also provided on the turntable 40. Engagement hole 25b is locked, 40c is turntable 4
0 is the disk mounting surface.

Next, the operation will be described. In FIG. 3, when the disc body 1 having the circular hole 2 in the center is mounted, the disc body 1 is placed on the turntable 40 with the center hole 2 guided by the centering adapter 25, and the stabilizer 27 is placed on the top thereof. Magnetic magnet 28, yoke 2
9 and the disk mounting surface 40c of the turntable 40, which is made of a magnetic material, are held by the magnetic attraction force without surface wobbling. Since the center hole 2 of the disc body 1 is positioned by the taper portion 25c of the centering adapter 25, the disc body 1 is held without being eccentric.

In FIG. 4, a hub 4 having a circular convex shape at the center
And a disk body 3 having a magnetic yoke 5 and a central hole 6
When installing the, the center hole 6 on the hub 4
And the yoke 5 is magnetically attracted by the magnetic magnet 31 fixed inside the turntable 40, so that the yoke 5 is held on the disk mounting surface 40c of the turntable 40. At this time, the centering adapter 25 has its upper end abutting on the lower end of the hub 4, and the magnetic magnet 31 fixed inside the yoke 5 on the hub 4 and the turntable 40.
Since the magnetic attraction force of and is set to be larger than the elastic force of the coil spring 26, the lower end portion of the hub 4 pushes the centering adapter 25 upward in the drawing. As a result, the disk body 3 is held on the turntable 40 without any surface wobbling or eccentricity.

Example 2. In the above embodiment, the turntable 40 is made of a magnetic material, and the magnetic magnet 31 is fixed inside the turntable 40 made of this magnetic material. However, as shown in FIG.
It may be integrally formed by a magnetic magnet.
In the case of adopting this configuration, when the disc body 1 having the circular hole 2 in the central portion as shown in FIG. 6 is held on the turntable 40, if the stabilizer 27 holding the disc body 1 is made of a magnetic material, The components of the magnetic magnet 28 and the yoke 29 on the stapler 27 used in the first embodiment can be omitted.

[0017]

As described above, according to the disc holding device of the optical information recording / reproducing apparatus of the present invention, a set of a plurality of discs having different specifications is provided as a turntable, a centering adapter,
Information can be recorded / reproduced by the drive source and the optical head, and the number of constituent parts can be reduced, so that the apparatus can be downsized and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a disk holding device of the present invention.

FIG. 2 is a central sectional view showing an embodiment of the present invention.

FIG. 3 is a central cross-sectional view showing a disc mounted state in one embodiment of the present invention.

FIG. 4 is a central side sectional view showing a disc mounting state of another specification according to an embodiment of the present invention.

FIG. 5 is a perspective view illustrating another embodiment of the present invention.

FIG. 6 is a center side sectional view showing a disk mounted state in another embodiment of the present invention.

FIG. 7 is a perspective view showing the configuration of a disk body having a circular hole in the center.

FIG. 8 is a perspective view showing the configuration of a disc body of another specification.

9 is a sectional view of the center side of FIG.

FIG. 10 is a schematic diagram of a conventional optical information recording / reproducing apparatus.

FIG. 11 is a schematic diagram showing a configuration of a disk holding device section of a conventional optical information recording / reproducing apparatus.

FIG. 12 is a center side sectional view showing the disc holding device of the A portion of FIG.

FIG. 13 is a center side sectional view showing the disc holding device of section B of FIG.

[Explanation of symbols]

 1 disk body 3 disk body 25 disk alignment adapter 30 spindle 31 magnetic magnet 40 turntable

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 20, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a central side sectional view showing an embodiment of a disk holding device of the present invention, and FIGS. 3 and 4 are central views showing a state in which disks of different specifications are mounted on the disk holding device of the present invention. It is a side sectional view. 1-2 in the figure
9 shows a conventional device of the same or corresponding parts shown in FIGS. 7-11. 1 to 4, 40 is a turntable formed of a magnetic material, 40a is a center hole of the turntable 40 through which the spindle 30 is inserted, and 40b is an engaging piece of an aligning adapter 25 also provided on the turntable 40. Engagement hole 25b is locked, 40c is turntable 4
0 is the disk mounting surface.

Claims (2)

[Claims] 1. A disk holding device of an optical information recording / reproducing apparatus for recording or reproducing information by irradiating an information recording carrier with a light beam, which is formed of a magnetic material and is fixed around a spindle as a rotation center. A turntable, a magnetic magnet fixed in the turntable, and installed in the turntable,
A disk holding device for an optical information recording / reproducing apparatus, which is provided with a disk centering adapter slidable in the axial direction with respect to the spindle. 2. The disk holding device for an optical information recording / reproducing apparatus according to claim 1, wherein the turntable is formed of a magnetic magnet.