JPH04232644A - Conversion adapter for optical disk - Google Patents

Abstract

PURPOSE:To easily mount an optical disk on a magneto-optical disk device provided with an optical disk recording and reproducing functions. CONSTITUTION:The projecting section 13 which is put in the center hole 2 of an optical disk 1 is formed to an adapter plate 11 and the optical disk 1 is put between the adapter plate 11 and a pressing plate 12. In addition, a shaft hole 16 into which the rotating shaft 3 of a magneto-optical disk device is inserted and an adsorption plate 19 which is magnetically attracted to the magnet 5 of the magneto-optical disk device are provided to the adapter plate 11 and the optical disk 1 is mounted on the magneto-optical disk device by means of a conversion adapter 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conversion adapter for loading an optical disk into a magneto-optical disk device other than a playback device exclusively for optical disks.

0002

[Prior art] Generally, CD (compact disc), C
Optical disks such as D-ROMs and LDs (laser disks) have a center hole in the center, and the hub of the playback device fits into this center hole, and a disk clamp with a magnet clamps the disk from above, allowing playback. loaded into the device. On the other hand, a magneto-optical disk conforming to the ISO standard, which is a replaceable optical disk, has a hub at its center. This hub is magnetically attracted and loaded into the turntable of a magneto-optical disk device that records, plays, and takes out magneto-optical disks. As described above, since optical disks and magneto-optical disks have different loading structures and forms, it has been impossible to load optical disks into magneto-optical disk devices.

On the other hand, Japanese Utility Model Publication No. 1-10790 discloses a cassette that can be loaded into a reproducing device while containing an optical disk. This cassette has a hub that fits into the center hole of the optical disc,
It has a clamp disk that is formed integrally with the hub and supports the optical disk, and the clamp disk is attached within the case body in a spring-biased state. The hub has a guide hole into which the rotating shaft of the playback device engages, and by inserting the rotating shaft into this guide hole, it is possible to load an optical disc in a cassette-housed state. This makes it possible to play back the recordings on the optical disc while it is stored in the cassette. However, even with such a cassette, it has been impossible to load it into a magneto-optical disk device, which is a different type from the playback device, because the structure and form of the cassette are different.

0004

[Problems to be Solved by the Invention] Both optical disks and magneto-optical disks perform recording and reproduction using reflected light from a laser beam irradiated onto a signal forming surface.
An optical disk reproducing device and a magneto-optical disk device have a common hardware configuration for reading and reproducing signals. For this reason, even if all optical disks are placed on a magneto-optical disk, the recorded data can basically be reproduced. However, as previously mentioned, both optical disks and magneto-optical disks have a structure for loading,
Because of the different formats, there was a problem in that the optical disk could not be loaded into a magneto-optical disk device.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical disk conversion adapter that allows an optical disk to be loaded into a magneto-optical disk device.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a protrusion that fits into the center hole of an optical disk and a device that is capable of reproducing the optical disk, but which is different from the type of optical disk reproducing device. an adapter plate having a shaft hole into which a rotating shaft of a magneto-optical disk device is inserted; a holding plate that is fastened to the adapter plate with an optical disk sandwiched between the adapter plate; An adapter for converting an optical disk was constructed by including an adsorption plate that was attached to the adapter plate so as to face the turntable supporting the optical disk around the periphery and was magnetically attracted by the magnet of the turntable.

[0007]

[Operation] In the above structure, the protrusion of the adapter plate is fitted into the center hole of the optical disc, and the optical disc is sandwiched between the adapter plate and the holding plate, thereby mounting the optical disc onto the optical disc. In this installed state, a shaft hole into which the rotating shaft of the magneto-optical disk device is inserted and an adsorption plate that is magnetically attracted to the magnet of the turntable of the magneto-optical disk device are attached to the optical disk, so the optical disk can be attached to the magneto-optical disk. It is now possible to load the device.

[0008] The present invention will be specifically explained below with reference to illustrative embodiments. Note that the same elements in each embodiment are designated by the same reference numerals, thereby omitting redundant explanations.

[0009]

Embodiment 1 FIGS. 1 to 5 show Embodiment 1 of the present invention. As shown in FIG. 3, an optical disc 1 such as a CD, CD-ROM, or LD has a center hole 2 formed therein for loading into a playback device, and the conversion adapter 10 uses this center hole 2 to insert the optical disc. It can be attached to 1.

FIGS. 1 and 2 show a conversion adapter 10, which has an adapter plate 11 and a holding plate 12 that sandwich the optical disc 1 from above and below. The adapter plate 11 comes into contact with the lower surface of the optical disc 1, and has a ring-shaped protrusion 13 formed on the outside of its central portion. This protrusion 13 is formed thinner than the main body of the adapter plate 11, thereby imparting elasticity, and uses this elasticity to fit into the center hole 2 of the optical disc 1. By this fitting, the conversion adapter 11 is centered with respect to the optical disc 1. In this case, the protrusion 13
By forming a guide taper 13a (see FIG. 2) on the outer periphery of the optical disc 1, fitting of the optical disc 1 into the center hole 2 can be facilitated. In addition, this adapter plate 11
A boss portion 14 is formed in the central portion of the
A screw hole 15 is formed in the. Furthermore, adapter plate 1
A shaft hole 16 is formed in the center of the lower surface of the magneto-optical disk device, into which a rotating shaft 3 (see FIG. 1) of a drive motor (not shown) of a magneto-optical disk device is inserted.

The holding plate 12 comes into contact with the upper surface of the optical disc 1 and holds the center portion of the optical disc 1 between it and the adapter plate 11. This holding plate 12 is fastened to the adapter plate 11 with the optical disc 1 sandwiched therebetween, and in this embodiment, screws 17 are screwed into the screw holes 15 of the adapter plate 11.
The holding plate 12 is fastened by this. The holding plate 12 has a ring-shaped thick outer peripheral portion, and an anti-slip material 18 is attached to the lower surface of this outer peripheral portion. The anti-slip material 18 is formed in a ring shape from a rubber-based material or the like, and comes into contact with the optical disc 1 by being attached to the lower surface of the pressing plate 12 . Due to the contact of the anti-slip material 18, the conversion adapter 10 and the optical disk 1 are brought into close contact with each other, preventing relative rotation from now on, and they rotate as one unit. Note that if there is no slippage between the conversion adapter 10 and the optical disc 1 and they rotate together, the anti-slip material 18 may be omitted.

A suction plate 19 made of a magnetic material is attached to the lower surface of the adapter plate 11. As shown in FIG. 1, the suction plate 19 faces the turntable 4 of the magneto-optical disk device, and is magnetically attracted by the magnetic force of the magnet 5 attached to the turntable 4. As a result, the optical disc 1 is fixed on the turntable 4, and does not come off from the turntable 4 during rotation. In order to achieve this effect, it is preferable to use a ferromagnetic material such as an iron plate for the adsorption plate 19, but it is even better to plate the iron plate to impart rust resistance. Further, as the attraction plate 19, a stainless steel mesh plate with a strong magnetic attraction force may be used, or a magnet with a polarity opposite to that of the magnet 5 of the turntable 4 may be used.

FIG. 4 shows a state in which the conversion adapter 10 is attached to the optical disk 1. In this state, the conversion adapter 10 is loaded into a magneto-optical disk device and recorded and reproduced by the same device. That is, as shown in FIG. 1, the magneto-optical disk device includes a tapered rotating shaft 3 of a drive motor, and a turntable that is attached to rotate integrally with this rotating shaft 3 and supports an optical disk 1 around the rotating shaft 3. 4,
The rotating shaft 3 of the drive motor is inserted into the shaft hole 16 of the conversion adapter 10. As a result, the centering of the optical disc 1 is performed via the conversion adapter 10, and the suction plate 1
The magnetic force of the magnet 5 of the turntable 4 acts on the converting adapter 10, which magnetically attracts the converting adapter 10, thereby preventing eccentricity during rotation of the optical disc. Then, when the rotating shaft 3 rotates in this state, the rotational force is transmitted to the conversion adapter 10, and the conversion adapter 10 and the optical disc 1 rotate together, so that recording and reproduction can be performed.

FIG. 5 shows a cassette 6 for storing the optical disc 1.
The case body 7 includes a case body 7 and a lid body 8 that opens and closes with respect to the case body 7. The optical disc 1 is housed in the case body 7 with the conversion adapter 10 attached, the lid 8 is closed, and in this state it can be directly loaded into the magneto-optical disc device. In this case, conversion adapter 1
Loading is performed using 0.

[0015]

Embodiment 2 FIGS. 6 to 10 show variations of Embodiment 2 of the present invention.

The conversion adapter 10 shown in FIG. 6 has a threaded portion 20 formed at the center of the lower surface of the holding plate 12. As shown in FIG. The threaded portion 20 is screwed into the screw hole 15 of the adapter plate 11 to fasten the holding plate 12 to the adapter plate 11, and its thread is threaded in the direction opposite to the rotational direction of the optical disc 1. Therefore, it will not come loose even when the optical disc 1 is started to rotate due to the torque. In addition, with respect to the torque when the rotation of the optical disc 1 is stopped, the adhesive force of the anti-slip material 18 can prevent the screwing from loosening.

In the conversion adapter 10 shown in FIG. 7, the boss portion 14 of the adapter plate 11 is formed to have a large diameter.
is fitted into the center hole 2 of the optical disc 1. In other words, when the holding plate 12 sufficiently holds down the optical disc 1, the conversion adapter 10 can be properly centered with respect to the optical disc 1 simply by fitting the boss portion 14, and thereby the adapter The structure of the plate 11 becomes simple and its molding becomes easy. in this case,
A two-stage guide taper 14a is formed on the outer circumference of the boss portion 14 to facilitate centering thereof.

In the conversion adapter 10 shown in FIG. 8, the boss portion 14 of the adapter plate 11 has a large diameter so that it fits into the center hole 2 of the optical disc 1, and the holding plate 12 and the adapter plate 11 are fastened together using screws 17. This is done by

The conversion adapter 10 shown in FIG. 9 has a thin elastic protrusion 21 formed on the lower surface of the holding plate 12, and this protrusion 21 is elastically fitted into the center hole 2 of the optical disc 1. This is to center the optical disc 1. Further, a threaded portion 20 is formed in the center portion of the lower surface of the holding plate 12, and the holding plate 12 and the adapter plate 11 are fastened by screwing this threaded portion 20 into the screw hole 15 of the adapter plate 11. . In this modification, the threaded portion 20 and the protrusion 21 are integrally formed on the presser plate 12;
The eccentricity between the conversion adapter 10 and the optical disc 1 can be reduced. 21a is a guide taber formed on the outer periphery of the protrusion 21. As shown in FIG.

The conversion adapter 10 shown in FIG. 10 has a ring-shaped boss portion 22 formed on the lower surface of the holding plate 12, and this boss portion 22 is fitted into the center hole 2 of the optical disc 1, similar to that shown in FIG. It has many advantages. 22a
is a guide taper formed on this boss portion 22.

[0021]

Embodiment 3 Both FIGS. 11 and 12 show Embodiment 3 of the present invention. Embodiment 3 shows an application to a case where the optical disc assembly 9 is formed by bonding the back surfaces of two optical discs 1, 1 together, and the capacity is increased by extracting signals from both sides of this assembly 9.

In these figures, the adapter plate 11 has the same structure as in FIG. 2, but the holding plate 12 has a structure adapted to the optical disk assembly 9. On the other hand, the holding plate 12 of the conversion adapter 10 shown in FIG.
A suction plate 23 is attached to its upper surface. This suction plate 23 is made of the same material as the suction plate 19 in the adapter plate 11, and when the optical disk assembly 9 is reversed for recording and reproduction, it faces the magnet 5 of the turntable 4 of the magneto-optical disk device ( (see FIG. 1), it functions in the same way as the adsorption plate 19 on the adapter plate 11. Also,
A shaft hole 24 is formed in the center of the upper surface of the holding plate 12, into which the rotating shaft 3 (see FIG. 1) of the magneto-optical disk device is inserted, and through which the rotational force of the rotating shaft 3 is transmitted. In the illustrated example, the protrusion 13 formed on the adapter plate 11 fits only into the center hole of the lower optical disc of the optical disc assembly 9, but the optical disc assembly 9 has two optical discs 1, Since they are attached so that the center holes of the optical disc assembly 9 are aligned with each other, the centers of the conversion adapter 10 and the optical disc assembly 9 do not shift. In this case, the protrusion 13 may be made higher and fit into the center hole of the two optical discs 1, 1.

The holding plate 12 of the conversion adapter 10 shown in FIG. 12 is fastened to the adapter plate 11 with screws 17, and this holding plate 12 has a hole that elastically fits into the center hole of the optical disk 1 on the upper side of the optical disk assembly 9. protrusion 25
is formed. Thereby, the conversion adapter 10 can be centered with respect to the optical disc assembly 9 both above and below.

[0024]

Effects of the Invention The present invention has a loading member for a magneto-optical disk device, and is loaded onto the optical disk using the center hole of the optical disk. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a loading state of Example 1 of the present invention.

FIG. 2 is an exploded sectional view of Example 1 of the present invention.

FIG. 3 is a perspective view of an optical disc.

FIG. 4 is a perspective view of an optical disc equipped with a conversion adapter.

FIG. 5 is a perspective view of a cassette that stores optical discs.

FIG. 6 is an exploded sectional view of Example 2 of the present invention.

FIG. 7 is an exploded sectional view of a modification of the second embodiment.

FIG. 8 is an exploded sectional view of a modification of the second embodiment.

FIG. 9 is an exploded sectional view of a modification of the second embodiment.

FIG. 10 is an exploded sectional view of a modification of the second embodiment.

FIG. 11 is an exploded sectional view of Example 3 of the present invention.

FIG. 12 is an exploded sectional view of a modification of the third embodiment.

[Explanation of symbols]

1 Optical disc 2 Center hall 3 Rotation axis 4 Turntable 5 Magnet 10 Conversion adapter 11 Adapter plate 12 Holding plate 13 Protrusion 16 Shaft hole 19 Suction plate

Claims (8)

[Claims] Claim 1: It has a protrusion that fits into a center hole of an optical disk, and a shaft hole into which a rotating shaft of a magneto-optical disk device that is capable of playing back an optical disk but is of a different type from an optical disk playback device is inserted. an adapter plate; a holding plate fastened to the adapter plate with the optical disk sandwiched between the adapter plate; An optical disc conversion adapter characterized by comprising an adsorption plate that is attached to the turntable and is magnetically attracted to the magnet of the turntable. 2. The optical disc conversion adapter according to claim 1, wherein the protrusion has a guide taper for centering a center hole of the optical disc. 3. The optical disc conversion adapter according to claim 1, wherein the holding plate is fastened to the adapter plate via screws. 4. The optical disc according to claim 1, wherein the holding plate has a screw thread having a thread opposite to the rotational direction of the optical disc and is fastened to the adapter plate. Conversion adapter. 5. The optical disk conversion adapter according to claim 1, wherein the suction plate is a stainless steel plate. 6. The optical disk conversion adapter according to claim 1, wherein the suction plate is an iron plate whose outer surface is plated. 7. The optical disk conversion adapter according to claim 1, wherein an anti-slip material is provided at a contact portion of the holding plate with the optical disk. 8. The presser plate includes a shaft hole into which the rotating shaft of the magneto-optical disk device is inserted, and an adsorption plate that is magnetically attracted to the magnet of the turntable. Optical disc conversion adapter.