JPH0628811A - Disk case - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To prevent scratches and dust due to collision between the optical disk and the disk case, and to prevent cracks in the optical disk. [Structure] An optical disk for recording and / or reproducing and / or erasing by using light or light and magnetism is housed.
In an optical disc case provided with an access hole for accessing an optical disc of an optical head using light or light and magnetism, and an opening / closing shutter 3 for opening / closing the access hole, an elastic body is provided on the inner surface side of the opening / closing shutter 3. One end is fixed, and the other end of the elastic body 6 is located at the center hub portion of the optical disc when the opening / closing shutter 3 is closed to press the hub portion to fix the optical disc. When the opening / closing shutter is opened, the elastic body 6 is moved along with opening movement of the shutter. The disk case is configured so that it is housed in a groove provided on the outer surface of the optical disk case and is released from the central hub portion of the optical disk to release the fixation of the optical disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk case containing a so-called optical disk for recording and / or reproducing and / or erasing by using light or light and magnetism, and more specifically, It is possible to prevent vibrations and impacts on the optical disc that are applied during transportation or handling of the disc case containing the optical disc, and thus to prevent scratches and dust on the optical disc surface due to the vibrations and impacts. The present invention relates to a disc case having the optical disc fixing function.

[0002]

2. Description of the Related Art Optical discs typified by magneto-optical discs generally use a method such as sputtering or vapor deposition on the signal side surface of an acrylic resin substrate or polycarbonate resin substrate on which signals are written by injection molding or photopolymer. And a metal thin film layer and a protective film layer are laminated. These optical disks may be used in a great number of fields in the future due to their characteristics such as large capacity and portability,
In recent years, its development has been actively carried out. However, regarding the storage state of these optical discs in the disc case, it can be said that a disc-shaped space corresponding to the size of the optical disc to be stored is created in the disc case and is stored therein.
The optical disc is stored in a completely free state. Since there is a gap between the optical disk and the disk case, the optical disk and the disk case collide with each other due to some vibration or shock due to transportation or the like to generate scratches and dust. This results in cracking and rupture.

The present inventor has arrived at the present invention based on the idea that a collision mechanism between the optical disk and the disk case cannot be avoided by providing an optical disk fixing mechanism in the disk case.

[0004]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to prevent the generation of scratches and dust due to the collision between the optical disk and the disk case, and the cracking of the optical disk. It is intended to provide an optical disc having high reliability in reading and / or the like. That is, the present invention configures a disc case for accommodating an optical disc in order to prevent scratches or cracks in the optical disc due to vibration or impact during transportation or handling of the optical disc, or to prevent dust generation. It is a pursuit of

[0005]

The above-mentioned problems of the present invention are as follows.
"The optical disk for storing and / or reproducing and / or erasing by using light or light and magnetism is housed, and a spindle hole for transmitting rotation to the optical disk and an access hole for accessing an optical head are opened and closed. In a disc case of an optical disc having an opening / closing shutter, an elastic body having one end fixed and the other end opened is provided at a position corresponding to the spindle hole on the inner surface side of the opening / closing shutter. When the opening / closing shutter is closed, the end side is located at the central hub portion of the optical disc and presses the hub portion to fix the optical disc, and when the opening / closing shutter is opened, the optical disc fits in the groove provided on the outer surface of the disc case as the shutter moves. An optical disk fixing portion made of an elastic material, which is configured to release the fixation of the optical disk away from the central hub portion. Is solved by configuring the disk case. ", Characterized in that a. That is,
The gist of the present invention is to utilize the opening / closing movement of an opening / closing shutter for opening / closing a spindle hole and an access hole of a disk case, one end of which is fixed inside the opening / closing shutter and the other end of which fixes an optical disk. In addition, a fixing member for the optical disc, which is made of an elastic body that releases the fixing, is provided.

The present invention will be described below in more detail with reference to the drawings. FIG. 1 is a front view showing an example of a disk case of the present invention, 1 is an optical disk to be stored, 2 is a disk case, 3 is an access hole of an optical head (not shown),
Reference numeral 4 is a spindle hole, 5 is an opening / closing shutter for opening / closing the access hole 3 and the spindle hole 4, 6 is an optical disk fixing member made of an elastic body provided inside the opening / closing shutter 5, and 7 is the surface of the disk case 2. It is a groove portion provided in. FIG. 2 is a sectional view of the disc case taken along the line XX of FIG. 1, and shows an optical disc fixed inside the opening / closing shutter 5 when the opening / closing shutter 5 closes the access hole 3 and the spindle hole 4. FIG. 6 is a diagram showing a relational position between a member 6 and a central hub portion 1 a of the optical disc 1. See also FIG.
Is the disc case in FIG. 2 and its opening / closing shutter 5
FIG. 6 is a cross-sectional view showing the position (storage position) of the optical disk fixing member 6 provided inside the opening / closing shutter 5 when is opened to the left.

That is, according to the present invention, as shown in FIG. 2, an optical disk fixing member 6 made of an elastic material is provided at one end 6a at a position corresponding to the spindle hole 4 of the disk case 2 inside the opening / closing shutter 5. Fixed, other end 6b
Is provided with an elastic body so as to always press the central hub portion 1a of the optical disc 1. When the opening / closing shutter 5 is in a state of closing the spindle hole 4, the elastic body is The optical disk fixing member 6 consisting of holds the optical disk 1 by its central hub portion 1a and stops the movement of the optical disk. When the disc case 2 having the optical disc fixed therein is inserted into a drive device (not shown) and the opening / closing shutter 5 is opened, the opening / closing shutter 5
First, the optical disk fixing member 6 provided on the disk contacts the end 4a of the spindle hole 4 of the disk case 2 (this is also the end of the groove 7 provided on the surface of the disk case), and the open / close shutter is further opened. As the optical disc 5 moves in the opening direction, the optical disc fixing member 6 is pushed upward by the end portion 4a of the spindle hole 4 and enters the groove portion 7 provided on the outer surface of the disc case 2, and proceeds along it. FIG. 3 is a view showing a state in which the opening / closing shutter 5 is fully opened. The optical disk fixing member 6 is composed of the groove portion 7 of the disk case 2, more accurately, the groove portion 7 and the opening / closing shutter 5. The optical disc 1 is set in the gap, the fixing from the optical disc fixing member 6 is released, and the optical disc 1 becomes rotatable.

As described above, in the present invention, the optical disk fixing member 6 made of an elastic material is fixed to the opening / closing shutter 5, and the opening / closing shutter 5 is opened when the optical disk fixing member 6 is inserted into the drive device for writing and reading. At the same time, the optical disc fixing member 6 moves on the groove portion 7 provided in the disc case 2 while following the open / close shutter, so that the optical disc 1 is released from the fixed state and no trouble occurs during writing and reading. On the other hand, when writing, reading, etc. are completed and the device is taken out from the drive device, the opening / closing shutter 5 is closed, and at the same time, the optical disk fixing member 6 moves on the groove portion 7 provided in the disk case 2 while following the opening / closing shutter. The optical disc is fixed because it stops at the central hub portion 1a position and presses the hub portion 1a. In the present invention, when fixing the optical disk by the optical disk fixing member 6, focusing on the central hub portion 1a of the optical disk whose recording area having weak wear resistance occupies most of the area, the optical disk is fixed by the opening / closing shutter. Attach an elastic member inside,
The elastic body holds down the optical disk hub portion with a simple and delicate construction.

The central hub portion 1a of the optical disk has a resin plate 1a1 and a metal plate 1 on the disk substrate as shown in the figure.
It has a structure in which a2 and a2 are adhesively laminated, or a structure in which a metal hub is directly fitted and adhered to the disk substrate. In any case, the optical disk is fixed by pressing with an elastic body. Of course, from the viewpoint of wear resistance on the optical disk, pressing and fixing at the position of the metal plate 1a2 is more preferable than at the position of the resin plate 1a1.

A thin and elastic so-called spring material is used as the fixing member 6 of the optical disk made of the above elastic body. However, in the object of the present invention, there is one that does not generate dust itself. It is preferable to use a stainless material, for example. However, the material is not limited to this, and may be made of a plastic material, for example. Further, it is not necessarily required to be plate-shaped and may be linear.

Further, in the illustrated example, as shown in FIGS. 2 and 3,
The case where the optical disk fixing member 6 is provided at two positions corresponding to the front surface and the back surface of the optical disk has been exemplified, but the effect is obtained even when it is provided corresponding to either the front surface or the back surface of the optical disk. Available. However, in general, in order to exert the effect remarkably, it is more preferable that the optical disc is provided at two positions corresponding to the front surface and the back surface of the optical disk.

Further, in the present specification, the optical disk is light, or light and magnetism, and is used for recording and / or reproducing and / or reproducing.
Alternatively, it is a general term for so-called disc-shaped optical recording media that can be erased, and does not specify its structure or material.

[0013]

The present invention will be further described with reference to the following examples. Example 1: A 5.25-inch magneto-optical disk capable of double-sided writing was used, and this was housed in the disk case shown in FIG. Here, the magneto-optical disk has a substrate made of polycarbonate resin, a metal thin film material is a three-layer film of AlSiN / TbFeCoCr / AlSiN, and a protective layer material is a disk made of polyfunctional urethane acrylate. there were. The disc case is made of a commonly used polycarbonate resin, and the opening / closing shutter is made of stainless steel. This disk case has a groove formed on the surface side at the position shown in FIG. 1 to which a leaf spring (optical disk fixing member) described below can move. That is, a mold for making such a groove was prototyped and injection-molded using the mold. Further, the opening / closing shutter of this disc case has a leaf spring made of a stainless steel material having a shape shown in FIG. 2 on its inner surface, and its non-fixed end comes to the metal plate portion of the central hub portion of the optical disc to open the metal hub portion. It was attached to press. When the opening / closing shutter is opened, the leaf spring enters the groove portion of the disc case,
As described above, it is needless to say that the adjustment is made so that the groove can be easily moved.

A disk case containing the above-mentioned optical disk was used and subjected to a vibration test for 10,000 hours in which forced vibration was applied to the disk case. Also, as a comparative example, the same vibration test as that of the above-mentioned embodiment was performed even when the optical disk was housed in the disk case from which the leaf spring was removed.

The vibration test is a test in which a disk case containing an optical disk is vertically swung with an amplitude of 10 cm, and one reciprocation is set as a set and vibration is given 5 times per second.

In the disc case of the present invention provided with the optical disc fixing member, the dust state after the vibration test is maintained in a very clean state, unlike the initial state before the test, and the disc surface is scratched. The generation state of was not recognized at all. On the other hand, in the case of the comparative example in which the disc fixing member is not provided, the dust state in the disc case is defective because the fine plastic powder is entirely attached to the disc case, and the disc surface has a scratch due to abrasion. It was found in the contact area with the case.

[0017]

According to the present invention, by providing a fixing member for the optical disc in the disc case for accommodating the optical disc, it is possible to prevent an error during writing or reading even during transportation or other strong vibration or shock. It is possible to prevent scratches and dust from being generated on the surface of the optical disc, and obtain a highly reliable optical disc.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a disc case of the present invention.

FIG. 2 is a sectional view of the disk case taken along line XX of FIG.

FIG. 3 is a cross-sectional view of the disc case when the opening / closing shutter is opened in FIG.

[Explanation of symbols]

 1 Optical Disk 1a Optical Disk Hub 1a1 Resin Plate for Optical Disk Hub 1a2 Metal Plate for Optical Disk Hub 2 Disk Case 3 Optical Head Access Hole 4 Spindle Hole 4a Spindle Hole End 5 Open / Close Shutter 6 Elastic Body (Optical Disk Fixing Member) 6a Fixed end of elastic body 6b Non-fixed end of elastic body 7 Disk case groove

Claims (1)

[Claims] 1. Recording and / or recording using light or light and magnetism
Or, in a disc case of an optical disc having an optical disc for reproducing and / or erasing, and having an opening / closing shutter for opening / closing a spindle hole for transmitting rotation to the optical disc and an access hole for accessing an optical head, the opening / closing An elastic body, one end of which is fixed and the other end of which is open, is provided at the position corresponding to the spindle hole on the inner surface side of the shutter, and the elastic body has the open end side located at the central hub portion of the optical disc when the opening / closing shutter is closed. Then, the hub is pressed to fix the optical disk, and when the opening / closing shutter is opened, the optical disk is locked in the groove provided on the outer surface of the disk case as the shutter moves, and the optical disk is released from the central hub of the optical disk to release the fixation. Configured,
A disk case comprising an optical disk fixing member made of an elastic body.