JPS60242562A - disk cartridge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a digital optical disc, a video disc, a P
The present invention relates to a disk cartridge that accommodates a high-density recording disk such as a CM disk.

[Background of the invention]

Conventionally, digital optical discs, video discs, PCM
The surface of high-density recording disks such as disks is protected from scratches, fingerprints, dust, etc.
A method has been devised in which cartridges are used for storage, installation and removal of devices, etc.

However, it is necessary to protect the disk surface from scratches, fingerprints, dust, etc. from the rotation hole for disk rotation and the recording/playback hole for recording/playback, and as a countermeasure, cover the rotation hole and recording/playback hole. However, if the positions of the upper and lower recording/reproducing holes 2a and 2b of the disk cartridge body 1 are different as shown in FIG. 1, the structure of the cover 4 may become complicated or the cover dimensions may It has the disadvantage that it becomes large.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems and to provide a disk cartridge having a simple structure and a small cover.

[Summary of the invention]

In order to achieve the above object, the present invention forms a disk storage space by an upper plate and a lower plate, and provides an opening in each plate located at the center of the disk and the area facing the recording/reproducing head. Insert the disc into the recording/playback device with the disc stored,
In a disk cartridge for recording data on or reproducing recorded data on the surface of a rotated disk, two opposing recording/reproducing helides formed on each of the plates are provided.
The cartridge is characterized in that two openings are arranged in positions that overlap with each other, and when not in use, the openings are closed by a cover having a width dimension smaller than the width of the cartridge.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail using the drawings. FIG. 2 shows an exploded perspective view of a disk cartridge that is an embodiment of the present invention.

In the figure, a disk cartridge 1 stores a disk 5 having a center hole 8 in a disk storage area between an upper plate 6 and a lower plate 7 having a rotation hole 5 and a recording/reproducing hole 2, and an upper plate 6 and a lower plate 7.
is fixed with screws etc. At this time, the recording/reproducing hole 2 of the upper plate 6 and the recording/reproducing hole 2 of the lower plate 7 are in opposing positions.

A cover 4 is attached to the rotation hole 5 and the recording and reproducing hole 2 to protect the disk, and when recording and reproducing, the cover 4 is removed and the disk is inserted into the apparatus.

FIG. 5 is a perspective view showing the disc cartridge 1 in which the cover 4 is fitted with the disc shown in FIG. 2 housed therein.

FIG. 4 shows another embodiment of the present invention, in which the same reference numerals indicate the same components as those in the previous embodiment. Its shape is notch-like, and the thickness of the disk cartridge 1 can be reduced. Although the cover 4 is removed from the disc cartridge during recording and reproduction, it may be slid and stored in the disc cartridge 1.

〔Effect of the invention〕

As described above, in the present invention, the apertures facing the recording/reproducing head are made symmetrical with respect to the disk surface and are arranged at positions overlapping each other, so that the pressure when not in use is high enough to keep the apertures closed. The cover size can be made smaller,
This has the advantage of simplifying the structure.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional disc cartridge with a cover attached, Fig. 2 is an exploded perspective view of a disc cartridge showing an embodiment of the present invention, and Fig. 5 is a disc shown in Fig. 2. FIG. 4 is a perspective view showing an assembled state of the cartridge; FIG. 4 is a perspective view of a disk cartridge showing another embodiment of the present invention; Explanation of symbols 1... Disc cartridge, 2... Recording/playback hole,
5... Rotating hole, 4... Cover, 5... Disc,
6...Second country O 3m Procedural amendment (method) Relationship with the case of the person making the amendment (i Patent applicant 8 yu ts+o), meeting +, Hitachi production agent's amendment order Date: May 8, 1985 (May 2, 1985)
(Shipped on 8th) Contents of amendment

Claims (1)

[Claims] A disk storage space is formed by the upper plate and the lower plate, and an opening is provided in each plate for recording and reproducing the middle 1Q portion of the disk.・An opening is provided at the portion facing the throat, and recording and reproducing is performed with the disk stored inside. In a disk cartridge that is installed in a device and is configured to record data on or reproduce recorded data on the surface of a rotated disk, two openings formed in each of the plates for facing the recording/reproducing head are arranged at mutually overlapping positions. A disk cartridge characterized in that, when not in use, the opening is closed by a cover having a width smaller than the width of the cartridge.