JPS60129983A - Disc cartridge - Google Patents

Abstract

PURPOSE:To improve the cleaning effect of a magnetic disc face and also to stabilize the turning torque by providing a dust storing section collecting dust through a liner between the liner and a jacket case inner wall. CONSTITUTION:A magnetic disc 2 is contained in the jacket case 1 so as to protect the disc. The liner 3 and a plastic sheet 4 such as polyvinyl chloride or polyethylene subject to emboss processing 5 in advance are arranged in the lower side of the magnetic disc 2. The sheet 4 is fixed to the inner wall of the jacket case 1 together with the liner 3. The liner 3 and the sheet 4 are arranged while being fixed to the jacket case 1 even at the upper face of the magnetic disc 2. The dust mixed into the jacket case is wiped by the liner 3 and collected 6 to a slit between the said liner 3 and the sheet 4 through fibers.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a disk cartridge which is a replaceable recording medium, and more specifically, a black dust collecting valley is provided in a liner area on the inner wall of a jacket case. related to disc cartridges.

[Background of the invention]

In conventional disk cartridges, a liner made of V-con/polyester is provided between the inner wall of the jacket case and the magnetic disk, thereby cleaning the surface of the magnetic disk. However, such a liner alone could not provide the sufficient cleaning effect of a magnetic disk when a large amount of dust was present.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge which eliminates the above-mentioned drawbacks of the prior art and is capable of improving the cleaning effect of the magnetic disk surface and stabilizing the rotational torque even in the case of a large amount of dust.

[Summary of the invention]

In order to achieve this object, the present invention includes a jacket case that protects and houses a magnetic disk, a liner that cleans the surface of the magnetic disk, and a liner that has an appropriate embossed shape and that connects the jacket case and the two liners. and a dust storage section provided between the two.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing one embodiment of a disk cartridge according to the present invention. Reference numeral 1 denotes a jacket case, and a magnetic disk 2 is housed inside the jacket case 1 while being protected by it. A liner 3 and a pre-embossed plastic sheet 4 made of vinyl chloride, polyethylene or the like are arranged below the magnetic disk 2 as shown. The sheet 4 is fixed together with the liner 3 to the inner wall of the jacket case 1 by suitable means such as a hot bath or an adhesive. The liner 3 and sheet 4 are also fixed to the jacket case l on the upper surface of the magnetic disk 20 in FIG.

When using a disc cartridge constructed in this way (14), dust mixed into the jacket case is wiped away by the liner 3 and passes through the fibers of the jacket case. The dust is collected as shown by the reference numeral 6 in Fig. 2. The same applies to the liner 3 and sheet 4 provided above the magnetic disk 2. Although it seems that the magnetic disk 2 is falling, the rotational force of the magnetic disk 20 also causes the magnetic disk 2 to be blown away, so that during use, the effect is similar to that of having one installed at the bottom.

As a modification of the leaning function, the sheet 3 may be provided with an embossed shape on the jacket case 1, and the sheet 3 may be omitted.

In terms of the embossed shape, the sheet 4 may be made of a nonwoven fabric or a plate processed into an embossed shape.

The sheet 4 has a thickness of 10 to 100 μm, the embossed shape is circular, inverted ゛, °, or rectangular, and its size is 0.5 μm in diameter.
5 to 5 g, and the depth can be about 0.5 to 1 circle.

In order to better understand the present invention, experimental results for a disk cartridge according to the above embodiment and a disk cartridge as a comparative example prepared by removing the plastic sheet 4 from this disk cartridge are shown below.

As a dust test, approximately 1 to 309 pieces of cigarette ashes were put into both disk cartridges and allowed to adhere to the magnetic disks. After these disk cartridges were installed in a drive and the magnetic disk was rotated for 5 minutes, the number of dropouts (missing signals) that occurred was counted, and the disk cartridges were disassembled and the state of dust adhesion was observed.

Table 1 As shown in Table 1, the number of dropouts in the Examples was significantly lower than in the Comparative Examples. Further, according to the results of disassembly and observation of the disk cartridge, in the example, dust was collected on the embossed portion of the plastic sheet 4, as shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, the cleaning effect of the magnetic disk is improved by providing a dust storage section between the liner and the inner wall of the jacket case to collect the music dust that has passed through the liner. It is possible to provide a disc cartridge with excellent functionality without the drawbacks of the prior art.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing one embodiment of a disk cartridge according to the present invention, and FIG. 2 is a sectional view partially showing essential parts of the disk cartridge shown in FIG. 1... Jacket case, 2... Magnetic disk, 3... Liner, 4... Sheet, 5
...Dust storage section. Wisdom 1 Wisdom 2 (5)

Claims (1)

[Claims] Magnetic 5? (It consists of a jacket case that protects and stores the disk, a liner that cleans the surface of the AiJ magnetic disk, and a dust storage section that has an embossed shape and is provided between the jacket case and the liner.) Disc cartridge with special features.