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Case for magnetic disk

A disk and container technology, applied in the direction of instruments, data recording, packaging, etc., can solve problems such as damage to magnetic heads or magnetic recording media, and achieve the effect of increasing recording density and reducing damage

Active Publication Date: 2007-06-27
RESONAC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the problem is that even with such countermeasures, when the lid is opened and closed, or when the disk is taken out of the container or put back in the container, the disk and the inner surface of the container may rub against each other, which may generate a small amount of dust, which may adhere to the magnetic recording surface, causing damage to the magnetic head or magnetic recording medium of the hard disk device

Method used

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  • Case for magnetic disk
  • Case for magnetic disk
  • Case for magnetic disk

Examples

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Effect test

example 1

[0048]Manufactures disk containers for storing disks with a diameter of 48mm (1.89 inches). The container is made of polycarbonate resin made conductive by mixing carbon powder. The thickness (t) of the magnetic disk was set at 0.508 mm, the chamfering angle (α) was set at 45°, and the width (d) after the chamfering process was set at 0.268 mm. Regarding the shape of the grooves of the disk container, the width (a) of the surface A is set to 0.30 mm, the angle (β) between the surfaces C on either side of each groove is set to 110°, and the width (a) on either side of the groove is set to 110°. The angle (γ) between the surfaces B of the grooves was set at 30°, and the shortest distance (w) between the surfaces B on either side of the groove was set at 1.2 mm.

[0049] Fifty disks were inserted into two such disk containers (25 disks in each container), and after opening and closing the upper cover five times, the dust particles adhering to the magnetic recording surfaces of t...

example 2

[0054] Manufactures disk containers for storing disks with a diameter of 48mm (1.89 inches). The container is made of polycarbonate resin made conductive by mixing carbon powder. The thickness (t) of the magnetic disk was set at 0.508 mm, the chamfering angle (α) was set at 45°, and the width (d) after the chamfering process was set at 0.268 mm. Furthermore, regarding the shape of the grooves of the magnetic disk container, the width (a) of the surface A is set to 0.30 mm, the angle (β) between the surfaces C on either side of each groove is set to 100°, and any one of the grooves The angle (γ) between the surfaces B on the sides was set at 30°, and the shortest distance (w) between the surfaces B on either side of the groove was set at 1.0 mm.

[0055] 25 disks were inserted into one such disk container (25 disks per container), and after taking out and putting in the disks 20 times, the number of dust particles adhering to the magnetic recording surfaces of the 25 disks was...

example 3

[0060] Manufactures disk containers for storing disks with a diameter of 48mm (1.89 inches). The container is made of polycarbonate resin made conductive by mixing carbon powder. The thickness (t) of the magnetic disk was set at 0.508 mm, the chamfering angle (α) was set at 45°, and the width (d) after the chamfering process was set at 0.268 mm. Regarding the shape of the grooves of the disk container, the width (a) of the surface A is set to 0.30 mm, the angle (β) between the surfaces C on either side of each groove is set to 100°, and any one of each groove The angle (γ) between the surfaces B on the sides was set at 30°, and the shortest distance (w) between the surfaces B on either side of the groove was set at 1.0 mm.

[0061] Using one such magnetic disk container and a magnetic disk, the number of dust particles adhering to the magnetic recording surface of the magnetic disk was counted after the magnetic disk was taken out and put in once so that it was forced to cont...

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Abstract

A plurality of band shaped projections are formed in parallel on the interior surfaces of side walls of a magnetic disk case so that grooves are formed in spaces between the projections. Each of the grooves has bottom surface A, a pair of side surfaces B, and inclined surfaces C formed between each surface B and the surface A. The grooves satisfies d <=5 a; w > t; and 2 alpha <= beta, where t is a thickness of a magnetic disk, d is a width of a circumferential surface of the magnetic disk subjected to chamfering, alpha is a chamfer angle, a is a width of the surfaces A, beta is an angle between the surfaces C on either side of each groove, gamma is an angle between the surfaces B, and w is a shortest distance between the surfaces B on either side of each groove.

Description

technical field [0001] This invention relates to magnetic disk containers and claims the benefit of Japanese Patent Application No. 2004-222810 filed on July 30, 2004, the contents of which are incorporated herein by reference. Background technique [0002] In the prior art, Patent Reference 1 (Japanese Unexamined Patent Application, First Publication No. S60-90172) discloses a construction of a disk container in which a case is combined with an upper cover and a lower cover placed on it , the case has a pair of opposite side walls extending along their length, the side walls have grooves for storing disks, and the top and bottom of the case are open. [0003] On inner surfaces of the pair of long side walls of the magnetic disk container, a plurality of grooves for storing magnetic disks are formed in parallel along the length direction of the side walls. Specifically, the groove of the magnetic disk container is formed by forming a plurality of long thin strip-shaped prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D85/57B65D85/86
CPCG11B33/0444
Inventor 谏见俊洋
Owner RESONAC CORP
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