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Disc cartridge

A cassette, disc cassette technology for use in magazine/cassette manufacturing equipment, instruments, flat record carrier containers, etc., to solve problems such as recording and/or reproduction errors

Inactive Publication Date: 2004-04-14
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For this disk-shaped recording medium with increased recording density, even small-sized dust and dirt stick to the signal recording area, and recording and / or reproduction errors will occur when recording and / or reproducing information signals.

Method used

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  • Disc cartridge
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Examples

Experimental program
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Embodiment Construction

[0026] Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] The disk cartridge 1 of the embodiment of the present invention includes a magnetic disk 2 housed in a cartridge main body portion 3 and has a diameter of 3.5 inches. The magnetic disk 2 housed in the cartridge main body portion 3 has an increased recording capacity by extending its signal recording area close to the outermost edge.

[0028] A pair of rectangular cartridge halves, namely an upper cartridge half 4 and a lower cartridge half 5 molded from a synthetic resin material, are abutted against and joined together to form a cartridge main body 3 . Such as figure 1 and 2 As shown, the outer edges of the upper and lower disc cartridge halves 4, 5 constituting the disc cartridge main body portion 3 are formed with outer wall portions 6, 7 abutting together to form the outer peripheral surface of the disc main body portion 3. The fro...

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PUM

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Abstract

A disc cartridge housing a magnetic disc includes an engagement projection formed in the vicinity of a corner of one of the upper and lower cartridge halves so that the distal end of the engagement projection is engaged with the other cartridge half, an insertion hole formed in the other cartridge half so as to be passed through by the engagement projection of the one of the upper and lower cartridge halves and an abutment protuberantly formed around the engagement projection for compressing against the rim portion of the insertion hole formed in the other cartridge half. The engagement projection protruded from the insertion hole has its distal end heated and swollen out by a non-vibration type heating system to form a retainer to unify the upper and lower cartridge halves to complete a main cartridge body portion.

Description

technical field [0001] The present invention relates to a cartridge-type disc with disc-shaped recording medium such as a magnetic disc, in particular to a connection structure in which the upper and lower halves of the disc-case form the main body of the disc-case to hold the disc-shaped recording medium. Background technique [0002] A disc cartridge used to hold disc-shaped recording media such as magnetic disks and magneto-optical discs. The main body of the disc case is composed of a pair of upper and lower half disc cases. The disc-shaped recording medium is rotatably installed on the main body of the disc case. formed on the serving portion. [0003] Formed with recording / reproducing hole oppositely on the main body of the disc case, the signal recording area of ​​the disc-shaped recording medium contained in the disc-loading part is allowed to straddle a part of the inner and outer edges to expose outside, and be located at the recording / reproducing area. The record...

Claims

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Application Information

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IPC IPC(8): G11B23/03G11B23/113
CPCG11B23/0316G11B23/0326G11B23/113G11B23/03
Inventor 目黑浩
Owner SONY CORP
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