JPS60111570U

JPS60111570U - magnetic disk cassette

Info

Publication number: JPS60111570U
Application number: JP20147283U
Authority: JP
Inventors: 根本　常夫; 舟山　正教; 治小泉
Original assignee: ソニー株式会社
Priority date: 1983-12-28
Filing date: 1983-12-28
Publication date: 1985-07-29

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の磁気ディスクカセットの一例を示す平面
図、第２図はそのシャッターを開けた状態の部分平面図
、第３図Ａ及びＢは第１図に示したシャッターの平面図
及び側面図、第４図Ａ及びＢは従来の磁気ディスクカセ
ットのシャッタースプリングの平面図及び側面図、第５
図はシャッタースプリングの取付構造を示す第１図に示
したディスクカセットの要部上側面図、第６図はその要
部平面図、第７図及び第８図は夫々第６図の■−■線及
び■二■線の部分断面図、第９図及び第１０図はシャッ
タースプリングの取付作業を説明する要部上側面図及び
要部斜視図、第１１図は第１図に示す磁気ディスクカセ
ットにシャッタースプリングを装着する過程を示す要部
の平面図、第１２図は第１１図ＸＩＩ−ＸＩＩ線による
断面図、第１３図は本考案の磁気ディスクカセットの一
例を示す要部の断面図である。１は上シェル、２は下シェル、３は磁気ディスク、８は
シャッター、１１はシャッタースプリング、１２はコイ
ル部分、１３．１４は腕部、１５．１６は折曲げ部、２
５は段突部、２７は通し部である。第３−図Fig. 1 is a plan view showing an example of a conventional magnetic disk cassette, Fig. 2 is a partial plan view with the shutter open, and Fig. 3 A and B are a plan view and side view of the shutter shown in Fig. 1. Figures 4A and 4B are a plan view and a side view of the shutter spring of a conventional magnetic disk cassette;
The figure is a top side view of the main part of the disk cassette shown in Fig. 1 showing the mounting structure of the shutter spring, Fig. 6 is a plan view of the main part, and Figs. 7 and 8 are respectively shown in Fig. 6. 9 and 10 are top side views and perspective views of essential parts to explain the shutter spring installation work, and Fig. 11 is the magnetic disk cassette shown in Fig. 1. FIG. 12 is a sectional view taken along line XII-XII in FIG. 11, and FIG. 13 is a sectional view of essential parts showing an example of the magnetic disk cassette of the present invention. be. 1 is an upper shell, 2 is a lower shell, 3 is a magnetic disk, 8 is a shutter, 11 is a shutter spring, 12 is a coil portion, 13.14 is an arm portion, 15.16 is a bent portion, 2
5 is a step protrusion, and 27 is a through portion. Figure 3

Claims

[Scope of utility model registration request]

A shutter for opening and closing the head insertion hole is slidably installed in a cassette housing consisting of a pair of shells that accommodates a flexible magnetic disk, and the shutter is biased to a position that closes the head insertion hole. In a magnetic disk cassette in which a shutter spring, which is a torsion coil spring, is installed, a stepped protrusion is provided at a predetermined position on the inner surface of the one shell, and a through portion corresponding to the stepped protrusion is provided on the inner surface of the other shell, A magnetic disk characterized in that the distance between the tip end surface of the step protrusion and the inner surface of the other shell facing the step protrusion is smaller than the thickness g of the coil portion of the shutter spring. cassette.