JPS59153673U

JPS59153673U - Disk cassette for recording and playback

Info

Publication number: JPS59153673U
Application number: JP4561183U
Authority: JP
Inventors: 根本　常夫; 澤　哲夫
Original assignee: ソニー株式会社
Priority date: 1983-03-29
Filing date: 1983-03-29
Publication date: 1984-10-15

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 drawings]

第１図は従来例を示す図でコイルばねのガイド構造を示
す要部の縦断面図、第２図〜第１２図は本考案を適用し
た記録再生用ディスクカセットの一実施例を示したもの
で、第２図はシャッターを分解して示したカセット筐体
の斜視図、第３Ａ図及び第３Ｂ図はシャッターによるカ
セット筐体のヘッド挿入孔の開閉状況を説明する要部の
斜視図、第４図はシャッターの一部切欠き斜視図、第５
Ａ図及び第５Ｂ図はシャッターのロック構造を説明する
要部の斜視図、第６図はシャッターを外して示したカセ
ット筐体要部の下面図、第７図は第６−図の■−■線矢
視拡大断面図、第８図はシャッターの組立要領を説明す
る要部の下面図、第９図は第６図のＩＸ−ＩＸ線矢視拡
大断面図、第１０図〜第１２図は第６図のＸ−Ｘ線矢視
拡大断面図で、第１０図及び第１１図はコイルばねガイ
ド構造の第１の実施例、第１２図は第２の実施例を夫々
示す図である。なお図面に用いられた符号において、１・・・・・・カ
セット筐体、２．３・・・・・・上ハーフ、下ハーフ、
２ｂ、　　３ｂ・・・・・・案内壁、’ｌｃ、　３ｃ・
・・・・・切欠かれた端縁、２ｅ・・・・・・テーパー
面、４・・・・・・ディスク、８・・・・・・パッド及
びヘッド挿入孔、１１・・・・・・シャッター、１１ａ
、１１ｂ・・・・・・上片、下片、１７・・・・・・コ
イルばね１．１７Ｃ・・・・・・巻始め部、である。Fig. 1 is a diagram showing a conventional example, and is a vertical sectional view of the main part showing the guide structure of a coil spring, and Figs. 2 to 12 show an embodiment of a recording/reproducing disk cassette to which the present invention is applied. FIG. 2 is a perspective view of the cassette casing with the shutter disassembled, FIGS. 3A and 3B are perspective views of the main parts explaining how the head insertion hole of the cassette casing is opened and closed by the shutter, and FIG. Figure 4 is a partially cutaway perspective view of the shutter;
Figures A and 5B are perspective views of the main parts to explain the locking structure of the shutter, Figure 6 is a bottom view of the main parts of the cassette case with the shutter removed, and Figure 7 is the ■- of Figure 6-. ■An enlarged sectional view taken along the line arrows, Fig. 8 is a bottom view of the main parts explaining the assembly procedure of the shutter, Fig. 9 is an enlarged sectional view taken along the line IX-IX in Fig. 6, and Figs. 10 to 12. is an enlarged sectional view taken along the line X-X in FIG. 6, FIGS. 10 and 11 are views showing a first embodiment of the coil spring guide structure, and FIG. 12 is a view showing a second embodiment, respectively. . In addition, in the symbols used in the drawings, 1... cassette housing, 2.3... upper half, lower half,
2b, 3b...Guidance wall, 'lc, 3c.
...Notched edge, 2e...Tapered surface, 4...Disk, 8...Pad and head insertion hole, 11... Shutter, 11a
, 11b... upper piece, lower piece, 17... coil spring 1.17C... winding start part.

Claims

[Scope of utility model registration request]

a cassette housing composed of an upper and a lower half and having a head insertion hole formed in at least one of the upper and lower halves; a disk-shaped recording medium rotatably housed within the cassette housing; The upper and lower pieces are integrally provided and have a 3-shaped cross section, and are inserted into the outside of the upper and lower halves from one end edge of the cassette housing and are movably attached along the one end edge. a shutter configured to open and close the head insertion hole on at least one of the upper or lower pieces; and a shutter stretched between the shutter and either of the upper and lower halves at one end edge of the cassette housing. and a coil spring that is partially guided between the notched guide walls of the upper and lower nozzles and urges the shutter back and forth from a position where the head insertion hole is opened to a position where it is closed. In the recording/reproducing disk cassette, the winding start portion of at least one end of the coil spring that is locked to the shutter rides on one of the guide walls even when the shutter is in the closed position. A disc cassette for recording and reproducing, characterized in that the inner surface of the cutout edge portion of the guide wall is formed into a tapered surface.