JPS63146373U

JPS63146373U -

Info

Publication number: JPS63146373U
Application number: JP3687187U
Authority: JP
Priority date: 1987-03-13
Filing date: 1987-03-13
Publication date: 1988-09-27

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例のデイスクカセツト
の一部切欠平面図、第２図はトーシヨンバネの係
止状態を説明する斜視図、第３図はトーシヨンバ
ネの係止状態を説明する平面図、第４図は一方の
シエルの要部断面図、第５図は他方のシエルの要
部断面図、第６図は先行技術のデイスクカセツト
の分解斜視図、第７図は同デイスクカセツトの斜
視図、第８図は同デイスクカセツトの一部切欠平
面図、第９図は同部分拡大側面図、第１０図は第
９図中Ｘ―Ｘ線に沿う断面図、第１１図は他の先
行技術のデイスクカセツトの一部切欠平面図、第
１２図は他の先行技術のトーシヨンバネの係止状
態を説明する斜視図である。１……デイスクカセツト、２……デイスク、３
……ケース、３ａ……ヘツド挿入孔、４……シヤ
ツタ、５……トーシヨンバネ、５ｂ……自由端側
の先端部、１０ｅ，１１ｅ……内壁面、１５……
リブ。 FIG. 1 is a partially cutaway plan view of a disk cassette according to an embodiment of the invention, FIG. 2 is a perspective view illustrating the locked state of the torsion spring, and FIG. 3 is a plan view illustrating the locked state of the torsion spring. 4 is a sectional view of a main part of one shell, FIG. 5 is a sectional view of a main part of the other shell, FIG. 6 is an exploded perspective view of a prior art disk cassette, and FIG. 7 is a perspective view of the same disk cassette. Fig. 8 is a partially cutaway plan view of the disk cassette, Fig. 9 is an enlarged side view of the same part, Fig. 10 is a sectional view taken along the line FIG. 12 is a partially cutaway plan view of the disk cassette and a perspective view illustrating the locked state of the torsion spring of another prior art. 1...Disk cassette, 2...Disk, 3
... Case, 3a ... Head insertion hole, 4 ... Shutter, 5 ... Torsion spring, 5b ... Free end side tip, 10e, 11e ... Inner wall surface, 15 ...
rib.

Claims

[Claims for Utility Model Registration] A case that rotatably houses a disk and has a head insertion hole that exposes the disk, a shutter that is slidably attached to the case and opens and closes the head insertion hole; The distal end portion of the free end side provided in the case and bent at a substantially right angle is arranged to move along one of the inner wall surfaces facing each other with a predetermined clearance in the case, In the disk cassette, the disk cassette includes a substantially V-shaped torsion spring that urges the shutter to a position where the head insertion hole is closed, wherein the shutter is located in the vicinity of the free end of the torsion spring opposite to the free end of the torsion spring when the shutter is in the closed state. 1. A disk cassette, characterized in that a rib is formed on at least one inner wall surface to restrict movement of a free end side tip of the torsion spring.