JPH05198124A - Disk cassette - Google Patents

Disk cassette

Info

Publication number
JPH05198124A
JPH05198124A JP29184892A JP29184892A JPH05198124A JP H05198124 A JPH05198124 A JP H05198124A JP 29184892 A JP29184892 A JP 29184892A JP 29184892 A JP29184892 A JP 29184892A JP H05198124 A JPH05198124 A JP H05198124A
Authority
JP
Japan
Prior art keywords
case
elastic member
shutter
restoring force
coil spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP29184892A
Other languages
Japanese (ja)
Inventor
Manabu Wakabayashi
学 若林
Toru Sanpei
徹 三瓶
Kazutoshi Konno
一俊 紺野
Kihachiro Minami
喜八郎 南
Hidefumi Goto
英文 後藤
Isao Utsugi
勲 宇都木
Yoshio Ouchi
義男 大内
Katsuhiro Shiobara
克宏 塩原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP29184892A priority Critical patent/JPH05198124A/en
Publication of JPH05198124A publication Critical patent/JPH05198124A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To surely energize a shutter so as to always close a head window by surely holding both end parts of an elastic member of a torsion coil spring, etc., set up in a corner area of a case in a prescribed position in the disk cassette. CONSTITUTION:A shutter opening and closing means 9 is capable of moving linearly along an outer periphery of the case 6, and possesses a projecting part 19 equipped with a 2nd detaining part 20 protruded from the side of the outer periphery of the case to the inside, i.e., the side of a disk, whereas the 2nd detaining part 20 possesses a space part having its width in the direction of crossing a moving plane of the shutter, and a side surface of the space part in the widthwise direction has a part of protrusion toward the side of a position of receiving restoring force of the elastic member 11.

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明はディスクカセットに関す
るもので、特にシャッターを付勢するための弾性部材の
端部の保持構造に関するものである。 【0002】 【従来の技術】従来のディスクカセットにおいては、記
録媒体のディスクがヘッドウィンドウを有するケースに
入っている。このため、該ヘッドウインドウからほこり
がケース内に侵入してディスク面に付着し易いし、ま
た、該ヘッドウインドウを通しディスクを指で保持した
際には、ディスクに指紋も付着し易い。このようにして
ほこりや指紋がディスクに付着すると、再生される信号
にドロップアウトが生じ易い。このため、これらのケー
スの取扱いには細心の注意が必要とされる。 【0003】ケース内へのほこりの侵入やディスクへの
指紋の付着を防止するために、従来、記録または再生動
作を行わない場合、すなわちヘッドウインドウを使用し
ない場合には、該ヘッドウインドウをシャッター部材で
閉鎖しておく構成が公知であり、その一例としては、
(a)実公昭45−10063号公報に記載の構成や
(b)実開昭51−27112号公報に記載の構成があ
る。(a)の構成は、引張りコイルばねの圧縮復元力で
平行移動式シャッター部材を移動させ、ケース(容器)
の窓(ヘッドウインドウ)を自動的に閉鎖させる構成で
あり、(b)の構成は、回転式シャッター部材と同軸に
そのコイル部が支持されたねじりコイルばねのコイル部
を支点とした両端部の回転方向復元力で該シャッター部
材を回転させ、ケースの窓部(ヘッドウインドウ)を自
動的に閉鎖させるようにした構成である。 【0004】また、(c)これらの公知技術をさらに改
善すべく、ねじりコイルばね等曲げ変形を利用する弾性
部材を用い、その両端部間の中間部を非拘束状態にし両
端部に表われる復元力でシャッターを移動させヘッドウ
インドウを確実に閉状態にするようにしたディスクカセ
ットの構成例が、本願発明の発明者等により提案されて
いる。この構成例を図1に示す。本構成例では、弾性部
材としてのねじりコイルばねを、ケースの隅部領域部に
配置してある。このディスクカセットは、ケース1,
6、ディスク4、シャッター3,8、シャッター開閉手
段としてのシャッター開閉用部材9、弾性部材としての
ねじりコイルばね11、を備えて構成される。シャッタ
ー3及び8は、ケース1及び6の内側に回転可能に取り
付けられ、ディスクカセットの非使用時はヘッドウィン
ドウ2及び7を覆うようにされる。ディスク4は、その
中央にハブ5を有する。該ハブ5は、ディスク4の回転
駆動時、駆動力を受けると同時にディスク4の中心位置
出しを精度良く行う働きをする。ねじりコイルばね11
は、ケース6の隅部領域(ケースの隅部を形成する2つ
のケース外縁とディスク4の外縁との間に形成される領
域)15に配されている。シャッター開閉手段としての
シャッター開閉用部材9は、その一端が、シャッター
3,8の外周部に係り、該シャッター3,8の開閉を行
う。シャッター開閉用部材9の他端には、外力を受ける
部分としての凸部10がある。該凸部10は、ケース
1,6の外方向に向かって突出し少なくともその先端面
はケース外に対し露出されている。この凸部10の裏側
には凹部13があり、ばね11の一端が該凹部13に挿
入され、ばね11の他端はケース6の内隅部に押し付け
られている。 【0005】図2は、図1におけるねじりコイルばね1
1の組み込み部の一実施例の拡大断面を示す図であり、
凹部13にねじりコイルばね11の一端が挿入され、そ
の復元力でシャッター開閉用部材9が図の上方に押し上
げられている状態を示す。該ねじりコイルばね11の両
端間のコイル部は非拘束の状態にあり上記凹部13に挿
入された上記一端の直線的移動動作に付随してケースの
上記隅部領域内を移動する。このディスクカセットがデ
ィスク駆動装置(図示せず)に装填される時、ディスク
駆動装置側に設けられた爪部14が、ディスクカセット
の挿入等の移動動作につれディスクカセットの側面に設
けた案内面12を案内手段として凸部10を図の下方
(隅部16に近づく側)に直線的に押し下げる。これに
よって、シャッター開閉用部材9がスライドしてシャッ
ター3,8を回転させ、ヘッドウィンドウ2,7を開け
る。反対に、ディスクカセットをディスク駆動装置から
抜き取る時には、爪部14による外力が凸部10から除
去されるため、ねじりコイルばね11が復元力で伸びな
がらシャッター開閉用部材9を図の上方(隅部16から
遠ざかる側)に直線的に押し上げ、シャッター3,8を
回転させてヘッドウィンドウ2,7を閉じさせる。図2
に示す構成例では、弾性部材としてのねじりコイルばね
11の一端が係止される凹部13と、外力を受ける部分
としての凸部10とは、シャッター開閉手段としてのシ
ャッター開閉用部材9のスライド方向に対して同一の位
置に設けられている。 【0006】 【発明が解決しようとする課題】図2に示す構成におい
ては、ねじりコイルばね11の一端が凹部13にさし込
まれているが、該凹部13は、シャッターの移動平面と
交差する方向の側面形状がねじりコイルばね11の端部
を保持できる構成にはなっていないので、ねじりコイル
ばね11の該一端は凹部13よりすべる等してはずれ易
い。該ばね11の一端がはずれるとシャッター3,8が
自由放置の状態になり、振動でシャッター3,8が開い
てしまったり、ディスクカセットをディスク駆動装置よ
り抜いた時にもヘッドウィンドウ2,7が閉じられずに
開いたままになってしまうという欠点がある。また、該
ねじりコイルばね11の他端もケース1,6の内隅部に
押しつけられただけの状態であるため、シャッター3,
8の開閉や運搬時の振動でケース1,6の内隅部からは
ずれ易く、結局、図2の構成においては、ばね11全体
がケース6の隅部領域の所定位置に位置決め保持されず
にはずれてしまい易い欠点がある。 【0007】本発明の目的は、ねじりコイルばね等弾性
部材を、ケースの隅部領域に、そのコイル部等中間部を
非拘束状態にしかつその一端を直線移動可能なようにし
て組み込んだ構成のディスクカセットにおいて、上記し
た従来技術における欠点をなくし、いかなる状態におい
ても弾性部材としてのねじりコイルばねをその両端部を
所定位置に確実に保持し常にヘッドウインドウを閉じる
方向にシャッターを付勢できるようにした構造のものを
提供するにある。 【0008】 【課題を解決するための手段】 (イ)記録媒体のディスク(該当一実施例符号4)が略
四角なケース内に包含され、弾性部材(該当一実施例符
号11)の復元力でシャッター(該当一実施例符号3,
8)がシャッター開閉手段(該当一実施例符号9)とと
もに移動され上記ケースのヘッドウインドウが閉状態に
される構成を備えたディスクカセットにおいて、 【0009】(ロ)上記ケースが、上記弾性部材側に開
口を有する第1の係止部(該当一実施例符号21)を隅
部に備え、 【0010】(ハ)上記シャッター開閉手段が、上記隅
部を形成するケース外縁に沿って直線移動可能でかつ該
ケース外縁側から内側の上記ディスク側に突出され第2
の係止部を備えた突起部(該当一実施例符号19)を有
し、該第2の係止部は、上記シャッターの移動平面と交
差する方向に幅を持つ空間部(該当一実施例符号20,
22)を有し、該空間部の幅方向側面は、上記弾性部材
の復元力を受ける位置側に凸な部分(該当一実施例;小
孔20の側面部の一部)を有し、上記弾性部材の復元力
を該凸な部分に受けて上記突起部に直線移動力を与え、 【0011】(ニ)上記弾性部材が、曲げ変形により弾
性復元力を生ずる構成であって、上記ケースの上記隅部
を含む隅部領域に配され、第1の端部(該当一実施例符
号11a)が上記第1の係止部の上記開口内に、また第
2の端部(該当一実施例符号11b)が上記第2の係止
部の上記凸な部分に挿入されそれぞれ上記各係止部に上
記弾性復元力による当接状態で保持され、両端部間の中
間部が非拘束で上記第2の係止部に付随した上記第2の
端部の直線移動に従い上記ディスクの外縁の外側を移動
される構成を有する、構成とする。 【0012】 【作用】弾性部材は、その曲げ変形による復元力でシャ
ッター開閉手段の突起部を付勢して直線移動させシャッ
ターをしてケースのヘッドウインドウを自動的に閉じさ
せる。 【0013】 【実施例】本発明のディスクカセットの実施例を図3〜
図5により説明する。図3は本発明のディスクカセット
の一実施例構造の部分斜視図である。本実施例では、図
3に図示されないディスクカセットの他の部分について
は、既に図1及び図2で説明した従来構造例と同じであ
るためその説明を省く。図3の実施例は、ケース6、シ
ャッター開閉手段の一実施例としてのシャッター開閉用
部材9、及び弾性部材としてのねじりコイルばね11を
備えるシャッター3,8の開閉用駆動機構部の構成であ
る。 【0014】シャッター開閉用部材9の端部には、ケー
ス6の内側に向かって該シャッター開閉用部材9と直角
方向に突起部19が設けられている。該突起部19には
第2の係止部(の空間部)としての小孔20とスリット
22とが設けられ、ねじりコイルばね11の一端11b
は、コの字状あるいはロの字状に折り曲げられ、小孔2
0にはめられ、突起部19をゆるやかにはさみ込むよう
にされている。ねじりコイルばね11の一端11b(第
2の端部)の上記折り曲げられた部分の一部は、小孔2
0の深さ方向(シャッターの移動平面と直角な方向)側
面の一部分であってねじりコイルばね11の復元力を受
ける位置側の凸な部分の一部に該復元力で押しつけられ
該部分において保持される。該ねじりコイルばね11の
該一端11bと該小孔20とは、小孔20の側面の上記
ばね端部11bが押しつけられた部分を中心として該ば
ね端部11bが回転する滑らかな節を形成すると同時
に、ねじりコイルばね11をしてシャッター開閉用部材
9と確実に連結せしめ振動等によって連結がはずれない
ようにしている。本実施例の場合、スリット22の幅は
小孔20の全幅よりも小さくされている。突起部19
は、シャッタ−3,8を移動させてヘッドウインドウ
2,7を開閉すべく、ねじりコイルばね11の端部11
bとともにケ−ス外縁に沿って直線移動する。 【0015】また、ねじりコイルばね11の他端11a
(第1の端部)は、ケース6の内部の隅部16にあって
ねじりコイルばね11側に開口を有する窪部21に挿入
されている。該端部11aは、ねじりコイルばね11の
復元力によって窪部21内に挿入状態で押し付けられ該
窪部21の内側壁においてもその動きを規制されるの
で、振動等によっても該窪部21からはずれることがな
い。また、シャッター開閉用部材9には常にねじりコイ
ルばね11の復元力が与えられるので、ディスクカセッ
トの非使用時、ウィンドウ2,7はシャッター3,8に
より常に確実に閉じられることになる。ケース6に設け
られた溝30にはシャッター開閉用部材9の被案内部4
0が係合され、該シャッター開閉用部材9の往復動を案
内する。ねじりコイルばね11の両端部11a,11b
間の中間部、特にコイル部11cは、端部11bの直線
移動動作に従ってディスク4の外縁の外側を非拘束状態
で移動される。 【0016】図4は本発明の第2の実施例を示し、凸部
10と突起部19とをシャッター開閉用部材9の移動方
向に対し互いに離れた位置に設けた構成例である。ねじ
りコイルばね11の端部11bは、上記第1の実施例の
場合と同様に、曲げられた部分が、突起部19に設けた
小孔20の深さ方向側面部のねじりコイルばね11の復
元力を受ける位置側の凸な部分に挿入され該部分に復元
力で押しつけられて保持されかつ該凸な部分に対し滑ら
かに回転可能なようにされている。さらに、本実施例に
おいても、端部11bは、ロの字状に曲げられているた
め突起部のばね端係止部において一層確実に保持され該
係止部からはずれることはない。また、本実施例では、
凸部10と突起部19とをシャッター開閉用部材9の移
動方向に対し互いに離れた位置に設けてあるため、凸部
10の位置設計及び突起部19の位置設計を互いに独立
に行うことができ、設計上及び製作上の自由度を大きく
できる。 【0017】第5図は本発明の第3の実施例を示し、シ
ャッター開閉用部材9に設けた突起部19の突出方向
に、小孔20に続けてスリット22を設けた構造であ
る。本実施例の場合、スリット22の幅はねじりコイル
ばね11の素線径よりも狭い。シャッター開閉用部材9
をプラスチック等で作ることにより、突起部19は弾性
を有する構成にできるため、該ねじりコイルばね11の
素線径よりも狭いスリット22でも、ねじりコイルばね
11は、その端部11bの曲がり部が、スリット22を
押し広げながら該スリット22を通って小孔20内に挿
入された後該小孔20の側面に図のように復元力で押し
つけられる。また、該ばね11の復元力の分力は、同図
でシャッター開閉用部材9の長手上方向の成分及びそれ
と直角な凸部10方向の成分とに分けられるから、スリ
ット22の方向が、突起部19の下方(シャッター開閉
用部材9の長手下方向)からその直角方向(突起部19
の突出方向)を結ぶ範囲にあれば、該ばね11の端部1
1bは小孔20より抜けることはない。 【0018】 【発明の効果】以上、詳述したごとく本発明によれば、
シャッター開閉手段に対する弾性部材の連結を滑らかで
かつはずれないものにできる。また、該弾性部材のケー
スに対する係止の構成も簡易構成のかつはずれないもの
にできる。このため、シャッターは確実に閉じるように
でき、ほこりの侵入や指紋の付着等を確実に防止でき
る。また、製作上も、弾性部材をケース内に組込む時の
組立性を飛躍的に改善でき、低コスト化等を容易に実現
できる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cassette, and more particularly to a structure for holding an end of an elastic member for urging a shutter. In a conventional disc cassette, a disc of a recording medium is contained in a case having a head window. For this reason, dust easily enters the case from the head window and adheres to the disk surface, and when the disk is held through the head window with fingers, fingerprints also easily adhere to the disk. If dust or fingerprints adhere to the disc in this way, the reproduced signal is likely to drop out. For this reason, extreme care must be taken in handling these cases. In order to prevent dust from entering the case and sticking fingerprints to the disk, conventionally, when the recording or reproducing operation is not performed, that is, when the head window is not used, the head window is used as a shutter member. It is known that the structure is closed by, for example,
(A) Japanese Utility Model Publication No. 45-10063 and (b) Japanese Utility Model Publication No. 51-27112. In the configuration of (a), the translational shutter member is moved by the compression restoring force of the tension coil spring, and the case (container) is
Is a structure for automatically closing the window (head window) of (1), and the structure of (b) has a structure in which both ends of the torsion coil spring whose coil portion is supported coaxially with the rotary shutter member are fulcrum. The shutter member is rotated by the restoring force in the rotation direction, and the window portion (head window) of the case is automatically closed. (C) In order to further improve these known techniques, an elastic member utilizing bending deformation, such as a torsion coil spring, is used, and the intermediate portion between both ends thereof is made unrestrained and the restoration appears at both ends. The inventors of the present invention have proposed a structural example of a disk cassette in which the shutter is moved by force to surely close the head window. An example of this configuration is shown in FIG. In this configuration example, the torsion coil spring as the elastic member is arranged in the corner area of the case. This disc cassette is case 1,
6, a disk 4, shutters 3, 8, a shutter opening / closing member 9 as shutter opening / closing means, and a torsion coil spring 11 as an elastic member. The shutters 3 and 8 are rotatably mounted inside the cases 1 and 6, and cover the head windows 2 and 7 when the disc cassette is not used. The disk 4 has a hub 5 in its center. The hub 5 receives a driving force when the disk 4 is rotationally driven, and at the same time, functions to accurately position the center of the disk 4. Torsion coil spring 11
Are arranged in a corner area 15 of the case 6 (an area formed between the two outer edges of the case forming the corner of the case and the outer edge of the disc 4) 15. One end of the shutter opening / closing member 9 as the shutter opening / closing means engages with the outer peripheral portions of the shutters 3 and 8 to open / close the shutters 3 and 8. At the other end of the shutter opening / closing member 9, there is a convex portion 10 as a portion that receives an external force. The convex portion 10 projects toward the outside of the cases 1 and 6, and at least its tip end surface is exposed to the outside of the case. A concave portion 13 is provided on the back side of the convex portion 10, one end of the spring 11 is inserted into the concave portion 13, and the other end of the spring 11 is pressed against an inner corner portion of the case 6. FIG. 2 shows a torsion coil spring 1 shown in FIG.
2 is a diagram showing an enlarged cross section of an example of the built-in portion of FIG.
One end of the torsion coil spring 11 is inserted into the concave portion 13, and the shutter opening / closing member 9 is pushed upward by the restoring force thereof. The coil portion between both ends of the torsion coil spring 11 is in an unrestrained state, and moves in the corner area of the case along with the linear movement operation of the one end inserted into the recess 13. When this disc cassette is loaded into a disc drive (not shown), the claw portion 14 provided on the side of the disc drive is provided with a guide surface 12 provided on the side surface of the disc cassette as the disc cassette is moved such as inserted. The convex portion 10 is linearly pushed downward in the drawing (on the side closer to the corner portion 16) by using as a guide means. As a result, the shutter opening / closing member 9 slides to rotate the shutters 3 and 8 and open the head windows 2 and 7. On the contrary, when the disc cassette is pulled out from the disc drive device, the external force by the claw portion 14 is removed from the convex portion 10, so that the torsion coil spring 11 is stretched by the restoring force and the shutter opening / closing member 9 is moved upward in the drawing (corner portion). It is pushed linearly to the side away from 16) and the shutters 3 and 8 are rotated to close the head windows 2 and 7. Figure 2
In the configuration example shown in (1), the concave portion 13 to which one end of the torsion coil spring 11 as an elastic member is locked and the convex portion 10 as a portion that receives an external force are the sliding direction of the shutter opening / closing member 9 as shutter opening / closing means. Are provided at the same position with respect to. In the structure shown in FIG. 2, one end of the torsion coil spring 11 is inserted into the recess 13, which recess intersects the plane of movement of the shutter. Since the side surface in the direction is not configured to hold the end of the torsion coil spring 11, the one end of the torsion coil spring 11 is easily slipped from the recess 13 by slipping. When one end of the spring 11 is disengaged, the shutters 3 and 8 are left free, and the shutters 3 and 8 open due to vibration, and the head windows 2 and 7 close even when the disc cassette is removed from the disc drive device. There is a drawback that it is left open without being pushed. Further, since the other end of the torsion coil spring 11 is also merely pressed against the inner corners of the cases 1 and 6, the shutter 3,
It is easy for the springs 11 to be displaced from the inner corners of the cases 1 and 6 due to the opening / closing of 8 and vibration during transportation. Consequently, in the configuration of FIG. There is a drawback that it is easy to get it. An object of the present invention is to install an elastic member such as a torsion coil spring in a corner area of a case such that an intermediate portion such as a coil portion is unrestrained and one end thereof is linearly movable. In a disk cassette, the above-mentioned drawbacks of the prior art are eliminated, and in any state, the torsion coil spring as an elastic member is surely held at both ends at predetermined positions so that the shutter can always be biased in the direction to close the head window. It is in the provision of the structure. (A) A disk of a recording medium (corresponding to one embodiment reference numeral 4) is contained in a substantially rectangular case, and an elastic member (corresponding to one embodiment reference numeral 11) has a restoring force. And shutter (corresponding one embodiment reference numeral 3,
(8) A disk cassette having a structure in which the head window of the case is closed by moving the shutter opening / closing means (corresponding to one embodiment reference numeral 9). (B) The case has the elastic member side. A corner is provided with a first locking portion (corresponding to one embodiment reference numeral 21) having an opening, and (c) the shutter opening / closing means is linearly movable along the outer edge of the case forming the corner. And protruding from the outer edge side of the case toward the inner disk side,
Has a protrusion (corresponding to one embodiment reference numeral 19), and the second locking portion has a space portion having a width in a direction intersecting the movement plane of the shutter (corresponding to one embodiment). Reference numeral 20,
22), and the width direction side surface of the space portion has a convex portion (corresponding one embodiment; a part of the side surface portion of the small hole 20) toward the position receiving the restoring force of the elastic member, The convex portion receives the restoring force of the elastic member to give a linear moving force to the protrusion, and (d) the elastic member is configured to generate an elastic restoring force by bending deformation. The first end portion (corresponding to one embodiment reference numeral 11a) is disposed in the corner area including the corner portion, and the first end portion (corresponding to one embodiment reference numeral 11a) is inside the opening of the first locking portion, and the second end portion (corresponding to one embodiment embodiment). Reference numeral 11b) is inserted in the convex portion of the second locking portion and is held in contact with each of the locking portions by the elastic restoring force, and the intermediate portion between both ends is unconstrained. 2 is configured to be moved outside the outer edge of the disk in accordance with the linear movement of the second end portion associated with the second locking portion. It is configured. The elastic member urges the projection portion of the shutter opening / closing means to linearly move by the restoring force due to the bending deformation and linearly moves the shutter to automatically close the head window of the case. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the disk cassette of the present invention is shown in FIGS.
This will be described with reference to FIG. FIG. 3 is a partial perspective view of the structure of an embodiment of the disc cassette of the present invention. In this embodiment, the other parts of the disc cassette not shown in FIG. 3 are the same as those of the conventional structure example already described with reference to FIGS. 1 and 2, and the description thereof will be omitted. The embodiment of FIG. 3 has a configuration of a drive mechanism for opening / closing the shutters 3, 8 including a case 6, a shutter opening / closing member 9 as an example of shutter opening / closing means, and a torsion coil spring 11 as an elastic member. .. A projecting portion 19 is provided at the end of the shutter opening / closing member 9 in a direction perpendicular to the shutter opening / closing member 9 toward the inside of the case 6. The projecting portion 19 is provided with a small hole 20 and a slit 22 as (the space portion of) the second locking portion, and one end 11b of the torsion coil spring 11 is provided.
Is bent into a U-shape or a U-shape, and the small hole 2
It is fitted in 0 and the projection 19 is inserted gently. Part of the bent portion of the one end 11b (second end) of the torsion coil spring 11 is the small hole 2
A part of the side surface in the depth direction of 0 (direction perpendicular to the plane of movement of the shutter), which is a part of the convex portion on the position side where the restoring force of the torsion coil spring 11 is received, is pressed by the restoring force and held at that part. To be done. The one end 11b of the torsion coil spring 11 and the small hole 20 form a smooth knot in which the spring end 11b rotates about the portion of the side surface of the small hole 20 against which the spring end 11b is pressed. At the same time, the torsion coil spring 11 is used to securely connect the shutter opening / closing member 9 so that the connection cannot be disconnected due to vibration or the like. In the case of this embodiment, the width of the slit 22 is smaller than the entire width of the small hole 20. Protrusion 19
Is to move the shutters 3 and 8 to open and close the head windows 2 and 7.
It moves linearly along the outer edge of the case with b. The other end 11a of the torsion coil spring 11
The (first end portion) is inserted in a recess portion 21 having an opening on the side of the torsion coil spring 11 at a corner portion 16 inside the case 6. The end portion 11a is pressed into the recess 21 in an inserted state by the restoring force of the torsion coil spring 11 and its movement is restricted also on the inner side wall of the recess 21. It does not come off. Further, since the restoring force of the torsion coil spring 11 is always applied to the shutter opening / closing member 9, the windows 2 and 7 are always reliably closed by the shutters 3 and 8 when the disc cassette is not used. In the groove 30 provided in the case 6, the guided portion 4 of the shutter opening / closing member 9 is provided.
0 is engaged to guide the reciprocating movement of the shutter opening / closing member 9. Both ends 11a, 11b of the torsion coil spring 11
The intermediate portion between them, particularly the coil portion 11c, is moved outside the outer edge of the disk 4 in an unrestrained state in accordance with the linear movement operation of the end portion 11b. FIG. 4 shows a second embodiment of the present invention, which is an example of the structure in which the projection 10 and the projection 19 are provided at positions separated from each other in the moving direction of the shutter opening / closing member 9. As in the case of the first embodiment, the bent portion of the end portion 11b of the torsion coil spring 11 is the restoration of the torsion coil spring 11 on the side surface in the depth direction of the small hole 20 formed in the protrusion 19. It is inserted into a convex portion on the side where the force is received, pressed and held by the convex portion with a restoring force, and can be smoothly rotated with respect to the convex portion. Further, in the present embodiment as well, since the end portion 11b is bent in a square shape, it is held more securely at the spring end engaging portion of the protrusion and is not disengaged from the engaging portion. Further, in this embodiment,
Since the protrusion 10 and the protrusion 19 are provided at positions separated from each other with respect to the moving direction of the shutter opening / closing member 9, the position design of the protrusion 10 and the position design of the protrusion 19 can be performed independently of each other. The degree of freedom in design and manufacture can be increased. FIG. 5 shows a third embodiment of the present invention, which has a structure in which a slit 22 is provided following a small hole 20 in the projecting direction of the projection 19 provided on the shutter opening / closing member 9. In the case of this embodiment, the width of the slit 22 is narrower than the wire diameter of the torsion coil spring 11. Shutter opening / closing member 9
Since the protrusion 19 can be made to have elasticity by making it from plastic or the like, even in the slit 22 that is narrower than the wire diameter of the torsion coil spring 11, the torsion coil spring 11 has a bent portion at its end 11b. While being expanded, the slit 22 is inserted into the small hole 20 through the slit 22 and then pressed against the side surface of the small hole 20 with a restoring force as shown in the figure. Further, since the component force of the restoring force of the spring 11 is divided into a component in the longitudinal upper direction of the shutter opening / closing member 9 and a component in the direction of the convex portion 10 perpendicular to the component in the same figure, the direction of the slit 22 is a protrusion. From below the portion 19 (downward in the longitudinal direction of the member 9 for opening and closing the shutter), in the direction perpendicular thereto (projection portion 19
End portion 1 of the spring 11 within a range connecting
1b does not come out through the small hole 20. As described above in detail, according to the present invention,
The connection of the elastic member to the shutter opening / closing means can be made smooth and non-detachable. Further, the structure for locking the elastic member with respect to the case can be made simple and non-detachable. Therefore, the shutter can be surely closed, and it is possible to reliably prevent dust from entering and fingerprints from attaching. Further, also in manufacturing, it is possible to dramatically improve the assembling property when the elastic member is assembled in the case, and it is possible to easily realize cost reduction and the like.

【図面の簡単な説明】 【図1】従来例を示す図である。 【図2】図1の要部拡大断面図である。 【図3】本発明のディスクカセットの第1の実施例を示
す部分斜視図である。 【図4】本発明のディスクカセットの第2の実施例を示
す部分斜視図である。 【図5】本発明のディスクカセットの第2の実施例を示
す部分斜視図である。 【符号の説明】 1、6…ケース、 2、7…ヘッドウィンドウ、 3、8…シャッタ−、 4…ディスク、 9…シャッター開閉用部材(シャッター開閉手段)、 10…凸部、 11…ねじりコイルばね(弾性部材)、 19…突起部、 20…小孔、 21…窪部、 22…スリット、 30…溝(案内溝)、 40…被案内部。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a conventional example. FIG. 2 is an enlarged sectional view of a main part of FIG. FIG. 3 is a partial perspective view showing a first embodiment of the disc cassette of the present invention. FIG. 4 is a partial perspective view showing a second embodiment of the disc cassette of the present invention. FIG. 5 is a partial perspective view showing a second embodiment of the disc cassette of the present invention. [Explanation of reference numerals] 1, 6 ... Case, 2, 7 ... Head window, 3, 8 ... Shutter, 4 ... Disc, 9 ... Shutter opening / closing member (shutter opening / closing means), 10 ... Convex portion, 11 ... Torsion coil Spring (elastic member), 19 ... Projection part, 20 ... Small hole, 21 ... Depression, 22 ... Slit, 30 ... Groove (guide groove), 40 ... Guided part.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 南 喜八郎 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所家電研究所内 (72)発明者 後藤 英文 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所家電研究所内 (72)発明者 宇都木 勲 茨城県日立市東多賀町一丁目1番1号 株 式会社日立製作所多賀工場内 (72)発明者 大内 義男 茨城県日立市東多賀町一丁目1番1号 株 式会社日立製作所多賀工場内 (72)発明者 塩原 克宏 茨城県日立市東多賀町一丁目1番1号 株 式会社日立製作所多賀工場内   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kihachiro Minami             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Company, Hitachi, Ltd. Home Appliances Research Center (72) Inventor Goto Hidefumi             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Company, Hitachi, Ltd. Home Appliances Research Center (72) Inventor Isao Utsuki             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Ceremony company Hitachi Ltd. Taga factory (72) Inventor Yoshio Ouchi             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Ceremony company Hitachi Ltd. Taga factory (72) Inventor Katsuhiro Shiobara             1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture             Ceremony company Hitachi Ltd. Taga factory

Claims (1)

【特許請求の範囲】 1.記録媒体のディスクが略四角なケース内に包含さ
れ、弾性部材の復元力でシャッターがシャッター開閉手
段とともに移動され上記ケースのヘッドウインドウが閉
状態にされる構成を備えたディスクカセットにおいて、 上記ケースが、 上記弾性部材側に開口を有する第1の係止部を隅部に備
え、 上記シャッター開閉手段が、 上記隅部を形成するケース外縁に沿って直線移動可能で
かつ該ケース外縁側から内側の上記ディスク側に突出さ
れ第2の係止部を備えた突起部を有し、該第2の係止部
は、上記シャッターの移動平面と交差する方向に幅を持
つ空間部を有し、該空間部の幅方向側面は、上記弾性部
材の復元力を受ける位置側に凸な部分を有し、上記弾性
部材の復元力を該凸な部分に受けて上記突起部に直線移
動力を与え、 上記弾性部材が、 曲げ変形により弾性復元力を生ずる構成であって、上記
ケースの上記隅部を含む隅部領域に配され、第1の端部
が上記第1の係止部の上記開口内に、また第2の端部が
上記第2の係止部の上記凸な部分に挿入され、それぞれ
上記各係止部に上記弾性復元力による当接状態で保持さ
れ、両端部間の中間部が非拘束で上記第2の係止部に付
随した上記第2の端部の直線移動に従い上記ディスクの
外縁の外側を移動される構成を有する、 ことを特徴とするディスクカセット。
[Claims] 1. In a disk cassette having a structure in which a disk of a recording medium is contained in a substantially rectangular case, and the shutter is moved together with the shutter opening / closing means by the restoring force of an elastic member to close the head window of the case, the case is A first locking portion having an opening on the side of the elastic member is provided at a corner, and the shutter opening / closing means is linearly movable along an outer edge of the case forming the corner and is located inside the outer edge of the case. The projection includes a protrusion protruding toward the disc side and having a second locking portion, and the second locking portion has a space having a width in a direction intersecting with a moving plane of the shutter. The widthwise side surface of the space portion has a convex portion on the position side for receiving the restoring force of the elastic member, receives the restoring force of the elastic member on the convex portion, and gives a linear moving force to the protrusion, The elastic member A structure for generating an elastic restoring force by bending deformation, the elastic member is arranged in a corner area including the corner of the case, and the first end portion is in the opening of the first locking portion, The two end portions are inserted into the convex portions of the second locking portion, are held in contact with the respective locking portions by the elastic restoring force, and the intermediate portion between the both end portions is unconstrained. A disc cassette characterized in that it is moved outside the outer edge of the disc in accordance with the linear movement of the second end portion that accompanies the second locking portion.
JP29184892A 1992-10-30 1992-10-30 Disk cassette Pending JPH05198124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29184892A JPH05198124A (en) 1992-10-30 1992-10-30 Disk cassette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29184892A JPH05198124A (en) 1992-10-30 1992-10-30 Disk cassette

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP56205344A Division JPS58203680A (en) 1981-12-21 1981-12-21 Disk cassette

Publications (1)

Publication Number Publication Date
JPH05198124A true JPH05198124A (en) 1993-08-06

Family

ID=17774205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29184892A Pending JPH05198124A (en) 1992-10-30 1992-10-30 Disk cassette

Country Status (1)

Country Link
JP (1) JPH05198124A (en)

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