JP4359988B2

JP4359988B2 - Disc cartridge

Info

Publication number: JP4359988B2
Application number: JP2000036837A
Authority: JP
Inventors: 恒久大平
Original assignee: Victor Company of Japan Ltd
Current assignee: Victor Company of Japan Ltd
Priority date: 2000-01-21
Filing date: 2000-02-15
Publication date: 2009-11-11
Anticipated expiration: 2020-02-15
Also published as: JP2001273704A

Description

【０００１】
【発明の属する技術分野】
本発明は、ケース内に両面ディスクを収納したディスクカートリッジに関し、その誤消去防止切換機構に係わる。
【０００２】
【従来の技術】
従来から、光ディスク、磁気ディスク等は、埃や塵、傷、汚れを防ぎ、記録や再生の信頼性を保障するために、ケース内にディスクを収納するカートリッジ形式で用いられてきた。そして、このケースには、ディスクに記録済みの情報を誤って消去したり、書き換えたりしないように、誤消去防止切換機構が設けられている。近年、ディスクに要求される記録容量が大きくなるに伴い、ディスクの両面に記録する両面ディスクが用いられる。この両面ディスクのディスクカートリッジにおいても、ディスクに記録済みの情報を保護するために誤消去防止切換機構が設けられている。
【０００３】
かかる誤消去防止切換機構の第１従来例としては、ケースの表面と裏面とにそれぞれ記録又は消去の可否を検出するための検出孔が設けられ、この各検出孔を別個にそれぞれ開閉する表面側開閉部材及び裏面側開閉部材が設けられている。そして、この表面側開閉部材及び裏面側開閉部材を別々に操作することによって両面の検出孔を別々にそれぞれ開閉できるものである。
【０００４】
又、第２従来例としては、図１６及び図１７に示す特開平７−２７２３９２号公報に開示されたものがある。図１６及び図１７において、ケース５０の表面と裏面とにそれぞれ記録又は消去の可否を検出するための検出孔５１，５２が設けられ、この各検出孔５１，５２を開閉できる単一の開閉部材５３がケース５０内にスライド自在に設けられている。この開閉部材５３の操作部５３ａはケース５０の背面の開口部５４より露出されている。操作部５３ａを操作することによって開閉部材５３がスライドして両面の検出孔５１，５２を同時に開閉できる。つまり、両面の検出孔５１，５２が共に閉じ、又は共に開く位置に位置されるものである。
【０００５】
ところで、誤消去防止切換機構には以下のような要求がある。第１としてディスク両面に跨がって長時間（大量）の情報を記録した場合には、両面の検出孔を一操作で同時に記録・消去禁止に切り換えできることである。第２としてディスク両面に同時記録するシステムに使用する場合には、両面の検出孔を一操作で同時に記録・消去禁止に切り換えできることである。第３として安全を期するため、記録・消去禁止に切り換えるときには、両面の検出孔を一操作で同時に切り換え、記録済みの情報を消去したり書き換えたりするときには、記録・消去可能状態に片面ずつ確かめながら切り換えできることである。第４として、もちろん、片面ずつ別々に記録・消去禁止状態と記録・消去可能状態とに切り換えできることである。
【０００６】
【発明が解決しようとする課題】
しかしながら、前記第１従来例では、両面の検出孔を一操作で開閉できないため、第１〜第３の要求に応えることができない。又、前記第２従来例では、両面の検出孔を一操作で開閉できるが、両面の検出孔を同じ開閉状態にしかできないため、第３及び第４の要求に応えることができない。
【０００７】
そこで、本発明は、前記した課題を解決すべくなされたものであり、上記第１〜第４の要求を満たすべく、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、且つ、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる誤消去防止切換機構を備えたディスクカートリッジを提供することを目的とする。
【０００８】
又、本発明は、上記第１〜第４の要求を満たすべく、両面を同じ記録・消去禁止状態に一操作で同時に切り換え操作でき、且つ、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できると共に、両面を同じ記録・消去可能状態に一操作で同時に切り換え操作できない誤消去防止切換機構を備えたディスクカートリッジを提供することを目的とする。
【０００９】
【課題を解決するための手段】
請求項１の発明は、両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は上下に並んだ位置で前記ケースの背面に開口された操作用開口部より外部に共に露出され、前記双方の操作部における記録・消去可能位置と記録・消去禁止位置とになる操作位置が左右方向で同じ位置に設定されたことを特徴とする。
【００１０】
請求項２の発明は、前記請求項１に記載のディスクカートリッジにおいて、前記操作用開口部は、前記ケースの表面と裏面にまで延びて開口され、この表面と裏面の各開口箇所にまで前記各操作部の一端側が延設されていることを特徴とする。
【００１１】
請求項３の発明は、両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの表面及び裏面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置を中間として一方側の共通記録・消去可能位置と他方側の共通記録・消去禁止位置との間で移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去可能位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去可能位置に位置させ、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させることを特徴とする。
【００１２】
請求項４の発明は、両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの裏面及び表面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置と共通記録・消去禁止位置との間でのみ移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させることを特徴とする。
【００１３】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
【００１４】
図１〜図４は本発明の第１実施形態を示し、図１はディスクカートリッジの斜視図、図２（Ａ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの横断面図、図２（Ｂ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの縦断面図、図２（Ｃ）は表面側開閉部材と裏面側開閉部材の拡大斜視図、図３（Ａ）は誤消去防止切換機構が記録・消去禁止位置であるディスクカートリッジの横断面図、図３（Ｂ）は誤消去防止切換機構が記録・消去禁止位置であるディスクカートリッジの縦断面図、図４（Ａ）は誤消去防止切換機構がディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置であるディスクカートリッジの横断面図、図４（Ｂ）は誤消去防止切換機構がディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【００１５】
図１において、ディスクカートリッジ１は、ディスク２と、このディスク２を収納する偏平方形状のケース３と、このケース３に装着されたシャッタ４とから主に構成されている。
【００１６】
ディスク２は、両面が記録・再生面として構成された両面ディスクであり、通常は表面（Ａ面）を下にしてケース３に収納される。
【００１７】
ケース３は下側ケース部材（特に符号を付さず）と上側ケース部材（特に符号を付さず）とが互いの接合面で突合わされた状態で接合され、ケース３の表面３ａと裏面３ｂとには開口部５がそれぞれ開口されている。この開口部５は、ディスク２にアクセスして情報を記録・再生するヘッド（ピックアップ）が挿入されるヘッド用開口部分と、ディスク２を回転駆動する駆動軸（ターンテーブル）が挿入される駆動用開口部分とから成る。このケース３の表面３ａと裏面３ｂとは、表裏面を表す識別マーク（図示せず）等を除いて同形状に設けられており、表面３ａと裏面３ｂの両面から使用できるように構成されている。
【００１８】
シャッタ４は、ケース３の表面３ａに当接する上面部（特に符号を付さず）と、ケース３の裏面３ｂに当接する下面部（特に符号を付さず）と、これらを連結し、ケース３の前面３ｃに略当接する前面部（特に符号を付さず）とから構成されており、開口部５を塞ぐ閉位置（図１の位置）と開口部５を解放する開位置との間で両方向にスライド自在に設けられている。シャッタ４の両側には、一対のバネ（図示せず）が掛止され、この一対のバネによって閉位置側に付勢されている。
【００１９】
又、ディスクカートリッジ１には誤消去防止切換機構１０が備えられている。この誤消去防止切換機構１０は、図２〜図４に示すように、ケース３の表面３ａと裏面３ｂとにそれぞれ開口する検出孔１１，１２を有する。ケース３の表面３ａの検出孔１１はディスク２の裏面（Ｂ面）用であり、ケース３の裏面３ｂの検出孔１２はディスク２の表面（Ａ面）用である。そして、検出孔１２は表面側開閉部材１３によって開閉され、検出孔１１は裏面側開閉部材１４とによって開閉されている。また、表面側開閉部材１３と裏面側開閉部材１４は、ケース３の背面壁１５とこの背面壁１５に近接して平行に配置された内側壁部１６との間のスライドスペースで左右方向にスライド自在に配置されている。表面側開閉部材１３はその一端側にスライドスペースと略同一寸法の厚みの閉塞部１３ａを有し、この閉塞部１３ａの箇所以外はスライドスペースの略半分の厚みで上方位置に配置されている。裏面側開閉部材１４はその一端側にスライドスペースと略同一寸法の厚みの閉塞部１４ａを有し、この閉塞部１４ａの箇所以外はスライドスペースの略半分の厚みで下方位置に配置されている。
【００２０】
表面側開閉部材１３と裏面側開閉部材１４との各閉塞部１３ａ，１４ａには貫通孔１７，１８がそれぞれ形成されている。この各貫通孔１７，１８が検出孔１２，１１の位置に一致する記録・消去禁止位置（図３（Ａ），（Ｂ）の位置）と、各貫通孔１７，１８が検出孔１２，１１の位置に一致せずに各閉塞部１３ａ，１４ａが各検出孔１２，１１を塞ぐ記録・消去可能位置（図２（Ａ），（Ｂ）の位置）との間で、表面側開閉部材１３と裏面側開閉部材１４とが別々にスライド自在となっている。表面側開閉部材１３と裏面側開閉部材１４との各他端側には、弾性部１３ｂ，１４ｂを介して突起部１３ｃ，１４ｃがそれぞれ設けられている。内側壁部１６の左右位置には各突起部１３ｃ，１４ｃが嵌まり込む凹部１９，２０がそれぞれ２カ所設けられており、記録・消去可能位置と記録・消去禁止位置とで各突起部１３ｃ，１４ｃが嵌まり込むことによって表面側開閉部材１３と裏面側開閉部材１４とはそれぞれその位置を保持するように構成されている。
【００２１】
又、表面側開閉部材１３と裏面側開閉部材１４とにはそれぞれ操作部１３ｄ，１４ｄがケース３の背面３ｄ側に突出して設けられ、この双方の操作部１３ｄ，１４ｄは上下に並んだ位置でケース３の背面３ｄに開口された操作用開口部２１より外部に共に露出されている。そして、双方の操作部１３ｄ，１４ｄにおける記録・消去可能位置と記録・消去禁止位置との操作位置が左右方向で同じ位置になるように設定されている。
【００２２】
次に、上記ディスクカートリッジ１の誤消去防止切換機構１０の作用を説明する。図２の記録・消去可能位置にあって、操作者が双方の操作部１３ｄ，１４ｄを共に例えば指で図２（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、表面側開閉部材１３と裏面側開閉部材１４が共にスライドして、各貫通孔１７，１８が検出孔１２，１１の位置に一致する記録・消去禁止位置（図３（Ａ），（Ｂ）の位置）に移動する。反対に、図３の記録・消去禁止位置にあって、操作者が双方の操作部１３ｄ，１４ｄを共に例えば指で図３（Ａ），（Ｂ）の矢印Ｍ方向に押圧すると、表面側開閉部材１３と裏面側開閉部材１４が共にスライドして、各閉塞部１３ａ，１４ａが各検出孔１２，１１を塞ぐ記録・消去可能位置（図２（Ａ），（Ｂ）の位置）に移動する。
【００２３】
又、図２の記録・消去可能位置にあって、操作者が下方の操作部１４ｄのみを例えば指で図２（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、裏面側開閉部材１４のみがスライドして貫通孔１８が検出孔１１の位置に一致する記録・消去禁止位置に移動し、図４に示すディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。反対に、図３の記録・消去禁止位置にあって、操作者が上方の操作部１３ｄのみを例えば指で図３（Ａ），（Ｂ）の矢印Ｍ方向に押圧すると、表面側開閉部材１３のみがスライドして閉塞部１３ａが検出孔１２を塞ぐ記録・消去可能位置に移動し、図４に示すディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。又、ディスクＡ面で記録・消去禁止、ディスクＢ面で記録・消去可能位置とする場合には上記と逆の操作を行えば良い。
【００２４】
以上より、表面側開閉部材１３及び裏面側開閉部材１４は、双方の操作部１３ｄ，１４ｄを同時に操作できるため、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、又、各操作部１３ｄ，１４ｄを別々に操作できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、第１としてディスク両面に跨がって長時間（大量）の情報を記録した場合には、両面の検出孔１１，１２を一操作で同時に記録・消去禁止に切り換えできること、第２としてディスク両面に同時記録するシステムに使用する場合には、両面の検出孔１１，１２を一操作で同時に記録・消去禁止に切り換えできること、第３として安全を期するため、記録・消去禁止に切り換えるときには、両面の検出孔１１，１２を一操作で同時に切り換え、記録済みの情報を消去したり書き換えたりするときには、記録・消去可能状態に片面ずつ確かめながら切り換えできること、第４として、片面ずつ別々に記録・消去禁止状態と記録・消去可能状態とに切り換えできることの４つの要求全てに対応できる。
【００２５】
図５及び図６は本発明の第２実施形態を示し、図５はディスクカートリッジ１Ａの斜視図、図６（Ａ）は誤消去防止切換機構１０Ａが記録・消去可能位置であるディスクカートリッジの横断面図、図６（Ｂ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの縦断面図である。
【００２６】
図５及び図６において、この第２実施形態にあって前記第１実施形態と比較して同一構成箇所については図面に同一符号を付してその説明を省略し、異なる構成箇所のみを説明する。
【００２７】
即ち、ケース３の背面３ｄに開口された操作用開口部２１Ａは、ケース３の表面３ａと裏面３ｂにまで延びて開口されており、この表面３ａと裏面３ｂの各開口箇所にまで各操作部１３ｄ，１４ｄの一端側が延設されている。つまり上方に位置する表面側開閉部材１３の操作部１３ｄは上方に延設され、その上面はケース３の上面３ａとほぼ同一面とされている。下方に位置する裏面側開閉部材１４の操作部１４ｄは下方に延設され、その下面はケース３の下面３ｂとほぼ同一面とされている。
【００２８】
この第２実施形態においても前記第１実施形態と同様に、双方の操作部１３ｄ，１４ｄを同時に操作できるため、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、又、各操作部１３ｄ，１４ｄを別々に操作できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。
【００２９】
その上、この第２実施形態ではディスクカートリッジ１Ａの厚さが薄く設定されても、操作するのに十分な幅の操作部１３ｄ，１４ｄを確保できる。又、ケース３の表面３ａ側から操作部１３ｄを、ケース３の裏面３ｂ側から操作部１４ｄをそれぞれ操作できるため、各操作部１３ｄ，１４ｄを別々に操作する場合の操作が確実になり、又、操作自由度が広がる。
【００３０】
図７〜図１２は本発明の第３実施形態を示し、図７はディスクカートリッジの斜視図、図８（Ａ）は誤消去防止切換機構が両面共に記録・消去可能位置であるディスクカートリッジの横断面図、図８（Ｂ）は誤消去防止切換機構が両面共に記録・消去可能位置であるディスクカートリッジの縦断面図、図９は共通開閉部材と表面側開閉部材及び裏面側開閉部材との拡大斜視図、図１０（Ａ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの横断面図、図１０（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの縦断面図、図１０（Ｃ）は共通開閉部材が共通記録・消去可能位置であるディスクカートリッジの横断面図、図１０（Ｄ）は共通開閉部材が共通記録・消去可能位置であるディスクカートリッジの縦断面図、図１１（Ａ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの横断面図、図１１（Ｂ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの縦断面図、図１１（Ｃ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの横断面図、図１１（Ｄ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの縦断面図、図１２（Ａ）は共通開閉部材が中立位置で、表面側開閉部材が記録・消去可能位置（ディスクＡ面で記録・消去可能）、裏面側開閉部材が記録・消去禁止位置（ディスクＢ面で記録・消去禁止）であるディスクカートリッジの横断面図、図１２（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材が記録・消去可能位置（ディスクＡ面で記録・消去可能）、裏面側開閉部材が記録・消去禁止位置（ディスクＢ面で記録・消去禁止）であるディスクカートリッジの縦断面図である。
【００３１】
図７〜図１２において、この第３実施形態のディスクカートリッジ１Ｂにあって前記第１実施形態のディスクカートリッジ１と比較して誤消去防止切換機構の構成のみが異なり、他の構成箇所は同一であり、同一構成箇所については図面に同一符号を付してその説明を省略し、異なる構成箇所のみを説明する。
【００３２】
即ち、誤消去防止切換機構１０Ｂは、ケース３の表面３ａと裏面３ｂとにそれぞれ開口する検出孔１１，１２を有する。ケース３の表面３ａの検出孔１１はディスク２の裏面（Ｂ面）用であり、ケース３の裏面３ｂの検出孔１２はディスク２の表面（Ａ面）用である。そして、検出孔１２は短尺状の表面側開閉部材３０によって開閉され、検出孔１１は短尺状の裏面側開閉部材３１とによって開閉される。表面側開閉部材３０と裏面側開閉部材３１は、ケース３の背面壁１５に近接して平行に配置された内側壁部３２とこの内側壁部３２より更に奥の位置で平行に配置された左右位置の最内側壁部３３との間のスライドスペースで左右方向にスライド自在に配置されている。
【００３３】
表面側開閉部材３０と裏面側開閉部材３１の各検出孔１２，１１に対応する面には孔３４，３５がそれぞれ形成されている。この各孔３４，３５が検出孔１１，１２の位置に一致する記録・消去禁止位置（図１１（Ａ）〜（Ｄ）の位置）と、各孔３４，３５が検出孔１１，１２の位置に一致せずに各検出孔１１，１２を塞ぐ記録・消去可能位置（図１０（Ａ）〜（Ｄ）の位置）との間で、表面側開閉部材３０と裏面側開閉部材３１とが別々にスライド自在となっている。表面側開閉部材３０と裏面側開閉部材３１には弾性部３０ｂ，３１ｂを介して突起部３０ｃ，３１ｃがそれぞれ設けられている。左右位置の各最内側壁部３３には各突起部３０ｃ，３１ｃが嵌まり込む凹部３６，３７がそれぞれ２カ所設けられており、記録・消去可能位置と記録・消去禁止位置とで各突起部３０ｃ，３１ｃが嵌まり込むことによって表面側開閉部材３０と裏面側開閉部材３１とはそれぞれその位置を保持するように構成されている。
【００３４】
又、表面側開閉部材３０と裏面側開閉部材３１の各検出孔１２，１１に対応しない反対面にはそれぞれ操作部３０ｄ，３１ｄが突出して設けられ、この双方の操作部３０ｄ，３１ｄはケース３の表面３ａと裏面３ｂに開口された操作用開口部３８，３９よりそれぞれ外部に露出されている。そして、各操作部３０ｄ，３１ｄを操作することによって表面側開閉部材３０と裏面側開閉部材３１とを記録・消去可能位置と記録・消去禁止位置との間を別個独立にスライド移動させることができる。
【００３５】
また、誤消去防止切換機構１０Ｂにはケース３の幅寸法より少し短い程度の長尺状の共通開閉部材４０が設けられ、この共通開閉部材４０はケース３の背面壁１５とこの背面壁１５に近接して平行に配置された内側壁部３２との間のスライドスペースで左右方向にスライド自在に配置されている。共通開閉部材４０の左右方向の略中央位置には共通操作部４０ａがケース３の背面３ｄ側に突出して設けられ、この共通操作部４０ａはケース３の背面３ｄ側に開口された操作用開口部４１より外部に露出されている。そして、共通操作部４０ａを操作することによって共通開閉部材４０を中立位置（図８（Ａ），（Ｂ）の位置）を中間として一方側（図８（Ａ），（Ｂ）のＭ方向）の共通記録・消去可能位置（図１０（Ｃ），（Ｄ）の位置）と他方側（図８（Ａ），（Ｂ）のＮ方向）の共通記録・消去禁止位置（図１１（Ａ），（Ｂ）の位置）との間でスライド移動させることができる。
【００３６】
又、共通開閉部材４０の左右の両側には一定の間隔を置いて配置された外押圧部４０ｂ，４０ｃ及び内押圧部４０ｄ，４０ｅの組がそれぞれ左右対称に設けられており、この外押圧部４０ｂ，４０ｃ及び内押圧部４０ｄ，４０ｅは内側壁部３２の切欠部（特に符号を付けず）より前記表面側開閉部材３０と前記裏面側開閉部材３１とがそれぞれスライドするスライドスペースに延びている。外押圧部４０ｂと内押圧部４０ｄとの間に表面側開閉部材３０が、外押圧部４０ｃと内押圧部４０ｅとの間裏面側開閉部材３１が記録・消去可能位置と記録・禁止位置とをスライド可能にそれぞれ配置されている。
【００３７】
そして、共通開閉部材４０の中立位置（図８（Ａ），（Ｂ）の位置）では、表面側開閉部材３０及び裏面側開閉部材３１の記録・消去可能位置と記録・消去禁止位置間の移動を共に許容する。共通開閉部材４０が中立位置から共通記録・消去可能位置にスライド移動されると、表面側開閉部材３０及び裏面側開閉部材３１が記録・消去可能位置に位置しないときには内押圧部４０ｄ及び外押圧部４０ｃが表面側開閉部材３０及び裏面側開閉部材３１を押圧して共に記録・消去可能位置に強制的に位置させる。共通開閉部材４０が中立位置から共通記録・消去禁止位置にスライド移動されると、表面側開閉部材３０及び裏面側開閉部材３１が記録・消去禁止位置に位置しないときには外押圧部４０ｂ及び内押圧部４０ｅが表面側開閉部材３０及び裏面側開閉部材３１を押圧して共に記録・消去禁止位置に強制的に位置させる。つまり、共通開閉部材４０の中立位置から共通記録・消去可能位置への移動によって表面側開閉部材３０及び裏面側開閉部材３１が共に記録・消去可能位置に位置され、共通開閉部材４０の中立位置から共通記録・消去禁止位置への移動によって表面側開閉部材３０及び裏面側開閉部材３１を共に記録・消去禁止位置に位置される。
【００３８】
又、ケース３内の背面側の両側端部にはバネ保持部４２，４２がそれぞれ固定され、この各バネ保持部４２，４２には捩じりコイルバネ４３，４４がそれぞれ装着されている。この各捩じりコイルバネ４３，４４の一方の腕部の先端（特に、符号を付さず）はケース３に固定され、他方の腕部（特に、符号を付さず）は共通開閉部材４０の両側の外押圧部４０ｂ，４０ｃの各外面側にそれぞれ配置されていると共に最内側壁部３３のストッパ部４５（図１０（Ｃ），図１１（Ａ）に示す）によってバネ作用領域が規制されている。つまり、共通開閉部材４０が中立位置から共通記録・消去禁止位置又は共通記録・消去可能位置にスライド移動すると、スライド移動とは反対側の捩じりコイルバネ４３，４４の撓みがストッパ部４５で規制され、スライド移動側の捩じりコイルバネ４４，４３のみがバネエネルギーを蓄える方向に撓んで共通開閉部材４０を中立位置に戻す方向に付勢する。従って、共通開閉部材４０は操作者が共通操作部４０ａを操作して共通記録・消去禁止位置又は共通記録・消去可能位置にスライド移動させるときのみ中立位置以外の位置に位置するが、操作者が操作を終了して共通操作部４０ａより手を離すと直ちに中立位置に戻る。
【００３９】
次に、上記ディスクカートリッジ１Ｂの誤消去防止切換機構１０Ｂの作用を説明する。図１０（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が共通操作部４０ａを例えば指で図１０（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、表面側開閉部材３０と裏面側開閉部材３１が共にスライドして各孔３４，３５が検出孔１２，１１の位置に一致する記録・消去禁止位置（図１１（Ａ）、（Ｂ）の位置）に移動する。そして、操作者が共通操作部４０ａより指を離すと、捩じりコイルバネ４４のバネ復帰力によって共通開閉部材４０が中立位置に戻る（図１１（Ｃ），（Ｄ）の位置）。反対に、図１１（Ｃ），（Ｄ）の記録・消去禁止位置にあって、操作者が共通操作部４０ａを共に例えば指で図１１（Ｃ），（Ｄ）の矢印Ｍ方向に押圧すると、表面側開閉部材３０と裏面側開閉部材３１が共にスライドして各検出孔１２，１１を塞ぐ記録・消去可能位置（図１０（Ｃ），（Ｄ）の位置）に移動する。そして、操作者が共通操作部４０ａより指を離すと、捩じりコイルバネ４３のバネ復帰力によって共通開閉部材４０が中立位置に戻る（図１０（Ａ），（Ｂ）の位置）。
【００４０】
又、図１０（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が裏面側開閉部材３１の操作部３１ｄを例えば指で図１０（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、裏面側開閉部材３１のみがスライドして孔３５が検出孔１１の位置に一致する記録・消去禁止位置に移動し、図１２（Ａ），（Ｂ）に示すように、ディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。図１０（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が表面側開閉部材３０の操作部３０ｄを例えば指で図１０（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、表面側開閉部材３０のみがスライドして孔３４が検出孔１２の位置に一致する記録・消去禁止位置に移動し、図示しないが、ディスクＡ面で記録・消去禁止、ディスクＢ面で記録・消去可能位置となる。
【００４１】
又、図１１（Ｃ），（Ｄ）の両面共に記録・消去禁止位置にあって、操作者が裏面側開閉部材３１の操作部３１ｄを例えば指で図１１（Ｃ），（Ｄ）の矢印Ｍ方向に押圧すると、裏面側開閉部材３１のみがスライドして孔３５が検出孔１１の位置に一致しない記録・消去可能位置に移動し、図示しないが、ディスクＡ面で記録・消去禁止、ディスクＢ面で記録・消去可能位置となる。図１１（Ｃ），（Ｄ）の両面共に記録・消去禁止位置にあって、操作者が表面側開閉部材３０の操作部３０ｄを例えば指で図１１（Ｃ），（Ｄ）の矢印Ｍ方向に押圧すると、表面側開閉部材３０のみがスライドして孔３４が検出孔１２の位置に一致しない記録・消去可能位置に移動し、図１２（Ａ），（Ｂ）に示すように、ディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。
【００４２】
以上より、共通開閉部材４０の共通操作部４０ａを操作することで表面側開閉部材３０及び裏面側開閉部材３１が共に記録・消去禁止位置又は記録・消去可能位置になるため、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、又、共通開閉部材４０の中立位置では、表面側開閉部材３０及び裏面側開閉部材３１の各操作部３０ｄ，３１ｄを操作することで別々に記録・消去禁止位置と記録・消去可能位置間を移動できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、請求項１の発明と同様に４つの要求全てに対応できる。
【００４３】
図１３〜図１５は本発明の第４実施形態を示し、図１３は共通開閉部材と表面側開閉部材及び裏面側開閉部材との拡大斜視図、図１４（Ａ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの横断面図、図１４（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの縦断面図、図１５（Ａ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの横断面図、図１５（Ｂ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの縦断面図、図１５（Ｃ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの横断面図、図１５（Ｄ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【００４４】
図１３〜図１５において、この第４実施形態のディスクカートリッジ１Ｃと第３実施形態のディスクカートリッジ１Ｂとを比較して同一構成箇所については図面に同一符号を付してその説明を省略し、異なる構成箇所のみを説明する。
【００４５】
即ち、誤消去防止切換機構１０Ｃの共通開閉部材４６は、中立位置（図１４（Ａ），（Ｂ）の位置、図１５（Ｃ），（Ｄ）の位置）と記録・消去禁止位置（図１５（Ａ），（Ｂ）の位置）との間でのみスライド移動するように構成されている。又、捩じりコイルバネ４４は、共通開閉部材４６を記録・消去禁止位置から中立位置に戻すときのみ必要であるため、一方にのみ設けられている。又、共通開閉部材４６は、第３実施形態の共通開閉部材４０を一部変形したものであり、４０ａ，４０ｂ，４０ｃ，４０ｅと対応して４６ａ，４６ｂ，４６ｃ，４６ｅが同様の形状で形成されているものの、共通開閉部材４６によって表面側開閉部材３０及び裏面側開閉部材３１を強制的に記録・消去可能位置に位置させないため、共通開閉部材４６の一方の内押圧部（第３実施形態の４０ｄに相当）が削除されている。但し、共通開閉部材４６の外押圧部４０ｃは、捩じりコイルバネ４４のバネ押圧部として残されている。
【００４６】
次に、上記ディスクカートリッジ１Ｃの誤消去防止切換機構１０Ｃの作用を説明する。図１４（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が共通開閉部材４６の共通操作部４６ａを例えば指で図１４（Ａ），（Ｂ）のＮ矢印方向に押圧すると、表面側開閉部材３０と裏面側開閉部材３１が共にスライドして各孔３４，３５が検出孔１２，１１の位置に一致する記録・消去禁止位置（図１５（Ａ），（Ｂ）の位置）に移動する。そして、操作者が共通操作部４６ａより指を離すと、捩じりコイルバネ４４のバネ復帰力によって共通開閉部材４６が中立位置に戻る（図１５（Ｃ），（Ｄ）の位置）。但し、この反対に、図１５（Ｃ），（Ｄ）の両面共に記録・消去禁止位置にあって、共通開閉部材４６の共通操作部４６ａを操作して一操作で両面共に記録・消去可能位置に同時に切り換え操作することはできない。
【００４７】
又、図１４（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が裏面側開閉部材３１の操作部３１ｄを例えば指で図１４（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、裏面側開閉部材３１のみがスライドして孔３５が検出孔１１の位置に一致する記録・消去禁止位置に移動し、図示しないが、ディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。図１４（Ａ），（Ｂ）の両面共に記録・消去可能位置にあって、操作者が表面側開閉部材３０の操作部３０ｄを例えば指で図１４（Ａ），（Ｂ）の矢印Ｎ方向に押圧すると、表面側開閉部材３０のみがスライドして孔３４が検出孔１２の位置に一致する記録・消去禁止位置に移動し、図示しないが、ディスクＡ面で記録・消去禁止、ディスクＢ面で記録・消去可能位置となる。
【００４８】
又、図１５（Ｃ），（Ｄ）の両面共に記録・消去禁止位置にあって、操作者が裏面側開閉部材３１の操作部３１ｄを例えば指で図１５（Ｃ），（Ｄ）の矢印Ｍ方向に押圧すると、裏面側開閉部材３１のみがスライドして孔３５が検出孔１１の位置に一致しない記録・消去可能位置に移動し、図示しないが、ディスクＡ面で記録・消去禁止、ディスクＢ面で記録・消去可能位置となる。図１５（Ｃ），（Ｄ）の両面共に記録・消去禁止位置にあって、操作者が表面側開閉部材３０の操作部３０ｄを例えば指で図１５（Ｃ），（Ｄ）の矢印Ｍ方向に押圧すると、表面側開閉部材３０のみがスライドして孔３４が検出孔１２の位置に一致しない記録・消去可能位置に移動し、図示しないが、ディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置となる。
【００４９】
以上より、共通開閉部材４６の共通操作部４６ａを操作することで表面側開閉部材３０及び裏面側開閉部材３１が共に記録・消去禁止位置になるため、両面を同じ記録・消去禁止状態に一操作で同時に切り換え操作でき、又、共通開閉部材４６の中立位置では、表面側開閉部材３０及び裏面側開閉部材３１の各操作部３０ｄ，３１ｄを操作することで別々に記録・消去禁止位置と記録・消去可能位置間を移動できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、請求項１の発明と同様に４つの要求全てに対応できる。その上、共通開閉部材４６の共通操作部４６ａを操作することで表面側開閉部材３０及び裏面側開閉部材３１を共に記録・消去可能位置にすることができないため、両面を同じ記録・消去可能状態に一操作で同時に切り換え操作できず、記録済みの情報を消去したり書き換えたりするときにはより安全性を期することができる。
【００５０】
尚、前記第１及び第２実施形態によれば、表面側開閉部材１３と裏面側開閉部材１４との各閉塞部１３ａ，１４ａの貫通孔１７，１８は貫通した孔として構成したが、検出孔１２，１１と反対側が閉塞された孔として構成しても良く、又、その部分を切欠部として構成しても良く、又、その部分に部材が存在しないように閉塞部１３ａ，１４ａの形状を構成しても良い。又、第３，第４実施形態では、検出孔と反対側が閉塞された孔３４，３５として構成したが、貫通孔や切欠部等として構成しても良い。
【００５１】
また、前記各実施形態によれば、操作用開口部２１，２１Ａ，２１Ｂ，２１Ｃは、ケース３の背面３ｄの左右中央位置に配置したが中央より左右にずれた位置に配置しても良い。
【００５２】
尚、前記した各実施形態では、ディスク２の表面（Ａ面）を下にしてケース３に収納する方式について記述したが、ディスク２の表面（Ａ面）を上にしてケース３に収納する方式も可能である。
【００５３】
【発明の効果】
以上説明したように、請求項１の発明によれば、両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は上下に並んだ位置で前記ケースの背面に開口された操作用開口部より外部に共に露出され、前記双方の操作部における記録・消去可能位置と記録・消去禁止位置とになる操作位置が左右方向で同じ位置に設定されたので、双方の操作部を同時に操作できるため、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、又、各操作部を別々に操作できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、第１としてディスク両面に跨がって長時間（大量）の情報を記録した場合には、両面の検出孔を一操作で同時に記録・消去禁止に切り換えできること、第２としてディスク両面に同時記録するシステムに使用する場合には、両面の検出孔を一操作で同時に記録・消去禁止に切り換えできること、第３として安全を期するため、記録・消去禁止に切り換えるときには、両面の検出孔を一操作で同時に切り換え、記録済みの情報を消去したり書き換えたりするときには、記録・消去可能状態に片面ずつ確かめながら切り換えできること、第４として、片面ずつ別々に記録・消去禁止状態と記録・消去可能状態とに切り換えできることの４つの要求全てに対応できる。
【００５４】
請求項２の発明によれば、前記請求項１に記載のディスクカートリッジにおいて、前記操作用開口部は、前記ケースの表面と裏面にまで延びて開口され、この表面と裏面の各開口箇所にまで前記各操作部の一端側が延設されているので、請求項１の発明の効果に加え、ディスクカートリッジの厚さが薄く設定されても、操作するのに十分な幅の操作部を構成できる。又、ケースの表面側から一方の操作部を、ケースの裏面側から他方の操作部をそれぞれ操作できるため、各操作部を別々に操作する場合の操作が確実になり、又、操作自由度が広がる。
【００５５】
請求項３の発明によれば、表裏両面からディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの裏面及び表面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置を中間として一方側の共通記録・消去可能位置と他方側の共通記録・消去禁止位置との間で移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去可能位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去可能位置に位置させ、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させるよう構成したので、共通開閉部材の共通操作部を操作することで表面側開閉部材及び裏面側開閉部材が共に記録・消去禁止位置又は記録・消去可能位置になるため、両面を同じ記録・消去禁止状態又は記録・消去可能状態に一操作で同時に切り換え操作でき、又、共通開閉部材の中立位置では、表面側開閉部材及び裏面側開閉部材の各操作部を操作することで別々に記録・消去禁止位置と記録・消去可能位置間を移動できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、請求項１の発明と同様に４つの要求全てに対応できる。
【００５６】
請求項４の発明によれば、表裏両面からディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの表面及び裏面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置と共通記録・消去禁止位置との間でのみ移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させるよう構成したので、共通開閉部材の共通操作部を操作することで表面側開閉部材及び裏面側開閉部材が共に記録・消去禁止位置になるため、両面を同じ記録・消去禁止状態に一操作で同時に切り換え操作でき、又、共通開閉部材の中立位置では、表面側開閉部材及び裏面側開閉部材の各操作部を操作することで別々に記録・消去禁止位置と記録・消去可能位置間を移動できるため、片面ずつ別々に記録・消去禁止状態又は記録・消去可能状態に切り換え操作できる。従って、請求項１の発明と同様に４つの要求全てに対応できる。その上、共通開閉部材の共通操作部を操作することで表面側開閉部材及び前記裏面側開閉部材を共に記録・消去可能位置にすることができないため、両面を同じ記録・消去可能状態に一操作で同時に切り換え操作できず、記録済みの情報を消去したり書き換えたりするときにはより安全性を期することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示し、ディスクカートリッジの斜視図である。
【図２】本発明の第１実施形態を示し、（Ａ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの横断面図、（Ｂ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの縦断面図、（Ｃ）は同誤消去防止切換機構を構成する表面側開閉部材と裏面側開閉部材の拡大斜視図である。
【図３】本発明の第１実施形態を示し、（Ａ）は誤消去防止切換機構が記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｂ）は誤消去防止切換機構が記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【図４】本発明の第１実施形態を示し、（Ａ）は誤消去防止切換機構がディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｂ）は誤消去防止切換機構がディスクＡ面で記録・消去可能、ディスクＢ面で記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【図５】本発明の第２実施形態を示し、ディスクカートリッジの斜視図である。
【図６】本発明の第２実施形態を示し、（Ａ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの横断面図、（Ｂ）は誤消去防止切換機構が記録・消去可能位置であるディスクカートリッジの縦断面図である。
【図７】本発明の第３実施形態を示し、ディスクカートリッジの斜視図である。
【図８】本発明の第３実施形態を示し、（Ａ）は誤消去防止切換機構が両面共に記録・消去可能位置であるディスクカートリッジの横断面図、（Ｂ）は誤消去防止切換機構が両面共に記録・消去可能位置であるディスクカートリッジの縦断面図である。
【図９】本発明の第３実施形態を示し、共通開閉部材と表面側開閉部材及び裏面側開閉部材との拡大斜視図である。
【図１０】本発明の第３実施形態を示し、（Ａ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの横断面図、（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの縦断面図、（Ｃ）は共通開閉部材が共通記録・消去可能位置であるディスクカートリッジの横断面図、（Ｄ）は共通開閉部材が共通記録・消去可能位置であるディスクカートリッジの縦断面図である。
【図１１】本発明の第３実施形態を示し、（Ａ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｂ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの縦断面図、（Ｃ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｄ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【図１２】本発明の第３実施形態を示し、（Ａ）は共通開閉部材が中立位置で、表面側開閉部材が記録・消去可能位置（ディスクＡ面で記録・消去可能）、裏面側開閉部材が記録・消去禁止位置（ディスクＢ面で記録・消去禁止）であるディスクカートリッジの横断面図、（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材が記録・消去可能位置（ディスクＡ面で記録・消去可能）、裏面側開閉部材が記録・消去禁止位置（ディスクＢ面で記録・消去禁止）であるディスクカートリッジの縦断面図である。
【図１３】本発明の第４実施形態を示し、共通開閉部材と表面側開閉部材及び裏面側開閉部材との拡大斜視図である。
【図１４】本発明の第４実施形態を示し、（Ａ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの横断面図、（Ｂ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去可能位置であるディスクカートリッジの縦断面図である。
【図１５】本発明の第４実施形態を示し、（Ａ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｂ）は共通開閉部材が共通記録・消去禁止位置であるディスクカートリッジの縦断面図、（Ｃ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの横断面図、（Ｄ）は共通開閉部材が中立位置で、表面側開閉部材及び裏面側開閉部材が記録・消去禁止位置であるディスクカートリッジの縦断面図である。
【図１６】従来例（第２従来例）のディスクカートリッジの斜視図である。
【図１７】従来例（第２従来例）のディスクカートリッジの誤消去防止切換機構を示す一部分解斜視図である。
【符号の説明】
１，１Ａ，１Ｂ，１Ｃディスクカートリッジ
２ディスク
３ケース
３ａ表面
３ｂ裏面
３ｄ背面
１０，１０Ａ，１０Ｂ，１０Ｃ誤消去防止切換機構
１１，１２検出孔
１３，３０表面側開閉部材
１３ｄ，３０ｄ操作部
１４，３１裏面側開閉部材
１４ｄ，３１ｄ操作部
２１，２１Ａ，３８，３９，４１操作用開口部
４０，４６共通開閉部材
４０ａ，４６ａ共通操作部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge in which a double-sided disk is housed in a case, and relates to an erroneous erasure prevention switching mechanism.
[0002]
[Prior art]
Conventionally, optical discs, magnetic discs, and the like have been used in the form of cartridges in which discs are housed in cases in order to prevent dust, dirt, scratches, and dirt and to ensure the reliability of recording and reproduction. In this case, an erroneous erasure prevention switching mechanism is provided so that information recorded on the disk is not accidentally erased or rewritten. In recent years, as the recording capacity required for a disk increases, a double-sided disk for recording on both sides of the disk is used. This double-sided disk cartridge is also provided with an erroneous erasure prevention switching mechanism for protecting information recorded on the disk.
[0003]
As a first conventional example of such an erroneous erasure prevention switching mechanism, there are provided detection holes for detecting whether recording or erasure is possible on the front surface and the back surface of the case, respectively, and each detection hole is opened and closed separately. An opening / closing member and a back-side opening / closing member are provided. And the detection hole of both surfaces can be opened and closed separately by operating this surface side opening and closing member and back side opening and closing member separately.
[0004]
A second conventional example is disclosed in Japanese Patent Laid-Open No. 7-272392 shown in FIGS. 16 and 17, detection holes 51 and 52 for detecting whether recording or erasure can be performed are provided on the front and back surfaces of the case 50, respectively, and a single opening / closing member capable of opening and closing each of the detection holes 51 and 52 is provided. 53 is slidably provided in the case 50. The operation portion 53 a of the opening / closing member 53 is exposed from the opening 54 on the back surface of the case 50. By operating the operation portion 53a, the opening / closing member 53 slides to open and close the detection holes 51 and 52 on both sides at the same time. That is, the detection holes 51 and 52 on both sides are both closed or opened.
[0005]
Incidentally, the erroneous erasure prevention switching mechanism has the following requirements. First, when a long time (a large amount) of information is recorded across both sides of the disc, the detection holes on both sides can be simultaneously switched to prohibit recording / erasing by one operation. Secondly, when used in a system for simultaneous recording on both sides of a disc, the detection holes on both sides can be simultaneously switched to recording / erasing inhibition by one operation. Third, for safety reasons, when switching to recording / erasing prohibition, the detection holes on both sides are switched simultaneously in one operation, and when erasing or rewriting recorded information, make sure that each side is in a recordable / erasable state. It can be switched while. The fourth is, of course, that each side can be switched separately between a recording / erasing prohibited state and a recording / erasable state.
[0006]
[Problems to be solved by the invention]
However, in the first conventional example, the detection holes on both sides cannot be opened and closed by one operation, and therefore the first to third requirements cannot be met. In the second conventional example, the detection holes on both sides can be opened and closed by a single operation, but the detection holes on both sides can only be opened and closed in the same manner, so the third and fourth requirements cannot be met.
[0007]
Therefore, the present invention has been made to solve the above-described problems, and in order to satisfy the first to fourth requirements, both surfaces are simultaneously set to the same recording / erasing prohibited state or recording / erasable state by one operation. It is an object of the present invention to provide a disc cartridge provided with an erroneous erasure prevention switching mechanism which can be switched and can be switched to a recording / erasing prohibited state or a recording / erasable state separately for each side.
[0008]
In addition, in order to satisfy the above first to fourth requirements, the present invention can simultaneously switch both surfaces to the same recording / erasing prohibited state by one operation, and separately record / erase prohibited state or recording / erasing each side. An object of the present invention is to provide a disc cartridge having an erroneous erasure prevention switching mechanism which can be switched to a possible state and cannot be simultaneously switched to both the same recordable / erasable states by one operation.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a case in which a disc that can be recorded on both sides is rotatably housed, and recording or erasing can be performed on the disc from both the front and back sides, and a detection hole that opens on each of the front and back surfaces of the case And an erroneous erasure prevention switching mechanism in which the front side opening / closing member and the back side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes on both sides, respectively. The front-side opening / closing member and the back-side opening / closing member each have an operation portion, and both the operation portions are opened on the back surface of the case in a vertically aligned position. Further, the operation positions that are both exposed to the outside and become the recording / erasable position and the recording / erasure prohibiting position in the both operation units are set to the same position in the left-right direction.
[0010]
According to a second aspect of the present invention, in the disk cartridge according to the first aspect, the operation opening extends to the front and back surfaces of the case, and each of the opening portions on the front and back surfaces is opened. One end side of the operation portion is extended.
[0011]
The invention according to claim 3 is a case in which a disc that can be recorded on both sides is rotatably housed inside, and a case in which recording or erasing can be performed on the disc from both the front and back sides, and a detection hole that opens on each of the front and back sides of the case And an erroneous erasure prevention switching mechanism in which the front side opening / closing member and the back side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes on both sides, respectively. The front surface side opening / closing member and the back surface side opening / closing member each have an operation portion, and both the operation portions are disposed outside from the operation opening portions respectively opened on the front surface and the back surface of the case. The common erasure prevention switching mechanism is provided with a common opening / closing member having a common operation portion exposed to the outside from the operation opening portion opened on the back surface of the case. The common opening / closing member is provided movably between a common recording / erasable position on one side and a common recording / erasure prohibiting position on the other side with the neutral position in the middle. The opening / closing member and the back side opening / closing member are allowed to move between the recordable / erasable position and the recording / erasing prohibited position, respectively, and the front side opening / closing is performed by moving the neutral position from the neutral position to the common recording / erasable position. Both the member and the back side opening / closing member are positioned at a recordable / erasable position, and the front side opening / closing member and the backside opening / closing member are both recorded by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibited position. -It is characterized by being positioned at an erasure prohibition position.
[0012]
The invention according to claim 4 is a case in which a disc that can be recorded on both sides is rotatably accommodated inside, a case that allows recording or erasing to the disc from both the front and back sides, and a detection hole that opens on each of the front and back sides of the case And an erroneous erasure prevention switching mechanism in which the front side opening / closing member and the back side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes on both sides, respectively. The front surface side opening / closing member and the back surface side opening / closing member each have an operation portion, and both the operation portions are located outside the operation opening portions respectively opened on the back surface and the front surface of the case. The common erasure prevention switching mechanism is provided with a common opening / closing member having a common operation portion exposed to the outside from the operation opening portion opened on the back surface of the case. The common opening / closing member is provided so as to be movable only between a neutral position and a common recording / erasing prohibiting position, and at the neutral position of the common opening / closing member, the recordable / erasable positions of the front-side opening / closing member and the back-side opening / closing member are provided. And the recording / erasing prohibiting position, and the front opening / closing member and the back opening / closing member are both recorded / erasing prohibited by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibiting position. It is located in.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 to 4 show a first embodiment of the present invention, FIG. 1 is a perspective view of a disk cartridge, and FIG. 2A is a cross-sectional view of a disk cartridge in which an erroneous erasure prevention switching mechanism is in a recordable / erasable position. 2B is a longitudinal sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism is at a recording / erasable position, FIG. 2C is an enlarged perspective view of the front surface side opening / closing member and the back surface side opening / closing member, and FIG. FIG. 3A is a cross-sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism is at the recording / erasure prohibiting position, and FIG. 3B is a longitudinal sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism is at the recording / erasing prohibiting position. 4A is a cross-sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism can record / erase on the disk A surface, and the recording / erasure prohibited position on the disk B surface. FIG. 4B shows the erroneous erasure prevention switching mechanism. Recording on disc A side Erasable, it is a longitudinal sectional view of the disk cartridge as a recording and erasing forbidden location on the disk B plane.
[0015]
In FIG. 1, the disk cartridge 1 is mainly composed of a disk 2, a case 3 having a square shape for housing the disk 2, and a shutter 4 attached to the case 3.
[0016]
The disc 2 is a double-sided disc having both sides configured as a recording / reproducing surface, and is usually housed in the case 3 with the surface (side A) facing down.
[0017]
The case 3 is joined in a state where the lower case member (particularly not labeled) and the upper case member (particularly not designated) are abutted at each other's joint surface, and the front surface 3a and the rear surface 3b of the case 3 are joined. Openings 5 are respectively opened in and. The opening 5 has a head opening for inserting a head (pickup) for recording / reproducing information by accessing the disk 2 and a drive for inserting a drive shaft (turntable) for rotating the disk 2. And an opening. The front surface 3a and the back surface 3b of the case 3 are provided in the same shape except for identification marks (not shown) representing the front and back surfaces, and are configured to be used from both the front surface 3a and the back surface 3b. Yes.
[0018]
The shutter 4 connects an upper surface portion (not particularly denoted by reference numerals) that contacts the front surface 3a of the case 3 and a lower surface portion (not particularly denoted by reference numerals) that contacts the back surface 3b of the case 3 to connect the case 4 to the case 3 3 between the closed position (the position in FIG. 1) that closes the opening 5 and the open position that releases the opening 5. It is slidable in both directions. A pair of springs (not shown) are hooked on both sides of the shutter 4 and are urged toward the closed position by the pair of springs.
[0019]
Further, the disk cartridge 1 is provided with an erroneous erasure prevention switching mechanism 10. As shown in FIGS. 2 to 4, the erroneous erasure prevention switching mechanism 10 includes detection holes 11 and 12 that open on the front surface 3 a and the back surface 3 b of the case 3, respectively. The detection hole 11 on the front surface 3 a of the case 3 is for the back surface (B surface) of the disk 2, and the detection hole 12 on the back surface 3 b of the case 3 is for the front surface (A surface) of the disk 2. The detection hole 12 is opened / closed by a front surface side opening / closing member 13, and the detection hole 11 is opened / closed by a back surface side opening / closing member 14. Further, the front-side opening / closing member 13 and the back-side opening / closing member 14 slide in the left-right direction in a sliding space between the back wall 15 of the case 3 and the inner wall portion 16 disposed in parallel near the back wall 15. Arranged freely. The front-side opening / closing member 13 has a closed portion 13a having a thickness substantially the same as that of the slide space on one end side, and the portion other than the closed portion 13a is disposed at an upper position with a thickness approximately half of the slide space. The back surface side opening / closing member 14 has a closed portion 14a having a thickness substantially the same as that of the slide space at one end thereof, and the portion other than the closed portion 14a is disposed at a lower position with a thickness approximately half of the slide space.
[0020]
Through holes 17 and 18 are formed in the closed portions 13a and 14a of the front surface side opening and closing member 13 and the back surface side opening and closing member 14, respectively. The recording / erasure prohibiting position (the positions shown in FIGS. 3A and 3B) where the through holes 17 and 18 coincide with the positions of the detection holes 12 and 11, and the through holes 17 and 18 are the detection holes 12 and 11. The surface side opening / closing member 13 between the recording / erasable positions (positions in FIGS. 2A and 2B) where the closed portions 13a and 14a close the detection holes 12 and 11 without matching the positions of And the back-side opening / closing member 14 are slidable separately. Protrusions 13c and 14c are provided on the other end sides of the front-side opening / closing member 13 and the back-side opening / closing member 14 via elastic portions 13b and 14b, respectively. Two recesses 19 and 20 into which the protrusions 13c and 14c are fitted are provided at the left and right positions of the inner wall portion 16, and the protrusions 13c and 13c are respectively provided at a recording / erasable position and a recording / erasure prohibiting position. The front-side opening / closing member 13 and the back-side opening / closing member 14 are configured to hold their positions by fitting the 14c.
[0021]
Further, the front-side opening / closing member 13 and the back-side opening / closing member 14 are provided with operation portions 13d and 14d projecting toward the back surface 3d side of the case 3, respectively, and both the operation portions 13d and 14d are arranged in a vertically aligned position. Both are exposed to the outside through the opening 21 for operation opened in the back surface 3d of the case 3. The operation positions of the recordable / erasable position and the recordable / erasable prohibited position in both the operation units 13d and 14d are set to be the same in the left-right direction.
[0022]
Next, the operation of the erroneous erasure prevention switching mechanism 10 of the disk cartridge 1 will be described. When the operator presses both the operation portions 13d and 14d with the finger in the direction of the arrow N in FIGS. 2A and 2B at the recordable / erasable position in FIG. The back-side opening / closing member 14 slides together, and the through holes 17 and 18 move to the recording / erasure prohibiting positions (positions in FIGS. 3A and 3B) that coincide with the positions of the detection holes 12 and 11. On the other hand, when the operator is in the recording / erasing prohibition position in FIG. 3 and the operator presses both the operation portions 13d and 14d with, for example, a finger in the direction of the arrow M in FIGS. The member 13 and the back-side opening / closing member 14 slide together to move to the recordable / erasable positions (positions in FIGS. 2A and 2B) where the closed portions 13a and 14a close the detection holes 12 and 11, respectively. .
[0023]
When the operator presses only the lower operation portion 14d with the finger in the direction of arrow N in FIGS. 2A and 2B at the recordable / erasable position in FIG. Slides and the through hole 18 moves to a recording / erasure prohibiting position that coincides with the position of the detection hole 11, and becomes a recording / erasing prohibition position on the disk A surface shown in FIG. On the other hand, when the operator presses only the upper operation portion 13d with the finger in the direction of arrow M in FIGS. 3A and 3B at the recording / erasing prohibition position in FIG. Only the slide portion moves to a recordable / erasable position where the blocking portion 13a closes the detection hole 12, and recording / erasing is possible on the surface of the disk A shown in FIG. When recording / erasing is prohibited on the disk A surface and recording / erasing is possible on the disk B surface, the reverse operation is performed.
[0024]
As described above, since the front-side opening / closing member 13 and the back-side opening / closing member 14 can simultaneously operate both the operation units 13d and 14d, the both surfaces are simultaneously switched to the same recording / erasing prohibited state or recording / erasable state by one operation. In addition, since each of the operation units 13d and 14d can be operated separately, the operation can be switched to the recording / erasing prohibited state or the recording / erasable state separately for each side. Therefore, when a large amount of information is recorded across both sides of the disc as the first, the detection holes 11 and 12 on both sides can be simultaneously switched to recording / erasing prohibition by one operation, and second as the disc When used in a system that records on both sides simultaneously, the detection holes 11 and 12 on both sides can be simultaneously switched to recording / erasing prohibition in one operation. Third, for safety reasons, when switching to recording / erasing prohibition, When the detection holes 11 and 12 on both sides are simultaneously switched by one operation and the recorded information is erased or rewritten, it is possible to switch to the recordable / erasable state while confirming one side at a time. All four requirements for being able to switch between the erasure prohibited state and the recordable / erasable state can be met.
[0025]
5 and 6 show a second embodiment of the present invention. FIG. 5 is a perspective view of the disk cartridge 1A, and FIG. 6A is a crossing of the disk cartridge in which the erroneous erasure prevention switching mechanism 10A is at a recordable / erasable position. FIG. 6B is a longitudinal sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism is at the recording / erasable position.
[0026]
5 and 6, in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and only different components are described. .
[0027]
That is, the opening 21A for operation opened on the back surface 3d of the case 3 extends to the front surface 3a and the back surface 3b of the case 3, and each operation portion extends to each opening portion of the front surface 3a and the back surface 3b. One end side of 13d and 14d is extended. That is, the operation portion 13 d of the upper surface side opening / closing member 13 positioned above extends upward, and the upper surface thereof is substantially flush with the upper surface 3 a of the case 3. The operation portion 14 d of the lower surface side opening / closing member 14 positioned below extends downward, and its lower surface is substantially flush with the lower surface 3 b of the case 3.
[0028]
In the second embodiment, as in the first embodiment, both the operation units 13d and 14d can be operated at the same time, so that both sides can be simultaneously switched to the same recording / erasing prohibited state or recording / erasable state by one operation. In addition, since each of the operation units 13d and 14d can be operated separately, the operation can be switched to the recording / erasing prohibited state or the recording / erasable state separately for each side.
[0029]
In addition, in this second embodiment, even if the thickness of the disk cartridge 1A is set to be thin, it is possible to secure the operation portions 13d and 14d having a sufficient width for operation. In addition, since the operation unit 13d can be operated from the front surface 3a side of the case 3 and the operation unit 14d can be operated from the back surface 3b side of the case 3, the operation when the operation units 13d and 14d are operated separately is ensured. , The freedom of operation is expanded.
[0030]
7 to 12 show a third embodiment of the present invention. FIG. 7 is a perspective view of the disk cartridge. FIG. 8A is a crossing of the disk cartridge in which the erroneous erasure prevention switching mechanism is in a recording / erasable position on both sides. FIG. 8B is a longitudinal sectional view of the disk cartridge in which the erroneous erasure prevention switching mechanism is in a recordable / erasable position on both sides, and FIG. 9 is an enlarged view of the common opening / closing member, the front side opening / closing member and the back side opening / closing member. 10A is a cross-sectional view of the disk cartridge in which the common opening / closing member is in the neutral position, and the front-side opening / closing member and the back-side opening / closing member are in the recording / erasing position, and FIG. 10B is the common opening / closing member. Is a longitudinal sectional view of a disk cartridge in which the front side opening / closing member and the back side opening / closing member are in a recordable / erasable position, and FIG. 10 (C) is a disk car in which the common opening / closing member is in a common recordable / erasable position. FIG. 10D is a longitudinal sectional view of the disk cartridge in which the common opening / closing member is in the common recording / erasing position, and FIG. 11A is a disk in which the common opening / closing member is in the common recording / erasing prohibiting position. 11B is a longitudinal sectional view of the disk cartridge in which the common opening and closing member is in the common recording / erasing prohibiting position, and FIG. 11C is a common opening and closing member in the neutral position. FIG. 11D is a cross-sectional view of the disk cartridge in which the back side opening / closing member is in the recording / erasing prohibiting position. FIG. 11D is the common opening / closing member in the neutral position, and the front side opening / closing member and the back side opening / closing member are in the recording / erasing prohibiting position. 12A is a longitudinal sectional view of the disk cartridge, and FIG. 12A shows a common opening / closing member in a neutral position, a front-side opening / closing member in a recordable / erasable position (recording / erasing is possible on the disk A side), and a backside opening / closing member. FIG. 12B is a cross-sectional view of the disk cartridge at the recording / erasing prohibited position (recording / erasing prohibited on the disk B surface). FIG. 12B shows the common opening / closing member at the neutral position and the front side opening / closing member at the recording / erasing position (disc). FIG. 4 is a longitudinal sectional view of a disc cartridge in which recording / erasing is possible on the A side) and the back side opening / closing member is in a recording / erasing prohibiting position (recording / erasing is prohibited on the disc B side).
[0031]
7 to 12, the disk cartridge 1B of the third embodiment is different from the disk cartridge 1 of the first embodiment only in the configuration of the erroneous erasure prevention switching mechanism, and the other components are the same. In the drawings, the same components are denoted by the same reference numerals, description thereof is omitted, and only different components are described.
[0032]
That is, the erroneous erasure prevention switching mechanism 10 </ b> B has detection holes 11 and 12 opened on the front surface 3 a and the back surface 3 b of the case 3, respectively. The detection hole 11 on the front surface 3 a of the case 3 is for the back surface (B surface) of the disk 2, and the detection hole 12 on the back surface 3 b of the case 3 is for the front surface (A surface) of the disk 2. The detection hole 12 is opened and closed by a short front side opening / closing member 30, and the detection hole 11 is opened and closed by a short back side opening / closing member 31. The front surface side opening / closing member 30 and the back surface side opening / closing member 31 are arranged in parallel with an inner wall portion 32 disposed in parallel near the rear wall 15 of the case 3 and at a position deeper than the inner wall portion 32. It is slidably arranged in the left-right direction in a sliding space between the innermost side wall portion 33 at the position.
[0033]
Holes 34 and 35 are formed in the surfaces corresponding to the detection holes 12 and 11 of the front surface side opening and closing member 30 and the back surface side opening and closing member 31, respectively. The recording / erasing prohibition position (the position shown in FIGS. 11A to 11D) in which the holes 34 and 35 coincide with the positions of the detection holes 11 and 12, and the positions of the holes 34 and 35 in the detection holes 11 and 12, respectively. The front-side opening / closing member 30 and the rear-side opening / closing member 31 are separately located between the recordable / erasable positions (positions in FIGS. 10A to 10D) that block the detection holes 11 and 12 without matching each other. It can slide freely. The front-side opening / closing member 30 and the back-side opening / closing member 31 are provided with protrusions 30c, 31c via elastic portions 30b, 31b, respectively. Two recesses 36 and 37 into which the projections 30c and 31c are fitted are provided in the innermost side wall 33 at the left and right positions, and each projection has a recording / erasable position and a recording / erasure prohibiting position. The front-side opening / closing member 30 and the back-side opening / closing member 31 are configured to hold their positions by fitting the 30c and 31c.
[0034]
In addition, operation portions 30d and 31d are provided on the opposite surfaces of the front surface side opening / closing member 30 and the back surface side opening / closing member 31 that do not correspond to the detection holes 12 and 11, respectively. Are exposed to the outside through opening portions for operation 38 and 39 opened on the front surface 3a and the back surface 3b. Then, by operating each of the operation units 30d and 31d, the front-side opening / closing member 30 and the back-side opening / closing member 31 can be separately slid between the recordable / erasable position and the recordable / erasable prohibited position. .
[0035]
The erroneous erasure prevention switching mechanism 10B is provided with a long common opening / closing member 40 that is slightly shorter than the width of the case 3, and the common opening / closing member 40 is provided on the back wall 15 of the case 3 and the back wall 15. It is arranged to be slidable in the left-right direction in a sliding space between the adjacent inner wall portions 32 arranged in parallel. A common operation portion 40a is provided at a substantially central position in the left-right direction of the common opening / closing member 40 so as to protrude toward the back surface 3d side of the case 3. The common operation portion 40a is an operation opening portion opened on the back surface 3d side of the case 3. 41 is exposed to the outside. Then, by operating the common operation unit 40a, the common opening / closing member 40 is positioned at one side (the M direction in FIGS. 8A and 8B) with the neutral position (the positions of FIGS. 8A and 8B) in the middle. Common recording / erasable position (positions in FIGS. 10C and 10D) and the other side (N direction in FIGS. 8A and 8B) common recording / erasing prohibited position (FIG. 11A) , (B) position).
[0036]
In addition, a pair of outer pressing portions 40b and 40c and inner pressing portions 40d and 40e arranged at regular intervals is provided on both the left and right sides of the common opening / closing member 40, respectively. 40b, 40c and the inner pressing portions 40d, 40e extend from the notches (in particular, no reference numerals) of the inner wall portion 32 to slide spaces in which the front-side opening / closing member 30 and the rear-side opening / closing member 31 slide. . The front-side opening / closing member 30 is between the outer pressing portion 40b and the inner pressing portion 40d, and the back-side opening / closing member 31 is between the outer pressing portion 40c and the inner pressing portion 40e. Each is slidably arranged.
[0037]
At the neutral position of the common opening / closing member 40 (the positions shown in FIGS. 8A and 8B), the front side opening / closing member 30 and the back side opening / closing member 31 move between the recordable / erasable position and the recording / erasure prohibited position. Are allowed together. When the common opening / closing member 40 is slid from the neutral position to the common recordable / erasable position, the inner pressing portion 40d and the outer pressing portion when the front side opening / closing member 30 and the rear side opening / closing member 31 are not located in the recordable / erasable position. 40c presses the front-side opening / closing member 30 and the back-side opening / closing member 31 to forcibly place them on the recordable / erasable positions. When the common opening / closing member 40 is slid from the neutral position to the common recording / erasing prohibiting position, the outer pressing portion 40b and the inner pressing portion when the front-side opening / closing member 30 and the back-side opening / closing member 31 are not positioned at the recording / erasing prohibiting position. 40e presses the front-side opening / closing member 30 and the back-side opening / closing member 31 to forcibly place them in the recording / erasing prohibition position. That is, the front-side opening / closing member 30 and the back-side opening / closing member 31 are both positioned at the recording / erasable position by moving from the neutral position of the common opening / closing member 40 to the common recording / erasable position. By moving to the common recording / erasure prohibiting position, both the front surface side opening / closing member 30 and the back surface side opening / closing member 31 are positioned at the recording / erasing prohibition position.
[0038]
In addition, spring holding portions 42 and 42 are respectively fixed to both end portions on the back side in the case 3, and torsion coil springs 43 and 44 are respectively attached to the spring holding portions 42 and 42. The tips of one of the torsion coil springs 43, 44 (particularly not labeled) are fixed to the case 3, and the other arm (particularly not labeled) is the common opening / closing member 40. The spring action region is regulated by the stopper portions 45 (shown in FIGS. 10C and 11A) of the innermost side wall portion 33 and disposed on the outer surface sides of the outer pressing portions 40b and 40c on both sides of the inner side wall. Has been. That is, when the common opening / closing member 40 slides from the neutral position to the common recording / erasure prohibiting position or the common recording / erasable position, the bending of the torsion coil springs 43 and 44 on the opposite side to the sliding movement is restricted by the stopper portion 45. Then, only the torsion coil springs 44 and 43 on the slide movement side are bent in the direction in which the spring energy is stored and urged in the direction to return the common opening / closing member 40 to the neutral position. Therefore, the common opening / closing member 40 is located at a position other than the neutral position only when the operator operates the common operation unit 40a to slide to the common recording / erasing prohibited position or the common recording / erasable position. When the operation is finished and the hand is released from the common operation unit 40a, the neutral position is immediately restored.
[0039]
Next, the operation of the erroneous erasure prevention switching mechanism 10B of the disk cartridge 1B will be described. When both sides of FIGS. 10A and 10B are in a recordable / erasable position and the operator presses the common operation unit 40a with, for example, a finger in the direction of arrow N in FIGS. 10A and 10B, the surface The side opening / closing member 30 and the back side opening / closing member 31 slide together to the recording / erasure prohibition position (positions in FIGS. 11A and 11B) where the holes 34 and 35 coincide with the positions of the detection holes 12 and 11, respectively. Moving. When the operator removes his / her finger from the common operation portion 40a, the common opening / closing member 40 returns to the neutral position by the spring return force of the torsion coil spring 44 (positions in FIGS. 11C and 11D). Conversely, when the operator is in the recording / erasing prohibition position of FIGS. 11C and 11D and the operator presses the common operation unit 40a together with, for example, a finger in the direction of the arrow M in FIGS. 11C and 11D. Then, the front-side opening / closing member 30 and the back-side opening / closing member 31 slide together to move to the recordable / erasable positions (positions in FIGS. 10C and 10D) that block the detection holes 12 and 11. When the operator releases his / her finger from the common operation unit 40a, the common opening / closing member 40 returns to the neutral position by the spring return force of the torsion coil spring 43 (positions in FIGS. 10A and 10B).
[0040]
10A and 10B are both in a recordable / erasable position, and the operator moves the operation portion 31d of the back-side opening / closing member 31 with a finger, for example, as shown by the arrows in FIGS. 10A and 10B. When pressed in the N direction, only the back-side opening / closing member 31 slides and the hole 35 moves to the recording / erasing prohibiting position that coincides with the position of the detection hole 11, and as shown in FIGS. 12 (A) and 12 (B), Recording / erasing is possible on the disk A side, and recording / erasing is prohibited on the disk B side. 10A and 10B are both in a recordable / erasable position, and the operator moves the operation portion 30d of the front-side opening / closing member 30 with, for example, a finger in the direction of arrow N in FIGS. 10A and 10B. , Only the front-side opening / closing member 30 slides and the hole 34 moves to a recording / erasing prohibiting position that coincides with the position of the detection hole 12. Press to enter the recordable / erasable position.
[0041]
11C and 11D are both in the recording / erasing prohibition position, and the operator moves the operation portion 31d of the back side opening / closing member 31 with a finger, for example, as shown by the arrows in FIGS. 11C and 11D. When pressed in the M direction, only the back-side opening / closing member 31 slides and the hole 35 moves to a recordable / erasable position that does not coincide with the position of the detection hole 11. It becomes a recordable / erasable position on the B side. 11C and 11D are both in the recording / erasing prohibition position, and the operator moves the operation portion 30d of the front-side opening / closing member 30 with, for example, a finger in the direction of arrow M in FIGS. 11C and 11D. , Only the front-side opening / closing member 30 slides and the hole 34 moves to a recordable / erasable position that does not coincide with the position of the detection hole 12, and as shown in FIGS. Recording / erasing is possible on the surface, and recording / erasing is prohibited on the disk B surface.
[0042]
As described above, by operating the common operating portion 40a of the common opening / closing member 40, the front-side opening / closing member 30 and the back-side opening / closing member 31 are both in the recording / erasing prohibited position or the recording / erasable position. It is possible to simultaneously switch to the erasure prohibiting state or the recordable / erasable state with one operation, and at the neutral position of the common opening / closing member 40, the operation portions 30d and 31d of the front surface side opening / closing member 30 and the back surface side opening / closing member 31 are operated. Thus, it is possible to move between the recording / erasing prohibition position and the recording / erasable position separately, so that the operation can be switched to the recording / erasing prohibition state or the recording / erasable state separately for each side. Therefore, all four requirements can be met as in the first aspect of the invention.
[0043]
13 to 15 show a fourth embodiment of the present invention. FIG. 13 is an enlarged perspective view of the common opening / closing member, the front-side opening / closing member, and the back-side opening / closing member, and FIG. 14 (A) is the neutral opening / closing member. FIG. 14B is a cross-sectional view of the disk cartridge in which the front-side opening / closing member and the back-side opening / closing member are in a recordable / erasable position. FIG. 14B shows the common opening / closing member in the neutral position. FIG. 15A is a cross-sectional view of a disk cartridge at a common recording / erasing prohibited position, and FIG. 15B is a common common opening / closing member. FIG. 15C is a longitudinal sectional view of the disk cartridge at the recording / erasing prohibiting position, and FIG. 15C shows a disk cartridge in which the common opening / closing member is at the neutral position, and the front-side opening / closing member and the back-side opening / closing member are at the recording / erasing prohibiting position. Cross-sectional view of FIG. 15 (D) is a neutral position common closing member, the surface-side closing member and the rear surface side opening-closing member is a longitudinal sectional view of the disc cartridge is a recording-erasure inhibition position.
[0044]
13 to 15, the disc cartridge 1C of the fourth embodiment and the disc cartridge 1B of the third embodiment are compared, and the same components are denoted by the same reference numerals, description thereof is omitted, and different. Only the components will be described.
[0045]
That is, the common opening / closing member 46 of the erroneous erasure prevention switching mechanism 10C includes a neutral position (positions in FIGS. 14A and 14B, positions in FIGS. 15C and 15D) and a recording / erasure prohibiting position (see FIG. 15 (A) and (B) positions). Further, the torsion coil spring 44 is provided only on one side because it is required only when the common opening / closing member 46 is returned from the recording / erasing prohibition position to the neutral position. Further, the common opening / closing member 46 is a modification of the common opening / closing member 40 of the third embodiment, and 46a, 46b, 46c, 46e are formed in the same shape corresponding to 40a, 40b, 40c, 40e. However, since the front opening / closing member 30 and the back opening / closing member 31 are not forcibly positioned at the recordable / erasable positions by the common opening / closing member 46, one inner pressing portion of the common opening / closing member 46 (third embodiment). Is equivalent to 40d). However, the outer pressing portion 40 c of the common opening / closing member 46 remains as a spring pressing portion of the torsion coil spring 44.
[0046]
Next, the operation of the erroneous erasure prevention switching mechanism 10C of the disk cartridge 1C will be described. 14A and 14B are both in a recordable / erasable position, and the operator uses, for example, a finger to touch the common operation portion 46a of the common opening / closing member 46 in the direction of the N arrow in FIGS. 14A and 14B. , The front-side opening / closing member 30 and the back-side opening / closing member 31 slide together, and the recording / erasing prohibition positions (FIGS. 15A and 15B) in which the holes 34 and 35 coincide with the positions of the detection holes 12 and 11, respectively. ) Position). When the operator removes his / her finger from the common operation portion 46a, the common opening / closing member 46 returns to the neutral position by the spring return force of the torsion coil spring 44 (positions in FIGS. 15C and 15D). However, on the contrary, both sides of FIGS. 15C and 15D are in the recording / erasing prohibited position, and both sides can be recorded / erased by one operation by operating the common operation part 46a of the common opening / closing member 46. Cannot be switched simultaneously.
[0047]
14A and 14B are both in a recordable / erasable position, and the operator moves the operation portion 31d of the back-side opening / closing member 31 with a finger, for example, as shown by the arrows in FIGS. 14A and 14B. When pressed in the N direction, only the back-side opening / closing member 31 slides and the hole 35 moves to a recording / erasing prohibiting position coinciding with the position of the detection hole 11. It becomes the recording / erasing prohibition position on the B side. 14 (A) and 14 (B) are both in a recordable / erasable position, and the operator moves the operation portion 30d of the front side opening / closing member 30 with, for example, a finger in the direction of arrow N in FIGS. 14 (A) and 14 (B). , Only the front-side opening / closing member 30 slides and the hole 34 moves to a recording / erasing prohibiting position that coincides with the position of the detection hole 12. The record / erase position can be reached with.
[0048]
15C and 15D are both in the recording / erasing prohibition position, and the operator moves the operation portion 31d of the back-side opening / closing member 31 with a finger, for example, as shown by the arrows in FIGS. 15C and 15D. When pressed in the M direction, only the back-side opening / closing member 31 slides and the hole 35 moves to a recordable / erasable position that does not coincide with the position of the detection hole 11. It becomes a recordable / erasable position on the B side. 15C and 15D are both in the recording / erasing prohibition position, and the operator moves the operation portion 30d of the front-side opening / closing member 30 with, for example, a finger in the direction of the arrow M in FIGS. 15C and 15D. , Only the front-side opening / closing member 30 slides and the hole 34 moves to a recordable / erasable position that does not coincide with the position of the detection hole 12, and although not shown, recording / erasing is possible on the disk A surface, disk B surface Press to enter the recording / erasing prohibited position.
[0049]
As described above, by operating the common operation part 46a of the common opening / closing member 46, both the front-side opening / closing member 30 and the back-side opening / closing member 31 are in the recording / erasing prohibiting position. In the neutral position of the common opening / closing member 46, the recording / erasing prohibited position and the recording / erasing position can be separately controlled by operating the operation portions 30d, 31d of the front-side opening / closing member 30 and the back-side opening / closing member 31. Since it can be moved between erasable positions, it can be switched to a recording / erasing prohibited state or a recording / erasable state separately for each side. Therefore, all four requirements can be met as in the first aspect of the invention. In addition, since the front-side opening / closing member 30 and the back-side opening / closing member 31 cannot be set to the recordable / erasable positions by operating the common operation part 46a of the common opening / closing member 46, both sides can be recorded / erased in the same state. Therefore, it is not possible to perform switching operations at the same time in one operation, and it is possible to increase the safety when erasing or rewriting recorded information.
[0050]
According to the first and second embodiments, the through holes 17 and 18 of the blocking portions 13a and 14a of the front surface side opening and closing member 13 and the back surface side opening and closing member 14 are configured as through holes. 12 and 11 may be configured as a closed hole, or the portion may be formed as a notch, and the shape of the closed portions 13a and 14a may be such that no member is present in that portion. It may be configured. Moreover, in 3rd, 4th embodiment, although comprised as the holes 34 and 35 by which the opposite side to the detection hole was obstruct | occluded, you may comprise as a through-hole, a notch part, etc.
[0051]
Further, according to each of the embodiments, the operation openings 21, 21A, 21B, and 21C are arranged at the left and right center positions of the back surface 3d of the case 3, but may be arranged at positions shifted to the left and right from the center.
[0052]
In each of the above-described embodiments, the method of storing in the case 3 with the surface (A surface) of the disk 2 facing down has been described, but the method of storing in the case 3 with the surface (A surface) of the disk 2 facing up. Is also possible.
[0053]
【The invention's effect】
As described above, according to the first aspect of the present invention, a disc that can be recorded on both sides is rotatably housed inside, and a case in which recording or erasing can be performed on the disc from both front and back sides, and a surface of this case, There is a detection hole that opens on each of the back side, and the front side opening and closing member and the back side opening and closing member can be moved between the recordable / erasable position and the recordable / erasable prohibited position to open and close the detection holes on both sides. In the disk cartridge provided with the erroneous erasure prevention switching mechanism provided, the front surface side opening / closing member and the back surface side opening / closing member each have an operation portion, and both the operation portions are arranged in a vertically aligned position on the back surface of the case. The operation positions that are exposed to the outside through the operation opening that is open to the recording and erasable positions and the recording and erasure prohibited positions in both the operation parts are the same in the left-right direction. Since both operation units can be operated at the same time, both sides can be simultaneously switched to the same recording / erasing prohibited state or recording / erasable state with one operation, and each operation unit can be operated separately. Each side can be switched to the recording / erasing prohibited state or the recording / erasable state separately. Therefore, when a large amount of information is recorded across both sides of the disk as the first, the detection holes on both sides can be switched to recording / erasing prohibition at the same time with one operation, and second, simultaneously on both sides of the disk. When used in a recording system, the detection holes on both sides can be switched to recording / erasing prohibition simultaneously in one operation. Third, for safety reasons, both detection holes should be When erasing or rewriting the recorded information at the same time by operation, it is possible to switch to the recordable / erasable state while checking one side at a time. Fourth, the recording / erasure prohibited state and the recordable / erasable state separately for each side All four requirements for being able to switch to
[0054]
According to a second aspect of the present invention, in the disc cartridge according to the first aspect, the opening for operation extends to the front surface and the back surface of the case and opens to each opening portion on the front surface and the back surface. Since one end side of each operation portion is extended, in addition to the effect of the invention of claim 1, even if the thickness of the disk cartridge is set thin, an operation portion having a width sufficient for operation can be configured. In addition, since one operation unit can be operated from the front side of the case and the other operation unit from the back side of the case, the operation when each operation unit is operated separately is ensured, and the degree of freedom of operation is increased. spread.
[0055]
According to the third aspect of the present invention, there is a case capable of recording or erasing the disc from both the front and back surfaces, and detection holes opened on the front surface and the back surface of the case, and the detection holes on both surfaces are opened and closed. Accordingly, in the disk cartridge provided with the erroneous erasure prevention switching mechanism in which the front surface side opening / closing member and the back surface side opening / closing member are movably provided between the recordable / erasable position and the recording / erasure prohibiting position, Each of the back surface side opening / closing members has an operation portion, and both of the operation portions are exposed to the outside from the operation opening portions opened on the back surface and the front surface of the case, respectively, and are connected to the erroneous erasure prevention switching mechanism. Is provided with a common opening / closing member having a common operation portion exposed to the outside through an opening for operation opened on the back surface of the case, and the common opening / closing member has a neutral position in the middle and is shared on one side. It is provided movably between a recordable / erasable position and a common recording / erasure prohibiting position on the other side, and in the neutral position of the common opening / closing member, the recording / erasable position of the front surface side opening / closing member and the back surface side opening / closing member is provided. And the recording / erasure prohibiting position, and the front opening / closing member and the back opening / closing member can be recorded / erased by moving from the neutral position of the common opening / closing member to the common recording / erasable position. The front opening / closing member and the back opening / closing member are both positioned at the recording / erasing prohibited position by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibiting position. By operating the common operation part of the members, both the front side opening and closing member and the back side opening and closing member are in the recording / erasing prohibited position or the recording / erasable position, so both sides have the same recording It is possible to switch to the erasure prohibited state or the recordable / erasable state simultaneously with one operation, and at the neutral position of the common opening / closing member, recording / recording can be performed separately by operating the operation parts of the front-side opening / closing member and the back-side opening / closing member. Since it is possible to move between the erasure prohibition position and the recordable / erasable position, it is possible to switch to the recording / erasure prohibited state or the recordable / erasable state separately for each side. Accordingly, all four requirements can be met as in the first aspect of the invention.
[0056]
According to the invention of claim 4, there is a case capable of recording or erasing the disc from both the front and back surfaces, and detection holes opened on the front and back surfaces of the case, respectively, and opening and closing the detection holes on both surfaces. Accordingly, in the disk cartridge provided with an erroneous erasure prevention switching mechanism in which the front surface side opening / closing member and the back surface side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position, Each of the back surface side opening / closing members has an operation portion, and both of the operation portions are exposed to the outside from the operation opening portions opened on the front surface and the back surface of the case, respectively, and are connected to the erroneous erasure prevention switching mechanism. Is provided with a common opening / closing member having a common operation part exposed to the outside through an opening for operation opened on the back surface of the case, and the common opening / closing member has a neutral position and a common recording / erasing prohibited position. The neutral opening position of the common opening / closing member is allowed to move between the recording / erasing possible position and the recording / erasing prohibiting position of the front opening / closing member and the back opening / closing member, Since the front side opening / closing member and the back side opening / closing member are both positioned at the recording / erasing prohibited position by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibited position, the common operation of the common opening / closing member is performed. Since both the front side opening and closing member and the back side opening and closing member are in the recording / erasing prohibited position by operating the unit, both sides can be simultaneously switched to the same recording / erasing prohibited state with one operation, and the common opening / closing member is neutral. The position can be moved between the recording / erasing prohibited position and the recording / erasable position separately by operating each operation part of the front side opening / closing member and back side opening / closing member. Switching can be operated to record and erase prohibition state or the recording and erasable state. Therefore, all four requirements can be met as in the first aspect of the invention. In addition, since both the front side opening and closing member and the back side opening and closing member cannot be set to the recordable / erasable position by operating the common operating portion of the common opening and closing member, one operation is performed so that both sides are in the same recordable / erasable state. Since the switching operation cannot be performed at the same time, the recorded information can be erased or rewritten for greater safety.
[Brief description of the drawings]
FIG. 1 is a perspective view of a disc cartridge according to a first embodiment of the present invention.
FIGS. 2A and 2B show a first embodiment of the present invention, in which FIG. 2A is a cross-sectional view of a disk cartridge in which an erroneous erasure prevention switching mechanism is at a recordable / erasable position, and FIG. FIG. 3C is a longitudinal sectional view of the disk cartridge at the erasable position, and FIG. 4C is an enlarged perspective view of the front surface side opening / closing member and the back surface side opening / closing member constituting the erroneous erasure prevention switching mechanism.
FIGS. 3A and 3B show a first embodiment of the present invention, in which FIG. 3A is a cross-sectional view of a disk cartridge in which an erroneous erasure prevention switching mechanism is at a recording / erasing prohibiting position, and FIG. It is a longitudinal cross-sectional view of the disk cartridge which is an erasure prohibition position.
4A shows a first embodiment of the present invention, and FIG. 4A is a cross-sectional view of a disk cartridge in which an erroneous erasure prevention switching mechanism is recordable / erasable on the disk A surface and is a recording / erasure prohibited position on the disk B surface. (B) is a longitudinal cross-sectional view of a disk cartridge in which the erroneous erasure prevention switching mechanism is recordable / erasable on the disk A surface and is in a recording / erasure prohibiting position on the disk B surface.
FIG. 5 is a perspective view of a disk cartridge according to a second embodiment of the present invention.
6A and 6B show a second embodiment of the present invention, in which FIG. 6A is a cross-sectional view of a disk cartridge in which an erroneous erasure prevention switching mechanism is in a recordable / erasable position, and FIG. It is a longitudinal cross-sectional view of the disk cartridge which is an erasable position.
FIG. 7 is a perspective view of a disk cartridge according to a third embodiment of the present invention.
8A and 8B show a third embodiment of the present invention, in which FIG. 8A is a cross-sectional view of a disk cartridge in which the erroneous erasure prevention switching mechanism is in a recordable / erasable position on both sides, and FIG. 8B is an erroneous erasure prevention switching mechanism. FIG. 3 is a longitudinal sectional view of a disk cartridge that is a recordable / erasable position on both sides.
FIG. 9 is an enlarged perspective view of a common opening / closing member, a front-side opening / closing member, and a back-side opening / closing member according to the third embodiment of the present invention.
FIG. 10 shows a third embodiment of the present invention, in which (A) is a cross-sectional view of a disk cartridge in which the common opening / closing member is in the neutral position and the front-side opening / closing member and the back-side opening / closing member are in the recording / erasing position; (B) is a longitudinal sectional view of the disk cartridge in which the common opening / closing member is in the neutral position and the front-side opening / closing member and the back-side opening / closing member are in the recordable / erasable position, and (C) is the common recording / erasable position in the common opening / closing member. (D) is a longitudinal cross-sectional view of the disc cartridge in which the common opening / closing member is at the common recordable / erasable position.
11A and 11B show a third embodiment of the present invention, in which FIG. 11A is a cross-sectional view of a disk cartridge in which a common opening / closing member is in a common recording / erasing prohibiting position, and FIG. (C) is a cross-sectional view of the disk cartridge in which the common opening / closing member is in the neutral position, and the front-side opening / closing member and the back-side opening / closing member are in the recording / erasing prohibiting position. FIG. 5 is a longitudinal sectional view of a disk cartridge in which a common opening / closing member is in a neutral position and a front surface side opening / closing member and a back surface opening / closing member are in a recording / erasing prohibiting position.
12A and 12B show a third embodiment of the present invention, in which FIG. 12A shows a common opening / closing member in a neutral position, a front-side opening / closing member in a recordable / erasable position (recording / erasing is possible on the disk A surface), and a backside opening / closing. Cross-sectional view of the disk cartridge in which the member is in a recording / erasing prohibiting position (recording / erasing prohibition on the surface of the disk B), (B) is a common opening / closing member in a neutral position, and a front-side opening / closing member is in a recording / erasing position (disc FIG. 5 is a longitudinal sectional view of a disc cartridge in which recording / erasing is possible on the A side) and the back side opening / closing member is in a recording / erasing prohibiting position (recording / erasing is prohibited on the disc B side).
FIG. 13 is an enlarged perspective view of a common opening / closing member, a front-side opening / closing member, and a back-side opening / closing member according to the fourth embodiment of the present invention.
FIG. 14 shows a fourth embodiment of the present invention, in which (A) is a cross-sectional view of a disc cartridge in which the common opening / closing member is in the neutral position and the front side opening / closing member and the back side opening / closing member are in the recording / erasing position; (B) is a longitudinal sectional view of a disk cartridge in which the common opening / closing member is in a neutral position and the front-side opening / closing member and the back-side opening / closing member are in a recordable / erasable position.
FIGS. 15A and 15B show a fourth embodiment of the present invention, in which FIG. 15A is a cross-sectional view of a disk cartridge in which a common opening / closing member is at a common recording / erasing prohibiting position, and FIG. (C) is a cross-sectional view of the disk cartridge in which the common opening / closing member is in the neutral position, and the front-side opening / closing member and the back-side opening / closing member are in the recording / erasing prohibiting position. FIG. 5 is a longitudinal sectional view of a disk cartridge in which a common opening / closing member is in a neutral position and a front surface side opening / closing member and a back surface opening / closing member are in a recording / erasing prohibiting position.
FIG. 16 is a perspective view of a disk cartridge of a conventional example (second conventional example).
FIG. 17 is a partially exploded perspective view showing an erroneous erasure prevention switching mechanism for a disk cartridge of a conventional example (second conventional example).
[Explanation of symbols]
1,1A, 1B, 1C Disc cartridge
2 discs
3 cases
3a Surface
3b Back side
3d back
10, 10A, 10B, 10C Accidental erasure prevention switching mechanism
11,12 Detection hole
13, 30 Front side opening / closing member
13d, 30d operation unit
14, 31 Back side opening / closing member
14d, 31d operation unit
21, 21A, 38, 39, 41 Opening for operation
40, 46 Common opening and closing member
40a, 46a Common operation part

Claims

両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、
前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は上下に並んだ位置で前記ケースの背面に開口された操作用開口部より外部に共に露出され、前記双方の操作部における記録・消去可能位置と記録・消去禁止位置とになる操作位置が左右方向で同じ位置に設定されたことを特徴とするディスクカートリッジ。A disc that can be recorded on both sides is rotatably housed inside, a case capable of recording or erasing the disc from both the front and back sides, and a detection hole opened on each of the front and back sides of the case. In a disk cartridge comprising an erroneous erasure prevention switching mechanism in which a front surface side opening / closing member and a back surface side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes, respectively.
Each of the front surface side opening / closing member and the back surface side opening / closing member has an operation part, and both the operation parts are exposed to the outside from the operation opening part opened on the back surface of the case in a vertically aligned position. 2. A disk cartridge according to claim 1, wherein an operation position that is a recordable / erasable position and a recordable / erasable prohibited position in both the operation units are set to the same position in the left-right direction.

前記請求項１に記載のディスクカートリッジにおいて、
前記操作用開口部は、前記ケースの表面と裏面にまで延びて開口され、この表面と裏面の各開口箇所にまで前記各操作部の一端側が延設されていることを特徴とするディスクカートリッジ。The disk cartridge according to claim 1,
The disk cartridge according to claim 1, wherein the opening for operation extends to the front and back surfaces of the case, and one end side of each operation portion extends to each opening portion on the front and back surfaces.

両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、
前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの表面及び裏面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置を中間として一方側の共通記録・消去可能位置と他方側の共通記録・消去禁止位置との間で移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去可能位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去可能位置に位置させ、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させることを特徴とするディスクカートリッジ。A disc that can be recorded on both sides is rotatably housed inside, a case capable of recording or erasing the disc from both the front and back sides, and a detection hole opened on each of the front and back sides of the case. In a disk cartridge comprising an erroneous erasure prevention switching mechanism in which a front surface side opening / closing member and a back surface side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes, respectively.
The front-side opening / closing member and the back-side opening / closing member each have an operation part, and both the operation parts are exposed to the outside from the operation opening parts opened on the front surface and the back surface of the case, respectively. The accidental erasure prevention switching mechanism is provided with a common opening / closing member having a common operation portion exposed to the outside from the operation opening portion opened on the back surface of the case, and the common opening / closing member has a neutral position at an intermediate position on one side. A movable position is provided between the erasable position and the other side common recording / erasing prohibiting position, and at the neutral position of the common opening / closing member, the recording / erasable position of the front surface side opening / closing member and the back surface side opening / closing member The movement between the recording / erasure prohibiting positions is allowed, and the front side opening / closing member and the back side opening / closing member are moved by moving from the neutral position of the common opening / closing member to the common recording / erasable position. The front-side opening / closing member and the back-side opening / closing member are both positioned at the recording / erasing prohibition position by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibition position. A disc cartridge characterized by

両面に記録できるディスクが内部に回転自在に収納され、表裏両面から前記ディスクへの記録又は消去が可能なケースと、このケースの表面と裏面のそれぞれに開口する検出孔を有し、この両面の検出孔をそれぞれ開閉するべく表面側開閉部材及び裏面側開閉部材を記録・消去可能位置と記録・消去禁止位置との間で移動自在に設けた誤消去防止切換機構とを備えたディスクカートリッジにおいて、
前記表面側開閉部材及び前記裏面側開閉部材はそれぞれ操作部を有し、この双方の操作部は前記ケースの表面及び裏面にそれぞれ開口された操作用開口部より外部に共に露出されると共に、前記誤消去防止切換機構には前記ケースの背面に開口された操作用開口部より外部に露出する共通操作部を有する共通開閉部材を設け、この共通開閉部材は中立位置と共通記録・消去禁止位置との間でのみ移動自在に設けられ、前記共通開閉部材の中立位置では前記表面側開閉部材及び前記裏面側開閉部材の記録・消去可能位置と記録・消去禁止位置間の移動をそれぞれ許容し、前記共通開閉部材の中立位置から共通記録・消去禁止位置への移動によって前記表面側開閉部材及び前記裏面側開閉部材を共に記録・消去禁止位置に位置させることを特徴とするディスクカートリッジ。A disc that can be recorded on both sides is rotatably housed inside, a case capable of recording or erasing the disc from both the front and back sides, and a detection hole opened on each of the front and back sides of the case. In a disk cartridge comprising an erroneous erasure prevention switching mechanism in which a front surface side opening / closing member and a back surface side opening / closing member are movably provided between a recording / erasable position and a recording / erasure prohibiting position to open and close the detection holes, respectively.
The front-side opening / closing member and the back-side opening / closing member each have an operation part, and both the operation parts are exposed to the outside from the operation opening parts opened on the front surface and the back surface of the case, respectively. The accidental erasure prevention switching mechanism is provided with a common opening / closing member having a common operation part exposed to the outside from the opening for operation opened on the back surface of the case, and the common opening / closing member includes a neutral position, a common recording / erasure prohibiting position, Between the recording / erasable position and the recording / erasure prohibiting position of the front side opening / closing member and the back side opening / closing member at the neutral position of the common opening / closing member, respectively, The front-side opening / closing member and the back-side opening / closing member are both positioned at the recording / erasing prohibiting position by moving from the neutral position of the common opening / closing member to the common recording / erasing prohibiting position. Disk cartridge that.