JP4124346B2 - Disc cartridge - Google Patents

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JP4124346B2
JP4124346B2 JP2003157635A JP2003157635A JP4124346B2 JP 4124346 B2 JP4124346 B2 JP 4124346B2 JP 2003157635 A JP2003157635 A JP 2003157635A JP 2003157635 A JP2003157635 A JP 2003157635A JP 4124346 B2 JP4124346 B2 JP 4124346B2
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slider
engaging portion
half shell
elastic member
drive shaft
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JP2004362639A (en
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広史 岸田
健治 臼井
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、円盤形状をしたディスク状記録媒体を回転自在に収納するディスクカートリッジに関し、さらに詳しくは、開閉板を閉方向に付勢するために設けられる弾性部材と該弾性部材の端部を係合する前記開閉板が固着されるスライダ、および、ケース本体の構造に関するものである。
【0002】
【従来の技術】
従来から、光ディスク、光磁気ディスク等の円盤形状をしたディスク状記録媒体を機器装置にローディングするために、ディスク状記録媒体を回転自在に収納するディスクカートリッジが使用されている。そして、ディスクカートリッジは、未使用時にゴミ等の異物がヘッドアクセス窓及び駆動軸挿入窓から侵入するのを防止するために、ヘッドアクセス窓及び駆動軸挿入窓がシャッタで閉じられた状態を維持するように構成され、たとえば、捩りコイルばね(弾性部材)を用いて常にシャッタを閉止する方向に付勢している。そして、ディスクカートリッジをディスクドライブ装置に装着したときに、ディスクドライブ装置のシャッタ駆動ピンでシャッタを弾性部材の付勢力に抗して摺動させてヘッドアクセス窓及び駆動軸挿入窓を開き、ディスクへの読み書きを行なうようになっている。
【0003】
前記シャッタは、金属製やプラスチック製の開閉板のみからなるものと、金属製やプラスチック製の開閉板をプラスチック製スライダに固着したものとが存在するが、いずれの場合も、捩りコイルばねの一方の端部がシャッタ(開閉板あるいはスライダ)と係合し、他方の端部がディスクカートリッジのケース本体と係合するように構成されている。
【0004】
シャッタと捩りコイルばね、および、捩りコイルばねとケース本体との係合は、捩りコイルばねのディスクカートリッジへの組付けの容易さを考慮した構造、あるいは、一度組付けられた捩りコイルばねが衝撃等の外力により外れることがないような構造となっている(たとえば、特許文献1参照)。
【0005】
そのために、特許文献1のディスクカートリッジは、スライダの捩りコイルばねとの係合部が特殊な形状をすると共にカートリッジ本体の捩りコイルばねとの係合部についても結構複雑な形状をしており、スライダやケース本体の射出成形金型が複雑になり、それだけイニシャルコストが高くなるという問題があった。
【0006】
そこで、図2〜図5に示すようなシャッタ開閉構造を有するディスクカートリッジ1がある。このディスクカートリッジ1のケース本体2は上下一対のハーフシェル10からなり、上下ハーフシェル10は雄と雌の嵌合部が異なる以外は基本的にはほぼ同じ形状であり、上ハーフシェル10を例に挙げて説明する。前記上ハーフシェル10はその中央から前側端縁へ向かってディスクドライブ(図示せず)へのディスクカートリッジの装填方向に延在するヘッドアクセス窓及び駆動軸挿入窓13を備えると共に内面にディスクの収納空間を区画する周壁11と側端縁部に沿って延在する側壁12が形成され、前側端縁の前記側壁12は前記ヘッドアクセス窓及び駆動軸挿入窓13を挟んで一方(図3〜5上の右側)が他の側壁12よりケース本体2の厚み方向に低い側壁12’に構成されると共に前記側壁12’の前記ヘッドアクセス窓及び駆動軸挿入窓13から最も離れた位置に正面視円形状の凹部からなるハーフシェル係合部14が形成され、さらに前側端縁の前記側壁12、12’より前側端縁側内面に前側端縁に平行にレール状の凸状突起15が一体的に形成されている。なお、前記側壁12’を前記側壁12よりケース本体2の厚み方向に低く形成しているのは、後述する弾性部材40の腕部42の移動の妨げとなるのを防止し、ケース本体1の厚みを薄く構成するためである。
【0007】
そして、前記上ハーフシェル10に設けた前記凸状突起15にその溝部21で摺動可能にスライダ20が係合している。前記スライダ20は本体部20aと該本体部20aの長手方向の閉方向側に延設部20bとからなり、前記本体部20aの頂部で前記ヘッドアクセス窓及び駆動軸挿入窓13を開閉する略L字形状の金属製開閉板30が前記ハーフシェル10の前側端縁を跨いで固着されてシャッタとして機能するように構成されている。前記本体部20aの頂部に前記金属製開閉板30を位置決めするための位置決め用突起22(図4上は1箇所)と前記金属製開閉板30を螺着するためのねじ穴23(図4上は2箇所)および前記本体部20aの長手方向の閉方向側に偏った位置にシャッタを開閉するためのシャッタ駆動ピンと係合する受穴24および前記本体部20aの長手方向の開方向側の内面に正面視円形状の孔からなるスライダ係合部25と該スライダ係合部25を含む凹部26(図3、5上は正面視三角形状の凹部)が設けられている。当然、前記金属製開閉板30には前記スライダ20に形成した前記位置決め突起22と前記ねじ穴23に対応する位置に前記位置決め突起22と係合する位置決め穴31および皿ねじを挿通する挿通穴32および前記スライダ20に形成した前記受穴24に対応する位置に前記シャッタ駆動ピンを前記受穴24に導くための切欠開口33が形成されている。
【0008】
また、弾性部材40は、断面が円形弾性線状部材が巻かれたコイル部41と、このコイル部41から延びる2本の腕部42と、該2本の腕部42の先端部に同じ側に略直角に屈折された端部係合部43を有する、いわゆる捩りコイルばねであって、該捩りコイルばね40の一方の端部係合部43が前記スライダ係合部25と係合し、他方の端部係合部43が前記上ハーフシェル係合部14と係合し、常に前記スライダ20を閉方向側に付勢するようになっている。また、前記スライダ20に設けた前記凹部26(図3、5上は正面視三角形状の凹部)は、前記捩りコイルばね40の一方の端部係合部43と繋がっている前記弾性部材(捩りコイルばね)40の腕部42が前記ヘッドアクセス窓及び駆動軸挿入窓13を開閉する際に移動する軌跡に対応した大きさ(面積)の凹部となっている。
【0009】
上記のように構成された図3に示す前記上ハーフシェル10は、図示はしないが、前記上ハーフシェル10の前記周壁11内にディスク状記録媒体が収納され、その後に下ハーフシェル10を内面同士が対向するようにねじ等の接合手段で接合することにより、図2に示す両面読み書き可能なタイプのディスクカートリッジとなる。
【0010】
しかしながら、上下一対のハーフシェル10は、それぞれに前記スライダ20と前記金属製開閉板30を組付けて、弾性部材(捩りコイルばね)40のそれぞれの端部係合部43を前記スライダ20の前記スライダ係合部24と前記ハーフシェル10の前記ハーフシェル係合部14とに係合した形態を予め作製することになるが、ディスク状記録媒体を収納して上下ハーフシェル10を接合する前に、前記弾性部材(捩りコイルばね)40の端部係合部43が前記スライダ係合部24ないし前記ハーフシェル係合部14から離脱し、再度係合し直さねばならないという問題があった。これは、前記弾性線状部材(捩りコイルばね)40の直径より130%程度の大きさを有する正面視円形状の孔および凹部からなるスライダ係合部24およびハーフシェル係合部14としていたためである。そこで、前記弾性線状部材(捩りコイルばね)40の直径に対して同寸法ないし110%以内の大きさを有する正面視円形状の孔および凹部からなるスライダ係合部24およびハーフシェル係合部14を試作したが、前記弾性部材(捩りコイルばね)40を前記スライダ係合部24および前記ハーフシェル係合部14に装着し難くなると共に、シャッタ開閉時に前記弾性部材(捩りコイルばね)40と前記スライダ係合部24および前記ハーフシェル係合部14との接触抵抗が大きくなりシャッタ開閉時の動きが悪くなるという問題があった。
【0011】
【特許文献1】
実開平7−6978号公報
【0012】
【発明が解決しようとする課題】
そこで本発明は、上記問題を解決するためになしたものであって、その目的とするところは、ディスクカートリッジの組立作業時に、作業性よく弾性部材の端部係合部をスライダ係合孔ないしハーフシェル係合孔に組付けることができ、一度組付けられた弾性部材の端部係合部が前記スライダ係合孔ないしハーフシェル係合孔から離脱する虞のないディスクカートリッジを提供することにある。
【0013】
【課題を解決するための手段】
本発明者は、上記のような目的を達成するため、請求項1記載の発明は、少なくとも片面にヘッドアクセス窓及び駆動軸挿入窓が形成されると共にディスク状記録媒体を回転自在に収納する一対のハーフシェルからなるケース本体と、一方の前記ハーフシェルの前側端縁内面に前側端縁に平行に設けたレール状の凸状突起に係合して前記ケース本体の前側端縁に沿って摺動可能に設けたスライダと、該スライダに固着されて前記ヘッドアクセス窓及び駆動軸挿入窓を開閉する断面略L字状の開閉板と、前記スライダを一方向に付勢する弾性部材とを備えると共に前記弾性部材は断面円形状の弾性線状部材からなり、その一方の端部が前記スライダの長手方向の開方向側部に設けたスライダ係合部と係合し、他方の端部が前記一方のハーフシェルの内面に設けたハーフシェル係合部と係合する構成としたディスクカートリッジにおいて、前記スライダ係合部と前記ハーフシェル係合部とが正面視多角形の凹状部からなり、この多角形に内接する円の直径が前記弾性部材の円形弾性線状部材の直径に対して同寸法ないし110%以内であることを特徴とするものである。
【0014】
また、請求項2記載の本発明は、請求項1記載のディスクカートリッジにおいて、前記凹状部が正面視正三角形であることを特徴とするものである。
【0015】
【発明の実施の形態】
上記の本発明について、図面等を用いて以下に説明する。
本発明のディスクカートリッジは、従来技術の項で説明したディスクカートリッジ1と基本的に同じ構成からなるものであって、用いる符号の意味も同じである。図1は本発明にかかるディスクカートリッジの要部拡大平面図であって、従来技術の項で示した図5に対応する図であり、上ハーフシェル10の側壁12’の前記ヘッドアクセス窓及び駆動軸挿入窓13から最も離れた位置に従来技術の項で説明した正面視円形状の孔からなるハーフシェル係合部14に代えて正面視三角形状の凹部からなるハーフシェル係合部16が形成され、上ハーフシェル10のレール状の凸状突起15にスライダ20がその溝部21で係合し、前記スライダ20の本体部20aの頂部で前記ヘッドアクセス窓及び駆動軸挿入窓13を開閉する略L字形状の金属製開閉板30が従来技術の項で説明したように前記ハーフシェル10の前側端縁を跨いで固着されている。
【0016】
また、前記スライダ20の前記本体部20aの長手方向の開方向側の内面に正面視円形状の孔からなるスライダ係合部25に代えて正面視三角形状の孔からなるスライダ係合部27と該スライダ係合部27を含む凹部26(図1上は正面視三角形状の凹部)が設けられている。
【0017】
そして、前記ハーフシェル係合部16および前記スライダ係合部27に断面が円形弾性線状部材からなる弾性部材、すなわち、捩りコイルばね40の端部係合部43がそれぞれ係合し、図3に示すと同じようにスライダ20を閉方向側に付勢している。
【0018】
前記ハーフシェル係合孔16および前記スライダ係合孔27は、それぞれの内接円の直径が前記捩りコイルばね40の円形弾性線状部材の直径に対して同寸法ないし110%以内であるように構成され、前記ハーフシェル係合部16および前記スライダ係合部27に前記弾性部材を装着する際に、前記ハーフシェル係合部16および前記スライダ係合部27と前記弾性部材との当接箇所が同様な直径の正面視円形状のハーフシェル係合部およびスライダ係合部に比べて少ないために装着し易く、かつ、一度装着した弾性部材は前記ハーフシェル係合部16および前記スライダ係合部27のそれぞれの当接箇所で保持されるために前記ハーフシェル係合部16および前記スライダ係合部27から離脱する虞のないものとすることができる。
【0019】
実施例においては、前記ハーフシェル係合部16および前記スライダ係合部27の正面視形状を三角形としたが、4角形であっても5角形であっても、さらにこれらより多角形であってもよいものであるが、多角形にすればする程、円形に近づくために、前記ハーフシェル係合部16および前記スライダ係合部27と前記弾性部材との当接箇所が多くなり、装着し難くなるために、好ましくは8角形、より好ましくは6角形までである。また、多角形の形状としては正多角形が好ましく、さらに好ましくは正三角形である。
【0020】
また、今までの説明では、両面読み書き可能なタイプのディスクカートリッジとして説明してきたが、片面読み書き可能なタイプであってもよいものである。
【0021】
【発明の効果】
以上説明してきたように、本発明は、少なくとも片面にヘッドアクセス窓及び駆動軸挿入窓が形成されると共にディスク状記録媒体を回転自在に収納する一対のハーフシェルからなるケース本体と、一方の前記ハーフシェルの前側端縁内面に前側端縁に平行に設けたレール状の凸状突起に係合して前記ケース本体の前側端縁に沿って摺動可能に設けたスライダと、該スライダに固着されて前記ヘッドアクセス窓及び駆動軸挿入窓を開閉する断面略L字状の開閉板と、前記スライダを一方向に付勢する弾性部材とを備えると共に前記弾性部材は断面円形状の弾性線状部材からなり、その一方の端部が前記スライダの長手方向の開方向側部に設けたスライダ係合部と係合し、他方の端部が前記一方のハーフシェルの内面に設けたハーフシェル係合部と係合する構成としたディスクカートリッジにおいて、前記スライダ係合部と前記ハーフシェル係合部とが正面視多角形の凹状部からなり、この多角形に内接する円の直径が前記弾性部材の円形弾性線状部材の直径に対して同寸法ないし110%以内である構成とすることにより、また、好ましくは正面視多角形を正面視正多角形とすることにより、また、さらに好ましくは正面視正多角形を正面視正三角形とすることにより、ディスクカートリッジの組立作業時に、作業性よく弾性部材の端部係合部をスライダ係合孔ないしハーフシェル係合孔に組付けることができると共に一度組付けられた弾性部材の端部係合部が前記スライダ係合孔ないしハーフシェル係合孔から離脱する虞がなく、再度係合し直す作業をなくすことができるという効果を奏する。
【図面の簡単な説明】
【図1】 本発明にかかるディスクカートリッジの要部拡大平面図である。
【図2】 従来のディスクカートリッジの一実施形態を示す斜視図である。
【図3】 従来のシャッタの開閉構造を説明するハーフシェルの前端縁側の内面図である。
【図4】 図3の分解斜視図である。
【図5】 図3の弾性部材を組付ける前の要部拡大平面図である。
【符号の説明】
1 ディスクカートリッジ
2 ケース本体
10 ハーフシェル
11 周壁
12、12’ 側壁
13 ヘッドアクセス窓及び駆動軸挿入窓
14、16 ハーフシェル係合部
15 凸状突起
20 スライダ
20a スライダ本体部
20b スライダ延設部
21 溝部
22 位置決め突起
23 ねじ穴
24 受穴
25、27 スライダ係合部
26 凹部
30 開閉板
31 位置決め穴
32 挿通穴
33 切欠開口
40 弾性部材(捩りコイルばね)
41 コイル部
42 腕部
43 端部係合部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge that rotatably stores a disk-shaped disk-shaped recording medium, and more particularly, relates to an elastic member provided to bias an opening / closing plate in a closing direction and an end of the elastic member. The present invention relates to the structure of the slider and the case body to which the open / close plate to be joined is fixed.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to load a disk-shaped recording medium such as an optical disk or a magneto-optical disk into a device, a disk cartridge that rotatably stores the disk-shaped recording medium has been used. The disk cartridge maintains a state in which the head access window and the drive shaft insertion window are closed by the shutter in order to prevent foreign matters such as dust from entering the head access window and the drive shaft insertion window when not in use. For example, a torsion coil spring (elastic member) is always used to bias the shutter in the closing direction. Then, when the disk cartridge is mounted on the disk drive device, the shutter access pin of the disk drive device slides the shutter against the urging force of the elastic member to open the head access window and the drive shaft insertion window, and to the disk. Read and write.
[0003]
There are shutters made of only a metal or plastic opening / closing plate and those made of a metal or plastic opening / closing plate fixed to a plastic slider. In either case, one of the torsion coil springs is used. The other end is engaged with the shutter (opening / closing plate or slider), and the other end is engaged with the case main body of the disk cartridge.
[0004]
The engagement between the shutter and the torsion coil spring, and the torsion coil spring and the case main body has a structure considering the ease of assembling the torsion coil spring to the disc cartridge, or the torsion coil spring once assembled has an impact. The structure is such that it does not come off due to external forces such as the above (for example, see Patent Document 1).
[0005]
Therefore, the disk cartridge of Patent Document 1 has a special shape in the engaging portion with the torsion coil spring of the slider, and the engaging portion with the torsion coil spring in the cartridge body has a rather complicated shape. There is a problem that the injection mold for the slider and the case main body becomes complicated, and the initial cost increases accordingly.
[0006]
Therefore, there is a disk cartridge 1 having a shutter opening / closing structure as shown in FIGS. The case body 2 of the disk cartridge 1 is composed of a pair of upper and lower half shells 10. The upper and lower half shells 10 have basically the same shape except for the male and female fitting portions, and the upper half shell 10 is taken as an example. Will be described. The upper half shell 10 is provided with a head access window and a drive shaft insertion window 13 extending from the center toward the front end edge in the loading direction of the disk cartridge into the disk drive (not shown) and storing the disk on the inner surface. A peripheral wall 11 defining a space and a side wall 12 extending along the side edge are formed, and the side wall 12 at the front side edge is sandwiched between the head access window and the drive shaft insertion window 13 (FIGS. 3 to 5). The upper right side) is configured as a side wall 12 ′ that is lower in the thickness direction of the case body 2 than the other side wall 12, and is a front view circle at a position farthest from the head access window and the drive shaft insertion window 13 of the side wall 12 ′. A half-shell engaging portion 14 formed of a concave portion is formed, and a rail-like convex protrusion 15 is integrated with the inner surface of the front edge side parallel to the front edge from the side walls 12, 12 ′ of the front edge. It is formed in. The fact that the side wall 12 'is formed lower than the side wall 12 in the thickness direction of the case body 2 prevents the movement of the arm portion 42 of the elastic member 40, which will be described later, This is because the thickness is reduced.
[0007]
A slider 20 is engaged with the convex protrusion 15 provided on the upper half shell 10 so as to be slidable by the groove 21. The slider 20 includes a main body portion 20a and an extending portion 20b extending in the longitudinal direction of the main body portion 20a. The slider 20 substantially opens and closes the head access window and the drive shaft insertion window 13 at the top of the main body portion 20a. A letter-shaped metal opening / closing plate 30 is fixed to straddle the front edge of the half shell 10 and functions as a shutter. Positioning projections 22 for positioning the metal opening / closing plate 30 on the top of the main body 20a (one place in FIG. 4) and screw holes 23 for screwing the metal opening / closing plate 30 (upper in FIG. 4). 2) and a receiving hole 24 that engages with a shutter drive pin for opening and closing the shutter at a position biased toward the closing direction in the longitudinal direction of the main body portion 20a and the inner surface on the opening direction side in the longitudinal direction of the main body portion 20a. Are provided with a slider engaging portion 25 formed of a hole having a circular shape when viewed from the front and a concave portion 26 including the slider engaging portion 25 (the concave portion having a triangular shape when viewed from the front in FIGS. 3 and 5). Naturally, the metal opening / closing plate 30 has a positioning hole 31 that engages with the positioning protrusion 22 at a position corresponding to the positioning protrusion 22 and the screw hole 23 formed on the slider 20 and an insertion hole 32 through which a countersunk screw is inserted. A notch opening 33 for guiding the shutter drive pin to the receiving hole 24 is formed at a position corresponding to the receiving hole 24 formed in the slider 20.
[0008]
The elastic member 40 includes a coil portion 41 wound with an elastic linear member having a circular cross section, two arm portions 42 extending from the coil portion 41, and the same side of the distal ends of the two arm portions 42. A so-called torsion coil spring having one end engaging portion 43 of the torsion coil spring 40 engaged with the slider engaging portion 25. The other end engaging portion 43 is engaged with the upper half shell engaging portion 14 so as to always urge the slider 20 toward the closing direction. Further, the concave portion 26 (a concave portion having a triangular shape in front view in FIGS. 3 and 5) provided in the slider 20 is connected to the one end engaging portion 43 of the torsion coil spring 40. The arm portion 42 of the (coil spring) 40 is a recess having a size (area) corresponding to a locus that moves when the head access window and the drive shaft insertion window 13 are opened and closed.
[0009]
The upper half shell 10 shown in FIG. 3 configured as described above is not shown, but a disk-shaped recording medium is accommodated in the peripheral wall 11 of the upper half shell 10, and then the lower half shell 10 is disposed on the inner surface. By joining with a joining means such as a screw so that they face each other, the double-sided readable / writable type disk cartridge shown in FIG. 2 is obtained.
[0010]
However, the pair of upper and lower half shells 10 are each assembled with the slider 20 and the metal opening / closing plate 30, and the end engaging portions 43 of the elastic members (torsion coil springs) 40 are connected to the slider 20. A configuration in which the slider engaging portion 24 and the half shell engaging portion 14 of the half shell 10 are engaged with each other is prepared in advance, but before the disc-shaped recording medium is accommodated and the upper and lower half shells 10 are joined. There is a problem that the end engaging portion 43 of the elastic member (torsion coil spring) 40 has to be detached from the slider engaging portion 24 or the half shell engaging portion 14 and re-engaged. This is because the slider engaging portion 24 and the half shell engaging portion 14 are formed of a hole and a concave portion having a circular shape when viewed from the front and having a size of about 130% of the diameter of the elastic linear member (torsion coil spring) 40. It is. Therefore, the slider engaging portion 24 and the half shell engaging portion which are formed of a hole and a concave portion having a circular shape when viewed from the front and having the same dimension or a size within 110% with respect to the diameter of the elastic linear member (torsion coil spring) 40. 14, but it is difficult to attach the elastic member (torsion coil spring) 40 to the slider engagement portion 24 and the half shell engagement portion 14, and the elastic member (torsion coil spring) 40 when the shutter is opened and closed. There is a problem that the contact resistance between the slider engaging portion 24 and the half shell engaging portion 14 is increased, and the movement at the time of opening and closing the shutter is deteriorated.
[0011]
[Patent Document 1]
Japanese Utility Model Publication No. 7-6978 [0012]
[Problems to be solved by the invention]
Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an end engaging portion of the elastic member with a slider engaging hole or a hole with good workability when the disk cartridge is assembled. To provide a disc cartridge that can be assembled to a half shell engagement hole and in which an end engagement portion of an elastic member once assembled is not likely to be detached from the slider engagement hole or the half shell engagement hole. is there.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the inventor of the present invention has a pair of inventions in which a head access window and a drive shaft insertion window are formed on at least one surface and a disc-shaped recording medium is rotatably accommodated. A half-shell case main body, and a rail-like protrusion provided on the inner surface of the front end edge of one of the half shells in parallel with the front end edge, and sliding along the front end edge of the case main body. A movable slider, a substantially L-shaped opening / closing plate fixed to the slider for opening and closing the head access window and the drive shaft insertion window, and an elastic member for biasing the slider in one direction. In addition, the elastic member is an elastic linear member having a circular cross section, and one end thereof is engaged with a slider engaging portion provided on an opening side in the longitudinal direction of the slider, and the other end is One half shell In the disk cartridge configured to engage with the half shell engaging portion provided on the inner surface of the disk, the slider engaging portion and the half shell engaging portion are polygonal concave portions when viewed from the front. The diameter of the circle in contact is the same as the diameter of the circular elastic linear member of the elastic member or 110% or less.
[0014]
According to a second aspect of the present invention, in the disk cartridge according to the first aspect, the concave portion is a regular triangle in front view.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The above-described present invention will be described below with reference to the drawings.
The disc cartridge of the present invention has basically the same configuration as the disc cartridge 1 described in the section of the prior art, and the meanings of the symbols used are the same. FIG. 1 is an enlarged plan view of a main part of a disk cartridge according to the present invention, corresponding to FIG. 5 shown in the section of the prior art, and the head access window and drive of the side wall 12 ′ of the upper half shell 10 A half shell engaging portion 16 formed of a concave portion having a triangular shape in front view is formed in place of the half shell engaging portion 14 formed of a circular hole in front view described in the section of the prior art at a position farthest from the shaft insertion window 13. The slider 20 is engaged with the rail-like convex protrusion 15 of the upper half shell 10 by the groove portion 21, and the head access window and the drive shaft insertion window 13 are opened and closed at the top of the main body portion 20 a of the slider 20. The L-shaped metal opening / closing plate 30 is fixed across the front end edge of the half shell 10 as described in the section of the prior art.
[0016]
Further, instead of the slider engaging portion 25 having a circular hole in front view on the inner surface of the slider 20 on the opening direction side in the longitudinal direction, a slider engaging portion 27 having a triangular hole in front view and A concave portion 26 (a concave portion having a triangular shape in front view in FIG. 1) including the slider engaging portion 27 is provided.
[0017]
Then, the half shell engaging portion 16 and the slider engaging portion 27 are engaged with elastic members each having a circular elastic cross section, that is, the end engaging portion 43 of the torsion coil spring 40, respectively. The slider 20 is urged toward the closing direction as shown in FIG.
[0018]
The half shell engagement hole 16 and the slider engagement hole 27 have a diameter of an inscribed circle that is equal to or less than 110% of the diameter of the circular elastic linear member of the torsion coil spring 40. When the elastic member is mounted on the half shell engaging portion 16 and the slider engaging portion 27, the contact portion between the half shell engaging portion 16 and the slider engaging portion 27 and the elastic member is configured. Is smaller than the half shell engaging portion and the slider engaging portion having the same diameter and having a circular shape when viewed from the front, and the elastic member once attached is easy to install, and the elastic member once attached is the half shell engaging portion 16 and the slider engaging portion. Since it is held at each contact portion of the portion 27, there is no possibility of detachment from the half shell engaging portion 16 and the slider engaging portion 27.
[0019]
In the embodiment, the front-view shape of the half shell engaging portion 16 and the slider engaging portion 27 is a triangle, but it may be a polygon or a pentagon, and more polygonal than these. However, the more the polygonal shape is, the closer to the circular shape, the more the abutting portions between the half shell engaging portion 16 and the slider engaging portion 27 and the elastic member are attached. In order to be difficult, it is preferably an octagon, more preferably a hexagon. The polygonal shape is preferably a regular polygon, more preferably a regular triangle.
[0020]
In the description so far, the disk cartridge has been described as a double-sided readable / writable type disk cartridge, but a single-sided readable / writable type may be used.
[0021]
【The invention's effect】
As described above, the present invention has a case main body formed of a pair of half shells, in which a head access window and a drive shaft insertion window are formed on at least one surface, and a disc-shaped recording medium is rotatably stored, A slider provided on the inner surface of the front edge of the half shell so as to be slidable along the front edge of the case body by engaging a rail-like convex protrusion provided parallel to the front edge, and fixed to the slider And an opening / closing plate having a substantially L-shaped cross section for opening and closing the head access window and the drive shaft insertion window, and an elastic member for urging the slider in one direction, and the elastic member is an elastic line having a circular cross section. The half shell engagement is made of a member, one end of which engages with a slider engagement portion provided on the side of the slider in the longitudinal direction and the other end of which is provided on the inner surface of the one half shell. Together The slider engaging portion and the half shell engaging portion are formed of a polygonal concave portion when viewed from the front, and the diameter of a circle inscribed in the polygon is the circular shape of the elastic member. By adopting a configuration in which the diameter is equal to or less than 110% with respect to the diameter of the elastic linear member, preferably, the front view polygon is a front view regular polygon, and more preferably, the front view regularity is By making the polygon a regular triangle when viewed from the front, the end engaging portion of the elastic member can be assembled to the slider engaging hole or the half shell engaging hole with good workability when assembling the disk cartridge. There is no possibility that the end engaging portion of the attached elastic member is detached from the slider engaging hole or the half shell engaging hole, and the work of re-engaging can be eliminated. Achieve the results.
[Brief description of the drawings]
FIG. 1 is an enlarged plan view of a main part of a disc cartridge according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a conventional disk cartridge.
FIG. 3 is an inner surface view of a front end edge side of a half shell for explaining a conventional shutter opening / closing structure.
4 is an exploded perspective view of FIG. 3. FIG.
FIG. 5 is an enlarged plan view of a main part before assembling the elastic member of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc cartridge 2 Case main body 10 Half shell 11 Peripheral wall 12, 12 'Side wall 13 Head access window and drive shaft insertion window 14, 16 Half shell engaging part 15 Convex protrusion 20 Slider 20a Slider main body part 20b Slider extension part 21 Groove part 22 Positioning projection 23 Screw hole 24 Receiving hole 25, 27 Slider engagement part 26 Recess 30 Opening / closing plate 31 Positioning hole 32 Insertion hole 33 Notch opening 40 Elastic member (torsion coil spring)
41 Coil part 42 Arm part 43 End part engaging part

Claims (2)

少なくとも片面にヘッドアクセス窓及び駆動軸挿入窓が形成されると共にディスク状記録媒体を回転自在に収納する一対のハーフシェルからなるケース本体と、一方の前記ハーフシェルの前側端縁内面に前側端縁に平行に設けたレール状の凸状突起に係合して前記ケース本体の前側端縁に沿って摺動可能に設けたスライダと、該スライダに固着されて前記ヘッドアクセス窓及び駆動軸挿入窓を開閉する断面略L字状の開閉板と、前記スライダを一方向に付勢する弾性部材とを備えると共に前記弾性部材は断面円形状の弾性線状部材からなり、その一方の端部が前記スライダの長手方向の開方向側部に設けたスライダ係合部と係合し、他方の端部が前記一方のハーフシェルの内面に設けたハーフシェル係合部と係合する構成としたディスクカートリッジにおいて、前記スライダ係合部と前記ハーフシェル係合部とが正面視多角形の凹状部からなり、この多角形に内接する円の直径が前記弾性部材の円形弾性線状部材の直径に対して同寸法ないし110%以内であることを特徴とするディスクカートリッジ。A case main body formed of a pair of half shells, in which a head access window and a drive shaft insertion window are formed on at least one side and which rotatably stores a disk-shaped recording medium, and a front edge on the inner surface of the front edge of one of the half shells A slider which is slidable along the front side edge of the case body by engaging with a rail-like convex protrusion provided in parallel with the head, and the head access window and the drive shaft insertion window fixed to the slider An open / close plate having a substantially L-shaped cross section for opening and closing, and an elastic member for urging the slider in one direction, and the elastic member is formed of an elastic linear member having a circular cross section, one end of which is A disc car configured to engage with a slider engaging portion provided on the side of the slider in the longitudinal direction and the other end engages with a half shell engaging portion provided on the inner surface of the one half shell. In the ridge, the slider engaging portion and the half shell engaging portion are polygonal concave portions when viewed from the front, and the diameter of a circle inscribed in the polygon is smaller than the diameter of the circular elastic linear member of the elastic member. A disc cartridge having the same size or within 110%. 前記凹状部が正面視正三角形であることを特徴とする請求項1記載のディスクカートリッジ。2. The disc cartridge according to claim 1, wherein the concave portion is a regular triangle in front view.
JP2003157635A 2003-06-03 2003-06-03 Disc cartridge Expired - Fee Related JP4124346B2 (en)

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JP4124346B2 true JP4124346B2 (en) 2008-07-23

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