JP2903510B2 - Resin shutter for magnetic disk drive - Google Patents
Resin shutter for magnetic disk driveInfo
- Publication number
- JP2903510B2 JP2903510B2 JP3106099A JP10609991A JP2903510B2 JP 2903510 B2 JP2903510 B2 JP 2903510B2 JP 3106099 A JP3106099 A JP 3106099A JP 10609991 A JP10609991 A JP 10609991A JP 2903510 B2 JP2903510 B2 JP 2903510B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- opening window
- shutter
- magnetic disk
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形により製造さ
れる磁気ディスク装置の樹脂製シャッターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin shutter for a magnetic disk drive manufactured by injection molding.
【０００２】[0002]
【従来の技術】従来より、磁気ディスク装置の一種であ
るマイクロフロッピーディスクは、図５に示すように、
開口窓１を有するシェルケース２に磁気ディスク３を内
蔵し、シェルケース２に摺動自在に組み付けられたシャ
ッター４により、磁気ディスク３の一部を露出させる前
記開口窓１を開閉するようにしている。前記シャッター
４は、相対向する一対の板状部５と、これら板状部５の
一端縁同志を一体に連結する連結部６とにより断面ほぼ
コ字形状に形成されており、前記両板状部５にシェルケ
ース２の開口窓１に重なる開口窓７がそれぞれ開口形成
されている。前記シャッター４は、金属板をプレス加工
してなるものもあるが、合成樹脂の成形品からなるもの
もある。従来、シャッター４を樹脂により射出成形する
場合に用いられる金型としては、図６および図７に示す
ものが知られている。この金型は、シャッター４の連結
部６の外面に対応するキャビティ面を形成する固定側金
型部材11と可動側金型部材とを備えており、さらに、こ
の可動側金型部材は、シャッター４の一方の板状部５の
外面に対応するキャビティ面を形成する第１割型12と、
他方の板状部５の外面に対応するキャビティ面を形成す
る第２割型13と、シャッター４の内面に対応するキャビ
ティ面を形成するコア14とからなっている。これらの固
定側金型部材11、第１割型12、第２割型13およびコア14
は、型開時図６に矢印で示す方向へ相対的に移動する。
ところで、前記金型においては、開口窓７の外側の部分
は割型12，13により形成しているが、開口窓７の内側の
部分はコア14により形成しているため、板状部５におけ
る開口窓７よりも反連結部側（図示下側）の横棧部15が
コア14の抜き方向に対してアンダーカットとなり、離型
時に無理抜きが行われる。そして、前記従来のシャッタ
ー４においては、開口窓７の内側周縁部に、前記横棧部
15を含めて、開口窓７から離れるに従い他方の板状部５
に近付く方向へ傾斜した傾斜面16を形成しているが、こ
の傾斜面16は、図示の角度αが45°以下で、コア14の抜
き方向に対してなす角度が大きくなっており、その結
果、横棧部15の内面のほとんどはコア14の抜き方向とほ
ぼ平行な平行面17になっている。2. Description of the Related Art Conventionally, a micro floppy disk, which is a kind of magnetic disk device, has a structure as shown in FIG.
A magnetic disk 3 is built in a shell case 2 having an opening window 1, and the opening window 1 that exposes a part of the magnetic disk 3 is opened and closed by a shutter 4 slidably mounted on the shell case 2. I have. The shutter 4 is formed in a substantially U-shaped cross section by a pair of plate portions 5 facing each other and a connecting portion 6 that integrally connects one end edges of the plate portions 5 to each other. An opening window 7 overlapping with the opening window 1 of the shell case 2 is formed in the portion 5. The shutter 4 may be formed by pressing a metal plate, or may be formed by molding a synthetic resin. Conventionally, as a mold used when the shutter 4 is injection-molded with a resin, those shown in FIGS. 6 and 7 are known. The mold includes a fixed mold member 11 and a movable mold member forming a cavity surface corresponding to the outer surface of the connecting portion 6 of the shutter 4, and the movable mold member further includes a shutter. A first split mold 12 for forming a cavity surface corresponding to the outer surface of one of the plate-shaped portions 5 of 4;
It comprises a second split mold 13 forming a cavity surface corresponding to the outer surface of the other plate-like portion 5 and a core 14 forming a cavity surface corresponding to the inner surface of the shutter 4. The fixed mold member 11, the first split mold 12, the second split mold 13 and the core 14
Moves relatively in the direction indicated by the arrow in FIG. 6 when the mold is opened.
By the way, in the above-mentioned mold, the portion outside the opening window 7 is formed by the split molds 12 and 13, but the portion inside the opening window 7 is formed by the core 14. The horizontal ridge portion 15 on the side opposite to the connecting portion (the lower side in the drawing) with respect to the opening window 7 is undercut in the direction in which the core 14 is removed, and forcible removal is performed at the time of release from the mold. In the conventional shutter 4, the horizontal portion is provided on the inner peripheral portion of the opening window 7.
15 and the other plate-like portion 5
The inclined surface 16 is inclined in a direction approaching the angle .The inclined surface 16 has an angle α of 45 ° or less, as shown in FIG. Most of the inner surface of the horizontal member 15 is a parallel surface 17 that is substantially parallel to the direction in which the core 14 is pulled out.
【０００３】[0003]
【発明が解決しようとする課題】前記横棧部15の内面の
ほとんどがコア14の抜き方向とほぼ平行な平行面17にな
っている従来の樹脂製シャッター４においては、コア14
からのシャッター４の離型時にアンダーカットとなる横
棧部15が大きな抵抗力を生じるため、開口窓７の位置や
大きさを含めたシャッター４の寸法についての規格上横
棧部15の幅が小さくなっていることもあって、離型後の
シャッター４の横棧部15に図８に示すような歪みが生じ
やすいなどの問題点があった。本発明は、前記問題点を
解決して、開口窓の形成のためにアンダーカットとなる
横棧部の無理抜きを行う磁気ディスク装置の樹脂製シャ
ッターにおいて、離型性を向上させ、横棧部に歪みなど
の不都合が生じないようにすることを目的とする。In the conventional resin shutter 4 in which most of the inner surface of the horizontal ridge 15 is a parallel surface 17 substantially parallel to the direction in which the core 14 is pulled out, the core 14
Since the horizontal portion 15 which is undercut when the shutter 4 is released from the mold generates a large resistance, the width of the horizontal portion 15 in terms of the dimensions of the shutter 4 including the position and size of the opening window 7 is limited. Due to the size reduction, there has been a problem that the horizontal ridge 15 of the shutter 4 after the mold release tends to be distorted as shown in FIG. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and in a resin shutter of a magnetic disk drive that forcibly removes a horizontal ridge portion that becomes an undercut to form an opening window, the mold release property is improved and the horizontal ridge portion is improved. An object of the present invention is to prevent inconvenience such as distortion from occurring.
【０００４】[0004]
【課題を解決するための手段】前記目的を達成するため
に本発明の磁気ディスク装置の樹脂製シャッターは、磁
気ディスクを内蔵するとともにこの磁気ディスクの一部
を露出させる開口窓を有するシェルケースに摺動自在に
組み付けられ、このシェルケースの開口窓を開閉する磁
気ディスク装置の樹脂製シャッターにおいて、相対向す
る一対の板状部とこれら板状部の一端縁同志を一体に連
結する連結部とからなるとともに、前記板状部に前記シ
ェルケースの開口窓に重なる開口窓を開口形成してな
り、前記板状部の内面における開口窓の反連結部側の端
縁から板状部の反連結部側の端縁までの間の部分は、こ
の部分のほぼ全体に渡って板状部の反連結部側の端縁に
近付くに従い他方の板状部に近付く方向へ傾斜した傾斜
面としたものである。In order to achieve the above-mentioned object, a resin shutter of a magnetic disk drive according to the present invention is provided in a shell case having a built-in magnetic disk and having an opening window for exposing a part of the magnetic disk. In a resin shutter of a magnetic disk drive that is slidably assembled and opens and closes an opening window of the shell case, a pair of plate-shaped portions facing each other and a connection portion that integrally connects one end edges of these plate-shaped portions are provided. And an opening window overlapping the opening window of the shell case is formed in the plate-shaped portion, and the plate-shaped portion is not connected to the edge of the inner surface of the plate-shaped portion on the side opposite to the connection portion. The part up to the edge on the side of the part has an inclined surface that is inclined almost in the direction approaching the other part of the plate as it approaches the edge on the side opposite to the connecting part of the plate over almost the entire part. Is
【０００５】[0005]
【作用】前記構成により、磁気ディスク装置の樹脂製シ
ャッターを成形するに際して、このシャッター内に入り
離型時にその連結部側から反連結部側へ向けて抜かれる
コアが板状部の開口窓に入っている場合、離型時に、開
口窓の反連結部側の端縁から板状部の反連結部側の端縁
までの間のアンダーカットとなる横棧部で生じる抵抗力
が小さくなって、離型がスムーズに行われ、横棧部に変
形が生じることが防止される。According to the above construction, when a resin shutter of a magnetic disk drive is formed, a core which enters the shutter and is removed from the connecting portion side to the anti-connecting portion side when releasing the mold is formed in the opening window of the plate-like portion. If it is included, during release, the resistance generated by the undercut between the edge of the opening window on the side opposite to the connection portion and the edge of the plate-shaped portion on the side of the opposite connection portion is reduced. In addition, the release is smoothly performed, and the deformation of the horizontal ridge portion is prevented.
【０００６】[0006]
【実施例】以下、本発明の一実施例を添付図を用いて具
体的に説明する。図１ないし図４は本発明の一実施例を
示すものであり、これらの図において、21は磁気ディス
ク装置の一種であるマイクロフロッピーディスクの樹脂
製シャッターであり、このシャッター21は、前記図５に
示すような磁気ディスク３を内蔵したシェルケース２に
摺動自在に組み付けられ、その開口窓１を開閉するもの
である。そして、前記シャッター21は、相対向する一対
の長方形状の板状部22と、これら板状部22の一端縁同志
を一体に連結する細長い連結部23とにより断面ほぼコ字
形状に形成されている。なお、前記板状部22の厚さｔは
薄くて例えば0.35mmである。そして、これら板状部22に
シェルケース２の開口窓１に重なる長方形状の開口窓24
がそれぞれ開口形成されている。また、一方の板状部22
には連結部23に沿って、シャッター21をシェルケース２
に対して抜け止めするための一対の案内突起25が内面に
突出形成されているとともに、これら突起25の図示上方
位置にその成形に際しての型抜き用の孔26がそれぞれ形
成されている。さらに、連結部23の内面には一方の孔26
に臨ませて、シェルケース２に対してシャッター21を開
口窓１を閉じる方向へ付勢するばねを掛けるためのばね
掛け突起27が突出形成されている。また、前記両板状部
22の内面における開口窓24の周縁部には凹段部28がそれ
ぞれ形成されており、この凹段部28の周面は開口窓24か
ら離れるに従い他方の板状部22に近付く方向へ傾斜した
傾斜面29，30になっている。開口窓24の図示上側および
左右両側の傾斜面29が板状部22の内面に対してなす角度
は45°以下程度になっているが、開口窓24の図示下側の
傾斜面30が板状部22の内面に対してなす角度βは小さく
て３〜10°程度になっている。こうして、開口窓24の図
示下側すなわち反連結部23側の端縁から板状部22の図示
下側の端縁までの間の横棧部31は、その内面の全体が板
状部22の図示下側の端縁に近付くに従い他方の板状部22
に近付く方向へ傾斜した傾斜面30となっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIGS. 1 to 4 show one embodiment of the present invention. In these drawings, reference numeral 21 denotes a resin shutter of a micro floppy disk which is a kind of magnetic disk device. Is slidably mounted on a shell case 2 containing a magnetic disk 3 as shown in FIG. The shutter 21 is formed in a substantially U-shaped cross section by a pair of opposed rectangular plate-shaped portions 22 and an elongated connecting portion 23 that integrally connects one end edges of the plate-shaped portions 22 together. I have. The thickness t of the plate portion 22 is thin, for example, 0.35 mm. A rectangular opening window 24 overlapping the opening window 1 of the shell case 2 is formed on these plate-like portions 22.
Are respectively formed in the openings. Also, one plate-like portion 22
The shutter 21 along the connecting part 23 to the shell case 2
A pair of guide projections 25 are formed on the inner surface of the guide projections 25 so as to prevent the projections 25 from coming off. Further, one hole 26 is formed in the inner surface of the connecting portion 23.
A spring engaging projection 27 for applying a spring for urging the shutter 21 in the direction to close the opening window 1 with respect to the shell case 2 is formed so as to protrude. In addition, the two plate-shaped portions
A concave step portion 28 is formed at the peripheral portion of the opening window 24 on the inner surface of 22, and the peripheral surface of the concave step portion 28 is inclined in a direction approaching the other plate portion 22 as the distance from the opening window 24 increases. The slopes 29 and 30 are formed. The angle formed by the inclined surfaces 29 on the upper side and both left and right sides of the opening window 24 with respect to the inner surface of the plate-shaped portion 22 is about 45 ° or less, but the lower inclined surface 30 on the opening window 24 is plate-shaped. The angle β formed with respect to the inner surface of the portion 22 is as small as about 3 to 10 °. In this manner, the horizontal ridge portion 31 between the lower edge of the opening window 24 in the drawing, that is, the edge on the side opposite to the connecting portion 23 and the lower edge of the plate portion 22 in the drawing, is entirely formed on the inner surface of the plate portion 22. As it approaches the lower edge in the figure, the other plate-like portion 22
The inclined surface 30 is inclined in a direction approaching the plane.
【０００７】また、図１に示してある40は前記樹脂製シ
ャッター21を射出成形するための金型であり、この金型
40は、シャッター21の連結部23の外面に対応するキャビ
ティ面を形成する固定側金型部材41と可動側金型部材と
を備えており、さらに、この可動側金型部材は、シャッ
ター21の一方の板状部22の外面に対応するキャビティ面
を形成する第１割型42と、他方の板状部22の外面に対応
するキャビティ面を形成する第２割型43と、シャッター
21の内面に対応するキャビティ面を形成するコア44とか
らなっている。これらの固定側金型部材41、第１割型4
2、第２割型43およびコア44は、型開時矢印で示す方向
へ相対的に移動する。なお、前記固定側金型部材41にキ
ャビティへ開口するゲート45が形成されている。そし
て、前記両割型42，43のキャビティ面には、開口窓24の
外側の一部を形成するための突出部46がそれぞれ形成さ
れており、コア44の対応するキャビティ面には、開口窓
24の内側の凹段部28部分を形成するための突出部47がそ
れぞれ形成されている。A mold 40 for injection-molding the resin shutter 21 is shown in FIG.
40 includes a fixed mold member 41 and a movable mold member that form a cavity surface corresponding to the outer surface of the connecting portion 23 of the shutter 21, and the movable mold member further includes a movable mold member. A first split mold 42 forming a cavity surface corresponding to the outer surface of one plate-shaped portion 22; a second split mold 43 forming a cavity surface corresponding to the outer surface of the other plate-shaped portion 22;
21 and a core 44 forming a cavity surface corresponding to the inner surface. These fixed-side mold members 41, first mold 4
2, the second split mold 43 and the core 44 relatively move in the direction indicated by the arrow when the mold is opened. A gate 45 that opens to the cavity is formed in the fixed mold member 41. Projections 46 for forming a part of the outside of the opening window 24 are formed on the cavity surfaces of the split molds 42 and 43, respectively.
Protrusions 47 for forming a concave step 28 portion inside 24 are formed respectively.
【０００８】つぎに、前記構成についてその作用を説明
する。樹脂製シャッター21を射出成形するにあたって
は、型締後、ゲート45から固定側金型部材41、第１割型
42、第２割型43およびコア44間に形成されたキャビティ
に溶融樹脂が射出され、この樹脂の冷却、固化後、型開
とともに成形品であるシャッター21の離型が行われる。
この離型時、シャッター21内に入っているコア44は、横
棧部31を除く板状部22の内面を摺動しながらシャッター
21から図示下方向へ抜かれるが、その際、コア44の突出
部47がシャッター21の開口窓24内に入っているので、シ
ャッター21の横棧部31がコア44の抜き方向に対してアン
ダーカットとなり、無理抜きが行われることになる。し
かしながら、横棧部31の内面は、全体が傾斜面30になっ
ていて、この傾斜面30がコア44の抜き方向に対してなす
角度βが非常に小さくなっているので、離型時に横棧部
31で生じる抵抗力も非常に小さくなる。したがって、離
型がスムーズに行われるとともに、開口窓24の位置や大
きさを含めたシャッター21の寸法についての規格上横棧
部31の幅が小さくなっているとしても、横棧部31に変形
が生じるようなことはない。Next, the operation of the above configuration will be described. In injection molding of the resin shutter 21, after closing the mold, the fixed mold member 41 from the gate 45, the first split mold
The molten resin is injected into the cavity formed between the mold 42, the second split mold 43 and the core 44, and after cooling and solidification of the resin, the mold 21 is opened and the shutter 21, which is a molded product, is released.
At the time of this release, the core 44 contained in the shutter 21 slides on the inner surface of the plate-shaped portion 22 except for the horizontal portion 31 while the shutter 44 slides.
In this case, since the projecting portion 47 of the core 44 is in the opening window 24 of the shutter 21, the horizontal ridge portion 31 of the shutter 21 is underdrawn with respect to the removing direction of the core 44. It becomes a cut and forced removal is performed. However, the entire inner surface of the horizontal portion 31 is an inclined surface 30, and the angle β formed by the inclined surface 30 with respect to the direction in which the core 44 is removed is very small. Department
The resistance generated at 31 is also very small. Therefore, the mold release is performed smoothly, and even if the width of the horizontal ridge portion 31 is small in terms of the dimensions of the shutter 21 including the position and size of the opening window 24, the horizontal ridge portion 31 is deformed. Does not occur.
【０００９】以上のように前記実施例においては、板状
部22の内面における開口窓24の反連結部23側の端縁から
板状部22の反連結部23側の端縁までの間の全体を傾斜面
30としたことにより、この傾斜面30がコア44の抜き方向
に対してなす角度βを極力小さくでき、離型性が向上
し、横棧部31に歪みなどの不都合が生じない。As described above, in the above embodiment, the distance between the edge of the opening portion 24 on the inner surface of the plate portion 22 on the side opposite to the connection portion 23 and the edge of the plate portion 22 on the side opposite to the connection portion 23 is determined. Inclined whole
By setting the angle to 30, the angle β formed by the inclined surface 30 with respect to the direction in which the core 44 is pulled out can be made as small as possible, the releasability is improved, and inconvenience such as distortion does not occur in the horizontal ridge portion 31.
【００１０】なお、本発明は前記実施例に限定されるも
のではなく、例えばシャッターの開口窓の凹段部を省く
などの変形が可能である。The present invention is not limited to the above-described embodiment, but may be modified, for example, by omitting a concave step portion of an opening window of a shutter.
【００１１】[0011]
【発明の効果】本発明は、磁気ディスクを内蔵するとと
もにこの磁気ディスクの一部を露出させる開口窓を有す
るシェルケースに摺動自在に組み付けられ、このシェル
ケースの開口窓を開閉する磁気ディスク装置の樹脂製シ
ャッターにおいて、相対向する一対の板状部とこれら板
状部の一端縁同志を一体に連結する連結部とからなると
ともに、前記板状部に前記シェルケースの開口窓に重な
る開口窓を開口形成してなり、前記板状部の内面におけ
る開口窓の反連結部側の端縁から板状部の反連結部側の
端縁までの間の部分は、この部分のほぼ全体に渡って板
状部の反連結部側の端縁に近付くに従い他方の板状部に
近付く方向へ傾斜した傾斜面としたことにより、樹脂製
シャッターを成形するに際して、このシャッター内に入
り離型時にその連結部側から反連結部側へ向けて抜かれ
るコアが板状部の開口窓に入っている場合でも、離型時
に開口窓の反連結部側の端縁から板状部の反連結部側の
端縁までの間のアンダーカットとなる横棧部で生じる抵
抗力が小さくなって、離型性が向上するとともに、横棧
部に変形が生じるなどの不都合が防止される。According to the present invention, there is provided a magnetic disk drive which has a built-in magnetic disk and is slidably mounted on a shell case having an opening for exposing a part of the magnetic disk, and which opens and closes the opening of the shell case. In the resin shutter of the above, an opening window comprising a pair of plate-like portions facing each other and a connecting portion for integrally connecting one end edges of these plate-like portions together, and overlapping the plate-like portion with an opening window of the shell case. The portion of the inner surface of the plate-shaped portion between the edge of the opening window on the side opposite to the connection portion and the edge of the plate-shaped portion on the side opposite to the connection portion extends over substantially the entirety of this portion. When the resin-made shutter is formed by forming an inclined surface inclined in a direction approaching the other plate-shaped portion as it approaches the edge of the plate-shaped portion on the side opposite to the connecting portion, the resin-made shutter enters the shutter and is released when the mold is released. Communicating Even when the core pulled out from the part side toward the anti-connection part side is in the opening window of the plate-shaped part, at the time of release, from the edge of the opening window on the side of the anti-connection part side, The resistance generated in the horizontal portion that becomes an undercut between the edges is reduced, so that the releasability is improved and inconvenience such as deformation of the horizontal portion is prevented.
【図１】本発明の一実施例を示す成形時の断面図であ
る。FIG. 1 is a cross-sectional view during molding showing an embodiment of the present invention.
【図２】本発明の一実施例を示す図１における横棧部付
近の拡大図である。FIG. 2 is an enlarged view of the vicinity of a horizontal portion in FIG. 1 showing one embodiment of the present invention.
【図３】本発明の一実施例を示すシャッターの板状部内
面の正面図である。FIG. 3 is a front view of an inner surface of a plate-like portion of a shutter according to the embodiment of the present invention.
【図４】本発明の一実施例を示す図３のＡ−Ａ断面図で
ある。FIG. 4 is a sectional view taken along line AA of FIG. 3 showing one embodiment of the present invention.
【図５】従来例を示す磁気ディスク装置であるマイクロ
フロッピーディスクの分解斜視図である。FIG. 5 is an exploded perspective view of a micro floppy disk as a magnetic disk device showing a conventional example.
【図６】従来例を示す成形時の断面図である。FIG. 6 is a cross-sectional view during molding showing a conventional example.
【図７】従来例を示す図６における横棧部付近の拡大図
である。FIG. 7 is an enlarged view of the vicinity of a horizontal portion in FIG. 6 showing a conventional example.
【図８】従来例を示すシャッターの正面図である。FIG. 8 is a front view of a shutter showing a conventional example.
１ シェルケースの開口窓 ２ シェルケース ３ 磁気ディスク 21 樹脂製シャッター 22 板状部 23 連結部 24 板状部の開口窓 30 傾斜面 DESCRIPTION OF SYMBOLS 1 Opening window of shell case 2 Shell case 3 Magnetic disk 21 Resin shutter 22 Plate portion 23 Connecting portion 24 Window opening of plate portion 30 Slope
Claims (1)
気ディスクの一部を露出させる開口窓を有するシェルケ
ースに摺動自在に組み付けられ、このシェルケースの開
口窓を開閉する磁気ディスク装置の樹脂製シャッターに
おいて、相対向する一対の板状部とこれら板状部の一端
縁同志を一体に連結する連結部とからなるとともに、前
記板状部に前記シェルケースの開口窓に重なる開口窓を
開口形成してなり、前記板状部の内面における開口窓の
反連結部側の端縁から板状部の反連結部側の端縁までの
間の部分は、この部分のほぼ全体に渡って板状部の反連
結部側の端縁に近付くに従い他方の板状部に近付く方向
へ傾斜した傾斜面としたことを特徴とする磁気ディスク
装置の樹脂製シャッター。1. A resin shutter for a magnetic disk device which is slidably assembled to a shell case having a built-in magnetic disk and having an opening window exposing a part of the magnetic disk, and opening and closing the opening window of the shell case. In the above, a pair of plate-shaped portions facing each other and a connecting portion that integrally connects one end edges of these plate-shaped portions are integrally formed, and an opening window is formed in the plate-shaped portion so as to overlap an opening window of the shell case. The portion between the edge of the opening window on the inner surface of the plate-shaped portion on the side opposite to the connection portion and the edge of the plate-shaped portion on the side opposite to the connection portion is substantially a plate-shaped portion. A resin shutter for a magnetic disk drive, wherein the inclined surface is inclined in a direction approaching the other plate-like portion as approaching the edge on the side opposite to the connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3106099A JP2903510B2 (en) | 1991-05-10 | 1991-05-10 | Resin shutter for magnetic disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3106099A JP2903510B2 (en) | 1991-05-10 | 1991-05-10 | Resin shutter for magnetic disk drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04335279A JPH04335279A (en) | 1992-11-24 |
| JP2903510B2 true JP2903510B2 (en) | 1999-06-07 |
Family
ID=14425080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3106099A Expired - Lifetime JP2903510B2 (en) | 1991-05-10 | 1991-05-10 | Resin shutter for magnetic disk drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2903510B2 (en) |
-
1991
- 1991-05-10 JP JP3106099A patent/JP2903510B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04335279A (en) | 1992-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990222 |