JP2601981B2 - Synthetic resin shutter for micro floppy disk - Google Patents
Synthetic resin shutter for micro floppy diskInfo
- Publication number
- JP2601981B2 JP2601981B2 JP4736293A JP4736293A JP2601981B2 JP 2601981 B2 JP2601981 B2 JP 2601981B2 JP 4736293 A JP4736293 A JP 4736293A JP 4736293 A JP4736293 A JP 4736293A JP 2601981 B2 JP2601981 B2 JP 2601981B2
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- synthetic resin
- resin
- floppy disk
- plate
- 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
Description
【０００１】[0001]
【産業上の利用分野】この発明は、マイクロフロッピー
ディスクに用いる合成樹脂製のシャッターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin shutter used for a micro floppy disk.
【０００２】[0002]
【従来の技術】コンピュータやワードプロセッサの外部
記録媒体として用いられている3.5 インチ以下のマイク
ロフロッピーディスク（以下、フロッピーと省略する）
は、図８の如く硬質合成樹脂ケース２の内部に磁性材料
を塗った円盤状磁気シートＤを回動自在に収納するもの
で、ケース２は表裏側壁21，22の上部に嵌凹部23，24を
設けると共に、裏嵌凹部24の上端部に横長溝27を設け、
嵌凹部23，24に跨がってシャッター１を嵌挿し、該シャ
ッター１を横長溝27に沿って案内し、スプリング（図示
せず）にて一方に押圧されている。2. Description of the Related Art A micro-floppy disk of 3.5 inches or less used as an external recording medium of a computer or a word processor (hereinafter abbreviated as floppy)
As shown in FIG. 8, a disc-shaped magnetic sheet D coated with a magnetic material is rotatably accommodated in a hard synthetic resin case 2. The case 2 has fitting recesses 23, 24 in the upper portions of front and rear side walls 21, 22. In addition to providing a horizontal groove 27 at the upper end of the back fitting recess 24,
The shutter 1 is fitted over the fitting recesses 23 and 24, and the shutter 1 is guided along the elongated groove 27, and is pressed to one side by a spring (not shown).
【０００３】フロッピーのシャッターは、主にステンレ
スやアルミニウム等の金属材で形成されていたが、近
年、合成樹脂にて形成されるに至っている。合成樹脂製
シャッターは、図７の如く天壁1aの一縁より垂下する表
板1bと，他縁より垂下する裏板1cが相対設し、略下向き
にコ字型を成すもので、表板1bの右半分と裏板1cの左半
分にケース２の読書窓25，26より僅かに大きい覗窓３，
13を相対設し、天壁1aの左寄りにスプリングの係止鉤脚
７を垂設し、裏板1cの左右上端部にケース２の横長溝27
に挿入する爪片６，16を突設すると共に、爪片６，16の
成形に必要な金型孔５，15を穿設し、表板1bに文字Ｇを
印刷表示していた。（例えば実開昭64-52173号公報、特
開平2-83876 号公報）[0003] Floppy shutters are mainly made of metal materials such as stainless steel and aluminum, but have recently been made of synthetic resins. As shown in FIG. 7, the synthetic resin shutter has a front plate 1b hanging down from one edge of a top wall 1a and a back plate 1c hanging down from the other edge, and has a substantially downward U-shape. In the right half of 1b and the left half of the back plate 1c, the viewing windows 3, which are slightly larger than the reading windows 25, 26 of Case 2,
13, and a hook 7 of a spring is suspended from the left side of the top wall 1 a.
In addition, the nail pieces 6, 16 to be inserted into the hole are projected, and the mold holes 5, 15 necessary for molding the nail pieces 6, 16 are formed, and the letter G is printed and displayed on the front plate 1b. (For example, Japanese Utility Model Application Laid-Open No. 64-52173, Japanese Patent Application Laid-Open No. 2-83876)
【０００４】シャッターはフロッピーの取り出し状態に
おいて、ケースの読書窓を表裏板にて塞ぎ、読書窓に露
出する磁気シート部を外部より保護し、フロッピーを外
部記録装置に挿入した際、スプリングに対抗して摺動
し、覗窓がケース読書窓と合致し、磁気シートに対する
読みだしと書込みを可能にする。一方、合成樹脂製シャ
ッターのキャビティＣは、図５（Ｂ）と図６（Ｂ）の如
くシャッター１の表裏板1b，1cが可動金型Ａの型締め方
向に対し水平となるように形成されていた。[0004] The shutter closes the reading window of the case with the front and back plates when the floppy is taken out, protects the magnetic sheet exposed from the reading window from the outside, and opposes the spring when the floppy is inserted into the external recording device. Sliding, the viewing window matches the case reading window, allowing reading and writing to the magnetic sheet. On the other hand, the cavity C of the synthetic resin shutter is formed so that the front and back plates 1b and 1c of the shutter 1 are horizontal with respect to the mold clamping direction of the movable mold A as shown in FIGS. 5B and 6B. I was
【０００５】[0005]
【発明が解決しようとする課題】シャッターはケースに
嵌挿する都合上、表裏板の肉厚が僅か0.3mm 程度の薄肉
に制約を受けざるを得ないし、構造上、裏板に爪片と金
型孔を形成しなければない。そのため、合成樹脂製シャ
ッターを高速で射出成形すると、表裏板に流れる樹脂量
に差が生じたり、圧力差が生じ、それにより表裏板の間
に寸法誤差や偏肉が生じる問題点があると共に、バリが
出たり反りが生じる等の問題点もあった。The thickness of the front and back plates must be limited to a small thickness of about 0.3 mm for the purpose of fitting the shutter into the case. A mold cavity must be formed. Therefore, when a synthetic resin shutter is injection-molded at a high speed, there is a problem that a difference occurs in the amount of resin flowing between the front and back plates and a pressure difference occurs, thereby causing a dimensional error and uneven thickness between the front and back plates, and causing burrs. There were also problems such as occurrence of warpage and warpage.
【０００６】更にシャッターの表裏板に流れる樹脂量や
樹脂圧に差が生じると、金型内を流れる樹脂に剪断力を
受けたり、樹脂の分子が引き伸ばされて固化し、それが
残留応力として残り、シャッターを高温環境において使
用したり保管する間に、経時的に寸法変化したり変形す
る問題点もあった。Further, if there is a difference between the amount of resin flowing on the front and back plates of the shutter and the resin pressure, the resin flowing in the mold receives a shearing force, or the resin molecules are stretched and solidified, and this remains as residual stress. Also, there has been a problem that the dimensions change or deform over time while the shutter is used or stored in a high-temperature environment.
【０００７】又シャッターの表裏板を射出成形金型の型
締め方向に対し水平に形成すると、表裏板に流れる樹脂
が地球の重力を受けやすくなると言う問題点もある。そ
こでこの発明は、従来技術の有するこのような問題点に
鑑みてなされたものであり、その目的とするところは、
成形寸法が一定でしかも機械的強度も備えた合成樹脂製
シャッターを提供することにある。Further, if the front and back plates of the shutter are formed horizontally with respect to the direction of clamping of the injection mold, there is a problem that the resin flowing on the front and back plates is easily affected by the gravity of the earth. Then, this invention was made in view of such a problem which a prior art has, and the place of the object is
An object of the present invention is to provide a synthetic resin shutter having a fixed molding size and mechanical strength.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明のシャッターは、シャッター表板の外面にシ
ャッター裏板とバランスを保つ凹部を設け、シャッター
の表板と裏板に流れる樹脂量、及び樹脂圧を同様にし、
表裏板を高精度に形成し得るようにしたものである。In order to achieve the above object, a shutter according to the present invention is provided with a concave portion for maintaining balance with a shutter back plate on an outer surface of a shutter front plate, and a resin flowing between the shutter front plate and the back plate. Amount and resin pressure
The front and back plates can be formed with high precision.
【０００９】[0009]
【実施例】先ず本発明による合成樹脂製シャッターの構
造を図１に基づき説明すれば、シャッター１の基本構造
は従来と同様に、天壁1aの一縁に表板1bを、他縁に裏板
1cを垂設し、表裏板1b，1cにケース２の読書窓25，26よ
り１回り大きい覗窓３，13を一方に片寄って穿設する一
方、裏板1cの左右上部にケース裏凹部24の横長溝27に挿
入する爪片６，16と、該爪片６，16の成形に必要な金型
孔５，15を設け、天壁1aの下にケース２のスプリングに
係止する鉤脚７を突設している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the structure of a synthetic resin shutter according to the present invention will be described with reference to FIG. 1. Board
1c, the viewing windows 3 and 13 which are one size larger than the reading windows 25 and 26 of the case 2 are formed in the front and back plates 1b and 1c. Claw pieces 6, 16 to be inserted into the horizontally long grooves 27, and mold holes 5, 15 required for forming the claw pieces 6, 16 are provided, and hook legs which are engaged with springs of the case 2 under the top wall 1a. 7 are protruding.
【００１０】次に本発明シャッターの特徴を図２に基づ
き説明すれば、シャッター表板1bの外面に、シャッター
裏板1cとバランスを保つ凹部４を設け、表板1bと裏板1c
に流れる樹脂量を同様にすると共に、樹脂圧も同様にす
ることに独自の工夫を凝らしたものである。シャッター
裏板1cの外面に設ける凹部４の凹部深さｔは、裏板厚さ
Ｔの１／２以下に形成するもので、裏板1cの上部より下
部まで連続的に形成することも、又部分的に分割形成す
ることも可能である。Next, the features of the shutter of the present invention will be described with reference to FIG. 2. A concave portion 4 for keeping balance with the shutter back plate 1c is provided on the outer surface of the shutter front plate 1b, and the front plate 1b and the back plate 1c
In addition to the same amount of resin flowing through the resin, the original pressure was applied to the same resin pressure. The recess depth t of the recess 4 provided on the outer surface of the shutter back plate 1c is formed to be 1/2 or less of the back plate thickness T, and may be formed continuously from the upper portion to the lower portion of the back plate 1c. It is also possible to form a part separately.
【００１１】凹部４の形成範囲と凹部深さｔを種々変
え、そのシャッター１を高速で射出成形した所、凹部４
の形成範囲と凹部深さｔの関係は以下の通りであった。 凹部深さｔを浅くする程、凹部４を広範囲に形成す
る必要があった。 凹部深さｔを裏板厚さＴの１／２以上にすると、凹
部４より下方の裏板1c下部が変形したり、偏肉等が生じ
た。 図３の如く凹部４にて文字や記号、或いは模様等を
表現しても、同様の目的を達成することが判明した。When the range of formation of the recess 4 and the depth t of the recess are varied, and the shutter 1 is injection-molded at high speed,
The relationship between the formation range and the depth t of the concave portion was as follows. As the depth t of the concave portion becomes smaller, the concave portion 4 needs to be formed in a wider range. When the depth t of the concave portion was set to １ ／ or more of the thickness T of the back plate, the lower portion of the back plate 1c below the concave portion 4 was deformed or the thickness was uneven. It has been found that the same object can be achieved by expressing characters, symbols, patterns, or the like in the recess 4 as shown in FIG.
【００１２】本発明シャッターのキャビティＣを可動金
型Ａに形成する場合、図５（Ａ）と図６（Ａ）、及び図
４の如くシャッター１の表板1bと裏板1cが型締め方向に
対して垂直となるように形成すると共に、シャッター表
板1bの外面を左スライドコアＢ1 にて、又シャッター裏
板1cの外面を右スライドコアＢ2 にて形成し得るように
し、右スライドコアＢ2 に凹部形成凸部ｂを設けるもの
である。シャッター１は少なくとも弾性を有するポリプ
ロピレン、ポリアセタール、ジュラコン等の合成樹脂で
形成することが好ましい。When the cavity C of the shutter of the present invention is formed in the movable mold A, as shown in FIGS. 5A and 6A and FIG. 4, the front plate 1b and the back plate 1c of the shutter 1 are in the clamping direction. And the outer surface of the shutter front plate 1b can be formed by the left slide core B1, and the outer surface of the shutter back plate 1c can be formed by the right slide core B2. Is provided with a concave portion forming convex portion b. The shutter 1 is preferably formed of at least an elastic synthetic resin such as polypropylene, polyacetal, and Duracon.
【００１３】本発明のシャッターは上記構造の如く、シ
ャッター表板1bの外面に裏板1cとバランスを保つ凹部４
を形成するものであるから、シャッター１の表板1bと裏
板1cに流れる樹脂量や樹脂圧が同様になる。その結果、
シャッター１を高精度に安定して高速で射出成形するこ
とが可能となる。As described above, the shutter of the present invention has a concave portion 4 on the outer surface of the shutter front plate 1b for maintaining balance with the back plate 1c.
Therefore, the amount of resin and the resin pressure flowing in the front plate 1b and the back plate 1c of the shutter 1 are the same. as a result,
The shutter 1 can be injection-molded at high speed with high accuracy and stability.
【００１４】本発明のシャッターは、従来シャッターと
同様に、ケース表側壁21の嵌凹部23と裏側壁22の嵌凹部
24に跨がって嵌挿し、シャッター裏板1cの爪片６，16を
ケース裏側壁22の横長溝27に挿入し、横長溝27と嵌凹部
23，24の範囲内で摺動可能になると共に、シャッター１
の鉤脚７にスプリングを係止し、スプリングにてシャッ
ター１を一方に押圧せしめ、ケース２の読書窓25，26を
塞ぐものである。As with the conventional shutter, the shutter of the present invention has a fitting recess 23 of the case front side wall 21 and a fitting recess of the rear side wall 22.
24, and insert the claw pieces 6 and 16 of the shutter back plate 1c into the horizontally long grooves 27 of the case back side wall 22 to fit the horizontally long grooves 27 and the fitting recesses.
It becomes slidable within the range of 23, 24 and shutter 1
The spring 1 is locked to the hook 7 and the shutter 1 is pressed to one side by the spring, thereby closing the reading windows 25 and 26 of the case 2.
【００１５】[0015]
【発明の効果】本発明による合成樹脂製シャッターは上
記のとおりであるから、次に記載する効果を奏する。シ
ャッター表板の外面に、シャッター裏板とバランスを保
つ凹部を形成しているため、表裏板に流れる樹脂量や樹
脂圧等が同様になる。その結果、寸法の一定した高精度
のシャッターを高速で射出成形することが可能となる。
しかも凹部はシャッター表裏板の形状的な相違と、その
相違により生じる表裏板に流れる樹脂量や樹脂圧等を考
慮する以外、シャッター裏板の外面に適宜形成し得るの
で、凹部にて文字や記号、或いは模様等も表現し得る。Since the synthetic resin shutter according to the present invention is as described above, the following effects can be obtained. Since a concave portion for maintaining balance with the shutter back plate is formed on the outer surface of the shutter front plate, the amount of resin flowing into the front and back plates, the resin pressure, and the like become the same. As a result, a high-precision shutter having a fixed size can be injection-molded at a high speed.
Moreover, the recess can be appropriately formed on the outer surface of the shutter back plate, except for the shape difference between the shutter front and back plates and the amount of resin and resin pressure flowing through the front and back plates caused by the difference. Alternatively, a pattern or the like can be expressed.
【図１】の（Ａ）（Ｂ）（Ｃ）本発明シャッターの正面
図と側面図、及び背面図である。1A, 1B, and 1C are a front view, a side view, and a rear view of a shutter of the present invention.
【図２】の（Ａ）（Ｂ）図１のＸ−Ｘ線矢視とＹ−Ｙ線
矢視の拡大断面図である。FIGS. 2A and 2B are enlarged cross-sectional views taken along lines XX and YY of FIG.
【図３】の（Ａ）（Ｂ）凹部の形成例を示す正面図であ
る。FIGS. 3A and 3B are front views showing examples of forming a concave portion.
【図４】本発明シャッターの形成例を示す金型の平面図
である。FIG. 4 is a plan view of a mold showing an example of forming a shutter of the present invention.
【図５】の（Ａ）（Ｂ）本発明と従来のシャッターキャ
ビティ形成例を示す金型の横断面図である。FIGS. 5A and 5B are cross-sectional views of a mold showing the present invention and a conventional example of forming a shutter cavity.
【図６】の（Ａ）（Ｂ）その側面図である。6 (A) and 6 (B) are side views thereof.
【図７】の（Ａ）（Ｂ）（Ｃ）（Ｄ）従来シャッターの
正面図と背面図である。7A, 7B, 7C, and 7D are a front view and a rear view of a conventional shutter.
【図８】の（Ａ）（Ｂ）マイクロフロッピーディスクの
正面図と背面図である。FIGS. 8A and 8B are a front view and a rear view of a micro floppy disk.
１ シャッター、1a 天壁、1b 表板、1c 裏板 ２ ケース ３，13…覗窓 ４ 凹部 ５，15 金型孔 ６，16 爪片 ７ 鉤脚 21，22 ケース側壁、23，24 嵌凹部、25，26 読書
窓、27 横長溝 Ａ 可動金型、Ｂ1,Ｂ2 スライドコア、ｂ 凹部形成
凸部 Ｃ キャビティ、Ｄ 磁気シート、Ｆ フロッピー、Ｇ
文字 Ｔ 裏板厚さ、ｔ 凹部深さDESCRIPTION OF SYMBOLS 1 Shutter, 1a top wall, 1b top plate, 1c back plate 2 Case 3,13 ... Viewing window 4 Concave part 5,15 Mold hole 6,16 Claw piece 7 Hook leg 21,22 Case side wall, 23,24 Fitting concave part, 25, 26 reading window, 27 horizontal groove A movable mold, B1, B2 slide core, b concave forming convex part C cavity, D magnetic sheet, F floppy, G
Letter T Back plate thickness, t recess depth
Claims (1)
（２）の表側壁(21)と裏側壁(22)の上部に跨がって嵌挿
し、表裏側壁の読書窓（25,26)を摺動により開閉するシ
ャッター（１）において、シャッター表板（1b）の外面
に、シャッター裏板（1c）とバランスを保つ凹部（４）
を設け、シャッターの表板と裏板に流れる樹脂量、及び
樹脂圧を同様にし、表裏板を高精度に形成し得るように
したことを特徴とするマイクロフロッピーディスク用合
成樹脂製シャッター。1. A micro-floppy disk case (2) is fitted over the upper part of the front side wall (21) and the back side wall (22), and the reading windows (25, 26) on the front and back side walls are opened and closed by sliding. In the shutter (1), on the outer surface of the shutter front plate (1b), a concave portion (4) that keeps balance with the shutter back plate (1c).
A synthetic resin shutter for a micro floppy disk, characterized in that the amount of resin flowing through the front plate and the back plate of the shutter and the resin pressure are made the same so that the front and back plates can be formed with high precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4736293A JP2601981B2 (en) | 1993-02-12 | 1993-02-12 | Synthetic resin shutter for micro floppy disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4736293A JP2601981B2 (en) | 1993-02-12 | 1993-02-12 | Synthetic resin shutter for micro floppy disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06243631A JPH06243631A (en) | 1994-09-02 |
| JP2601981B2 true JP2601981B2 (en) | 1997-04-23 |
Family
ID=12773008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4736293A Expired - Lifetime JP2601981B2 (en) | 1993-02-12 | 1993-02-12 | Synthetic resin shutter for micro floppy disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601981B2 (en) |
-
1993
- 1993-02-12 JP JP4736293A patent/JP2601981B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06243631A (en) | 1994-09-02 |
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