JPS6117281A - Magnetic recording use magnetic disk jacket having electromagnetic wave noise shielding property - Google Patents
Magnetic recording use magnetic disk jacket having electromagnetic wave noise shielding propertyInfo
- Publication number
- JPS6117281A JPS6117281A JP13824484A JP13824484A JPS6117281A JP S6117281 A JPS6117281 A JP S6117281A JP 13824484 A JP13824484 A JP 13824484A JP 13824484 A JP13824484 A JP 13824484A JP S6117281 A JPS6117281 A JP S6117281A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- electromagnetic wave
- jacket
- magnetic
- magnetic recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電子計算機１周辺端末機器等に用いられる電磁
波ノイズ遮蔽性をもった磁気記録用磁気ディスクジャケ
ットに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic disk jacket for magnetic recording, which has electromagnetic noise shielding properties and is used in electronic computers, peripheral terminal equipment, and the like.
従来の技術
従来、此の種磁気ディスクジャケットの一例として第７
図に示すものがあった。図におりて、（１）は磁気ディ
スクでデータを記録する本体である。Prior Art Conventionally, as an example of this kind of magnetic disk jacket, the seventh
There was something shown in the figure. In the figure, (1) is the main body that records data on a magnetic disk.
（２）は磁気ディスクを保護するジャケット、 （３）
は磁気ディスク（１）の表面を払拭し清浄に保つと共に
、磁気ディスク（１ンの回転に伴う摩、擦を軽減するた
め磁気ディスクジャケットｃ２）の内面に設けられた繊
維組織体である。(2) is a jacket that protects the magnetic disk; (3)
is a fibrous tissue body provided on the inner surface of the magnetic disk (magnetic disk jacket c2) to wipe the surface of the magnetic disk (1) and keep it clean, and to reduce friction and friction caused by the rotation of the magnetic disk (1).
通常、磁気ディスク＜１）は厚さ７ｊミクロンのポリエ
ステルフィルムの片面又は両面に抗磁力／Ｓθ乃至！θ
θθオルステッドの磁性酸化鉄、又はコバルト処理を施
した磁性酸化鉄、又は磁性酸化クロムを均一な厚さ１〜
５ミクロンに全面塗付しである。Typically, a magnetic disk <1) is coated on one or both sides of a 7j micron thick polyester film with coercive force/Sθ~! θ
θθ Orsted magnetic iron oxide, cobalt-treated magnetic iron oxide, or magnetic chromium oxide with a uniform thickness of 1~
The entire surface is coated to 5 microns.
一方、磁気ディスクジャケットハ塩化ビニル樹脂又は他
の熱可塑性樹脂を厚さ２０９〜２５０ミクロンのシート
状（４）にして作られているが電磁波ノイズ遮蔽性を有
してｈない。On the other hand, although the magnetic disk jacket is made of vinyl chloride resin or other thermoplastic resin in the form of a sheet (4) with a thickness of 209 to 250 microns, it does not have electromagnetic noise shielding properties.
発明が解決しようとする問題点
電子計算機、周辺端末機器等は近年その有用性から社会
に広く普及している。これら機器に用いられる磁気記録
用磁気ディスクには、記録したい情報信号は記録ヘッド
を介して磁性−膜中の微細な磁石（磁性粒子）が連続的
に並んだ状態として蓄えられる。従って既にデータが記
録された磁気ディスクが不用意にも他の電気機器及び磁
気を発生するような機器から発生する電磁波ノイズにさ
らされると磁気ディスク上に記録されたデータは消滅、
又は重大な障害を受けることになる。Problems to be Solved by the Invention In recent years, electronic computers, peripheral terminal devices, etc. have become widespread in society due to their usefulness. On magnetic recording disks used in these devices, information signals to be recorded are stored in a continuous array of fine magnets (magnetic particles) in a magnetic film via a recording head. Therefore, if a magnetic disk on which data has already been recorded is inadvertently exposed to electromagnetic noise generated by other electrical equipment or equipment that generates magnetism, the data recorded on the magnetic disk will disappear.
or suffer serious injury.
本発明はこのような磁気記録用磁気ディスクに記録され
たデータの消滅又は重大な障害を避けるため、電磁波ノ
イズ遮蔽性を有する磁気記録用磁気ディスクジャケット
を提供しようとするものである。The present invention aims to provide a magnetic recording magnetic disk jacket having electromagnetic noise shielding properties in order to avoid data loss or serious damage recorded on such magnetic recording magnetic disks.
問題点を解決する゛ための手段
本発明は電子計算機１周辺端末機器等に用いられる磁気
記録用磁気ディスクの、塩化ビニル樹脂又は他の熱可塑
性樹脂材（４）で構成される磁気ディスクジャケット（
２）に、導電性を有する電磁波遮蔽材（５）を、塗付、
メッキ貼着又はジャケット成形材の合成樹脂中に混在せ
しめる等の手段により皮膜、層状（６）として付与せし
めてジャケットを形成したことにより、外部かムの電磁
波ノイズが減衰せしめられ、遮蔽効果が発揮されるもの
である。Means for Solving the Problems The present invention provides a magnetic disk jacket (4) made of vinyl chloride resin or other thermoplastic resin material (4) for magnetic recording magnetic disks used in electronic computers, peripheral terminal equipment, etc.
2), applying a conductive electromagnetic wave shielding material (5),
By applying it as a film or layer (6) by plating or mixing it into the synthetic resin of the jacket molding material to form the jacket, the electromagnetic noise of the external cam is attenuated and a shielding effect is achieved. It is something that will be done.
電磁波ノイズの遮蔽性の効果は、電磁波ノイズ発生源の
強さと磁気記録用磁気ディスクとの距離によって異なる
が、最低ｌθデシベル以上の遮蔽性が必要である。通常
、遮蔽性の効果は式（１）で表わされる。The effectiveness of electromagnetic noise shielding varies depending on the strength of the electromagnetic noise source and the distance from the magnetic recording disk, but shielding of at least lθ decibels or more is required. Usually, the shielding effect is expressed by equation (1).
以下１本発明を実施例につき説明する。The present invention will be explained below with reference to examples.
実施例１
導電性を肩する電磁波遮蔽材として導電性塗料を用いる
と好適であるが、この場合常温乾燥型アクリル樹脂ｌ液
タイプ塗料の中に金属ニッケルの粒子を均一に分散させ
たものを磁気記録用磁気ディスクジャケットに使用され
る塩化ビニル樹脂の片面又は両面に通常用Ａられる方法
で均一に塗布し乾燥する。溶剤が揮発して塗膜（６）が
形成される時、ニッケル粒子相互の接触がおこって導電
性が発現する。比抵抗ｊ Ｘ ’ Ｏｒ′Ｌ−ｏｎを発
現するような量のニッケル粒子を添加した塗料を塗布し
たものでは電磁波の減衰特性は３θ〜６０デシベルの磁
気ディスクジャケットが得られた。Example 1 It is preferable to use a conductive paint as an electromagnetic wave shielding material that has conductivity. It is uniformly coated on one or both sides of a vinyl chloride resin used for recording magnetic disk jackets by a conventional method and dried. When the solvent evaporates and a coating film (6) is formed, the nickel particles come into contact with each other and develop conductivity. A magnetic disk jacket having an electromagnetic wave attenuation characteristic of 3θ to 60 decibels was obtained by applying a coating material containing nickel particles in an amount such that the resistivity jX'Or'L-on was expressed.
実施例２
磁気ディスクジャケットを導電性プラスチックで形成す
る。此の場合は磁気ディスクジャケットに用いられる塩
化ビニル樹脂（４）に予め金属箔又は金属繊維又は金属
粒子（７）又はカーボンブラックの込づれか、又はある
組合せで混入しておいてからシート状に成型し、これか
らジャケットを形成する。アルミニウム箔を混入した塩
化ビニル樹脂で比抵抗ｌθ°Ｑ−―を発現し、減衰特性
３０〜Ｓθデシベルの磁気ディスクジャケットが得られ
た。Example 2 A magnetic disk jacket is made of conductive plastic. In this case, the vinyl chloride resin (4) used for the magnetic disk jacket is mixed in advance with metal foil, metal fibers, metal particles (7), or carbon black, or a certain combination, and then formed into a sheet. Mold and form a jacket from this. The vinyl chloride resin mixed with aluminum foil exhibited a specific resistance lθ°Q--, and a magnetic disk jacket with a damping characteristic of 30 to Sθ decibels was obtained.
実施例３
金属溶射により電磁波遮蔽材を付与する例として、磁気
ディスクジャケット用にシート状に成型された塩化ビニ
ル樹脂に、ワイヤー状の亜鉛をガス又は電気アークで溶
融し、これに圧縮空気を噴射して微粒子化した後、厚さ
ｌθθ〜／３θミクロンに均一にスプレーする。このよ
うにして減衰特性６θ〜りθデシベルの磁気ディスクジ
ャケットが得られた。Example 3 As an example of applying an electromagnetic wave shielding material by metal spraying, wire-shaped zinc was melted with gas or electric arc on a sheet of vinyl chloride resin for a magnetic disk jacket, and compressed air was injected into it. After the particles are made into fine particles, they are sprayed uniformly to a thickness of lθθ to /3θ microns. In this way, a magnetic disk jacket with a damping characteristic of 6.theta. to .theta. decibels was obtained.
実施例久
乾式鍍金により磁気ディスクジャケットに電磁波遮蔽材
を付与する場合、乾式鍍金は真空中で金属粒子を作り出
し、プラスチック基体に叩きつける方法であって、真空
蒸着、スパッタリング、イオンブレーティングなどがあ
るが、この発明の実施例として真空蒸着による方法を説
明すると、良好な電導性を石するアルミニウムを用いて
、磁気ディスクジャケット用にシート状に成型された塩
化ビニル樹脂に通常の蒸着装置を用すて蒸着する。蒸着
膜厚２ミクロンの場合比抵抗として３ｊＸ１０ Ω・画
が得られ減衰特性コθ〜ゲθデシベルの磁気ディスクジ
ャケットが得られた。Example When applying an electromagnetic wave shielding material to a magnetic disk jacket by dry plating, dry plating is a method of creating metal particles in a vacuum and slamming them onto a plastic substrate. As an example of the present invention, a method using vacuum evaporation is described. Aluminum, which has good conductivity, is used to coat vinyl chloride resin molded into a sheet for a magnetic disk jacket, using a normal evaporation device. Deposit. In the case of a deposited film thickness of 2 microns, a specific resistance of 3j×10 Ω·m was obtained, and a magnetic disk jacket with an attenuation characteristic of θ to θ decibels was obtained.
実施例５
実施例■に対し、湿式鍍金による場合は磁気ディスクジ
ャケット用としてシート状に成形された゛塩化ビニル樹
脂表面を通常用いられる方法で活性化処理を行いニッケ
ル塩を有する還元浴中に浸漬すると塩゛化ビニル樹脂表
面にニッケルが沈着する。表面の比抵抗は！；ｘ１０
Ω・偲で減衰特性は３０〜乙θデシベルの磁気ディス
クジャケットが得られる。Example 5 In contrast to Example 2, when wet plating is used, the surface of a vinyl chloride resin formed into a sheet for a magnetic disk jacket is activated by a commonly used method and immersed in a reducing bath containing nickel salt. Nickel is deposited on the surface of vinyl chloride resin. What is the specific resistance of the surface? ;x10
A magnetic disk jacket with a damping characteristic of 30 to θ decibels can be obtained at Ω·偲.
実施例ム
予め別の方法で作製された１ミクロンのアルミニウム箔
又は２０ミクロン、長さ２３ ｍｘのアルミニウム繊維
を産量比で３θ％以上含有した金属紙を、磁気ディスク
ジャケット用にシート状に成型された塩化ビニル樹脂の
片面に均一に接着剤を用いて接着する。かくして得られ
た磁気ディスクジャケットの比抵抗は／ Ｘ ／ Ｏｎ
−ｃｍで減衰特性３０〜乙θデシベルが得られた。Example: A metal paper containing 3θ% or more of aluminum foil of 1 micron or 20 micron, 23 mx length aluminum fiber in production ratio, which was prepared in advance by another method, was formed into a sheet for a magnetic disk jacket. Adhere it evenly to one side of the vinyl chloride resin using adhesive. The specific resistance of the magnetic disk jacket thus obtained is /X/On
Attenuation characteristics of 30 to θ decibels were obtained at −cm.
以上説明したように１本発明によれば磁気記録用磁気デ
ィスクジャケットに導電性材料を層、皮膜又は相互に接
触可能な粒子状として含ませる等によって付与せしめで
あるから、不用意にも他の電気、電子機器及び磁気を発
生する機器から発生する電磁波ノイズにさらされること
があっても、この導電体の通過に際し電磁波が減衰され
、内部の磁気記録用磁気ディスクに記録されたデータの
消滅、又は憲太な支障を防止でき、より一層安全に保護
できる有益な発明である。As explained above, according to the present invention, the conductive material is applied to the magnetic disk jacket for magnetic recording by including it in the form of a layer, film, or mutually contactable particles. Even if you are exposed to electromagnetic wave noise generated by electricity, electronic equipment, or equipment that generates magnetism, the electromagnetic waves will be attenuated as they pass through the conductor, causing data recorded on the internal magnetic recording disk to disappear. Or, it is a useful invention that can prevent major problems and provide even safer protection.
第１図は本発明による磁気記録用磁気ディスクジャケッ
トの一例を示す表面図で一部を切断する、第λ図同裏面
図、第３図は本発明の磁気ディスクジャケットを成型す
るシートの数例を示す一部 、拡大断面図、第７図は従
来のこの種磁気ディスクジャケットの一例を示す表面図
で一部を切断する。
（、し・磁気記録用磁気ディスク、（２）・・磁気ンイ
スクジャケット、（４）・・ジャケット成型用合成樹脂
シート＋ ＋５３・・誓磁波蓮蔽材、（６）・・電磁波
遮蔽皮膜又は層、（７）・・金属粒子。
第１図 第１図
第３図
７・・金属粒子
第４図FIG. 1 is a front view, partially cut away, showing an example of a magnetic disk jacket for magnetic recording according to the present invention, FIG. FIG. 7 is a partially cut away surface view showing an example of a conventional magnetic disk jacket of this type. (, magnetic disk for magnetic recording, (2)... magnetic disc jacket, (4)... synthetic resin sheet for jacket molding + +53... magnetic wave shielding material, (6)... electromagnetic wave shielding film or Layer, (7)...Metal particles. Fig. 1 Fig. 1 Fig. 3 Fig. 7... Metal particles Fig. 4
Claims (1)
用磁気ディスクのジャケットに、導電性を有する電磁波
遮蔽材を付与せしめたことを特徴とする電磁波ノイズ遮
蔽性を有する磁気記録用磁気ディスクジャケット。 ２、電磁波遮蔽材として導電性塗料を用いたことを特徴
とする特許請求の範囲第１項記載の磁気記録用磁気ディ
スクジャケット。 ３、電磁波遮蔽材としてジャケット本体を導電性プラス
チックで構成したことを特徴とする特許請求の範囲第１
項記載の磁気記録用磁気ディスクジャケット。 ４、電磁波遮蔽材として金属溶射皮膜を用いたことを特
徴とする特許請求の範囲第１項記載の磁気記録用磁気デ
ィスクジャケット。 ５、電磁波遮蔽材として乾式鍍金を用いたことを特徴と
する特許請求の範囲第１項記載の磁気記録用磁気ディス
クジャケット。 ６、電磁波遮蔽材として湿式鍍金を用いたことを特徴と
する特許請求の範囲第１項記載の磁気記録用磁気ディス
クジャケット。 ７、電磁波遮蔽材として金属箔を用いたことを特徴とす
る特許請求の範囲第１項記載の磁気記録用磁気ディスク
ジャケット。 ８、電磁波遮蔽材として金属紙を用いたことを特徴とす
る特許請求の範囲第１項記載の磁気記録用磁気ディスク
ジャケット。 ９、電磁波遮蔽材として金属の真空蒸着を用いたことを
特徴とする特許請求の範囲第１項記載の磁気記録用磁気
ディスクジャケット。[Claims] 1. A magnetic material having electromagnetic noise shielding properties, characterized in that a conductive electromagnetic wave shielding material is applied to the jacket of a magnetic disk for magnetic recording used in computers, peripheral terminal equipment, etc. Magnetic disc jacket for recording. 2. The magnetic disk jacket for magnetic recording according to claim 1, characterized in that a conductive paint is used as the electromagnetic wave shielding material. 3. Claim 1, characterized in that the jacket body is made of conductive plastic as an electromagnetic wave shielding material.
A magnetic disk jacket for magnetic recording as described in Section 1. 4. The magnetic disk jacket for magnetic recording according to claim 1, characterized in that a metal spray coating is used as the electromagnetic wave shielding material. 5. The magnetic disk jacket for magnetic recording according to claim 1, characterized in that dry plating is used as the electromagnetic wave shielding material. 6. The magnetic disk jacket for magnetic recording according to claim 1, characterized in that wet plating is used as the electromagnetic wave shielding material. 7. The magnetic disk jacket for magnetic recording according to claim 1, characterized in that metal foil is used as the electromagnetic wave shielding material. 8. A magnetic disk jacket for magnetic recording according to claim 1, characterized in that metal paper is used as the electromagnetic wave shielding material. 9. A magnetic disk jacket for magnetic recording according to claim 1, characterized in that a vacuum-deposited metal is used as the electromagnetic wave shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13824484A JPS6117281A (en) | 1984-07-03 | 1984-07-03 | Magnetic recording use magnetic disk jacket having electromagnetic wave noise shielding property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13824484A JPS6117281A (en) | 1984-07-03 | 1984-07-03 | Magnetic recording use magnetic disk jacket having electromagnetic wave noise shielding property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6117281A true JPS6117281A (en) | 1986-01-25 |
Family
ID=15217438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13824484A Pending JPS6117281A (en) | 1984-07-03 | 1984-07-03 | Magnetic recording use magnetic disk jacket having electromagnetic wave noise shielding property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117281A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992011489A1 (en) * | 1990-12-19 | 1992-07-09 | Integral Peripherals, Inc. | Shock absorbent mounting for disk drive |
| US5161770A (en) * | 1990-12-19 | 1992-11-10 | Integral Peripherals, Inc. | Shock absorbent mounting arrangement for disk drive or other component |
| US5379171A (en) * | 1991-09-25 | 1995-01-03 | Integral Peripherals | Microminiature hard disk drive |
| US5414517A (en) * | 1992-05-01 | 1995-05-09 | Agency Of Industrial Science & Technology | Method and apparatus for measuring the shape of glossy objects |
| US5426562A (en) * | 1990-12-19 | 1995-06-20 | Integral Peripherals | Disk drive enclosed by shock absorbent jacket and mounted in electronic instrument |
| KR20000000734A (en) * | 1998-06-03 | 2000-01-15 | 구자홍 | Cartridge for record media |
| JP5751470B2 (en) * | 2008-08-20 | 2015-07-22 | 国立大学法人東北大学 | Shape / tilt detection and / or measurement optical apparatus and method and related apparatus |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5448433A (en) * | 1990-12-19 | 1995-09-05 | Integral Peripherals | Disk drive information storage device with baseplate and cover having overlapping edge portions to provide protection from electromagnetic interference |
| US5149048A (en) * | 1990-12-19 | 1992-09-22 | Integral Peripherals | Shock absorbent mounting arrangement for disk drive or other component |
| US5161770A (en) * | 1990-12-19 | 1992-11-10 | Integral Peripherals, Inc. | Shock absorbent mounting arrangement for disk drive or other component |
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