JPS62119707A - Magnetic head for magnetic disk - Google Patents

Magnetic head for magnetic disk

Info

Publication number
JPS62119707A
JPS62119707A JP25781585A JP25781585A JPS62119707A JP S62119707 A JPS62119707 A JP S62119707A JP 25781585 A JP25781585 A JP 25781585A JP 25781585 A JP25781585 A JP 25781585A JP S62119707 A JPS62119707 A JP S62119707A
Authority
JP
Japan
Prior art keywords
magnetic head
magnetic
center
disk
floppy
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
Application number
JP25781585A
Other languages
Japanese (ja)
Inventor
Takashi Matsumoto
隆 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP25781585A priority Critical patent/JPS62119707A/en
Publication of JPS62119707A publication Critical patent/JPS62119707A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/488—Disposition of heads
    • G11B5/4886—Disposition of heads relative to rotating disc

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

PURPOSE:To make the recording and reproducing levels of a magnetic head for magnetic disk larger, by providing a magnetic head gap at a position which is surely contacted with a magnetic disk. CONSTITUTION:A magnetic head gap 5 is not provided at the center of a face which is contacted with an slid on a video floppy disk 1, but on the right-side outer periphery section of the floppy 1 as shown in the figure. Therefore, even when the projected quantity of a magnetic head 4 is enlarged and the central part of the sliding face of the magnetic head 4 is separated from the video floppy 1, the part of the magnetic head gap 5 is surely contacted with the floppy 1. The optimum value of the distance (l) from the center of the sliding face to the magnetic head gap 5 varies depending upon the curvature of the sliding face, projected quantity of the magnetic head, material of the video floppy 1, etc., but the variation is not large since the above-mentioned items are decided by a unified standard format. The change in the optimum value of the distance (l) is, for example, about 30mum.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、記録レベル及び再生レベルの大きな磁気ディ
スク用磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a magnetic head for a magnetic disk with a high recording level and high reproduction level.

〈従来の技術〉 静止画像を磁気記録する電子スチルカメラに用いられる
スチルビデオフロッピー（以下、ビデオフロッピーと略
す）は小型の磁気ディスクであり、その統一規格フォー
マットが内外のメーカにより決定されている。このビデ
オフロッピーは柔軟であるため、高速回転するビデオフ
ロッピーに単に磁気ヘッドを押し付けるだけでは、安定
したヘッドタッチが得られず良好な記録再生とならない
。そこで、ビデオフロッピーを間に挾んで磁気ヘッドと
対向する規整板を配置するのが一般的である。<Prior Art> A still video floppy (hereinafter abbreviated as video floppy) used in an electronic still camera that magnetically records still images is a small magnetic disk, and its uniform standard format has been determined by domestic and foreign manufacturers. Since this video floppy is flexible, simply pressing a magnetic head against a video floppy rotating at high speed will not provide a stable head touch and will not result in good recording and reproduction. Therefore, it is common to arrange a regulating plate facing the magnetic head with the video floppy in between.

乙の規整板には、凹部が形成されており、との凹部にビ
デオフロッピーを磁気ヘッドで押し付けて、第２図に示
すように凹部内でビデオフロッピー１を湾曲した状態と
することにより、磁気ヘッド２と安定したヘッドタッチ
を達成するようにしている。A recess is formed in the regulating plate B, and by pressing the video floppy 1 into the recess with a magnetic head and bending the video floppy 1 within the recess as shown in FIG. An attempt is made to achieve stable head contact with head 2.

〈発明が解決しようとする問題点〉 磁気ヘッド２とビデオフロッピーとの安定したヘッドタ
ッチを達成するためには、磁気ヘッド１の突出量を大き
くすれば良いが、このようにすると、ビデオフロッピー
に対する摺接面中央の面圧が低下し、その中央よりも上
流側或いは下流側において最大面圧となることが報告さ
れている（古賀能“スチルビデオフ四ツビー用ディスク
の性能″電子通信学会信学技報Ｖｏ１．８５　Ｎｏ、　
１２０）。磁気ヘッド１の摺動面中央には磁気ヘッドギ
ャップ３が配置されているため、摺動面中央の面圧が低
下して第２図に示すように磁気ヘッド慴動面中央とビデ
オフロッピー１とが離れてしまうと、記録レベル及び再
生レベルが低下することとなる。<Problems to be Solved by the Invention> In order to achieve stable head contact between the magnetic head 2 and the video floppy, the amount of protrusion of the magnetic head 1 may be increased. It has been reported that the contact pressure at the center of the sliding surface decreases, and the maximum contact pressure occurs on the upstream or downstream side of the center (Noh Koga, "Performance of discs for still video cameras," IEICE Newsletter). Academic Report Vol. 1.85 No.
120). Since the magnetic head gap 3 is placed at the center of the sliding surface of the magnetic head 1, the surface pressure at the center of the sliding surface is reduced, and as shown in FIG. If they are separated, the recording level and reproduction level will decrease.

本発明は、磁気ヘッドの磁気ディスクに対する摺動面に
おいてはその中央が最大面圧となるのでなく、その中央
よりも上流側或いは下流側で最大面圧となるという知見
に基づきなされたもので、記録レベル及び再生レベルの
大きな磁気ディスク用磁気ヘッドを提供することを目的
とする。The present invention was made based on the knowledge that on the sliding surface of a magnetic head against a magnetic disk, the maximum surface pressure is not at the center, but at the upstream or downstream side of the center. An object of the present invention is to provide a magnetic head for a magnetic disk with a high recording level and high reproduction level.

く問題点を解決するための手段〉 斯かる目的を達成する本発明の磁気ディスク用磁気ヘッ
ドの構成は磁気ディスクに対する磁気ヘッド摺動面の中
央から磁気ヘッドギャップを上流側或いは下流側にずら
して配置したことを特徴とする。Means for Solving the Problems> The structure of the magnetic head for a magnetic disk of the present invention that achieves the above object is to shift the magnetic head gap upstream or downstream from the center of the sliding surface of the magnetic head with respect to the magnetic disk. It is characterized by its placement.

く作　　　用〉 磁気ヘッドの磁気ディスクに対する摺動面において、最
大面圧となるその中央よりも外周に磁気ヘッドギャップ
を配置したので、磁気ヘッドギャップが磁気ディスクに
確実に接触することとなる。Function> Since the magnetic head gap is disposed at the outer periphery of the sliding surface of the magnetic head against the magnetic disk, rather than the center where the surface pressure is maximum, the magnetic head gap is in reliable contact with the magnetic disk.

く実　施　例〉 以下、本発明の一実施例について図面を参照して詳細に
説明する。Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

第１図に本発明の一実施例を示すように、本実施例の磁
気ヘッド４では、磁気ヘッドギャップ５が、そのビデオ
フロッピー１に対する摺動面の中央にあるのではなく、
その中央よりも図中右側の外周に配置されている。従っ
て、磁気ヘッド４の突出量を大きくして、第１図中に示
すように摺動面中央とビデオフロッピー１とが離れるよ
うな場合であっても、磁気ヘッドギャップ５の部分は確
実にビデオフロッピー１に接触することとなる。ヘッド
摺動面中央から磁気ヘッドギャップ５までの長さｅとし
て最適な値は、磁気ヘッドの摺動面曲率、突出量、ビデ
オフロッピー１の材質等によって変わるが、これらは統
一規格フォーマットにより決定されているため、大幅に
変わるものでなく、例えば第３図に示されるように約３
０μｍ程度である。第３図は、磁気ヘッド摺動面曲率Ｒ
さ５順の場合について、相対出力レベルを測定したもの
である。第３図に示すように、ヘッド摺動面中央から磁
気へ７ドギヤツプまでの長さ−が約３０μｍとなるとこ
ろで、相対出力レベルが最大となっている。As shown in one embodiment of the present invention in FIG. 1, in the magnetic head 4 of this embodiment, the magnetic head gap 5 is not located at the center of the sliding surface with respect to the video floppy 1;
It is arranged on the outer periphery on the right side in the figure rather than the center. Therefore, even if the protrusion amount of the magnetic head 4 is increased so that the center of the sliding surface and the video floppy disk 1 are separated from each other as shown in FIG. It will come into contact with floppy disk 1. The optimum value for the length e from the center of the head sliding surface to the magnetic head gap 5 varies depending on the curvature of the sliding surface of the magnetic head, the amount of protrusion, the material of the video floppy 1, etc., but these are determined by the unified standard format. As shown in Figure 3, it does not change significantly.
It is about 0 μm. Figure 3 shows the curvature R of the sliding surface of the magnetic head.
The relative output level was measured for the case of 5th order. As shown in FIG. 3, the relative output level is at its maximum when the length from the center of the head sliding surface to the magnetic seventh gap is approximately 30 μm.

尚、上記実施例では、−例としてビデオフロッピー用の
磁気ヘッドについて説明したが、本発明はこれに限るも
のではなく、その他の磁気ディスク用磁気ヘッドにも適
用できるものである。In the above embodiment, a magnetic head for a video floppy was described as an example, but the present invention is not limited to this, and can be applied to magnetic heads for other magnetic disks.

〈発明の効果〉 以上、実施例に基づいて具体的に説明したように、本発
明の磁気ヘッドは磁気ディスクに対して確実に接触する
位置に磁気ヘッドギャップを配置したので、記録レベル
及び再生レベルが大きい。<Effects of the Invention> As described above in detail based on the embodiments, the magnetic head of the present invention has the magnetic head gap located at a position where it makes reliable contact with the magnetic disk, so that the recording level and reproduction level can be improved. is large.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例に係る磁気ヘッドの正面図、
第２図は従来の磁気ヘッドの正面図、第３図はヘッド摺
動面中央からギャップまでの長さ−と相対出力レベルと
の関係を示すグラフである。 図　　面　　中、 ｌはビデオフロッピー、 ２．４は磁気ヘッド、 ３．５は磁気ヘッドギャップである。 特　　許　　出　　願　　人 富士写真フィルム株式会社 代　　　　理　　　　人FIG. 1 is a front view of a magnetic head according to an embodiment of the present invention;
FIG. 2 is a front view of a conventional magnetic head, and FIG. 3 is a graph showing the relationship between the length from the center of the head sliding surface to the gap and the relative output level. In the drawing, 1 is a video floppy disk, 2.4 is a magnetic head, and 3.5 is a magnetic head gap. Patent application Agent: Fuji Photo Film Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 磁気ディスクに対する磁気ヘッド摺動面の中央から磁気
ヘッドギャップを上流側或いは下流側にずらして配置し
たことを特徴とする磁気ディスク用磁気ヘッド。A magnetic head for a magnetic disk, characterized in that the magnetic head gap is shifted upstream or downstream from the center of the sliding surface of the magnetic head relative to the magnetic disk.
JP25781585A 1985-11-19 1985-11-19 Magnetic head for magnetic disk Pending JPS62119707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25781585A JPS62119707A (en) 1985-11-19 1985-11-19 Magnetic head for magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25781585A JPS62119707A (en) 1985-11-19 1985-11-19 Magnetic head for magnetic disk

Publications (1)

Publication Number Publication Date
JPS62119707A true JPS62119707A (en) 1987-06-01

Family

ID=17311504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25781585A Pending JPS62119707A (en) 1985-11-19 1985-11-19 Magnetic head for magnetic disk

Country Status (1)

Country Link
JP (1) JPS62119707A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02312004A (en) * 1989-05-26 1990-12-27 Sharp Corp Magnetic head
JPH03189907A (en) * 1989-12-18 1991-08-19 Matsushita Electric Ind Co Ltd Magnetic head and its production
US5838523A (en) * 1991-09-30 1998-11-17 Matsushita Electric Industrial Co., Ltd. Magnetic head with reduced gap wear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02312004A (en) * 1989-05-26 1990-12-27 Sharp Corp Magnetic head
JPH03189907A (en) * 1989-12-18 1991-08-19 Matsushita Electric Ind Co Ltd Magnetic head and its production
US5838523A (en) * 1991-09-30 1998-11-17 Matsushita Electric Industrial Co., Ltd. Magnetic head with reduced gap wear

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