JPS61264507A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS61264507A JPS61264507A JP10501585A JP10501585A JPS61264507A JP S61264507 A JPS61264507 A JP S61264507A JP 10501585 A JP10501585 A JP 10501585A JP 10501585 A JP10501585 A JP 10501585A JP S61264507 A JPS61264507 A JP S61264507A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- head
- head chip
- erasing
- reproducing
- 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
Classifications
-
- 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
- G11B5/54—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 with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
-
- 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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- 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
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、磁気記録再生装置に用いる磁気ヘッドに関す
るもので、特に円盤状媒体にディジタル信号を記録再生
する磁気ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head used in a magnetic recording/reproducing device, and more particularly to a magnetic head for recording and reproducing digital signals on a disk-shaped medium.
従来の技術
近年磁気記録の進歩はめざましく、特にデータ情報を円
盤状の媒体に記録再生する装置、例えばアルミ盤上に磁
性体を塗布した、いわゆるハードディスク、又PET上
に磁性体を塗布したいわゆるフロッピーディスの進歩が
めざましく、高記録密度化へと進んでいる。これらの技
術は例えばフロッピーディスクドライブに・ついては雑
誌インターフェイス1ssaMAY特集号などで知られ
る0更に高密度化として、より小さな円盤に、よシ多数
の記録トラックを書き込むことが検討されている。トラ
ック密度を向上させた時に問題となるのが、互換性又は
耐候性の点で、記録したトラック上に、磁気ヘッドが再
生時に正確に位置するかどうかが問題となる。通常はト
ラッキング精度はどうしても“0”にすることができな
いため、記録時その直後に記録トラック幅の側面を少し
消去(サイトレース)して、記録パターン幅と、再生ト
ラック幅を違えることにより、ヘッドが正確にトラッキ
ングしなくても、以前に書かれたデータに重ね書きをし
ても、消し残シの不都合がないように対策している。2. Description of the Related Art In recent years, advances in magnetic recording have been remarkable, especially in devices that record and reproduce data information on disk-shaped media, such as so-called hard disks, which are made of aluminum disks coated with magnetic material, and so-called floppy disks, which are made of PET coated with magnetic material. Advances in disc technology are remarkable, and progress is being made towards higher recording densities. These technologies are known, for example, in the special issue of the magazine Interface 1ssaMAY regarding floppy disk drives.In order to further increase the density, writing a larger number of recording tracks on a smaller disk is being considered. When track density is increased, a problem arises in terms of compatibility or weather resistance, and whether the magnetic head is accurately positioned over the recorded track during reproduction. Normally, the tracking accuracy cannot be set to "0", so immediately after recording, the sides of the recording track width are slightly erased (site race) to make the recording pattern width and the playback track width different. Even if the data is not tracked accurately or if data is overwritten on previously written data, measures are taken to ensure that there are no unerased marks.
そのだめの磁気ヘッドとしては、第8図、第9図に示す
ものが採用されている。1,3はデータを記録再生する
リードライトギャップであり、2゜4は記録された記録
パターンの側面を消去するサイトイレースギャップであ
る。第8図のタイプはサイトイレースギャップの7リン
ジング磁界でサイド消去し、又第9図のタイプは幾可寸
法上サイド消去を行う。As a secondary magnetic head, those shown in FIGS. 8 and 9 are employed. 1 and 3 are read/write gaps for recording and reproducing data, and 2°4 is a site erase gap for erasing the sides of the recorded recording pattern. The type shown in FIG. 8 performs side erasing using a seven ringing magnetic field in the site erase gap, and the type shown in FIG. 9 performs side erasing on several dimensions.
発明が解決しようとする問題点
従来のサイトイレース方式は、円周の直径に較べ、記録
ギャップと消去ギャップ間隔が十分短かい時に問題がな
いのであり、高密度記録化の一端として、記録媒体の外
径が小さくなり、更にトラック幅も狭くなってきた時に
は、第10図に示すように、記録パターン幅3に対し、
ギャップ間隔6により、サイトイレス幅4と消し残り幅
6が生ずる。第9図に示したタイプのヘッドでギャップ
間隔6を考慮して内周側に消去ヘッドギャップを移動さ
せても、各トラック位置により円周が異なるため、すべ
てのトラックに対し追従するのは不可能である。このた
めサイトレース幅を増やし残留トラック幅を狭くせざる
を得なかった0本発明は以上のような従来の欠点を除去
するものであり、サイド消去が完全に行え、かつ製作が
容易な磁気ヘッドを提供することを目的とするものであ
る。Problems to be Solved by the Invention The conventional site erase method does not have any problems when the recording gap and erasing gap distances are sufficiently short compared to the circumferential diameter. When the outer diameter becomes smaller and the track width also becomes narrower, as shown in FIG.
The gap spacing 6 creates a site erase width 4 and an unerased width 6. Even if the erasing head gap is moved to the inner circumferential side with the type of head shown in Figure 9 taking into account the gap interval 6, it is impossible to follow all the tracks because the circumference differs depending on the position of each track. It is possible. For this reason, it was necessary to increase the site race width and narrow the residual track width.The present invention eliminates the above-mentioned conventional drawbacks, and provides a magnetic head that can completely perform side erasing and is easy to manufacture. The purpose is to provide the following.
問題点を解決するための手段
上記問題点を解決するために、本発明の磁気ヘッドは、
一端が固定端で他方が可動端であるヘッドベースに、固
定端に記録再生するヘッドチップを、可動端にサイド消
去するヘッドチップを設け、初期に略同−球面に仕上げ
、その後、所望の位置にサイド消去ヘッドチップを変位
させる構造としたものである0
作 用
本発明は上記の構成により、円盤状の記録媒体でトラッ
クの円周半径が種々異なっても、記録・再生トラックの
サイド消去が確実に、消し残シを生ずることなく行える
0そのため同一トラック密度では、より広いトラック幅
を得ることができ、信号のS/Nが向上する。Means for Solving the Problems In order to solve the above problems, the magnetic head of the present invention includes:
A head base with a fixed end on one end and a movable end on the other is provided with a head chip for recording and reproducing at the fixed end and a head chip for side erasing at the movable end, and is finished to an approximately uniform spherical surface at the initial stage, and then moved to the desired position. The present invention has a structure in which the side erasing head chip is displaced according to the above structure.Even if the circumferential radius of the track is different in a disc-shaped recording medium, the side erasing of the recording/reproducing track can be performed. Therefore, with the same track density, a wider track width can be obtained, and the signal-to-noise ratio is improved.
また、ヘッドの加工精度も、一体型の場合より高精度は
要求されないことになる。Furthermore, the machining accuracy of the head is not required to be as high as in the case of an integrated type.
実施例
本発明を実施例を用いて説明すると、第2図に示すセン
ダストブロックA11.B12のギャップ面を平坦に研
摩し、第3図に示すように、ギャップスペーサ13を介
しパックギャップ部を銀ろう薄14を用い、760Qで
熱処理を行いギャップ形成を行った。その後第4図に示
すように所望のトラック幅16にスライスして、コアチ
ップ16を作った。この時のコアチップは、第6図に示
すように記録・再生用のコアテップ16が、トラック幅
が60μmで、ギャップスペーサは0.4μm厚であり
、サイド消去用コアチップ19はトラック幅が30μm
で、ギャップスペーサは、6μmであった。また、これ
らのコアチップ16を保持する固定枠18は、後はどの
巻線のための巻線窓17を開部とした凹形の形状をして
いる。次に第6図に示すように分割溝22を設けて固定
端と可動端を有するヘッドベース20を用量する。これ
には、片側の可動端のヘッド接着面に圧電セラミクス2
1を付着させている。そして第7図に示すようにこの圧
電セラミクス21の付いている面にサイトイレース用の
コアブロックを接着し、他の固定端に記録・再生用のコ
アブロックを接着する。Embodiment To explain the present invention using an embodiment, the sendust block A11. shown in FIG. The gap surface of B12 was polished flat, and as shown in FIG. 3, the pack gap portion was heat-treated at 760Q using a thin silver solder 14 via a gap spacer 13 to form a gap. Thereafter, as shown in FIG. 4, the core chip 16 was produced by slicing it into desired track widths 16. As shown in FIG. 6, the core chip 16 for recording/reproducing has a track width of 60 μm, the gap spacer has a thickness of 0.4 μm, and the side erasing core chip 19 has a track width of 30 μm.
The gap spacer was 6 μm. Further, the fixed frame 18 that holds these core chips 16 has a concave shape with a winding window 17 for which winding wire is opened. Next, as shown in FIG. 6, a dividing groove 22 is provided to form a head base 20 having a fixed end and a movable end. This requires piezoelectric ceramics 2 on the head adhesive surface of one movable end.
1 is attached. Then, as shown in FIG. 7, a core block for site erasing is bonded to the surface on which the piezoelectric ceramic 21 is attached, and a core block for recording/reproducing is bonded to the other fixed end.
圧電セラミクス21としてはPb−Zr−Tiセラミク
スを用い厚み方向に電極23を設けた。その後第1図に
示すように、ヘッドの前面を円形に研摩し、巻線窓17
に各々、リード・ライト巻線24及びサイトイレース巻
線25を施しヘッドを完成させる。圧電セラミクス21
には、バイモルフ用電源26の変化により、矢印27に
示す方向に変位を起す。ヘッドの最終仕上げとして研摩
テープで前面を仕上げることによりチップの幅方向にも
R加工をし、バイモルフで変位させた時にも、ヘッドタ
ッチがかわらないように、ヘッド前面を略球面加工をし
た。Pb-Zr-Ti ceramics were used as the piezoelectric ceramics 21, and electrodes 23 were provided in the thickness direction. Thereafter, as shown in FIG. 1, the front surface of the head is polished circularly and the winding window 17 is polished.
A read/write winding 24 and a site erase winding 25 are applied to each of the heads to complete the head. Piezoelectric ceramics 21
In this case, a change in the bimorph power supply 26 causes a displacement in the direction shown by the arrow 27. As a final finishing touch to the head, the front surface was finished with abrasive tape, and the chip was also rounded in the width direction, and the front surface of the head was machined into a nearly spherical surface so that the head touch would not change even when displaced by bimorph.
この第1図に示すヘッドをフロッピーディスクドライブ
装置に取り付け、トラック信号に連動させ、バイモルフ
用電源26を変化させて、各々の円周でサイトイレース
の位置を変化させることにより、すべてのトラック半径
位置で、消し残りは全く生じなかった。そのため、記録
再生ギャップとサイド消去ギャップ間隔によるトラック
消し残り幅が無視でき、その分だけトラック幅を広くと
ることができた。By attaching the head shown in FIG. 1 to a floppy disk drive device, interlocking with the track signal, and changing the bimorph power supply 26 to change the site erase position on each circumference, all track radial positions can be adjusted. There was no unerasable residue at all. Therefore, the unerased track width due to the recording/reproducing gap and the side erase gap interval can be ignored, and the track width can be made wider by that amount.
また第2の実施例として、バイモルフ用電源26を用い
ずに、機械的にビおにより変位させ、そのまま固定させ
たヘッドを比較的円周半径の大きい装置に用いた。この
場合、記録・再生トラックと、サイド消去トラックを一
体物でヘッドを作った時よシも、ヘッド加工精度がラフ
でよかった。すなわち、ヘッドの加工精度はサイド消去
ヘッドのギャップ間隔のみ高精度が必要で、他はビスで
微調することができたためである。Further, as a second embodiment, a head that was mechanically displaced by a via and fixed as it was without using the bimorph power source 26 was used in an apparatus having a relatively large circumferential radius. In this case, even when the head was made by integrating the recording/playback track and the side erase track, the head processing accuracy was rough and good. In other words, the processing accuracy of the head requires high accuracy only in the gap distance of the side erase head, and the rest can be finely adjusted using screws.
発明の効果
以上のように本発明によれば、固定端に記録・再生ヘッ
ドチップを設け、可動片端にサイド消去ヘッドチップを
設けることによシ、すべての円周半径においてサイド消
去の消し残シを生ずることなく、シかもヘッドの加工精
度が比較的ラフであっても十分のサイド消去形磁気ヘッ
ドを構成することができた。Effects of the Invention As described above, according to the present invention, by providing a recording/reproducing head chip at the fixed end and a side erasing head chip at the movable end, unerased traces of side erasing can be eliminated at all circumferential radii. Even if the machining accuracy of the head is relatively rough, a satisfactory side-erasing magnetic head can be constructed without causing any problems.
第1図は本発明の磁気ヘッドの一実施例を示す斜視図、
第2図〜第7図は本発明の実施例に示すヘッドの製造工
程を示す斜視図、第8図、第9図は従来ヘッドの説明の
ためのヘッド構成図、第10図は現状の不都合を示す説
明図である。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名M1
図
第2図
t’7 t’t
第6図
第8図 第9図
第10図FIG. 1 is a perspective view showing an embodiment of the magnetic head of the present invention;
Figures 2 to 7 are perspective views showing the manufacturing process of the head shown in the embodiment of the present invention, Figures 8 and 9 are head configuration diagrams for explaining the conventional head, and Figure 10 is the current disadvantage. FIG. Name of agent: Patent attorney Toshio Nakao and 1 other M1
Figure 2 t'7 t't Figure 6 Figure 8 Figure 9 Figure 10
Claims (2)
に記録・再生用ヘッドチップを設け、可動端に記録再生
トラックの側面をサイド消去するヘッドチップを設けた
磁気ヘッド。(1) A magnetic head in which a head base has a fixed end and a movable end, a recording/reproducing head chip is provided at the fixed end, and a head chip for side erasing the side surface of a recording/reproducing track is provided at the movable end.
動させる構成とした特許請求の範囲第1項記載の磁気ヘ
ッド。(2) The magnetic head according to claim 1, wherein the side erase head chip is configured to be moved by a piezoelectric bimorph.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10501585A JPS61264507A (en) | 1985-05-17 | 1985-05-17 | Magnetic head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10501585A JPS61264507A (en) | 1985-05-17 | 1985-05-17 | Magnetic head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61264507A true JPS61264507A (en) | 1986-11-22 |
Family
ID=14396237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10501585A Pending JPS61264507A (en) | 1985-05-17 | 1985-05-17 | Magnetic head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61264507A (en) |
-
1985
- 1985-05-17 JP JP10501585A patent/JPS61264507A/en active Pending
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