JP2800400B2 - Magnetic head and magnetic recording device - Google Patents
Magnetic head and magnetic recording deviceInfo
- Publication number
- JP2800400B2 JP2800400B2 JP2309779A JP30977990A JP2800400B2 JP 2800400 B2 JP2800400 B2 JP 2800400B2 JP 2309779 A JP2309779 A JP 2309779A JP 30977990 A JP30977990 A JP 30977990A JP 2800400 B2 JP2800400 B2 JP 2800400B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic head
- head
- chip
- head chip
- 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.)
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は、オーディオ機器、ビデオ機器、コンピュー
タ等に用いられる磁気ヘッドに関するものであり、特に
高信号レートの記録再生に用いる磁気ヘッドと磁気テー
プの接触状態を良好に保つのに適した構造の磁気ヘッド
および磁気記録装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head used for audio equipment, video equipment, a computer, and the like, and particularly to a magnetic head used for recording and reproduction at a high signal rate and a magnetic tape. The present invention relates to a magnetic head and a magnetic recording device having a structure suitable for maintaining a good state.
従来の技術 回転ヘッドを用いてヘリカル走査を行う磁気記録装置
では、近年、高品位VTRやディジタルVTRなどの広帯域信
号を取り扱うシステムの開発が盛んになっている。広帯
域信号を記録再生するため、マルチトラック化された磁
気ヘッドが研究されている（例えば、養田他；第13回日
本応用磁気学会学術講演22pA−15）。2. Description of the Related Art In a magnetic recording apparatus that performs helical scanning using a rotary head, in recent years, a system for handling a wideband signal such as a high-quality VTR or a digital VTR has been actively developed. In order to record and reproduce wideband signals, multi-track magnetic heads have been studied (for example, Yoda et al .; The 13th Japan Society of Applied Magnetics, 22pA-15).
マルチトラックの記録再生を行なうには、回転シリン
ダの一つの窓に複数個のヘッドを取り付けた方が良く、
またテープと均一な接触を保持するために、ヘッドの突
出形状やトラック幅方向Ｒの最適化等の工夫が成されて
いる。In order to perform multi-track recording and playback, it is better to attach multiple heads to one window of the rotating cylinder,
In addition, in order to maintain uniform contact with the tape, some measures such as optimization of the protruding shape of the head and the track width direction R have been made.
そして、これらに搭載される磁気ヘッドチップには、
フェライトで構成されたバルク型磁気ヘッドまたは磁路
を形成する磁性体の両側を非磁性の基板で狭持する積層
型磁気ヘッドなどが主に用いられている。And the magnetic head chips mounted on these
A bulk type magnetic head made of ferrite or a laminated type magnetic head in which a magnetic material forming a magnetic path is sandwiched between nonmagnetic substrates on both sides is mainly used.
近年、これらの磁気記録装置に用いられる磁気テープ
は、さらに長時間大容量記録を行いたいという要望に対
応するため、磁気テープを薄くすることにより単位体積
に収納される磁気テープ長を長くすることが、盛んに検
討されている。しかし、磁気テープを薄くすると、厚さ
の３乗に逆比例して、磁気テープのスティフネスが低下
する。In recent years, the magnetic tapes used in these magnetic recording devices have been required to increase the length of the magnetic tape accommodated in a unit volume by making the magnetic tape thinner in order to respond to the demand for longer-time large-capacity recording. However, it is being actively studied. However, when the magnetic tape is made thin, the stiffness of the magnetic tape is reduced in inverse proportion to the cube of the thickness.
発明が解決しようとする課題 上記のようなマルチトラック磁気ヘッドを用い、短時
間記録用の厚手磁気テープで記録再生を行うと、ヘッド
の前面形状は厚手磁気テープになじみ、磁気ヘッドの幅
方向の曲率半径が大きくなる。一般に、シリンダの回転
によって生じる空気流によるテープの変形、テープ・ヘ
ッドの相対運動のため、ヘッド入り側の圧力は出側の圧
力に比べて大きくなる。特に、同一材料で構成されたマ
ルチトラック磁気ヘッドにおいては、シリンダの回転方
向に対して先頭の磁気ヘッドの摩耗量が最後尾の磁気ヘ
ッドの摩耗量より大きくなり、このため先頭の磁気ヘッ
ドの幅方向の曲率半径が、最後尾の磁気ヘッド幅方向の
曲率半径に比べて大きくなる。この後、長時間記録用の
薄手磁気テープで記録再生を行うと、薄手磁気テープ
は、スティフネスが小さいため幅方向の磁気テープの変
形が大きくなり、先頭の磁気ヘッドとの当りが不十分と
なる。このためスページングロスが増大し、先頭の磁気
ヘッドの再生出力が、後行の磁気ヘッドでの再生出力に
比べて低下する。これは、出力波形のエンベロープの悪
化として観測される。Problems to be Solved by the Invention When performing recording and reproduction with a thick magnetic tape for short-time recording using the multi-track magnetic head as described above, the front surface shape of the head is adapted to the thick magnetic tape, and the width of the magnetic head in the width direction is increased. The radius of curvature increases. Generally, the pressure on the head entrance side is higher than the pressure on the exit side due to the deformation of the tape due to the air flow generated by the rotation of the cylinder and the relative movement of the tape head. In particular, in the case of a multi-track magnetic head made of the same material, the wear amount of the first magnetic head becomes larger than the wear amount of the last magnetic head in the rotation direction of the cylinder. The radius of curvature in the direction becomes larger than the radius of curvature in the width direction of the last magnetic head. Thereafter, when recording / reproducing is performed with a thin magnetic tape for long-time recording, the thin magnetic tape has a small stiffness, so that the deformation of the magnetic tape in the width direction becomes large, and the contact with the leading magnetic head becomes insufficient. . For this reason, the sparing loss increases, and the reproduction output of the head magnetic head is lower than the reproduction output of the succeeding magnetic head. This is observed as a deterioration in the envelope of the output waveform.
従来の磁気ヘッドでは、初期の磁気ヘッドの幅方向の
曲率半径を小さくして、この現象の改善を試みていた
が、この曲率半径は磁気ヘッドの摩耗によって形状が大
きく変化し、さらに摩耗の進行とともに各ヘッド間の摩
耗量に差ができ、このため各ヘッドでの曲率半径が変わ
るため、本質的な改善を得ることはできなかった。Conventional magnetic heads have attempted to improve this phenomenon by reducing the radius of curvature of the initial magnetic head in the width direction.However, the radius of curvature changes greatly due to the wear of the magnetic head, and the wear further progresses. At the same time, the amount of wear between the heads is different, and the radius of curvature at each head changes, so that an essential improvement cannot be obtained.
本発明は、マルチトラック磁気ヘッドを用いてヘリカ
ル走査を行う際、先行する磁気ヘッドの再生出力の低下
を解決する磁気ヘッドおよび磁気記録装置を提供するこ
とを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head and a magnetic recording apparatus that can solve a decrease in reproduction output of a preceding magnetic head when performing helical scanning using a multi-track magnetic head.
課題を解決するための手段 本発明は上記目的を達成するために、磁気ヘッドチッ
プを隣接して有するマルチトラック磁気ヘッドであっ
て、回転シリンダの回転方向に対して先頭の磁気ヘッド
チップより最後尾の磁気ヘッドチップにかけて経年的な
摩後の幅方向の曲率半径が概略同じになるように各ヘッ
ドチップの比摩耗量を異ならせたものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a multi-track magnetic head having magnetic head chips adjacent to each other, wherein the multi-track magnetic head has a rear end from a head magnetic head chip in a rotation direction of a rotary cylinder. The specific wear amount of each head chip is changed so that the radius of curvature in the width direction after aging over the magnetic head chip becomes substantially the same.
作用 一般に、磁気テープと磁気ヘッドが摺動した場合、磁
気ヘッドの摩耗量は接触圧力が大きいほど大きい。した
がって、従来の同一コア幅で構成されたマルチトラック
磁気ヘッドで磁気テープを摺動させると、通常磁気ヘッ
ドに対する圧力は先頭の磁気ヘッドより最後尾の磁気ヘ
ッドにかけて順次減少する。このため、先頭の磁気ヘッ
ドの摩耗量が大きくなり、幅方向の曲率半径も大きくな
る。本発明のマルチトラック磁気ヘッドでヘリカル走査
を行うと、先頭の磁気ヘッドは後続の磁気ヘッドより比
摩耗量が小さいため、各磁気ヘッドの摩耗による、ヘッ
ド突き出し量の変化をほぼ同等にできる。このため、各
磁気ヘッドの幅方向の曲率半径をほぼ同じにすることが
でき、各磁気ヘッドに対する磁気テープの接触状態をほ
ぼ同じにすることができる。さらに、摩耗が進行しても
各ヘッドとも同じ程度に良好なヘッドタッチが維持され
る。In general, when the magnetic tape slides with the magnetic head, the wear amount of the magnetic head increases as the contact pressure increases. Therefore, when the magnetic tape is slid with the conventional multi-track magnetic head having the same core width, the pressure on the normal magnetic head gradually decreases from the head magnetic head to the tail magnetic head. For this reason, the amount of wear of the head magnetic head increases, and the radius of curvature in the width direction also increases. When helical scanning is performed by the multi-track magnetic head of the present invention, since the head magnetic head has a smaller specific wear amount than the subsequent magnetic heads, the change in head protrusion amount due to wear of each magnetic head can be made substantially equal. Therefore, the radius of curvature of each magnetic head in the width direction can be made substantially the same, and the contact state of the magnetic tape with each magnetic head can be made almost the same. Further, even if wear progresses, the same good head touch is maintained for each head.
実施例 以下本発明の一実施例の磁気ヘッドについて、図面を
参照しながら説明する。Embodiment Hereinafter, a magnetic head according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明を適用した、磁気ヘッドチップが３個
の場合のマルチトラック磁気ヘッドの一実施例の斜視図
であり、第２図は磁気ヘッドチップ部の拡大図である。FIG. 1 is a perspective view of one embodiment of a multi-track magnetic head to which the present invention is applied when there are three magnetic head chips, and FIG. 2 is an enlarged view of a magnetic head chip portion.
磁気ヘッドは、回転シリンダの回転に際して最初に磁
気テープと接触する先頭の磁気ヘッドチップ１、中間の
磁気ヘッドチップ２、最後尾の磁気ヘッドチップ３をヘ
ッドベース４に搭載することにより構成される。The magnetic head is configured by mounting a head magnetic head chip 1, an intermediate magnetic head chip 2, and a tail magnetic head chip 3 that come into contact with a magnetic tape first upon rotation of a rotary cylinder on a head base 4.
比摩耗量とは、単位走行時間当りの摩耗体積であり、
用いる磁気記録装置の回転シリンダ上に各種ヘッド材料
を先頭曲率半径およびヘッド突出量を同一にして取り付
け、所定の時間同一磁気テープを走行させた後の摩耗体
積を走行距離で割った値として求められ、それぞれの磁
気記録装置に用いる磁気テープと磁気ヘッド材料で規定
されるものである。摩耗体積は、触針式の表面粗さ計で
摩耗試験前後の形状を測定し、体積差を算出することよ
り求めた。The specific wear amount is a wear volume per unit traveling time,
Various head materials are mounted on the rotating cylinder of the magnetic recording device to be used with the same head radius of curvature and the same amount of head protrusion, and the wear volume after running the same magnetic tape for a predetermined time is calculated as a value obtained by dividing the wear volume by the running distance. Are defined by the magnetic tape and the magnetic head material used for each magnetic recording device. The abrasion volume was determined by measuring the shape before and after the abrasion test using a stylus type surface roughness meter and calculating the volume difference.
実施例において比摩耗量は、Ｓ−VHS方式VTRデッキを
用い、各種ヘッド材料を同一形状で取り付け、市販のＳ
−VHS用ビデオテープを100時間走行した後の摩耗体積を
走行距離（走行時間×相対速度）で割ったものである。In the embodiment, the specific wear amount is determined by using an S-VHS type VTR deck, mounting various head materials in the same shape,
-A value obtained by dividing the abrasion volume after running the VHS video tape for 100 hours by the running distance (running time x relative speed).
本発明に用いられるマルチトラック磁気ヘッドには、
例えば第２図に示すような構成がある。The multitrack magnetic head used in the present invention includes:
For example, there is a configuration as shown in FIG.
先頭の磁気ヘッドチップ１は、比摩耗量5.0×10-18m2
のMn−Znフェライトで構成されたバルク型磁気ヘッドで
中間の磁気ヘッドチップ２は磁路を形成する磁性体の両
側を比摩耗量7.2×10-18m2のニッケル酸チタン酸マグネ
シウム系セラミック材料（NiO−TiO2−MgO系）からなる
非磁性基板で挟持した積層構造の磁気ヘッドチップであ
り、最後尾の磁気ヘッドチップ３は磁路を形成する磁性
体の両側を比摩耗量10×10-18m2のチタン酸バリウム系
セラミック材料（TiO2−BaO系）からなる非磁性基板で
狭持した積層構造の磁気ヘッドチップである。The top magnetic head chip 1 has a specific wear of 5.0 × 10 -18 m 2
The magnetic head chip 2 is a bulk type magnetic head made of Mn-Zn ferrite, and the both sides of a magnetic material forming a magnetic path are made of a magnesium nickel titanate ceramic material having a specific wear of 7.2 × 10 −18 m 2. a magnetic head chip laminated structure is sandwiched between a non-magnetic substrate made of (NiO-TiO 2 -MgO system), both sides specific wear rate 10 × 10 of the last of the magnetic head chip 3 magnetic body forming the magnetic path This is a magnetic head chip having a laminated structure sandwiched between non-magnetic substrates made of a barium titanate-based ceramic material (TiO 2 -BaO-based) of -18 m 2 .
第３図は本発明による磁気記録装置の一実施例を示
す。図において、傾斜ポスト25,27および回転上シリン
ダ28、固定下シリンダ26に摺接して矢印方向に移動する
磁気テープ24は、図を見易くするために一部割愛してあ
る。FIG. 3 shows an embodiment of the magnetic recording apparatus according to the present invention. In the figure, the magnetic tape 24 which slides on the inclined posts 25 and 27, the rotating upper cylinder 28 and the fixed lower cylinder 26 and moves in the direction of the arrow is partially omitted for easy viewing.
従来の同一材料で構成されたマルチトラック磁気ヘッ
ドでは、先頭の磁気ヘッド１は、後行する磁気ヘッド2,
3より強い接触圧を受けるため、摩耗が進み幅方向の曲
率半径が大きくなる。このため厚手磁気テープを走行し
た後、薄手の磁気テープを記録再生すると、先頭の磁気
ヘッドの接触状態が悪くなり、再生出力が低下する。こ
の再生出力のエンベロープを第４図（Ａ），（Ｂ），
（Ｃ）に示す。このように走行方向に対し入り側の磁気
ヘッドほどエンベロープの崩れが激しい。これに対して
本発明の磁気ヘッドでは、先頭の磁気ヘッド１から最後
尾の磁気ヘッド３にかけて比摩耗量が大きくなるため、
摩耗によるヘッド突出量の変化がほぼ等しくなり、各ヘ
ッドの方向の曲率半径もほぼ等しくなる。したがって、
薄手の磁気テープの記録再生に対しても良好に出力特性
が得られる。この再生出力のエンベロープを第５図
（Ａ），（Ｂ），（Ｃ）に示す。第４図，第５図から明
らかなように、本発明の磁気ヘッドの構造は均一なエン
ベロープ出力が得られる。さらに、各ヘッドの摩耗によ
るヘッド突き出し量の変化がほぼ等しいため、ギャップ
デプスが開くまでの走行時間もほぼ等しく、各ヘッドチ
ップの寿命が均一なヘッド構成になる。In the conventional multi-track magnetic head made of the same material, the leading magnetic head 1 is replaced by the following magnetic heads 2,
Since the contact pressure is higher than 3, the wear proceeds and the radius of curvature in the width direction increases. Therefore, when a thin magnetic tape is recorded and reproduced after running the thick magnetic tape, the contact state of the head magnetic head is deteriorated, and the reproduction output is reduced. The envelope of this playback output is shown in FIGS.
It is shown in (C). As described above, the collapse of the envelope is more severe as the magnetic head is closer to the entrance in the traveling direction. On the other hand, in the magnetic head of the present invention, since the specific wear increases from the first magnetic head 1 to the last magnetic head 3, the specific wear increases.
The change in the amount of head protrusion due to wear is substantially equal, and the radius of curvature in the direction of each head is also substantially equal. Therefore,
Good output characteristics can be obtained even for recording and reproduction on a thin magnetic tape. The envelope of the reproduced output is shown in FIGS. 5 (A), (B) and (C). As is clear from FIGS. 4 and 5, the structure of the magnetic head of the present invention can obtain a uniform envelope output. Further, since the change in the amount of protrusion of the head due to the wear of each head is substantially equal, the running time until the gap depth is opened is also substantially equal, and the head configuration has a uniform life of each head chip.
また次のような構成もできる。３つの磁気ヘッドチッ
プは、それぞれ磁路を形成する磁性体の両側を非磁性の
基板で狭持された構造を有する磁気ヘッドチップであ
り、先頭の磁気ヘッドチップの基板は、比摩耗量8.3×1
0-18m2のチタン酸マグネシウム系セラミック材料（TiO2
−MgO系）で、中央の磁気ヘッドチップの基板は、比摩
耗量15×10-18m2のチタン酸カルシウム系セラミック材
料（TiO2−CaO系）で、最後尾の磁気ヘッドチップの基
板は、比摩耗量19×10-18m2のニッケル酸マンガン系セ
ラミック材料（NiO−MnO系）を用いた場合も本発明に適
した構造となる。In addition, the following configuration is also possible. Each of the three magnetic head chips is a magnetic head chip having a structure in which both sides of a magnetic material forming a magnetic path are sandwiched by nonmagnetic substrates, and the substrate of the first magnetic head chip has a specific wear amount of 8.3 × 1
0 -18 m 2 of magnesium titanate-based ceramic material (TiO 2
-MgO-based), the substrate of the center magnetic head chip is a calcium titanate-based ceramic material (TiO 2 -CaO-based) with a specific wear of 15 × 10 -18 m 2 , and the substrate of the last magnetic head chip is Also, when a manganese nickelate-based ceramic material (NiO-MnO-based) having a specific wear amount of 19 × 10 −18 m 2 is used, the structure is suitable for the present invention.
また次のような構成もできる。マルチトラック磁気ヘ
ッドの先頭の磁気ヘッドチップの前に、Mn−Znフェライ
トで作成されたバルク型ダミーヘッドチップを設け、後
続の磁気ヘッドチップは、磁路を形成する磁性体の両側
を、Mn−Znフェライトより比摩耗量の多い非磁性基板で
狭持した構造の磁気ヘッドチップからなるマルチトラッ
ク磁気ヘッドも、本発明に適した構造となる。In addition, the following configuration is also possible. A bulk type dummy head chip made of Mn-Zn ferrite is provided in front of the head magnetic head chip of the multi-track magnetic head, and subsequent magnetic head chips have Mn-sides on both sides of a magnetic material forming a magnetic path. A multi-track magnetic head composed of a magnetic head chip sandwiched between non-magnetic substrates having a higher specific wear than Zn ferrite also has a structure suitable for the present invention.
また単結晶材料は両方位によっても摩耗性が異なるこ
とが知られている。したがってバルク型磁気ヘッドに用
いる単結晶フェライトの両方位、あるいは基板材料の両
方位を変えることにより非摩耗量の異なる磁気ヘッドチ
ップを作製し、マルチトラック磁気ヘッドを作製しても
良い。It is known that a single crystal material has different wear properties depending on both positions. Therefore, by changing both positions of single crystal ferrite used for the bulk type magnetic head or both positions of the substrate material, magnetic head chips having different amounts of non-wear may be manufactured to manufacture a multi-track magnetic head.
以上、磁気ヘッドチップが、３個の場合について実施
例を説明したが、本構成の磁気ヘッドはシリンダの一つ
のヘッド取り付け窓中に、４個以上の磁気ヘッドチップ
が取り付けてある構成においても同様の効果を示すこと
は言うまでもない。Although the embodiment has been described above in the case where the number of magnetic head chips is three, the magnetic head of the present configuration is also applicable to a configuration in which four or more magnetic head chips are mounted in one head mounting window of the cylinder. Needless to say, the effect is exhibited.
本構造の磁気ヘッドは、上記方法以外でも作製可能で
あり、比摩耗率がシリンダの回転方向に対して先行する
磁気ヘッドから最後尾の磁気ヘッドにかけて、順次大き
くなる構成を有することにより、本発明の効果を得るこ
とができる。The magnetic head of the present structure can be manufactured by a method other than the above-described method, and has a configuration in which the specific wear rate gradually increases from the magnetic head preceding the magnetic head in the rotation direction of the cylinder to the rearmost magnetic head. The effect of can be obtained.
本構造の磁気ヘッドは、積層構造のマルチトラック磁
気ヘッドのみでなく、バルク型フェライトヘッド、メタ
ルインギャップ構造ヘッドについても同様の効果が得ら
れることは言うまでもない。また本構造の磁気ヘッド
は、回転シリンダを用いた磁気記録装置のみではなく、
２つの固定シリンダの間を回転ヘッドが回転する構成、
または磁気ヘッドが固定され磁気媒体が高速で摺動する
構成等で用いられるマルチトラック磁気ヘッドでも同様
な効果が得られることは自明である。It goes without saying that the same effect can be obtained with the magnetic head of this structure not only for a multi-track magnetic head having a laminated structure but also for a bulk ferrite head and a metal-in-gap structure head. The magnetic head of this structure is not only a magnetic recording device using a rotating cylinder,
A configuration in which a rotary head rotates between two fixed cylinders,
It is obvious that a similar effect can be obtained even with a multi-track magnetic head used in a configuration in which the magnetic head is fixed and the magnetic medium slides at a high speed.
発明の効果 以上の説明から明らかなように本発明の磁気ヘッド
は、先頭のヘッドチップが最後尾のヘッドチップより比
摩耗量が大きい構成のマルチトラック磁気ヘッドを用い
ることにより、常に磁気ヘッド、磁気テープ間の接触状
態を良好に維持させ、スペーシングロスによる再生出力
の低下、すなわちエンベロープの崩れを防ぐ構造となっ
ている。またヘッド摩耗が進行しても、良好なるヘッド
前面形状が維持されるものであり、極めて産業上の利用
価値が高いものである。Advantages of the Invention As is clear from the above description, the magnetic head of the present invention always uses a multi-track magnetic head having a configuration in which the first head chip has a larger specific wear amount than the last head chip, so that the magnetic head, The structure is such that the contact state between the tapes is maintained well, and the reproduction output is not reduced due to the spacing loss, that is, the envelope is not collapsed. Further, even if the head wear progresses, a good head front shape is maintained, and the industrial use value is extremely high.
第１図は本発明の一実施例における磁気ヘッド（コイル
巻回前）の斜視図、第２図はヘッドチップ部の拡大図、
第３図は本発明を用いた磁気記録装置の要部斜視図、第
４図は比較例の再生出力エンベロープ波形図、第５図は
本発明の再生出力のエンベロープ波形図である。 １……先頭の磁気ヘッドチップ、２……中間の磁気ヘッ
ドチップ、３……最後尾の磁気ヘッドチップ。FIG. 1 is a perspective view of a magnetic head (before coil winding) in one embodiment of the present invention, FIG. 2 is an enlarged view of a head chip portion,
FIG. 3 is a perspective view of a main part of a magnetic recording apparatus using the present invention, FIG. 4 is a waveform diagram of a reproduction output envelope of a comparative example, and FIG. 5 is a waveform diagram of an envelope of a reproduction output of the present invention. 1 ... top magnetic head chip, 2 ... middle magnetic head chip, 3 ... last magnetic head chip.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G11B 5/53 G11B 5/29──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G11B 5/53 G11B 5/29
Claims (5)
以上の磁気ヘッドチップを隣接して有するマルチトラッ
ク磁気ヘッドであって、回転シリンダの回転方向に対し
て先頭の磁気ヘッドチップより最後尾の磁気ヘッドチッ
プにかけて経年的な摩耗後の幅方向の曲率半径が概略同
じになるように各ヘッドチップの構成材料の比摩耗量を
異ならせたことを特徴とする磁気ヘッド。1. A multi-track magnetic head having three or more magnetic head chips adjacent to each other in one mounting window of a rotary cylinder, wherein the head is located at the end of the head in the direction of rotation of the rotary cylinder. A magnetic head characterized in that the specific wear amounts of the constituent materials of the head chips are different so that the radii of curvature in the width direction after the wear over time have become substantially the same over the magnetic head chips.
成されたバルク型磁気ヘッドチップであり、後行する磁
気ヘッドチップがそれぞれ磁路を形成する磁性体の両側
を非磁性の基板で狭持された構造を有する磁気ヘッドチ
ップであり、かつ前記非磁性の基板の比摩耗量が前記フ
ェライトの比摩耗量より大であることを特徴とする請求
項１記載の磁気ヘッド。2. The magnetic head chip of claim 1, wherein the first magnetic head chip is a bulk type magnetic head chip made of ferrite, and the subsequent magnetic head chips are respectively sandwiched on both sides of a magnetic material forming a magnetic path by a non-magnetic substrate. 2. The magnetic head according to claim 1, wherein the magnetic head chip has a specific structure, and a specific wear amount of the nonmagnetic substrate is larger than a specific wear amount of the ferrite.
の両側を非磁性の基板で狭持された構造を有する磁気ヘ
ッドチップであり、かつ前記非磁性基板の比摩耗量が先
頭の磁気ヘッドチップより最後尾の磁気ヘッドチップに
かけて順次大きいことを特徴とする請求項１記載の磁気
ヘッド。3. The magnetic head chip according to claim 1, wherein said magnetic head chip has a structure in which a magnetic material forming a magnetic path is sandwiched on both sides by non-magnetic substrates, and the specific wear of said non-magnetic substrate is higher than that of the magnetic head chip. 2. The magnetic head according to claim 1, wherein the size of the magnetic head is larger from the head chip to the last magnetic head chip.
成されたダミーヘッドであり、後行する磁気ヘッドチッ
プがそれぞれ磁路を形成する磁性体の両側を非磁性の基
板で狭持された構造を有する磁気ヘッドチップであり、
かつ前記非磁性基板の比摩耗量が前記フェライトの比摩
耗量より大であることを特徴とする請求項１記載の磁気
ヘッド。4. A structure in which a leading magnetic head chip is a dummy head made of ferrite, and a succeeding magnetic head chip is sandwiched between non-magnetic substrates on both sides of a magnetic body forming a magnetic path. A magnetic head chip having
2. The magnetic head according to claim 1, wherein the specific wear amount of the non-magnetic substrate is larger than the specific wear amount of the ferrite.
以上の磁気ヘッドを有するマルチトラック磁気ヘッドを
用いた磁気記録装置において、請求項１から４のいずれ
か１項に記載した磁気ヘッドを用いていることを特徴と
する磁気記録装置。5. A magnetic recording apparatus using a multi-track magnetic head having three or more magnetic heads in one mounting window of a rotary cylinder, wherein the magnetic head according to any one of claims 1 to 4 is used. A magnetic recording device characterized by being used.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2150950A JP2782918B2 (en) | 1990-06-08 | 1990-06-08 | Magnetic head and magnetic recording / reproducing device |
| JP2309779A JP2800400B2 (en) | 1990-11-14 | 1990-11-14 | Magnetic head and magnetic recording device |
| DE1991618441 DE69118441T2 (en) | 1990-06-08 | 1991-06-07 | Magnetic head |
| ES91109364T ES2087928T3 (en) | 1990-06-08 | 1991-06-07 | MAGNETIC HEAD. |
| EP91109364A EP0460702B1 (en) | 1990-06-08 | 1991-06-07 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2309779A JP2800400B2 (en) | 1990-11-14 | 1990-11-14 | Magnetic head and magnetic recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04178913A JPH04178913A (en) | 1992-06-25 |
| JP2800400B2 true JP2800400B2 (en) | 1998-09-21 |
Family
ID=17997150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2309779A Expired - Fee Related JP2800400B2 (en) | 1990-06-08 | 1990-11-14 | Magnetic head and magnetic recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2800400B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117720A (en) * | 1984-11-14 | 1986-06-05 | Hitachi Ltd | Magnetic head |
| JPS621108A (en) * | 1985-06-27 | 1987-01-07 | Toshiba Corp | Multi-channel type magnetic head |
-
1990
- 1990-11-14 JP JP2309779A patent/JP2800400B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04178913A (en) | 1992-06-25 |
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