JPH03183007A - Multitrack magnetic head - Google Patents
Multitrack magnetic headInfo
- Publication number
- JPH03183007A JPH03183007A JP32213389A JP32213389A JPH03183007A JP H03183007 A JPH03183007 A JP H03183007A JP 32213389 A JP32213389 A JP 32213389A JP 32213389 A JP32213389 A JP 32213389A JP H03183007 A JPH03183007 A JP H03183007A
- Authority
- JP
- Japan
- Prior art keywords
- head
- magnetic
- chips
- track
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高信号レートの記録再生に適した、クロストー
クの少ないマルチトラック磁気ヘッドに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a multi-track magnetic head with low crosstalk and suitable for recording and reproducing at high signal rates.
従来の技術
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きている。こ
の広帯域信号を記録再生するために、テープ、ヘッド間
の相対速度のアップや、マルチチャンネル化が研究され
ている。マルチチャンネルの記録再生をするためには、
回転シリンダー上の1つのヘッド取り付け窓中に複数の
ヘッドを取り付けた方が良く、テープとの均一な接触を
保持するために、ヘッドの突出形状やトラック幅方向の
Rの最適化等の工夫がなされている。2. Description of the Related Art In recent years, the development of systems that handle wideband signals such as high-definition VTRs and digital VTRs has become active. In order to record and reproduce this wideband signal, research is being carried out on increasing the relative speed between the tape and the head and on creating multiple channels. To perform multi-channel recording and playback,
It is better to install multiple heads in one head mounting window on a rotating cylinder, and in order to maintain uniform contact with the tape, it is necessary to optimize the protruding shape of the heads and the R in the track width direction. being done.
発明が解決しようとする課題
回転シリンダー上の1つのヘッド取り付け窓中に複数の
ヘッドをとりつける場合、テープとの安定な接触を図る
ためにはそれぞれのへラドチップ間隔はなるべく小さい
ほうがよい。しかしながら隣接するヘッドチップ間隔が
狭いと、ヘッド間相互のクロストークが無視できなくな
ってくる。特にギャップ近傍をノツチ加工したフェライ
トヘッドの場合、ヘッドチップ両端部の幅はトラック幅
より広いのでクロストークが大きくなりやすい。Problems to be Solved by the Invention When a plurality of heads are mounted in one head mounting window on a rotating cylinder, the spacing between the respective helad tips should be as small as possible in order to ensure stable contact with the tape. However, when the distance between adjacent head chips is narrow, crosstalk between the heads becomes impossible to ignore. In particular, in the case of a ferrite head with a notch in the vicinity of the gap, the width at both ends of the head chip is wider than the track width, so crosstalk tends to increase.
課題を解決するための手段
本発明は前記課題を解決するために、基板(ヘッドベー
ス)に平行なヘッドチップ端面に対して、斜めに非磁性
基板で両側から挟持された金属磁気コアからなるリング
形磁気ヘッドの複数のチップが、それぞれのトラックの
軌跡が互いに重なり合わない位置で1つのへラドベース
に搭載されたマルチトラック磁気ヘッドにであって、テ
ープ摺動面におけるコア幅がその他の部分より狭く、前
記金属磁気コアの走行方向の両端が前記チップ端面に露
出するようにマルチトラック磁気ヘッドを構成する。Means for Solving the Problems In order to solve the above problems, the present invention provides a ring made of a metal magnetic core sandwiched from both sides by non-magnetic substrates at an angle with respect to the head chip end face parallel to the substrate (head base). A multi-track magnetic head has a plurality of chips mounted on a single disk base at positions where the respective track trajectories do not overlap with each other, and the core width at the tape sliding surface is wider than the other parts. The multi-track magnetic head is constructed such that both ends of the metal magnetic core in the running direction are exposed to the end surface of the chip.
作用
本発明のヘッドは非磁性基板で挟持された金属磁気コア
を用いることにより、フェライトヘッドと比べて隣接す
るヘッドチップ間の磁性材の対向面積を小さくできると
ともに、前記金属磁気コアをヘッドチップ端面に対して
斜めに配し、隣接ヘントチツブの磁気コア端面間の距離
を大きくすることにより、隣接ヘッド間のクロストーク
を非常に小さくすることが可能となる。また金属磁気コ
アの端面ば隣接ヘッドとの境界面に露出していないので
、金属コアのテープとの接触長さに起因するコンタ−効
果による、ヘッド特性の周波数によるうねりもない。Function: By using a metal magnetic core sandwiched between non-magnetic substrates, the head of the present invention can reduce the facing area of the magnetic material between adjacent head chips compared to a ferrite head. By arranging the magnetic cores obliquely to each other and increasing the distance between the end faces of the magnetic cores of adjacent hent chips, crosstalk between adjacent heads can be made extremely small. Further, since the end face of the metal magnetic core is not exposed at the interface between the adjacent head, there is no frequency-dependent fluctuation in the head characteristics due to the contour effect caused by the contact length of the metal core with the tape.
実施例
以下本発明のマルチトラックヘッドの一実施例を第1図
および第2図を参照しながら説明する。Embodiment An embodiment of the multi-track head of the present invention will be described below with reference to FIGS. 1 and 2.
第1図は3つのへラドチップをヘッドベースに取り付け
たマルチトラックヘッドの斜視図、第2図はヘッド摺動
面の拡大図である。コイル4が巻線窓3に巻かれたリン
グ形の3個のへラドチップが金属あるいはセラミックス
からなるヘッドベース5の上に搭載される。アセルファ
ス磁性体やセンダストなどの強磁性金属磁性体よりなる
金属磁気コアlはへラドベース5に接着されるヘッドチ
ップの端面7に対して斜めに両側からチタン酸カルシウ
ムや結晶化ガラスなどの非磁性基板2で挟持されている
。ヘッドの磁気テープ摺動面は、そのエツジ10で斜め
に削り落とされており、金属磁気コア1のヘッド走行方
向の端面11はヘッドチップの端面7に露出している。FIG. 1 is a perspective view of a multi-track head in which three Herad chips are attached to a head base, and FIG. 2 is an enlarged view of the head sliding surface. Three ring-shaped Herad chips each having a coil 4 wound around a winding window 3 are mounted on a head base 5 made of metal or ceramics. A metal magnetic core l made of a ferromagnetic metal magnetic material such as Acelfas magnetic material or Sendust is attached to a non-magnetic substrate such as calcium titanate or crystallized glass from both sides diagonally with respect to the end surface 7 of the head chip that is adhered to the herad base 5. It is held between 2. The magnetic tape sliding surface of the head is obliquely shaved off at its edge 10, and the end surface 11 of the metal magnetic core 1 in the head running direction is exposed to the end surface 7 of the head chip.
ヘッドの磁気ギャップ6は第2図に示すようにヘッドベ
ース5に接着される端面7に対して異なる距離に形成さ
れており、このヘッドが回転シリンダーに取り付けられ
シリンダーに対して斜めに移動するテープ上に記録再生
するとき、その記録トラックが完全には重ならないよう
な位置関係になっている。金属磁気コア1はへラドチッ
プ端面7に対して斜めに形成されているので、隣接する
ヘッドチップの端面8,9における金属磁気コアの位置
はへラドチップどうしが接触している場合でも十分な距
離が離れており、ギャップ近傍がノツチ加工されたフェ
ライトヘッドのように強磁性を有する磁性体全体が対向
する構造と比べて、記録再生時のクロストークが十分に
小さく保たれる。また磁気コアの端面ばヘッドの端面に
露出しているので、ヘッドの磁気ギャップと平行になる
部分はなく、コンタ−効果や擬似ギャップなどによりヘ
ッド特性がうねることもない。特にマルチトラックヘッ
ドの場合、磁気ギャップの高さが各チップにより異なる
ので、本発明のようなテープ摺動部を狭くしない場合、
磁気コアをヘッド端面に露出させようとすると有効なヘ
ッドチップ幅が狭くなり、磁気コアとして使える部分が
減って性能が低下したりしやすい。本実施例ではヘッド
摺動面の幅を狭くする方法として、両エツジ部分を斜め
に削り落とした例を示したが、この他にダイシングソー
等による段加工でも同様の効果のある形状加工が可能で
あることは明かである。The magnetic gaps 6 of the head are formed at different distances from the end surface 7 bonded to the head base 5, as shown in FIG. When recording and reproducing data on the top, the recording tracks are positioned in such a way that they do not completely overlap. Since the metal magnetic core 1 is formed obliquely with respect to the end face 7 of the head chips, the positions of the metal magnetic cores on the end faces 8 and 9 of adjacent head chips are kept at a sufficient distance even when the head chips are in contact with each other. Compared to a structure in which the entire ferromagnetic magnetic material faces each other, such as a ferrite head in which the magnetic members are spaced apart and the vicinity of the gap is notched, crosstalk during recording and reproduction is kept sufficiently small. Further, since the end face of the magnetic core is exposed to the end face of the head, there is no part that is parallel to the magnetic gap of the head, and the head characteristics do not undulate due to contour effects or pseudo gaps. Especially in the case of a multi-track head, the height of the magnetic gap differs depending on each chip, so if the tape sliding part is not made narrower as in the present invention,
If an attempt is made to expose the magnetic core on the end face of the head, the effective width of the head chip becomes narrower, which reduces the area that can be used as the magnetic core and tends to reduce performance. In this example, as a method to narrow the width of the head sliding surface, an example was shown in which both edges were shaved off diagonally, but it is also possible to process the shape with the same effect by step processing using a dicing saw etc. It is clear that it is.
ヘッドの磁気ギャップ間隔、アジマス方向に関しては各
種組合せが可能である。例えば、アジマス0度で隣接す
る磁気ギャップ間にガートバンドとなる隙間を有する構
造や、隣接するヘッド間で逆向きのアジマスを有し磁気
ギャップ幅が記録トラックピッチより広い構造、隣接す
るヘッドのアジマスが同じで磁気ギャップのピッチが記
録トラックピッチの倍で逆アジマスの他の1組のヘッド
とスタガーに組み合わせて用いられる構造等各種のもの
が考えられるが、これらはヘッド作製時の非磁性基板と
金属磁性体の積層対から磁気ギヤツブ形成器を切り出す
方向及び、磁気ギャップ形成後へラドチップを切り出す
方向を選ぶことでいずれも作製可能である。Various combinations are possible regarding the magnetic gap distance and azimuth direction of the head. For example, there is a structure in which the azimuth is 0 degrees and there is a guard band gap between adjacent magnetic gaps, a structure in which adjacent heads have opposite azimuths and the magnetic gap width is wider than the recording track pitch, and an azimuth between adjacent heads. Various structures can be considered, such as a structure that is used in combination with another set of heads with the same magnetic gap pitch and recording track pitch and a reverse azimuth and a stagger. Both can be manufactured by selecting the direction in which the magnetic gear former is cut out from the laminated pair of metal magnetic materials and the direction in which the Radchip is cut out after the magnetic gap is formed.
本実施例ではへラドチップが密着したヘッドの例を示し
たが、ヘッドチップが分離しているヘッドの場合にも、
ヘッドチップ全体がテープと摺動する場合には不用な信
号を防止する−して、もちろん有効である。In this example, an example of a head in which the Herad chips are in close contact is shown, but in the case of a head in which the head chips are separated,
Of course, this is effective in preventing unnecessary signals when the entire head chip slides on the tape.
発明の効果
本発明によれば、一つのへラドベース上に複数のヘッド
チップを搭載したマルチトラックヘッドにおいて、隣接
するヘントチツブ間の金属磁気コアの位置を互いに直接
対向しないように設置することによりヘッド間のクロス
トークを小さく保ったままへラドチップ間隔を最小にで
きるので、ヘッド、テープ間の摺動時の接触を良好に保
つことが可能になった。又金属磁気コアの端部が記録ト
ラックにかからないので、コンタ−効果や擬似ギャップ
などの効果によるヘッド特性のうねりを生しない。Effects of the Invention According to the present invention, in a multi-track head in which a plurality of head chips are mounted on one head base, the positions of the metal magnetic cores between adjacent hent chips are arranged so that they do not directly oppose each other, thereby improving the distance between the heads. Since the spacing between the head and tape chips can be minimized while keeping crosstalk small, it has become possible to maintain good contact between the head and the tape during sliding. In addition, since the end of the metal magnetic core does not overlap the recording track, there is no waviness in the head characteristics due to effects such as contour effects or pseudo gaps.
第1図は本発明の一実施例によるヘッドの斜視図、第2
図は本発明の一実施例によるヘッドを摺動面からみた説
明図である。
I・・・・・・金属磁気コア、2・・・・・・非磁性基
板、3・・・・・・巻線窓、4・・・・・・コイル、5
・・・・・・ヘッドベース、6・・・・・・磁気ギャッ
プ、7・・・・・・端面、8,9・・・・・・ヘッドチ
ップ端面、10・・・・・・エツジ、11・・・・・・
金属磁気コアのヘッド走行方向端面。FIG. 1 is a perspective view of a head according to an embodiment of the present invention;
The figure is an explanatory diagram of a head according to an embodiment of the present invention viewed from a sliding surface. I... Metal magnetic core, 2... Non-magnetic substrate, 3... Winding window, 4... Coil, 5
...Head base, 6...Magnetic gap, 7...End face, 8, 9...Head chip end face, 10...Edge, 11...
The end face of the metal magnetic core in the head running direction.
Claims (1)
、斜めに非磁性基板で両側から挟持された金属磁気コア
からなるリング形磁気ヘッドの複数のチップが、それぞ
れのトラックの軌跡が互いに重なり合わない位置で1つ
のヘッドベースに搭載されたマルチトラック磁気ヘッド
にであって、テープ摺動面におけるコア幅がその他の部
分より狭く、前記金属磁気コアのヘッド走行方向の両端
が前記チップ端面に露出していることを特徴とするマル
チトラック磁気ヘッド。The multiple chips of a ring-shaped magnetic head consisting of a metal magnetic core sandwiched between non-magnetic substrates diagonally from both sides with respect to the end surface of the head chip parallel to the head mounting board are located at a position where their track trajectories do not overlap with each other. In a multi-track magnetic head mounted on one head base, the core width at the tape sliding surface is narrower than other parts, and both ends of the metal magnetic core in the head running direction are exposed to the chip end surface. A multi-track magnetic head characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32213389A JPH03183007A (en) | 1989-12-12 | 1989-12-12 | Multitrack magnetic head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32213389A JPH03183007A (en) | 1989-12-12 | 1989-12-12 | Multitrack magnetic head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03183007A true JPH03183007A (en) | 1991-08-09 |
Family
ID=18140300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32213389A Pending JPH03183007A (en) | 1989-12-12 | 1989-12-12 | Multitrack magnetic head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03183007A (en) |
-
1989
- 1989-12-12 JP JP32213389A patent/JPH03183007A/en active Pending
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