JPS5819715A - Vertical magnetic head for tape - Google Patents

Abstract

PURPOSE:To obtain a high-grade VTR, by setting the thickness of a main magnetic pole at a value equal to or smaller than the thickness of a layer having a high degree of permeability for a combination head containing a reinforced core part having much smaller degree of saturated magnetization than the magnetic pole for a vertical head of a magnetic tape containing a highly permeable layer. CONSTITUTION:The tip face of a main magnetic pole 5 is adhered with the tip of a reinforced core 7. The reinforced core material uses the ferrite of a soft magnetic material, etc., and the main magnetic pole is vapor-deposited with ''Sendust '', etc. The thickness of the pole 5 is set at a value equal to or smaller than a highly permeable layer 2 in case when the medium consists of a vertical recording layer 1, the layer 2 and a base 3. The magnetic fluxes passing through the core 7 among those generated at a coil part are concentrated at the tip of the pole 5 to produce an intensive vertical magnetic field. Thus the vertical recording of high density is possible with only an operation carried out through a single side of a tape. In such way, a VTR of a high grade is obtained.

Description

【発明の詳細な説明】 本発明は、框直磁化記ｆ、、／方式において、磁気テー
プの片側から操作できる単磁極磁気ヘッドに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-pole magnetic head that can be operated from one side of a magnetic tape in a rectangular magnetization system.

高密度デジクルおよびＦ　Ｍ　ｉｊ２　録に適したこの
垂直方式のヘッドとして、従来膜も効率よく記録両生で
きるものとして２図１の補助磁極励磁型単極ヘッドが用
いられている。先に本発明者は、媒体の片側から使える
ものとして９図２の厚い（非平行）、ｌｉ極ヘッドを特
訓−昭５６−０１．７２２４号出願において提供したが
、これは厚い高導磁率層をとることのできるハードディ
スクには影像効果が効率よく働くが、磁気テープでは構
造上高導磁率層は厚くとれないので１図３のようにテー
プを−１さんでヘッドと反対側に影像コア（２１）を設
置して影像効果を強化しなければならない。その設置は
、固定ヘッドの場合は容易たが１回転ヘツｌ’を用いる
Ｖ　Ｔ　ＩＬの場合には困！Ｊ、ｌｌである。As this perpendicular type head suitable for high-density digital recording and F M ij2 recording, the auxiliary magnetic pole excitation type monopole head shown in FIG. 2 is used because it can efficiently perform both recording and recording using conventional films. Previously, the present inventor provided a thick (non-parallel) Li-pole head as shown in Fig. 2, which can be used from one side of the medium, in the Special Training Application No. 1972-01.7224. The image effect works efficiently on hard disks that can take a magnetic field, but because of the structure of magnetic tape, the high magnetic permeability layer cannot be made thick. Therefore, as shown in Figure 3, the image core ( 21) must be installed to strengthen the image effect. Installation is easy with a fixed head, but difficult with a V TIL that uses a one-turn head l'! J, ll.

本発明者は現行の＼Ｉ　ｉ”　Ｉｔ方式にそのま＼取入
れることのできる車ユ直磁気ヘツＩパを考案し、先に１
．１願−昭５６−０６７３２８け出願に、し・いて提供
した訓導磁層付垂直塗膜テープ、或は従来から用いられ
ているＣｏ　−ＣｒとパーマＩ］イの二層蒸着媒体と組
合せて、Ｖ’Ｉ”ｌＬの面直方式による高密度化を実現
しようとするものである。The present inventor devised a direct magnetic head I-P for a vehicle that can be directly incorporated into the current \I i'' It system, and first
．． In combination with the perpendicular coating tape with magnetic layer provided in Application No. 1-1988-067328, or the conventionally used two-layer deposition medium of Co--Cr and Permanent I, This is an attempt to realize high density V'I''lL using a perpendicular method.

一般にテープの高導磁率層厚は塗膜テープで数／’　＋
　蒸着テープで≦ｌ　／／である。これが影像作用をす
るためには７図４において、〔主磁極厚〕厄（高導磁率
層厚）、（主磁極飽和磁化）Ｓ　（ｉｊ’４ｉ導磁率層
導磁磁層飽和磁化ればならない。Generally, the thickness of the high magnetic permeability layer of a tape is several /' +
For vapor deposition tape, ≦l //. In order for this to have an image effect, in Figure 4, [main magnetic pole thickness] (high magnetic permeability layer thickness), (main magnetic pole saturation magnetization) S (ij'4i magnetic permeability layer, magnetic permeability layer saturation magnetization) .

しかし片側から記録できる単極ヘッドとしてはコイル部
とヘット先端との間の磁束流の伝達率をよくするため補
強コア（７）が必要である。これら両コアを抱合せだ形
は、高い記録効率と。However, for a single-pole head capable of recording from one side, a reinforcing core (7) is required to improve the transmission rate of magnetic flux between the coil portion and the tip of the head. The combination of these two cores provides high recording efficiency.

摩耗に対する記録特性不変の要求から媒体と接する面を
揃えたものとなる。Due to the requirement that the recording characteristics remain unchanged against wear, the surfaces that come into contact with the medium are aligned.

この構造で、主磁極（５）側から流出する媒体に強い垂
直記録磁界がかかるためには、磁束は主磁極先端のみに
集中して媒体に流入し、補強コアから直接流入して高導
磁率層を飽和させる分はなるへく少くしなければならな
い。そのためにはコイル＼起磁力による先端の磁化がつ
くる垂直磁界が、主磁極の所では媒体の抗磁力以寸−と
なり補強コアの所ではそれ以下となるように。With this structure, in order for a strong perpendicular recording magnetic field to be applied to the medium flowing out from the main magnetic pole (5) side, the magnetic flux must be concentrated only at the tip of the main magnetic pole and flow into the medium, and then directly from the reinforcing core to achieve high magnetic permeability. The amount that saturates the layer must be minimized. To do this, the perpendicular magnetic field created by the magnetization of the tip of the coil due to the magnetomotive force should be greater than or equal to the coercive force of the medium at the main pole and less than that at the reinforcing core.

画状磁性コアの飽和磁化の比がなるべく大きくなるよう
にえらぷ。Make sure that the saturation magnetization ratio of the image-shaped magnetic core is as large as possible.

消磁されている媒体が主磁極の所で先づ磁化されると、
主磁極と高導磁率層の相互作用が強まり、ますます強く
鋭い垂直記録磁界が発生し。When a demagnetized medium is first magnetized at the main pole,
The interaction between the main pole and the high magnetic permeability layer becomes stronger, generating an increasingly strong and sharp perpendicular recording magnetic field.

結局コイル部からの磁束のうち補強コアを通るものも主
磁極先端に集中するように流入し、その結果飽和に迄磁
化されたその先端は強い垂直磁界を発生する。In the end, the magnetic flux from the coil section that passes through the reinforcing core also flows into the main pole tip in a concentrated manner, and as a result, the tip magnetized to saturation generates a strong perpendicular magnetic field.

補強コア刊としては軟磁性フェライト等、主磁極として
はセンタスト等を蒸着したものが適している。主磁極と
補強コアの厚みは、媒体が塗膜テープの場合はそれぞれ
数μと数＋μ〜数百μ、蒸着テープの場合はそれぞれＯ
，％μ〜Ｉツノと十ｌＩ〜数百ｌｌとする。For the reinforcing core, soft magnetic ferrite or the like is suitable, and for the main pole, a material deposited with centast or the like is suitable. The thickness of the main pole and reinforcing core is several microns and several + microns to several hundred microns, respectively, when the medium is coated tape, and O when the medium is vapor-deposited tape.
,%μ~I horn and 10 lI~several hundred ll.

１ｆ生には、ギャップ損失的限界がなく片側からの両生
効率のよい厚い非平行単１１ム２ヘツド（特訓−昭５６
　０１．７２２４吋）を用い２図５のように記録ヘッド
の主磁極側面と再生ヘッドの一側面が平行になるように
組合せた複合ヘッドの形で使用する。For 1F, there is no limit in terms of gap loss, and a thick non-parallel single-element 11 mm 2-head with good bidirectional production efficiency from one side (Special training - 1983) is used.
01.7224 inches) and is used in the form of a composite head in which the main magnetic pole side of the recording head and one side of the reproducing head are parallel to each other as shown in FIG.

のようなテープ接触面での形とする。The shape of the tape contact surface should be as follows.

蒸着テープの場合、主磁極がうすいので１両コアの実効
透磁率に大差がなければ２両コアの境界から発生する余
分の信号は無視できるため図７の実施例のように録再兼
用の簡略型も可能である。また塗膜テープやフロッピー
ディスクのように高導磁率層が厚い場合は、非平行単極
主磁極をテープ進行方向に長くとって、その狭い厚みを
トラック［１〕とした図８の実施例のような録再兼用ｋ
ｋＫ型も可能である。In the case of vapor-deposited tape, since the main magnetic pole is thin, the extra signal generated from the boundary between the two cores can be ignored unless there is a large difference in the effective magnetic permeability of the two cores. Types are also possible. In addition, when the high magnetic permeability layer is thick like a coated tape or a floppy disk, the non-parallel single-pole main pole is made long in the tape traveling direction, and the narrow thickness is used as the track [1] in the embodiment shown in FIG. Like recording/playback k
A kK type is also possible.

次に」―述の特許請求範囲第１項の発明に関連してなさ
れた第２項の発明についてのべる。Next, the invention of claim 2, which has been made in relation to the invention of claim 1, as stated in "-" will be described.

ＶＴＲシステムを垂直媒体を用い垂直記録化する場合、
映像のＩｉ”　Ｍ信号の記録については」−述の如く高
密度化ができるが、音声のＡＣバイアスアナログ記録方
式の方は垂直媒体と適合しない。さらに一般に映像の高
密度化がすすみテープ速度がおそくなると、それにとも
なって音声チャンネルの固定ヘッドに対する走行速度も
おそくなり、映像の画質にくらべてアンバランスな程合
質が悪くなる。When converting a VTR system to perpendicular recording using a perpendicular medium,
Regarding the recording of video Ii''M signals, high density can be achieved as described above, but the audio AC bias analog recording system is not compatible with vertical media. Furthermore, as video densities generally become higher and tape speeds become slower, the running speed of the audio channel relative to the fixed head also slows down, resulting in unbalanced quality of the tape compared to the image quality of the video.

この発明は、音声チャンネルもＦＭ或はデジタル記録化
してヘリカル走査等を行うことによる音声映像とも高品
質の新しいＶＴＲ・方式と。This invention is a new VTR/system that produces high quality audio and video by converting the audio channel into FM or digital recording and performing helical scanning.

これを可能とする映像音声２チヤンネルマルチ垂直ヘツ
ドの構造に関するものである。This invention relates to the structure of a two-channel multi-vertical head for video and audio that makes this possible.

図９は映像と音声をアジマス角度を保って隣接して同時
に録再する２チャンネルマルチヘッドｆ、図６の録再複
合ヘッド２ケを、アジマス角および記録トラック隣接の
相互関係を調整して一つに組合せたものである。Figure 9 shows a two-channel multi-head f that simultaneously records and reproduces video and audio adjacently while maintaining the azimuth angle, and the two recording/reproducing composite heads in Figure 6 are integrated by adjusting the azimuth angle and the mutual relationship between adjacent recording tracks. It is a combination of

図１．　Ｏａは回転シリンダーに取付けられた２七ノド
のＩ’−ｉ１己２チャンネルヘット配置を示すものであ
る。図１０１）はそのトラックのアンマス関係を示すも
のてＶは映像，Ａは昌″ｊ１１チャン不ルヲ示ｔ　ｃ、 このＶ　ｉ’　Ｒ．をオーディオＰ　（シＭのプレイヤ
ー＼Ｉ　ｉ’　Ｉｔ．を良１゛・１−質をＩＩ的とぜず
長１１．１１間録画の目的に使う場合に映像用ヘッドと
して使うことができる。この場合，テープは長手配向或
は無配向りである。これらシンクルチャンネルヘッド一
つの場合のアジマス関係を図ｉｏｃｊｐ・よびｄに示す
。Figure 1. Oa shows a 27-node I'-i1 two-channel head arrangement attached to a rotating cylinder. Figure 101) shows the unmasking relationship of the track. It can be used as a video head when the tape is used for the purpose of long-distance recording.In this case, the tape may be longitudinally oriented or non-oriented. The azimuth relationship in the case of one of these single channel heads is shown in Figures iocjp and d.

以上．のように本発明は，垂直高密度記録を。that's all. The present invention enables vertical high-density recording.

テープの片側だけからの操作で行うことができるヘッド
であるから，現行のＶ　ｌ”　１１，機器規格を殆んど
変えないで高密度化が可能となる。また（７） 置と各ヘッドのアジマス関係を示す。Since the head can be operated from only one side of the tape, it is possible to increase the density without changing the current equipment specifications. Indicates azimuth relationship.

音声映像ともにマルチチャンネル高密度ＦＭ　記録がで
きて，両者とも高品位のＶ　Ｔ　ＩＩ，を実現すること
ができる。Multi-channel high-density FM recording is possible for both audio and video, and both can achieve high-quality VT II.

従ってその産業」−の実用的価値は極めて太きい。なお
この方式はコンピューター用テープおよびフロッピーデ
ィスクにも適用できるものであることを付言する。Therefore, the practical value of this industry is extremely significant. It should be noted that this method can also be applied to computer tapes and floppy disks.

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

図１は補助磁極励磁型単極ヘット゛，図２はコイル付の
厚い非平行ヘッドとハードディスク。 図３はテープ媒体と影像コアの組合せを示す。 図４は抱合せｌｉ極記行ヘッド、図５は」−記の抱合せ
記録ヘッドと厚い非平行再生単極ヘッドとの複合ヘッド
、図６は図５を狭トラック用としアジマスをつけたもの
，図７は録再兼用の簡略型ヘッド（蒸着テープ用）、図
８は録再兼用め飢へヘッド（塗膜テープ、フロッピーデ
ィスク用）、図９は映像と音声のマルチチャンネルヘツ
ド，　図１　０は回転シリンダー」二のヘッドの配（８
） ■・・垂直記録層，２・・・高導磁率層，３・・ベース
４・・補助磁極，５・・・主磁極，６・・・厚い非平行
単極ヘッド、６′・両生専用単極ヘット、７・補強コア
、２１・・・影像コア ケ　１０ の ９５−Figure 1 shows an auxiliary pole-excited single-pole head, and Figure 2 shows a thick non-parallel head with a coil and a hard disk. FIG. 3 shows a combination of tape media and image core. FIG. 4 shows a combined li-polar recording head, FIG. 5 shows a composite head of a combination recording head and a thick non-parallel reproducing single-pole head, and FIG. 7 is a simplified recording/playback head (for vaporized tape), Figure 8 is a recording/playback head (for coated tape, floppy disks), Figure 9 is a multi-channel head for video and audio, and Figure 10 is a "Rotating cylinder" 2nd head arrangement (8
) ■... Perpendicular recording layer, 2... High magnetic permeability layer, 3... Base 4... Auxiliary magnetic pole, 5... Main magnetic pole, 6... Thick non-parallel single pole head, 6' - Amphib only Monopolar head, 7・Reinforcement core, 21...Image core ke 10 of 95-

Claims (1)

【特許請求の範囲】 強コア先端面とを媒体に接するように揃えて接着し、主
磁極コアが媒体の抗磁力を越えて記録残留磁化を残すよ
うな記録電流値に対し、補強コア部分は媒体に残留磁化
が残らぬよう、補強コアの飽和磁化を主磁極のそれより
著しく小さくなるように両コアの磁性相をえらんてなる
抱合せヘッドにおいて、主磁極の厚みを高導磁率層と同
程度或はそれ以下とする構造。 を２ヶ絹合せた映像および音声の２チャンネルマルヂヘ
ソトの構造。[Claims] The reinforced core portion is bonded so that the leading end surface of the strong core is aligned with the medium so that the main pole core exceeds the coercive force of the medium and leaves recording residual magnetization. In order to prevent residual magnetization from remaining in the medium, the magnetic phases of both cores are selected so that the saturation magnetization of the reinforcing core is significantly smaller than that of the main pole, and the thickness of the main pole is the same as that of the high magnetic permeability layer. or a structure with less than that. The structure is a two-channel video and audio system that combines two channels.