JPS5927986B2 - floating head - Google Patents
floating headInfo
- Publication number
- JPS5927986B2 JPS5927986B2 JP758080A JP758080A JPS5927986B2 JP S5927986 B2 JPS5927986 B2 JP S5927986B2 JP 758080 A JP758080 A JP 758080A JP 758080 A JP758080 A JP 758080A JP S5927986 B2 JPS5927986 B2 JP S5927986B2
- Authority
- JP
- Japan
- Prior art keywords
- head
- gap
- recording
- floating
- groove
- 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.)
- Expired
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
- G11B5/127—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
- G11B5/1871—Shaping or contouring of the transducing or guiding surface
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Description
【発明の詳細な説明】
本発明は、テープまたはフロッピディスク等の可撓磁気
記録媒体に対して、記録再生用ヘッドを微小且つ一定の
すきまで位置付ける媒体浮上形ヘッドに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a medium floating head that positions a recording/reproducing head to a flexible magnetic recording medium such as a tape or a floppy disk to a minute and constant gap.
さらに直接的には、回転ヘッド形磁気テープ記録装置に
おいて、サブミクロンのすきまで高信頼に走査できるテ
ープ浮上形ヘッドに関するものである。従来、この種の
テープ浮上形ヘッドには、第1図に示すように、ヘッド
ブロック1の磁気テープに対向する対向面を球面または
擬似球面に形成し、この球面または擬似球面の頂点近傍
に記録再生ギャップ2を形成し、且つその記録再生ギャ
ップ2の両側に球面のテープに対するヘッドの相対的進
行方向(以下、ヘッド進行方向ということもある。More directly, the present invention relates to a floating tape head that can reliably scan down to submicron gaps in a rotating head magnetic tape recording device. Conventionally, in this type of tape floating head, as shown in FIG. 1, the opposing surface of the head block 1 that faces the magnetic tape is formed into a spherical or pseudo-spherical surface, and recording is performed near the apex of this spherical or pseudo-spherical surface. A reproduction gap 2 is formed, and a spherical tape is formed on both sides of the recording/reproduction gap 2 in the relative traveling direction of the head (hereinafter also referred to as the head traveling direction).
)における前端から後端にかけて前記対向面に中央ラン
ド部3とサイドランド部6とが形成されるように2本の
溝4、4を設けたものがあつた。この溝付球面一、ツド
においては、2本の溝で挾まれた中央ランド部3の幅を
250〜300μmとすると、中央ランド部の頂点から
1〜1.5mmヘッド進行方向における後端に0.1〜
0.15μmの最小すきまが生じ、また頂点近傍の広い
領域に亘つて0.3〜0.5μmの均一なすきまが形成
される。したがつてこの均一すきま領域に記録再生ギャ
ップ2を設けることにより、トラック幅250〜300
pm)浮上すきま0.3〜0.5μmのテープ浮上形ヘ
ッドを実現することが可能であつた。しかしこの形式の
ヘッドでは浮上面のヘッド進行方向における前後部に局
部的に最小すきまが生じ、また中央ランド部3の幅を2
00μm以下にすると、最小すきま位置ではテープとヘ
ツドとが接触するようになるため、狭トラツク化、微小
すきま化には適していなかつた。即ちトラツク幅200
μm以下の狭トラツクヘツドは、磁気コアを中央ランド
部内に埋込む形式とならざるを得ないため加工コストが
増大する。一方高い信頼性を維持しつつ記録再生ギヤツ
プ部分のすきまを微小化するには、記録再生ギャツプを
最小すきま位置に設けることが望ましい。しかし最小す
きま領域は狭く、且つ走査条件のばらつきによりその位
置が移動するため、記録再生ギヤツプを最小すきま位置
に設けることができなかつた。これに対して球面頂点か
らヘツド進行方向における後端までの距離を1mm程度
に短くし、最小すきまを強制的に中央ランド部のヘツド
進行方向における後端に生じさせ、ここに中央ランド幅
より小さいトラツク幅の記録再生ギャツプを形成させる
第2図に示す形式の溝付球面ヘツドが特願昭53−83
470号に開示されている。), two grooves 4, 4 were provided so that a central land portion 3 and a side land portion 6 were formed on the opposing surfaces from the front end to the rear end. In this grooved spherical surface, if the width of the central land 3 sandwiched between the two grooves is 250 to 300 μm, the rear end of the central land 3 in the direction of head movement is 1 to 1.5 mm from the apex of the central land. .1~
A minimum gap of 0.15 μm is created, and a uniform gap of 0.3 to 0.5 μm is formed over a wide area near the apex. Therefore, by providing the recording/reproducing gap 2 in this uniform gap area, the track width can be increased from 250 to 300 mm.
pm) It was possible to realize a tape floating head with a flying clearance of 0.3 to 0.5 μm. However, in this type of head, there is a local minimum clearance between the front and rear parts of the air bearing surface in the direction of head movement, and the width of the central land portion 3 is reduced by 2.
If it is less than 00 μm, the tape and head will come into contact at the minimum gap position, which is not suitable for narrowing tracks and making minute gaps. i.e. track width 200
In the case of a narrow track head of less than .mu.m, the magnetic core must be embedded in the central land portion, which increases the processing cost. On the other hand, in order to minimize the gap in the recording/reproducing gap while maintaining high reliability, it is desirable to provide the recording/reproducing gap at the minimum gap position. However, since the minimum gap area is narrow and its position moves due to variations in scanning conditions, it has not been possible to provide the recording/reproducing gap at the minimum gap position. In contrast, the distance from the spherical apex to the rear end in the direction of head movement is shortened to about 1 mm, and a minimum gap is forcibly created at the rear end of the central land in the direction of head movement, which is smaller than the width of the central land. A grooved spherical head of the type shown in Fig. 2 which forms a recording/reproducing gap of track width was disclosed in a patent application filed in 1983-1983.
No. 470.
なお、第2図において第1図に示す構成要素と同一の要
素には同一符号を付してある。またこの第2図において
符号7は巻線コア、8は巻線、9はヘツドプロツク浮上
面の頂点である。この形式のヘツドでは、第3図にテー
プ浮上すきまの等すきま曲線11を示すように、中央ラ
ンド部3のヘツド進行方向における後端に最小すきまが
生ずる。したがつて、この形式のヘツドは第1図のヘツ
ド形式にくらべて最小すきま位置に記録再生ギャツプ2
を一致させることができ、また狭いトラツク幅の記録再
生ギヤツプが比較的容易に形成できるという特長を有す
る。しかしテープ張力、ヘツドのテープへの押込量、ヘ
ツド形状および設定位置等の走査条件の変動に対する動
作余裕度は必ずしも大きくなく、その信頼性になお問題
があつた。そしてその原因は中央ランド部3に発生する
テープ浮上圧力が小さいため、0.5μm以下の浮上す
きま領域が球面頂点からヘツド進行方向における前方に
亘り不必要に長くなることおよび記録再生ギャップ部分
のテープ浮上すきまが0.1μm以下に小さくなりすぎ
ることにあつた。また球面頂点と記録再生ギャツプ部分
との距離が1mm前後と短いので、ヘツドの進行方向に
おける後端部でテープが急激に変形し、ヘツドとテープ
とが接触しやすいことにもよつていた。そして中央ラン
ド面のテープ浮上圧力を高めるため、中央ランド部3の
幅を大きくすると、ランド面中央のすきまが大きくなり
、ランド部の浮上すきまが幅方向にそつて不均一になる
という問題が生じていた。またこのヘツドにおいては、
浮上特性に影響を与えずにトラツク幅を任意の幅に設定
することができないという欠点があつた。本発明は上記
の事情に鑑みてなされたもので、上記従来のヘツドの欠
点を除去した浮上形ヘツドを提供することを目的とする
ものであり、可撓性記録媒体との対向面が球面ないし擬
似球面をなす媒体浮上形ヘツドにおいて、前記対向面の
可撓性記録媒体に対するヘツドの相対的進行方向におけ
る後端部に記録再生ギャツプを形成し、且つこの対向面
の可撓性記録媒体に対するヘツドの相対的進行方向にお
ける後縁から同進行方向にそつて前方に伸び、その先端
が対向面内で閉じた2本の溝を部分的に形成し、前記対
向面の可撓性記録媒体に対するヘツドの相対的進行方向
における後端部に、前記記録再生ギャツプが形成されて
いる部分の両側において所望のトラツク幅だけ離間し、
且つ対向面の可撓性記録媒体に対するヘツドの相対的進
行方向における後方に向つて深くなるように傾斜した2
本の傾斜溝を形成したことを特徴とするものである。In FIG. 2, the same elements as those shown in FIG. 1 are given the same reference numerals. Further, in FIG. 2, numeral 7 is a winding core, 8 is a winding, and 9 is the apex of the air bearing surface of the head block. In this type of head, as shown in FIG. 3 by an equal gap curve 11 of the tape floating gap, a minimum gap occurs at the rear end of the central land portion 3 in the direction in which the head travels. Therefore, compared to the head type shown in Figure 1, this type of head has a recording/reproducing gap 2 at the minimum gap position.
It also has the advantage that a recording/reproducing gap with a narrow track width can be formed relatively easily. However, the operating margin against variations in scanning conditions such as tape tension, the amount of push of the head into the tape, the shape and setting position of the head, etc., was not necessarily large, and there were still problems with its reliability. The reason for this is that because the tape floating pressure generated in the central land portion 3 is small, the floating gap region of 0.5 μm or less becomes unnecessarily long from the apex of the spherical surface to the front in the direction of head movement, and the tape in the recording/reproducing gap portion The floating clearance became too small to 0.1 μm or less. Furthermore, since the distance between the apex of the spherical surface and the recording/reproducing gap portion is short, about 1 mm, the tape deforms rapidly at the rear end in the direction of movement of the head, making it easy for the head and tape to come into contact. If the width of the central land portion 3 is increased in order to increase the floating pressure of the tape on the central land surface, the gap at the center of the land surface will increase, causing the problem that the floating gap of the land portion will become uneven along the width direction. was. Also, in this head,
The drawback was that the track width could not be set to a desired width without affecting the flying characteristics. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floating head that eliminates the drawbacks of the conventional heads described above, in which the surface facing the flexible recording medium is spherical or In the floating medium head having a pseudo-spherical surface, a recording/reproducing gap is formed at the rear end in the direction of movement of the head relative to the flexible recording medium on the opposing surface, and The recording medium partially forms two grooves extending forward in the relative traveling direction from the trailing edge in the relative traveling direction, the tips of which are closed within the opposing surface, and forming a head for the flexible recording medium on the opposing surface. spaced apart by a desired track width on both sides of the portion where the recording/reproducing gap is formed at the rear end in the relative traveling direction of the recording/reproducing gap;
2 which is inclined so as to become deeper toward the rear in the direction of relative movement of the head with respect to the flexible recording medium on the opposing surface.
It is characterized by the formation of book-slanted grooves.
以下、図面について詳細に説明する。The drawings will be described in detail below.
第4図は本発明の実施例であつて、この図において符号
1はヘツドプロツク、2はヘツドプロツク1の磁気テー
プ(可撓性記録媒体)に対する対向面のヘツド進行方向
における後端部に形成された記録再生ギャツプ、3は中
央ランド部、4aは上記対向面のヘツド進行方向におけ
る後縁から同進行方向に沿つて前方に述び、その先端が
対向面内で閉じた浮上すきまを制御する部分溝、6はサ
イドランド部、7は巻線コア、8は巻線、9はヘツドプ
ロツク浮上面の頂点、10は前記記録再生ギヤツプ2が
形成されている部分の両側において所望のトラツク幅だ
け離間し、且つ対向面のヘツド進行方向における後方に
向つて深くなるように傾斜した2本の傾斜溝であつて、
対向面のヘツド進行方向の後端部に設けられた記録再生
ギヤツプ2のトラツク幅を形成するための傾斜溝である
。FIG. 4 shows an embodiment of the present invention, in which reference numeral 1 indicates a head block, and 2 indicates a head block formed at the rear end of the surface of the head block 1 facing the magnetic tape (flexible recording medium) in the direction in which the head travels. Recording/reproducing gap, 3 is a central land portion, 4a is a partial groove extending from the rear edge of the opposing surface in the direction of head movement forward along the same direction, and whose tip is closed within the opposing surface to control the flying gap. , 6 is a side land portion, 7 is a winding core, 8 is a winding wire, 9 is an apex of the air bearing surface of the head block, 10 is spaced apart by a desired track width on both sides of the portion where the recording/reproducing gap 2 is formed; and two inclined grooves which are inclined so as to become deeper toward the rear in the head traveling direction on the opposing surfaces,
This is an inclined groove for forming the track width of the recording/reproducing gap 2 provided at the rear end of the opposing surface in the direction of head movement.
なお、以下の説明で、前端、後端、後縁、前方、後方の
語句は、前述した第1図ないし第3図の説明と同じく磁
気テープに対するヘツドの相対的進行方向における前端
、後端、後縁、前方、後方の意味である。ヘツドプロツ
ク1の磁気テープに対する対向面は、この対向面を磁気
テープ面に数十μm程度押し込んで走査することにより
磁気テープと対向面との間に空気軸受の原理により浮上
圧力が生ずるよう、曲率半径15〜25mmの球面ない
し擬似球面となつている。In the following explanation, the words front end, rear end, trailing edge, front, and rear mean the front end, rear end, It means trailing edge, front, and rear. The surface of the head block 1 facing the magnetic tape has a radius of curvature so that floating pressure is generated between the magnetic tape and the facing surface by the principle of air bearing by pushing this facing surface into the magnetic tape surface by several tens of μm and scanning. It is a spherical or pseudo-spherical surface of 15 to 25 mm.
浮上面は2本の部分溝4aで中央ランド部3とサイドラ
ンド部6に分割されているが、浮上面前方では連続して
おり、これは従来とは異なる本発明の特徴である。浮上
面後端に開放したこのような部分溝4aは、ヘツドプロ
ツク1の後端を持ち上げるように傾斜させ、溝研削ホイ
ールを水平に移動させることによつて容易に形成するこ
とができる。2本の部分溝4aの長さは1〜3.5mu
程度、溝幅は数十μmから百数十μm程度、溝深さは浮
上面後端で200〜300μm程度が適当である。Although the air bearing surface is divided into a central land portion 3 and a side land portion 6 by two partial grooves 4a, they are continuous in front of the air bearing surface, which is a feature of the present invention that is different from the conventional one. Such a partial groove 4a open at the rear end of the air bearing surface can be easily formed by tilting the rear end of the head block 1 so as to lift it and moving the groove grinding wheel horizontally. The length of the two partial grooves 4a is 1 to 3.5 mu
Appropriately, the groove width is from several tens of micrometers to a hundred and several tens of micrometers, and the groove depth is approximately 200 to 300 micrometers at the rear end of the air bearing surface.
また中央ランド部3の幅は200〜400!Tm程度が
適当で、これらの諸元の最適値はへツド走査諸条件、磁
気テープの物理定数に依存する。中央ランド部3の後端
の記録再生ギヤツプ2の形成には既に周知の各種の方法
を用いることができる。Also, the width of the central land portion 3 is 200 to 400! Approximately Tm is appropriate, and the optimum values of these parameters depend on head scanning conditions and physical constants of the magnetic tape. Various known methods can be used to form the recording/reproducing gap 2 at the rear end of the central land portion 3.
第4図の実施例では、ギャツプ部および巻線部を加工し
た2つの磁気コアプロツクをガラス接着することにより
記録再生ギャツプを形成し、浮上面を球面加工した後、
研削加工により巻線コアおよびトラツク幅形成を行う実
施例を示している。特に浮上面に対して30う前後傾斜
した溝を加工することによりトラツク幅を高精度に形成
する方法は新規なもので、第5図に第4図の記録再生ギ
ヤツプ部分の上面の、また第6図に傾斜溝10にそつて
の断面の詳細を示す。傾斜溝10の浮上面におけるギャ
ツプからの長さlおよび幅bは、記録再生ギヤツプ近傍
の浮上圧力の低下を防ぐため小さい方がよく、いずれも
100μm以下が望ましい。In the embodiment shown in FIG. 4, a recording/reproducing gap is formed by glass-bonding two magnetic core blocks with processed gap parts and winding parts, and after processing the air bearing surface into a spherical shape,
An example is shown in which the winding core and track width are formed by grinding. In particular, the method of forming track widths with high precision by machining grooves that are inclined about 30 degrees with respect to the air bearing surface is new. FIG. 6 shows details of the cross section along the inclined groove 10. The length l and width b of the inclined groove 10 from the gap on the air bearing surface are preferably small in order to prevent a drop in flying pressure in the vicinity of the recording/reproducing gap, and both are preferably 100 μm or less.
一方電磁変換特性の観点から、傾斜溝10の縁形状は記
録再生ギヤツプ部分で直線的で、且つその前方では、溝
縁の擬似ギャツプ効果によるクロストークを抑制するた
め、なめらかな円弧状となつていることが望ましい。そ
こで例えば厚さ80μmの研削ホイールで、傾斜角30
例でl−100ttmとなるよう溝加工すれば、ギヤツ
プ前方20μmまで平行溝が形成され、その前方では長
径80μmの半楕円形の溝縁が形成される。記録再生ギ
ャツプ部分の溝深さは50μm以上で、溝先端の浮上面
と溝壁との角度は1500と大きいので、これらの位置
での擬似ギヤツプ効果は著しく低減されている。以上の
ように構成された浮上形ヘツドを回転走査ヘツドとして
用いると、浮上面には第7図に示すような等すきま分布
が得られる。On the other hand, from the viewpoint of electromagnetic conversion characteristics, the edge shape of the inclined groove 10 is straight at the recording/reproducing gap part, and in front thereof, it becomes a smooth arc in order to suppress crosstalk due to the pseudo gap effect of the groove edge. It is desirable to be present. For example, if you use a grinding wheel with a thickness of 80 μm and an inclination angle of 30 μm,
For example, if the groove is machined to l-100 ttm, a parallel groove will be formed up to 20 μm in front of the gap, and a semi-elliptical groove edge with a major diameter of 80 μm will be formed in front of the parallel groove. The groove depth at the recording/reproducing gap portion is 50 μm or more, and the angle between the air bearing surface at the tip of the groove and the groove wall is as large as 1500, so the pseudo gap effect at these positions is significantly reduced. When the floating head constructed as described above is used as a rotary scanning head, an equal gap distribution as shown in FIG. 7 is obtained on the floating surface.
即ち浮上すきまた浮上面の前方の溝のない領域では溝の
ない球面と同様に数μm以上となり、溝の先端付近から
後方にかけて単調に減少し、記録再生ギヤツプ位置で最
小値をとる。第7図と第3図と比較すれば分るように、
浮上面前方領域の浮上すきまが増大し、サブミクロンの
微小すきま領域は浮上面後方領域に制限されている。ま
た浮上面には長く狭まいすきま領域が形成されるため、
中央ランド部3後方には高い浮上圧力が発生する。した
がつてヘツドのテープへの押込量を大きくでき、また記
録再生ギャツプ2近傍の空気膜剛性も高まるために、記
録再生ギャツプ2位置の浮上すきまがヘツド走査諸条件
の変動の影響を受けない安全な浮上形ヘツドが実現でき
る。部分溝4aの後端からの長さを長くすると、第7図
の浮上すきま分布は次第に第3図のそれに近づく。そし
て同時に浮上面に発生する圧力も低下するため、記録再
生ギヤツプ部分のすきまも0.1μm以下となる。一方
溝4aの長さを短くすると、第7図の等すきま線11の
間隔は小さくなり、中央ランド部3後端のすきまは急激
に減少するようになる。これは記録再生ギャツプ部2の
テープが急激な変形を受けていることを意味し、巻線コ
ア7の浮上面にテープが接触する可能性が増大する。こ
のため部分溝4aの長さは上述のように1〜3,51L
m程度が適当である。本発明の浮上形ヘツドの他の利点
は浮上面頂点9からの記録再生ギヤツプ2位置までの距
離を第2図に示す従来のヘツドにくらべ1.5〜2.5
韮程度に大きくすることができることである。これは浮
上面前方のテープが持ち上げられるため、最小すきま位
置が後方へ移動するためで、これによつて浮上形ヘッド
の設定、調整時などに記録再生ギャツプ部分を損傷させ
る確率を著しく減することができる。本発明のさらに他
の利点は、最小すきまの大きさを、部分溝4aの長さと
幅および中央ランド部3の幅を適当に選ぶことにより、
0.05〜0.5μmの範囲の所望の値に決めることが
できることである。That is, in the groove-free area in front of the air-bearing surface, it is several μm or more, similar to the spherical surface without grooves, and decreases monotonically from near the tip of the groove to the rear, reaching a minimum value at the recording/reproducing gap position. As you can see by comparing Figure 7 and Figure 3,
The air bearing clearance in the area in front of the air bearing surface has increased, and the submicron minute gap area is limited to the area behind the air bearing surface. Also, since a long narrow gap region is formed on the air bearing surface,
High floating pressure is generated behind the central land portion 3. Therefore, it is possible to increase the pushing amount of the head into the tape, and the stiffness of the air film near the recording/reproducing gap 2 is also increased, so that the floating gap at the recording/reproducing gap 2 position is not affected by fluctuations in the head scanning conditions. A floating head can be realized. As the length of the partial groove 4a from the rear end is increased, the floating clearance distribution in FIG. 7 gradually approaches that in FIG. 3. At the same time, the pressure generated on the air bearing surface also decreases, so that the gap in the recording/reproducing gap becomes less than 0.1 μm. On the other hand, when the length of the groove 4a is shortened, the interval between the equal gap lines 11 in FIG. 7 becomes smaller, and the gap at the rear end of the central land portion 3 rapidly decreases. This means that the tape in the recording/reproducing gap section 2 is undergoing rapid deformation, and the possibility that the tape will come into contact with the air bearing surface of the winding core 7 increases. Therefore, the length of the partial groove 4a is 1 to 3,51L as described above.
A value of about m is appropriate. Another advantage of the floating head of the present invention is that the distance from the apex 9 of the air bearing surface to the position of the recording/reproducing gap 2 is 1.5 to 2.5 mm compared to the conventional head shown in FIG.
It is possible to grow it to the size of a small fish. This is because as the tape in front of the floating surface is lifted, the minimum clearance position moves backwards, which significantly reduces the probability of damaging the recording/playback gap area when setting or adjusting the floating head. I can do it. Still another advantage of the present invention is that the size of the minimum clearance can be adjusted by appropriately selecting the length and width of the partial groove 4a and the width of the central land portion 3.
It is possible to set the desired value in the range of 0.05 to 0.5 μm.
一般に部分溝4aの長さを小さく、溝輻を小さく、中央
ランド部3の幅を大きくすれば、頂点9から記録再生ギ
ヤツプ2の距離を大きくでき、同時に最小すきまの値も
増大する。ただし溝幅と中央ランド幅とは独立に変化さ
せ得ず、記録再生ギャツプ近傍のランド幅方向の浮上す
きまを均一にするため中央ランド幅を大きくするに従い
溝幅を小さくする必要がある。幅走査回転ヘツド機構に
おいて、ヘツド走査半径35mm、ヘツド曲率半径20
m7!Lの場合の実験によれば、記録再生ギャツプ部の
最小すきまを0.15〜0.2μmにするには、ヘツド
走査速度44m/sのときは、中央ランド幅300μm
1部分溝の長さ2.5mm、幅80ttm程度、また浮
上面頂点から記録再生ギヤツプとの距離は1.7鼎程度
が適当であつた。Generally, by decreasing the length of the partial grooves 4a, decreasing the groove radius, and increasing the width of the central land portion 3, the distance from the apex 9 to the recording/reproducing gap 2 can be increased, and at the same time, the value of the minimum gap can also be increased. However, the groove width and the center land width cannot be changed independently, and in order to make the flying clearance in the land width direction near the recording/reproducing gap uniform, it is necessary to reduce the groove width as the center land width increases. In the width scanning rotating head mechanism, the head scanning radius is 35 mm and the head curvature radius is 20 mm.
m7! According to experiments in the case of L, in order to make the minimum clearance of the recording/reproducing gap part 0.15 to 0.2 μm, the central land width should be 300 μm when the head scanning speed is 44 m/s.
Appropriately, the length of the one-part groove was 2.5 mm, the width was about 80 ttm, and the distance from the top of the air bearing surface to the recording/reproducing gap was about 1.7 mm.
一方ヘツド走査速度55m/sのときは、中央ランド幅
300μm、部分溝の長さ3闘、幅100μm程度、ま
た浮上面頂点と記録再生ギャツプとの距離は2m禮度が
適当であつた。上述したように、本発明においては、そ
の浮上特性が主として部分溝4aによつて決定され、浮
上すきまがヘツド走査条件の変動の影響をうけない。On the other hand, when the head scanning speed was 55 m/s, the appropriate width of the central land was 300 .mu.m, the length of the partial groove was 3 mm, the width was about 100 .mu.m, and the distance between the top of the air bearing surface and the recording/reproducing gap was 2 m. As described above, in the present invention, the flying characteristics are mainly determined by the partial grooves 4a, and the flying clearance is not affected by variations in head scanning conditions.
そして、本発明においては、記録再生ギヤツプ2のトラ
ツク幅を形成するために傾斜溝10を設けている。この
ように部分溝4aを設けたことに加えて傾斜溝10を設
けたことは、浮上特性に影響を与えないで任意のトラツ
ク幅を設定することができる利点がある。以上説明した
ように本発明の浮上形ヘツドは、ヘツド浮上面に高いテ
ープ浮上圧力を生じさせ、浮上面の可撓性記録媒体に対
す.るヘツドの相対的進行方向における後端が所望の最
小すきまで、同進行方向における前方に向つて緩慢に増
大するくさび状の浮上すきまを形成することができ、且
つ当該浮上面のヘツド進行方向における後端の最小すき
ま位置に狭いトラツク幅の記録再生ギヤツプを容易且つ
高精度に形成可能にしたものであるから、微小すきま、
狭トラツク幅の高密度記録用浮上形ヘツドとして用いる
ことができる。In the present invention, an inclined groove 10 is provided to form the track width of the recording/reproducing gap 2. Providing the inclined grooves 10 in addition to the partial grooves 4a has the advantage that an arbitrary track width can be set without affecting the flying characteristics. As explained above, the floating head of the present invention generates a high tape floating pressure on the air bearing surface of the head, and causes the floating surface to exert pressure on the flexible recording medium. It is possible to form a wedge-shaped flying clearance that slowly increases forward in the direction of movement until the rear end of the head in the direction of relative movement of the head reaches a desired minimum clearance, and Since it is possible to easily and accurately form a recording/reproducing gap with a narrow track width at the minimum clearance position at the rear end, it is possible to easily and accurately form a recording/reproducing gap with a narrow track width.
It can be used as a floating head for high-density recording with a narrow track width.
また、可撓性記録媒体との対向面のヘツド進行方向にお
ける後端部に、記録再生ギャツプが形成されている部分
の両側において所望のトラツク幅だけ離間し、且つ対向
面のヘツド進行方向における後方に向つて深くなるよう
に傾斜した2本の傾斜溝を形成したから、浮上特性に影
響を与えないで任意のトラツク幅を設定することができ
る。なお、本発明の浮上形ヘツドは、幅方向および斜方
向の回転走査ヘツドとしてばかりでなく、可撓磁気デイ
スク用浮上形ヘツドとして利用しても同様な効果を得る
ことができる。Further, at the rear end in the head traveling direction of the surface facing the flexible recording medium, a desired track width is provided on both sides of the portion where the recording/reproducing gap is formed, and at the rear end of the facing surface in the head traveling direction. Since the two inclined grooves are formed so as to become deeper toward the surface, an arbitrary track width can be set without affecting the flying characteristics. The floating head of the present invention can be used not only as a rotational scanning head in the width direction and diagonal direction, but also as a floating head for a flexible magnetic disk to obtain similar effects.
第1図は従来の溝付球面ヘツドの外観図、第2図は従来
の他の種類の溝付球面ヘツドの外観図、第3図は第2図
のヘツド浮上面におけるテープ浮上すきまの等すきま線
分布、第4図は本発明の浮上形ヘツドの外観図、第5図
は第4図の記録再生ギヤツプ部の拡大上面図、第6図は
その拡大断面図、第7図は本発明の浮上形ヘツドの浮上
すきまの等すきま線分布である。
1・・・・・・ヘッドブロック、2・・・・・・記録再
生ギャツプ、3・・・・・・中央ランド部、4・・・・
・・溝、4a・・・・・・部分溝、6・・・・・・サイ
ドランド部、7・・・・・・巻線コア、8・・・−・・
巻線、9・・・・・・浮上面頂点、10・・・・・・傾
斜溝、11・・・・・・等すきま線。Figure 1 is an external view of a conventional grooved spherical head, Figure 2 is an external view of another type of conventional grooved spherical head, and Figure 3 is the same clearance as the tape flying clearance on the flying surface of the head shown in Figure 2. 4 is an external view of the floating head of the present invention, FIG. 5 is an enlarged top view of the recording/reproducing gap portion of FIG. 4, FIG. 6 is an enlarged sectional view thereof, and FIG. This is the equal gap line distribution of the floating clearance of the floating head. 1...Head block, 2...Record/playback gap, 3...Central land portion, 4...
... Groove, 4a ... Partial groove, 6 ... Side land part, 7 ... Winding core, 8 ... - ...
Winding wire, 9...Apex of air bearing surface, 10...Incline groove, 11...Equal clearance line.
Claims (1)
なす媒体浮上形ヘッドにおいて、前記対向面の可撓性記
録媒体に対するヘッドの相対的進行方向における後端部
に記録再生ギャップを形成し、かつこの対向面の可撓性
記録媒体に対するヘッドの相対的進行方向における後縁
から同進行方向にそつて前方に伸び、その先端が対向面
内で閉じた2本の溝を部分的に形成し、前記対向面の可
撓性記録媒体に対するヘッドの相対的進行方向における
後端部に、前記記録再生ギャップが形成されている部分
の両側において所望のトラック幅だけ離間し、且つ対向
面の可撓性記録媒体に対するヘッドの相対的進行方向に
おける後方に向つて深くなるように傾斜した2本の傾斜
溝を形成したことを特徴とする浮上形ヘッド。1. In a floating medium head in which the surface facing a flexible recording medium is a spherical or pseudo-spherical surface, a recording/reproducing gap is formed at the rear end of the facing surface in the direction of movement of the head relative to the flexible recording medium. , and partially form two grooves extending forward in the direction of movement of the head relative to the flexible recording medium on the opposing surface and whose tips are closed within the opposing surface. and a desired track width on both sides of the portion where the recording/reproducing gap is formed at the rear end portion of the opposing surface in the direction of relative movement of the head with respect to the flexible recording medium; 1. A floating head comprising two inclined grooves which are inclined to become deeper toward the rear in the direction of movement of the head relative to a flexible recording medium.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP758080A JPS5927986B2 (en) | 1980-01-25 | 1980-01-25 | floating head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP758080A JPS5927986B2 (en) | 1980-01-25 | 1980-01-25 | floating head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56105359A JPS56105359A (en) | 1981-08-21 |
JPS5927986B2 true JPS5927986B2 (en) | 1984-07-10 |
Family
ID=11669745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP758080A Expired JPS5927986B2 (en) | 1980-01-25 | 1980-01-25 | floating head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5927986B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6167091U (en) * | 1984-10-05 | 1986-05-08 | ||
JPS63189893U (en) * | 1987-05-28 | 1988-12-06 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475135A (en) * | 1981-10-07 | 1984-10-02 | International Business Machines | Magnetic head air bearing slider |
US4823216A (en) * | 1987-10-23 | 1989-04-18 | Applied Magnetics Corporation | Microminimonolithic magnetic head slider |
US4972279A (en) * | 1981-10-23 | 1990-11-20 | Applied Magnetics Corporation | Microminimonolithic magnetic head slider |
JPS58170059U (en) * | 1982-05-07 | 1983-11-12 | 株式会社日立製作所 | floating magnetic head |
ATE64026T1 (en) * | 1985-08-22 | 1991-06-15 | Minnesota Mining & Mfg | RECORDING HEAD AND SUPPORT ARM FOR A STORAGE MEDIUM WITH STRETCHED SURFACE. |
US5124865A (en) * | 1988-03-31 | 1992-06-23 | Applied Magnetics Corporation | Microminimonolithic magnetic head slider having vertically extending slots to reduce flux leakage losses |
US5081553A (en) * | 1988-03-31 | 1992-01-14 | Applied Magnetics Corporation | Combination of elongated load arm and microminimonolithic head slider |
JPH0474371A (en) * | 1990-07-17 | 1992-03-09 | Alps Electric Co Ltd | Floating type magnetic head |
JP2772728B2 (en) * | 1990-07-20 | 1998-07-09 | 富士写真フイルム株式会社 | Magnetic head |
-
1980
- 1980-01-25 JP JP758080A patent/JPS5927986B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6167091U (en) * | 1984-10-05 | 1986-05-08 | ||
JPS63189893U (en) * | 1987-05-28 | 1988-12-06 |
Also Published As
Publication number | Publication date |
---|---|
JPS56105359A (en) | 1981-08-21 |
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