JPH01296474A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH01296474A JPH01296474A JP12572288A JP12572288A JPH01296474A JP H01296474 A JPH01296474 A JP H01296474A JP 12572288 A JP12572288 A JP 12572288A JP 12572288 A JP12572288 A JP 12572288A JP H01296474 A JPH01296474 A JP H01296474A
- Authority
- JP
- Japan
- Prior art keywords
- head
- magnetic
- floating
- magnetic head
- width
- 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.)
- Granted
Links
- 238000007667 floating Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000005094 computer simulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- 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、光磁気ディスク装置の磁界変調用磁気ヘッド
に係り、特に高浮上に好適な形状の磁気ヘッドに関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head for magnetic field modulation of a magneto-optical disk device, and particularly to a magnetic head having a shape suitable for high flying.
従来の浮動型磁気ヘッドは、特公昭５７−５６９に記載
のように、２つのレール表面に空気ベアリングを形成す
ることにより浮動する形がとられていた。ディスク表面
からの浮上量は、レールの幅を変化させることにより変
えることができる。磁気ディスク装置用には、高記録密
度化のためにその浮上量を小さくする必要があり、レー
ル幅を狭くすることによりその要求を達成させていた。A conventional floating type magnetic head is made to float by forming air bearings on the surfaces of two rails, as described in Japanese Patent Publication No. 57-569. The flying height from the disk surface can be changed by changing the width of the rail. For magnetic disk drives, it is necessary to reduce the flying height in order to increase the recording density, and this requirement has been achieved by narrowing the rail width.
−力先磁気ディスク装置の磁界変調用磁気ヘッドでは、
磁気ヘッドから発生する磁束は記録密度に関係なく、浮
上量は大きくてもよいため、耐摺動性の観点からできる
だけ大きくとることが望ましい。そのため、現在の磁気
ヘッドはレール幅を最大限大きくとった形状となってい
る。- In the magnetic head for magnetic field modulation of the destination magnetic disk device,
The magnetic flux generated from the magnetic head is not related to the recording density and the flying height may be large, so it is desirable to make it as large as possible from the viewpoint of sliding resistance. For this reason, current magnetic heads are designed to maximize the rail width.
光磁気ディスクは、その記録面の内周から外周にかけ最
大限の有効面積を使い、記録を行なっている。磁気ヘッ
ドの浮上量を大きくとるために、上記従来技術のように
ヘッドの幅そのものを大きくすると、特に最外周部分に
信号が記録できない無駄な部分が生じる等の問題のため
、ヘッドの幅は必要以上に太きくしない方が望ましい。Magneto-optical disks perform recording using the maximum effective area from the inner circumference to the outer circumference of the recording surface. In order to increase the flying height of the magnetic head, increasing the width of the head itself as in the conventional technology described above creates problems such as wasteful areas where signals cannot be recorded, especially at the outermost periphery, so the width of the head is necessary. It is preferable not to make it any thicker.
本発明の目的は、浮動磁気ヘッドの外形寸法を従来型の
形状のまま、浮動面の形状を工夫することによって高浮
上化させることにある。An object of the present invention is to increase the flying height of a floating magnetic head by devising the shape of the floating surface while keeping the external dimensions of the conventional type.
上記目的は、従来方式である二つのレールの間にある溝
の本数を２本にすることにより達成される。その際、溝
の幅と深さは高浮上に適するように選ばれる。The above object is achieved by reducing the number of grooves between two rails to two, which is the conventional method. In this case, the width and depth of the groove are selected to be suitable for high flying height.
〔作用〕
ディスクが高速回転すると、ヘラ１く前端がらヘッドと
ディスク間の微少間隙に流入した空気は、ヘッド前端付
近のテーパ部分で圧縮され、高い動圧を得る。ヘッド中
央付近では動圧は低下する。[Operation] When the disk rotates at high speed, air flowing into the small gap between the head and the disk from the front end of the spatula is compressed at the tapered portion near the front end of the head, creating a high dynamic pressure. Dynamic pressure decreases near the center of the head.
ヘッド後端付近では、２本の溝の底部分に高い動圧を発
生するため、以」二により前端１ケ所、後端２ケ所の高
圧によって、ヘッドは安定に浮動することになる。In the vicinity of the rear end of the head, high dynamic pressure is generated at the bottoms of the two grooves, so the high pressure at one location at the front end and at two locations at the rear end allows the head to float stably.
以下、本発明の一実施例を第」−図、第２図により説明
する。第１図は、本発明の一実施例を模式的に表わした
図である。ディスクの高速回転に伴い発生する高い空気
圧力により浮上する浮上面１゜２．３と、その空気と浮
」二面に導入するためのテーパ面４，５．６と、磁気変
換器９を有する磁気ヘッドにおいて、ヘッド長手方向に
平行に２本の溝７，８が形成されている。第２図は、第
１図の磁気ヘッドの前端側Ｅから見た正面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram schematically representing an embodiment of the present invention. It has an air bearing surface 1° 2.3 which floats due to the high air pressure generated as the disk rotates at high speed, tapered surfaces 4 and 5.6 for introducing the air and the floating surface into the two surfaces, and a magnetic transducer 9. In the magnetic head, two grooves 7 and 8 are formed parallel to the longitudinal direction of the head. FIG. 2 is a front view of the magnetic head shown in FIG. 1, viewed from the front end side E. FIG.
溝の幅Ｗと深さｈとは、高浮上に適するように決定され
る。浮上面と反対側の面は、押付はバネにより適当な位
置を、所定の荷重によって支持される。いま、ヘッド長
さ５．７ｍ、ヘッド幅３．７ｍ浮」二面１及び３の幅０
．５＋ｍ＋、浮上面２の輻２．１ｍ、テーパ面４，５．
６のヘッド長手方向の長さ０ 、４ ｍｍ 、テーパ面
の浮上面からの角度０．８度。The width W and depth h of the groove are determined to be suitable for high flying. The surface opposite to the floating surface is pressed at an appropriate position by a spring and supported by a predetermined load. Currently, the head length is 5.7 m, the head width is 3.7 m, and the width of two sides 1 and 3 is 0.
．． 5+m+, radius of air bearing surface 2 2.1m, tapered surface 4,5.
6, the length in the longitudinal direction of the head is 0.4 mm, and the angle of the tapered surface from the air bearing surface is 0.8 degrees.
溝７，８の幅ｗ ０ 、３ ｍｍ 、深さｈ １００μ
ｍの寸法を持つ磁気ヘッドを、押し付は荷重６ｇｗの支
持バネで、ヘッド前端から全長に対する比で０．５８の
位置を支持した場合、ヘッドの線速度２０ ｍ ／ Ｓ
で浮上面及び溝の底面に発生する空気の圧力分布は計算
機シミュレーションにより計算すると第３図に示される
ようになった。Width w 0 of grooves 7 and 8, 3 mm, depth h 100 μ
When a magnetic head with dimensions of m is pressed by a support spring with a load of 6 gw and supported at a position of 0.58 from the front end of the head to the overall length, the linear velocity of the head is 20 m/S.
The pressure distribution of the air generated on the air bearing surface and the bottom surface of the groove was calculated by computer simulation and was shown in Figure 3.
すなわち、ヘッドは浮動時にその前端の幅方向中心付近
と、後端の２ケ所の溝部分に高圧のピークが存在し、流
体力学的に支持されるため、安定に浮上することが確認
された。かつ、磁気変換器９を有するヘッド後端の浮上
量は、３．０μｍ となり、第４図に示す従来のヘッド
（長さ５ 、７ ｎｍ 。In other words, it was confirmed that when the head floats, there are high pressure peaks near the widthwise center of the front end and in two grooves at the rear end, and because the head is supported hydrodynamically, it floats stably. In addition, the flying height of the rear end of the head having the magnetic transducer 9 is 3.0 μm, which is similar to the conventional head shown in FIG. 4 (length: 5.7 nm).
ヘッド幅３．７ｍ、一つの浮上面の幅１ 、７ ｎ＋ｍ
、テーパ面のヘッド長手方向の長さ０．４ｍｍ、テー
パ面の浮上量からの角度０．８ 度、溝の幅０ 、 ：
３ ｍｍ 。Head width 3.7m, width of one air bearing surface 1,7n+m
, the length of the tapered surface in the longitudinal direction of the head is 0.4 mm, the angle of the tapered surface from the flying height is 0.8 degrees, and the width of the groove is 0.
3 mm.
深さ５００μｍ、押し付は荷重６ｇｗ）の線速度２０
ｍ ／ Ｓにおけるヘッド後端の浮上量２．６μｍに比
べて、約１５％高浮上化している。Depth 500μm, pressing load 6gw) Linear speed 20
Compared to the flying height of 2.6 μm at the rear end of the head at m/S, the flying height is approximately 15% higher.
第５図には本発明の第２の実施例の計算機シミュレーシ
ョンによる浮上特性Ｃを、前記第一実施例Ｂ、及び従来
例Ａと共に示した。本実施例は、第１の実施例と外形寸
法が同一で、２本の溝の深さをともに１００μｍとしで
ある。ヘッド後端の浮上量は、前記第１の実施例及び従
来例に比べ線速度２０ ｍ ／ Ｓで５μｍと非常に大
きい浮上量となった。FIG. 5 shows the flying characteristics C obtained by computer simulation of the second embodiment of the present invention together with the first embodiment B and the conventional example A. This embodiment has the same external dimensions as the first embodiment, and the depths of the two grooves are both 100 μm. The flying height of the rear end of the head was 5 μm at a linear velocity of 20 m/s, which was a very large flying height compared to the first embodiment and the conventional example.
本発明の他の実施例として、２本の溝の深さを前記実施
例以外の寸法に形成した。この場合には溝深さが大きい
程、溝底部で発生する圧力は低下し、かわって中央の浮
上面における圧力が高くなり、浮上安定性の低下がみら
れた。従がって安定浮上のためには、荷重点の位置等を
調節する必要がある。In another embodiment of the present invention, the two grooves were formed to have depths other than those in the above embodiment. In this case, the greater the groove depth, the lower the pressure generated at the groove bottom, and the higher the pressure at the center floating surface, which resulted in a decrease in floating stability. Therefore, for stable levitation, it is necessary to adjust the position of the load point, etc.
本発明によれば、従来型の浮動磁気ヘッドと同一の形状
で、浮］二面形状を工夫することによってヘラ１〜を高
浮上化することができる。浮上面に形成する２本の溝の
深さを１〜２００μｍの間で変化させることにより、外
形寸法を変えることなく浮」二景を数％から最大２ｏ○
％大きくすることかできた。上述の如く、本発明は光磁
気ディスク装置における磁気ヘッドの耐摺動性向上に大
きく寄与するものである。According to the present invention, it is possible to make the spatulas 1 to have a high flying height by devising the floating dihedral shape while having the same shape as a conventional floating magnetic head. By changing the depth of the two grooves formed on the air bearing surface between 1 and 200 μm, the floating height can be increased from a few percent to a maximum of 2 o○ without changing the external dimensions.
I was able to increase the percentage. As described above, the present invention greatly contributes to improving the sliding resistance of a magnetic head in a magneto-optical disk device.
第１図は本発明の一実施例の磁気ヘッドの浮上面側から
見た斜視図、第２図は上記実施例のヘッド前端から見た
正面図、第３図は上記実施例のヘッドが、線速度２０
ｍ ／ Ｓで浮動しているときの、浮動面の圧力分布図
、第４図は従来型の磁気ヘッドの浮上面側から見た斜視
図、第５図は本発明の実施例と従来例のヘッド浮上特性
を示したグラフである。
］〜３・・・浮上面、４〜６ ・テーパ面、７〜８ ・
溝、９・・・磁気変換器、］］−〜１２・・・浮上面、
１３〜１４・テーパ面、１５・・溝、１６・・磁気変換
器。FIG. 1 is a perspective view of a magnetic head according to an embodiment of the present invention as seen from the air bearing surface side, FIG. 2 is a front view of the head according to the above embodiment as seen from the front end, and FIG. Linear speed 20
Fig. 4 is a perspective view of a conventional magnetic head viewed from the air bearing surface side, and Fig. 5 is a diagram of the pressure distribution on the floating surface when floating at m/S. 3 is a graph showing head flying characteristics. ]~3...Flying surface, 4~6 ・Tapered surface, 7~8 ・
Groove, 9... Magnetic transducer, ]]-~12... Air bearing surface,
13-14 Tapered surface, 15 Groove, 16 Magnetic transducer.
Claims (1)
ヘッドであつて、高速回転するディスク上をディスク面
との微少な間隔に高圧を発生するための浮上面と、空気
流を浮上面に導入するためのテーパ部を有し、かつ後端
に磁気変換器を具備するヘッドにおいて、ヘッド長手方
向に平行な２本の溝がテーパ面から浮上面にかけて形成
されていることを特徴とする磁気ヘッド。 ２、前記溝は、その幅と深さにおいてヘッド幅に比して
浮上時に両側の浮上面下に生じる空気圧よりも十分高く
なる程度に小さいことを特徴とする請求範囲第１項に記
載の磁気ヘッド。 ３、外形寸法が、ヘッド幅４〜１０ｍｍ×ヘッド長２〜
１０ｍｍのヘッドに対し、上記溝幅が０．１〜０．７ｍ
ｍ、溝深さ１〜２００μｍで形成したことを特徴とする
請求範囲第１項、第２項に記載の磁気ヘッド。[Claims] 1. A floating magnetic head for magnetic field modulation in a magneto-optical disk device, which includes an air bearing surface for generating high pressure at a minute distance from the disk surface over a disk rotating at high speed, and an air flow. In a head that has a tapered part for introducing it into the air bearing surface and is equipped with a magnetic transducer at the rear end, two grooves parallel to the longitudinal direction of the head are formed from the tapered surface to the air bearing surface. Features a magnetic head. 2. The magnetic device according to claim 1, wherein the width and depth of the groove are small enough compared to the head width to be sufficiently higher than the air pressure generated under both air bearing surfaces during flying. head. 3. External dimensions: Head width 4-10mm x Head length 2-
For a 10mm head, the groove width is 0.1 to 0.7m.
3. The magnetic head according to claim 1, wherein the magnetic head is formed with a groove depth of 1 to 200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63125722A JP2695836B2 (en) | 1988-05-25 | 1988-05-25 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63125722A JP2695836B2 (en) | 1988-05-25 | 1988-05-25 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01296474A true JPH01296474A (en) | 1989-11-29 |
| JP2695836B2 JP2695836B2 (en) | 1998-01-14 |
Family
ID=14917146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63125722A Expired - Lifetime JP2695836B2 (en) | 1988-05-25 | 1988-05-25 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2695836B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6097576A (en) * | 1992-05-06 | 2000-08-01 | Teac Corporation | Magnetic head |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200967A (en) * | 1981-06-04 | 1982-12-09 | Mitsubishi Electric Corp | Floating head slider |
| JPS6020075U (en) * | 1983-07-15 | 1985-02-12 | 株式会社日立製作所 | floating magnetic head |
| JPS60129980A (en) * | 1983-12-16 | 1985-07-11 | Hitachi Ltd | Slider for magnetic head |
| JPS60123776U (en) * | 1984-01-31 | 1985-08-21 | 富士通株式会社 | magnetic head slider |
| JPS60150668U (en) * | 1984-03-16 | 1985-10-07 | 株式会社リコー | head slider |
| JPS61137288A (en) * | 1984-12-07 | 1986-06-24 | Tdk Corp | Magnetic head |
| JPS61170922A (en) * | 1985-01-23 | 1986-08-01 | Fujitsu Ltd | Magnetic head slider |
| JPS6215166U (en) * | 1986-06-26 | 1987-01-29 |
-
1988
- 1988-05-25 JP JP63125722A patent/JP2695836B2/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200967A (en) * | 1981-06-04 | 1982-12-09 | Mitsubishi Electric Corp | Floating head slider |
| JPS6020075U (en) * | 1983-07-15 | 1985-02-12 | 株式会社日立製作所 | floating magnetic head |
| JPS60129980A (en) * | 1983-12-16 | 1985-07-11 | Hitachi Ltd | Slider for magnetic head |
| JPS60123776U (en) * | 1984-01-31 | 1985-08-21 | 富士通株式会社 | magnetic head slider |
| JPS60150668U (en) * | 1984-03-16 | 1985-10-07 | 株式会社リコー | head slider |
| JPS61137288A (en) * | 1984-12-07 | 1986-06-24 | Tdk Corp | Magnetic head |
| JPS61170922A (en) * | 1985-01-23 | 1986-08-01 | Fujitsu Ltd | Magnetic head slider |
| JPS6215166U (en) * | 1986-06-26 | 1987-01-29 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6097576A (en) * | 1992-05-06 | 2000-08-01 | Teac Corporation | Magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2695836B2 (en) | 1998-01-14 |
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