JPH0227367Y2 - - Google Patents
Info
- Publication number
- JPH0227367Y2 JPH0227367Y2 JP12325381U JP12325381U JPH0227367Y2 JP H0227367 Y2 JPH0227367 Y2 JP H0227367Y2 JP 12325381 U JP12325381 U JP 12325381U JP 12325381 U JP12325381 U JP 12325381U JP H0227367 Y2 JPH0227367 Y2 JP H0227367Y2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic head
- ring
- signal
- working gap
- 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
- 230000005415 magnetization Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 10
- 230000035699 permeability Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【考案の詳細な説明】
本考案は垂直磁気記録再生に使用されるリング
型の磁気ヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ring-shaped magnetic head used for perpendicular magnetic recording and reproduction.
近時、磁気記録再生において高密度記録を可能
とする垂直磁気記録再生が注目され、この垂直磁
気記録用磁気ヘツドとして単磁極型磁気ヘツドが
提案されている。しかし、単磁極型磁気ヘツドで
は、その構造上、記録媒体上の信号により磁気ヘ
ツドに発生された磁束はその閉ループの大部分を
磁気ヘツド外の空間で形成することとなり、これ
により磁束密度が減少して十分な再生出力を得る
ことが困難である。そこで、実際には、再生には
使われず、再生においては従来のリング型磁気ヘ
ツドを使用しているのが現状である。ところで、
リング型磁気ヘツドにより記録媒体の信号を再生
する場合には、磁気ヘツドに発生された磁束は磁
気ヘツド内で閉ループを形成するため、十分な再
生出力を得ることができる反面、良好な再生を行
うためにはその作動空隙をきわめて狭く形成する
必要がある。 In recent years, perpendicular magnetic recording and reproduction, which enables high-density recording, has attracted attention in magnetic recording and reproduction, and a single-pole type magnetic head has been proposed as a magnetic head for this perpendicular magnetic recording. However, due to the structure of a single-pole magnetic head, most of the closed loop of the magnetic flux generated in the magnetic head by signals on the recording medium is formed in the space outside the magnetic head, which reduces the magnetic flux density. It is difficult to obtain sufficient playback output. Therefore, in reality, it is not used for reproduction, and the conventional ring-shaped magnetic head is currently used for reproduction. by the way,
When reproducing signals from a recording medium using a ring-type magnetic head, the magnetic flux generated by the magnetic head forms a closed loop within the magnetic head, so that it is possible to obtain sufficient reproduction output and to perform good reproduction. In order to achieve this, it is necessary to form the working gap extremely narrow.
一般に、この作動空隙は再生すべき信号に含ま
れる最も高い周波数の波長の略1/2の幅に形成す
る必要があるが、特に高密度に垂直記録された信
号を良好に再生すべくこの作動空隙を形成するの
は実際上非常に困難が伴うものであつた。 Generally, this working gap needs to be formed to have a width approximately half the wavelength of the highest frequency included in the signal to be reproduced, but in particular, this working gap must be formed to have a width that is approximately half the wavelength of the highest frequency included in the signal to be reproduced. Forming the voids was actually extremely difficult.
本考案はかかる従来の欠点を解決するものであ
り、以下その実施例をもつて説明する。 The present invention solves these conventional drawbacks, and will be described below with reference to its embodiments.
第１図は本考案に係るリング型磁気ヘツドの一
実施例を示し、リング型ヘツド１は例えばパーマ
ロイ、センダスト等の高透磁率磁性材から成つて
おり、コイル２が巻回されると共に、垂直方向に
磁化容易軸を有する記録媒体３にその作動空隙４
をもつて対接配置される。 FIG. 1 shows an embodiment of a ring-shaped magnetic head according to the present invention. The ring-shaped head 1 is made of a high permeability magnetic material such as permalloy or sendust, and has a coil 2 wound thereon and a perpendicular magnetic head. A recording medium 3 having an axis of easy magnetization in the direction of its working gap 4
are placed opposite each other.
作動空隙４は第１図及び第２図に示すとおり、
その記録媒体３に対して垂直且つ記録媒体３上に
形成されるトラツクの幅方向−に平行に、ま
た、この一端面に対向する他の端面４2が記録媒
体３に対して垂直且つ記録再生される信号の平均
波長の数倍あるいはそれ以上にわたつてトラツク
の幅方向−に対して非平行に形成される。 The working gap 4 is as shown in FIGS. 1 and 2,
The other end surface 42 opposite to this one end surface is perpendicular to the recording medium 3 and parallel to the width direction of the track formed on the recording medium 3, and the other end surface 42 is perpendicular to the recording medium 3 and recording/reproducing. It is formed non-parallel to the width direction of the track over several times or more the average wavelength of the signal being transmitted.
第２図は、簡単のため記録媒体３に一定周波
数、一定振幅の信号Ｓが記録されている場合の記
録媒体３と本実施例のリング型磁気ヘツド１の関
係を模式的に表わした説明図である。 FIG. 2 is an explanatory diagram schematically showing the relationship between the recording medium 3 and the ring-shaped magnetic head 1 of this embodiment when a signal S of a constant frequency and constant amplitude is recorded on the recording medium 3 for simplicity. It is.
リング型磁気ヘツド１は、その端面４2が信号
Ｓの波長の２倍にわたつて記録媒体３のトラツク
方向−に非平行に形成されている。このとき
端面４2側では信号Ｓの正極部P1，P3により正の
磁束変化と負極部P2，P4により負の磁束変化が
発生され、結果的に端面４2側ではこれらS1〜S4
による磁束変化の和が発生されることとなる。こ
こで、信号Ｓはその周波数及び振幅が一定である
ため、端面４2側で発生される信号Ｓの磁束変化
は平均化されて打消され、これによりリング型磁
気ヘツド１は平行な端面４1の側での磁束変化に
よつてのみ記録媒体３上の信号Ｓを読み取ること
となる。 The ring-shaped magnetic head 1 has an end face 42 extending twice as long as the wavelength of the signal S and is non-parallel to the track direction of the recording medium 3. At this time, on the end face 4 2 side, a positive magnetic flux change is generated by the positive pole parts P 1 and P 3 of the signal S, and a negative magnetic flux change is generated by the negative pole parts P 2 and P 4 of the signal S, and as a result, on the end face 4 2 side, these S 1 ~ S4
The sum of magnetic flux changes caused by Here, since the frequency and amplitude of the signal S are constant, changes in the magnetic flux of the signal S generated on the side of the end surface 4 2 are averaged out and canceled . The signal S on the recording medium 3 can be read only by the magnetic flux change on the side.
従つて、作動空隙４の間隔に関係なく良好な再
生が可能となり、更には端面４1の側で発生され
た磁束はリング型磁気ヘツド１内で閉ループを形
成するため十分な再生出力を得ることが可能とな
る。 Therefore, good regeneration is possible regardless of the spacing of the working air gap 4, and furthermore, since the magnetic flux generated on the end face 41 side forms a closed loop within the ring-shaped magnetic head 1, sufficient regeneration output can be obtained. becomes possible.
なお、記録媒体３に記録された信号Ｓがオーデ
イオ信号等の周波数及び振幅が一定でない信号で
ある場合には、端面４2側で発生される信号Ｓの
磁束変化が平均化されて打消されるべく、十分な
範囲にわたつて端面４2を記録媒体３のトラツク
方向−に非平行に形成すればよい。 Note that if the signal S recorded on the recording medium 3 is a signal such as an audio signal whose frequency and amplitude are not constant, changes in the magnetic flux of the signal S generated on the end face 4 2 side are averaged and canceled. Therefore, the end face 42 may be formed non-parallel to the track direction of the recording medium 3 over a sufficient range.
また、記録媒体３において、第３図に示すとお
り、垂直磁気記録層３1の下面に高透磁率磁性層
３2を形成すれば、磁気回路を閉磁路とすること
ができるため、なお一層リング型磁気ヘツド１の
再生感度を高めることができる。 Furthermore, in the recording medium 3, if a high permeability magnetic layer 32 is formed on the lower surface of the perpendicular magnetic recording layer 31 , as shown in FIG. The reproduction sensitivity of the magnetic head 1 can be increased.
第１図は本考案に係るリング型磁気ヘツドの一
実施例の斜視図、第２図及び第３図は前記実施例
の説明図をそれぞれ示す。
１……リング型磁気ヘツド、３……記録媒体、
４……作動空隙、４1，４2……端面、−……
トラツクの幅方向。
FIG. 1 is a perspective view of an embodiment of a ring-type magnetic head according to the present invention, and FIGS. 2 and 3 are explanatory views of the embodiment. 1...Ring type magnetic head, 3...Recording medium,
4... Working gap, 4 1 , 4 2 ... End face, -...
In the width direction of the truck.
Claims (1)
し、作動空隙を形成する一対の端面が該記録媒体
の走行方向に対向した状態で且つ該作動空隙をも
つて対接配置されるリング型磁気ヘツドにおい
て、 前記作動空隙を形成する前記一対の端面のう
ち、一端面を前記記録媒体に対して垂直且つ前記
記録媒体上のトラツクの幅方向に対して平行に形
成すると共に、他端面を前記記録媒体に対して垂
直且つ前記トラツクの幅方向に対して非平行にそ
れぞれ形成したことを特徴とするリング型磁気ヘ
ツド。[Claims for Utility Model Registration] For a recording medium having an axis of easy magnetization in the perpendicular direction, a pair of end surfaces forming a working gap are opposed to each other in the running direction of the recording medium and are in contact with each other across the working gap. In the ring-shaped magnetic head arranged, one end surface of the pair of end surfaces forming the working gap is formed perpendicular to the recording medium and parallel to the width direction of the track on the recording medium. . A ring-shaped magnetic head, wherein the other end surface is formed perpendicular to the recording medium and non-parallel to the width direction of the track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12325381U JPS5830926U (en) | 1981-08-20 | 1981-08-20 | ring type magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12325381U JPS5830926U (en) | 1981-08-20 | 1981-08-20 | ring type magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5830926U JPS5830926U (en) | 1983-02-28 |
| JPH0227367Y2 true JPH0227367Y2 (en) | 1990-07-24 |
Family
ID=29917158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12325381U Granted JPS5830926U (en) | 1981-08-20 | 1981-08-20 | ring type magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830926U (en) |
-
1981
- 1981-08-20 JP JP12325381U patent/JPS5830926U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5830926U (en) | 1983-02-28 |
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