JPH0152805B2 - - Google Patents
Info
- Publication number
- JPH0152805B2 JPH0152805B2 JP55166886A JP16688680A JPH0152805B2 JP H0152805 B2 JPH0152805 B2 JP H0152805B2 JP 55166886 A JP55166886 A JP 55166886A JP 16688680 A JP16688680 A JP 16688680A JP H0152805 B2 JPH0152805 B2 JP H0152805B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- auxiliary
- reproducing
- magnetic pole
- 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.)
- 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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
本発明は主磁極と補助磁極を有する垂直磁気記
録再生ヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a perpendicular magnetic recording/reproducing head having a main magnetic pole and an auxiliary magnetic pole.
従来、垂直磁気記録再生ヘツドは第１図に示す
如く、１主磁極と２補助磁極を有し３記録コイル
に電流を流すことにより、磁界を発生させ４垂直
磁化記録媒体を磁化し磁気記録を行う。再生時に
は１主磁極が接している４垂直磁化記録媒体の磁
化された部分から作られる磁界から５再生コイル
内を通過する。４垂直磁化記録媒体が移動するこ
とにより記録された情報が磁界の変化として現れ
５再生コイルで電流変化として再生される。 Conventionally, a perpendicular magnetic recording/reproducing head has one main magnetic pole and two auxiliary magnetic poles, as shown in Figure 1, and generates a magnetic field by passing current through three recording coils to magnetize four perpendicularly magnetized recording media and perform magnetic recording. conduct. During reproduction, a magnetic field generated from the magnetized portion of the four perpendicularly magnetized recording media that one main magnetic pole is in contact with passes through the five reproducing coils. 4. Information recorded by the movement of the perpendicularly magnetized recording medium appears as a change in the magnetic field, and is reproduced as a change in current by the reproducing coil 5.
第２図に示す如く、７再生コイルは６補助磁極
に巻かれてあり、８垂直磁化記録媒体に記録され
た磁化の作る磁界H1は外部磁界H2の作る磁界に
対して小さなループを形成する。記録された情報
を再生するのに必要な磁界H1の他に雑音として
外部磁界H2の変化が７再生コイルから電流とし
て再生ささる。垂直磁気記録再生ヘツドはリング
形ヘツドに比べて非常に感度が低下するため、外
部磁界H2の変化を取り除かなければ記録された
磁化情報を再生できない。 As shown in Figure 2, the 7 reproducing coils are wound around 6 auxiliary magnetic poles, and the magnetic field H1 created by the magnetization recorded on the 8 perpendicular magnetization recording medium forms a small loop with respect to the magnetic field created by the external magnetic field H2 . do. In addition to the magnetic field H1 required to reproduce recorded information, changes in the external magnetic field H2 are reproduced as noise from the seven reproducing coils as current. Since the sensitivity of a perpendicular magnetic recording/reproducing head is much lower than that of a ring type head, recorded magnetization information cannot be reproduced unless changes in the external magnetic field H2 are removed.
本発明はかかる欠点を除去するためになされた
ものである。 The present invention has been made to eliminate such drawbacks.
本発明の垂直磁気記録再生ヘツドは、
垂直磁化記録媒体をはさんで主磁極と補助磁極
とを相対向させて記録再生をする垂直磁気記録再
生ヘツドにおいて
前記垂直磁気記録再生ヘツドに用いる前記補助
磁極は、補助磁極の芯と、コイルとからなり、
前記補助磁極の芯は、中央付近に突起を有して
なり、
前記コイルは、前記突起をはさんで前記垂直磁
化記録媒体側の前記補助磁極の芯に巻きつけられ
た再生コイルと、前記突起をはさんで前記再生コ
イルの反対側に巻きつけられた補助コイルとから
なることを特徴とする。 The perpendicular magnetic recording and reproducing head of the present invention is a perpendicular magnetic recording and reproducing head that performs recording and reproducing by opposing a main magnetic pole and an auxiliary magnetic pole across a perpendicular magnetic recording medium, the auxiliary magnetic pole used in the perpendicular magnetic recording and reproducing head. consists of a core of an auxiliary magnetic pole and a coil, the core of the auxiliary magnetic pole has a protrusion near the center, and the coil is connected to the auxiliary magnetic pole on the side of the perpendicular magnetization recording medium across the protrusion. The reproducing coil is wound around the core of the reproducing coil, and the auxiliary coil is wound on the opposite side of the reproducing coil across the protrusion.
本発明の一実施例を第３図について説明する
と、１２は補助磁極であり、補助磁極の芯１２に
１２ａの突起を十字型にパーマロイで作り９の再
生コイルを巻き、逆巻きに１０の補助コイルを同
数回膜。１１の垂直磁化記録媒体に記録された磁
化の作る磁界H3は、小さなループを作り、突起
によつて再生磁界は、この突起に集中し、９再生
コイルを効率的に通過する。また、外部磁界H4
の変化によつて発生する電流は９再生コイルで発
生する電流と１０補助コイルで発生する電流は絶
対値は等しく方向は逆向きになる。これにより外
部磁界H4の変化による雑音は１０補助コイルで
消去することができる。 One embodiment of the present invention will be described with reference to FIG. 3. Reference numeral 12 is an auxiliary magnetic pole, a protrusion 12a is made of permalloy in a cross shape on the core 12 of the auxiliary magnetic pole, a reproducing coil 9 is wound thereon, and an auxiliary coil 10 is wound in the opposite direction. the same number of times. The magnetic field H 3 generated by the magnetization recorded on the perpendicular magnetization recording medium No. 11 forms a small loop, and the reproducing magnetic field is concentrated on this protrusion and efficiently passes through the reproducing coil No. 9. Also, the external magnetic field H 4
The current generated by the change in the current generated by the reproducing coil 9 and the current generated by the auxiliary coil 10 have the same absolute value and opposite directions. As a result, noise caused by changes in the external magnetic field H4 can be eliminated by the 10 auxiliary coils.
以上の説明において補助コイルを再生コイルと
逆巻きに同数巻くことを説明したが第４図に示す
如く、１６の補助磁極の芯に同じ方向に同数巻
き、１３補助コイルと１５再生コイルとの接続部
から１４コモンを取り出し差動増幅器で電気的に
外部磁界の変化を消去してもよい。 In the above explanation, it was explained that the auxiliary coil is wound the same number of times as the reproducing coil in the opposite direction, but as shown in Fig. 4, the same number of turns are wound in the same direction around the core of the 16 auxiliary magnetic poles, and the connection part between the 13th auxiliary coil and the 15th reproducing coil is It is also possible to take out the 14 commons and use a differential amplifier to electrically erase changes in the external magnetic field.
又、補助磁極に再生コイルと補助コイルを設け
ることを説明したが、主磁極に再生コイルと補助
コイルを設けてもよい。 Further, although it has been described that the reproducing coil and the auxiliary coil are provided on the auxiliary magnetic pole, the reproducing coil and the auxiliary coil may be provided on the main magnetic pole.
以上の如く、本発明によれば補助磁極の芯に突
起を設け、突起をはさんで再生コイルと補助コイ
ルとを設けることにより、垂直磁化記録媒体から
の磁界を突起の部分でより集中して補足すること
ができるとともに、再生コイルと補助コイルとを
設けることにより外部磁界をさえぎる効果も有す
るので、磁気シールドなどで外部磁界を遮断する
ことなく垂直磁化記録媒体に記録再生に記録され
た微少な再生信号を取り出すことができる。 As described above, according to the present invention, by providing a protrusion on the core of the auxiliary magnetic pole and providing the reproducing coil and the auxiliary coil across the protrusion, the magnetic field from the perpendicularly magnetized recording medium is more concentrated at the protrusion. In addition, by providing a reproducing coil and an auxiliary coil, it also has the effect of blocking external magnetic fields, so minute amounts recorded on a perpendicularly magnetized recording medium can be recorded and reproduced without blocking external magnetic fields with magnetic shields. The reproduced signal can be extracted.
第１図は従来の垂直磁化記録再生ヘツドを説明
するための要部図。第２図は従来の再生用補助磁
極の断面図。第３図は本発明の一実施例の再生用
補助磁極の断面図。第４図は他の実施例を示す断
面図。
１……主磁極、２，６，１２，１５……補助磁
極、１２ａ……突起、３……記録コイル、４，
８，１１……垂直磁化記録媒体、５，７，９，１
５……再生コイル、１０，１３……補助コイル、
１４……コモン線、H1，H3……垂直磁化記録媒
体からの磁界、H2，H4……外部磁界。
FIG. 1 is a diagram illustrating the main parts of a conventional perpendicular magnetization recording/reproducing head. FIG. 2 is a sectional view of a conventional reproduction auxiliary magnetic pole. FIG. 3 is a sectional view of an auxiliary magnetic pole for reproduction according to an embodiment of the present invention. FIG. 4 is a sectional view showing another embodiment. 1... Main magnetic pole, 2, 6, 12, 15... Auxiliary magnetic pole, 12a... Protrusion, 3... Recording coil, 4,
8, 11... Perpendicular magnetization recording medium, 5, 7, 9, 1
5... Regeneration coil, 10, 13... Auxiliary coil,
14...Common wire, H1 , H3 ...Magnetic field from the perpendicular magnetization recording medium, H2 , H4 ...External magnetic field.
Claims (1)
極とを相対向させて記録再生をする垂直磁気記録
再生ヘツドにおいて、 前記垂直磁気記録再生ヘツドに用いる前記補助
磁極は、補助磁極の芯と、コイルとからなり、 前記補助磁極の芯は、中央付近に突起を有して
なり、 前記コイルは、前記突起をはさんで前記垂直磁
化記録媒体側の前記補助磁極の芯に巻きつけられ
た再生コイルと、前記突起をはさんで前記再生コ
イルの反対側に巻きつけられた補助コイルとから
なることを特徴とする垂直磁気記録再生ヘツド。[Scope of Claims] 1. In a perpendicular magnetic recording and reproducing head that performs recording and reproducing by making a main magnetic pole and an auxiliary magnetic pole face each other across a perpendicular magnetic recording medium, the auxiliary magnetic pole used in the perpendicular magnetic recording and reproducing head comprises: It consists of a core of an auxiliary magnetic pole and a coil, the core of the auxiliary magnetic pole has a protrusion near the center, and the coil has a core of the auxiliary magnetic pole on the side of the perpendicular magnetization recording medium across the protrusion. 1. A perpendicular magnetic recording/reproducing head comprising: a reproducing coil wound around the magnetic head; and an auxiliary coil wound on the opposite side of the reproducing coil across the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16688680A JPS5792416A (en) | 1980-11-27 | 1980-11-27 | Vertical magnetic recording and reproducing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16688680A JPS5792416A (en) | 1980-11-27 | 1980-11-27 | Vertical magnetic recording and reproducing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5792416A JPS5792416A (en) | 1982-06-09 |
| JPH0152805B2 true JPH0152805B2 (en) | 1989-11-10 |
Family
ID=15839436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16688680A Granted JPS5792416A (en) | 1980-11-27 | 1980-11-27 | Vertical magnetic recording and reproducing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5792416A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687215A (en) * | 1979-12-14 | 1981-07-15 | Toshiba Corp | Vertical magnetization type magnetic recording and reproducing device |
-
1980
- 1980-11-27 JP JP16688680A patent/JPS5792416A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5792416A (en) | 1982-06-09 |
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