JPH0624047B2 - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH0624047B2 JPH0624047B2 JP21024387A JP21024387A JPH0624047B2 JP H0624047 B2 JPH0624047 B2 JP H0624047B2 JP 21024387 A JP21024387 A JP 21024387A JP 21024387 A JP21024387 A JP 21024387A JP H0624047 B2 JPH0624047 B2 JP H0624047B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic flux
- flux density
- 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.)
- Expired - Fee Related
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
- G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
- G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
-
- 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
- G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はリード／ライトギャップを１つ持ち記録時にト
ラック幅を広く、再生時にはトラック幅を狭く使用する
ことを可能とした構造を持つ、ワイド・レコード／ナロ
ー・リード(Wide−Record／Narrow−Read)型磁気ヘッド
の新しい構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a wide read / write gap and a wide track width for recording and a narrow track width for reproduction. The present invention relates to a new structure of a record / narrow read type magnetic head.
磁気記録装置は、機器、媒体の交換などの様々な条件に
応じたオフトラックを生じる。このオフトラックにより
ヘッドは誤った信号もリードしてしまい必要とする信号
は、雑音比を確保できなくなると磁気記録装置は誤動作
を起こしてしまう。The magnetic recording device produces off-track according to various conditions such as exchange of devices and media. Due to this off-track, the head also reads an erroneous signal, and if the noise ratio cannot be secured for the necessary signal, the magnetic recording device malfunctions.
これに対するヘッド構造による対策としては、予想され
るオフトラックに対しても充分に信号、雑音比を確保で
きるように、データライトと同時にトラックの左右をあ
る幅、無信号状態とするようなサイドイレースヘッド
や、第１図に示すようなワイド・レコード／ナロー・リ
ード型磁気ヘッドなどが考案採用されている。As a countermeasure with the head structure, side erase that keeps a certain width on the left and right of the track at the same time as the data write so as to ensure a sufficient signal / noise ratio even for expected off-track A head and a wide record / narrow read type magnetic head as shown in FIG. 1 have been devised and adopted.
サイドイレースヘッド付磁気ヘッドは、構造的にリード
／ライトヘッドの両側にイレースヘッドを配置したもの
となり複雑で安価にできない。また高トラック密度にな
るにしたがい厳しい加工精度を要求される。The magnetic head with a side erase head is structurally one in which the erase heads are arranged on both sides of the read / write head, and is complicated and cannot be made inexpensive. Further, as the track density becomes higher, strict processing accuracy is required.
一方ワイド・レコード／ナロー・リード型磁気ヘッド
は、構造的には安価にできるが、リード時に少なからず
ワイドトラック側のコアが磁気回路上かかわってくるた
め完全なワイド・レコード／ナロー・リードを実現出来
ていない。On the other hand, the wide record / narrow read type magnetic head can be structurally inexpensive, but the core on the wide track side is involved in the magnetic circuit at least during reading, so a complete wide record / narrow read is realized. Not done.
本発明はこのような事情に鑑みてなされたもので、より
完全に近いワイド・レコード／ナロー・リード型磁気ヘ
ッドを簡単な構造により提供することを目的とするもの
である。The present invention has been made in view of such circumstances, and an object thereof is to provide a more complete wide record / narrow read type magnetic head with a simple structure.
本発明は上記の問題点を解決するためになされたもの
で、一つのギャップを持つ磁気ヘッドにおいて、ギャッ
プ部に充填する材質をリード時に必要なトラック幅の間
には、従来一般にギャップ材として使用されている非磁
性材を、それ以外の部分にはライト動作時だけ飽和し、
媒体より受ける磁界に対しては飽和しない低飽和磁束密
度材を使用する構造としたものである。The present invention has been made in order to solve the above problems, and in a magnetic head having one gap, a material for filling the gap portion has been conventionally used as a gap material between track widths required for reading. The non-magnetic material is saturated in the other parts only when writing,
The structure uses a low saturation magnetic flux density material that is not saturated with respect to the magnetic field received from the medium.
本発明による磁気ヘッドは、ライト動作時は与えられた
起磁力によって、容易に低飽和磁束密度材が飽和し磁気
的ギャップを形成するため、ライト時トラック幅は、こ
れに非磁性材部加えた広いトラック幅となる。In the magnetic head according to the present invention, the low saturation magnetic flux density material is easily saturated by the applied magnetomotive force during the write operation to form a magnetic gap. Therefore, the write track width is added to the non-magnetic material portion. Wide track width.
そしてリード時は、媒体から発生する磁束に対して低飽
和磁束密度材は飽和せず磁気的ギャップを形成しないた
め、リード時に有効な幅は非磁性材からなる狭い幅だけ
となる。At the time of reading, the low saturation magnetic flux density material is not saturated with respect to the magnetic flux generated from the medium and does not form a magnetic gap. Therefore, the effective width at the time of reading is only a narrow width made of the non-magnetic material.
以上の動作原理から、この構造は完全なワイド・レコー
ド／ナロー・リード型磁気ヘッドを実現することとな
る。From the above operation principle, this structure realizes a complete wide record / narrow read type magnetic head.
第２図は本発明の実施例の斜視図、第３図はその平面図
を示すもので、ヘッドコア本体１，２，３を飽和磁束密
度の高いフェライトで構成し、リード／ライトを行うギ
ャップ５にリード幅に相当する部分にガラス材６充填
し、残りの部分を媒体からの発生磁束に対して飽和しな
い程度の低飽和磁束密度フェライト７，７′で構成した
ものである。FIG. 2 is a perspective view of an embodiment of the present invention, and FIG. 3 is a plan view thereof. The head core bodies 1, 2, 3 are made of ferrite having a high saturation magnetic flux density, and a gap 5 for reading / writing is formed. The glass material 6 is filled in the portion corresponding to the lead width, and the remaining portion is made of low saturation magnetic flux density ferrite 7, 7'that is not saturated with respect to the magnetic flux generated from the medium.
以上のように構成されるので、本発明にかかる磁気ヘッ
ドは、ライト時には、リード／ライトコイル４より与え
る起磁力により低飽和磁束密度フェライト７，７′は容
易に飽和しライト時有効ギャップの一部となる。したが
ってライトされるデータの幅は低飽和磁束密度フェライ
ト７，７′とガラス材６からなる広い幅（全幅）とな
る。With the above-described structure, the magnetic head according to the present invention easily saturates the low saturation magnetic flux density ferrites 7 and 7'due to the magnetomotive force applied from the read / write coil 4 at the time of writing, thereby reducing the effective gap at the time of writing. It becomes a part. Therefore, the width of the written data is a wide width (full width) composed of the low saturation magnetic flux density ferrites 7 and 7'and the glass material 6.
一方、リード時は、低飽和磁束密度フェライト７，７′
は媒体からの磁束に対して飽和することなくヘッドコア
の一部として働くため、磁気的ギャップとして働くガラ
ス材６の下にある信号だけがリード／ライトコイルから
得ることが出来る。On the other hand, when reading, low saturation magnetic flux density ferrite 7,7 '
Acts as a part of the head core without being saturated with the magnetic flux from the medium, so that only the signal under the glass material 6 acting as a magnetic gap can be obtained from the read / write coil.
以上の説明よりわかるように、本実施例構造ヘッドはガ
ラス材６と低飽和磁束密度フェライト７，７′を加えた
幅がライト時有効な幅で、リード時はガラス材６の幅を
有効とする、ワイド・レコード／ナロー・リード型磁気
ヘッドを実現したものである。As can be seen from the above description, in the structure head of this embodiment, the width obtained by adding the glass material 6 and the low saturation magnetic flux density ferrites 7 and 7'is effective during writing, and the width of the glass material 6 is effective during reading. This is the realization of a wide record / narrow read type magnetic head.
以上述べたように、本発明によれば、簡単な構造により
理想的なワイド・レコード／ナロー・リード型磁気ヘッ
ドを実現できるため、磁気記録装置における高トラック
密度化を、機構造部に負担をかけることなく安価に実現
できるという大きな効果がある。As described above, according to the present invention, it is possible to realize an ideal wide record / narrow read type magnetic head with a simple structure. There is a great effect that it can be realized at low cost without making a call.
第１図は従来構造の磁気ヘッドの斜視図、第２図は本発
明の実施例の斜視図、第３図はその平面図である。 １……ヘッドＬコア（高飽和磁束密度フェライト） ２……ヘッドＩコア（高飽和磁束密度フェライト） ３……ヘッドバックバー（高飽和磁束密度フェライト） ４……リード／ライトコイル ５……リード／ライトギャップ ６……非磁性材（ガラス） ７，７′……低飽和磁束密度フェライトFIG. 1 is a perspective view of a conventional magnetic head, FIG. 2 is a perspective view of an embodiment of the present invention, and FIG. 3 is a plan view thereof. 1 …… Head L core (high saturation magnetic flux density ferrite) 2 …… Head I core (high saturation magnetic flux density ferrite) 3 …… Head back bar (high saturation magnetic flux density ferrite) 4 …… Read / write coil 5 …… Read / Light gap 6 …… Non-magnetic material (glass) 7,7 ′ …… Low saturation magnetic flux density ferrite
Claims (2)
磁性材を設け、それ以外の部分を使用媒体の発生磁束に
対して飽和しない程度の低飽和磁束密度材で構成し、リ
ードを非磁性材だけからなる幅で、ライトを、非磁性材
と低飽和磁束密度材からなる幅で行うことを特徴とする
磁気ヘッド。1. A non-magnetic material is provided in a width portion necessary for reading the gap portion, and the other portion is made of a low saturation magnetic flux density material that is not saturated with respect to the magnetic flux generated by the medium used, and the lead is made non-magnetic. A magnetic head characterized by performing writing with a width made of only a magnetic material and a width made of a non-magnetic material and a low saturation magnetic flux density material.
ライトで、低飽和磁束密度材を低飽和磁束密度フェライ
トで構成し、非磁性材にガラスを用いたことを特徴とす
る特許請求の範囲第１項記載の磁気ヘッド。2. The magnetic head body core is made of high saturation magnetic flux density ferrite, the low saturation magnetic flux density material is made of low saturation magnetic flux density ferrite, and glass is used as the non-magnetic material. The magnetic head according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21024387A JPH0624047B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21024387A JPH0624047B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6455710A JPS6455710A (en) | 1989-03-02 |
| JPH0624047B2 true JPH0624047B2 (en) | 1994-03-30 |
Family
ID=16586155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21024387A Expired - Fee Related JPH0624047B2 (en) | 1987-08-26 | 1987-08-26 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624047B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0685456U (en) * | 1993-05-25 | 1994-12-06 | 新キャタピラー三菱株式会社 | Fixing mechanism in rotary operation lever device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2723242B1 (en) * | 1994-07-26 | 1996-08-30 | Thomson Csf | MAGNETIC HEAD WITH SATURABLE ELEMENT AND MATRIX DEVICE COMPRISING A SET OF MAGNETIC HEADS |
-
1987
- 1987-08-26 JP JP21024387A patent/JPH0624047B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0685456U (en) * | 1993-05-25 | 1994-12-06 | 新キャタピラー三菱株式会社 | Fixing mechanism in rotary operation lever device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6455710A (en) | 1989-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |