JPS58196617A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS58196617A JPS58196617A JP7870482A JP7870482A JPS58196617A JP S58196617 A JPS58196617 A JP S58196617A JP 7870482 A JP7870482 A JP 7870482A JP 7870482 A JP7870482 A JP 7870482A JP S58196617 A JPS58196617 A JP S58196617A
- Authority
- JP
- Japan
- Prior art keywords
- core
- center core
- magnetic
- reinforcing
- magnetic material
- 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.)
- Pending
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
- G11B5/10—Structure or manufacture of housings or shields for heads
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はビデオ情報のような一周波信号を記録及び若し
くは再生するのに適用して好適な磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head suitable for recording and/or reproducing single frequency signals such as video information.
第１図はこの種磁気ヘッドの先行例を示すもので、セン
ダストよりなるセンタコア（１）を一対の補強コ°ｒ
（２１ｔ２＋でナンドイッチしてなるものである。Figure 1 shows a prior example of this type of magnetic head, in which a center core (1) made of sendust is connected to a pair of reinforcement cores.
(It is made by doing a Nando switch with 21t2+.
各コアｉｌ＋及び（２１＋２１はそれらの対向面の外形
が実質的に一致するように形成されており、図示省略し
た接着材層（非磁性）を介して一体化されている。The cores il+ and (21+21) are formed so that the outer shapes of their opposing surfaces substantially match, and are integrated via an adhesive layer (non-magnetic) not shown.
センタコア（１）は−組のコア半休ａｌ１３３を突き合
わせてなり、一方のコア半休（１１）に形成したコイル
窓（至）を挾んで上方にフロントギャップα委をまた下
方にバッタギャップ（２）を備えている。各補強コア＋
２１（２１はそれぞれ上部にガラス等の非磁性体（２１
）を、下部にセンダスト等の固有抵抗の大きい磁性体（
支）を備工、磁性体（ｚ２１の上面にセンタコアｆｉｌ
のコイル窓０に対向する切欠孔盤を開設してコイル（図
示省略）の捲回を１１能にせしめている。非磁性体Ｑ旧
まセンタコアｔ１＋に比べて記録媒体（テープ）に対す
る摩耗性の大きいものとして、センタコアのテープに対
するスペーシングロスの増大を防ぐようにしている。The center core (1) is made by butting together a pair of half-core cores (Al133), and has a front gap α on the upper side and a grasshopper gap (2) on the lower side, sandwiching the coil window (to) formed in one of the core half-holes (11). We are prepared. Each reinforcement core +
21 (21 is a non-magnetic material such as glass (21
), and a magnetic material with high resistivity such as sendust (
A center core fil is installed on the top surface of the magnetic material (z21).
A cutout hole is provided opposite the coil window 0 to allow the coil (not shown) to be wound in 11 ways. Since the non-magnetic material Q is more abrasive to the recording medium (tape) than the old center core t1+, it is designed to prevent an increase in the spacing loss of the center core against the tape.
この先行例はセンタコア（１）のトラック延在方向の全
長［Ｆ］の中央部１／３〜１／４程度（１ｍ位）がテー
プに当接するため単位面積当たりのテープ当接圧が小さ
く再生出力を大きくとれない。この傾向は摩耗の進行に
伴ないＭｌｌになる。センタコア（１）の形状上、ギャ
ップ深さの低下に伴ないテープ当接長が著しく大きくな
るからである。また、センタコア（１）と各補強コア（
２）（２）との間薯こ非磁性の接着材層が介在している
ため両コア間の磁気抵抗が犬舎くなり再生効率の向上を
妨げる、等の欠点が認められた。In this precedent example, the central part of the center core (1) in the track extending direction [F], about 1/3 to 1/4 (about 1 m), comes into contact with the tape, so the tape contact pressure per unit area is small for playback. The output cannot be increased. This tendency becomes Mll as wear progresses. This is because, due to the shape of the center core (1), the tape contact length becomes significantly larger as the gap depth decreases. In addition, the center core (1) and each reinforcing core (
2) Since a non-magnetic adhesive layer is interposed between the core and (2), the magnetic resistance between the two cores becomes too strong, which hinders the improvement of regeneration efficiency.
本発明はかかる欠点に鑑みなされたもので、上記従来例
に比べて再生出力の周波数特性を改善できかつ出力低下
の対時間特性を向上することのできる磁気ヘッドを提供
しようとするものである。The present invention has been made in view of these drawbacks, and it is an object of the present invention to provide a magnetic head that can improve the frequency characteristics of reproduced output and improve the time characteristics of output reduction compared to the conventional example.
次に本発明を図示実施例に従い説明する。＠２図は本発
明の１実施例の分解斜視図、第３図はその組立斜視図、
第４図及び第５図はそれぞれ中央部の縦、横各断面図で
あ□る。各図において、（３）はセンタコア、（４）（
５）は第１、第２補強コアである。Next, the present invention will be explained according to illustrated embodiments. @ Figure 2 is an exploded perspective view of one embodiment of the present invention, Figure 3 is an assembled perspective view thereof,
4 and 5 are vertical and horizontal cross-sectional views of the central portion, respectively. In each figure, (3) is the center core, (4) (
5) are first and second reinforcing cores.
センタコア（３）は合金磁性材料（例えばセンダスト）
からなるコア半体０綽Ｉ、両コア半休の対向面間に適当
な結合材（例えば銀ロウ）（ト）を介在させて一体化す
るようにしている。一方のコア半体００はコイル窓■を
備え、このコイル窓■はセンタコア（３）のフロントギ
ャップ■とパックギャップ（至）を区分ｔｉ ヨＪ）
ｚ ｔ、ている。本実施例ではこのセンタコア（３）は
その全厚（１）がトラック幅薔こ相当する約２５μｍに
選定され、またトラック延在方向のテープ当接長（Ｑｌ
が中間にフロントギャップ（至）を挾んで約６００μｓ
ｒｒ程度に選爺している。このため、このセンタコア（
３１は従来のセンタコア（１）に比べて両肩部分を除去
するようにしている。破線域ｇｔ）＠’はこの除去部分
を示すものである。Center core (3) is made of alloy magnetic material (e.g. Sendust)
A suitable bonding material (for example, silver solder) is interposed between the opposing surfaces of both core halves to integrate them. One core half 00 is equipped with a coil window ■, which separates the front gap ■ and pack gap (to) of the center core (3).
z t, it's there. In this embodiment, the total thickness (1) of the center core (3) is selected to be about 25 μm, which corresponds to the track width, and the tape contact length (Ql) in the track extending direction is selected.
Approximately 600 μs with the front gap in the middle
I have selected about rr. For this reason, this center core (
31 has both shoulder portions removed compared to the conventional center core (1). The broken line area gt)@' indicates this removed portion.
第１、第２補強コア＋４１１５１はそれぞれ、」一部を
非磁性体（例えばガラス）Ｇｌｌ）１１で構成し、下部
を磁性体（例えばフェライト）に）輪で構成しており、
両者は接着材（６）Ｋよって一体化されている。両者の
接合面は士ンタコ７．（３）のフロントギャップＣｌＦ
Ｆ端の！ｌ！に下方に位置するように設計されているが
、 １磁性体−輪の上ＷｊＪｋ開設せる切欠孔＠
１輪がセンタコア（３）のコイル窓■に適合するように
構成されている。Each of the first and second reinforcing cores +41151 is composed of a ring with a part made of a non-magnetic material (e.g. glass) 11 and a lower part made of a magnetic material (e.g. ferrite),
Both are integrated with adhesive (6)K. 7. The joint surface between the two is tacho. (3) Front gap ClF
F end! l! Although it is designed to be located below the magnetic body, there is a cutout hole that opens above the ring.
One wheel is configured to fit into the coil window (3) of the center core (3).
第１補強コア（４）は媒体当接面（Ｓ）に開口や４を持
つようにセンタコア（３）を埋設するための凹ｆｋに）
を開設している。この凹所■はセンタコア（３）の外形
にはり一致し、該凹所■白化センタコア（３）を装着し
たとき第１補強コア（４）とセンタコア（３）とが略画
−になるようにしている。仁のためセンタコア（３）は
第１補強コア（４）の磁性体−によって４方面から囲ま
れることになる。そのため、センタコア（３）と第１補
強コア（４）の間に接着材を介挿させる必要がなく、セ
ンタコＴ（３）と幅１補強コア（４）の磁性体（６）と
の間の磁気抵抗を小さくすることができる。尚、この凹
所に）の開設は平担な素材にレーザビームを該凹所に倣
うように走査させることによって極めて簡単に実行でき
るものである。The first reinforcing core (4) is in the recess fk for burying the center core (3) so that it has an opening or 4 on the medium contact surface (S))
has been established. This recess (2) matches the outer shape of the center core (3), so that when the whitened center core (3) is attached to the recess (2), the first reinforcing core (4) and the center core (3) form a schematic diagram -. ing. Because of this, the center core (3) is surrounded from four sides by the magnetic material of the first reinforcing core (4). Therefore, there is no need to insert an adhesive between the center core (3) and the first reinforcing core (4), and there is no need to insert an adhesive between the center core (3) and the magnetic material (6) with a width of 1 reinforcing core (4). Magnetic resistance can be reduced. Incidentally, opening of the recess) can be extremely easily performed by scanning a flat material with a laser beam so as to follow the recess.
第２補強コア（５）はセンタコアロ）を凹所■内に収容
した第１補強コア（４）に載置され、それによってセン
タコア９）を封止する。第２補強コア（６）とこれに対
向するセンタコア（３）及び第１補強コア（４）間には
接着材（７）を介装させ、全体を一体化する。The second reinforcing core (5) is placed on the first reinforcing core (4) containing the center core (4) in the recess (2), thereby sealing the center core (9). An adhesive (7) is interposed between the second reinforcing core (6), the opposing center core (3), and the first reinforcing core (4) to integrate the whole.
以上説明した本発明の磁気ヘッドはセンタコア（３）の
テープ当接面を極めて小さくできるので単４１面積当た
りのテープ当接圧を大きくでき、相対的にスペーシング
ロスを小さくできるので再生出力を向上させることがで
きる。これは、磁気ヘッドの運用により摩耗が進行して
も維持される。センタコアの両肩部を除去しているので
テープ当接長が従来例程には大きくならないからである
。第６図は再生出力の対時間特性を示し、実線（Ａ＋は
本発明の特性例、破線（均は第１図の従来例の特性例で
ある。本発明では図示の如く長時間にわたって再生出力
の低下率を小さくすることができている。In the magnetic head of the present invention as described above, the tape contact surface of the center core (3) can be made extremely small, so the tape contact pressure per 41 area can be increased, and the spacing loss can be relatively reduced, so the playback output can be improved. can be done. This is maintained even if wear progresses due to operation of the magnetic head. This is because both shoulders of the center core are removed, so the tape contact length is not as large as in the conventional example. FIG. 6 shows the characteristics of the reproduction output over time, where the solid line (A+ is an example of the characteristic of the present invention and the broken line (average is an example of the characteristic of the conventional example in FIG. 1). We have been able to reduce the rate of decline in
さらに、本発明の磁気ヘッドはセンタコアの下部磁路の
周囲に磁性８体を添接させ、また−面を除きセンタコア
と磁性体を直接、当接するようにしているのて、再生出
力の対周波数特性を向上させることがで奮る。第７！Ｉ
Ａは仁の特性図を示し、実線囚は本発明の実施例、破線
閲は従来例のそれぞれ特性を示している。Further, in the magnetic head of the present invention, eight magnetic bodies are attached around the lower magnetic path of the center core, and the center core and the magnetic bodies are in direct contact with each other except for the negative side, so that the frequency of the reproduction output is I am inspired by improving my characteristics. Seventh! I
A shows a characteristic diagram of the conventional example, solid lines indicate the embodiment of the present invention, and dashed lines indicate the characteristics of the conventional example.
第１図は従来の磁気ヘッドの構成斜視図である。
第２図乃至第５図は何れも本発明の実施例を示し、第２
図は分解斜視図、Ｉｉ！３図は組立斜視図、第４図及び
第５図はそれぞれ中央部縦、横断面図である。第６図は
再生出力低下率の対時間特性図、第７図は再生出力の対
周波数特性図である。
主な図番の説明
（３）・・・センタコア、＋４１＋５１・・・第１、第
２補強コア、に）・・・凹所。
出願人 三洋電機株式会社FIG. 1 is a perspective view of a conventional magnetic head. 2 to 5 each show an embodiment of the present invention, and a second embodiment of the present invention is shown in FIG.
The figure is an exploded perspective view, Ii! FIG. 3 is an assembled perspective view, and FIGS. 4 and 5 are longitudinal and cross-sectional views of the central portion, respectively. FIG. 6 is a graph of the reproduction output reduction rate versus time, and FIG. 7 is a graph of the reproduction output versus frequency. Explanation of main drawing numbers (3)...Center core, +41+51...1st and 2nd reinforcing cores, etc.)...Recess. Applicant: Sanyo Electric Co., Ltd.
Claims (1)
構成してなる第１補強コアに、前記上部の媒体当接面Ｋ
１８口を有するように凹所を開設し、該凹所内にフロン
トギャップとコイル窓を有するセンタコアを収容し、こ
れを上部を非磁性体で構成しかつ下部を磁性体で構成し
てなる第２補強コアで封止していることを特徴とする磁
気ヘッド。 （２）前記センタコアは合金磁性材料（たとえばセンダ
スト）て構成されており、該センタコアは前記非磁性体
（たとえばガラス月こ比べて記録媒体に対する摩耗性が
小さい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。[Claims] +l) A first reinforcing core having an upper portion made of a non-magnetic material and a lower portion made of a magnetic material, the upper medium contacting surface K
A second recess is formed to have 18 openings, a center core having a front gap and a coil window is housed in the recess, and the upper part is made of a non-magnetic material and the lower part is made of a magnetic material. A magnetic head characterized by being sealed with a reinforced core. (2) The center core is made of an alloy magnetic material (for example, sendust), and the center core has less abrasion against the recording medium than the non-magnetic material (for example, glass). The magnetic head described in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7870482A JPS58196617A (en) | 1982-05-10 | 1982-05-10 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7870482A JPS58196617A (en) | 1982-05-10 | 1982-05-10 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58196617A true JPS58196617A (en) | 1983-11-16 |
Family
ID=13669250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7870482A Pending JPS58196617A (en) | 1982-05-10 | 1982-05-10 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58196617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199215A (en) * | 1985-03-01 | 1986-09-03 | Matsushita Electric Ind Co Ltd | Rotary head assembly |
| EP0572249A2 (en) * | 1992-05-27 | 1993-12-01 | Kabushiki Kaisha Toshiba | Laminated magnetic head and method for manufacturing thereof |
-
1982
- 1982-05-10 JP JP7870482A patent/JPS58196617A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199215A (en) * | 1985-03-01 | 1986-09-03 | Matsushita Electric Ind Co Ltd | Rotary head assembly |
| EP0572249A2 (en) * | 1992-05-27 | 1993-12-01 | Kabushiki Kaisha Toshiba | Laminated magnetic head and method for manufacturing thereof |
| EP0572249A3 (en) * | 1992-05-27 | 1994-08-31 | Toshiba Kk |
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