JPH053645B2 - - Google Patents
Info
- Publication number
- JPH053645B2 JPH053645B2 JP8833384A JP8833384A JPH053645B2 JP H053645 B2 JPH053645 B2 JP H053645B2 JP 8833384 A JP8833384 A JP 8833384A JP 8833384 A JP8833384 A JP 8833384A JP H053645 B2 JPH053645 B2 JP H053645B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- head
- core half
- magnetic head
- layer
- 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 - Lifetime
Links
- 239000000696 magnetic material Substances 0.000 claims description 10
- 229910000702 sendust Inorganic materials 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、磁気ヘツド、特に複合ヘツド等に使
用する磁気ヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a magnetic head, particularly to a magnetic head used in a composite head or the like.
VTR（ビデオテープレコーダ）において、低
速，静止画などの特殊目的再生用の磁気ヘツドと
して、従来より、互に対称のアジマス角を有する
一対の磁気ヘツド単体を、対称対向的に支持体上
に配設した複合磁気ヘツド、いわゆるダブルアジ
マスヘツドがある。第１図Ａは、この種ヘツドに
使用される従来例の一対の一方の単体磁気ヘツド
Ｈの上面図、また同図Ｂ，Ｃは、上記磁気ヘツド
Ｈと、このヘツドＨ対称のアジマス角を有する一
対の他方のヘツドH′とを支持体８上に対称位置
に対向して固着して成る従来のダブルアジマスヘ
ツドの一例のそれぞれ上面図と側面図とを示す。
１，２はそれぞれギヤツプ、３，４および５，６
は各コア半体、７は補強材、９はコイル用窓であ
り、コイル自体は省略して示す。
In VTRs (video tape recorders), a pair of single magnetic heads having symmetrical azimuth angles are conventionally arranged symmetrically and oppositely on a support as a magnetic head for special purpose playback of low-speed, still images, etc. There is a composite magnetic head, the so-called double azimuth head. Figure 1A is a top view of a single magnetic head H, one of a pair of conventional heads used in this type of head, and Figures B and C show the azimuth angle of the magnetic head H and its symmetry. A top view and a side view are shown, respectively, of an example of a conventional double azimuth head formed by fixing the other head H' of the pair on a support 8 in symmetrical positions.
1 and 2 are gap, 3, 4 and 5, 6 respectively
denotes each core half, 7 is a reinforcing material, and 9 is a window for the coil; the coil itself is omitted from illustration.
VTRの構成上、この種複合磁気ヘツドのギヤ
ツプ１，２の間隔は、ビデオ信号の１水平同期期
間（1H）にヘツドが移動する距離をHsとすると
き、1Hs，1.5Hs，2Hs等の極めて狭い間隔とし
なければならない制約があるため、磁気回路を構
成する各コア半体４，６は、必然的に、ギヤツプ
形成面１ａ，２ａ間の各垂方向の長さの小さいも
ので構成しなければならなくなる。したがつて、
この部分では磁気回路の断面積が小さくなり、磁
気抵抗が増加して、電磁変換特性を低下させると
いう問題点があつた。 Due to the structure of the VTR, the gap between gaps 1 and 2 of this type of composite magnetic head is extremely large, such as 1Hs, 1.5Hs, or 2Hs, where Hs is the distance the head moves during one horizontal synchronization period (1H) of the video signal. Since there is a restriction that the spacing must be narrow, each of the core halves 4 and 6 constituting the magnetic circuit must necessarily have a small length in each vertical direction between the gap forming surfaces 1a and 2a. It will stop happening. Therefore,
There was a problem in that the cross-sectional area of the magnetic circuit became smaller in this part, increasing the magnetic resistance and deteriorating the electromagnetic conversion characteristics.
本発明は、以上のような問題点にかんがみてな
されたもので、上述従来例の欠点を除去し、磁気
飽和を生じ難く電磁変換特性を向上した磁気ヘツ
ドを提供しようとするものである。
The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to eliminate the drawbacks of the above-mentioned conventional examples, and to provide a magnetic head that is less likely to cause magnetic saturation and has improved electromagnetic conversion characteristics.
以下に本発明を図面に基づいて説明する。第２
図ＡないしＦに、本発明の一実施例の製作各工程
図を示す。まず第２図Ａに示すごとく、所定寸法
に切断したガラス等の非磁性体基板１１および、
幅を所定のトラツク幅ｄに切断したセンダスト等
の磁性体１２のブロツクを複数組用意する。つぎ
に第２図Ｂに示すごとく、上記２つの各ブロツク
を交互に、低融点ガラス等を用いて接着する。
The present invention will be explained below based on the drawings. Second
Figures A to F show manufacturing process diagrams of an embodiment of the present invention. First, as shown in FIG. 2A, a non-magnetic substrate 11 such as glass cut into a predetermined size,
A plurality of blocks of magnetic material 12, such as sendust, cut to a predetermined track width d are prepared. Next, as shown in FIG. 2B, the two blocks described above are alternately bonded together using low-melting glass or the like.
ついで、第２図Ｃに示すごとく、アジマス角θ
だけ傾けて一点鎖線部を切断する。 Then, as shown in FIG. 2C, the azimuth angle θ
Tilt it and cut along the dashed-dotted line.
ついで、第２図Ｄに示すごとく、切断したブロ
ツクにコイル窓用のみぞ１３を設け、ギヤツプ形
成面となる面１７ａを平滑に研磨し、ギヤツプス
ペーサ（図示せず）を、スパツタリング等によつ
て形成する。また別に、所定寸法に切断したセン
ダスト等の磁性材料１５のブロツクを用意する。 Next, as shown in FIG. 2D, a groove 13 for a coil window is formed in the cut block, a surface 17a that will become a gap forming surface is polished smooth, and a gear spacer (not shown) is formed by sputtering or the like. do. Separately, a block of magnetic material 15, such as sendust, cut to a predetermined size is prepared.
つぎに、上記Ｄ図に示す２つのブロツクを、第
２図Ｅに示すように、低融点ガラス等を用いて接
合し、一点鎖線部で示す所定厚さに切断して、複
数の磁気ヘツド単体素材を得るものである。 Next, as shown in FIG. 2E, the two blocks shown in FIG. It is used to obtain materials.
ついで、切断された単体の磁気ヘツド素材の、
テープ等の媒体接触相当面を凸面弧状に加工し
て、第２図Ｆの上面図に示すような磁気ヘツド
H1を完成する。 Next, the single piece of magnetic head material that was cut was
The surface corresponding to contact with a medium such as a tape is processed into a convex arc shape to create a magnetic head as shown in the top view of Figure 2F.
Complete H 1 .
上記と対称方向のアジマス角を有する一対の他
方の単体磁気ヘツドは、上記と全く同様の工程で
製造され、かくして得られた対称の磁気ヘツド
H1′を、前記磁気ヘツドH1と共に、第２図Ｇ，Ｈ
に示すように、支持体１６上に対称対向の所定位
置に接着し、コイルを施せば、高性能のダブルア
ジマスヘツドを得ることができる。図中、１７，
１８はギヤツプ、１７ａはギヤツプ形成面、１９
は、ガラス等の非磁性体層補強板、２０，２１
は、センダスト等の磁性体層である。 The other single magnetic head of the pair having an azimuth angle symmetrical to the above is manufactured in exactly the same process as above, and the symmetrical magnetic head thus obtained is
H 1 ′ together with the magnetic head H 1 in FIG.
As shown in FIG. 2, a high performance double azimuth head can be obtained by gluing the coils onto a support 16 at symmetrically opposed predetermined positions and applying coils thereto. In the figure, 17,
18 is a gap, 17a is a gap forming surface, 19
is a non-magnetic material layer reinforcing plate such as glass, 20, 21
is a magnetic layer made of Sendust or the like.
つぎに他の実施例の製造工程図を第３図Ａない
しＦに示す。通常のコア幅を有するコア半体は、
前記第１実施例で示した第２図ＡないしＣと全く
同様にして得られる。
Next, manufacturing process diagrams of other embodiments are shown in FIGS. 3A to 3F. A core half with normal core width is
It can be obtained in exactly the same manner as shown in FIGS. 2A to 2C shown in the first embodiment.
つぎに、第３図Ａに示すように、高透磁率フエ
ライトのブロツク２２およびセンダスト等の磁性
体の半体ブロツク１２を所定寸法に切断する。セ
ンダスト等の磁性体の幅は、トラツク幅ｄの寸法
としておく。 Next, as shown in FIG. 3A, the block 22 of high magnetic permeability ferrite and the half block 12 of magnetic material such as sendust are cut into predetermined dimensions. The width of the magnetic material such as sendust is set to the track width d.
つぎに、第３図Ｂに示すように、これら２種類
の各半体ブロツクを、低融点ガラス等を用いて接
合する。 Next, as shown in FIG. 3B, these two types of half blocks are joined using low melting point glass or the like.
ついで、第３図Ｃのように、アジマス角θだけ
傾けて一点鎖線部で複数個に切断する。 Then, as shown in FIG. 3C, it is tilted by an azimuth angle θ and cut into a plurality of pieces along the dashed line.
つぎに、前記第１実施例において得たコア半体
と同様にして製作したコア半体ブロツク２３に、
前工程第３図Ｃで切断したコア半体ブロツク２４
を、低融点ガラス等を用いて接合する。第３図Ｄ
は、接合前の両ブロツクを示す。この時コア半体
ブロツク２４のセンダストよりなる層はコア半体
ブロツク２３の磁性体層と対向し、コア半体ブロ
ツク２４の高透磁率フエライトよりなる層はコア
半体ブロツク２３の非磁性体層と対向する様接合
する。 Next, a core half block 23 manufactured in the same manner as the core half obtained in the first embodiment was
Core half block 24 cut in the previous step in Figure 3C
are bonded using low melting point glass or the like. Figure 3D
shows both blocks before joining. At this time, the layer made of sendust of the core half block 24 faces the magnetic layer of the core half block 23, and the layer made of high magnetic permeability ferrite of the core half block 24 faces the nonmagnetic layer of the core half block 23. Join so that they are facing each other.
ついで、第３図Ｅに示すように、所定の寸法に
切断して（一点鎖線）、複数の単体磁気ヘツド素
材を得る。つぎに、切断された単体磁気ヘツド素
材の媒体接触相当面を凸面弧状に加工し、第３図
Ｆの上面図に示すような磁気ヘツドH2を完成す
る。 Then, as shown in FIG. 3E, the magnetic head material is cut into predetermined dimensions (dotted and dashed lines) to obtain a plurality of single magnetic head materials. Next, the medium contacting surface of the cut single magnetic head material is processed into a convex arc shape to complete the magnetic head H2 as shown in the top view of FIG. 3F.
上記と対称方向のアジマス角を有する一対の他
の単体磁気ヘツドH′2は、上記と全く同様の工程
で製造され、かくして得られた対称ヘツドH′2
を、前記ヘツドH2と共に、第３図Ｇ，Ｈに示す
ように、支持体２５上に対称的に対向する所定位
置に接着し、コイルを施せば、前記第１実施例と
同様高性能で、しかも耐摩耗性のすぐれたダブル
アジマスヘツドを提供することができる。図中、
２６は、ギヤツプ、２６ａはギヤツプ形成面、２
７，２９は、センダスト等の磁性体層、２８は、
フエライト等の軟磁性体層、３０は、ガラス等の
非磁性体補強板である。 A pair of other single magnetic heads H' 2 having azimuth angles in the symmetrical direction to the above are manufactured in exactly the same process as the above, and the symmetrical heads H' 2 thus obtained are
are bonded together with the head H2 at predetermined positions symmetrically facing each other on the support 25 as shown in FIGS. 3G and 3H, and a coil is applied thereto. Moreover, it is possible to provide a double azimuth head with excellent wear resistance. In the figure,
26 is a gap, 26a is a gap forming surface, 2
7 and 29 are magnetic layers such as Sendust, and 28 is
The soft magnetic material layer 30, such as ferrite, is a non-magnetic reinforcing plate such as glass.
本実施例においては、上記コア半体の両外側面
を軟磁性フエライトで構成するようにしたため、
電磁変換特性の向上に加え、耐摩耗性の優秀な磁
気ヘツドを得ることができる。 In this example, since both outer surfaces of the core halves are made of soft magnetic ferrite,
In addition to improved electromagnetic conversion characteristics, a magnetic head with excellent wear resistance can be obtained.
以上、実施例を用いて説明してきたように、本
発明によれば、長さの短い方のコア半体部分の全
体を磁性体で構成するようにしたため、磁気抵抗
を減少させることができ、また、コアの磁気飽和
を生じ難くなり、電磁変換特性の優れた磁気ヘツ
ドを得ることができる。
As described above using the embodiments, according to the present invention, since the entire shorter core half is made of a magnetic material, the magnetic resistance can be reduced. Furthermore, magnetic saturation of the core is less likely to occur, and a magnetic head with excellent electromagnetic conversion characteristics can be obtained.
第１図Ａは、従来の複合磁気ヘツド用の一対の
一方の磁気ヘツドの一例の上面図、第１図Ｂ，Ｃ
は上記ヘツドを使用した従来の複合磁気ヘツドの
それぞれ上面図と側面図、第２図ＡないしＦは、
本発明の第１実施例の製作各工程図、第２図Ｇ，
Ｈは、それぞれ第２図Ｆのヘツドを使用した複合
磁気ヘツドの上面図と側面図、第３図ＡないしＦ
は、本発明の第２実施例の製作各工程図、第３図
Ｇ，Ｈは、それぞれ第３図Ｆを使用した複合ヘツ
ドの上面図と側面図を示す。
１７，１８，２６……ギヤツプ、１７ａ，２６
ａ……ギヤツプ形成面、１９，３０……非磁性体
層補強板、２０，２７……第１コア半体（磁性体
層）、２１……第２コア半体、２８……フエライ
ト等の軟磁性体層（第２磁性体層）、２９……セ
ンダスト等の磁性体層（第１磁性体層）、H1，
H′1，H2，H′2……磁気ヘツド、ｄ……トラツク
幅、θ……アジマス角。
FIG. 1A is a top view of an example of one magnetic head of a pair of conventional composite magnetic heads, and FIGS. 1B and C
2A to 2F are top and side views of a conventional composite magnetic head using the above head, respectively, and FIGS.
Manufacturing process diagrams of the first embodiment of the present invention, Figure 2G,
H are top and side views of a composite magnetic head using the head of FIG. 2F, and FIGS. 3A to F, respectively.
3A and 3B are manufacturing process diagrams of the second embodiment of the present invention, and FIGS. 3G and 3H are a top view and a side view, respectively, of a composite head using FIG. 3F. 17, 18, 26... Gap, 17a, 26
a... Gap forming surface, 19, 30... Non-magnetic layer reinforcing plate, 20, 27... First core half (magnetic layer), 21... Second core half, 28... Ferrite, etc. Soft magnetic layer (second magnetic layer), 29...magnetic layer such as Sendust (first magnetic layer), H 1 ,
H′ 1 , H 2 , H′ 2 ...Magnetic head, d...Track width, θ...Azimuth angle.
Claims (1)
がギヤツプ形成面内に存在する第１のコア半体
と、磁性体のみより成り前記ギヤツプ形成面に対
して垂直方向のコア長が前記第１のコア半体より
短い第２のコア半体とを突合わせて成る磁気ヘツ
ド。 ２ 前記第２のコア半体が前記第１のコア半体の
磁性体層と対向する第１の磁性体層と、前記非磁
性体層と対向する第２の磁性体層とを含むことを
特徴とする特許請求の範囲第１項記載の磁気ヘツ
ド。[Scope of Claims] 1. A first core half having a non-magnetic material layer and a magnetic material layer, both of which are present within the gap forming surface, and a first core half made of only a magnetic material and facing the gap forming surface. and a second core half having a vertical core length shorter than the first core half. 2. The second core half includes a first magnetic layer facing the magnetic layer of the first core half, and a second magnetic layer facing the non-magnetic layer. A magnetic head according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8833384A JPS60234208A (en) | 1984-05-04 | 1984-05-04 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8833384A JPS60234208A (en) | 1984-05-04 | 1984-05-04 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60234208A JPS60234208A (en) | 1985-11-20 |
| JPH053645B2 true JPH053645B2 (en) | 1993-01-18 |
Family
ID=13939943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8833384A Granted JPS60234208A (en) | 1984-05-04 | 1984-05-04 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60234208A (en) |
-
1984
- 1984-05-04 JP JP8833384A patent/JPS60234208A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60234208A (en) | 1985-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |