JPH06119615A - Magnetic head - Google Patents

Abstract

PURPOSE:To improve a tape-contact characteristic by symmetrically forming notched parts for regulating the track width of the magnetic head having a large azimuth angle and inclining the direction of the ridge line of sliding surfaces from a traveling surface. CONSTITUTION:This magnetic head 10 consists of magnetic cores 1a, 1b, a working gap 2, the notched part 3, glass 4 and a signal coil 5. The traveling axis is 9A-8B and the direction perpendicular thereto is 9A-9B. The direction 2A-2B of the working gap 2 inclines by the azimuth angle alpha from the straight line 9A-9B. A pair of magnetic cores 1a, 1b are butted against each other via the working gap 2 and the opposite flat parts of these cores 1a, 1b are so formed as to be held to a prescribed track width by the notched parts 3a, 3a', 3b, 3b' provided on both sides thereof. The magnetic head 10 is mounted to a rotary drum 10 via a head base 22 and the sticking part 23 of the magnetic head 10 within the base 22 is inclined by an angle beta with the mounting surface 21 of the rotary drum 20.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明はＶＴＲ等のごとく媒体と
接触摺動する磁気ヘッドに係り、特に高速走行時に安定
した接触を可能にするヘッド構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head that contacts and slides with a medium such as a VTR, and more particularly to a head structure that enables stable contact during high speed running.

【０００２】[0002]

【従来の技術】周知のごとく従来のＶＴＲ用磁気ヘッド
は、作動ギャップを介し、対向する平坦部の幅が両側に
設けた切欠きにより所定のトラック幅に狭めるような一
対の磁気コア（フェライト）を突き合わせた構造となっ
ている。また必要に応じて、その突合せ面に金属磁性膜
を配設したメタル−イン−ギャップヘッド（ＭＩＧ）も
実用化されている。2. Description of the Related Art As is well known, a conventional magnetic head for a VTR has a pair of magnetic cores (ferrites) in which the widths of opposing flat portions are narrowed to a predetermined track width by notches provided on both sides via an operating gap. It has a structure in which In addition, a metal-in-gap head (MIG) having a metal magnetic film provided on its abutting surface has been put into practical use as needed.

【０００３】図６はアジマス角αを付与した従来の磁気
ヘッドの摺動面形状を示す。１ａ，１ｂはフェライトか
らなる一対の磁気コア、２は作動ギャップ、３ａ，３
ａ’，３ｂ，３ｂ’は切欠き部、４，４’は切欠きに充
填したガラスである。２Ａ−２Ｂは作動ギャップの延長
線、２Ａ’−２Ｂ’は作動ギャップ面に立てた垂線であ
る。通常は磁気コア１ａ，１ｂに施す切欠きの形状は破
線３０，３０’のごとく２Ａ−２Ｂ軸，２Ａ’−２Ｂ’
軸に関し対称なので、そのままアジマス角αを付与する
と、テープ・ヘッド走行軸８Ａ−８Ｂに関し配置が非対
称になる。テープ走行による材料摩耗は一般にガラス
４，４’は磁気コア１ａ，１ｂより大きいので、走行後
の摺動面には走行軸に関し非対称な表面凹凸が形成され
る。言い替えれば摺動面の当接マーク（十分な面圧でも
って接触する領域）の長手方向が走行軸を向かない。こ
のような非対称性はテープ・ヘッドの動的な当接を不安
定にしスペーシング損失を増大させる。この問題はアジ
マス角が大きいほど、また走行速度が大きいほど顕著で
ある。FIG. 6 shows a sliding surface shape of a conventional magnetic head having an azimuth angle α. 1a, 1b are a pair of magnetic cores made of ferrite, 2 is an operating gap, 3a, 3
Reference numerals a ', 3b and 3b' are notches, and reference numerals 4 and 4'are glasses filled in the notches. 2A-2B is an extension line of the working gap, and 2A'-2B 'is a vertical line standing on the working gap surface. Normally, the shapes of the notches formed in the magnetic cores 1a and 1b are 2A-2B axes and 2A'-2B 'as shown by broken lines 30 and 30'.
Since they are symmetric with respect to the axes, if the azimuth angle α is applied as they are, the arrangement becomes asymmetric with respect to the tape head traveling axes 8A-8B. In general, the glass 4 and 4 ′ is larger than the magnetic cores 1 a and 1 b in terms of material wear due to running of the tape, so that the sliding surface after running has asymmetric surface irregularities with respect to the running axis. In other words, the longitudinal direction of the contact mark on the sliding surface (the area that contacts with sufficient surface pressure) does not face the traveling axis. Such asymmetry destabilizes the dynamic abutment of the tape head and increases spacing losses. This problem becomes more remarkable as the azimuth angle increases and the traveling speed increases.

【０００４】この対策の一つとして、特開昭５７−１４
１０１２号公報に開示された方法がある。これは図６に
示すように、切欠き部を３ａ，３ａ’，３ｂ，３ｂ’の
ように走行軸８Ａ−８Ｂに関し対称に配置する方法であ
る。これを得るには、各切欠き部を作動ギャップに立て
た垂線２Ａ’−２Ｂ’に関しアジマス角αだけ非対称に
形成してやればよい。これによれば摺動面が摩耗しても
当接マークの長手方向は走行軸に一致し、テープ・ヘッ
ドの当接を安定にすることができる。As one of countermeasures against this, Japanese Patent Laid-Open No. 57-14
There is a method disclosed in Japanese Patent No. 1012. As shown in FIG. 6, this is a method of arranging the notches symmetrically with respect to the traveling shafts 8A-8B like 3a, 3a ', 3b, 3b'. In order to obtain this, each notch may be formed asymmetrically by the azimuth angle α with respect to the vertical line 2A′-2B ′ standing in the working gap. According to this, even if the sliding surface is worn, the longitudinal direction of the contact mark coincides with the running axis, and the contact of the tape head can be stabilized.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら上記磁気
ヘッドの場合、次の課題を有している。However, the above magnetic head has the following problems.

【０００６】まず製法上の問題として、切欠き部を非対
称に形成する煩雑さが伴う。すなわち新たに傾斜治具あ
るいは特殊形状の砥石が必要になる。またＭＩＧヘッド
の場合、金属磁性膜を切欠き斜面にも配設させることに
なるが、スパッタリング方法では角度の非対称な斜面部
に均一に被着するのが困難であり、ひいてはヘッド性能
のばらつきの原因になる。First, as a problem in the manufacturing method, the complexity of forming a notch portion asymmetrically is involved. That is, a tilting jig or a grindstone with a special shape is newly required. Further, in the case of the MIG head, the metal magnetic film is also provided on the notch slope, but it is difficult to apply the metal magnetic film evenly to the slope part having an asymmetric angle by the sputtering method, and as a result, variations in head performance occur. Cause.

【０００７】さらに性能の問題としてアジマス角が大き
くなるほど、記録効率が低下し作動ギャップ近傍の磁気
飽和が生じやすくなる。これは磁気コアの実効磁路断面
積が作動ギャップ位置にて拡大する結果、磁束密度がｃ
ｏｓα倍に低下するからである。Further, as a performance problem, the larger the azimuth angle, the lower the recording efficiency and the more easily magnetic saturation occurs near the working gap. This is because the effective magnetic path cross-sectional area of the magnetic core expands at the working gap position, resulting in a magnetic flux density of c.
This is because it is decreased by osα times.

【０００８】本発明は上記の点に鑑みなされたもので、
その目的は、テープ当接が良好な高アジマス角ヘッドを
容易に製造でき、かつ記録効率の低下のない磁気ヘッド
を提供することである。The present invention has been made in view of the above points,
It is an object of the present invention to provide a magnetic head which can easily manufacture a high azimuth angle head with good tape contact and which does not deteriorate recording efficiency.

【０００９】[0009]

【課題を解決するための手段】上記の目的を達成するた
め本発明の磁気ヘッドでは、アジマス角αを付与した作
動ギャップを介し、平坦部の幅が両側に設けた切欠き部
により狭まるごとき一対の磁気コアを突き合わせた磁気
ヘッドにおいて、該切欠き部は該作動ギャップ面に立て
た垂線に関し対称なる形状とし、媒体に当接する摺動面
の摺動方向稜線を媒体・ヘッド走行軸（以下走行軸とよ
ぶ）に対しアジマス角付与方向と反対方向に角度β（以
下稜線角とよぶ）だけ傾斜させた。さらに上記稜線角β
をアジマス角αに等しく設定したことに特徴がある。In order to achieve the above object, the magnetic head of the present invention has a pair of flat portions whose widths are narrowed by notches provided on both sides via an operating gap having an azimuth angle α. In the magnetic head in which the magnetic cores of the above are abutted, the notch has a shape symmetrical with respect to the perpendicular line standing on the operation gap surface, and the ridge line in the sliding direction of the sliding surface that contacts the medium is set to the medium / head traveling axis It is tilted by an angle β (hereinafter referred to as a ridge line angle) in the direction opposite to the azimuth angle application direction with respect to the axis. Furthermore, the above ridge angle β
Is characterized in that is set equal to the azimuth angle α.

【００１０】[0010]

【作用】テープ走行後の摺動面形状、すなわち当りマー
クの方向は以下のように形成される。作動ギャップ近傍
では切欠き形状の影響を強く受け、当りマーク方向は走
行軸からアジマス角αだけその付与方向に傾斜しようと
する。一方作動ギャップの遠方では、切欠きの影響は受
けず摺動面稜線の影響により、当りマーク方向は走行軸
から稜線角βだけ反対方向に傾斜しようとする。これら
の作用が合成，相殺されて、当りマークはより走行軸方
向に形成される。特に角αとβが等しいとき当りマーク
は走行軸に一致する。これによりテープ・ヘッドの当接
状態は走行軸に関し対称になり、安定な接触が実現す
る。The shape of the sliding surface after running the tape, that is, the direction of the hit mark is formed as follows. The notch shape is strongly influenced in the vicinity of the operating gap, and the hit mark direction tends to be inclined from the traveling axis by the azimuth angle α in the applying direction. On the other hand, at a distance from the working gap, the contact mark direction tends to incline in the opposite direction from the traveling axis by the ridge line angle β due to the influence of the sliding surface ridge line without being affected by the notch. These effects are combined and offset, and the hit mark is formed more in the traveling axis direction. Especially when the angles α and β are equal, the hit mark coincides with the traveling axis. As a result, the contact state of the tape head becomes symmetrical with respect to the traveling axis, and stable contact is realized.

【００１１】本発明の構造によれば、切欠き形状が作動
ギャップ面の垂線に関し対称なので切欠き部の加工やＭ
ＩＧヘッドにおける成膜に関し製造が容易である。また
磁路形状は、その断面積が作動ギャップに向かい常に縮
小する構造なので記録効率が低下することはない。According to the structure of the present invention, since the shape of the cutout is symmetric with respect to the vertical line of the operation gap surface, machining of the cutout portion or M
It is easy to manufacture for film formation in the IG head. Further, the magnetic path shape has a structure in which its cross-sectional area is constantly reduced toward the working gap, so that the recording efficiency is not lowered.

【００１２】[0012]

【実施例】以下本発明の実施例を図面を用いて説明す
る。Embodiments of the present invention will be described below with reference to the drawings.

【００１３】図１は本発明による磁気ヘッドの第１の実
施例で、（ａ）はその斜視図、（ｂ）は摺動面形状、
（ｃ）はドラム取付け状態を示す。磁気ヘッド１０は、
磁気コア１ａ，１ｂ、作動ギャップ２、切欠き部３、ガ
ラス４、信号コイル５からなる。走行軸を８Ａ−８Ｂ、
これに垂直な方向を９Ａ−９Ｂとする。作動ギャップ２
の方向２Ａ−２Ｂは直線９Ａ−９Ｂからアジマス角αだ
け（この実施例では時計回り方向に１０〜２０゜）傾斜
している。作動ギャップ２を介し一対の磁気コア（フェ
ライト）１ａ，１ｂが突き合わされ、該磁気コア１ａ，
１ｂの対向する平坦部は、その両側に設けた切欠き部３
ａ，３ａ’，３ｂ，３ｂ’により所定のトラック幅に狭
まるごとき構造としている。この実施例では切欠きの形
状は略Ｕ字状とした。一対の切欠き部、即ち３ａと３
ａ’、及び３ｂと３ｂ’は該作動ギャップ２の垂線２
Ａ’−２Ｂ’に関し対称なる形状としている。また媒体
に当接する摺動面の摺動方向稜線６，６’をその走行軸
８Ａ−８Ｂに対しアジマス角付与方向と反対方向に角度
βだけ（反時計回り方向に１０〜２０゜）傾斜させてい
る。なお摺動面の摺動方向に直交する稜線７ａ，７ｂは
作動ギャップの延長線２Ａ−２Ｂと平行にしたがこれに
限るものではない。FIG. 1 shows a first embodiment of a magnetic head according to the present invention. (A) is a perspective view thereof, (b) is a sliding surface shape,
(C) shows a drum attachment state. The magnetic head 10
The magnetic cores 1a and 1b, the operating gap 2, the cutout portion 3, the glass 4, and the signal coil 5 are included. The traveling axis is 8A-8B,
The direction perpendicular to this is designated as 9A-9B. Working gap 2
2A-2B is inclined from the straight line 9A-9B by the azimuth angle α (10 to 20 ° in the clockwise direction in this embodiment). A pair of magnetic cores (ferrites) 1a and 1b are butted against each other via an operating gap 2,
Opposing flat portions of 1b are notched portions 3 provided on both sides thereof.
The structure is such that it is narrowed to a predetermined track width by a, 3a ', 3b and 3b'. In this embodiment, the notch has a substantially U shape. A pair of notches, 3a and 3
a ', and 3b and 3b' are perpendicular lines 2 of the working gap 2.
The shape is symmetric with respect to A′-2B ′. Further, the sliding direction ridgelines 6 and 6'of the sliding surface that contacts the medium are inclined with respect to the traveling shafts 8A-8B by an angle β (10 to 20 ° in the counterclockwise direction) in the direction opposite to the azimuth angle imparting direction. ing. The ridge lines 7a and 7b orthogonal to the sliding direction of the sliding surface are parallel to the extension lines 2A-2B of the working gap, but the invention is not limited to this.

【００１４】次に図１（ｃ）は磁気ヘッド１０の取付け
を示し、ヘッドベース２２を介し回転ドラム２０に取り
付けてある。ヘッドベース内の磁気ヘッド１０の貼り付
け部分２３は、回転ドラム２０の取付け面２１（すなわ
ち走行方向）に対し角度βだけ傾斜している。Next, FIG. 1C shows the attachment of the magnetic head 10, which is attached to the rotary drum 20 via the head base 22. The attachment portion 23 of the magnetic head 10 in the head base is inclined by an angle β with respect to the attachment surface 21 of the rotary drum 20 (that is, the traveling direction).

【００１５】次に図２は本発明の磁気ヘッドの動作説明
図である。テープが８Ａ−８Ｂ方向に相対走行すると、
干渉法で観察されるテープとの強い接触がなされる領
域、すなわち当りマークを斜線１２で示す。当たりマー
ク１２は通常楕円形をし、その長軸方向１３Ａ−１３Ｂ
が走行軸８Ａ−８Ｂとなす角をφとする。摺動面の摩耗
はガラス４，４’の部分が最も大きいので、テープとの
当接状態は主に磁気コア１ａ，１ｂの部分で決定され
る。作動ギャップの近傍では切欠きの影響を強く受け、
当たりマークの方向は走行軸８Ａ−８Ｂに対し角αだけ
傾斜しようとする。一方作動ギャップから遠ざかると稜
線６，６’の影響を強く受け稜線角βだけ傾斜しようと
する。その結果これらの作用が合成，相殺され、最終的
には当たりマークの方向はφ＝α−βの方向となり、走
行軸からのずれ角は低減する。特にα＝βとすればφ＝
０となり走行軸に一致する。その結果テープ・ヘッドの
当接が安定する。Next, FIG. 2 is a diagram for explaining the operation of the magnetic head of the present invention. When the tape runs relative to the 8A-8B direction,
An area where strong contact with the tape is observed by the interferometry, that is, a hit mark is indicated by a diagonal line 12. The hit mark 12 is usually oval, and its major axis direction is 13A-13B.
Let φ be the angle that the vehicle makes with the traveling axes 8A-8B. Since the abrasion of the sliding surface is greatest in the glass portions 4 and 4 ', the contact state with the tape is mainly determined by the magnetic core portions 1a and 1b. The vicinity of the working gap is strongly affected by the notch,
The direction of the hit mark tends to be inclined by the angle α with respect to the traveling axes 8A-8B. On the other hand, when it gets away from the working gap, it is strongly influenced by the ridgelines 6 and 6'and tends to be inclined by the ridgeline angle β. As a result, these actions are combined and offset, and finally the direction of the hit mark becomes the direction of φ = α-β, and the deviation angle from the traveling axis is reduced. In particular, if α = β, φ =
It becomes 0 and coincides with the traveling axis. As a result, the contact of the tape head becomes stable.

【００１６】この実施例では切欠き部の形状はその作動
ギャップ面の垂線２Ａ’−２Ｂ’に関し対称としたの
で、単一形状の砥石で極めて容易に加工できる。また磁
気回路の断面積は作動ギャップに向かい常に縮小する形
状なので、ギャップ近傍での磁気飽和がなく記録効率が
高い。これらの効果はアジマス角αが大きいほど顕著で
ある。In this embodiment, the shape of the notch is symmetric with respect to the perpendicular 2A'-2B 'of the working gap surface, so that it can be processed very easily with a single-shaped grindstone. Further, since the cross-sectional area of the magnetic circuit is constantly reduced toward the working gap, there is no magnetic saturation near the gap and the recording efficiency is high. These effects are more remarkable as the azimuth angle α is larger.

【００１７】次に図３は本発明の磁気ヘッドの第２の実
施例で、その摺動面形状を示す。その構成は、一対の磁
気コア（フェライト）１ａ，１ｂの突合せ面および切欠
き面に金属磁性膜１１，１１ａ，１１ｂ，１１ａ’，１
１ｂ’を配設した、いわゆるメタル−イン−ギャップ
（ＭＩＧ）構造である。金属磁性膜１１にはスパッタリ
ングで形成したアモルファスやセンダスト合金膜を用い
た。ＭＩＧ形ヘッドは、金属磁性膜１１の高飽和磁束密
度の作用によりフェライトヘッドに比べ記録能力が大幅
に向上し、高保磁力媒体に対し適している。走行軸８Ａ
−８Ｂに対するアジマス角α、稜線角βの設定のしかた
は前記図１の第１の実施例と同様である。またその動作
も図２と同様である。本実施例では切欠き部の形状はそ
の作動ギャップの垂線２Ａ’−２Ｂ’に関し対称とした
ので、切欠き内の金属磁性膜１１ａ，１１ｂ，１１
ａ’，１１ｂ’の膜厚や磁気特性をすべて均一に得るこ
とが出来る。従ってヘッド性能のばらつきが極めて少な
くなる。Next, FIG. 3 shows a second embodiment of the magnetic head of the present invention, showing the shape of its sliding surface. The configuration is such that the metal magnetic films 11, 11a, 11b, 11a ', 1 are provided on the abutting surface and the notched surface of the pair of magnetic cores (ferrites) 1a, 1b.
This is a so-called metal-in-gap (MIG) structure in which 1b 'is arranged. As the metal magnetic film 11, an amorphous or sendust alloy film formed by sputtering was used. The MIG type head is suitable for a high coercive force medium because the recording capacity is greatly improved as compared with the ferrite head due to the action of the high saturation magnetic flux density of the metal magnetic film 11. Travel axis 8A
The method of setting the azimuth angle α and the ridgeline angle β with respect to −8B is the same as in the first embodiment shown in FIG. The operation is also the same as in FIG. In the present embodiment, the shape of the cutout portion is symmetrical with respect to the normal 2A'-2B 'of the working gap, so that the metal magnetic films 11a, 11b, 11 inside the cutout portion are formed.
It is possible to obtain uniform film thicknesses and magnetic properties of a'and 11b '. Therefore, variations in head performance are extremely small.

【００１８】図４は本発明の磁気ヘッドの第３の実施例
を示すものである。（ａ）は切欠き部３ａ，３ａ’，３
ｂ，３ｂ’の形状をＶ字状とした。また（ｂ）は（ａ）
における一対の磁気コアの突合せ面と切欠き面に金属磁
性膜１１ａ，１１ａ’，１１ｂ，１１ｂ’を配設したも
のである。この場合の角α，βの設定も前と同様であ
る。FIG. 4 shows a third embodiment of the magnetic head of the present invention. (A) is notches 3a, 3a ', 3
The shapes of b and 3b 'were V-shaped. Also, (b) is (a)
The metal magnetic films 11a, 11a ', 11b, 11b' are provided on the abutting surface and the notched surface of the pair of magnetic cores in FIG. The settings of the angles α and β in this case are the same as before.

【００１９】さらにこれ以外の実施例として、図３又は
図４（ｂ）において、金属磁性膜を一対の磁気コアの片
側のみ、また磁気コアの突合せ平坦部のみに限定して形
成しても本発明と同様の効果がある。またこれらの実施
例において、磁気コアとして磁性フェライトの代わりに
一部又は全部を非磁性セラミクスで置き換えることもで
きる。Further, as another embodiment, in FIG. 3 or FIG. 4B, the metal magnetic film may be formed only on one side of the pair of magnetic cores or only on the butt flat portions of the magnetic cores. It has the same effect as the invention. Further, in these embodiments, part or all of the magnetic core may be replaced with non-magnetic ceramics instead of magnetic ferrite.

【００２０】次に図５は本発明の磁気ヘッドの第４の実
施例を示すものである。（ａ）はその斜視図で摺動面部
分に斜めに切り込み１５，１５’を入れたものである。
（ｂ）は摺動面から見た図で、切り込み１５，１５’に
より走行軸８Ａ−８Ｂに対し稜線６，６’を角度βだけ
傾斜させ、かつ摺動部から遠ざかった非摺動部の稜線６
０，６０’を走行軸と平行にした。（ｃ）はこのような
磁気ヘッド１０の取付け状態を示す。稜線６０，６０’
及び磁気ヘッドの貼り付け面１６は走行軸に平行なの
で、従来の平坦なヘッドベース２２をそのまま使用でき
る。これより回転ドラム２０の走行方向２１に対し稜線
角βが得られる。Next, FIG. 5 shows a fourth embodiment of the magnetic head of the present invention. (A) is a perspective view of the sliding surface portion with diagonal cuts 15 and 15 '.
(B) is a view seen from the sliding surface. The ridge lines 6 and 6 ′ are inclined by the angle β with respect to the traveling shafts 8A and 8B by the cuts 15 and 15 ′, and the non-sliding portion is separated from the sliding portion. Ridge line 6
0,60 'was made parallel to the running axis. (C) shows such a mounted state of the magnetic head 10. Ridge 60, 60 '
Also, since the attaching surface 16 of the magnetic head is parallel to the traveling axis, the conventional flat head base 22 can be used as it is. As a result, the ridge line angle β is obtained with respect to the traveling direction 21 of the rotary drum 20.

【００２１】なお本発明の磁気ヘッドは、上記述べたＶ
ＴＲだけでなく接触摺動形磁気ディスク用磁気ヘッドと
しても同様に適用できる。The magnetic head of the present invention has the above-mentioned V
Not only TR but also a magnetic head for a contact sliding type magnetic disk can be similarly applied.

【００２２】[0022]

【発明の効果】本発明によれば、アジマス角の大きな磁
気ヘッドにおいて、トラック幅規制用切欠き部を対称に
形成し、かつ摺動面稜線の方向を走行軸から傾斜させた
ので、従来困難であったテープ当接特性の改善と製造の
容易さとを両立させる磁気ヘッドを提供することができ
る。According to the present invention, in the magnetic head having a large azimuth angle, the track width regulating notch is formed symmetrically and the direction of the sliding surface ridge line is inclined from the running axis, which is difficult to achieve in the prior art. It is possible to provide a magnetic head that achieves both improved tape contact characteristics and ease of manufacture.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明による磁気ヘッドの第１の実施例を示す
斜視図、摺動面図及びドラムへの取り付け状態を示す図
である。FIG. 1 is a perspective view showing a first embodiment of a magnetic head according to the present invention, a sliding surface view, and a view showing a mounting state on a drum.

【図２】第１の実施例の磁気ヘッドの動作説明図であ
る。FIG. 2 is an operation explanatory diagram of the magnetic head of the first embodiment.

【図３】本発明による磁気ヘッドの第２の実施例を示す
摺動面図である。FIG. 3 is a sliding surface view showing a second embodiment of the magnetic head according to the present invention.

【図４】本発明による磁気ヘッドの第３の実施例を示す
摺動面図である。FIG. 4 is a sliding surface view showing a third embodiment of the magnetic head according to the present invention.

【図５】本発明による磁気ヘッドの第４の実施例を示す
斜視図、摺動面図及びドラムへの取り付け状態を示す図
である。5A and 5B are a perspective view showing a magnetic head according to a fourth embodiment of the present invention, a sliding surface view, and a view showing a mounting state on a drum.

【図６】従来の磁気ヘッドの一例を示す摺動面図であ
る。FIG. 6 is a sliding surface view showing an example of a conventional magnetic head.

【符号の説明】[Explanation of symbols]

１ａ，１ｂ…磁気コア、２…作動ギャップ、２Ａ’−２
Ｂ’…作動ギャップ面に立てた垂線、３，３ａ，３ｂ，
３ａ’，３ｂ’…切欠き部、６，６’…摺動方向稜線、
８Ａ−８Ｂ…走行軸、１１，１１ａ，１１ｂ，１１
ａ’，１１ｂ’…金属磁性膜、１６…後部貼り付け面、
α…アジマス角、β…稜線角。1a, 1b ... magnetic core, 2 ... operating gap, 2A'-2
B '... Vertical lines standing on the working gap surface, 3, 3a, 3b,
3a ', 3b' ... notch, 6, 6 '... sliding direction ridge,
8A-8B ... traveling axis, 11, 11a, 11b, 11
a ', 11b' ... Metal magnetic film, 16 ... Rear attachment surface,
α: azimuth angle, β: ridge angle.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】アジマス角αを付与した作動ギャップを介
し、平坦部の幅が両側に設けた切欠き部により狭まるご
とき一対の磁気コアを突き合わせた磁気ヘッドにおい
て、該切欠き部は該作動ギャップ面に立てた垂線に関し
対称なる形状とし、媒体に当接する摺動面の摺動方向稜
線を媒体・ヘッド走行軸に対しアジマス角付与方向と反
対方向に角度βだけ傾斜させたことを特徴とする磁気ヘ
ッド。1. A magnetic head in which a pair of magnetic cores are butted such that the width of a flat portion is narrowed by notches provided on both sides via an operating gap provided with an azimuth angle α, and the notch is provided with the operating gap. It is characterized in that it has a symmetrical shape with respect to the perpendicular line standing on the surface, and that the sliding direction ridge of the sliding surface that abuts the medium is inclined by an angle β in the direction opposite to the azimuth angle application direction with respect to the medium / head traveling axis. Magnetic head. 【請求項２】摺動面の摺動方向稜線の角度βをアジマス
角αに等しく設定したことを特徴とする請求項１記載の
磁気ヘッド。2. The magnetic head according to claim 1, wherein the angle β of the sliding direction ridgeline of the sliding surface is set equal to the azimuth angle α. 【請求項３】一対の磁気コアの少なくとも一方におい
て、少なくとも該作動ギャップに対向する部分が金属磁
性膜からなることを特徴とする請求項１又は請求項２記
載の磁気ヘッド。3. A magnetic head according to claim 1, wherein at least one of the pair of magnetic cores is formed of a metal magnetic film at least in a portion facing the working gap. 【請求項４】請求項１ないし３のいずれか１項に記載の
磁気ヘッドにおいて、後部貼り付け面を媒体・ヘッド走
行軸に平行としたことを特徴とする磁気ヘッド。4. The magnetic head according to claim 1, wherein the rear attachment surface is parallel to the medium / head traveling axis.