JPS6226607A - Magnetic head and its manufacture - Google Patents

Magnetic head and its manufacture

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Publication number
JPS6226607A
JPS6226607A JP16506785A JP16506785A JPS6226607A JP S6226607 A JPS6226607 A JP S6226607A JP 16506785 A JP16506785 A JP 16506785A JP 16506785 A JP16506785 A JP 16506785A JP S6226607 A JPS6226607 A JP S6226607A
Authority
JP
Japan
Prior art keywords
core
magnetic
magnetic material
core part
magnetic head
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
Application number
JP16506785A
Other languages
Japanese (ja)
Inventor
Norifumi Watanabe
渡辺 論史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP16506785A priority Critical patent/JPS6226607A/en
Publication of JPS6226607A publication Critical patent/JPS6226607A/en
Pending legal-status Critical Current

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  • Magnetic Heads (AREA)

Abstract

PURPOSE:To execute the magnetic recording to the high-reluctance force magnetic tape without fail by burying the core part composed of the metallic magnetic substance through the nonmagnetic material at the edge surface contacting slidable to the magnetic tape of the core main body composed of the oxide type magnetic substance and providing the gap part at the core part. CONSTITUTION:At a curved sliding surface 1A side to slide with the magnetic tape of a core main body 1, a core part 6 composed of the metallic magnetic material is buried and a nonmagnetic layer 7 is laid between the core part 6 and core main bodies 2A and 2B. By the prescribed azimuth angle, a gap part 8 is provided at the center of the core part 6. Thus, when the core part 6 composed of the metallic magnetic material is provided at the core main body 1 composed of the ferrite, the saturated magnetic flux density of the core part 6 is large, and therefore, even when the large recording electric current is supplied to a winding 12, the magnetic flux of the core part 6 will not be saturated. Thus, even in case of the high-reluctant force magnetic tape, the magnetic recording can be executed without fail.

Description

【発明の詳細な説明】 (産業上の利用性gf) 本発明は、磁気ヘッド及びその製造方法に関する。[Detailed description of the invention] (Industrial applicability gf) The present invention relates to a magnetic head and a method of manufacturing the same.

(従来の技術とその問題点) ビデオテープレコーダ(以下、VTRと称す)の記録媒
体として、最近では耐外部磁界に優れている高抗磁力の
磁気テープが用いられている。
(Prior Art and its Problems) Recently, magnetic tapes with high coercive force and excellent resistance to external magnetic fields have been used as recording media for video tape recorders (hereinafter referred to as VTRs).

ところで、VTRの磁気ヘッドはフェライトの如き酸化
物系磁性材から成るコアより構成されているが、当該コ
アの飽和磁束密度は約4000〜5000ガウスと比較
的小さい。このため、高抗磁力の磁気テープを磁化すべ
く磁気ヘッドに大きな記録電流を供給すると、磁気テー
プtS化する前にコアの磁束が飽和し、磁気テープへの
記録が不完全になってしまう虞れがある。
Incidentally, the magnetic head of a VTR is composed of a core made of an oxide-based magnetic material such as ferrite, but the saturation magnetic flux density of the core is relatively small at about 4,000 to 5,000 Gauss. Therefore, if a large recording current is supplied to the magnetic head in order to magnetize a magnetic tape with high coercive force, the magnetic flux in the core may become saturated before the magnetic tape becomes tS, leading to incomplete recording on the magnetic tape. There is.

そこで、最近では磁気ヘッドのコアを飽和磁束密度の大
きい金属磁性材より形成するこ”とが提案されている。
Therefore, it has recently been proposed to form the core of the magnetic head from a metallic magnetic material with a high saturation magnetic flux density.

しかし、コアを金属磁性材より形成すると、ち該コアの
固有抵抗が小さくなってしまうため、ビデオ帯域、即ち
、高周波信号帯域での透磁率が低下してしまう。また、
金属磁性材より成るコアは耐摩耗性の点でも劣るという
欠点を有している。
However, when the core is made of a metallic magnetic material, the specific resistance of the core becomes small, resulting in a decrease in magnetic permeability in the video band, that is, the high frequency signal band. Also,
A core made of a magnetic metal material also has the disadvantage of poor wear resistance.

(問題点を解決するための手段) 本発明は、このような問題点を解決するためになされた
ものであり、酸化物系磁性体から成るコア本体の磁気テ
ープに摺接される端面側に金属磁性体から成るコア部を
非磁性材を介して埋設し、該コア部にギャップ部を設け
た磁気ヘッド及びその製造方法を提供することを目的と
する。
(Means for Solving the Problems) The present invention has been made to solve the above problems, and includes a core body made of an oxide-based magnetic material on the end surface side that is in sliding contact with the magnetic tape. It is an object of the present invention to provide a magnetic head in which a core made of a magnetic metal material is embedded through a non-magnetic material and a gap is provided in the core, and a method for manufacturing the same.

(発明の実施例) 以r、本発明の実施例を図面を参照して詳細に説明する
(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

第1図は本発明に係る磁気ヘッドを示す。この磁気ヘッ
ドはフェライト製のコア本体lを備えている。コア本体
1はコア半体2A、2Bより成り、コア半体2A、2B
の対向する端面には接合溝3.3が設けられている。そ
して、コア半体2A、2Bは接合溝3.3に充填された
ガラス材4及びその対向する端面間に位置するガラス層
5を介して接合されている。コア本体1の磁気テープと
(合接する湾曲した摺接面LA側には金属磁性材より成
るコア部6が埋設されている。このコア部6とコア半体
2A、2Bとの間には非磁性層7が介在している。コア
部6の中央には所定のアジマス角でギャップ部8が設け
られている。このギャップ部8は略半円錐形の規制凹部
9.9により図示しない磁気テープのトラック幅に対応
した長さ寸法に設定されている。これら規制凹部9.9
はコア部6とコア半体2A、2Bとに跨って設けられ、
ガラス材10が充填されている。
FIG. 1 shows a magnetic head according to the present invention. This magnetic head includes a core body l made of ferrite. The core body 1 consists of core halves 2A and 2B.
A joining groove 3.3 is provided on the opposite end face of the. The core halves 2A and 2B are joined via a glass material 4 filled in the joining groove 3.3 and a glass layer 5 located between the opposing end surfaces. A core part 6 made of a metal magnetic material is embedded in the curved sliding contact surface LA side of the core body 1 that joins with the magnetic tape. A magnetic layer 7 is interposed therebetween.A gap portion 8 is provided in the center of the core portion 6 at a predetermined azimuth angle.This gap portion 8 is formed by a substantially semi-conical regulating recess 9.9 to prevent a magnetic tape (not shown) from being formed. The length dimension is set to correspond to the track width of these regulating recesses 9.9.
is provided across the core portion 6 and the core halves 2A, 2B,
A glass material 10 is filled.

尚、一方のコア半体2Aには巻線窓11が形成されてお
り、コア半体2A、2Bにはこの巻線窓11を介して巻
線12が巻き付けられている。
A winding window 11 is formed in one of the core halves 2A, and a winding 12 is wound around the core halves 2A and 2B through the winding window 11.

このように、フェライトより成るコア本体1に金属磁性
材より成るコア部6を設けると、当該コア部6の飽和磁
束密度が大きいことから、巻線12に大きな記録電流を
供給してもコア部6の磁束が飽和することがない、従っ
て、高抗磁力の磁気テープであっても確実に磁気記録を
行うことができる。またフェライト製のコア本体1は大
きな透/a率を有しているので、ビデオ信号であっても
効率的に再生することができる。更に、フェライト製の
コア本体1の磁気テープとの摺接面LAの一部にコア部
6を設けるだけなので、磁気ヘッドの#摩耗性も保持す
ることができる。
In this way, when the core body 1 made of ferrite is provided with the core part 6 made of a metal magnetic material, the saturation magnetic flux density of the core part 6 is large, so even if a large recording current is supplied to the winding 12, the core part 6 Therefore, magnetic recording can be performed reliably even on a magnetic tape with high coercive force. Furthermore, since the core body 1 made of ferrite has a high transmittance/a ratio, even video signals can be efficiently reproduced. Furthermore, since the core portion 6 is only provided on a part of the sliding surface LA of the ferrite core body 1 with the magnetic tape, the abrasion resistance of the magnetic head can also be maintained.

次に、本発明に係る製造方法を説明する。Next, a manufacturing method according to the present invention will be explained.

即ち、第2[Δ(a)に示すように、直方体のフェライ
ト材2A’、2B’を用危し、これらのフェライト材に
段部20を設ける。
That is, as shown in the second Δ(a), rectangular parallelepiped ferrite materials 2A' and 2B' are used, and a stepped portion 20 is provided on these ferrite materials.

一方、同図(b)に示すように、段部20に嵌着するた
めの金属磁性材6′を用意する。そして、この金属磁性
材6′の隣接する二面を鏡面仕とげし、これら二面に高
融点の非磁性膜1例えば、5iOzやAl2O2等から
成る非磁性膜7Aをスパッタリングにより約0.1〜0
.2gmの厚さで設ける。
On the other hand, as shown in FIG. 2B, a metal magnetic material 6' to be fitted onto the stepped portion 20 is prepared. Then, two adjacent surfaces of this metal magnetic material 6' are polished to a mirror finish, and a high melting point nonmagnetic film 1, for example, a nonmagnetic film 7A made of 5iOz, Al2O2, etc., is sputtered on these two surfaces to a thickness of about 0.1 to 0
.. Provided with a thickness of 2 gm.

次に、フェライト材2A’ (2B’)の段部20に、
同図(C)に示すように、高融点かつフェライトと略同
一の熱膨張係数を有するガラス層7Bをスパッタリング
(又は塗布)にて約IILmの厚さで設ける。そして、
この段部20に、同図(d)に示すように、非磁性膜7
Aをガラス層7Bに接触させた状態で金属磁性材6′を
嵌合し。
Next, on the step part 20 of the ferrite material 2A'(2B'),
As shown in FIG. 3C, a glass layer 7B having a high melting point and approximately the same coefficient of thermal expansion as ferrite is provided by sputtering (or coating) to a thickness of about IILm. and,
As shown in FIG. 2(d), a nonmagnetic film 7
The metal magnetic material 6' is fitted with A in contact with the glass layer 7B.

約750°Cに加熱しつつ金属磁性材6′を段部20に
押し付け、該段部20に非磁性膜7A及びカラス層7B
を介して固着する。これによりコア半体ブロック21.
22が得られる。
The metal magnetic material 6' is pressed onto the stepped portion 20 while being heated to approximately 750° C., and the non-magnetic film 7A and the glass layer 7B are applied to the stepped portion 20.
It is fixed through. As a result, the core half block 21.
22 is obtained.

次いで、同図(e)に示すように、コア半体ブロック2
1(22)の接合面21a(22a)に、金属磁性材6
′とフェライト材2A′ (2B′)とに跨る半円錐状
の規制凹部9a〜9dを形成する。規制凹部9a、9b
及び9C19dの金属磁性材6′での間隔tは磁気テー
プのトラック幅に対応した長さ寸法を有している。また
、一方のコア半体ブロック21の接合面21aに、同図
(f)に示すように、接合溝3及び巻線窓11を形成す
ると共に、他方のコア半体ブロック22の接合面22a
に接合溝3のみを形成する。そして、各コア半体ブロッ
ク21.22の接合溝3.3と規制凹部9a〜9dとに
、低融点(約450’C)かつフェライトと略同一の熱
膨張係数を有するガラス材4′及び10′をそれぞれ充
填する。
Next, as shown in the same figure (e), the core half block 2
The metal magnetic material 6 is attached to the joint surface 21a (22a) of 1 (22).
Semi-conical regulating recesses 9a to 9d are formed spanning the ferrite material 2A'(2B') and the ferrite material 2A'(2B'). Regulation recesses 9a, 9b
The distance t between the metal magnetic material 6' and 9C19d has a length dimension corresponding to the track width of the magnetic tape. In addition, as shown in FIG. 3(f), a joint groove 3 and a winding window 11 are formed on the joint surface 21a of one core half block 21, and a joint surface 22a of the other core half block 22 is formed.
Only the bonding groove 3 is formed in. Glass materials 4' and 10 having a low melting point (approximately 450'C) and approximately the same coefficient of thermal expansion as ferrite are provided in the joint grooves 3.3 and regulating recesses 9a to 9d of each core half block 21.22. ′ respectively.

このようにガラス材4′、10′を充填した後は、コア
半体ブロック21,22を鏡面仕上げし、同図(g)に
示すように、フェライト材2A′ (2B’>に低融点
のカラス層5′をスパッタリングにより形成すると共に
、金属磁性材6′に石英ガラスより成るギャップ層8′
をスパッタリングにより形成する。このギャップ層8′
は所望するギャップ幅の1/2の厚さに形成されている
After filling the glass materials 4' and 10' in this manner, the core half blocks 21 and 22 are mirror-finished, and as shown in FIG. A glass layer 5' is formed by sputtering, and a gap layer 8' made of quartz glass is formed on a metal magnetic material 6'.
is formed by sputtering. This gap layer 8'
is formed to have a thickness 1/2 of the desired gap width.

次いで、同図(h)に示すように、コア半体ブロック2
1.22の接合面21a、22a、即ち、ガラス層5′
、5′を突き合わせると共に、巻線窓11に低融点かつ
フェライトと略同一の熱膨張係数を有するガラスt42
3を挿入する。そして、これらのコア半体ブロック21
.22を約450°Cで加熱し、相互に押し付けること
により接合溝3に充填した低融点ガラス材4′、規制凹
部9a〜9dに充填した低融点ガラス材10′、低融点
ガラス層5′及び上記ガラス棒23を介してコア半体ブ
ロック21.22を接合する。これにより、同図(i)
に示す複合ブロック24が得られる。
Next, as shown in the same figure (h), the core half block 2
1.22 joint surfaces 21a, 22a, that is, glass layer 5'
, 5' are butted against each other, and a glass t42 having a low melting point and approximately the same coefficient of thermal expansion as ferrite is placed in the winding window 11.
Insert 3. And these core half blocks 21
.. 22 at about 450° C. and pressed against each other, the low melting point glass material 4' filled in the bonding groove 3, the low melting point glass material 10' filled in the regulating recesses 9a to 9d, the low melting point glass layer 5' and The core half blocks 21, 22 are joined via the glass rod 23 mentioned above. As a result, (i)
A composite block 24 shown in is obtained.

次に、同図(i)の点線で示すように、複合ブロック2
4を所定のアジマス角θで切断し、同図(j)に示す一
対のヘッド素体25.25を作製する。
Next, as shown by the dotted line in Figure (i), the composite block 2
4 at a predetermined azimuth angle θ to produce a pair of head bodies 25 and 25 shown in FIG.

最後に、同図(Dに示すように、金属磁性材6′の位置
するフェライト材2A’、2B’の端面を研磨し、かつ
巻線窓11を介して巻線12を巻き付け、これによりギ
ヤ、ンプ深さ文が所定寸法になり、かつ湾曲した摺接面
LAを有する本発明の磁気ヘッド(第1図参照)が得ら
れる。
Finally, as shown in FIG. , a magnetic head of the present invention (see FIG. 1) is obtained which has a predetermined pump depth and a curved sliding contact surface LA.

以上説明したように、コア半体ブロック21゜22を低
融点のガラス材を介して低温度(約450’0)にて接
合すると、フェライト材2A’(2BNの段部20に金
属磁性材6′を固着するための高融点の非磁性膜7A及
びガラス層7Bがブロック21.22の接合時に溶融す
るのを防止することができる。従って、コア部6がコア
本体1に完全に固着されている磁気ヘッドを得ることが
できる。また、E記ガラス層7B及び低融点の接合用ガ
ラス材としてフェライト材2A’、2B’と同一の熱膨
張係数を有するものを用いているので、温度変化によっ
てコア本体lとコア部6及びフェライト材2A’、2B
′相互の接合状態が不完全になるのを防止することもで
きる。従って、磁気ヘッドの耐温度特性も著しく向上す
る。
As explained above, when the core half blocks 21 and 22 are joined at a low temperature (approximately 450'0) through a glass material with a low melting point, the metal magnetic material 6 is attached to the stepped portion 20 of the ferrite material 2A' (2BN It is possible to prevent the high melting point non-magnetic film 7A and the glass layer 7B for fixing the blocks 21 and 22 from melting when the blocks 21 and 22 are bonded.Therefore, the core part 6 is completely fixed to the core body 1. In addition, since the E glass layer 7B and the low melting point bonding glass material have the same coefficient of thermal expansion as the ferrite materials 2A' and 2B', Core body l, core part 6, and ferrite materials 2A', 2B
'It is also possible to prevent the mutual bonding state from becoming incomplete. Therefore, the temperature resistance characteristics of the magnetic head are also significantly improved.

(発明の効果) 本発明によれば、酸化物系磁性体から成るコア本体の磁
気テープに摺接される端面側に金属磁性体から成るコア
部を非磁性を介して埋設し、該コア部にギャップ部を設
けたので、高抗磁力の磁気テープに確実に磁気記録を行
い、しかもビデオ信号を効率的に再生できる耐摩耗性の
優れた磁気ヘッドを提供することができる。また、コア
部をコア本体に高融点でかつコア本体の熱膨張係数と同
一の非磁性材を介して固着し、コア本体を形成するコア
半部相互を低融点の非磁性材にて接合するので、接続状
態の優れた信頼性を有する磁気ヘッドが得られる。
(Effects of the Invention) According to the present invention, a core portion made of a metal magnetic material is embedded via a nonmagnetic material on the end surface side of the core body made of an oxide-based magnetic material that comes into sliding contact with a magnetic tape, and the core portion Since the gap portion is provided in the head, it is possible to provide a magnetic head with excellent wear resistance that can reliably perform magnetic recording on a magnetic tape with high coercive force and can efficiently reproduce video signals. In addition, the core part is fixed to the core body through a non-magnetic material with a high melting point and the same coefficient of thermal expansion as the core body, and the core halves forming the core body are joined together with a low-melting point non-magnetic material. Therefore, a magnetic head with excellent connection reliability can be obtained.

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

第1図は本発明に係る磁ヌヘ・)・ドの斜視図、第2図
(a)乃至(j)は本発明の製造方法の各製造工程を説
明するための図である。 1・・・コア本体。 4・・・ガラス材、 5・・・ガラス層、 6・・・コア部、 6′・・・金属磁性材、 7A・・・磁性膜、 7B・・・ガラス層、 8・・・ギャップ部、 20・・・段部、 21.22・・・コア半体ブロック。 第1囚 2B 第2vA
FIG. 1 is a perspective view of a magnetic tube according to the present invention, and FIGS. 2(a) to (j) are diagrams for explaining each manufacturing process of the manufacturing method of the present invention. 1... Core body. 4...Glass material, 5...Glass layer, 6...Core part, 6'...Metal magnetic material, 7A...Magnetic film, 7B...Glass layer, 8...Gap part , 20... Step part, 21.22... Core half block. 1st prisoner 2B 2nd vA

Claims (1)

【特許請求の範囲】 1、酸化物系磁性体から成るコア本体と、該コア本体の
一端側に設けられるギャップ部とを備える磁気ヘッドで
あって、前記コア本体の一端側に金属磁性体から成るコ
ア部が非磁性材を介して埋設され、該コア部に前記ギャ
ップ部が位置していることを特徴とする磁気ヘッド。 2、コア半体を形成するための酸化物系磁性材に段部を
設ける工程と、前記段部に金属磁性材を高融点でかつ前
記酸化物系磁性材と略同一の熱膨張係数を有する非磁性
層を介して固着してコア半体ブロックを形成する工程と
、一対の前記コア半体ブロックの前記金属磁性材を有す
る各接合面を突き合わせ、低融点非磁性材を介して接合
する工程とを含むことを特徴とする磁気ヘッドの製造方
法。 3、該酸化物系磁性材はフェライトであることを特徴と
する特許請求の範囲第2項に記載の磁気ヘッドの製造方
法。
[Claims] 1. A magnetic head comprising a core body made of an oxide-based magnetic material and a gap portion provided at one end side of the core body, the magnetic head comprising a core body made of a metal magnetic material at one end side of the core body. 1. A magnetic head, characterized in that a core portion made of the same material is embedded through a non-magnetic material, and the gap portion is located in the core portion. 2. Providing a stepped portion in the oxide-based magnetic material for forming the core half, and forming a metal magnetic material in the stepped portion with a high melting point and approximately the same coefficient of thermal expansion as the oxide-based magnetic material. a step of fixing via a non-magnetic layer to form a core half block, and a step of butting each bonding surface of the pair of core half blocks having the metal magnetic material and joining via a low melting point non-magnetic material. A method of manufacturing a magnetic head, comprising: 3. The method of manufacturing a magnetic head according to claim 2, wherein the oxide-based magnetic material is ferrite.
JP16506785A 1985-07-26 1985-07-26 Magnetic head and its manufacture Pending JPS6226607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16506785A JPS6226607A (en) 1985-07-26 1985-07-26 Magnetic head and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16506785A JPS6226607A (en) 1985-07-26 1985-07-26 Magnetic head and its manufacture

Publications (1)

Publication Number Publication Date
JPS6226607A true JPS6226607A (en) 1987-02-04

Family

ID=15805238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16506785A Pending JPS6226607A (en) 1985-07-26 1985-07-26 Magnetic head and its manufacture

Country Status (1)

Country Link
JP (1) JPS6226607A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0558044U (en) * 1992-05-15 1993-08-03 株式会社丸伸 Clothes hanging rotation device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577024A (en) * 1978-12-01 1980-06-10 Fujitsu Ltd Magnetic head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577024A (en) * 1978-12-01 1980-06-10 Fujitsu Ltd Magnetic head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0558044U (en) * 1992-05-15 1993-08-03 株式会社丸伸 Clothes hanging rotation device

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