JPS6346886Y2 - - Google Patents

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Publication number
JPS6346886Y2
JPS6346886Y2 JP11706879U JP11706879U JPS6346886Y2 JP S6346886 Y2 JPS6346886 Y2 JP S6346886Y2 JP 11706879 U JP11706879 U JP 11706879U JP 11706879 U JP11706879 U JP 11706879U JP S6346886 Y2 JPS6346886 Y2 JP S6346886Y2
Authority
JP
Japan
Prior art keywords
gap
silver solder
core
front gap
hole
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
Application number
JP11706879U
Other languages
Japanese (ja)
Other versions
JPS5635120U (en
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 filed Critical
Priority to JP11706879U priority Critical patent/JPS6346886Y2/ja
Publication of JPS5635120U publication Critical patent/JPS5635120U/ja
Application granted granted Critical
Publication of JPS6346886Y2 publication Critical patent/JPS6346886Y2/ja
Expired legal-status Critical Current

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  • Magnetic Heads (AREA)

Description

【考案の詳細な説明】 本考案はセンダスト等の金属磁性材料を用いた
磁気ヘツドの構造に関するものである。
[Detailed Description of the Invention] The present invention relates to the structure of a magnetic head using a metal magnetic material such as sendust.

近年、磁気記録の高密度化のため従来のフエラ
イトより飽和磁束密度の高いセンダスト等金属磁
性材料を用いた磁気記録再生ヘツドの開発がいそ
がれている。一般にヘツドの製造法としては厚み
方向に長い2つのコアブロツクをフロント及びリ
ヤギヤツプ部を区分する巻線孔がブロツク内部に
形成されるように衝合、接合せしめ、その後厚み
方向にスライス切断し成形する方法が採用されて
いる。フエライト系材料においては接合に用いる
溶着材としてガラス材が有効で材料自身の機械的
な強度も強いため上述の方法は有効であるが、ガ
ラス材は金属磁性材料、特にセンダスト系の材料
に対しては濡れ性等の馴染みが悪いためコア間に
あまり浸透せずしかも両者間の接合力も弱く溶着
材としては適していない。このため、金属磁性材
料においては銀ロウ等のロウ材以外に有効な溶着
材は末だ知られておらず第1図のように2つのコ
アブロツク1,2のリヤギヤツプ部に設けた溝3
にロウ材4を挿入し加熱溶着する方法が採用され
ている。しかしながらセンダスト等の金属磁性材
料では機械的なねばりが強いため、製造工程にお
いてコアをスライス切断する際や、実際のテープ
摺動時にフロントギヤツプ形成面が塑性変形して
ギヤツプ長が広がり易い傾向があつた。特に
VTR等のビデオ用ヘツドのように数10ミクロン
のトラツク巾のヘツドの場合この問題は切実でフ
ロントギヤツプ近傍にも接合部を設けることが要
求されている。一般にフロントギヤツプにはその
ギヤツプ長を規定するためにSiO2等の蒸着膜が
形成されているがそれには接合性はない。このた
め第2図のように巻線孔5の周囲にロウ材6を充
填せしめ巻線孔の周囲でも接合する構造が提案さ
れている。しかしながらこの方法は巻線孔のフロ
ントギヤツプ側からギヤツプ界面にロウ材の拡散
層がにじみ出し実効的なギヤツプ長を広げたりあ
るいは極端な場合ギヤツプ近傍の界面に析出物が
現れたり空孔が形成されるといつた問題があつ
た。この拡散層の大きさは製造工程の管理である
程度軽減されるが表面拡散、粒界拡散を含めると
数100ミクロンから数ミクロン広がることが確認
されておりギヤツプ長(1ミクロン以下)から考
えてもヘツドの特性に大きな影響を及ぼしてい
る。
In recent years, in order to increase the density of magnetic recording, efforts have been made to develop magnetic recording/reproducing heads using metallic magnetic materials such as sendust, which has a higher saturation magnetic flux density than conventional ferrite. Generally, the manufacturing method for heads is to abut and join two core blocks that are long in the thickness direction so that the winding holes that separate the front and rear goat parts are formed inside the blocks, and then slice them in the thickness direction and form them. has been adopted. For ferrite-based materials, glass is effective as a welding material for joining, and the material itself has strong mechanical strength, so the above method is effective, but glass is not suitable for metallic magnetic materials, especially sendust-based materials. is not suitable as a welding material because it does not penetrate well between the cores and the bonding force between them is weak because of poor wettability and compatibility. For this reason, there are no known welding materials other than brazing materials such as silver solder that are effective for metal magnetic materials, and as shown in FIG.
A method is adopted in which a brazing material 4 is inserted and heated and welded. However, because metal magnetic materials such as sendust have strong mechanical tenacity, the front gap forming surface tends to be plastically deformed and the gap length tends to widen when the core is sliced during the manufacturing process or when the tape is actually slid. . especially
In the case of a head with a track width of several tens of microns, such as a video head for a VTR, this problem is acute, and it is required to provide a joint near the front gear. Generally, a deposited film of SiO 2 or the like is formed on the front gap to define the gap length, but it does not have bonding properties. For this reason, a structure has been proposed in which the periphery of the winding hole 5 is filled with brazing material 6 and the periphery of the winding hole is also bonded. However, with this method, a diffused layer of brazing material may ooze out from the front gap side of the winding hole to the gap interface, increasing the effective gap length, or in extreme cases, precipitates may appear at the interface near the gap or voids may be formed. I had a problem. The size of this diffusion layer can be reduced to some extent by controlling the manufacturing process, but if surface diffusion and grain boundary diffusion are included, it has been confirmed that it expands from several hundred microns to several microns, even considering the gap length (1 micron or less). This has a great influence on the characteristics of the head.

本考案は巻線孔での接合手段を工夫することに
よつて上述の問題点を改善せしめる構造を提供す
るもので以下図面に従つて説明する。第3図は本
考案の一実施例を示したものである。図において
10,11は金属性材料(たとえばセンダスト)
よりなるコア半体で、各コア半体はその合体によ
り巻線孔12及び溶着材充填孔13を備えるよう
にその衝合面が成形されている。そして巻線孔側
面のフロントギヤツプ14下端からの一定の領域
lを除く部分にはリン青銅、ベリリウム銅等非磁
性材で作られたガイド15に付着された銀ロウ1
6を備え、それにより各コア半体の接合強度を補
強するようにしている。この第3図の部分17を
拡大して示した第4図において、領域18は銀ロ
ウ16の溶着時やその後の熱処理によつて生ずる
拡散層を示している。銀ロウ16が付着されたガ
イド15は少なくとも熱処理前には弾性を有し、
これを巻線孔12に装着したときその位置を規定
することができるようになつている。そしてフロ
ントギヤツプ14を上側にして衝合したコア半体
を加圧、加熱したときに流動可能な銀ロウがコア
側面とガイド間に充填され、それ以外の例えばフ
ロントギヤツプ14側の近傍の一定の領域lに流
入しないように規制している。一方充填孔13に
は従来通りの溶着材19が装着され、それにより
各コア半体の主たる接合を行つている。
The present invention provides a structure that improves the above-mentioned problems by devising the joining means in the winding holes, and will be explained below with reference to the drawings. FIG. 3 shows an embodiment of the present invention. In the figure, 10 and 11 are metallic materials (for example, sendust)
The abutting surfaces of each core half are formed so as to provide a winding hole 12 and a welding material filling hole 13 when the core halves are combined. Silver solder 1 is attached to a guide 15 made of a non-magnetic material such as phosphor bronze or beryllium copper on the side surface of the winding hole except for a certain area l from the lower end of the front gap 14.
6, thereby reinforcing the joint strength of each core half. In FIG. 4, which is an enlarged view of the portion 17 in FIG. 3, a region 18 shows a diffusion layer formed during welding of the silver solder 16 and subsequent heat treatment. The guide 15 to which the silver solder 16 is attached has elasticity at least before heat treatment,
When this is installed in the winding hole 12, its position can be defined. Then, when the core halves abutted with the front gap 14 facing upward are pressurized and heated, silver solder that can flow is filled between the core side surface and the guide, and other than that, for example, in a certain area near the front gap 14 side. It is regulated to prevent it from flowing into the country. On the other hand, a conventional welding material 19 is installed in the filling hole 13, thereby performing the main joining of each core half.

第5図は本考案の他の実施例の第4図に相当す
るものである。図示の如くこの実施例の結合部材
20は巻線孔12に内接するように外周部に銀ロ
ウ21を被着した断面が円環状のガイド22によ
り構成したものである。このガイドの素材をリン
青銅とした場合、図示の溶着後の状態ではそのバ
ネ性を完全に除去されているが、巻線孔12への
挿入の際は孔側面に圧着するようにバネ性が付与
されている。
FIG. 5 corresponds to FIG. 4 of another embodiment of the present invention. As shown in the figure, the coupling member 20 of this embodiment is constituted by a guide 22 having an annular cross section and having a silver solder 21 coated on the outer periphery so as to be inscribed in the winding hole 12. If the material of this guide is phosphor bronze, its springiness is completely removed in the state after welding as shown in the figure, but when it is inserted into the winding hole 12, its springiness is pressed against the side of the hole. Granted.

以上説明したように本考案は金属磁性材料から
なる2枚のコア半体を突き合わせその突合面間に
フロントギヤツプと、該フロントギヤツプの下端
を規定しかつこの下端から更に下方に向けて末広
がりの対向面を持つ巻線孔とを備える磁気ヘツド
において、上記巻線孔を構成する側面の、上記下
端からの一定領域を超えた部分間に、これら各コ
ア半体を結合する銀ロウを設けてなるものである
ので、フロントギヤツプの実質上、下端まで、上
記銀ロウの拡散層による磁気特性の低下をきたす
ことなく磁気ヘツドとして利用できる。又、フロ
ントギヤツプの下端から一定領域超えた部分に、
磁気ヘツドを構成するコア各半体を接合する結合
部材を設けたので、従来の金属磁性材料製磁気ヘ
ツドのリヤギヤツプ部においてのみ接合していた
ものに比べフロントギヤツプ側の近傍における接
合強度を増すことができ、狭いトラツク巾に対応
すべくコア厚を小さくしてもギヤツプ長が機械的
に広がつてしまうおそれがない。またこの各コア
半体を銀ロウによつて接合するに当たり、その接
合がフロントギヤツプから一定の領域だけ離れた
位置で行われるように構成したので、拡散層がフ
ロントギヤツプ部に浸透して磁気特性を劣化させ
るおそれがない。
As explained above, the present invention abuts two core halves made of metallic magnetic materials, defines a front gear between the abutting surfaces, and defines a lower end of the front gear, and further defines an opposing surface that widens downward from the lower end. In the magnetic head having a winding hole, a silver solder is provided between the side surfaces forming the winding hole beyond a certain area from the lower end to connect each of the core halves. Therefore, substantially all the way to the bottom end of the front gap can be used as a magnetic head without degrading the magnetic properties due to the silver solder diffusion layer. Also, in the part beyond a certain area from the lower end of the front gear,
Since a connecting member is provided to join each half of the core that makes up the magnetic head, the strength of the joint near the front gear can be increased compared to the conventional magnetic head made of metal magnetic material, which is joined only at the rear goat. Therefore, even if the core thickness is reduced to accommodate a narrow track width, there is no risk of the gap length becoming mechanically widened. In addition, when these core halves were joined together using silver solder, the joining was done at a certain distance from the front gap, so the diffusion layer penetrated into the front gap and deteriorated the magnetic properties. There is no risk of causing

さらに、本考案の磁気ヘツドはコアが金属磁性
材料で構成されているので、抗磁力の大きい磁気
体を磁性層に含むいわゆるメタルテープに、テレ
ビジヨン信号等の高周波信号を稠密記録再生する
のに適用できる。
Furthermore, since the magnetic head of the present invention has a core made of a metallic magnetic material, it is suitable for densely recording and reproducing high frequency signals such as television signals on so-called metal tapes whose magnetic layer contains a magnetic material with a large coercive force. Applicable.

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

第1図及び第2図は従来の磁気ヘツドの構成図
である。第3図は本考案の磁気ヘツドの概略構成
図、第4図は第3図の部分拡大図である。第5図
は他の実施例の概略構成図である。 10,11……コア半体、12……巻線孔、1
6……接合部材、15……ガイド。
FIGS. 1 and 2 are block diagrams of a conventional magnetic head. FIG. 3 is a schematic configuration diagram of the magnetic head of the present invention, and FIG. 4 is a partially enlarged view of FIG. 3. FIG. 5 is a schematic configuration diagram of another embodiment. 10, 11... Core half, 12... Winding hole, 1
6...Joining member, 15...Guide.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 金属磁性材料からなる2枚のコア半体を突き合
わせその突合面間にフロントギヤツプと、該フロ
ントギヤツプの下端を規定しかつこの下端から更
に下方に向けて末広がりの対向面を持つ巻線孔と
を備え、前記2枚のコア半体を銀ロウにて結合す
る磁気ヘツドにおいて、前記各コア半体の前記巻
線孔を構成する側面の前記下端から離れた部分に
銀ロウを位置させるガイドを前記巻線孔内に設
け、該巻線孔内の前記下端近傍に隙間を形成して
上記フロントギヤツプに銀ロウを存在させないこ
とを特徴とする磁気ヘツド。
Two core halves made of a metallic magnetic material are brought into contact with each other, and a front gap is provided between the abutting surfaces thereof, and a winding hole is provided which defines a lower end of the front gap and has opposing surfaces that widen further downward from the lower end, In the magnetic head in which the two core halves are joined by silver solder, a guide for positioning the silver solder on a portion of the side surface forming the winding hole of each core half, away from the lower end, is provided for the winding wire. A magnetic head, characterized in that the front gap is provided in a hole, and a gap is formed near the lower end in the winding hole to prevent silver solder from being present in the front gap.
JP11706879U 1979-08-24 1979-08-24 Expired JPS6346886Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11706879U JPS6346886Y2 (en) 1979-08-24 1979-08-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11706879U JPS6346886Y2 (en) 1979-08-24 1979-08-24

Publications (2)

Publication Number Publication Date
JPS5635120U JPS5635120U (en) 1981-04-06
JPS6346886Y2 true JPS6346886Y2 (en) 1988-12-05

Family

ID=29349281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11706879U Expired JPS6346886Y2 (en) 1979-08-24 1979-08-24

Country Status (1)

Country Link
JP (1) JPS6346886Y2 (en)

Also Published As

Publication number Publication date
JPS5635120U (en) 1981-04-06

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