JPS61204816A - Magnetic head core - Google Patents

Abstract

PURPOSE:To obtain a magnetic head having uniform characteristic by making it possible that the depth of a magnetic gap is detected after the sliding surface is ground. CONSTITUTION:A gap depth l0 is obtained in accordance with equation l0=(l1-l2)/sintheta where l1 is the distance between one outside surface 1d of a magnetic head core 1 and the lower end of one butted surface 1b and l2 is the distance between the outside surface 1d after gringing and the upper end of the butted surface 1b and theta is the angle between the outside surface 1d and the butted surface 1b as shown by their extended surfaces B and A. Dimensions l1 and the angle theta are given preliminarily, and dimensions l2 after gringing of the sliding surface are measured to calculate the gap depth l0. Since the gap length l0 after grinding is detected in this manner, grinding is adjusted in accordance with the obtained gap depth to control easily the gap depth uniformly.

Description

【発明の詳細な説明】 ［技術分野］ 本発明は磁気ヘッドコアに関し、ｙらに詳しくは対のコ
ア構成部材を突き合わせてリング状に構成され、前記部
材先端の突き合わせ面間に形成した磁気ギャップを磁気
記録媒体に摺動して情報の記録、再生を行なう磁気ヘッ
ドコアに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a magnetic head core, and more particularly to a magnetic head core formed into a ring shape by abutting a pair of core constituent members, and a magnetic gap formed between the abutting surfaces of the tips of the members. The present invention relates to a magnetic head core that records and reproduces information by sliding on a magnetic recording medium.

［従来技術］ 従来のこの種の磁気ヘッドコアを用いて構成した磁気ヘ
ッドの内部構造を第１図に示す。[Prior Art] FIG. 1 shows the internal structure of a magnetic head constructed using a conventional magnetic head core of this type.

同図において符号ｌで示すものが磁気ヘッドコアで、は
ぼコの字形の対のコア半休ｊａ　、　ｌ　ａ　′を突き
合わせ、接合して、はぼ矩形のリング状に構成されてお
り、コア半体１　ａ　、　ｌ　ａ′の先端の突き合わせ
面１ｂ、ｌｂ′間に記録、再生を行なう磁気ギャップＧ
が形成されている。In the same figure, the magnetic head core is indicated by the symbol l, and is constructed by a pair of halves of the hollow-shaped core halves ja and l a ′ that are butted against each other and joined to form a hollow rectangular ring. A magnetic gap G for recording and reproducing between the abutting surfaces 1b and lb' at the tips of 1a and 1a'
is formed.

そしてこの突き合わせ面１ｂ、ｌｂ′と、磁気ギャップ
Ｇを含む磁気ヘッドコア１の不図示の磁気記録媒体に摺
動される先端面ＩＣのキャンプ幅方向に隣接した外側面
１ｄ、ｌｄ′とは同図にそれぞれの一方の延長面Ｂ面、
Ａ面で示すように平行な平面に形成され、磁気ギャップ
６部分での媒体摺動力向に対して直交する方向と平行に
形成されている。The abutting surfaces 1b, lb' and the outer surfaces 1d, ld' adjacent in the camp width direction of the tip face IC of the magnetic head core 1 including the magnetic gap G, which slides on a magnetic recording medium (not shown), are shown in the same figure. one extension surface B of each,
They are formed in parallel planes as shown by plane A, and parallel to a direction perpendicular to the direction of the medium sliding force in the magnetic gap 6 portion.

このような構造を有する磁気ヘッドコアｌは、巻線３を
巻回され接続端子５．５を植設されたポビン４を後部に
嵌合され、両側にコア保持体２．２を嵌合され、不図示
のケース内に嵌合される。　そしてケースの磁気記録媒
体に摺動される摺動面に形成された開口部に先端面１ｃ
を臨ませて磁気ヘッドコア１を固定した後、先端面１ｃ
を含む摺動面に仕上げの研削加工を行なって磁気ヘッド
が完成する。A magnetic head core l having such a structure has a pobbin 4 wound with a winding 3 and implanted with a connecting terminal 5.5 fitted at the rear thereof, and core holders 2.2 fitted on both sides. It is fitted into a case (not shown). Then, the tip end surface 1c is inserted into the opening formed in the sliding surface that slides on the magnetic recording medium of the case.
After fixing the magnetic head core 1 facing the
A final grinding process is performed on the sliding surface including the magnetic head to complete the magnetic head.

そしてこの時の研削寸法により磁気ヘッドの特性にとっ
て非常に重要である第１図に−ａＯで示すギャップデプ
ス、すなわち突き合わせ面ｌｂ、ｌｂ′の」−丁酉端間
の長さが管理されている。The grinding dimensions at this time control the gap depth shown by -aO in FIG. 1, which is very important for the characteristics of the magnetic head, that is, the length between the ends of the abutting surfaces lb and lb'.

この管理方法は上記の構造では摺動面研削後のギャップ
デプス１０がヘッドを分解しなければ測定できず、事実
上確認できないための便法である。This management method is an expedient method because in the above structure, the gap depth 10 after sliding surface grinding cannot be measured without disassembling the head, and therefore cannot be confirmed in fact.

しかしながらこのような管理方法ではコア形成時のギャ
ップデプスのバラツキ、コア組込時の組込寸法のバラツ
キ等がある場合研削後のギャップデプスにバラツキが発
生してしまう。However, with such a management method, if there are variations in the gap depth at the time of core formation, variations in the built-in dimensions when the core is assembled, etc., variations will occur in the gap depth after grinding.

［目　（白１ 本発明は以上のような事情に鑑みてなされたもので、」
−述した種類の磁気ヘッドコアにおいてギャップデプス
を高精度で管理でき、均一な特性の磁気ヘッドを構成で
きる磁気ヘッドコアを提供することを目的としている。[Eye (White 1) The present invention has been made in view of the above circumstances.
- It is an object of the present invention to provide a magnetic head core of the type described above, which can control the gap depth with high precision and constitute a magnetic head with uniform characteristics.

［発明の構成］ 上記の目的を達成するために本発明にあっては、」二連
した種類の磁気ヘッドコアにおいて、磁気ギャップを形
成する突き合わせ面を磁気ギャップ部分での磁気記録媒
体の摺動方向に直交する方向に対して傾斜した平面とし
、磁気ギャップを含む媒体摺動面のギャップ幅方向に隣
接する外側面の少なくとも一方の摺動面側の端部を前記
直交方向に平行な平面とした構造を採用した。[Structure of the Invention] In order to achieve the above-mentioned object, the present invention provides that, in a double type of magnetic head core, the abutting surfaces forming the magnetic gap are aligned in the sliding direction of the magnetic recording medium in the magnetic gap portion. A flat surface is inclined with respect to a direction perpendicular to the direction, and at least one sliding surface side end of the outer surface adjacent to the gap width direction of the medium sliding surface including the magnetic gap is a flat surface parallel to the orthogonal direction. structure was adopted.

［実施例〕 以下、本発明の実施例の詳細を第２図を参照して説明す
る。なおここでは先述した従来例と同じタイプの磁気ヘ
ッドを構成する磁気ヘッドコアを実施例としており、第
２図において第１図と同一もしくは相当する部分には同
一符号が付しである。[Example] Hereinafter, details of an example of the present invention will be described with reference to FIG. 2. Here, a magnetic head core constituting the same type of magnetic head as the conventional example described above is used as an example, and in FIG. 2, the same or corresponding parts as in FIG. 1 are given the same reference numerals.

第２図は本実施例の磁気ヘッドコアから構成される磁気
ヘッドの内部構造を示す横断平面図である。FIG. 2 is a cross-sectional plan view showing the internal structure of the magnetic head composed of the magnetic head core of this embodiment.

同図に示すように磁気ヘッドコアｌはコア半体ｌａ、ｌ
ａ′を磁気ギャップＧを介して突き合わせ、接合してリ
ング状に構成されており、磁気ギャップＧを形成するコ
ア半体１ａ、ｌａ′の先端の突き合わせ面１　ｂ　、　
１’　ｂ　”は磁気ギヤ７７０部分での媒体摺動方向に
直交する方向に対して０°より大きく９０°より小さい
角度θで傾斜した互いに平行な平面として形成されてい
る。また磁気ギャップＧを含む先端面１ｃの゛ギャップ
幅方向に隣接した両側の外側面１ｄ、ｌｄ′は先述の従
゛来例の場合と同様に上記の直交方向に平行な平面に゛
形成されている。As shown in the figure, the magnetic head core l has core halves la, l.
a' are abutted and joined through a magnetic gap G to form a ring shape, and the abutting surfaces 1 b at the tips of the core halves 1a and la' form the magnetic gap G,
1' b '' are formed as mutually parallel planes inclined at an angle θ greater than 0° and smaller than 90° with respect to the direction perpendicular to the medium sliding direction in the magnetic gear 770 portion. The outer surfaces 1d and ld' on both sides adjacent in the gap width direction of the distal end surface 1c are formed in planes parallel to the orthogonal direction as in the conventional example described above.

このような構造を有する磁気ヘッドコアｌは従来の場合
と同様にポビン４とコア保持体２，２を嵌合され、不図
示のケース内に嵌合され、ケースの摺動面の開口部に先
端面１ｃを臨ませて固定される。そして先端面１ｃを含
むケースの摺動面全体に仕上げの研削加工を行なって磁
気ヘッドが完成する。The magnetic head core l having such a structure is fitted with the pobbin 4 and the core holders 2, 2 as in the conventional case, and then fitted into a case (not shown), and the tip is inserted into the opening of the sliding surface of the case. It is fixed with the surface 1c facing. A final grinding process is then performed on the entire sliding surface of the case, including the tip end surface 1c, to complete the magnetic head.

ここで上記の構造により研削後のギャップデプス１ｏを
以下のようにして知ることができる。Here, with the above structure, the gap depth 1o after grinding can be known as follows.

第２図に示すように磁気ヘッドコア１の一方の外側面１
ｄと一方の突き合わせ面１ｂの下端との間隔を１１とし
、研削後の外側面１ｄと突き合わせ面１ｂの上端との間
隔を１２とし、外側面１ｄと突き合わせ面１ｂのなす角
をその延長面のＢ面、Ａ面で示すように先述したθとす
ると、ギャップデプス１ｏは下記の式によって求められ
る。As shown in FIG. 2, one outer surface 1 of the magnetic head core 1
The distance between d and the lower end of one abutting surface 1b is 11, the distance between the outer surface 1d after grinding and the upper end of the abutting surface 1b is 12, and the angle formed by the outer surface 1d and the abutting surface 1b is the extension surface. Assuming the above-mentioned θ as shown in the B side and the A side, the gap depth 1o is determined by the following formula.

ノｏ＝　　（１ｔ　　　、ｎ２’）／ｓｉｎ　　０寸法
で１と角度θは予め与えられておりＪ摺動面研削後の寸
法１２を測定すれば上記の式によりギャップデプス１ｏ
を算出できる。Noo = (1t, n2')/sin 0 dimension, 1 and angle θ are given in advance, and if dimension 12 after J sliding surface grinding is measured, the gap depth 1o is determined by the above formula.
can be calculated.

このようにして本実施例によれば研削後のキャンプデプ
ス１ｏを知ることができるので、求めたギャップデプス
に応じて研削を加減することにより容易にギャップデプ
スを均一に管理できる。In this way, according to the present embodiment, the camp depth 1o after grinding can be known, so that the gap depth can be easily managed uniformly by adjusting the grinding according to the determined gap depth.

なお−］−述の構造においては外側面１ｄ、ｌｄ′の全
体を磁気ギャップ６部分での媒体摺動方向に直交する方
向に平行な平面としたが、少なくともいずれか一方の外
側面の先端面ＩＣ側の端部を上記直交方向に平行な平面
とすれば、上記の式により研削後のギャップデプス寸法
で。を算出できる。Note that in the structure described above, the entire outer surfaces 1d and ld' are planes parallel to the direction orthogonal to the sliding direction of the medium in the 6 portions of the magnetic gap, but the tip surface of at least one of the outer surfaces If the end on the IC side is a plane parallel to the above-mentioned orthogonal direction, the gap depth dimension after grinding is determined by the above formula. can be calculated.

［効　果］ 以上の説明から明らかなように本発明の磁気ヘッドコア
によれば磁気ギャップ６部分での媒体摺動方向に直交す
る方向に対して傾斜した磁気ギャップ形成面である突き
合わせ面の上端と、摺動面のギャップ幅方向に隣接し上
記直交方向に平行で平面の外側面との間隔を測定するこ
とにより摺動面研削後に磁気ギャップの深さを知ること
ができるので、研削後のギャップ深さを極めて容易に均
一に管理でき、特性が均一な磁気へ・ンドを構成できる
。また本発明の構造は極めて簡単で安価に実現できる。[Effects] As is clear from the above description, according to the magnetic head core of the present invention, the upper end of the abutting surface, which is the magnetic gap forming surface that is inclined with respect to the direction perpendicular to the medium sliding direction, in the 6 portions of the magnetic gap. , the depth of the magnetic gap can be determined after grinding the sliding surface by measuring the distance between the sliding surface and the outer surface of the flat surface that is adjacent to the gap width direction and parallel to the above-mentioned orthogonal direction. The depth can be controlled extremely easily and uniformly, and a magnetic field with uniform characteristics can be constructed. Furthermore, the structure of the present invention is extremely simple and can be realized at low cost.

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

第１図は従来の磁気ヘッドコアから構成した磁気ヘッド
の内部構造を示す横断平面図、第２図は本発明の実施例
による磁気ヘッドコアから構成した磁気ヘッドの横断平
面図である。 ■・・・磁気ヘッドコア　ｌａ、ｌａ′・・・コア半体
ｌｂ、ｌｂ′・・・突き合わせ面 ＩＣ・・・先端面　　　　１ｄ、ｌｄ′・・・外側面２
・・・コア保持体　　　３・・・巻線４・・・ポビン　
　　　　５・・・接続端子Ｇ・・・磁気ギャップ ’！　”２　　ｃ−ａ　　　−３ 謝　　　　　９FIG. 1 is a cross-sectional plan view showing the internal structure of a magnetic head constructed from a conventional magnetic head core, and FIG. 2 is a cross-sectional plan view of a magnetic head constructed from a magnetic head core according to an embodiment of the present invention. ■... Magnetic head core la, la'... Core half lb, lb'... Butt surface IC... Tip surface 1d, ld'... Outer surface 2
... Core holder 3 ... Winding wire 4 ... Pobin
5... Connection terminal G... Magnetic gap'! ”2 c-a-3 xie 9

Claims (1)

【特許請求の範囲】[Claims] 対のコア構成部材を突き合わせてリング状に構成され、
前記部材先端の突き合わせ面間に形成した磁気ギャップ
を磁気記録媒体に摺動して情報の記録、再生を行なう磁
気ヘッドコアにおいて、前記突き合わせ面を、前記ギャ
ップ部分での前記媒体の摺動方向に直交する方向に対し
て傾斜した平面とし、前記ギャップを含む前記媒体摺動
面の前記ギャップの幅方向に隣接する外側面の少なくと
も一方の摺動面側の端部を前記直交方向に平行な平面と
したことを特徴とする磁気ヘッドコア。It is configured in a ring shape by abutting a pair of core components,
In a magnetic head core that records and reproduces information by sliding a magnetic gap formed between abutting surfaces of the tips of the members onto a magnetic recording medium, the abutting surfaces are perpendicular to the sliding direction of the medium at the gap portion. a plane that is inclined with respect to a direction in which at least one sliding surface side of at least one outer surface of the medium sliding surface that includes the gap is adjacent in the width direction of the gap is a plane that is parallel to the orthogonal direction; A magnetic head core characterized by: