JP2589011Y2 - Tunnel erase type magnetic head - Google Patents

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は例えばフロッピーディスクを用いるディジタ
ル信号用磁気記録再生装置などの記録再生用磁気ヘッド
に関する。 〔従来の技術〕 フロッピーディスクの記録再生には記録再生用磁気ギ
ャップを有する記録再生ヘッド素子の両側にその磁気ギ
ャップと同じ方向に消去用磁気ギャップを有する消去ヘ
ッド素子を両ギャップ間に所要の間隔をおいて配置する
こトンネルイレーズ型磁気ヘッドが用いられる。 従来のトンネルイレーズ型の磁気ヘッドは第２図およ
び第３図に示す様に，軟磁性体よりなる２個の磁気コア
１と２とを突き合わせて磁気ギャップ12を形成し，巻枠
10に巻線を施した記録再生ヘッド用コイル４に磁気コア
１を挿入し，バックコア３で磁気コア１と２の間を連結
し閉磁路を形成して記録再生用ヘッドとしていた。ま
た，消去用ヘッドコア部材５と５′及び６と６′を突き
合わせて磁気ギャップ14及び15を形成し，巻枠11に巻線
を施した消去用ヘッドコイル７に磁気コア５と６を挿入
し，消去用磁気ヨーク19で消去用ヘッドコア５と５′及
び６と６′を連結し消去用磁気ヘッドを形成していた。 すなわち，これらの磁気コアは第３図に示す様に軟磁
性体の磁気コア1,2との突き合わせで磁気ギャップ12を
形成し，これと非磁性材料から成るＵ字型のコア素子13
とを記録再生用ヘッドコアとし，この記録再生用磁気コ
ア1,2及びコア素子13の両側面に消去用磁気ギャップ14
及び15を重ね，かつ非磁性材料から成るＬ字形のコア素
子16,17をもつ消去用磁気コア部材5,5′及び6,6′を重
ね合せ，さらにこれらを非磁性スライダ８と９で挾持固
定している。 〔考案が解決しようとする問題点〕 従来の構造の磁気ヘッド，特に消去用磁気ヘッドにお
いては第２図に示す様な形状の消去用磁気ヨーク19が用
いられているが，この磁気ヨークは消去用ヘッドコア5,
5′及び6,6′に用いられるNi−Znフェライトを研削して
形成されているため，手間がかかると同時に高価であ
る。 〔問題点を解決するための手段〕 本考案は、従来のかかる欠点を除くものであり、軟磁
性材よりなり、記録再生用磁気ギャップが形成された磁
気コアを、消去用磁気ギャップを形成する２枚の磁気コ
アで挟み込み、非磁性材よりなるスライダにて積層して
構成した積層型磁気ヘッドにおいて、板状の磁性材料PC
パーマロイを打ち抜いて得られた板状部材であって、第
１の方向における先端部及び後端部との間に、当該第１
の方向に対して直交する第２の方向において互いに対向
するようにして設けられたＵ字状切欠部を有する板状部
材の前記先端部を、前記第１及び第２の方向に対して直
交する第３の方向において、逆Ｕ字型に曲げ加工してな
る形状の消去用磁気ヨークを具え、当該消去用磁気ヨー
クの前記逆Ｕ字型に曲げ加工された前記先端部で消去用
Ｉ型コアを挟み込み、且つ、板状である前記後端部を消
去用Ｃ型コアの磁気ギャップと反対側の面に密着してな
るトンネルイレーズ型磁気ヘッドである。 〔実施例〕 本考案磁気ヘッドの実施例について図面を用いて説明
する。 第１図に示す様に本考案による磁気ヘッドは，第３図
に示す軟磁性材料よりなる２個の記録再生磁気コア1,2
の先端を突き合わせて磁気ギャップ12を形成し，これと
非磁性材料から成るＵ字形のコア素子13とを記録再生用
磁気ヘッドとし，この両側に磁気コア５と５′及び６と
６′を突き合わせて磁気ギャップ14及び15を形成し，こ
れと非磁性材料から成るＬ字形のコア素子16,17により
構成される２個の消去用磁気ヘッドを重ね合わせ，さら
にこれを非磁性材料から成るスライダ8,9で挾持固定し
て磁気ヘッドを形成する。 さらに，巻枠10に巻線を施した記録再生用ヘッドコイ
ル４に磁気コア１を挿入し，バックコア３で磁気コア１
と２の間を連結し閉磁路を形成して記録再生用ヘッドと
する。また，第３図の消去用ヘッドコア部材５と６を巻
枠11に巻線を施した消去用ヘッドコイル７に挿入し，本
考案による消去用磁気ヨーク18で消去用ヘッドコア５と
５′及び６と６′を連結し，消去用磁気ヘッドを形成す
る。 本考案による消去用磁気ヨーク18は、図１を参照すれ
ば明らかなように、軟磁性材である板状（約t0.2）のPC
パーマロイを打ち抜いて得られた板状部材を曲げ加工し
て得られる形状を有する。詳しくは、当該曲げ加工後に
非磁性スライダ９の長手方向に相当する当該板状部材上
の方向を第１の方向とすると、当該板状部材は、第１の
方向における先端部及び後端部との間に、当該第１の方
向に対して直交する第２の方向において互いに対向する
ようにして設けられたＵ字状切欠部を有するものであ
り、消去用磁気ヨーク18は、当該板状部材の前記先端部
を、前記第１及び第２の方向に対して直交する第３の方
向において、逆Ｕ字型に曲げ加工してなる形状を有す
る。かかる形状の消去用磁気ヨーク18により、逆Ｕ字型
に曲げ加工された先端部で消去用Ｉ型コアを挟み込み、
且つ、板状である後端部を消去用Ｃ型コアの磁気ギャッ
プと反対側の面に密着させることで、前述のように、消
去用ヘッドコア５と５′及び６と６′を連結すると消去
用磁気ヘッドを形成することができる。 〔考案の効果〕 上述したように，従来の消去用磁気ヨークは軟磁性材
であるNi−Znフェライトを研削して形成されるため加工
工数がかかり高価であったが，本考案による消去用磁気
ヨークは軟磁性である板状（約t0.2）のPCパーマロイを
打抜き曲げ加工により形成されるため従来品に比べかな
り安価になる。 また、本考案によれば、消去用磁気ヨーク18は、先端
部と後端部との間にＵ字状切欠部を有する板状部材を用
いているため、先端部を逆Ｕ字型に曲げ加工する際、後
端部を当該曲げの影響が及ばないこととなり、後端部は
板状のままであることから、先端部では消去用Ｉ型コア
を挟み込み、かつ、後端部は、消去用Ｃ型コアの磁気ギ
ャップと反対側の面に対して密着することが可能であ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording / reproducing magnetic head such as a digital signal magnetic recording / reproducing apparatus using a floppy disk. [Prior Art] For recording / reproducing of a floppy disk, an erasing head element having an erasing magnetic gap in the same direction as the magnetic gap on both sides of a recording / reproducing head element having a recording / reproducing magnetic gap has a required interval between the two gaps. A tunnel erase type magnetic head which is arranged at a predetermined distance is used. As shown in FIGS. 2 and 3, a conventional tunnel erase type magnetic head forms a magnetic gap 12 by abutting two magnetic cores 1 and 2 made of a soft magnetic material.
The magnetic core 1 is inserted into a recording / reproducing head coil 4 having a winding 10 and the back core 3 connects the magnetic cores 1 and 2 to form a closed magnetic path to form a recording / reproducing head. Further, magnetic gaps 14 and 15 are formed by abutting the erasing head core members 5 and 5 'and 6 and 6', and the magnetic cores 5 and 6 are inserted into the erasing head coil 7 in which the winding form 11 is wound. The erasing magnetic yoke 19 connects the erasing head cores 5 and 5 'and 6 and 6' to form an erasing magnetic head. That is, these magnetic cores form a magnetic gap 12 by abutting with soft magnetic cores 1 and 2 as shown in FIG. 3 and a U-shaped core element 13 made of a nonmagnetic material.
Are the recording / reproducing head cores, and the erasing magnetic gaps 14 are provided on both sides of the recording / reproducing magnetic cores 1 and 2 and the core element 13.
And 15 are superimposed, and erasing magnetic core members 5, 5 'and 6, 6' having L-shaped core elements 16, 17 made of non-magnetic material are superposed, and these are sandwiched between non-magnetic sliders 8 and 9. It is fixed. [Problems to be Solved by the Invention] In a conventional magnetic head, particularly an erasing magnetic head, an erasing magnetic yoke 19 having a shape as shown in FIG. 2 is used. Head core 5,
Since it is formed by grinding Ni-Zn ferrite used for 5 'and 6,6', it is troublesome and expensive. [Means for Solving the Problems] The present invention eliminates such a conventional drawback, and forms a magnetic core made of a soft magnetic material and having a recording / reproducing magnetic gap formed therein, as an erasing magnetic gap. In a laminated magnetic head that is sandwiched between two magnetic cores and laminated with a slider made of non-magnetic material, a plate-shaped magnetic material PC
A plate-like member obtained by punching permalloy, wherein the first member is disposed between a front end portion and a rear end portion in a first direction.
The front end of a plate-shaped member having a U-shaped notch provided so as to be opposed to each other in a second direction orthogonal to the first direction is orthogonal to the first and second directions. An erasing magnetic yoke having a shape formed by bending into an inverted U-shape in a third direction, the erasing I-shaped core being formed at the tip of the erasing magnetic yoke bent into the inverted U shape; And a plate-shaped rear end portion of which is in close contact with the surface opposite to the magnetic gap of the erasing C-shaped core. Embodiment An embodiment of the magnetic head of the present invention will be described with reference to the drawings. As shown in FIG. 1, the magnetic head according to the present invention comprises two recording / reproducing magnetic cores 1 and 2 made of a soft magnetic material shown in FIG.
The magnetic gap 12 is formed by abutting the tips of the magnetic heads, and this and a U-shaped core element 13 made of a non-magnetic material are used as a recording / reproducing magnetic head, and the magnetic cores 5 and 5 'and 6 and 6' are abutted on both sides. Magnetic gaps 14 and 15 are formed, and two erasing magnetic heads composed of L-shaped core elements 16 and 17 made of a non-magnetic material are overlapped with each other. , 9 to form a magnetic head. Further, the magnetic core 1 is inserted into the recording / reproducing head coil 4 in which the winding frame 10 is wound, and the magnetic core 1 is
And 2 are connected to form a closed magnetic path to form a recording / reproducing head. In addition, the erasing head core members 5 and 6 shown in FIG. 3 are inserted into the erasing head coil 7 having the winding wound on the winding frame 11, and the erasing head cores 5 and 5 'and 6 are inserted by the erasing magnetic yoke 18 according to the present invention. And 6 'are connected to form an erasing magnetic head. The erasing magnetic yoke 18 according to the present invention is, as is apparent from FIG. 1, a plate-like (about t0.2) PC made of a soft magnetic material.
It has a shape obtained by bending a plate-like member obtained by punching permalloy. Specifically, assuming that a direction on the plate member corresponding to the longitudinal direction of the non-magnetic slider 9 after the bending process is a first direction, the plate member has a front end portion and a rear end portion in the first direction. And a U-shaped notch provided so as to face each other in a second direction orthogonal to the first direction. Has a shape formed by bending an inverted U-shape in a third direction orthogonal to the first and second directions. With the erase magnetic yoke 18 having such a shape, the erase I-type core is sandwiched between the tip portions bent into an inverted U shape,
In addition, the erasing head cores 5 and 5 'and 6 and 6' are connected to each other by erasing, as described above, by adhering the plate-shaped rear end portion to the surface opposite to the magnetic gap of the erasing C-shaped core. Magnetic head can be formed. [Effects of the Invention] As described above, the conventional magnetic yoke for erasing is formed by grinding Ni-Zn ferrite, which is a soft magnetic material, and thus requires a large number of processing steps and is expensive. Since the yoke is formed by punching and bending a soft magnetic plate-like (about t0.2) PC permalloy, it is considerably less expensive than conventional products. Further, according to the present invention, since the erasing magnetic yoke 18 uses a plate-shaped member having a U-shaped notch between the front end and the rear end, the front end is bent into an inverted U-shape. When processing, the rear end is not affected by the bending, and the rear end remains plate-shaped, so that the erasing I-type core is sandwiched at the front end and the rear end is erased. It is possible to make close contact with the surface of the C-shaped core opposite to the magnetic gap.

【図面の簡単な説明】 第１図は本考案による消去用磁気ヨークを用いたトンネ
ルイレーズ型の磁気ヘッドの実施例を示す外観斜視図，
第２図は従来の消去用磁気ヨークを用いたトンネルイレ
ーズ型ヘッドの例の外観斜視図、第３図は第１図及び第
２図において記録再生用磁気コア，消去用磁気コア，及
びスライダの各部に分解した分解斜視図である。 なお， 1,2:磁気コア,3:バックコア,4:コイル,5,5′,6,6′：消
去用コア部材,7:消去用コイル,8,9:スライダ,10,11:巻
枠,12,14,15:磁気ギャップ,13,16,17:コア素子,18:本考
案による消去用磁気ヨーク,19:従来の消去用磁気ヨー
ク。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view showing an embodiment of a tunnel erase type magnetic head using an erasing magnetic yoke according to the present invention,
FIG. 2 is an external perspective view of an example of a conventional tunnel erase type head using an erasing magnetic yoke, and FIG. 3 is a diagram of the recording / reproducing magnetic core, erasing magnetic core, and slider in FIGS. 1 and 2. It is the disassembled perspective view disassembled into each part. 1,2: magnetic core, 3: back core, 4: coil, 5, 5 ', 6, 6': erasing core member, 7: erasing coil, 8, 9: slider, 10, 11: winding Frame, 12, 14, 15: magnetic gap, 13, 16, 17: core element, 18: magnetic yoke for erasing according to the present invention, 19: conventional magnetic yoke for erasing.

Claims (1)

(57)【実用新案登録請求の範囲】 １．軟磁性材よりなり、記録再生用磁気ギャップが形成
された磁気コアを、消去用磁気ギャップを形成する２枚
の磁気コアで挟み込み、非磁性材よりなるスライダにて
積層して構成した積層型磁気ヘッドにおいて、板状の磁
性材料PCパーマロイを打ち抜いて得られた板状部材であ
って、第１の方向における先端部及び後端部との間に、
当該第１の方向に対して直交する第２の方向において互
いに対向するようにして設けられたＵ字状切欠部を有す
る板状部材の前記先端部を、前記第１及び第２の方向に
対して直交する第３の方向において、逆Ｕ字型に曲げ加
工してなる形状の消去用磁気ヨークを具え、当該消去用
磁気ヨークの前記逆Ｕ字型に曲げ加工された前記先端部
で消去用Ｉ型コアを挟み込み、且つ、板状である前記後
端部を消去用Ｃ型コアの磁気ギャップと反対側の面に密
着してなるトンネルイレーズ型磁気ヘッド。(57) [Rules for requesting registration of utility model] A laminated magnetic structure in which a magnetic core made of a soft magnetic material and having a recording / reproducing magnetic gap formed therebetween is sandwiched between two magnetic cores forming an erasing magnetic gap, and laminated with a slider made of a nonmagnetic material. In the head, a plate-like member obtained by punching out a plate-like magnetic material PC permalloy, between the front end and the rear end in the first direction,
The distal end of a plate-shaped member having a U-shaped notch provided so as to face each other in a second direction orthogonal to the first direction, with respect to the first and second directions. A magnetic yoke having a shape formed by bending an inverted U-shape in a third direction orthogonal to the vertical direction, and using the tip of the magnetic yoke for bending which is bent into the inverted U-shape. A tunnel erase-type magnetic head having an I-shaped core sandwiched therebetween and having the plate-shaped rear end in close contact with a surface opposite to a magnetic gap of an erasing C-shaped core.