JPH07220225A - Magnetic gap forming jig - Google Patents

Magnetic gap forming jig

Info

Publication number
JPH07220225A
JPH07220225A JP826394A JP826394A JPH07220225A JP H07220225 A JPH07220225 A JP H07220225A JP 826394 A JP826394 A JP 826394A JP 826394 A JP826394 A JP 826394A JP H07220225 A JPH07220225 A JP H07220225A
Authority
JP
Japan
Prior art keywords
magnetic gap
core
forming jig
spacer
gap forming
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
JP826394A
Other languages
Japanese (ja)
Inventor
Eizo Ono
栄三 小野
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP826394A priority Critical patent/JPH07220225A/en
Publication of JPH07220225A publication Critical patent/JPH07220225A/en
Pending legal-status Critical Current

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  • Magnetic Heads (AREA)

Abstract

PURPOSE:To improve the accuracy of a magnetic gap and to prolong the life of a magnetic gap forming jig by disposing an I-shaped spacer consisting of copper, etc., between the outer side face of the one core and the outer side face of the other core. CONSTITUTION:This magnetic gap forming jig has a jig body 12 which is provided with a groove at its center, a press plate 18 which is placed with plural cores 14, 15 butting their gap-facing surfaces to this groove and presses the outer side faces of the cores, a leaf spring 19 which presses this press plate 18 and a screw 13 which presses this leaf spring 19. The jig has the I-shaped spacer 17 consisting of copper or copper alloy between the outer side face of the one core and the outer side face of the other core which faces each other. The magnetic gap is formed by melting glass 16 at a high temp. in the state of pressing the press plate 18 by the torque of the spring 13 via the leaf spring 19.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は磁気ディスク装置やフロ
ッピーディスク装置等に用いられる磁気ヘッドの磁気ギ
ャップ形成治具に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic gap forming jig for a magnetic head used in a magnetic disk device, a floppy disk device or the like.

【０００２】[0002]

【従来の技術】以下従来の磁気ギャップ形成治具につい
て図面を参照しながら説明する。図４は従来の磁気ギャ
ップ形成治具の側面図を示すものである。図４におい
て、１は中央に溝を設けた治具本体、２は治具本体１の
側面に設けられたねじ、３はフェライトからなるコアの
ギャップ対向面に金属磁性膜を設けたＩ字形コア、４は
Ｉ字形コア３と同じ材質からなるコアのギャップ対向面
に金属磁性膜を設けたＣ字形コア、５はＩ字形コア３の
ギャップ対向面とＣ字形コア４のギャップ対向面とを突
き合わせ、突き合わせた窪みの谷間に設けた棒状のガラ
ス、６はそれぞれのＩ字形コア３との間に設けられた部
分安定化ジルコニア等のセラミックスからなるＩ字形の
スペーサー、７はＩ字形コア３とスペーサー６との間に
設けられたマイカ、８はＣ字形コア４の側面を押圧する
押板、９は押板８とねじ２との間に設けられた板ばねで
ある。2. Description of the Related Art A conventional magnetic gap forming jig will be described below with reference to the drawings. FIG. 4 is a side view of a conventional magnetic gap forming jig. In FIG. 4, 1 is a jig main body having a groove in the center, 2 is a screw provided on the side surface of the jig main body 1, 3 is an I-shaped core having a metal magnetic film on the gap facing surface of a core made of ferrite Reference numeral 4 is a C-shaped core in which a metal magnetic film is provided on a gap facing surface of a core made of the same material as the I-shaped core 3, and 5 is a gap facing surface of the I-shaped core 3 and a gap facing surface of the C-shaped core 4. , Bar-shaped glass provided in the valleys of the butted recesses, 6 is an I-shaped spacer made of ceramics such as partially stabilized zirconia provided between each I-shaped core 3, and 7 is an I-shaped core 3 and a spacer 6 is a mica provided between the pressing plate 8 and the pressing plate 8 for pressing the side surface of the C-shaped core 4, and 9 is a leaf spring provided between the pressing plate 8 and the screw 2.

【０００３】このように構成した磁気ギャップ形成治具
には、Ｉ字形コア３とＣ字形コア４との間を密着させる
ように、Ｃ字形コア４の側面に押板８を板ばね９を介し
てねじ２のトルクにより押圧した状態で電気炉等の高温
度のもとでガラス５を溶解させて磁気ギャップを形成す
る。In the magnetic gap forming jig thus constructed, a pressing plate 8 is provided on the side surface of the C-shaped core 4 via a leaf spring 9 so that the I-shaped core 3 and the C-shaped core 4 are in close contact with each other. The glass 5 is melted under the high temperature of an electric furnace or the like while being pressed by the torque of the screw 2 to form a magnetic gap.

【０００４】[0004]

【発明が解決しようとする課題】このような上記従来の
磁気ギャップ形成治具では、磁気ギャップの安定化と磁
気ギャップを形成する際にコアのひびやクラックを防止
するためにコア側面にマイカ７を用いているが、磁気ギ
ャップの狭小化に伴いマイカ７からの塵粉が磁気ギャッ
プ内に入り歩留まりを低下させると共に、部分安定化ジ
ルコニアのスペーサー６は高温度になると物理的安定相
が正方晶から単斜晶へと相転移を起こすことで、図５に
示すようにスペーサー６が矢印１０方向に変形して変形
量１１が起こり、磁気ギャップが不安定に形成されると
いう問題点を有していた。In the above-mentioned conventional magnetic gap forming jig, the mica 7 is formed on the side surface of the core in order to stabilize the magnetic gap and prevent cracks and cracks in the core when forming the magnetic gap. However, as the magnetic gap becomes narrower, dust particles from the mica 7 enter the magnetic gap to lower the yield, and the spacer 6 of partially stabilized zirconia has a physically stable phase of tetragonal crystal at high temperature. As shown in FIG. 5, the spacer 6 is deformed in the direction of the arrow 10 to cause the amount of deformation 11 as a result of the phase transition from to monoclinic crystal, resulting in an unstable magnetic gap. Was there.

【０００５】本発明は上記従来の問題点を解決するもの
で、コアにひびやクラック等をなくし、磁気ギャップの
精度を向上させた磁気ギャップ形成治具を提供すること
を目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic gap forming jig which eliminates cracks and cracks in the core and improves the accuracy of the magnetic gap.

【０００６】[0006]

【課題を解決するための手段】この目的を達成するため
に本発明の磁気ギャップ形成治具は、中央に溝を設けた
治具本体と、前記溝にギャップ対向面を突き合わせたコ
アを複数載置すると共に、前記コアの外側面を押圧する
押板と、前記押板を押圧する板ばねと、前記板ばねを押
圧する前記治具本体の側面に設けられたねじとを備え、
一方の前記コアの外側面と対向した他方の前記コアの外
側面との間に銅、或いは銅合金からなるＩ字形のスペー
サーを設けた構成を有している。In order to achieve this object, a magnetic gap forming jig of the present invention has a jig main body having a groove at its center and a plurality of cores having gap facing surfaces abutting against the groove. Placed, a pressing plate that presses the outer surface of the core, a plate spring that presses the pressing plate, and a screw provided on the side surface of the jig body that presses the plate spring,
An I-shaped spacer made of copper or a copper alloy is provided between the outer surface of one of the cores and the outer surface of the other of the cores.

【０００７】[0007]

【作用】この構成によって、磁気ギャップ形成治具の長
寿命化と磁気ギャップの精度を向上させることができ
る。With this structure, the life of the magnetic gap forming jig can be extended and the accuracy of the magnetic gap can be improved.

【０００８】[0008]

【実施例】【Example】

（実施例１）以下本発明の第１の実施例について図面を
参照しながら説明する。図１は本発明の第１の実施例に
おける磁気ギャップ形成治具の側面図である。図１にお
いて、１２は中央に溝を設けた治具本体、１３は治具本
体１２の側面に設けられたねじ、１４はフェライトから
なるコアのギャップ対向面に金属磁性膜を設けたＩ字形
コア、１５はＩ字形コア１４と同じ材質からなるコアの
ギャップ対向面に金属磁性膜を設けたＣ字形コア、１６
はＩ字形コア１４のギャップ対向面とＣ字形コア１５の
ギャップ対向面とを突き合わせ、突き合わせた窪みの谷
間に設けた棒状のガラス、１７はそれぞれのＩ字形コア
１４との間に設けられた銅、或いは銅合金からなるＩ字
形のスペーサー、１８はＣ字形コア１５の側面を押圧す
る押板、１９は押板１８とねじ１３との間に設けられた
板ばねである。(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a magnetic gap forming jig according to the first embodiment of the present invention. In FIG. 1, 12 is a jig main body having a groove in the center, 13 is a screw provided on the side surface of the jig main body 12, and 14 is an I-shaped core in which a metal magnetic film is provided on the gap facing surface of a core made of ferrite. , 15 are C-shaped cores in which a metal magnetic film is provided on the gap facing surface of a core made of the same material as the I-shaped core 14, 16
Is a bar-shaped glass provided by abutting the gap-opposing surface of the I-shaped core 14 and the gap-opposing surface of the C-shaped core 15, and 17 is a copper provided between the I-shaped core 14 and each of the I-shaped cores 14. Alternatively, 18 is an I-shaped spacer made of copper alloy, 18 is a pressing plate for pressing the side surface of the C-shaped core 15, and 19 is a leaf spring provided between the pressing plate 18 and the screw 13.

【０００９】このように構成した磁気ギャップ形成治具
は、治具本体１２の溝に、Ｉ字形コア１４とＩ字形コア
１４との間にスペーサー１７を介して、Ｉ字形コア１４
のギャップ対向面とＣ字形コア１５のギャップ対向面と
を密着させると共に、Ｃ字形コア１５のギャップ対向面
と反対側の面に押板１８を板ばね１９を介してねじ１３
のトルクにより押圧した状態で、電気炉等の高温度のも
とでガラス１６を溶解させて磁気ギャップを形成する。In the magnetic gap forming jig having the above-described structure, the I-shaped core 14 is inserted in the groove of the jig body 12 with the spacer 17 interposed between the I-shaped core 14 and the I-shaped core 14.
The gap facing surface of C-shaped core 15 and the gap facing surface of C-shaped core 15 are closely contacted with each other, and a pressing plate 18 is attached to the surface of C-shaped core 15 opposite to the gap facing surface through a leaf spring 19 to screw 13.
The glass 16 is melted under the high temperature of an electric furnace or the like while being pressed by the torque of 1 to form a magnetic gap.

【００１０】このように銅、或いは銅合金からなるスペ
ーサー１７の材質と、ビッカース硬度と、磁気ギャップ
精度とを（表１）に示すものである。The material of the spacer 17 made of copper or copper alloy, the Vickers hardness, and the magnetic gap accuracy are shown in Table 1.

【００１１】[0011]

【表１】 [Table 1]

【００１２】（表１）において、スペーサー１７の硬度
は、磁気ギャップを形成した使用後に室温でビッカース
硬度Ｈｖを測定したものである。又、磁気ギャップの精
度の評価は、良好：ギャップ長の標準偏差が４％以内、
やや良好：ギャップ長の標準偏差が６％以内、やや悪
い：ギャップ長の標準偏差が８％以内、悪い：ギャップ
長の標準偏差が１２％以内である。又、参考までに従来
のスペーサー６と、スペーサー６の両側面にマイカ７を
使用した場合の磁気ギャップの精度を示している。この
ように銅、或いは銅合金からなるスペーサー１７を用い
るとＩ字形コア１４に接するスペーサー１７の面がなじ
み、マイカ７の塵粉も起こらないので磁気ギャップの形
成が安定し、十分な磁気ギャップの精度が得られる。In Table 1, the hardness of the spacer 17 is the Vickers hardness Hv measured at room temperature after use after forming the magnetic gap. Also, the accuracy of the magnetic gap is evaluated to be good: the standard deviation of the gap length is within 4%,
Somewhat good: standard deviation of gap length is within 6%, somewhat poor: standard deviation of gap length is within 8%, bad: standard deviation of gap length is within 12%. For reference, the accuracy of the magnetic gap when the conventional spacer 6 and the mica 7 on both side surfaces of the spacer 6 are shown. When the spacer 17 made of copper or copper alloy is used in this way, the surface of the spacer 17 in contact with the I-shaped core 14 fits in and the dust of the mica 7 does not occur, so that the formation of the magnetic gap is stable and a sufficient magnetic gap is obtained. Accuracy can be obtained.

【００１３】（実施例２）以下本発明の第２の実施例に
ついて図面を参照しながら説明する。図２は本発明の第
２の実施例における磁気ギャップ形成治具の側面図であ
る。図３は本発明の第２の実施例における磁気ギャップ
形成治具のスペーサーの斜視図である。図２において図
１と同符号のものは同一であるので説明は省略する。図
２、及び図３において、１２は治具本体、１３はねじ、
１４はＩ字形コア、１５はＣ字形コア、１６はガラス、
１８は押板、１９は板ばね、２０はそれぞれのＩ字形コ
ア１４との間に設けられ、実施例１のスペーサー１７よ
り硬度の硬いメタルあるいはセラミックからなるスペー
サー、２１はスペーサー２０と一体化され、スペーサー
２０の両側面に設けられた銅、或いは銅合金からなるク
ッション材である。(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a side view of a magnetic gap forming jig according to the second embodiment of the present invention. FIG. 3 is a perspective view of a spacer of a magnetic gap forming jig according to the second embodiment of the present invention. 2 that are the same as those in FIG. 1 are the same as those in FIG. 2 and 3, 12 is a jig body, 13 is a screw,
14 is an I-shaped core, 15 is a C-shaped core, 16 is glass,
Reference numeral 18 is a pressing plate, 19 is a leaf spring, 20 is provided between each I-shaped core 14, and is a spacer made of metal or ceramic having a hardness higher than that of the spacer 17 of the first embodiment, and 21 is integrated with the spacer 20. A cushion material made of copper or a copper alloy provided on both side surfaces of the spacer 20.

【００１４】このようにスペーサー２０と一体化された
クッション材２１を用いて磁気ギャップを形成すると、
従来のスペーサー７では１００サイクルまでは変形量１
１が２μｍ程度、ところが４００サイクルまで行うとそ
の変形量１１が７５μｍに達し、その変形によって所定
の箇所を押圧できない状態になり、磁気ギャップの精度
を不安定にしており、それにひきかえ本実施例では、４
００サイクルにおいてもその変形量は認められず、長期
に亘って安定した磁気ギャップの精度が得られるもので
ある。As described above, when the magnetic gap is formed by using the cushion material 21 integrated with the spacer 20,
With the conventional spacer 7, the deformation amount is 1 up to 100 cycles.
1 is about 2 μm, but when it is performed up to 400 cycles, the amount of deformation 11 reaches 75 μm, the predetermined position cannot be pressed by the deformation, and the accuracy of the magnetic gap becomes unstable. Four
The amount of deformation is not recognized even in the 00 cycle, and stable accuracy of the magnetic gap can be obtained over a long period of time.

【００１５】[0015]

【発明の効果】以上のように本発明は、一方のコアの外
側面と対向した他方のコアの外側面との間に銅、或いは
銅合金からなるＩ字形のスペーサーを設けたので、Ｉ字
形コアに接するスペーサーの面がなじみ、マイカの塵粉
も起こらないので磁気ギャップの精度が向上し、磁気ギ
ャップ形成治具の長寿命化を図ることができる優れた磁
気ギャップ形成治具を実現できるものである。As described above, according to the present invention, since the I-shaped spacer made of copper or copper alloy is provided between the outer surface of one core and the outer surface of the other core which faces the core, the I-shaped spacer is formed. The surface of the spacer that is in contact with the core is familiar, and dust of mica does not occur, so the accuracy of the magnetic gap is improved, and it is possible to realize an excellent magnetic gap forming jig that can extend the life of the magnetic gap forming jig. Is.

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

【図１】本発明の第１の実施例における磁気ギャップ形
成治具の側面図FIG. 1 is a side view of a magnetic gap forming jig according to a first embodiment of the present invention.

【図２】本発明の第２の実施例における磁気ギャップ形
成治具の側面図FIG. 2 is a side view of a magnetic gap forming jig according to a second embodiment of the present invention.

【図３】本発明の第２の実施例における磁気ギャップ形
成治具のスペーサーの斜視図FIG. 3 is a perspective view of a spacer of a magnetic gap forming jig according to a second embodiment of the present invention.

【図４】従来の磁気ギャップ形成治具の側面図FIG. 4 is a side view of a conventional magnetic gap forming jig.

【図５】従来の磁気ギャップ形成治具のスペーサーの変
形を示す斜視図FIG. 5 is a perspective view showing a modification of a spacer of a conventional magnetic gap forming jig.

【符号の説明】[Explanation of symbols]

１２ 治具本体 １３ ねじ １４ Ｉ字形コア １５ Ｃ字形コア １６ ガラス １７，２０ スペーサー １８ 押板 １９ 板ばね ２１ クッション材 12 jig body 13 screw 14 I-shaped core 15 C-shaped core 16 glass 17, 20 spacer 18 push plate 19 leaf spring 21 cushioning material

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】中央に溝を設けた治具本体と、前記溝にギ
ャップ対向面を突き合わせたコアを複数載置すると共
に、前記コアの外側面を押圧する押板と、前記押板を押
圧する板ばねと、前記板ばねを押圧する前記治具本体の
側面に設けられたねじとを備え、一方の前記コアの外側
面と対向した他方の前記コアの外側面との間に銅、或い
は銅合金からなるＩ字形のスペーサーを設けたことを特
徴とする磁気ギャップ形成治具。1. A jig main body having a groove in the center, a plurality of cores having gap facing surfaces abutting against the groove, and a pressing plate for pressing the outer surface of the core and the pressing plate. And a screw provided on the side surface of the jig body for pressing the leaf spring, and copper between the outer surface of one of the cores and the outer surface of the other of the cores, or A magnetic gap forming jig comprising an I-shaped spacer made of a copper alloy. 【請求項２】スペーサーのビッカース硬度を４０〜１２
０にしたことを特徴とする請求項１記載の磁気ギャップ
形成治具。2. The Vickers hardness of the spacer is 40-12.
The magnetic gap forming jig according to claim 1, wherein the magnetic gap forming jig is zero. 【請求項３】スペーサーの両側面に銅、或いは銅合金か
らなるクッション材を設けたことを特徴とする請求項１
記載の磁気ギャップ形成治具。3. A cushion material made of copper or a copper alloy is provided on both side surfaces of the spacer.
The described magnetic gap forming jig.
JP826394A 1994-01-28 1994-01-28 Magnetic gap forming jig Pending JPH07220225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP826394A JPH07220225A (en) 1994-01-28 1994-01-28 Magnetic gap forming jig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP826394A JPH07220225A (en) 1994-01-28 1994-01-28 Magnetic gap forming jig

Publications (1)

Publication Number Publication Date
JPH07220225A true JPH07220225A (en) 1995-08-18

Family

ID=11688274

Family Applications (1)

Application Number Title Priority Date Filing Date
JP826394A Pending JPH07220225A (en) 1994-01-28 1994-01-28 Magnetic gap forming jig

Country Status (1)

Country Link
JP (1) JPH07220225A (en)

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