JPS63133307A - Manufacture of magnetic head - Google Patents
Manufacture of magnetic headInfo
- Publication number
- JPS63133307A JPS63133307A JP27999886A JP27999886A JPS63133307A JP S63133307 A JPS63133307 A JP S63133307A JP 27999886 A JP27999886 A JP 27999886A JP 27999886 A JP27999886 A JP 27999886A JP S63133307 A JPS63133307 A JP S63133307A
- Authority
- JP
- Japan
- Prior art keywords
- core
- gap
- magnetic head
- head
- split bobbin
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 3
- 239000012634 fragment Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気ヘッドに関し、特にVTR用全幅消去ヘッ
ド等に有用な、シングルギャップタイプの磁気消去ヘッ
ドの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and more particularly to a method for manufacturing a single-gap type magnetic erase head useful for full-width erase heads for VTRs and the like.
この種の磁気消去ヘッドに類似するものとして、シング
ルギャップタイプの磁気消去へ、ノドを第5図を参照し
て説明する。この磁気ヘッドは、コイル1を巻回したボ
ビン2を装着した断面U形のバックコア23とフロント
コア4とからなる。As something similar to this type of magnetic erasing head, a single gap type magnetic erasing head will be described with reference to FIG. This magnetic head consists of a back core 23 and a front core 4, each having a U-shaped cross section, on which a bobbin 2 on which a coil 1 is wound is attached.
フロントコア4は、バックコア3の互いに平行な2つの
端面に、固着される2つのコア片41の間に、ガラスボ
ンディングによる磁気ギャップを形成してなる。すなわ
ち、2つのコア片41は薄い〃ラス材5を介して対向さ
れる。The front core 4 is formed by forming a magnetic gap between two core pieces 41 fixed to two mutually parallel end surfaces of the back core 3 by glass bonding. That is, the two core pieces 41 are opposed to each other with the thin lath material 5 interposed therebetween.
ところで、この磁気ヘッドはフロントコア4の製造工程
に問題がある。すなわち、フロントコア4はバックコア
3に固着した後、ヘッド面が所定の曲率を持つように曲
面加工される。ところが、フロントコア4の磁気ギャッ
プ部分は、@械的強度が不安定で曲面加工時、特に両端
のc、c’部分より割れが発生する欠点がある。However, this magnetic head has a problem in the manufacturing process of the front core 4. That is, after the front core 4 is fixed to the back core 3, the head surface is curved to have a predetermined curvature. However, the magnetic gap portion of the front core 4 has an unstable mechanical strength and has the disadvantage that cracks occur particularly at the c and c' portions at both ends when machining a curved surface.
本発明はかかる点に鑑み、フロントコア、バックコアを
一体としたコアへ狭ギャップを加工し、バンクコア相当
部分にボビン挿入をし、コイルを巻回し、ケース挿入後
樹脂を注入し、ギャップ部分にO(脂を注入し、所定の
R曲率へ研摩加工をしてヘッドを作ることにより、従来
の欠点を解消した磁気ヘッドの製造方法を提案すること
を主たる目的とする。In view of these points, the present invention creates a narrow gap in a core that integrates a front core and a back core, inserts a bobbin into the part corresponding to the bank core, winds a coil, and injects resin into the gap part after inserting the case. The main purpose of the present invention is to propose a method of manufacturing a magnetic head that eliminates the drawbacks of the conventional method by injecting O (oil) and polishing the head to a predetermined R curvature.
以下本考案の一実施例について図面を参照しながら詳細
に説明する。An embodiment of the present invention will be described in detail below with reference to the drawings.
まず第1図に示す如く、一体形のフェライトコアに狭ギ
ャップ(50〜70μ程度)3aを加工し、第2図に示
す如く、割り型ボビン2を挿入し、第3図に示す如く、
フィル1を巻回し製造する。First, as shown in Fig. 1, a narrow gap (approximately 50 to 70μ) 3a is machined in an integrated ferrite core, a split bobbin 2 is inserted as shown in Fig. 2, and as shown in Fig. 3,
Manufacture by winding the fill 1.
そして第4図に示す如く、ギャップ部3aは、従来のプ
ラスの注入に替え、ヘッドコア成形時にエポキシ樹脂等
をギャップ部3aへも注入し、更に、所定の曲率面(二
点鎖線図示)に研摩をして完成させる。As shown in FIG. 4, instead of the conventional positive injection, epoxy resin or the like is also injected into the gap part 3a during head core molding, and the gap part 3a is further polished to a predetermined curvature surface (as shown by the two-dot chain line). and complete it.
以上述べたごとく本発明によれば、サイドコア、センタ
ーコア、フロントコア、バックコアを−4にしたコアに
狭ギャップを成形し、バックコア部分へ割りボビンを挿
入し、該割りボビンにフィルを巻回し、上記ギャップ部
分に形状成型用樹脂の注入時に同樹脂を流し込んで成形
するようにしたので、
従来のようにコアの端面部分の欠けもな(なり、また、
工程が簡略化されるため低コスF化が図れる。したがっ
て、不良品の発生率が小さく、しかも磁気特性の安定し
た磁気消去ヘッドを提供することができる。As described above, according to the present invention, a narrow gap is formed in a core in which the side core, center core, front core, and back core are set to -4, a split bobbin is inserted into the back core portion, and a fill is wound around the split bobbin. Since the shape molding resin is injected into the above-mentioned gap and molded, there is no chipping of the end face of the core like in the past.
Since the process is simplified, cost F can be reduced. Therefore, it is possible to provide a magnetic erasing head with a low incidence of defective products and stable magnetic characteristics.
第1図、第2図、第3図及び第4図は本発明の一実施例
を示す各工程図、第5図は従来の磁気ヘッドの例を示す
斜視図である。
1・・・コイル、2・・・割りボビン、3・・・フェラ
イトコア、3a・・・ギヤツブ。
出願人代理人 弁理士 秋 山 高第4図
第1図 第2図
第3118X
第 5図 と・1, 2, 3, and 4 are process diagrams showing one embodiment of the present invention, and FIG. 5 is a perspective view showing an example of a conventional magnetic head. 1... Coil, 2... Split bobbin, 3... Ferrite core, 3a... Gear knob. Applicant's representative Patent attorney Takashi Akiyama Figure 4 Figure 1 Figure 2 Figure 3118X Figure 5
Claims (1)
を一体にしたコアに狭ギャップを成形し、バックコア部
分へ割りボビンを挿入し、該割りボビンにコイルを巻回
し、上記ギャップ部分に形状成型用樹脂の注入時に同樹
脂を流し込んで成形するようにしたことを特徴とする磁
気ヘッドの製造方法。A narrow gap is molded into the core that integrates the side core, center core, front core, and back core, a split bobbin is inserted into the back core part, a coil is wound around the split bobbin, and a shape molding resin is applied to the gap part. A method for manufacturing a magnetic head, characterized in that the same resin is poured and molded during injection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27999886A JPS63133307A (en) | 1986-11-25 | 1986-11-25 | Manufacture of magnetic head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27999886A JPS63133307A (en) | 1986-11-25 | 1986-11-25 | Manufacture of magnetic head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63133307A true JPS63133307A (en) | 1988-06-06 |
Family
ID=17618881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27999886A Pending JPS63133307A (en) | 1986-11-25 | 1986-11-25 | Manufacture of magnetic head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63133307A (en) |
-
1986
- 1986-11-25 JP JP27999886A patent/JPS63133307A/en active Pending
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