JPS6032105A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS6032105A JPS6032105A JP14059983A JP14059983A JPS6032105A JP S6032105 A JPS6032105 A JP S6032105A JP 14059983 A JP14059983 A JP 14059983A JP 14059983 A JP14059983 A JP 14059983A JP S6032105 A JPS6032105 A JP S6032105A
- Authority
- JP
- Japan
- Prior art keywords
- holder
- synthetic resin
- core
- resin
- magnetic head
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/105—Mounting of head within housing or assembling of head and housing
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は磁気ヘッドに係り、さらに詳しくはホルダ内に
磁気コアを収容し、合成樹脂により固着する構造の磁気
ヘッドに関するものである。TECHNICAL FIELD The present invention relates to a magnetic head, and more particularly to a magnetic head having a structure in which a magnetic core is housed in a holder and fixed with synthetic resin.
従来技術
従来のこの種の磁気ヘッドの構造を第1図及び第2図に
示す。Prior Art The structure of a conventional magnetic head of this type is shown in FIGS. 1 and 2.
第1図はコア組立体を説明するもので、このコア組立体
1は左右1対のコア半休2.2を突き合わせてリング状
に形成したもので、コア半休2゜2の先端側にはギャッ
プスペーサ3が介装されており、磁気ギャップを形成し
ている。FIG. 1 explains the core assembly. This core assembly 1 is formed into a ring shape by abutting a pair of left and right core half-holes 2.2, and there is a gap at the tip side of the core half-holes 2.2. A spacer 3 is interposed to form a magnetic gap.
2また、コア半体2,2の基端側にはその突き合わせ部
分を覆うようにして巻線4が施されている。2 Further, a winding 4 is provided on the proximal end sides of the core halves 2, 2 so as to cover the abutting portions thereof.
この巻線4はコア半休2.2の基端側に嵌合されたコイ
ルボビン5に巻かれている。This winding 4 is wound around a coil bobbin 5 fitted on the proximal end side of the core half-hole 2.2.
また、コイルボビン5と一体に接続端子6がモールドさ
れている。このような構造を有するコア組立体1は第2
図に示すホルダT内に嵌合され、樹脂を注入することに
よりホルダT側と一体的に固定される。Further, a connection terminal 6 is molded integrally with the coil bobbin 5. The core assembly 1 having such a structure has a second
It is fitted into the holder T shown in the figure, and is integrally fixed to the holder T side by injecting resin.
尚、第2図に示す例の場合、ホルダTと一体にテープガ
イド8が設けられており、まだホルダ7の側方には取付
脚9が一体的に設けられている。In the case of the example shown in FIG. 2, the tape guide 8 is provided integrally with the holder T, and the mounting legs 9 are still integrally provided on the sides of the holder 7.
ところで、このようにコア組立体をホルダ内に収容し、
溶融した合成樹脂により一体化させる構造を採用すると
注入する合成樹脂の圧力により、コア半体2,2が破損
する事故が生じる。この破損事故はコア半体2の材料と
してフェライトを用いた場合に特に多い。By the way, the core assembly is housed in the holder in this way,
If a structure in which the core halves are integrated using molten synthetic resin is adopted, an accident may occur in which the core halves 2, 2 are damaged due to the pressure of the injected synthetic resin. This damage accident is particularly common when ferrite is used as the material for the core half body 2.
また、注入される合成樹脂の圧力により、ギャップの間
隔が開いてしまうこともある。Furthermore, the gap may become wider due to the pressure of the injected synthetic resin.
このような不都合が生じる原因はコア組立体を固定する
だめの合成樹脂の注入量が多いことと、この樹脂の注入
時の圧力のコントロールが完全に行なわれていないこと
にある。即ち、合成樹脂の注入量は一般的に多めになっ
ている。その理由は合成樹脂の不足やホルダ内における
巣等の発生を防止するためである。The reason for this inconvenience is that a large amount of synthetic resin is injected for fixing the core assembly, and that the pressure at which this resin is injected is not completely controlled. That is, the amount of synthetic resin injected is generally relatively large. The reason for this is to prevent a shortage of synthetic resin and the occurrence of cavities within the holder.
また注入時の圧力のコントロールは注入時に用いられる
金型の構造、樹脂の流動性及び注入圧力が急激に加わる
等の理由から完全に行なうことは不可能である。Furthermore, it is impossible to completely control the pressure during injection due to the structure of the mold used during injection, the fluidity of the resin, and the rapid application of injection pressure.
従って、上述したような樹脂の固化の影響による不都合
はどうしても避けがたいものであるとされていた。Therefore, it has been considered that the above-mentioned problems caused by the solidification of the resin are unavoidable.
目 的
本発明は以上のような事情に鑑み成されたもので、コア
の破損やギャップが開いてしまう等の事故が生じないよ
うに構成した磁気ヘッドを提供することを目的としてい
る。Purpose The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a magnetic head configured to prevent accidents such as core damage and gap opening from occurring.
実施例
以下、図面に示す実施例に基づいて本発明の詳細な説明
する。EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.
第3図及び第4図は本発明の一実施例を説明するもので
、各図中第1図及び第2図と同一部分又は相当する部分
には同一符号を付し、その説明は省略する。3 and 4 illustrate one embodiment of the present invention. In each figure, the same or corresponding parts as in FIGS. 1 and 2 are designated by the same reference numerals, and their explanation will be omitted. .
本実施例にあっては第3図に示すようにコア組立体1を
構成する突き合わされた1組のニア半体2.2間の空間
に弾性体10を設けた構造を採用している。In this embodiment, as shown in FIG. 3, a structure is adopted in which an elastic body 10 is provided in the space between a pair of abutted near halves 2.2 constituting the core assembly 1.
この弾性体10は充分な弾性を有し、外力が加わると体
積変形して収縮する性質を持っている。This elastic body 10 has sufficient elasticity and has the property of deforming its volume and contracting when external force is applied thereto.
材料としては天然ゴム、ウレタンゴム、シリコンゴム、
発泡合成樹脂等が採用される。Materials include natural rubber, urethane rubber, silicone rubber,
Foamed synthetic resin etc. are used.
このようにコア組立体1側に弾性体10を設はニ
た状態でホルダ7内にコア組立体を収容し、溶融した合
成樹脂を注入する場合に、樹脂が必要以上に注入される
と弾性体10が収縮して小さくなり、注入時における圧
力を吸収する。In this way, when the core assembly is housed in the holder 7 with the elastic body 10 installed on the core assembly 1 side and molten synthetic resin is injected, if more resin is injected than necessary, the elastic body The body 10 contracts and becomes smaller to absorb the pressure during injection.
従って樹脂注入時における圧力の変動は弾性体不都合は
生じなくなり、磁気ヘッドの電気的な特性を劣化させる
ことがない。Therefore, fluctuations in pressure during resin injection will not cause problems with the elastic body, and the electrical characteristics of the magnetic head will not deteriorate.
第5図と第6図は合成樹脂封止時の成形時間と磁気コア
部圧力との関係を示したものであり、従来例(第5図)
と本発明例(第6図)とを比較するだめのグラフ図であ
る。Figures 5 and 6 show the relationship between molding time and magnetic core pressure during synthetic resin sealing, and show the conventional example (Figure 5).
FIG. 6 is a graph diagram for comparing the present invention example (FIG. 6) and FIG.
第5,6図においてA及びA′は樹脂注入開始点。In Figures 5 and 6, A and A' are resin injection starting points.
点である。図に示すように磁気コア部にかかる圧力は樹
脂が充填された時点から急激に立上がり、樹脂注入完了
点で最大となる。It is a point. As shown in the figure, the pressure applied to the magnetic core increases rapidly from the time the resin is filled, and reaches its maximum at the point where the resin injection is completed.
従来例を示す第5図では、この圧力がフェライトコアの
抗折強度(F線)以上になるために、フェライト材の磁
気コアにおいてはクラック(割れ)が発生する。In FIG. 5, which shows a conventional example, since this pressure exceeds the bending strength (F line) of the ferrite core, cracks occur in the magnetic core made of ferrite material.
しかし、本発明例を示す第6図では、この圧力がフェラ
イトコアの抗折張度F以下であるために、フェライト材
の磁気コアに悪影響を与えない。However, in FIG. 6, which shows an example of the present invention, this pressure is less than the transverse tensile strength F of the ferrite core, so it does not adversely affect the magnetic core of the ferrite material.
効 果
以上の説明から明らかなように、本発明によればホール
ダ内に収容されるコア組立体側に合成樹脂の注入圧力を
吸収する弾性体を設けた構造を採用しているため、合成
樹脂が注入される際の成形圧力を吸収することができ、
コアの破損やギャップが開いてしまう等の事故が生じる
ことがなく、磁気ヘッドの電気的特性を劣化させないと
いう優れた効果がある。Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which an elastic body is provided on the side of the core assembly housed in the holder to absorb the injection pressure of the synthetic resin, so that the synthetic resin is Can absorb molding pressure when injected,
This has the excellent effect of not causing accidents such as damage to the core or opening of a gap, and not deteriorating the electrical characteristics of the magnetic head.
第1図はコア組立体の斜視図、第2図は完成した磁気ヘ
ッドの斜視図、第3図及び第4図は本発明の一実施例を
説明するもので、第3図はコア組立体の斜視図、第4図
は完成しだ磁気ヘッドの斜視図、第5図は従来構造にお
ける成形時間と磁気コア部圧力との関係を示したグラフ
図、第6図は本発明構造における成形時間と磁気コア部
圧力七の関係を示したグラフ図である。FIG. 1 is a perspective view of a core assembly, FIG. 2 is a perspective view of a completed magnetic head, FIGS. 3 and 4 illustrate an embodiment of the present invention, and FIG. 3 is a perspective view of a core assembly. FIG. 4 is a perspective view of a completed magnetic head, FIG. 5 is a graph showing the relationship between molding time and magnetic core pressure in the conventional structure, and FIG. 6 is the molding time in the structure of the present invention. FIG. 7 is a graph diagram showing the relationship between the magnetic core pressure and the magnetic core pressure.
1・・・コア組立体 2・・・コア半休3・・・ギャッ
プスペーサ
4・・・コイル 5・コイルボビン
6・・・接続端子 7・・・ホルダ
10・・弾性体。DESCRIPTION OF SYMBOLS 1... Core assembly 2... Core half-break 3... Gap spacer 4... Coil 5. Coil bobbin 6... Connection terminal 7... Holder 10... Elastic body.
特許出願人 キャノン電子 株式会社 第1図 第2図 第3図 第4図Patent applicant: Canon Electronics Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4
Claims (2)
固化することによって一体化させる磁気ヘッドにおいて
、前記コア組立体側に体積変形する弾性体を設けたこと
を特徴とする磁気ヘッド。(1) A magnetic head in which a core assembly is housed in a holder and integrated by injecting and solidifying a synthetic resin, characterized in that an elastic body that deforms in volume is provided on the core assembly side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14059983A JPS6032105A (en) | 1983-08-02 | 1983-08-02 | Magnetic head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14059983A JPS6032105A (en) | 1983-08-02 | 1983-08-02 | Magnetic head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6032105A true JPS6032105A (en) | 1985-02-19 |
Family
ID=15272445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14059983A Pending JPS6032105A (en) | 1983-08-02 | 1983-08-02 | Magnetic head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6032105A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108629926A (en) * | 2018-05-10 | 2018-10-09 | 艾体威尔电子技术(北京)有限公司 | A kind of anti-detection implementation method of magnetic head |
-
1983
- 1983-08-02 JP JP14059983A patent/JPS6032105A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108629926A (en) * | 2018-05-10 | 2018-10-09 | 艾体威尔电子技术(北京)有限公司 | A kind of anti-detection implementation method of magnetic head |
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