JPH0510243Y2 - - Google Patents
Info
- Publication number
- JPH0510243Y2 JPH0510243Y2 JP10777585U JP10777585U JPH0510243Y2 JP H0510243 Y2 JPH0510243 Y2 JP H0510243Y2 JP 10777585 U JP10777585 U JP 10777585U JP 10777585 U JP10777585 U JP 10777585U JP H0510243 Y2 JPH0510243 Y2 JP H0510243Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- magnetic
- shield case
- externally induced
- noise
- 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.)
- Expired - Lifetime
Links
- 239000000696 magnetic material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はオーデイオ機器に用いる磁気ヘツドに
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic head used in audio equipment.
第５図ないし第７図はオーデイオ製品、例えば
テープレコーダの録音再生用に用いられる従来の
磁気ヘツドを示し、第５図は斜視図で、図におい
て、１はシールドケースで、このシールドケース
１は磁性材料により角柱状に形成され、磁気テー
プ摺接面に角状の窓部２が穿設されている。第６
図は断面図で、図において、３は磁性材料から成
るほぼコ字状に形成された一対の磁気コア、４は
ボビンで、このボビン４は合成樹脂等により両端
部に端子５を埋設した鍔部４ａを設けて角筒状に
形成され、胴部４ｂにはコイル６が巻回されてい
る。このボビン４に前記磁気コア３の後端部３ａ
の一部を挿入し、両磁気コア３を突き合わせて一
体化し、磁気コア３の先端部にはフロントギヤツ
プ７を形成し、磁気コア３、ボビン４等から成る
組立体を構成している。その後、前記組立体を前
記シールドケース１内に挿入し、樹脂を注入して
乾燥し、磁気テープ摺接面を研摩して磁気ヘツド
を完成している。
5 to 7 show conventional magnetic heads used for recording and reproducing audio products, such as tape recorders. FIG. 5 is a perspective view, and in the figure, 1 is a shield case. It is formed of a magnetic material into a prismatic shape, and a square window portion 2 is bored in the sliding contact surface of the magnetic tape. 6th
The figure is a cross-sectional view, and in the figure, 3 is a pair of magnetic cores made of magnetic material and formed in a substantially U-shape, 4 is a bobbin, and this bobbin 4 has a flange made of synthetic resin or the like with terminals 5 embedded in both ends. It is formed into a rectangular tube shape with a section 4a, and a coil 6 is wound around the body section 4b. The rear end 3a of the magnetic core 3 is attached to the bobbin 4.
A part of the magnetic core 3 is inserted, and both magnetic cores 3 are butted and integrated, a front gap 7 is formed at the tip of the magnetic core 3, and an assembly consisting of the magnetic core 3, bobbin 4, etc. is constructed. Thereafter, the assembly is inserted into the shield case 1, resin is injected and dried, and the magnetic tape sliding surface is polished to complete the magnetic head.
以上のように、従来の磁気ヘツドはフロントギ
ヤツプ７をセンタにして、磁気コア３、コイル６
等の全ての構成部品が左右対称になつていること
から、磁気ヘツドの前方または後方からの外部誘
導磁界は左右の磁気コア３，３に均等に流れて打
ち消され、第７図に示すように、フロントギヤツ
プ７側、および後部ギヤツプ（図示せず）側から
の外部誘導ノイズの影響を少なくしている。した
がつて、図に示すように磁気ヘツド８に対してノ
イズ発生源９が斜め横にある場合は外部誘導ノイ
ズの影響は大きくなる構造となつている。 As described above, the conventional magnetic head has the front gear 7 at the center, the magnetic core 3, and the coil 6.
Since all the components are symmetrical, the externally induced magnetic field from the front or rear of the magnetic head flows equally to the left and right magnetic cores 3, 3 and is canceled out, as shown in Figure 7. , the influence of externally induced noise from the front gear 7 side and the rear gap (not shown) side is reduced. Therefore, as shown in the figure, when the noise source 9 is located obliquely to the side of the magnetic head 8, the influence of externally induced noise becomes greater.
上記のように、従来の磁気ヘツドはフロントギ
ヤツプ７側、および後部ギヤツプ（図示せず）側
からの外部誘導ノイズの影響が最も少なくなる。
しかし、磁気ヘツドをテープレコーダ等に組み込
んだ場合、磁気ヘツドの前方はカセツト挿入口で
あり、通常、ノイズ発生源となるモータ等は、磁
気ヘツド８の斜め方向に設けられている。したが
つて、外部誘導ノイズの影響が大きい条件下で磁
気ヘツド８を取り付けることになり、外部誘導ノ
イズの影響を強く受けるという問題点があつた。
As mentioned above, the conventional magnetic head is least affected by externally induced noise from the front gear 7 side and the rear gear (not shown) side.
However, when the magnetic head is incorporated into a tape recorder or the like, a cassette insertion slot is located in front of the magnetic head, and a motor or the like that is a source of noise is normally installed diagonally toward the magnetic head 8. Therefore, the magnetic head 8 has to be attached under conditions where the influence of externally induced noise is large, resulting in a problem that the magnetic head 8 is strongly influenced by externally induced noise.
本考案の目的は、テープレコーダ等のノイズ発
生源が磁気ヘツドのフロントギヤツプに対して斜
め方向に取り付けられる場合において、磁気ヘツ
ドに外部誘導ノイズの影響を少なくすることにあ
る。 An object of the present invention is to reduce the influence of externally induced noise on a magnetic head when a noise generating source such as a tape recorder is mounted obliquely to the front gap of the magnetic head.
上記のような問題点を解決するために、本考案
の磁気ヘツドではシールドケースの媒体摺接面の
一部に凸部を設けて左右非対称とし、この凸部を
ノイズ発生方向に対応させた。
In order to solve the above-mentioned problems, in the magnetic head of the present invention, a convex portion is provided on a part of the medium sliding contact surface of the shield case to make it asymmetrical, and the convex portion is made to correspond to the direction of noise generation.
本考案の磁気ヘツドでは、外部誘導ノイズの指
向性がノイズ発生源方向に変り、ノイズ発生源方
向からの外部誘導磁界の影響が減少する。
In the magnetic head of the present invention, the directivity of externally induced noise changes toward the noise source, reducing the influence of the externally induced magnetic field from the direction of the noise source.
以下に本考案の詳細を図示した実施例により説
明する。
The details of the invention will be explained below with reference to illustrated embodiments.
第１図ないし第４図は本考案の磁気ヘツドの一
実施例を示し、第１図は斜視図である。図におい
て、１１はシールドケースで、このシールドケー
ス１１は磁性材料により角柱状に形成され、上面
の磁気テープ摺接面に正方形状の窓部１２と、金
型のノツチを調整してシールドケース１の加工時
に一体形成されたクサビ状の凸部１３とが設けら
れている。 1 to 4 show an embodiment of the magnetic head of the present invention, and FIG. 1 is a perspective view. In the figure, reference numeral 11 denotes a shield case. This shield case 11 is made of a magnetic material and is formed into a prismatic shape, and has a square window 12 on the upper magnetic tape sliding contact surface and a notch of the mold that is adjusted to form the shield case 11. A wedge-shaped protrusion 13 is provided which is integrally formed during processing.
第２図は断面図で、図において、１４は合成樹
脂等により角筒状に形成されたボビンで、両端部
に棒状の端子１５を埋設した鍔部１４ａを有して
いる。またボビン１４の胴部１４ｂにはコイル１
６が巻回されている。このボビン１４に磁性材料
にてほぼコ字状に形成された一対の磁気コア１７
の後端部１７ａの一部を鍔部１４ａから挿入し、
後部ギヤツプ（図示せず）とフロントギヤツプ１
８とを形成して組立体を構成している。この組立
体を前記シールドケース１１の窓部１２に磁気コ
ア１７のフロントギヤツプ１８を露出させて挿入
した後に、樹脂を注入している。 FIG. 2 is a cross-sectional view, and in the figure, 14 is a bobbin made of synthetic resin or the like in the shape of a rectangular cylinder, and has a flange 14a in which rod-shaped terminals 15 are embedded at both ends. Further, the body 14b of the bobbin 14 has a coil 1.
6 is wound. A pair of magnetic cores 17 formed in a substantially U-shape from a magnetic material on the bobbin 14.
Insert a part of the rear end 17a from the collar 14a,
Rear gear (not shown) and front gear 1
8 to form an assembly. After this assembly is inserted into the window 12 of the shield case 11 with the front gap 18 of the magnetic core 17 exposed, resin is injected.
次いで、第３図に示すように、磁気ヘツドのフ
ロントギヤツプ１８に対してＡ−A′線に沿つて
非対称となるように磁気テープ摺接面を研摩して
磁気ヘツドを形成している。 Next, as shown in FIG. 3, the magnetic tape sliding surface is polished so as to be asymmetrical along line A--A' with respect to the front gap 18 of the magnetic head to form a magnetic head.
なお、シールドケース１１の磁気テープ摺接面
に設ける凸部１３は、フロントギヤツプ１８に対
して必要に応じて左右どちらに形成してもよい。 The convex portion 13 provided on the magnetic tape sliding surface of the shield case 11 may be formed on either the left or right side of the front gap 18 as required.
第４図は本考案の磁気ヘツドの外部誘導磁界の
指向性を示し、１９は磁気ヘツドで、シールドケ
ース１１の凸部１３を設けた方向またはその反対
方向からの外部誘導磁界の影響が最小となつてい
る。これは、凸部１３を設けることによりシール
ドケース１１が左右非対称となり、かつ、凸部１
３側のシールド効果が増すためである。したがつ
て、この磁気ヘツドをテープレコーダ等に組み込
んだ場合、第４図に示すように、シールドケース
１１の凸部１３方向にあるノイズ発生源２０の外
部誘導ノイズの影響を少なくすることができる。 FIG. 4 shows the directivity of the externally induced magnetic field of the magnetic head of the present invention, where 19 is a magnetic head, and the influence of the externally induced magnetic field from the direction in which the protrusion 13 of the shielding case 11 is provided or the opposite direction is minimal. It's summery. This is because the shield case 11 becomes asymmetrical by providing the protrusion 13, and the protrusion 1
This is because the shielding effect on the third side increases. Therefore, when this magnetic head is incorporated into a tape recorder or the like, the influence of externally induced noise from the noise source 20 in the direction of the convex portion 13 of the shield case 11 can be reduced, as shown in FIG. .
なお、前記凸部１３の形成位置またはその突出
量を変えることにより、外部誘導磁界の指向性を
任意に変更することができる。 Note that by changing the formation position of the convex portion 13 or the amount of protrusion thereof, the directivity of the externally induced magnetic field can be arbitrarily changed.
上記のように、本考案の磁気ヘツドによれば、
シールドケースの媒体摺接面の一部に凸部を設け
て左右非対称とし、この凸部をノイズ発生源方向
に対応させたことから、外部誘導磁界の指向性を
変えることができ、外部誘導ノイズの影響の少な
い磁気ヘツドを提供することができる。
As mentioned above, according to the magnetic head of the present invention,
A convex part is provided on a part of the media sliding surface of the shield case to make it asymmetrical, and this convex part corresponds to the direction of the noise generation source, so the directivity of the externally induced magnetic field can be changed, reducing externally induced noise. It is possible to provide a magnetic head that is less affected by
第１図は本考案の一実施例を示す磁気ヘツドの
斜視図、第２図は第１図に示した磁気ヘツドの断
面図、第３図は第１図に示した磁気ヘツドの研摩
位置を示す断面図、第４図は第１図に示した磁気
ヘツドの外部誘導磁界の指向性を示す図、第５図
は従来の磁気ヘツドの斜視図、第６図は第５図に
示した磁気ヘツドの断面図、第７図は第５図に示
した磁気ヘツドの外部誘導磁界の指向性を示す図
である。
図において、１１……シールドケース、１２…
…窓部、１４……ボビン、１５……端子、１６…
…コイル、１７……磁気コア、１８……フロント
ギヤツプ、１９……磁気ヘツド、２０……ノイズ
発生源である。
Fig. 1 is a perspective view of a magnetic head showing an embodiment of the present invention, Fig. 2 is a sectional view of the magnetic head shown in Fig. 1, and Fig. 3 shows the polishing position of the magnetic head shown in Fig. 1. FIG. 4 is a diagram showing the directivity of the externally induced magnetic field of the magnetic head shown in FIG. 1, FIG. 5 is a perspective view of a conventional magnetic head, and FIG. A sectional view of the head, FIG. 7, is a diagram showing the directivity of the externally induced magnetic field of the magnetic head shown in FIG. 5. In the figure, 11...shield case, 12...
...Window, 14...Bobbin, 15...Terminal, 16...
... Coil, 17 ... Magnetic core, 18 ... Front gap, 19 ... Magnetic head, 20 ... Noise generation source.
Claims (1)
のコアをシールドケースに収納して成る磁気ヘツ
ドにおいて、 前記シールドケースの媒体摺接面の一部に凸部
を設けて左右非対称とし、この凸部をノイズ発生
源方向に対応させたことを特徴とする磁気ヘツ
ド。[Claims for Utility Model Registration] A magnetic head comprising a pair of substantially U-shaped cores with a coil attached thereto and the cores housed in a shield case, wherein a convex portion is formed on a part of the medium sliding surface of the shield case. What is claimed is: 1. A magnetic head, characterized in that the head is asymmetrical in left and right directions, and the convex portion corresponds to the direction of the noise source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10777585U JPH0510243Y2 (en) | 1985-07-15 | 1985-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10777585U JPH0510243Y2 (en) | 1985-07-15 | 1985-07-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6218811U JPS6218811U (en) | 1987-02-04 |
| JPH0510243Y2 true JPH0510243Y2 (en) | 1993-03-12 |
Family
ID=30984363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10777585U Expired - Lifetime JPH0510243Y2 (en) | 1985-07-15 | 1985-07-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510243Y2 (en) |
-
1985
- 1985-07-15 JP JP10777585U patent/JPH0510243Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6218811U (en) | 1987-02-04 |
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