JPH0774031A - Ferrite core and bobbin - Google Patents
Ferrite core and bobbinInfo
- Publication number
- JPH0774031A JPH0774031A JP24069893A JP24069893A JPH0774031A JP H0774031 A JPH0774031 A JP H0774031A JP 24069893 A JP24069893 A JP 24069893A JP 24069893 A JP24069893 A JP 24069893A JP H0774031 A JPH0774031 A JP H0774031A
- Authority
- JP
- Japan
- Prior art keywords
- foot
- bobbin
- section
- ferrite core
- cross
- 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.)
- Granted
Links
Landscapes
- Insulating Of Coils (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、インバータ等に使用さ
れる薄型トランス用フェライトコア及びそのボビンに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ferrite core for a thin transformer used in an inverter or the like and a bobbin thereof.
【0002】[0002]
【従来の技術】従来、この種の薄型トランス用フェライ
トコアは、図4及び図5に示すような構造であって、コ
イル巻線部11のようにコイルがコア下面より露出する
ため、磁束が漏れやすく、トランスの特性を劣化させる
欠点となっていた。又、ボビンの端子は、従来、図6に
示すように、鍔両端にコイル引き出し線からげ用端子ピ
ン13及び基板取り付け用端子ピン14を有する構造で
あり、コイルがコア下面に露出しないと配線上、不都合
となる構造となっているため、コアのデザインを制限す
る原因となっていた。2. Description of the Related Art Conventionally, this type of thin transformer ferrite core has a structure as shown in FIGS. 4 and 5, and since the coil is exposed from the lower surface of the core like the coil winding portion 11, a magnetic flux is generated. It was liable to leak and was a drawback that deteriorated the characteristics of the transformer. Further, the bobbin terminal conventionally has a structure having a coil lead-out terminal pin 13 and a board mounting terminal pin 14 at both ends of a collar as shown in FIG. In addition, since the structure is inconvenient, it has been a cause of limiting the core design.
【0003】[0003]
【発明が解決しようとする課題】本発明は、これらの欠
点を除去するため、フェライトコア及びボビンの構造を
改良したものであり、漏れ磁束の少ない薄型のトランス
を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to improve the structure of a ferrite core and a bobbin in order to eliminate these drawbacks, and an object thereof is to provide a thin transformer having a small leakage flux.
【0004】[0004]
【課題を解決するための手段】第一の発明は、ヨークと
該ヨークより延びる断面が偏平状の中足と前記ヨークよ
り延び前記中足を囲むように配置される複数本の外足よ
りなり、前記複数の外足の所定の外足下部は偏平状断面
を有し、該断面の長軸は前記中足の断面の長軸と略平行
で、前記中足の断面の長軸より短く、且つ前記外足下部
の断面の中心と前記中足の断面の中心とは、ほぼ前記中
足の断面の長軸に垂直な同一直線上に位置するフェライ
トコアであって、前記中足と前記外足で規制される前記
中足への巻線が可能な領域は、前記中足よりみた前記外
足の外側を結んでできる領域内にあるように構成したフ
ェライトコアである。第二の発明は、前記のフェライト
コアを実装するボビンであって、前記のフェライトコア
を仕切る両端の鍔及び前記の巻線を仕切る鍔の、前記フ
ェライトコアの前記外足下部の両端部と対応する位置に
端子ピンを設けたボビンである。According to a first aspect of the present invention, there is provided a yoke, a flat leg whose cross section extends from the yoke, and a plurality of outer legs which extend from the yoke and surround the mid leg. , A predetermined lower part of the outer foot of the plurality of outer feet has a flat cross section, the long axis of the cross section is substantially parallel to the long axis of the cross section of the middle foot, shorter than the long axis of the cross section of the middle foot, Further, the center of the cross section of the lower part of the outer foot and the center of the cross section of the middle foot are ferrite cores located substantially on the same straight line perpendicular to the long axis of the cross section of the middle foot, and the middle foot and the outer foot The area where the winding of the middle foot is possible, which is restricted by the foot, is a ferrite core configured so as to be within the area formed by connecting the outside of the outer foot as viewed from the middle foot. A second aspect of the present invention is a bobbin for mounting the above ferrite core, which corresponds to both ends of the flange for partitioning the ferrite core and the flange for partitioning the winding, which are located at the lower end of the outer foot of the ferrite core. The bobbin is provided with a terminal pin at a position to be used.
【0005】[0005]
【作用】フェライトコアにおいては、フェライトコアの
下面左右にコイルの端部を引き出す切り欠き溝を設け、
又、コイル下面もコアで囲う構成とすることで、更にボ
ビンについては、ボビン端子ピンの位置及び形状を変え
ることで、コイルがコアの下面に露出するのを防止し、
薄型トランスの漏れ磁束を少なくできる。[Function] In the ferrite core, cutout grooves for drawing out the end of the coil are provided on the left and right sides of the lower surface of the ferrite core,
In addition, the coil lower surface is also surrounded by the core, and for the bobbin, the position and shape of the bobbin terminal pin are changed to prevent the coil from being exposed on the lower surface of the core.
The leakage flux of the thin transformer can be reduced.
【0006】[0006]
【実施例】以下に本発明に係る実施例を図面を使用して
説明する。図1は、本発明によるフェライトコアの構造
を示す図である。図1(a)は平面図であり、図1
(b)は正面図であり、図1(c)は側面図である。コ
アは、中足3、外足下部1、外足上部4、コイル引き出
しのためのコア下部切り欠き溝2、及びコア上部切り欠
き溝5で構成される。図2は、図1のフェライトコアを
ペアで組み合わせた時の斜視図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a structure of a ferrite core according to the present invention. FIG. 1A is a plan view.
1B is a front view, and FIG. 1C is a side view. The core is composed of a middle foot 3, an outer foot lower portion 1, an outer foot upper portion 4, a core lower cutout groove 2 for drawing out a coil, and a core upper cutout groove 5. FIG. 2 is a perspective view when the ferrite cores of FIG. 1 are combined in pairs.
【0007】図3は、本発明によるボビンの斜視図であ
る。コイル引き出し線からげ用端子ピン8,基板取り付
け用端子ピン9が、ボビン両端のコア仕切り鍔6及びコ
イル仕切り鍔7の下部左右に設けられている。コイル引
き出し線からげ用端子ピン8と基板取り付け用端子ピン
9が一体となっており、コイル引き出し線からげ用端子
ピン8にはコイル巻線端末を接続し、基板取り付け用端
子ピン9はプリント基板に面実装できる構造となってい
る。ボビンの両端のコア仕切り鍔6及びコイル仕切り鍔
7下部に設けたコイル引き出し線からげ用端子ピン8及
び基板取り付け用端子ピン9は、トランスを組み立てた
時、コア下部切り欠き溝より露出する構造となってい
る。FIG. 3 is a perspective view of a bobbin according to the present invention. A coil lead wire stripping terminal pin 8 and a board mounting terminal pin 9 are provided on the lower left and right sides of the core partition collar 6 and the coil partition collar 7 at both ends of the bobbin. The coil lead-out wire stripping terminal pin 8 and the board mounting terminal pin 9 are integrated. The coil winding terminal is connected to the coil lead-out wire stripping terminal pin 8, and the board mounting terminal pin 9 is printed. It has a structure that can be surface-mounted on a board. The structure is such that the coil lead-out terminal pin 8 and the board mounting terminal pin 9 provided under the core partition flange 6 and the coil partition flange 7 at both ends of the bobbin are exposed from the core lower cutout groove when the transformer is assembled. Has become.
【0008】従来の薄型コアは、図4、図5のコイル巻
線部11のように、コイルがコア下面より露出していた
が、本発明では、図1の外足下部によりコイル下面をコ
アで囲う構造となっており、又、コア下部切り欠き溝2
の端面よりコイルが露出しない構造となっている。これ
により漏れ磁束を少なくすることができる。In the conventional thin core, the coil is exposed from the lower surface of the core as in the coil winding portion 11 of FIGS. 4 and 5, but in the present invention, the lower surface of the coil is formed by the lower portion of the outer foot of FIG. It has a structure surrounded by, and also the core lower cutout groove 2
The structure is such that the coil is not exposed from the end face. Thereby, the leakage magnetic flux can be reduced.
【0009】更に、図1のコア上面切り欠き溝5は、ボ
ビンの端子に配線できない太い線を配線する場合使用す
るためのものであり、使用しない場合には特になくても
差し支えない。Further, the core upper surface cutout groove 5 of FIG. 1 is used for wiring a thick wire that cannot be wired to the terminal of the bobbin, and may be omitted if not used.
【0010】コアの断面積は、中足と外足を同一面積と
するのが効率的な方法であるが、外足は、従来、外足1
2の二箇所であったのが、図1の外足下部1,外足上部
4の三箇所となるため、同じ面積でもコアの外周を小さ
くできるという利点もある。As for the cross-sectional area of the core, it is an efficient method to make the middle foot and the outer foot have the same area.
Since there are two locations of 2 and three locations of the outer foot lower portion 1 and the outer foot upper portion 4 of FIG. 1, there is also an advantage that the outer circumference of the core can be made small even with the same area.
【0011】又、ボビンの構造は、図3に示すように、
コイル引き出し線からげ用端子ピン8及び基板取り付け
用端子ピン9をボビンの両端のコア仕切り鍔6だけでな
く、コイル仕切り鍔7にも設けることで、複数のコイル
の配線ができるようになっている。加えて、基板取り付
け用端子ピン9は、表面実装のため折り曲げた構造とし
ているが、インサートタイプとするために折り曲げず、
直線状とできることは言うまでもない。又、コイル引き
出し線からげ用端子ピン8は、コア下面よりわずかには
み出す構造とすることで、トランス全体の高さをおさえ
ることができる。又、ボビンにおけるコア上部切り欠き
溝カバー部10は、高圧のトランスの場合に設けた方が
絶縁耐圧の点で有利であり、そうでない場合には特に設
けなくても差し支えない。The structure of the bobbin is as shown in FIG.
By providing the coil lead-out terminal pin 8 and the board mounting terminal pin 9 not only on the core partition flanges 6 at both ends of the bobbin but also on the coil partition flanges 7, a plurality of coils can be wired. There is. In addition, the board mounting terminal pin 9 has a bent structure for surface mounting, but is not bent for being an insert type.
It goes without saying that it can be straight. Further, the coil lead wire pin-breaking terminal pin 8 has a structure slightly protruding from the lower surface of the core, whereby the height of the entire transformer can be suppressed. Further, the core upper cutout groove cover portion 10 in the bobbin is more advantageous in terms of withstand voltage when provided in the case of a high-voltage transformer, and may be omitted if not provided otherwise.
【0012】なお、本発明は、冷陰極インバータトラン
ス等のコイル端末が多く、薄型を求めるトランス等にも
応用できる。The present invention has many coil terminals such as a cold cathode inverter transformer and can be applied to a transformer or the like which requires a thin type.
【0013】[0013]
【発明の効果】以上述べたごとく、本発明によれば、漏
れ磁束の少ない、効率の高い利点をもったフェライトコ
ア及びボビンの提供が可能となった。As described above, according to the present invention, it is possible to provide a ferrite core and a bobbin which have the advantages of low leakage flux and high efficiency.
【図1】本発明によるフェライトコアの構造を示す図。
図1(a)は平面図、図1(b)は正面図、図1(c)
は側面図。FIG. 1 is a diagram showing a structure of a ferrite core according to the present invention.
1A is a plan view, FIG. 1B is a front view, and FIG.
Is a side view.
【図2】図1のフェライトコアをペアで組み合わせた時
の斜視図。FIG. 2 is a perspective view when the ferrite cores of FIG. 1 are combined in pairs.
【図3】本発明によるボビンの外観斜視図。FIG. 3 is an external perspective view of a bobbin according to the present invention.
【図4】従来のフェライトコアの構造を示す図。図4
(a)は平面図、図4(b)は正面図。FIG. 4 is a diagram showing a structure of a conventional ferrite core. Figure 4
4A is a plan view and FIG. 4B is a front view.
【図5】従来のフェライトコアの構造を示す図。図5
(a)は平面図、図5(b)は正面図。FIG. 5 is a diagram showing a structure of a conventional ferrite core. Figure 5
5A is a plan view and FIG. 5B is a front view.
【図6】従来のボビンの外観斜視図。FIG. 6 is an external perspective view of a conventional bobbin.
1 外足下部 2 コア下部切り欠き溝 3 中足 4 外足上部 5 コア上部切り欠き溝 6 コア仕切り鍔 7 コイル仕切り鍔 8,13 コイル引き出し線からげ用端子ピン 9,14 基板取り付け用端子ピン 10 コア上部切り欠き溝カバー部 11 コイル巻線部 12 外足 1 Lower part of outer foot 2 Core notch groove 3 Middle foot 4 Upper part of outer foot 5 Core upper notch groove 6 Core partition flange 7 Coil partition flange 8,13 Coil lead wire peg terminal pin 9,14 Board mounting terminal pin 10 core upper notch groove cover part 11 coil winding part 12 outer leg
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 H01F 27/255 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location H01F 27/255
Claims (2)
状の中足と前記ヨークより延び前記中足を囲むように配
置される複数本の外足よりなり、前記複数本の外足の所
定の外足下部は偏平状の断面を有し、該断面の長軸は前
記中足の断面の長軸と略平行で、前記中足の断面の長軸
より短く、且つ前記外足下部の断面の中心と前記中足の
断面の中心とは、ほぼ前記中足の断面の長軸に垂直な同
一直線上に位置するフェライトコアであって、前記中足
と前記外足で規制される前記中足への巻線が可能な領域
は、前記中足よりみた前記外足の外側を結んでできる領
域内にあるように構成したことを特徴とするフェライト
コア。1. A yoke and a plurality of outer legs extending from the yoke and having a flat cross-section extending from the yoke and surrounding the middle leg, and a predetermined one of the plurality of outer legs. The lower part of the outer foot has a flat cross section, and the long axis of the cross section is substantially parallel to the long axis of the cross section of the middle foot, is shorter than the long axis of the cross section of the middle foot, and has a cross section of the lower part of the outer foot. The center and the center of the cross section of the middle foot are ferrite cores located substantially on the same straight line perpendicular to the long axis of the cross section of the middle foot, and the middle foot regulated by the middle foot and the outer foot. The ferrite core is characterized in that the region capable of winding the wire is located within a region formed by connecting the outer side of the outer foot as viewed from the middle leg.
るボビンであって、前記のフェライトコアを仕切る両端
の鍔及び前記の巻線を仕切る鍔の、前記フェライトコア
の前記外足下部の両端部と対応する位置に端子ピンを設
けたことを特徴とするボビン。2. The bobbin for mounting the ferrite core according to claim 1, wherein both ends of the flange for partitioning the ferrite core and the flange for partitioning the winding are located under the outer foot of the ferrite core. A bobbin characterized in that a terminal pin is provided at a position corresponding to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24069893A JP3429818B2 (en) | 1993-08-31 | 1993-08-31 | Ferrite core and bobbin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24069893A JP3429818B2 (en) | 1993-08-31 | 1993-08-31 | Ferrite core and bobbin |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0774031A true JPH0774031A (en) | 1995-03-17 |
JP3429818B2 JP3429818B2 (en) | 2003-07-28 |
Family
ID=17063375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24069893A Expired - Fee Related JP3429818B2 (en) | 1993-08-31 | 1993-08-31 | Ferrite core and bobbin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3429818B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112262447A (en) * | 2018-06-08 | 2021-01-22 | 法雷奥电机控制系统公司 | Component forming at least two inductors |
-
1993
- 1993-08-31 JP JP24069893A patent/JP3429818B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112262447A (en) * | 2018-06-08 | 2021-01-22 | 法雷奥电机控制系统公司 | Component forming at least two inductors |
CN112262447B (en) * | 2018-06-08 | 2022-08-09 | 法雷奥电机控制系统公司 | Component forming at least two inductors |
Also Published As
Publication number | Publication date |
---|---|
JP3429818B2 (en) | 2003-07-28 |
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