JP2006237203A - Winding component with cover - Google Patents

Winding component with cover Download PDF

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Publication number
JP2006237203A
JP2006237203A JP2005048538A JP2005048538A JP2006237203A JP 2006237203 A JP2006237203 A JP 2006237203A JP 2005048538 A JP2005048538 A JP 2005048538A JP 2005048538 A JP2005048538 A JP 2005048538A JP 2006237203 A JP2006237203 A JP 2006237203A
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Prior art keywords
cover
bobbin
winding
terminal mounting
mounting portion
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JP4557254B2 (en
Inventor
Takeshi Iketani
剛 池谷
Masami Miyamoto
正実 宮本
Yuji Ida
祐二 井田
Akihiro Fujii
明寛 藤井
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FDK Corp
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FDK Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce the height and a mounting area of a winding component with a cover while at the same time keeping a high electric insulation property thereof. <P>SOLUTION: The winding component with a cover comprises: a plurality of L-shaped pin terminals 24 which are mounted on a terminal mounting portion 22 of a bobbin 10, with a horizontal portion of each L-shaped pin terminal arranged on the terminal mounting portion and a vertical portion extended through the terminal mounting portion; a coil 14 which is such that a winding is wound around the winding core 20 of the bobbin; a cover 16 for covering at least the upper part of the terminal mounting portion of the bobbin; and a magnetic core 18 partially inserted into the winding core. On the outer flange surface of the winding core between the pin terminals on the terminal mounting portion of the bobbin, projections 32 are formed. The cover is formed with an inner insulation wall 34 which faces the outer flange surface of the winding core, and recesses 36 which are engaged with the projections are formed in the inner insulation wall. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、トランスやコイルなどとして用いるカバー付き巻線部品に関し、更に詳しく述べると、ボビンの端子取付部に複数のL型のピン端子を装着し、巻芯部に巻線が施されるコイルと、端子取付部上でピン端子を覆うカバーと、磁気コアを備えた巻線部品に関するものである。   The present invention relates to a winding component with a cover used as a transformer, a coil, and the like. More specifically, a coil in which a plurality of L-shaped pin terminals are mounted on a terminal mounting portion of a bobbin and winding is applied to a winding core portion. And a cover covering the pin terminal on the terminal mounting portion, and a winding component including a magnetic core.

例えばプラズマディスプレイ装置や液晶ディスプレイ装置などでは、ピン端子タイプの電源用トランスやチョークコイルが用いられているが、それらの巻線部品について、小型化、薄型化の要望がますます大きくなっている。そこで、磁気コアとピン端子との間の電気絶縁性を向上させるため、カバー付きの構造が採用されている。   For example, in plasma display devices and liquid crystal display devices, pin terminal type power transformers and choke coils are used. However, there is an increasing demand for smaller and thinner winding parts. Therefore, a structure with a cover is employed to improve the electrical insulation between the magnetic core and the pin terminal.

従来のこの種のカバー付き巻線部品は、ボビンの端子取付部に複数のピン端子が装着されると共に巻芯部に巻線が施されるコイルと、ボビンの少なくとも端子取付部上を覆うカバーと、巻芯部に一部が挿入される磁気コアを備えた構造である。ここで、各ピン端子はL型に折り曲げられた形状をなし、その水平部分が端子取付部上に位置し、垂直部分が端子取付部を貫通するように装着される。カバーは、電気絶縁性を有する樹脂からなり、ピン端子の折り曲げ部と磁気コアとの間の絶縁性を確保するために設けられている(特許文献1など参照)。例えば、ピン端子の折り曲げ部と磁気コアとの距離を確保するために、ボビンの内側に溝を設け、カバー側にはその溝に嵌合する絶縁壁を設けるなどの構造が採用されている。しかし、このような構造は非常に複雑であり、横方向にスライドさせなければボビンに装着できず、従って片側にしか取り付けられないため、用途が限定される。もし、両側に取り付けようとすると、カバーは分割構造とならざるをえない。   Conventional winding parts with a cover of this type include a coil in which a plurality of pin terminals are mounted on the terminal mounting portion of the bobbin and a winding is applied to the winding core portion, and a cover that covers at least the terminal mounting portion of the bobbin. And a structure having a magnetic core partially inserted into the winding core. Here, each pin terminal has a shape bent into an L shape, and is mounted so that the horizontal portion thereof is positioned on the terminal mounting portion and the vertical portion penetrates the terminal mounting portion. The cover is made of a resin having electrical insulation, and is provided to ensure insulation between the bent portion of the pin terminal and the magnetic core (see Patent Document 1, etc.). For example, in order to secure the distance between the bent portion of the pin terminal and the magnetic core, a structure is adopted in which a groove is provided on the inner side of the bobbin and an insulating wall that fits into the groove is provided on the cover side. However, such a structure is very complicated, and can only be attached to the bobbin if it is not slid laterally, so that it can only be attached to one side, thus limiting its application. If it is to be installed on both sides, the cover must be divided.

そこで、より簡素化された構造のカバーが提案された。これは、仕切り壁となる水平状の天板部が磁気コアに接し、且つ天板部の端面がボビンに衝合する構造である。この場合には、天板部とボビンとの衝合位置とピン端子との直線距離が絶縁距離となる。従って、絶縁距離を稼ぐためには、ピン端子と磁気コアとの高さをある程度大きくするか、あるいは天板部とボビンとの衝合位置とピン端子との水平方向の距離をある程度大きくする必要がある。そのため、カバー付き巻線部品としての低背化あるいは実装面積の縮小化が難しい。   Therefore, a cover with a simplified structure was proposed. This is a structure in which a horizontal top plate portion serving as a partition wall is in contact with a magnetic core, and an end surface of the top plate portion abuts on a bobbin. In this case, the insulation distance is the linear distance between the abutting position of the top plate portion and the bobbin and the pin terminal. Therefore, in order to increase the insulation distance, it is necessary to increase the height between the pin terminal and the magnetic core to some extent, or to increase the horizontal distance between the contact position between the top plate and the bobbin and the pin terminal to some extent. There is. For this reason, it is difficult to reduce the height or reduce the mounting area as a winding component with a cover.

また、巻線作業は、ボビンを巻線機に装着して自動的に行うが、その際、ボビンにはかなり大きな力が加わる。そのため、各部の肉厚を全体的にある程度大きくして機械的強度を高めており、ボビンの小型化、薄型化が難しくなっている。
特開平11−297535号公報
In addition, the winding work is automatically performed by attaching the bobbin to the winding machine, and at that time, a considerable force is applied to the bobbin. Therefore, the thickness of each part is increased to some extent as a whole to increase the mechanical strength, making it difficult to reduce the size and thickness of the bobbin.
JP-A-11-297535

本発明が解決しようとする課題は、高い電気絶縁性を維持しつつ、カバー付き巻線部品の低背化あるいは実装面積の縮小化ができるようにすることである。   The problem to be solved by the present invention is to make it possible to reduce the height or reduce the mounting area of the winding component with cover while maintaining high electrical insulation.

本発明は、ボビンの端子取付部に複数のL型のピン端子を、その水平部分が該端子取付部上に位置し、垂直部分が端子取付部を貫通するように装着すると共に、ボビンの巻芯部に巻線が施されるコイルと、ボビンの少なくとも端子取付部上を覆うカバーと、巻芯部に一部が挿入される磁気コアを備えたカバー付き巻線部品において、ボビンの端子取付部上のピン端子間位置で且つ巻芯部の外側フランジ面に突条を形成すると共に、該巻芯部の外側フランジ面に対向するようにカバーに内側絶縁壁を設け、該内側絶縁壁に前記突条に嵌り合う溝を形成したことを特徴とするカバー付き巻線部品である。   The present invention mounts a plurality of L-shaped pin terminals on the terminal mounting portion of the bobbin such that the horizontal portion is positioned on the terminal mounting portion and the vertical portion penetrates the terminal mounting portion, and the bobbin winding Bobbin terminal mounting in a coiled part with a coil that has a winding around the core, a cover that covers at least the terminal mounting part of the bobbin, and a magnetic core that is partially inserted into the winding core A protrusion is formed on the outer flange surface of the core portion at a position between the pin terminals on the portion, and an inner insulating wall is provided on the cover so as to face the outer flange surface of the core portion. A grooved part with a cover, wherein a groove that fits into the protrusion is formed.

カバーは、電気絶縁性を有する合成樹脂の成形品である。例えば、端子取付部上を覆う本体部のみの構造でもよいが、端子取付部上を覆う本体部と、該本体部から立ち上がりコイル側面を覆う周壁部とが一体に成形された構造でもよい。   The cover is a molded product of a synthetic resin having electrical insulation. For example, a structure having only a main body covering the terminal mounting portion may be used, but a main body covering the terminal mounting portion and a peripheral wall portion covering the side surface of the rising coil from the main body may be integrally formed.

本発明に係るカバー付き巻線部品は、ボビン巻芯部の外側フランジ面に対向するようにカバーに内側絶縁壁を設けた構造であるので、磁気コアとピン端子との絶縁距離を前記内側絶縁壁に沿う分だけ長くでき、そのため高い電気絶縁性を維持しつつ、カバー付き巻線部品を低背化できる。低背化しない場合には、実装面積の縮小化が可能である。   Since the winding component with a cover according to the present invention has a structure in which an inner insulating wall is provided on the cover so as to face the outer flange surface of the bobbin winding core portion, the insulating distance between the magnetic core and the pin terminal is the inner insulating wall. The length along the wall can be increased, so that the height of the covered winding part can be reduced while maintaining high electrical insulation. If the height is not reduced, the mounting area can be reduced.

また、本発明に係るカバー付き巻線部品では、ボビンの端子取付部上のピン端子間位置で且つ巻芯部の外側フランジ面に突条を形成したことにより、ボビン巻芯部の肉厚を薄くし小型化・軽量化を図っているにもかかわらず機械的強度を向上でき、巻線時に加わる力による割れを防止できる。また、前記突条に嵌り合う溝をカバーの内側絶縁壁に形成したことにより、カバーの強度増強とカバー付き巻線部品の小型化を図ることができる。   Further, in the winding component with a cover according to the present invention, the protrusions are formed on the outer flange surface of the core portion at the position between the pin terminals on the terminal mounting portion of the bobbin, so that the thickness of the bobbin core portion is increased. The mechanical strength can be improved despite the reduction in thickness and size and weight, and cracking due to the force applied during winding can be prevented. In addition, since the groove that fits into the protrusion is formed in the inner insulating wall of the cover, the strength of the cover can be increased and the size of the coiled part with cover can be reduced.

図1は、本発明に係るカバー付き巻線部品の一実施例を示す概略図であり、Aは組み立て前の状態を、Bは組み立て後の状態を、それぞれ示している。このカバー付き巻線部品は、ボビン10に巻線12を施したコイル14と、該コイル14を覆うカバー16、及び一対の磁気コア18から構成される。   FIG. 1 is a schematic view showing an embodiment of a winding component with a cover according to the present invention, in which A shows a state before assembly and B shows a state after assembly. The winding component with a cover includes a coil 14 having a bobbin 10 with a winding 12, a cover 16 covering the coil 14, and a pair of magnetic cores 18.

ボビン10は合成樹脂の一体成形品であり、両側にフランジを有する巻芯部20の両側下部(フランジ下部)に端子取付部22が設けられ、該端子取付部22に複数のL型のピン端子24を装着した構造である。各ピン端子24は、その水平部分が端子取付部22上に位置し、垂直部分が端子取付部22を貫通するように固着される。このボビン10の巻芯部20に所定の巻線12が施され、コイル14を構成する。カバー16は、前記ボビン10の少なくとも端子取付部22上を覆うものであり、ここでは端子取付部22上を覆う本体部26と、該本体部26から立ち上がりコイル側面を覆う周壁部28とが、電気絶縁性樹脂で一体に成形された構造をなしている。コイル14とカバー16の組み合わせ構造を図2に示す。   The bobbin 10 is an integrally molded product of synthetic resin. Terminal mounting portions 22 are provided on both lower portions (lower flange portions) of the core portion 20 having flanges on both sides, and a plurality of L-shaped pin terminals are provided on the terminal mounting portions 22. 24 is mounted. Each pin terminal 24 is fixed so that its horizontal portion is located on the terminal mounting portion 22 and its vertical portion penetrates the terminal mounting portion 22. A predetermined winding 12 is applied to the core 20 of the bobbin 10 to form a coil 14. The cover 16 covers at least the terminal attachment portion 22 of the bobbin 10, and here, a main body portion 26 covering the terminal attachment portion 22 and a peripheral wall portion 28 covering the side surface of the rising coil from the main body portion 26, It has a structure that is integrally molded with an electrically insulating resin. A combined structure of the coil 14 and the cover 16 is shown in FIG.

両方の磁気コア18は、同形状の変形E型コアであり、それらの中央脚部18aがボビン巻芯部の穴30に両側から挿入され、両側脚部18bがコイル14の外周を囲み互いに衝合するように配置される。   Both magnetic cores 18 are deformed E-type cores having the same shape, and their central leg portions 18a are inserted into the holes 30 of the bobbin winding core portion from both sides, and the both side leg portions 18b surround the outer periphery of the coil 14 and collide with each other. Arranged to match.

この実施例では、図2及び図3のAに示すように、ボビン10には、その端子取付部22上のピン端子間位置で且つ巻芯部20の外側フランジ面に、垂直方向に延びる突条32を形成している。図3のAは、ボビン10の上面を示している。この突条32によって、フランジの肉厚を薄くしても、巻芯部20と端子取付部22との機械的結合強度を高めることができる。巻線機で端子取付部22を保持して自動巻線を行う際には、ボビン10にはかなりの応力が作用するが、機械的強度が増すために、巻線作業中にボビン10が破損する恐れはない。つまり、ボビン10の小型化・軽量化を達成できる。   In this embodiment, as shown in FIG. 2 and FIG. 3A, the bobbin 10 has a protrusion extending vertically in the position between the pin terminals on the terminal mounting portion 22 and on the outer flange surface of the core portion 20. Article 32 is formed. FIG. 3A shows the upper surface of the bobbin 10. Even if the flange is thinned by this protrusion 32, the mechanical coupling strength between the core part 20 and the terminal attachment part 22 can be increased. When automatic winding is performed by holding the terminal mounting portion 22 with a winding machine, considerable stress acts on the bobbin 10, but the mechanical strength increases, so that the bobbin 10 is damaged during the winding operation. There is no fear of doing. That is, the bobbin 10 can be reduced in size and weight.

また、この実施例では、図2及び図3のBに示すように、カバー16に、巻芯部20の外側フランジ面に対向するように内側絶縁壁34を設け、該内側絶縁壁34に前記ボビン10の突条32に嵌り合う溝36が形成されている。図3のBは、カバー16の底面を示している。カバー16の内側絶縁壁34の溝36とボビン10の外側フランジ面の突条32が嵌り合うことで、両者を組み合わせたときのがたつきを抑えることができる。   In this embodiment, as shown in FIG. 2 and FIG. 3B, the cover 16 is provided with an inner insulating wall 34 so as to face the outer flange surface of the core 20, and the inner insulating wall 34 has the above-described inner insulating wall 34. A groove 36 that fits into the protrusion 32 of the bobbin 10 is formed. FIG. 3B shows the bottom surface of the cover 16. By fitting the groove 36 of the inner insulating wall 34 of the cover 16 and the protrusion 32 on the outer flange surface of the bobbin 10, rattling when both are combined can be suppressed.

組立後のカバー付き巻線部品の縦断面を図4に示す。電気絶縁性の観点から問題となるのは、磁気コア16とピン端子24との最短の距離(沿面距離)であり、必要最小限の長さは確保しなければならない。本発明では、拡大して示されているように、カバー16に内側絶縁壁34が設けられているので、磁気コア18の位置とピン端子24の折り曲げ位置との最短の距離は、太線矢印で示すように、磁気コア18の位置から内側絶縁壁34に沿う垂直方向の距離aと、該内側絶縁壁34の下端からピン端子24の折り曲げ位置までの水平方向の距離bとの和(a+b)となる。従って、この距離は、内側絶縁壁が無い従来技術よりも必ず長くなる。逆に言うと、内側絶縁壁の高さ分だけ沿面距離を稼げるために、巻線部品として薄型化あるいは小型化できることになる。   FIG. 4 shows a longitudinal section of the coiled part with cover after assembly. The problem from the viewpoint of electrical insulation is the shortest distance (creeping distance) between the magnetic core 16 and the pin terminal 24, and the necessary minimum length must be ensured. In the present invention, as shown in an enlarged manner, since the inner insulating wall 34 is provided on the cover 16, the shortest distance between the position of the magnetic core 18 and the bent position of the pin terminal 24 is indicated by a thick arrow. As shown, the sum (a + b) of the distance a in the vertical direction along the inner insulating wall 34 from the position of the magnetic core 18 and the distance b in the horizontal direction from the lower end of the inner insulating wall 34 to the bent position of the pin terminal 24. It becomes. This distance is therefore always longer than in the prior art without an inner insulating wall. In other words, since the creepage distance can be increased by the height of the inner insulating wall, the winding part can be made thinner or smaller.

図4のAは、カバー16の内側絶縁壁34の高さを抑えて(aを小さく、bを大きくして)巻線部品の薄型化を図った例であり、図4のBは、カバー16の内側絶縁壁34を高くして(aを大きく、bを小さくして)巻線部品の実装面積の縮小化を図った例である。従って、H1<H2であり、W1>W2である。いずれにしても、沿面距離の合計である(a+b)が必要最小限以上になるように、aとbの寸法を決定する。   4A shows an example in which the height of the inner insulating wall 34 of the cover 16 is suppressed (a is made smaller and b is made larger) to reduce the thickness of the winding component, and FIG. This is an example in which the inner insulating wall 34 of 16 is increased (a is increased and b is decreased) to reduce the mounting area of the winding component. Therefore, H1 <H2 and W1> W2. In any case, the dimensions of a and b are determined so that the total creepage distance (a + b) is not less than the necessary minimum.

図5は、本発明に係るカバー付き巻線部品の他の実施例を示す概略図である。Aは組み立て前の状態を、Bは組み立て後の状態を、それぞれ示している。これは、前記実施例とはカバー形状が異なり、カバー46はボビン10の端子取付部22上を覆うだけの構造としている。基本的に、他の部材は前記実施例と同様であってよいので、対応する部材には同一符号を付し、それらについての説明は省略する。ボビン10の端子取付部22上のピン端子間位置で且つ巻芯部20の外側フランジ面に突条32を形成すると共に、該巻芯部20の外側フランジ面に対向するようにカバー46に内側絶縁壁34を設け、該内側絶縁壁34に前記突条32に嵌り合う溝36を形成した点は、前記実施例と同様である。従って、この例でも、機械的強度の向上と、高い電気絶縁性を確保しつつ薄型化あるいは小型化を図ることができる。   FIG. 5 is a schematic view showing another embodiment of the winding component with a cover according to the present invention. A shows the state before assembly, and B shows the state after assembly. This is different in cover shape from the above embodiment, and the cover 46 has a structure that only covers the terminal mounting portion 22 of the bobbin 10. Basically, the other members may be the same as those in the above embodiment, so the corresponding members are denoted by the same reference numerals, and description thereof will be omitted. A protrusion 32 is formed on the outer flange surface of the core portion 20 at a position between the pin terminals on the terminal mounting portion 22 of the bobbin 10 and on the inner side of the cover 46 so as to face the outer flange surface of the core portion 20. The point which provided the insulating wall 34 and formed the groove | channel 36 which fits the said protrusion 32 in this inner side insulating wall 34 is the same as that of the said Example. Therefore, also in this example, it is possible to reduce the thickness or the size while improving the mechanical strength and ensuring high electrical insulation.

本発明に係るカバー付き巻線部品の一実施例を示す組立概略図。The assembly schematic which shows one Example of the winding components with a cover which concerns on this invention. ボビンとカバーを示す側面図。The side view which shows a bobbin and a cover. ボビンの上面図とカバーの底面図。The top view of a bobbin, and the bottom view of a cover. カバー付き巻線部品の縦断面図。The longitudinal cross-sectional view of the winding component with a cover. 本発明に係るカバー付き巻線部品の他の実施例を示す組立概略図。The assembly schematic which shows the other Example of the winding component with a cover which concerns on this invention.

符号の説明Explanation of symbols

10 ボビン
12 巻線
14 コイル
16 カバー
18 磁気コア
20 巻芯部
22 端子取付部
24 ピン端子
26 カバーの本体部
28 カバーの周壁部
30 ボビン巻芯部の穴
32 突条
34 内側絶縁壁
36 溝
DESCRIPTION OF SYMBOLS 10 Bobbin 12 Winding 14 Coil 16 Cover 18 Magnetic core 20 Core part 22 Terminal attachment part 24 Pin terminal 26 Cover body part 28 Cover peripheral wall part 30 Bobbin core part hole 32 Projection 34 Inner insulating wall 36 Groove

Claims (2)

ボビンの端子取付部に複数のL型のピン端子を、その水平部分が該端子取付部上に位置し、垂直部分が端子取付部を貫通するように装着すると共に、ボビンの巻芯部に巻線が施されるコイルと、ボビンの少なくとも端子取付部上を覆うカバーと、巻芯部に一部が挿入される磁気コアを備えたカバー付き巻線部品において、
ボビンの端子取付部上のピン端子間位置で且つ巻芯部の外側フランジ面に突条を形成すると共に、該巻芯部の外側フランジ面に対向するようにカバーに内側絶縁壁を設け、該内側絶縁壁に前記突条に嵌り合う溝を形成したことを特徴とするカバー付き巻線部品。
A plurality of L-shaped pin terminals are mounted on the terminal mounting portion of the bobbin so that the horizontal portion is positioned on the terminal mounting portion and the vertical portion penetrates the terminal mounting portion, and is wound around the bobbin core. In a winding component with a cover including a coil to which a wire is applied, a cover that covers at least the terminal mounting portion of the bobbin, and a magnetic core that is partially inserted into the winding core portion,
A protrusion is formed on the outer flange surface of the core portion at a position between the pin terminals on the terminal mounting portion of the bobbin, and an inner insulating wall is provided on the cover so as to face the outer flange surface of the core portion. A winding part with a cover, characterized in that a groove that fits the protrusion is formed in an inner insulating wall.
カバーは、端子取付部上を覆う本体部と、該本体部から立ち上がりコイル側面を覆う周壁部とが、電気絶縁性樹脂で一体に成形された構造をなしている請求項1記載のカバー付き巻線部品。
The cover-covered winding according to claim 1, wherein the cover has a structure in which a main body portion covering the terminal mounting portion and a peripheral wall portion rising from the main body portion and covering a side surface of the coil are integrally formed of an electrically insulating resin. Wire parts.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110491654A (en) * 2018-05-14 2019-11-22 恩结电子零件有限公司 Coil component

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59187104U (en) * 1983-05-31 1984-12-12 株式会社 タムラ製作所 coil bobbin
JPH0423110U (en) * 1990-06-19 1992-02-26
JPH08287982A (en) * 1995-04-11 1996-11-01 Fuji Electric Co Ltd Terminal device for electric device
JP2002118023A (en) * 2000-10-12 2002-04-19 Tamura Seisakusho Co Ltd Covered small transformer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59187104U (en) * 1983-05-31 1984-12-12 株式会社 タムラ製作所 coil bobbin
JPH0423110U (en) * 1990-06-19 1992-02-26
JPH08287982A (en) * 1995-04-11 1996-11-01 Fuji Electric Co Ltd Terminal device for electric device
JP2002118023A (en) * 2000-10-12 2002-04-19 Tamura Seisakusho Co Ltd Covered small transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110491654A (en) * 2018-05-14 2019-11-22 恩结电子零件有限公司 Coil component

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