JPH10256061A - Ignition transformer - Google Patents
Ignition transformerInfo
- Publication number
- JPH10256061A JPH10256061A JP9054572A JP5457297A JPH10256061A JP H10256061 A JPH10256061 A JP H10256061A JP 9054572 A JP9054572 A JP 9054572A JP 5457297 A JP5457297 A JP 5457297A JP H10256061 A JPH10256061 A JP H10256061A
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- magnetic core
- primary
- ignition transformer
- hollow portion
- 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
Landscapes
- Insulating Of Coils (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車用エンジン
等に用いる点火トランスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition transformer used for an automobile engine or the like.
【０００２】[0002]
【従来の技術】以下、従来の点火トランスについて図面
を参照しながら説明する。2. Description of the Related Art A conventional ignition transformer will be described below with reference to the drawings.
【０００３】従来の点火トランスは、例えば、エンジン
が６気筒であれば、各気筒ごとに点火トランスを配置
し、６個の点火トランスを用いていた。In a conventional ignition transformer, for example, if the engine has six cylinders, an ignition transformer is arranged for each cylinder and six ignition transformers are used.
【０００４】この点火トランスは、筒状のケースと、こ
のケースに収納するとともに、中空部を有したボビン
と、このボビンの外周に巻回した二次巻線と、ボビンの
中空部に挿入する磁芯と、この磁芯の外周に、絶縁物を
介して巻回した一次巻線と、一次巻線を巻回した磁芯と
ボビンとの間に充填した絶縁樹脂とを備えた構成であ
る。This ignition transformer is housed in a cylindrical case, a bobbin having a hollow portion, housed in the case, a secondary winding wound around the outer periphery of the bobbin, and inserted into the hollow portion of the bobbin. A magnetic core, an outer periphery of the magnetic core, a primary winding wound through an insulator, and an insulating resin filled between the magnetic core wound with the primary winding and the bobbin. .
【０００５】また、磁芯の形状は断面を四角形状として
おり、これに伴い、ケースの形状も断面が四角形状とな
っている。[0005] The magnetic core has a square cross section, and accordingly, the case has a square cross section.
【０００６】[0006]
【発明が解決しようとする課題】一般に、点火トランス
を収納するプラグチューブ部の形状は点火プラグを装着
するためのプラグレンチ形状を基本としており、プラグ
レンチ形状は、通常、断面が円状であるので、プラグチ
ューブ部の形状および点火トランスの形状も断面円状で
あればよい。Generally, the shape of a plug tube portion for accommodating an ignition transformer is basically a plug wrench shape for mounting an ignition plug, and the plug wrench shape is usually circular in cross section. Therefore, the shape of the plug tube portion and the shape of the ignition transformer may be any circular shapes in cross section.
【０００７】すなわち、点火トランスのケースを断面が
円状となるようにした場合、仮に、磁芯が挿入されるボ
ビンの断面形状も円状にすると、上記構成では、磁芯の
断面形状が四角形状なので、磁芯の対角寸法がボビンの
断面形状である円の直径よりも小さくしておく必要が生
じる。この結果、出力特性に大きく作用する磁芯の断面
積が小さくなって、磁芯に巻回した一次巻線とボビンに
巻回した二次巻線との結合度も小さくなり、点火トラン
スの性能を低下させてしまうという問題点を有してい
た。That is, if the case of the ignition transformer has a circular cross section, and if the cross section of the bobbin into which the magnetic core is inserted is also circular, in the above configuration, the cross section of the magnetic core is square. Due to the shape, the diagonal dimension of the magnetic core needs to be smaller than the diameter of a circle which is the cross-sectional shape of the bobbin. As a result, the cross-sectional area of the magnetic core, which greatly affects the output characteristics, is reduced, and the degree of coupling between the primary winding wound on the magnetic core and the secondary winding wound on the bobbin is also reduced. Has been reduced.
【０００８】本発明は上記問題点を解決し、ケースおよ
びボビンの断面形状が円状であっても、磁芯の断面積を
小さくせず、一次巻線と二次巻線との結合度を大きくす
る磁芯を設け、性能を向上させた点火トランスを提供す
ることを目的としている。The present invention solves the above-mentioned problems, and does not reduce the cross-sectional area of the magnetic core and reduces the degree of coupling between the primary winding and the secondary winding even if the cross-sectional shapes of the case and the bobbin are circular. It is an object of the present invention to provide an ignition transformer having an increased performance by providing a magnetic core having a large size.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に本発明は、筒状の絶縁ケースと、前記絶縁ケースに収
納するとともに、中空部を有した円柱状一次ボビンと、
前記一次ボビンの外周に巻回した一次巻線と、前記一次
ボビンの中空部に挿入するとともに、二次巻線を巻回し
た中空部を有する円柱状二次ボビンと、前記二次ボビン
の中空部に挿入するとともに、複数の金属板を積層して
形成した積層金属板からなる磁芯と、前記絶縁ケース内
に充填した絶縁樹脂とを備え、前記磁芯は断面形状を全
ての内角が鈍角である多角形状とするとともに、前記絶
縁樹脂は少なくとも前記磁芯と二次ボビンとの間に充填
した構成である。To achieve the above object, the present invention provides a cylindrical insulating case, a cylindrical primary bobbin housed in the insulating case, and having a hollow portion.
A primary winding wound around the outer periphery of the primary bobbin, and inserted into the hollow portion of the primary bobbin, a cylindrical secondary bobbin having a hollow portion wound with a secondary winding, and a hollow of the secondary bobbin. A magnetic core made of a laminated metal plate formed by laminating a plurality of metal plates and an insulating resin filled in the insulating case, wherein the core has a cross-sectional shape in which all interior angles are obtuse. And the insulating resin is filled at least between the magnetic core and the secondary bobbin.
【００１０】上記構成により、磁芯は断面形状を全ての
内角が鈍角である多角形状としているので、二次ボビン
の中空部内壁と磁芯との間には、存在する空隙部が非常
に少なくなる。According to the above configuration, since the magnetic core has a polygonal cross-sectional shape in which all of the internal angles are obtuse, there is very little void space between the inner wall of the hollow portion of the secondary bobbin and the magnetic core. Become.
【００１１】さらに、二次巻線を一次巻線に内包してあ
るので、ケース外部の影響を受けにくく、一次巻線側か
らみた二次巻線の分布容量の変動を防止することができ
るとともに、高電圧を得ることもできる。Further, since the secondary winding is included in the primary winding, the secondary winding is hardly affected by the outside of the case, and the variation in the distribution capacity of the secondary winding viewed from the primary winding side can be prevented. , A high voltage can also be obtained.
【００１２】その上、二次巻線と二次ボビンとの間に絶
縁樹脂を充填しているので、絶縁破壊の原因となる空気
層を除去しており、絶縁破壊防止を図ることができる。In addition, since the insulating resin is filled between the secondary winding and the secondary bobbin, the air layer which causes the dielectric breakdown is removed, and the dielectric breakdown can be prevented.
【００１３】[0013]
【発明の実施の形態】本発明の請求項１記載の発明は、
筒状の絶縁ケースと、前記絶縁ケースに収納するととも
に、中空部を有した円柱状一次ボビンと、前記一次ボビ
ンの外周に巻回した一次巻線と、前記一次ボビンの中空
部に挿入するとともに、二次巻線を巻回した中空部を有
する円柱状二次ボビンと、前記二次ボビンの中空部に挿
入するとともに、複数の金属板を積層して形成した積層
金属板からなる磁芯と、前記絶縁ケース内に充填した絶
縁樹脂とを備え、前記磁芯は断面形状を全ての内角が鈍
角である多角形状とするとともに、前記絶縁樹脂は少な
くとも前記磁芯と二次ボビンとの間に充填した構成であ
る。BEST MODE FOR CARRYING OUT THE INVENTION
A cylindrical insulating case, housed in the insulating case, a cylindrical primary bobbin having a hollow portion, a primary winding wound around the outer periphery of the primary bobbin, and inserted into the hollow portion of the primary bobbin. A cylindrical secondary bobbin having a hollow portion wound with a secondary winding, and a magnetic core made of a laminated metal plate formed by laminating a plurality of metal plates while being inserted into the hollow portion of the secondary bobbin. And an insulating resin filled in the insulating case, wherein the magnetic core has a polygonal cross-sectional shape in which all interior angles are obtuse, and the insulating resin is at least between the magnetic core and the secondary bobbin. This is a filled configuration.
【００１４】上記構成により、磁芯は断面形状を全ての
内角が鈍角である多角形状としているので、二次ボビン
の中空部内壁と磁芯との間には、存在する空隙部が非常
に少なくなる。According to the above configuration, since the magnetic core has a polygonal cross-sectional shape in which all of the internal angles are obtuse, there are very few voids between the inner wall of the hollow portion of the secondary bobbin and the magnetic core. Become.
【００１５】この結果、磁芯と二次ボビンの中空部内壁
との間に存在する空隙部の量は、磁芯の断面が四角形状
の場合よりも、減少させることができ、一次巻線と二次
巻線との結合度を向上させることができる。As a result, the amount of the gap existing between the magnetic core and the inner wall of the hollow portion of the secondary bobbin can be reduced as compared with the case where the cross section of the magnetic core is rectangular, and the amount of the void can be reduced. The degree of coupling with the secondary winding can be improved.
【００１６】さらに、二次巻線を一次巻線に内包してあ
るので、ケース外部の影響を受けにくく、一次巻線側か
らみた二次巻線の分布容量の変動を防止することができ
るとともに、高電圧を得ることもできる。Further, since the secondary winding is included in the primary winding, the secondary winding is hardly affected by the outside of the case, and the variation in the distribution capacitance of the secondary winding viewed from the primary winding side can be prevented. , A high voltage can also be obtained.
【００１７】その上、二次巻線と二次ボビンとの間に絶
縁樹脂を充填しているので、絶縁破壊の原因となる空気
層を除去しており、絶縁破壊防止を図ることができる。In addition, since the insulating resin is filled between the secondary winding and the secondary bobbin, the air layer which causes the dielectric breakdown is removed, and the dielectric breakdown can be prevented.
【００１８】本発明の請求項２記載の発明は、請求項１
記載の発明において、磁芯は、積層金属板を複数組み合
わせて形成し、かつ複数の前記積層金属板の断面形状を
同一形状とした構成である。The second aspect of the present invention is the first aspect of the present invention.
In the invention described, the magnetic core is formed by combining a plurality of laminated metal plates, and has a configuration in which a plurality of the laminated metal plates have the same cross-sectional shape.
【００１９】上記構成により、作業効率が良く、また、
金属板の積層順、組合せ順を間違えることもなく信頼性
が良い。With the above configuration, the working efficiency is good, and
Good reliability without mistaking the order of lamination and combination of metal plates.
【００２０】本発明の請求項３記載の発明は、二次巻線
を巻回した磁芯を二次ボビンの中空部内で位置決めする
保持具を、前記二次ボビンと前記磁芯との間に、少なく
とも一つ設けた構成である。According to a third aspect of the present invention, a holder for positioning a magnetic core wound with a secondary winding in a hollow portion of a secondary bobbin is provided between the secondary bobbin and the magnetic core. , At least one provided.
【００２１】上記構成により、磁芯を二次ボビン内で位
置決めできるとともに、確実に保持でき、信頼性を向上
させることができる。According to the above configuration, the magnetic core can be positioned in the secondary bobbin, can be securely held, and the reliability can be improved.
【００２２】本発明の請求項４記載の発明は、保持具に
貫通孔を設け、前記貫通孔に磁芯を嵌合させるととも
に、前記保持具を二次ボビンの中空部に嵌合させた構成
である。According to a fourth aspect of the present invention, a holder is provided with a through hole, a magnetic core is fitted into the through hole, and the holder is fitted into a hollow portion of a secondary bobbin. It is.
【００２３】上記構成により、二次ボビン内における磁
芯の位置決めおよび保持をより一層確実にでき、信頼性
を一層向上させることができる。According to the above configuration, the positioning and holding of the magnetic core in the secondary bobbin can be more reliably performed, and the reliability can be further improved.
【００２４】（実施の形態）以下、本発明の一実施の形
態における点火トランスについて、図面を参照しながら
説明する。(Embodiment) An ignition transformer according to an embodiment of the present invention will be described below with reference to the drawings.
【００２５】図１は本発明の一実施の形態における点火
トランスの分解斜視図、図２は同点火トランスの斜視
図、図３は同点火トランスの断面図、図４は同点火トラ
ンスの磁芯の斜視図、図５は本発明と従来の点火トラン
スの出力対比を示す構成比較図である。FIG. 1 is an exploded perspective view of an ignition transformer according to an embodiment of the present invention, FIG. 2 is a perspective view of the ignition transformer, FIG. 3 is a sectional view of the ignition transformer, and FIG. FIG. 5 is a configuration comparison diagram showing an output comparison between the present invention and a conventional ignition transformer.
【００２６】図１〜図４において、本発明の一実施の形
態における点火トランスは、熱可塑性樹脂よりなる筒状
であって、その開口部側の一端に蓋１を受ける受け台２
を一体形成した絶縁ケース３と、この絶縁ケース３の内
壁に装着したシールド２０と、絶縁ケース３内に収納す
るとともに、中空部４を有した円柱状一次ボビン５と、
この一次ボビン５の外周に巻回した一次巻線６と、この
一次ボビン５の中空部４に挿入するとともに、二次巻線
７を巻回した中空部８を有する円柱状二次ボビン９と、
この二次ボビン９の中空部８に挿入するとともに、複数
の金属板を積層して形成した積層金属板１０からなる磁
芯１１と、この磁芯１１の両端に配置した磁石１２と、
絶縁ケース３内に充填した絶縁樹脂１３とを備えてい
る。1 to 4, an ignition transformer according to an embodiment of the present invention has a cylindrical shape made of a thermoplastic resin, and has a receiving base 2 for receiving a lid 1 at one end on an opening side thereof.
And a shield 20 mounted on the inner wall of the insulating case 3, a cylindrical primary bobbin 5 having a hollow portion 4 and housed in the insulating case 3.
A primary winding 6 wound around the outer periphery of the primary bobbin 5, a cylindrical secondary bobbin 9 having a hollow portion 8 around which a secondary winding 7 is wound while being inserted into the hollow portion 4 of the primary bobbin 5. ,
A magnetic core 11 composed of a laminated metal plate 10 formed by laminating a plurality of metal plates while being inserted into the hollow portion 8 of the secondary bobbin 9, and magnets 12 disposed at both ends of the magnetic core 11.
And an insulating resin 13 filled in the insulating case 3.
【００２７】また、磁芯１１は、断面形状を全ての内角
が鈍角である多角形状の六角形状とするとともに、絶縁
樹脂１３は磁芯１１と二次ボビン９との間、二次ボビン
９と一次ボビン５との間、一次ボビン５と絶縁ケース３
との間に充填している。The magnetic core 11 has a polygonal hexagonal cross section with all interior angles being obtuse, and the insulating resin 13 is provided between the magnetic core 11 and the secondary bobbin 9, and between the magnetic core 11 and the secondary bobbin 9. Between primary bobbin 5, primary bobbin 5 and insulating case 3
Between the filling.
【００２８】さらに、磁芯１１は、同一形状の金属板を
複数積層した積層金属板１０を三つ組み合わせて形成
し、かつ三つの積層金属板１０の断面形状を同一形状の
菱形としている。Further, the magnetic core 11 is formed by combining three laminated metal plates 10 in which a plurality of metal plates of the same shape are laminated, and the cross-sectional shape of the three laminated metal plates 10 is a rhombus of the same shape.
【００２９】その上、磁芯１１を二次ボビン９の中空部
８内で位置決めする保持具１４を、二次ボビン９と磁芯
１１との間に、二つ設けるとともに、この保持具１４に
貫通孔１５を設け、この貫通孔１５に磁芯１１を嵌合さ
せるとともに、保持具１４を二次ボビン９の中空部８に
嵌合させた構成である。In addition, two holders 14 for positioning the magnetic core 11 in the hollow portion 8 of the secondary bobbin 9 are provided between the secondary bobbin 9 and the magnetic core 11, and the holder 14 The through hole 15 is provided, the magnetic core 11 is fitted into the through hole 15, and the holder 14 is fitted into the hollow portion 8 of the secondary bobbin 9.
【００３０】上記構成の点火トランスについて、以下そ
の動作を説明する。磁芯１１は断面形状を全ての内角が
鈍角である多角形状の六角形状としているので、二次ボ
ビン９の中空部８内壁と磁芯１１との間には、存在する
空隙部が非常に少なくなる。The operation of the ignition transformer having the above configuration will be described below. Since the magnetic core 11 has a polygonal hexagonal cross-sectional shape in which all internal angles are obtuse, there are very few voids between the inner wall of the hollow portion 8 of the secondary bobbin 9 and the magnetic core 11. Become.
【００３１】これにより、磁芯１１と二次ボビン９の中
空部８内壁との間に存在する空隙部の量は、磁芯１１の
断面が四角形状の場合よりも、減少させることができ、
一次巻線６と二次巻線７との結合度を向上させることが
できる。As a result, the amount of the gap existing between the magnetic core 11 and the inner wall of the hollow portion 8 of the secondary bobbin 9 can be reduced as compared with the case where the cross section of the magnetic core 11 is square.
The degree of coupling between the primary winding 6 and the secondary winding 7 can be improved.
【００３２】さらに、二次巻線７を一次巻線６に内包し
てあるので、絶縁ケース３外部の影響を受けにくく、一
次巻線６側からみた二次巻線７の分布容量の変動を防止
することができるとともに、高電圧を得ることもでき
る。Further, since the secondary winding 7 is included in the primary winding 6, the secondary winding 7 is hardly affected by the outside of the insulating case 3, and the variation in the distributed capacitance of the secondary winding 7 as viewed from the primary winding 6 is reduced. It is possible to prevent high voltage.
【００３３】このとき、図５に示すように、二次巻線７
を一次巻線６に内包しない従来の点火トランスと比較す
ると、シールドおよび外部アースを用いない単品の構
成、シールドを用いた構成、シールドおよび外部アース
を用いた構成につれて、本発明および従来の点火トラン
スともに、出力が低下するが、本発明はその低下の割合
が非常に小さい。At this time, as shown in FIG.
Compared with a conventional ignition transformer not including the primary winding 6, the present invention and the conventional ignition transformer have been described in accordance with the structure of a single product without using the shield and the external ground, the configuration using the shield, and the configuration using the shield and the external ground. In both cases, the output decreases, but the rate of the decrease is very small in the present invention.
【００３４】また、二次巻線７と二次ボビン９との間に
絶縁樹脂１３を充填しているので、絶縁破壊の原因とな
る空気層を除去しており、絶縁破壊防止を図ることがで
きる。Further, since the insulating resin 13 is filled between the secondary winding 7 and the secondary bobbin 9, the air layer causing the dielectric breakdown is removed, and the dielectric breakdown can be prevented. it can.
【００３５】さらに、磁芯１１は、積層金属板１０を三
つ組み合わせて形成し、かつ三つの積層金属板１０の断
面形状を同一形状の菱形としているので、作業効率が良
く、同一形状の金属板を用いるので、積層順、組合せ順
を間違えることもなく信頼性が良い。Further, since the magnetic core 11 is formed by combining three laminated metal plates 10 and the cross-sectional shape of the three laminated metal plates 10 is a rhombus of the same shape, the work efficiency is good and the metal of the same shape is formed. Since a plate is used, reliability is good without mistaking the order of lamination and combination.
【００３６】その上、二次巻線７を巻回した磁芯１１を
二次ボビン９の中空部８内で位置決めする保持具１４
を、二次ボビン９と磁芯１１との間に、二つ設けている
ので、磁芯１１を二次ボビン９内で位置決めできるとと
もに、確実に保持でき、信頼性を向上させることができ
る。In addition, a holder 14 for positioning the magnetic core 11 wound with the secondary winding 7 in the hollow portion 8 of the secondary bobbin 9
Are provided between the secondary bobbin 9 and the magnetic core 11, the magnetic core 11 can be positioned in the secondary bobbin 9, can be securely held, and the reliability can be improved.
【００３７】このとき、保持具１４に貫通孔１５を設
け、この貫通孔１５に磁芯１１を嵌合させるとともに、
保持具１４を二次ボビン９の中空部８に嵌合させている
ので、二次ボビン９内における磁芯１１の位置決めおよ
び保持をより一層確実にでき、信頼性を一層向上させる
ことができる。At this time, a through hole 15 is provided in the holder 14 and the magnetic core 11 is fitted into the through hole 15.
Since the holder 14 is fitted into the hollow portion 8 of the secondary bobbin 9, the positioning and holding of the magnetic core 11 in the secondary bobbin 9 can be more reliably performed, and the reliability can be further improved.
【００３８】[0038]
【発明の効果】以上のように本発明によれば、磁芯は断
面形状を全ての内角が鈍角である多角形状としているの
で、二次ボビンの中空部内壁と磁芯との間には、存在す
る空隙部が非常に少なくなり、磁芯と二次ボビンの中空
部内壁との間に存在する空隙部の量は、磁芯の断面が四
角形状の場合よりも減少させることができ、一次巻線と
二次巻線との結合度を向上させることができる。As described above, according to the present invention, since the magnetic core has a polygonal cross-sectional shape in which all the internal angles are obtuse angles, there is a gap between the inner wall of the hollow portion of the secondary bobbin and the magnetic core. The number of voids existing is very small, and the amount of voids existing between the magnetic core and the inner wall of the hollow portion of the secondary bobbin can be reduced as compared with the case where the magnetic core has a square cross section. The degree of coupling between the winding and the secondary winding can be improved.
【００３９】この結果、一次巻線と二次巻線との結合度
を向上させるとともに、性能を向上させた点火トランス
を提供することができる。As a result, it is possible to provide an ignition transformer in which the degree of coupling between the primary winding and the secondary winding is improved and the performance is improved.
【００４０】さらに、二次巻線を一次巻線に内包してあ
るので、絶縁ケース外部の影響を受けにくく、一次巻線
側からみた二次巻線の分布容量の変動を防止することが
できるとともに、高電圧を得ることもできるものであ
る。Further, since the secondary winding is included in the primary winding, the secondary winding is hardly affected by the outside of the insulating case, and the variation in the distribution capacity of the secondary winding viewed from the primary winding side can be prevented. In addition, a high voltage can be obtained.
【００４１】その上、二次巻線と二次ボビンとの間に絶
縁樹脂を充填しているので、絶縁破壊の原因となる空気
層を除去しており、絶縁破壊防止を図ることもできるも
のである。In addition, since an insulating resin is filled between the secondary winding and the secondary bobbin, an air layer which causes dielectric breakdown is removed, thereby preventing dielectric breakdown. It is.
【図１】本発明の一実施の形態における点火トランスの
分解斜視図FIG. 1 is an exploded perspective view of an ignition transformer according to an embodiment of the present invention.
【図２】同点火トランスの斜視図FIG. 2 is a perspective view of the ignition transformer.
【図３】同点火トランスの断面図FIG. 3 is a sectional view of the ignition transformer.
【図４】同点火トランスの磁芯の斜視図FIG. 4 is a perspective view of a magnetic core of the ignition transformer.
【図５】本発明と従来の点火トランスの出力対比を示す
構成比較図FIG. 5 is a configuration comparison diagram showing an output comparison between the present invention and a conventional ignition transformer.
１ 蓋 ２ 受け台 ３ 絶縁ケース ４ 中空部 ５ 一次ボビン ６ 一次巻線 ７ 二次巻線 ８ 中空部 ９ 二次ボビン １０ 積層金属板 １１ 磁芯 １２ 磁石 １３ 絶縁樹脂 １４ 保持具 １５ 貫通孔 DESCRIPTION OF SYMBOLS 1 Cover 2 Receiving stand 3 Insulating case 4 Hollow part 5 Primary bobbin 6 Primary winding 7 Secondary winding 8 Hollow part 9 Secondary bobbin 10 Laminated metal plate 11 Magnetic core 12 Magnet 13 Insulating resin 14 Holder 15 Through hole
Claims (4)
収納するとともに、中空部を有した円柱状一次ボビン
と、前記一次ボビンの外周に巻回した一次巻線と、前記
一次ボビンの中空部に挿入するとともに、二次巻線を巻
回した中空部を有する円柱状二次ボビンと、前記二次ボ
ビンの中空部に挿入するとともに、複数の金属板を積層
して形成した積層金属板からなる磁芯と、前記絶縁ケー
ス内に充填した絶縁樹脂とを備え、前記磁芯は断面形状
を全ての内角が鈍角である多角形状とするとともに、前
記絶縁樹脂は少なくとも前記磁芯と二次ボビンとの間に
充填した点火トランス。1. A cylindrical insulating case, a cylindrical primary bobbin housed in the insulating case and having a hollow portion, a primary winding wound around the outer periphery of the primary bobbin, and a hollow of the primary bobbin. And a cylindrical metal bobbin having a hollow portion wound with a secondary winding, and a laminated metal plate formed by inserting a plurality of metal plates while being inserted into the hollow portion of the secondary bobbin. And an insulating resin filled in the insulating case, wherein the magnetic core has a polygonal cross-sectional shape in which all internal angles are obtuse, and the insulating resin is at least secondary to the magnetic core. Ignition transformer filled between bobbin.
形成し、かつ複数の前記積層金属板の断面形状を同一形
状とした請求項１記載の点火トランス。2. The ignition transformer according to claim 1, wherein the magnetic core is formed by combining a plurality of laminated metal plates, and the plurality of laminated metal plates have the same cross-sectional shape.
する保持具を、前記二次ボビンと前記磁芯との間に、少
なくとも一つ設けた請求項１記載の点火トランス。3. The ignition transformer according to claim 1, wherein at least one holder for positioning the magnetic core in the hollow portion of the secondary bobbin is provided between the secondary bobbin and the magnetic core.
芯を嵌合させるとともに、前記保持部を二次ボビンの中
空部に嵌合させた請求項３記載の点火トランス。4. The ignition transformer according to claim 3, wherein a through hole is provided in the holder, a magnetic core is fitted into the through hole, and the holding portion is fitted into a hollow portion of the secondary bobbin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9054572A JPH10256061A (en) | 1997-03-10 | 1997-03-10 | Ignition transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9054572A JPH10256061A (en) | 1997-03-10 | 1997-03-10 | Ignition transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10256061A true JPH10256061A (en) | 1998-09-25 |
Family
ID=12974416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9054572A Pending JPH10256061A (en) | 1997-03-10 | 1997-03-10 | Ignition transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10256061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339497A (en) * | 1998-06-22 | 2000-01-26 | Koito Mfg Co Ltd | Transformer and method of assembling it |
-
1997
- 1997-03-10 JP JP9054572A patent/JPH10256061A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339497A (en) * | 1998-06-22 | 2000-01-26 | Koito Mfg Co Ltd | Transformer and method of assembling it |
| GB2339497B (en) * | 1998-06-22 | 2000-09-06 | Koito Mfg Co Ltd | Transformer and method of assembling it |
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