JPH09186030A - Ignition coil of internal combustion engine - Google Patents
Ignition coil of internal combustion engineInfo
- Publication number
- JPH09186030A JPH09186030A JP7352790A JP35279095A JPH09186030A JP H09186030 A JPH09186030 A JP H09186030A JP 7352790 A JP7352790 A JP 7352790A JP 35279095 A JP35279095 A JP 35279095A JP H09186030 A JPH09186030 A JP H09186030A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- cylindrical
- internal combustion
- combustion engine
- cylindrical member
- 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
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は内燃機関用点火コイ
ルに関し、特に、磁性体の柱状部材に一次コイル及び二
次コイルを装着し、磁性体の円筒部材の中空部内に収容
する内燃機関用点火コイルに係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition coil for an internal combustion engine, and more particularly to an ignition coil for an internal combustion engine in which a primary coil and a secondary coil are mounted on a columnar member made of a magnetic material and housed in a hollow portion of a cylindrical member made of a magnetic material. Related to the coil.
【０００２】[0002]
【従来の技術】近時、内燃機関用点火コイルの一層の小
型化が要請されており、そのコア構造として、例えば特
開平４−８７３１１号公報に開示されているように、磁
性体の線材を束ねて中心鉄心を形成したものが知られて
いる。これは、エンジンの円柱状プラグホールに収納す
るため、点火コイルを小型の円柱状に形成することを企
図したものである。2. Description of the Related Art Recently, there has been a demand for further miniaturization of ignition coils for internal combustion engines, and as a core structure thereof, for example, a magnetic wire is used as disclosed in Japanese Patent Laid-Open No. 4-87311. It is known that a central iron core is formed by bundling. This is intended to form the ignition coil into a small cylindrical shape so as to be housed in the cylindrical plug hole of the engine.
【０００３】同公報では、外部円筒状磁気通路部材２２
の中空部内に中心鉄心２０、一次コイル２４及び二次コ
イル２５が収容されているが、外部円筒状磁気通路部材
２２の外面にはケースが設けられておらず、そのままエ
ンジンに装着されている。In the publication, the outer cylindrical magnetic path member 22 is used.
The central iron core 20, the primary coil 24, and the secondary coil 25 are housed in the hollow portion of the above, but no case is provided on the outer surface of the outer cylindrical magnetic path member 22, and the outer core is directly attached to the engine.
【０００４】[0004]
【発明が解決しようとする課題】然し乍ら、上記の点火
コイルはイグナイタ等の他の部品と共にケース内に収容
され、点火コイルアッセンブリとしてエンジンに装着さ
れるのが望ましい。この場合、外部円筒状磁気通路部材
（以下、単に円筒部材という）は円筒状のケース内に挿
入もしくは圧入されることになる。However, it is desirable that the above ignition coil is housed in a case together with other parts such as an igniter and mounted on the engine as an ignition coil assembly. In this case, the external cylindrical magnetic path member (hereinafter, simply referred to as a cylindrical member) is inserted or press-fitted in the cylindrical case.
【０００５】円筒部材をケース内に挿入するためには、
円筒部材の外径をケースの内径より小さくする必要があ
り、作業性を考慮すると一定の間隙を設定せざるを得な
い。しかも、二次コイルと円筒部材との間に耐電圧寸法
を確保する必要があるため、一定の間隙が必要であり、
この間隙に上記の挿入用の間隙が加わることになるの
で、点火コイル全体の外径が大となり小型化の要請に反
することとなる。In order to insert the cylindrical member into the case,
It is necessary to make the outer diameter of the cylindrical member smaller than the inner diameter of the case, and in view of workability, a certain gap must be set. Moreover, since it is necessary to secure the withstand voltage dimension between the secondary coil and the cylindrical member, a constant gap is required,
Since the above-mentioned gap for insertion is added to this gap, the outer diameter of the entire ignition coil becomes large, which violates the demand for miniaturization.
【０００６】一方、円筒部材をケース内に圧入する場合
には、圧入荷重が大きいので円筒部材の変形が生ずるお
それがあり、生産性が低下する。また、ケース成形時の
内径の寸法精度を高精度とする必要があるが、ケースの
軸方向長さが長いので、金型の構造が複雑化し、成形性
も劣り、コストアップとなる。On the other hand, when the cylindrical member is press-fitted into the case, since the press-fitting load is large, the cylindrical member may be deformed and the productivity is lowered. Further, the dimensional accuracy of the inner diameter at the time of molding the case needs to be high, but since the axial length of the case is long, the structure of the mold becomes complicated, the moldability becomes poor, and the cost increases.
【０００７】そこで、本発明は、磁性体の柱状部材に一
次コイル及び二次コイルを装着し、磁性体の円筒部材の
中空部内に収容する内燃機関用点火コイルにおいて、円
筒容器内に円筒部材を容易に収容し得るように構成する
ことを課題とする。Therefore, according to the present invention, in an ignition coil for an internal combustion engine in which a primary coil and a secondary coil are mounted on a magnetic columnar member and housed in the hollow portion of the magnetic cylindrical member, the cylindrical member is placed in a cylindrical container. An object is to configure so that it can be easily accommodated.
【０００８】[0008]
【課題を解決するための手段】上記の課題を解決するた
め、本発明は、磁性体の柱状部材に一次コイル及び二次
コイルを装着し、磁性体の円筒部材の中空部内に収容す
る内燃機関用点火コイルにおいて、前記円筒部材を収容
する円筒容器を備え、前記円筒部材が、磁性体の矩形の
平板を円筒状に折曲して成り、前記円筒容器内に収容し
たとき前記円筒部材の周方向に所定の間隙が形成される
大きさに、前記平板を形成することとしたものである。In order to solve the above problems, the present invention provides an internal combustion engine in which a primary coil and a secondary coil are mounted on a columnar member made of a magnetic material and housed in a hollow portion of a cylindrical member made of a magnetic material. In the ignition coil for a vehicle, a cylindrical container for accommodating the cylindrical member is provided, and the cylindrical member is formed by bending a rectangular flat plate of a magnetic material into a cylindrical shape. The flat plate is formed in such a size that a predetermined gap is formed in the direction.
【０００９】而して、平板が円筒状に折曲されて円筒部
材が形成され、この円筒部材が縮径されて円筒容器内に
挿入される。このとき、円筒部材には周方向に間隙が形
成されるように設定されているので、円筒容器の内径の
寸法公差を容易に吸収することができる。また、円筒部
材を縮径した状態で円筒容器内に収容し、収容後に弾性
力によって拡開して円筒容器の内壁面に密着する。Then, the flat plate is bent into a cylindrical shape to form a cylindrical member, and this cylindrical member is reduced in diameter and inserted into the cylindrical container. At this time, since a gap is formed in the cylindrical member in the circumferential direction, it is possible to easily absorb the dimensional tolerance of the inner diameter of the cylindrical container. Further, the cylindrical member is housed in the cylindrical container in a reduced diameter state, and after being housed, it is expanded by an elastic force and brought into close contact with the inner wall surface of the cylindrical container.
【００１０】[0010]
【発明の実施の形態】以下、本発明の内燃機関用点火コ
イルの望ましい実施形態を図面を参照して説明する。図
８は本発明の一実施形態に係る内燃機関用点火コイルを
示し、ケース６０は、上方に開口部を有する筐体のイグ
ナイタ部６０ｄと、その底面から下方に延出する円筒状
のコイル部６０ａ及びプラグキャップ部６０ｂを有する
合成樹脂製の容器状筐体である。図１は図２のＡ−Ａ線
断面を示す図で、図１及び図２においてはコイル部６０
ａのみを示し、他の部分は省略している。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an ignition coil for an internal combustion engine of the present invention will be described below with reference to the drawings. FIG. 8 shows an ignition coil for an internal combustion engine according to an embodiment of the present invention. A case 60 includes an igniter portion 60d of a casing having an opening at the top and a cylindrical coil portion extending downward from the bottom surface thereof. It is a container-like housing made of synthetic resin having 60a and a plug cap portion 60b. 1 is a view showing a cross section taken along the line AA of FIG. 2, and in FIG. 1 and FIG.
Only a is shown and other parts are omitted.
【００１１】コイル部６０ａには図２に示すように、本
発明の柱状部材たるインナコア１０、これに一体成形さ
れた一次ボビン１１及び一次コイル１２、二次コイルア
センブリ２０、本発明の円筒部材たるアウタコア３０、
並びに一対の補助コア及び永久磁石（夫々、代表して４
０，５０で表す）が収容されている。図８に示すイグナ
イタ部６０ｄにはイグナイタ（図示せず）が収容される
と共に、コネクタ部６０ｃが一体的に形成されている。
尚、イグナイタは一次コイル１２の一次電流を制御する
もので、イグニッションモジュールとも呼ばれる。As shown in FIG. 2, the coil portion 60a includes an inner core 10 which is a columnar member of the present invention, a primary bobbin 11 and a primary coil 12 integrally molded with the inner core 10, a secondary coil assembly 20, and a cylindrical member of the present invention. Outer core 30,
And a pair of auxiliary cores and permanent magnets (representatively 4
(Represented by 0,50). An igniter (not shown) is housed in the igniter portion 60d shown in FIG. 8 and a connector portion 60c is integrally formed.
The igniter controls the primary current of the primary coil 12 and is also called an ignition module.
【００１２】インナコア１０は、図４乃至図７に示すよ
うに構成されている。即ち、両側の端部Ｍpaの幅が中間
部Ｍpbより大に形成された複数の磁性体の平板、即ち珪
素鋼板（代表してＭＰで表す）が積層されて成る。これ
らの珪素鋼板ＭＰは、図７に示すように、両側に配置す
る珪素鋼板ＭＰから中央に配置する珪素鋼板ＭＰの順
に、中間部Ｍpbの幅が漸増するように形成されており、
これらが積層されると中間部１０ｂが直径約８ｍｍの略
円形断面の柱状部材となる。これに対し、両側の端部１
０ａの端面は図６に示すように矩形となり、中間部１０
ｂの断面より大の断面積を有する。尚、図５及び図７に
おいては、インナコア１０の断面のハッチングは図面の
判別が困難となるので省略している。The inner core 10 is constructed as shown in FIGS. That is, a plurality of magnetic flat plates, that is, silicon steel plates (typically represented by MP), in which the widths of the end portions Mpa on both sides are larger than that of the middle portion Mpb, are laminated. As shown in FIG. 7, these silicon steel plates MP are formed such that the width of the intermediate portion Mpb gradually increases in the order of the silicon steel plates MP arranged on both sides to the silicon steel plate MP arranged in the center.
When these are stacked, the intermediate portion 10b becomes a columnar member having a diameter of about 8 mm and a substantially circular cross section. On the other hand, the ends 1 on both sides
The end surface of 0a has a rectangular shape as shown in FIG.
It has a larger cross-sectional area than the cross section of b. 5 and 7, hatching of the cross section of the inner core 10 is omitted because it is difficult to distinguish the drawings.
【００１３】そして、スタッキングにより両側の端部１
０ａにスタッキング部Ｓtaが形成され、中間部１０ｂに
三箇所のスタッキング部Ｓtbが形成され、計五箇所の円
形のスタッキング部Ｓta，Ｓtbによって複数の珪素鋼板
ＭＰが接合される。このスタッキング部Ｓta，Ｓtbの形
状は円形でなく他の形状でもよい。特に、各珪素鋼板Ｍ
Ｐの両側の端部Ｍpaが幅広に形成されているので、スタ
ッキング部Ｓtaを直径５ｍｍ以上とすることができ、２
ｋｇｆ以上の接合強度を確保することができる。ここ
で、スタッキングとは複数の平板の各々に対しプレス成
形時に一方の面に凹部を形成すると共に他方の面に凸部
を形成し、これらの複数の平板を、相互に対向する面の
凸部を凹部に圧入し乍ら順次重合して、積層体を形成す
る手段をいう。尚、インナコア１０の構造については上
記に限ることなく、例えば前掲の公報に記載のように複
数の線材を円柱状に束ねたものでもよく、あるいは磁性
体の平板を渦巻状に巻回して円柱状に形成したものでも
よい。The end portions 1 on both sides are stacked by stacking.
A stacking portion Sta is formed at 0a, and three stacking portions Stb are formed at the intermediate portion 10b, and a plurality of silicon steel plates MP are joined by the circular stacking portions Sta and Stb at a total of five places. The stacking portions Sta and Stb may have other shapes than the circular shape. Especially, each silicon steel plate M
Since the end portions Mpa on both sides of P are formed wide, the stacking portion Sta can have a diameter of 5 mm or more.
Bonding strength of kgf or more can be secured. Here, stacking means forming a concave portion on one surface and a convex portion on the other surface at the time of press molding for each of a plurality of flat plates, and forming a plurality of flat plates on the convex portions of the surfaces facing each other. Means to form a laminate by press-fitting into the recesses and sequentially polymerizing. The structure of the inner core 10 is not limited to the above. For example, a plurality of wire rods may be bundled into a cylindrical shape as described in the above-mentioned publication, or a flat plate of a magnetic material may be wound into a cylindrical shape. It may be formed in the above.
【００１４】インナコア１０の外面には合成樹脂により
一次ボビン１１が一体的に形成されており、一次ボビン
１１の外周面に一次コイル１２の巻線が二層もしくは四
層に巻回されている。そして、これらを囲繞するように
二次コイルアセンブリ２０が配設されている。二次コイ
ルアセンブリ２０は、二次ボビン２１に二次コイル２２
が巻装されて成る。二次ボビン２１は軸方向に所定間隔
毎に複数の鍔部２１ａが形成された樹脂製の円筒体であ
り、これらの鍔部２１ａ間に形成される複数の環状溝内
に、二次コイル２２の巻線が順次巻回されている。A primary bobbin 11 is integrally formed on the outer surface of the inner core 10 with a synthetic resin, and the winding of the primary coil 12 is wound in two or four layers on the outer peripheral surface of the primary bobbin 11. And the secondary coil assembly 20 is arrange | positioned so that these may be surrounded. The secondary coil assembly 20 includes a secondary bobbin 21 and a secondary coil 22.
Is wound. The secondary bobbin 21 is a resin cylindrical body in which a plurality of collar portions 21a are formed at predetermined intervals in the axial direction, and the secondary coil 22 is provided in a plurality of annular grooves formed between the collar portions 21a. The windings are sequentially wound.
【００１５】一方、インナコア１０と共に磁気回路を形
成するアウタコア３０が、図１及び図２に示すようにケ
ース６０のコイル部６０ａの内側に密着して収容されて
いる。アウタコア３０は、図３に示すように、例えば厚
さ０．３５ｍｍの珪素鋼板ＳＰが折曲されて円筒状に成
形される。即ち、ケース６０のコイル部６０ａ内に収容
される前の状態では、コイル部６０ａの内径（例えば２
１ｍｍ±０．１ｍｍ）より若干大きい外径（例えば２
１．１ｍｍ以上）となるようにプレス成形される。この
とき、周方向の端面３０ａ，３０ｂ間に間隙ｄ（例え
ば、０．５乃至１．５ｍｍ）が形成されるように成形さ
れる。On the other hand, the outer core 30 forming a magnetic circuit together with the inner core 10 is housed in close contact with the inside of the coil portion 60a of the case 60 as shown in FIGS. As shown in FIG. 3, the outer core 30 is formed into a cylindrical shape by bending a silicon steel plate SP having a thickness of 0.35 mm, for example. That is, in the state before being housed in the coil portion 60a of the case 60, the inner diameter of the coil portion 60a (for example, 2
Outside diameter slightly larger than 1 mm ± 0.1 mm (eg 2
It is press-formed to have a thickness of 1.1 mm or more). At this time, molding is performed so that a gap d (for example, 0.5 to 1.5 mm) is formed between the end faces 30a and 30b in the circumferential direction.
【００１６】更に、図１及び図２に示すように、インナ
コア１０の軸方向の両端には夫々矩形の永久磁石５０が
配置されており、その外側には略矩形の珪素鋼板が積層
されて成る補助コア４０（図２ではハッチング省略）が
配置されている。両端に配置される永久磁石５０は、発
生する磁束の方向が夫々同一の方向であって、一次コイ
ル１２通電時にインナコア１０内に形成される磁束の方
向と逆向きとなるように配置されている。而して、上述
のインナコア１０、永久磁石５０、補助コア４０、及び
アウタコア３０によって磁気回路が構成されている。Further, as shown in FIGS. 1 and 2, rectangular permanent magnets 50 are arranged at both axial ends of the inner core 10, and a substantially rectangular silicon steel plate is laminated on the outer side thereof. An auxiliary core 40 (hatching is omitted in FIG. 2) is arranged. The permanent magnets 50 arranged at both ends are arranged such that the directions of the generated magnetic fluxes are the same and are opposite to the direction of the magnetic flux formed in the inner core 10 when the primary coil 12 is energized. . Thus, the inner core 10, the permanent magnet 50, the auxiliary core 40, and the outer core 30 described above form a magnetic circuit.
【００１７】上記の構成になる点火コイルの製造及び組
付に当たっては、先ず、珪素鋼板ＳＰが図３に示すよう
に円筒状に折曲されてアウタコア３０が形成され、その
外径がコイル部６０ａの内径より小さくなるように径方
向に圧縮される。この状態でコイル部６０ａ内に収容さ
れ、圧縮状態が解除されると、アウタコア３０は、その
弾性力によってコイル部６０ａ内で拡開し、コイル部６
０ａの内壁面に密着する。In manufacturing and assembling the ignition coil having the above-described structure, first, the silicon steel plate SP is bent into a cylindrical shape as shown in FIG. 3 to form the outer core 30, and the outer diameter thereof is the coil portion 60a. Is compressed in the radial direction so as to be smaller than the inner diameter of the. When the outer core 30 is housed in the coil portion 60a in this state and the compressed state is released, the outer core 30 expands in the coil portion 60a due to its elastic force, and the coil portion 6a.
It adheres to the inner wall surface of 0a.
【００１８】一方、複数（例えば２７枚）の珪素鋼板Ｍ
Ｐ（例えば、厚さ０．３ｍｍ）がスタッキングによって
接合され、図４に示すように大断面の両側の端部１０ａ
と小断面の中間部１０ｂを有するインナコア１０が形成
される。そして、図２に示すようにインナコア１０の外
面に一次ボビン１１が一体的に形成され、この一次ボビ
ン１１に一次コイル１２の巻線が巻回される。On the other hand, a plurality (eg, 27) of silicon steel plates M
P (for example, a thickness of 0.3 mm) is joined by stacking, and ends 10a on both sides of the large cross section as shown in FIG.
The inner core 10 having the intermediate portion 10b having a small cross section is formed. Then, as shown in FIG. 2, the primary bobbin 11 is integrally formed on the outer surface of the inner core 10, and the winding of the primary coil 12 is wound around the primary bobbin 11.
【００１９】また、二次ボビン２１に二次コイル２２が
巻装されて二次コイルアセンブリ２０が形成される。そ
して、二次ボビン２１の中空部内に、一次コイル１２が
巻回された一次ボビン１１及びインナコア１０が収容さ
れ、一次ボビン１１の両端部が二次ボビン２１の中空部
の内面に嵌合するように配置される。The secondary coil 22 is wound around the secondary bobbin 21 to form the secondary coil assembly 20. Then, the primary bobbin 11 and the inner core 10 around which the primary coil 12 is wound are housed in the hollow portion of the secondary bobbin 21, and both ends of the primary bobbin 11 are fitted to the inner surface of the hollow portion of the secondary bobbin 21. Is located in.
【００２０】更に、インナコア１０の軸方向の両端に夫
々永久磁石５０及び補助コア４０が装着された後、これ
らインナコア１０、二次コイルアセンブリ２０等がアウ
タコア３０内に収容される。そして、ケース６０のイグ
ナイタ部６０ｄにイグナイタ（図示せず）が収容され、
一次コイル１２の巻線の両端部がイグナイタに電気的に
接続される。これに対し、二次コイル２２の巻線の一端
は接地され、他端は高圧ターミナル（図示せず）に接続
される。Further, after the permanent magnets 50 and the auxiliary cores 40 are mounted on both ends of the inner core 10 in the axial direction, the inner core 10, the secondary coil assembly 20, etc. are housed in the outer core 30. An igniter (not shown) is housed in the igniter portion 60d of the case 60,
Both ends of the winding of the primary coil 12 are electrically connected to the igniter. On the other hand, one end of the winding of the secondary coil 22 is grounded and the other end is connected to a high voltage terminal (not shown).
【００２１】この後、コイル部６０ａ及びイグナイタ部
６０ｄ内に熱硬化性の合成樹脂、例えばエポキシ樹脂が
充填、硬化されて図２に点描で示すように樹脂部１３が
コイル部６０ａ内に形成される（イグナイタ部６０ｄ内
については図示省略）。これにより、一次コイル１２及
び二次コイル２２が含侵固着されると共に、電気的接続
部が適切に絶縁され、更に二次コイル２２の出力高電圧
に耐え得る絶縁性が確保される。尚、図８に示すコイル
部６０ａ及びプラグキャップ部６０ｂとイグナイタ部６
０ｄ及びコネクタ部６０ｃとを、別体として形成し、コ
イル部６０ａとイグナイタ部６０ｄを接合することとし
てもよい。Thereafter, the coil portion 60a and the igniter portion 60d are filled with a thermosetting synthetic resin, for example, an epoxy resin, and cured to form a resin portion 13 in the coil portion 60a as shown by a dotted line in FIG. (Not shown in the igniter portion 60d). As a result, the primary coil 12 and the secondary coil 22 are impregnated and fixed, and the electrical connection portion is appropriately insulated, and further, the insulating property capable of withstanding the high output voltage of the secondary coil 22 is secured. The coil portion 60a, the plug cap portion 60b and the igniter portion 6 shown in FIG.
0d and the connector 60c may be formed separately, and the coil 60a and the igniter 60d may be joined.
【００２２】而して、内燃機関用点火コイル１は図８に
示す外形を呈し、必要に応じ、絶縁材料（例えばゴム）
によって筒状に形成されたプラグソケット（図示せず）
が、コイル部６０ａ及びプラグキャップ部６０ｂの外側
に装着される。そして、内燃機関（図示せず）に装着さ
れ、点火プラグ（図示せず）に接続される。この状態で
一次コイル１２の一次電流が断続されると、二次コイル
２２に逆起電力が誘起され３０乃至４０ｋｖの高電圧が
発生し、この高電圧は点火プラグに出力される。これに
より、各点火プラグの電極部に火花放電が生じ、各燃焼
室（図示せず）内の圧縮混合気が着火される。Thus, the internal combustion engine ignition coil 1 has the outer shape shown in FIG. 8 and, if necessary, an insulating material (for example, rubber).
A plug socket (not shown) formed in a cylindrical shape by
Is attached to the outside of the coil portion 60a and the plug cap portion 60b. Then, it is mounted on an internal combustion engine (not shown) and connected to a spark plug (not shown). When the primary current of the primary coil 12 is interrupted in this state, a counter electromotive force is induced in the secondary coil 22 to generate a high voltage of 30 to 40 kv, which is output to the ignition plug. As a result, spark discharge occurs in the electrode portion of each ignition plug, and the compressed air-fuel mixture in each combustion chamber (not shown) is ignited.
【００２３】以上のように、内燃機関用点火コイル１の
アウタコア３０は珪素鋼板ＳＰが円筒状に折曲されて成
り、これが縮径されてケース６０内に挿入され、ケース
３０内で弾性力によって拡開すると、ケース３０の内壁
面に密着する。このとき、アウタコア３０には周方向に
間隙が形成されるように設定されているので、ケース６
０の内径の寸法公差を容易に吸収することができる。従
って、両者間の間隙を予め設定しておく必要はなく、そ
れだけ径方向の小型化が可能となる。しかも、アウタコ
ア３０を縮径した状態でケース６０内に収容すれば、ア
ウタコア３０は収容後に拡開してケース６０の内壁面に
密着するので、組付が容易であり良好な作業性が得られ
る。As described above, the outer core 30 of the ignition coil 1 for an internal combustion engine is formed by bending the silicon steel plate SP into a cylindrical shape, which is reduced in diameter and inserted into the case 60. When expanded, it comes into close contact with the inner wall surface of the case 30. At this time, since the outer core 30 is set so that a gap is formed in the circumferential direction, the case 6
The dimensional tolerance of the inner diameter of 0 can be easily absorbed. Therefore, it is not necessary to set the gap between them in advance, and it is possible to reduce the size in the radial direction. Moreover, when the outer core 30 is housed in the case 60 in a reduced diameter state, the outer core 30 expands after housing and comes into close contact with the inner wall surface of the case 60, so that the assembly is easy and good workability is obtained. .
【００２４】[0024]
【発明の効果】本発明は上述のように構成されているの
で以下に記載の効果を奏する。即ち、本発明の内燃機関
用点火コイルにおいては、円筒容器内に収容する円筒部
材が、磁性体の矩形の平板を円筒状に折曲して成り、こ
の平板が、円筒容器内に収容したとき円筒部材の周方向
に所定の間隙が形成される大きさに形成されているの
で、円筒容器の内径の寸法公差を容易に吸収することが
でき、両者間の間隙を予め設定しておく必要がないので
径方向の小型化が可能となる。また、円筒部材の組付に
当たっては、これを縮径した状態で円筒容器内に収容す
れば、収容後に拡開して円筒容器の内壁面に密着するの
で、組付が容易であり良好な作業性が得られる。Since the present invention is configured as described above, the following effects can be obtained. That is, in the ignition coil for an internal combustion engine of the present invention, the cylindrical member housed in the cylindrical container is formed by bending a rectangular flat plate of a magnetic material into a cylindrical shape, and the flat plate is housed in the cylindrical container. Since the cylindrical member is formed in such a size that a predetermined gap is formed in the circumferential direction, the dimensional tolerance of the inner diameter of the cylindrical container can be easily absorbed, and it is necessary to preset the gap between the two. Since it does not exist, the size can be reduced in the radial direction. Also, when assembling the cylindrical member, if it is housed in a cylindrical container in a reduced diameter state, it expands after housing and adheres to the inner wall surface of the cylindrical container, so assembly is easy and good work is performed. Sex is obtained.
【図１】本発明の一実施形態に係る内燃機関用点火コイ
ルのコイル部の縦断面図である。FIG. 1 is a vertical cross-sectional view of a coil portion of an ignition coil for an internal combustion engine according to an embodiment of the present invention.
【図２】本発明の一実施形態に係る内燃機関用点火コイ
ルのコイル部の横断面図である。FIG. 2 is a cross-sectional view of a coil portion of an internal combustion engine ignition coil according to an embodiment of the present invention.
【図３】本発明の一実施形態におけるアウタコアの斜視
図である。FIG. 3 is a perspective view of an outer core according to an embodiment of the present invention.
【図４】本発明の一実施形態におけるインナコアの平面
図である。FIG. 4 is a plan view of the inner core according to the embodiment of the present invention.
【図５】本発明の一実施形態におけるインナコアの縦断
面図である。FIG. 5 is a vertical sectional view of an inner core according to an embodiment of the present invention.
【図６】本発明の一実施形態におけるインナコアの側面
図である。FIG. 6 is a side view of the inner core according to the embodiment of the present invention.
【図７】本発明の一実施形態に係るインナコアの横断面
図である。FIG. 7 is a cross-sectional view of the inner core according to the embodiment of the present invention.
【図８】本発明の一実施形態に係る内燃機関用点火コイ
ルの斜視図である。FIG. 8 is a perspective view of an internal combustion engine ignition coil according to an embodiment of the present invention.
１ 内燃機関用点火コイル １０ インナコア（柱状部材） １１ 一次ボビン １２ 一次コイル １３ 樹脂部 ２０ 二次コイルアセンブリ ２１ 二次ボビン ２２ 二次コイル ３０ アウタコア（円筒部材） ４０ 補助コア ５０ 永久磁石 ６０ ケース（円筒容器） DESCRIPTION OF SYMBOLS 1 Ignition coil for internal combustion engine 10 Inner core (columnar member) 11 Primary bobbin 12 Primary coil 13 Resin part 20 Secondary coil assembly 21 Secondary bobbin 22 Secondary coil 30 Outer core (cylindrical member) 40 Auxiliary core 50 Permanent magnet 60 Case (cylindrical) container)
Claims (1)
コイルを装着し、磁性体の円筒部材の中空部内に収容す
る内燃機関用点火コイルにおいて、前記円筒部材を収容
する円筒容器を備え、前記円筒部材が、磁性体の矩形の
平板を円筒状に折曲して成り、前記円筒容器内に収容し
たとき前記円筒部材の周方向に所定の間隙が形成される
大きさに、前記平板を形成することを特徴とする内燃機
関用点火コイル。1. An ignition coil for an internal combustion engine in which a primary coil and a secondary coil are mounted on a magnetic columnar member and is housed in a hollow portion of a magnetic cylindrical member, comprising a cylindrical container for housing the cylindrical member, The cylindrical member is formed by bending a rectangular flat plate of a magnetic material into a cylindrical shape, and the flat plate is sized so that a predetermined gap is formed in the circumferential direction of the cylindrical member when housed in the cylindrical container. An ignition coil for an internal combustion engine characterized by being formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7352790A JPH09186030A (en) | 1995-12-27 | 1995-12-27 | Ignition coil of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7352790A JPH09186030A (en) | 1995-12-27 | 1995-12-27 | Ignition coil of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09186030A true JPH09186030A (en) | 1997-07-15 |
Family
ID=18426463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7352790A Pending JPH09186030A (en) | 1995-12-27 | 1995-12-27 | Ignition coil of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09186030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203030A (en) * | 2005-01-21 | 2006-08-03 | Diamond Electric Mfg Co Ltd | Ignition coil for internal combustion engine and automobile |
-
1995
- 1995-12-27 JP JP7352790A patent/JPH09186030A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203030A (en) * | 2005-01-21 | 2006-08-03 | Diamond Electric Mfg Co Ltd | Ignition coil for internal combustion engine and automobile |
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