JP3307608B2 - Iron core of ignition coil for internal combustion engine - Google Patents
Iron core of ignition coil for internal combustion engineInfo
- Publication number
- JP3307608B2 JP3307608B2 JP14420399A JP14420399A JP3307608B2 JP 3307608 B2 JP3307608 B2 JP 3307608B2 JP 14420399 A JP14420399 A JP 14420399A JP 14420399 A JP14420399 A JP 14420399A JP 3307608 B2 JP3307608 B2 JP 3307608B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- iron core
- outer ring
- ignition coil
- coil
- 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 - Fee Related
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば自動車の
エンジンなどの内燃機関の点火プラグに高電圧を供給し
て火花放電を生じさせるための点火コイルの閉磁路型鉄
心体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed magnetic circuit type iron core of an ignition coil for generating a spark discharge by supplying a high voltage to a spark plug of an internal combustion engine such as an automobile engine.
【０００２】[0002]
【従来の技術】無端状の外環鉄心部と、上記外環鉄心部
が囲む内部を横切り、同心状に嵌合した１次、２次両コ
イルを貫通して支持するセンタ鉄心部とからなる内燃機
関用点火コイルの鉄心体は従来から公知である。この鉄
心体は、センタ鉄心部が貫通して支持する１次コイルの
ボビンの内周と、上記１次コイルの外に嵌合した２次コ
イルの外周を通る閉磁路の磁気回路を構成する。2. Description of the Related Art An endless outer ring core portion and a center core portion which traverses the interior surrounded by the outer ring core portion and penetrates and supports both primary and secondary coils fitted concentrically. 2. Description of the Related Art An iron core of an ignition coil for an internal combustion engine is conventionally known. This iron core constitutes a magnetic circuit of a closed magnetic path that passes through the inner circumference of the bobbin of the primary coil that the center core portion penetrates and supports, and the outer circumference of the secondary coil fitted outside the primary coil.
【０００３】上記閉磁路鉄心体を使用した点火コイルで
は、センタ鉄心部の少なくとも一端部と、該端部が対向
する外環鉄心部の内面との間に、鉄心体の閉磁路と直列
に永久磁石の薄片を配設して鉄心体に磁気バイアスをか
けることができるようにし、これにより１次コイルへの
電流遮断時、鉄心体の磁束の変化量を大きくして点火コ
イルの出力を高めることができる。[0003] In an ignition coil using the above-mentioned closed magnetic circuit core, between at least one end of the center iron core and the inner surface of the outer ring iron core opposed to the end, the permanent magnet is permanently connected in series with the closed magnetic circuit of the iron core. A thin magnetic piece can be provided to apply a magnetic bias to the iron core, thereby increasing the amount of change in the magnetic flux of the iron core and increasing the output of the ignition coil when current is interrupted to the primary coil. Can be.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、外環鉄
心部とセンタ鉄心部とが組立てられている状態で、外環
鉄心部の内面と、この内面に対向したセンタ鉄心部の端
部との間に永久磁石の薄片を配置するには、永久磁石の
薄片を打ち込まねばならないが、永久磁石の薄片は脆い
ため破損したり、角（かど）が欠けたりして、鉄心体の
不良品が生じる。However, when the outer ring core and the center core are assembled, the gap between the inner surface of the outer ring core and the end of the center core facing the inner surface is determined. In order to dispose the permanent magnet flakes, the permanent magnet flakes must be driven in. However, since the permanent magnet flakes are brittle, they are damaged or lack corners, resulting in defective cores.
【０００５】[0005]
【課題を解決するための手段】本発明は、上述のような
問題点を無くして永久磁石の薄片を配置できるようにし
たもので、無端状の外環鉄心部と、上記外環鉄心部が囲
む内部を横切り、同心状に嵌合した１次、２次両コイル
を貫通して支持するセンタ鉄心部とからなり、前記外環
鉄心部の内面と、この内面に対向する上記センタ鉄心部
の少なくとも一端部との間に永久磁石の、斜面を有する
楔形の薄片を介在させたことを特徴とする。SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned problems and allows a thin section of a permanent magnet to be disposed. An endless outer ring core and the outer ring core are provided. A center core portion traversing the surrounding interior and penetrating and supporting both the primary and secondary coils fitted concentrically; an inner surface of the outer ring core portion; and a center core portion facing the inner surface. A wedge-shaped thin piece having a slope of a permanent magnet is interposed between at least one end thereof.
【０００６】[0006]
【発明の実施の形態】図１〜３は外環鉄心部１１をＯ形
鉄心、センタ鉄心部１２をＩ形鉄心で構成した本発明の
鉄心体の実施形態を示す。各図において、Ｉ形鉄心は短
冊形でＯ形鉄心が囲む内部に直径方向に配置され、その
各端部１２′，１２′は前記Ｏ形鉄心の内面１１′に２
個所で対向する。そして、Ｉ形鉄心は２次コイル２のボ
ビンの内周に同心状に嵌合した１次コイル１のボビンの
内周を貫通して両コイル１，２を支持する。1 to 3 show an embodiment of an iron core body according to the present invention in which an outer ring core portion 11 is constituted by an O-shaped core and a center core portion 12 is constituted by an I-shaped core. In each of the figures, the I-shaped iron core is a strip and is arranged diametrically inside the O-shaped iron core, and each end 12 ', 12' of the O-shaped iron core has an inner surface 11 '.
Oppose at each point. Then, the I-shaped iron core penetrates the inner periphery of the bobbin of the primary coil 1 fitted concentrically to the inner periphery of the bobbin of the secondary coil 2 to support both the coils 1 and 2.
【０００７】外環鉄心部１１の内面１１′と、この内面
１１′に対向するセンタ鉄心部１２の端部１２′，１
２′の一方又は双方との間に、センタ鉄心部の端部１
２′の断面と同形同大の永久磁石の薄片１３を打込んで
介在させる。The inner surface 11 'of the outer ring core 11 and the ends 12', 1 of the center core 12 facing the inner surface 11 '.
2 ′ between one or both ends 1
A thin section 13 of a permanent magnet having the same shape and the same size as the cross section 2 'is inserted and interposed.
【０００８】この永久磁石の薄片１３の、センタ鉄心部
の端部１２′と、この端部が対向する外環鉄心部の内面
１１′の間に打込む先端部は片側の厚さを先端に向かっ
て薄くして斜面１３′にした楔形にしてある。尚、斜面
１３′を有する楔形の先端部を、図１（Ｃ）に示す如く
薄片１３の両端に形成すると、永久磁石の薄片１３をど
ちらの先端部からでもセンタ鉄心部の端部と外環鉄心部
の内面との間に打込むことができる。The tip of the thin piece 13 of the permanent magnet which is driven between the end 12 'of the center core and the inner surface 11' of the outer ring core facing the end has a thickness on one side. The wedge shape is made thinner toward the slope 13 '. When a wedge-shaped tip having a slope 13 'is formed at both ends of the thin piece 13 as shown in FIG. 1C, the thin piece 13 of the permanent magnet can be attached to the end of the center core and the outer ring from either tip. It can be driven between the inner surface of the iron core.
【０００９】このように、センタ鉄心部の少なくとも一
端部１２′と、この一端部が対向する外環鉄心部の内面
１１′との間に先端部から打込む永久磁石の薄片１３の
上記先端部は片側の厚さを薄く斜面１３′にした楔形に
形成してあるので、破損したり、角（かど）を欠くこと
なく打込み、点火コイルに使用したときその出力を高め
ることができる。As described above, the above-mentioned tip portion of the thin piece 13 of permanent magnet which is driven from the tip portion between at least one end portion 12 'of the center core portion and the inner surface 11' of the outer ring core portion facing this one end portion. Is formed in a wedge shape with one side having a thin slope 13 ', so that it can be driven without breakage or lack of corners, and its output can be increased when used for an ignition coil.
【００１０】外環鉄心部１１とセンタ鉄心部１２は図
１，２に示すように夫々所定の形状に打抜いた硅素鋼板
の積層体でもよい。そして、外環鉄心部１１は複数の鉄
心片の積層体、図２では１１ａ，１１ｂの２つを、例え
ばΩ形の凹凸係合部１４で無端状に連結してもよい。勿
論、無端状に連結する鉄心の積層体の数は２つに限定さ
れず、３つ、又はそれ以上でもよい。更に、図３に示す
ように、外環鉄心部１１は、長尺の硅素鋼板の帯板を渦
状に巻いて無端状に形成し、センタ鉄心部１２を硅素鋼
板の積層体で構成してもよい。As shown in FIGS. 1 and 2, the outer ring core portion 11 and the center core portion 12 may be laminated bodies of silicon steel sheets punched into predetermined shapes. The outer ring core 11 may be connected to a laminated body of a plurality of core pieces, two of 11a and 11b in FIG. Needless to say, the number of the laminated bodies of the iron cores connected endlessly is not limited to two, and may be three or more. Further, as shown in FIG. 3, the outer ring core portion 11 may be formed by winding a long strip of silicon steel plate in an endless manner to form an endless shape, and the center core portion 12 may be formed of a laminate of silicon steel plates. Good.
【００１１】図４は欠環部を有するＣ形鉄心１６と、上
記Ｃ形鉄心の欠環部１６′を補完する外側片１８、及び
この外側片と一体の中央脚片１９を有するＴ形鉄心１７
とで本発明の鉄心体を構成した他の実施形態を示す。FIG. 4 shows a T-shaped iron core having a C-shaped iron core 16 having a broken ring portion, an outer piece 18 for complementing the broken ring portion 16 'of the C-shaped iron core, and a central leg piece 19 integral with the outer piece. 17
Shows another embodiment in which the iron core body of the present invention is configured.
【００１２】中央脚片１９を１次コイル、２次コイルに
貫通して両コイルを支持したのち、Ｃ形鉄心１６と、そ
の欠環部１６′を補完するＴ形鉄心の外側片１８をΩ形
の凹凸係合部で連結してもよいし、溶接、接着などの手
段で連結してもよく、これによりＣ形鉄心と、Ｔ形鉄心
の外側片が無端状の外環鉄心部１１を形成する。そし
て、Ｔ形鉄心の中央脚片１９はセンタ鉄心部１２を構成
し、その一端は外側片１８と一体であるが、他端部はＣ
形鉄心の内面と対向する。After penetrating the center leg piece 19 through the primary coil and the secondary coil to support both coils, the C-shaped iron core 16 and the outer piece 18 of the T-shaped iron core complementing the lacked ring portion 16 'are connected to the Ω. It may be connected by means of a concave / convex engaging portion, or by means of welding, bonding or the like, whereby the C-shaped core and the outer piece of the T-shaped core are connected to the endless outer ring core 11. Form. The central leg piece 19 of the T-shaped iron core constitutes the center iron core portion 12, one end of which is integral with the outer piece 18, while the other end is formed of C
It faces the inner surface of the iron core.
【００１３】従って、この実施形態の場合は、Ｔ形鉄心
の中央脚片１９の他端部１２′と、これに対向するＣ形
鉄心の内面１１′との間に、中央脚片１９の他端部の断
面と同形、同大の永久磁石の薄片１３を打込む。Therefore, in the case of this embodiment, between the other end 12 'of the central leg piece 19 of the T-shaped iron core and the inner surface 11' of the C-shaped iron core opposed thereto, the other of the central leg piece 19 is provided. A thin piece 13 of a permanent magnet having the same shape and the same size as the cross section of the end is driven.
【００１４】又、図５は中央脚片２１′を有するＥ形鉄
心２０と、Ｉ形鉄心２２とで本発明の鉄心体を構成した
実施形態を示す。この場合、Ｅ形鉄心２０の２つの脚２
１，２１を有するコ字形部と、Ｉ形鉄心２２とが外環鉄
心部１１を形成し、Ｅ形鉄心の中央脚片２１′がセンタ
鉄心部１２を形成するので、１次コイル、２次コイルに
中央脚片２１′を貫通して支持したのち、Ｅ形鉄心の２
つの脚２１，２１とＩ形鉄心２２とをΩ形凹凸係合部
や、溶接、接着などで固定し、Ｉ形鉄心の内面１１′
と、この内面に対向して接続する中央脚片２１′の端部
１２′との間に中央脚片２１の断面と同形、同大の永久
磁石の薄片１３を打込む。FIG. 5 shows an embodiment in which an E-shaped iron core 20 having a central leg piece 21 'and an I-shaped iron core 22 constitute an iron core of the present invention. In this case, the two legs 2 of the E-shaped core 20
Since the U-shaped portion having the U-shaped portions 1, 21 and the I-shaped core 22 form the outer ring core portion 11 and the center leg piece 21 'of the E-shaped core forms the center core portion 12, the primary coil, the secondary coil After penetrating and supporting the center leg piece 21 ′ in the coil, the E-shaped core 2
The two legs 21 and 21 and the I-shaped iron core 22 are fixed by an Ω-shaped concave / convex engaging portion, welding, bonding, or the like, and the inner surface 11 ′ of the I-shaped iron core is fixed.
Then, a thin piece 13 of a permanent magnet having the same shape and the same size as the cross section of the central leg piece 21 is driven between the central leg piece 21 'and the end 12' of the central leg piece 21 'facing and connected to the inner surface.
【００１５】図４，図５の場合も、永久磁石の薄片１３
の一方或いは両方の先端部を、段落０００８で述べ、且
つ図１（Ｂ）、（Ｃ）に示したように、片側の厚さを先
端に向かって薄くした斜面１３′にしておくと打込み易
い。FIGS. 4 and 5 also show the permanent magnet thin section 13.
If one or both of the tips are described in paragraph 0008, and as shown in FIGS. 1B and 1C, it is easy to drive if one side has a slope 13 'whose thickness is reduced toward the tip. .
【００１６】図示の各実施形態で明らかなように、無端
状の外環鉄心部１１の平面形状は円形のリングであるこ
とに限定されず四角形等の多角形であってもよい。As is apparent from the illustrated embodiments, the planar shape of the endless outer ring core 11 is not limited to a circular ring but may be a polygon such as a quadrangle.
【００１７】そして、永久磁石の薄片１３を１次コイル
のボビンの中空部の巻線部で包まれた内部に位置させる
と、永久磁石の薄片からの洩れ磁束が１次コイルと鎖交
し、１次コイルの磁束を弱めて出力を低下させるので、
永久磁石の薄片は１次コイル、２次コイルのボビンの内
部の、巻線部で囲まれた外に位置させておく。When the thin piece 13 of the permanent magnet is positioned inside the hollow portion of the bobbin of the primary coil surrounded by the winding portion, the leakage magnetic flux from the thin piece of the permanent magnet interlinks with the primary coil, Since the output is reduced by weakening the magnetic flux of the primary coil,
The thin section of the permanent magnet is located inside the bobbin of the primary coil and the secondary coil, outside and surrounded by the winding portion.
【００１８】上記各実施形態において、センタ鉄心部の
一端部と、該端部が対向する外環鉄心部の内面との間に
永久磁石の薄片１３を介在させて鉄心体に磁気バイアス
をかけ、１次コイルへの電流遮断時に鉄心体の磁束の変
化量を大きくして点火コイルに使用した場合に、点火コ
イルの出力を高めるには、薄片１３のセンタ鉄心部の一
端部に向いた面の磁極、及び外環鉄心の内面に向いた面
の磁極は、１次コイルに通電したときに作られる磁束と
は逆の磁束を発生するように定めねばならない。In each of the above embodiments, a magnetic bias is applied to the iron core by interposing a thin piece of permanent magnet 13 between one end of the center core and the inner surface of the outer ring core facing the end, To increase the output of the ignition coil when increasing the amount of change in the magnetic flux of the iron core when interrupting the current to the primary coil and using it for the ignition coil, the surface of the thin piece 13 facing the one end of the center iron core should be The magnetic pole and the magnetic pole on the surface facing the inner surface of the outer ring core must be determined so as to generate a magnetic flux opposite to the magnetic flux generated when the primary coil is energized.
【００１９】この場合、本発明では、薄片１３は片側の
厚さを先端に向かって薄くした斜面１３′を有するの
で、斜面１３′を有する面の磁極と、斜面がない反対の
面の磁極とを予め定めておき、それら磁極がセンタ鉄心
部の一端部と、外環鉄心部の内面とに向くように薄片１
３を打込めばよく、薄片１３の各面に磁極を示すマーク
を表示しておく必要が無いと共に、磁極を逆にして反対
に薄片を打込む作業ミスを防ぐこともできる。In this case, according to the present invention, since the thin piece 13 has the slope 13 'whose one side is reduced in thickness toward the tip, the magnetic pole on the side having the slope 13' and the magnetic pole on the opposite side having no slope are provided. Are determined in advance, and the thin section 1 is placed so that the magnetic poles face one end of the center core portion and the inner surface of the outer ring core portion.
3, it is not necessary to display a mark indicating the magnetic pole on each surface of the thin piece 13, and it is also possible to prevent a mistake in reversing the magnetic pole and driving the thin piece.
【００２０】この発明による鉄心体の外環鉄心部１１
は、後述の点火コイルの合成樹脂製絶縁ケースの内面と
一体に固定されるように外環鉄心部の回りに絶縁ケース
をインサートモールドで成形してもよいし、絶縁ケース
を単独で成形し、その内面に接着などで外環鉄心部を固
定してもよい。Outer ring core portion 11 of the iron core body according to the present invention
The insulating case may be molded by insert molding around the outer ring core so as to be integrally fixed to the inner surface of the synthetic resin insulating case of the ignition coil described later, or the insulating case may be formed by itself, The outer ring core may be fixed to the inner surface by bonding or the like.
【００２１】図６は本発明に依る鉄心体を使用して点火
コイルを構成し、その点火コイルをエンジンに装着した
状態の概略を示す。点火コイルを構成するには、鉄心体
１０を合成樹脂などで成形された絶縁ケース３０の内部
に１次コイル１、２次コイル２と共に水平に収め、ケー
ス中に真空注型した熱硬化性の絶縁樹脂、例えば熱硬化
性エポキシ樹脂で固定する。具体的には、上記絶縁ケー
ス３０は高圧端子３５を内部に取付けた高圧筒部３６が
底から下向きに突出する下方カップ部３１と、下部カッ
プの上端から張出して前記鉄心体の無端状外環鉄心部１
１を載置する鍔３３、及びこの鍔３３の周りから外環鉄
心部よりも高く起ち上がった周囲壁３４（図１〜５も参
照）とからなる鉄心収容部３２と、上記周囲壁３４の上
部側面に設けられた１次端子のソケット部３７とを有
し、１次コイル１の電線を上記ソケット部３７の１次端
子に、２次コイルの巻終わり電線を高圧端子３５に夫々
接続したのち、絶縁樹脂を真空注型し、その固化した樹
脂層３８でケース中に鉄心体、１次、２次両コイル、高
圧端子、１次端子を固定する。これにより小型でありな
がら高出力の点火コイルが得られる。FIG. 6 schematically shows a state in which an ignition coil is formed by using an iron core according to the present invention, and the ignition coil is mounted on an engine. In order to construct the ignition coil, the iron core body 10 is horizontally placed together with the primary coil 1 and the secondary coil 2 in an insulating case 30 formed of a synthetic resin or the like, and is vacuum-cast into the case. It is fixed with an insulating resin, for example, a thermosetting epoxy resin. Specifically, the insulating case 30 includes a lower cup portion 31 in which a high-pressure cylinder portion 36 having a high-voltage terminal 35 mounted inside projects downward from the bottom, and an endless outer ring of the iron core body extending from the upper end of the lower cup. Iron core 1
1 and a peripheral wall 34 (see also FIGS. 1 to 5) rising from the periphery of the flange 33 to a height higher than the outer ring core, and the peripheral wall 34. And a primary terminal socket portion 37 provided on the upper side surface, and the electric wire of the primary coil 1 is connected to the primary terminal of the socket portion 37, and the winding end wire of the secondary coil is connected to the high voltage terminal 35, respectively. Thereafter, the insulating resin is vacuum-injected, and the iron core, the primary and secondary coils, the high voltage terminal, and the primary terminal are fixed in the case with the solidified resin layer 38. As a result, a small-sized, high-output ignition coil can be obtained.
【００２２】必要ならば、鍔３３の内周に外環鉄心部１
１の内周に沿う起立壁３９を、外環鉄心部の厚さないし
高さよりも少し高く設けておいてもよい。その場合、起
立壁３９にはセンタ鉄心部１２の両端部が通る切欠き３
９′，３９′を形成しておく（図１〜５も参照）。If necessary, the outer ring core 1
The upright wall 39 along the inner periphery of 1 may be provided slightly higher than the thickness or height of the outer ring core. In this case, the notch 3 through which both ends of the center iron core 12 pass is formed in the upright wall 39.
9 'and 39' are formed in advance (see also FIGS. 1 to 5).
【００２３】エンジン４０には、シリンダ毎のプラグホ
ール４１に連通する連通孔４２を備えたロッカーカバー
４３を固定する。ロッカーカバー４３は連通孔４２の回
りの筒部４４の上端に設けられた皿部４５を一体に有
し、連通孔４２は皿部４５の底に開口するが、その開口
の回りにはシール部４６が皿部の底から無端状に***す
る。A rocker cover 43 having a communication hole 42 communicating with a plug hole 41 for each cylinder is fixed to the engine 40. The rocker cover 43 integrally has a plate portion 45 provided at the upper end of the cylindrical portion 44 around the communication hole 42, and the communication hole 42 opens at the bottom of the dish portion 45. 46 protrudes endlessly from the bottom of the dish.
【００２４】上記点火コイルをロッカーカバー４３に固
定し、点火コイルの高圧端子３５に誘起された高電圧を
プラグホール４１の底に取付けてある点火プラグ４７の
頂部端子４８に供給するには高圧ジョイント５０を使用
する。高圧ジョイントは、点火コイルの高圧筒部３６、
下方カップ部３１を内周に弾力的に保持して鍔３３の下
面に当接すると共に、前記ロッカーカバーのシール部４
６の内周に弾力的に嵌入してシール部４６に被さり、プ
ラグホールと連通したロッカーカバーの連通孔４２の上
端を塞ぐ折返し片５２を備えた上部ソケット５１と、プ
ラグホールの底に取付けられた点火プラグの頂部端子４
８を有する上部に弾力的に被さる下部ソケット５３と、
上記上部ソケット５１と下部ソケット５３とを連結する
中継筒５４と、上部ソケット、中継筒、下部ソケット中
に上下方向に支持され、点火コイルの高圧端子３５と点
火プラグの頂部端子４８とを電気的に接続する導電部材
５５、例えば金属コイルスプリングとから構成されてい
る。In order to fix the ignition coil to the rocker cover 43 and supply the high voltage induced at the high voltage terminal 35 of the ignition coil to the top terminal 48 of the ignition plug 47 mounted on the bottom of the plug hole 41, a high pressure joint is used. Use 50. The high-pressure joint is a high-pressure cylinder 36 of the ignition coil,
The lower cup portion 31 is elastically held on the inner periphery, abuts against the lower surface of the flange 33, and the seal portion 4 of the rocker cover is provided.
An upper socket 51 provided with a folded piece 52 that elastically fits into the inner periphery of the plug 6, covers the seal portion 46, and covers the upper end of the communication hole 42 of the rocker cover that communicates with the plug hole, and is attached to the bottom of the plug hole. Top terminal 4 of spark plug
A lower socket 53 which resiliently covers the upper part having 8;
A relay cylinder 54 connecting the upper socket 51 and the lower socket 53, and a high-voltage terminal 35 of the ignition coil and a top terminal 48 of the ignition plug, which are supported vertically in the upper socket, the relay cylinder, and the lower socket, electrically connect the relay cylinder 54 to the upper socket, the relay cylinder, and the lower socket. , For example, a metal coil spring.
【００２５】上部ソケット５１、下部ソケット５３は合
成ゴム、弾性に富む合成樹脂で成形し、中継筒５４は通
常の合成樹脂で成形する。そして、中継筒５４の上下の
各端部は上部ソケットや下部ソケットの内周に環状突起
と環状溝からなるスナップ装置を係合させてスナップ嵌
めで連結するか、接着剤などで連結して組立てる。The upper socket 51 and the lower socket 53 are formed of synthetic rubber and synthetic resin having high elasticity, and the relay cylinder 54 is formed of ordinary synthetic resin. The upper and lower ends of the relay cylinder 54 are connected to each other by snap-fitting by engaging a snap device including an annular projection and an annular groove on the inner periphery of the upper socket and the lower socket, or by connecting with an adhesive or the like. .
【００２６】これにより高圧ジョイントの上部ソケット
５１を点火コイルの高圧筒部３６、下方カップ部３１に
下から嵌めて点火コイルを上部ソケットに取付け、それ
から高圧ジョイントを下部ソケット５３からプラグホー
ル４１の内部に挿入し、下部ソケットを点火プラグ４７
の上部に弾性的に被せると同時に上部ソケットを連通孔
４２のシール部４６の内周に嵌めながら折返し片５２を
シール部４６に被せ、上部ソケットごと点火コイルをロ
ッカーカバー４３に固定し、点火コイルの高圧端子３５
と点火プラグ４７の頂部端子４８を導電部材５５で電気
的に接続する。Thus, the upper socket 51 of the high-pressure joint is fitted into the high-pressure cylinder 36 of the ignition coil and the lower cup 31 from below, and the ignition coil is mounted on the upper socket. And the lower socket is
At the same time, the folded piece 52 is put on the seal portion 46 while fitting the upper socket to the inner periphery of the seal portion 46 of the communication hole 42 at the same time as the upper socket is fitted, and the ignition coil is fixed to the rocker cover 43 together with the upper socket. High voltage terminal 35
And the top terminal 48 of the ignition plug 47 is electrically connected by a conductive member 55.
【００２７】この状態で点火コイルの下方カップ部３１
はロッカーカバーの内部に入り、その底から下向きに突
出する高圧筒部３６はプラグホール４１に突入するの
で、ロッカーカバーの上面から外に突出する点火コイル
の露出部の占有面積は小さくなり、点火コイルが小型で
あることゝ相俟ってエンジンルームのスペースの減少化
に役立つ。In this state, the lower cup 31 of the ignition coil
Enters the inside of the rocker cover, and the high-pressure cylinder portion 36 projecting downward from the bottom thereof enters the plug hole 41, so that the occupied area of the exposed portion of the ignition coil projecting outward from the upper surface of the rocker cover decreases, The small size of the coil helps reduce the space in the engine room.
【００２８】[0028]
【発明の効果】本発明により無端状の外環鉄心部と、１
次コイル、２次コイルを貫通して支持し、上記外環鉄心
部が囲む内部を横切るセンタ鉄心部の端部との間に、点
火コイルの出力を高める永久磁石の薄片を斜面を有する
楔形にして打込むようにしたので、脆い永久磁石の薄片
を破損したり、角（かど）を欠けたりすることなく容易
に打込むことができる。又、打込む際に薄片の両面の磁
極をセンタ鉄心部の端部と外環鉄心部の内面に正確に向
けることができるので、薄片の各面に磁極のマークを印
刷などで表示する手数が省けると共に、磁極を間違える
ことなく正確に打込むことができる。According to the present invention, an endless outer ring core and 1
A thin piece of a permanent magnet for enhancing the output of the ignition coil is formed in a wedge shape having a slope between a secondary coil, a secondary coil, and an end portion of a center core portion which passes through and is supported by the outer ring core portion and crosses the inside surrounded by the outer ring core portion. Since the permanent magnets are driven in, the thin pieces of the fragile permanent magnet can be easily driven without breaking or cutting off corners. In addition, since the magnetic poles on both sides of the flake can be accurately directed to the end of the center core and the inner surface of the outer ring core when driving, it is necessary to print the magnetic pole mark on each surface of the flake by printing or the like. It can be omitted and the magnetic pole can be accurately driven without making a mistake.
【図１】（Ａ）は本発明の鉄心体の第１実施形態の平面
図、（Ｂ）は同上のａ−ａ断面の拡大図、（Ｃ）は平面
図が第１実施形態と同じ鉄心体の第２実施形態の図１
（Ａ）のａ−ａ断面の拡大図。1A is a plan view of a first embodiment of an iron core body of the present invention, FIG. 1B is an enlarged view of an aa cross section of the same, and FIG. 1C is a core whose plan view is the same as that of the first embodiment. FIG. 1 of a second embodiment of the body
The enlarged view of the aa cross section of (A).
【図２】本発明の鉄心体の第３実施形態の平面図。FIG. 2 is a plan view of a third embodiment of the iron core body of the present invention.
【図３】（Ａ）は本発明の鉄心体の第４実施形態の平面
図、（Ｂ）は同上のｂ−ｂ断面の拡大図。FIG. 3A is a plan view of a fourth embodiment of an iron core body of the present invention, and FIG. 3B is an enlarged view of a bb cross section of the same.
【図４】本発明の鉄心体の第５実施形態の平面図。FIG. 4 is a plan view of a fifth embodiment of the iron core body of the present invention.
【図５】本発明の鉄心体の第６実施形態の平面図。FIG. 5 is a plan view of a sixth embodiment of the iron core body of the present invention.
【図６】本発明の鉄心体を組込んだ点火コイルと、この
点火コイルをエンジンに装着した状態の概略断面図。FIG. 6 is a schematic cross-sectional view of an ignition coil incorporating the iron core body of the present invention and a state in which the ignition coil is mounted on an engine.
１１ 無端状の外環鉄心部 １１′ 無端状の外環鉄心部の内面 １２ センタ鉄心部 １２′ センタ鉄心部の、外環鉄心部の内面と対向して
接続する端部 １３ 永久磁石片 １３′ 永久磁石片の楔形の斜面 ２２ 高圧筒 ２３ １次ソケットReference Signs List 11 Endless outer ring core 11 'Inner surface of endless outer ring core 12 Center core 12' End of center core facing and connected to inner surface of outer ring core 13 Permanent magnet piece 13 ' Wedge-shaped slope of permanent magnet piece 22 High-pressure cylinder 23 Primary socket
Claims (1)
が囲む内部を横切り、同心状に嵌合した１次、２次両コ
イルを貫通して支持するセンタ鉄心部とからなり、前記
外環鉄心部の内面と、この内面に対向する上記センタ鉄
心部の少なくとも一端部との間に永久磁石の、斜面を有
する楔形の薄片を介在させたことを特徴とする内燃機関
用点火コイルの鉄心体。1. An endless outer ring core, and a center core that traverses the interior surrounded by the outer ring core and penetrates and supports both primary and secondary coils fitted concentrically. An ignition for an internal combustion engine, wherein a wedge-shaped thin piece having an inclined surface of a permanent magnet is interposed between an inner surface of the outer ring core and at least one end of the center core facing the inner surface. Core body of coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14420399A JP3307608B2 (en) | 1999-05-25 | 1999-05-25 | Iron core of ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14420399A JP3307608B2 (en) | 1999-05-25 | 1999-05-25 | Iron core of ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000331853A JP2000331853A (en) | 2000-11-30 |
| JP3307608B2 true JP3307608B2 (en) | 2002-07-24 |
Family
ID=15356631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14420399A Expired - Fee Related JP3307608B2 (en) | 1999-05-25 | 1999-05-25 | Iron core of ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3307608B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005048544A1 (en) * | 2005-10-11 | 2007-04-12 | Robert Bosch Gmbh | Magnetic circuit for ignition coil has outer core as strip placed round inner rod-like core with its thickness perpendicular to longitudinal direction of inner core |
-
1999
- 1999-05-25 JP JP14420399A patent/JP3307608B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000331853A (en) | 2000-11-30 |
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