JP2010014042A

JP2010014042A - Ignition coil for internal combustion engine

Info

Publication number: JP2010014042A
Application number: JP2008175399A
Authority: JP
Inventors: Yuki Tada; 祐樹多田; Hiromi Ide; 博巳井出
Original assignee: Hanshin Electric Co Ltd
Current assignee: Hanshin Electric Co Ltd
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2010-01-21

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ignition coil for internal combustion engine with a longer lifetime, capable of fabricating its spring and electric component(s) from ordinary, low-cost materials and eliminating the possibility of generating an obstacle in transmitting a high voltage to an ignition plug through a spring and electric component(s). <P>SOLUTION: The ignition coil for internal combustion engine is configured so that a protector 41 is mounted on a high voltage tower part 22t of an insulation case 22 and a high voltage generated in a secondary coil accommodated in the insulation case 22 is supplied to the ignition plug 61 through a coil spring 45 accommodated in an insulation pipe 44 of the protector 41 and with its one end connected to a resistance 33 in the high voltage tower part 22t, wherein an engaging stepped part 44s is provided orbiting inside the insulation pipe 44 mating with the other end of the coil spring 45 and a blocking piece 46 to be in contact with the stepped part 44s for generating blocking is provided at the other end of the coil spring 45. The blocking piece 46 has electric conductivity and a corrosion resistance against the moisture in the atmosphere. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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、火花放電を発生させるための高電圧を供給する内燃機関用点火コイルに関するものである。 The present invention relates to an ignition coil for an internal combustion engine that supplies a high voltage for generating spark discharge to an ignition plug of an internal combustion engine such as an automobile engine.

図６は従来の内燃機関用点火コイルの概略構成を示す一部を破断した正面図、図７は図６に示した内燃機関用点火コイルをエンジンに取り付けた状態を示す一部を破断した正面図である。 6 is a partially broken front view showing a schematic configuration of a conventional internal combustion engine ignition coil, and FIG. 7 is a partially broken front view showing a state where the internal combustion engine ignition coil shown in FIG. 6 is attached to the engine. FIG.

図６または図７において、内燃機関用点火コイル１１は、エンジン５１に取り付けられる点火コイル本体２１と、この点火コイル本体２１を構成する絶縁ケース２２に設けられた高圧タワー部２２ｔに取り付けられ、エンジン５１に設けられたプラグホール５２の底に取り付けられた点火プラグ６１の頂部電極６２に、高圧タワー部２２ｔ内の抵抗３３からの高電圧を供給（伝達）するプロテクタ４１とで構成されている。 6 or 7, the internal combustion engine ignition coil 11 is attached to an ignition coil main body 21 attached to the engine 51 and a high-pressure tower portion 22t provided in an insulating case 22 constituting the ignition coil main body 21. A protector 41 that supplies (transmits) a high voltage from the resistor 33 in the high-voltage tower section 22t to the top electrode 62 of the spark plug 61 attached to the bottom of the plug hole 52 provided in 51.

上記した点火コイル本体２１は、絶縁ケース２２と、この絶縁ケース２２の側面部分に一体的に設けられたソケット部２２ｓに配置されている複数の低圧端子（一次端子、図示省略）と、絶縁ケース２２の下端部分に一体的に設けられた高圧タワー部２２ｔ内に、高圧タワー部２２ｔの孔を閉塞するように圧入された高圧端子（二次端子）２４と、絶縁ケース２２内に収容されたコイル・鉄心組立体（図示省略）と、絶縁ケース２２内に充填され、各部品相互の高電圧絶縁を行うとともに、各部品を絶縁ケース２２内に固定する絶縁樹脂としての熱硬化性樹脂（図示省略）と、高圧タワー部２２ｔ内に配置、収容されて一端（上端）が高圧端子２４に接続された、ノイズ（雑音）低減用の電気部品である抵抗３３とで構成されている。
そして、点火コイル本体２１は、絶縁ケース２２の側面部分に一体的に設けられた取付フランジ部２２ｆを取付ねじ３５によってエンジン５１の取付部５４に取り付けることにより、エンジン５１のプラグホール５２内へ高圧タワー部２２ｔが浅く突入するように取り付けられる。
なお、複数の低圧端子は、例えば、絶縁ケース２２の成形時にインサートされる。 The ignition coil main body 21 includes an insulating case 22, a plurality of low-voltage terminals (primary terminals, not shown) disposed in a socket portion 22s integrally provided on a side surface portion of the insulating case 22, and an insulating case. A high-voltage terminal (secondary terminal) 24 that is press-fitted so as to close a hole in the high-voltage tower portion 22 t in a high-voltage tower portion 22 t that is integrally provided at the lower end portion of the 22, and the insulating case 22. A coil / iron core assembly (not shown) and a thermosetting resin (illustrated) filled in the insulating case 22 to insulate the components from each other at a high voltage and fix the components in the insulating case 22. (Not shown) and a resistor 33 that is disposed and accommodated in the high-voltage tower portion 22t and has one end (upper end) connected to the high-voltage terminal 24, which is an electrical component for noise reduction.
The ignition coil body 21 has a high pressure into the plug hole 52 of the engine 51 by attaching a mounting flange portion 22f integrally provided on the side surface portion of the insulating case 22 to the mounting portion 54 of the engine 51 with a mounting screw 35. The tower portion 22t is attached so as to enter the shallow.
The plurality of low-voltage terminals are inserted, for example, when the insulating case 22 is molded.

上記したコイル・鉄心組立体は、一次コイルボビンと、この一次コイルボビンの外周に巻線を巻き付け、積層して形成された一次コイルと、この一次コイルの外周に配置された二次コイルボビンと、この二次コイルボビンの外周に巻線を巻き付け、積層して形成された二次コイルと、この二次コイルと一次コイルとを磁気的に結合し、閉磁路を形成するセンタ鉄心部、環状鉄心部からなる鉄心とで構成されている。
そして、複数の低圧端子、一次コイルの両端、二次コイルの一端は所定の回路を構成するように接続され、二次コイルの他端は、二次コイルボビンの端部に取り付けられた端末ピン（図示省略）を介して高圧端子２４に接続されている。 The coil / iron core assembly described above includes a primary coil bobbin, a primary coil formed by winding a winding around the outer periphery of the primary coil bobbin, a secondary coil bobbin disposed on the outer periphery of the primary coil, and the secondary coil bobbin. A secondary coil formed by winding a winding around the outer periphery of the secondary coil bobbin and laminating it, and a center core part and an annular core part that magnetically couple the secondary coil and the primary coil to form a closed magnetic circuit It consists of an iron core.
A plurality of low-voltage terminals, both ends of the primary coil, and one end of the secondary coil are connected to form a predetermined circuit, and the other end of the secondary coil is a terminal pin attached to the end of the secondary coil bobbin ( It is connected to the high voltage terminal 24 via a not shown).

上記したプロテクタ４１は、点火コイル本体２１の高圧タワー部２２ｔに取り付けられ、エンジン５１の環状部５３に傘部４２ｕが被さってプラグホール５２内への液体の浸入を防ぐとともに、点火コイル本体２１から供給される高電圧を絶縁シールする、シリコーンゴムなどの弾性体で構成されたラバー部４２と、プラグホール５２の底に取り付けられた点火プラグ６１の、頂部電極６２を有する絶縁碍子６４に被さって絶縁シールする、シリコーンゴムなどの弾性体で構成されたブーツ部４３と、このブーツ部４３とラバー部４２とを連結する、例えば、ポリブチレンテレフタレート（ＰＢＴ）製の絶縁パイプ４４と、この絶縁パイプ４４内に収容され、点火コイル本体２１の抵抗３３と点火プラグ６１の頂部電極６２とを導通させる導電体としてのコイルスプリング４５とで構成されている。
そして、高圧タワー部２２ｔとラバー部４２、絶縁パイプ４４とラバー部４２およびブーツ部４３とは、例えば、周回する突条と、この突条が嵌合する嵌合溝とによって結合されている。 The above-described protector 41 is attached to the high-voltage tower portion 22t of the ignition coil main body 21, and the umbrella portion 42u covers the annular portion 53 of the engine 51 to prevent the liquid from entering the plug hole 52, and from the ignition coil main body 21. Covering an insulator 64 having a top electrode 62 of a rubber portion 42 made of an elastic material such as silicone rubber, which insulates and seals the supplied high voltage, and a spark plug 61 attached to the bottom of the plug hole 52. A boot portion 43 made of an elastic material such as silicone rubber for insulation sealing, an insulation pipe 44 made of, for example, polybutylene terephthalate (PBT) for connecting the boot portion 43 and the rubber portion 42, and the insulation pipe 44, which conducts the resistance 33 of the ignition coil body 21 and the top electrode 62 of the ignition plug 61. It is composed of a coil spring 45 as a body.
And the high voltage | pressure tower part 22t and the rubber part 42, the insulation pipe 44, the rubber part 42, and the boot part 43 are couple | bonded by the protrusion groove | channel and the fitting groove which this protrusion protrudes, for example.

上記した絶縁パイプ４４には、下側内周に、コイルスプリング４５が抜けるのを防止する係止段部４４ｓを形成するための肉盛り部４４ｐが周回して設けられている。 The insulating pipe 44 is provided with a built-up portion 44p around the lower inner periphery for forming a locking step 44s for preventing the coil spring 45 from coming off.

上記したコイルスプリング４５は、太径部４５ｂの両端に細径部４５ｓが設けられ、一端（上端）が抵抗３３に接続され、太径部４５ｂの他端（下端）が絶縁パイプ４４の係止段部４４ｓに係合することにより、絶縁パイプ４４から抜けないようになされている。 In the coil spring 45 described above, the small diameter portion 45s is provided at both ends of the large diameter portion 45b, one end (upper end) is connected to the resistor 33, and the other end (lower end) of the large diameter portion 45b is engaged with the insulating pipe 44. By engaging with the stepped portion 44s, the insulating pipe 44 is prevented from being pulled out.

上記したエンジン５１には、点火コイル本体２１の高圧タワー部２２ｔ、および、この高圧タワー部２２ｔに取り付けられたプロテクタ４１が挿入されるプラグホール５２と、このプラグホール５２の上面周縁に突出させて設けられ、プロテクタ４１の傘部４２ｕで覆われる環状部５３と、この環状部５３の周囲に位置し、点火コイル本体２１の取付フランジ部２２ｆを取り付けるための取付部５４とが設けられている。
そして、プラグホール５２の底には、点火プラグ６１の雄ねじ部６５ｓを螺合させて点火プラグ６１を取り付けるための取付ねじ孔５２ｓが設けられている。 In the engine 51 described above, the high voltage tower portion 22t of the ignition coil body 21 and the plug hole 52 into which the protector 41 attached to the high pressure tower portion 22t is inserted, and the upper periphery of the plug hole 52 are projected. An annular portion 53 that is provided and covered by the umbrella portion 42 u of the protector 41 and an attachment portion 54 that is located around the annular portion 53 and for attaching the attachment flange portion 22 f of the ignition coil body 21 are provided.
An attachment screw hole 52 s for attaching the ignition plug 61 by screwing the male screw portion 65 s of the ignition plug 61 is provided at the bottom of the plug hole 52.

上記した点火プラグ６１は、高電圧が供給される頂部端子６２と、この頂部端子６２から延びた中心電極６３と、この中心電極６３および頂部端子６２を絶縁シールする絶縁碍子６４と、この絶縁碍子６４の外側に設けられた金具６５とで構成されている。
そして、金具６５には、プラグホール５２の取付ねじ孔５２ｓに螺合する雄ねじ部６５ｓと、この雄ねじ部６５ｓから延び、中心電極６３と火花間隙をおいて対向する電極６５ｅとが設けられている。 The spark plug 61 includes a top terminal 62 to which a high voltage is supplied, a center electrode 63 extending from the top terminal 62, an insulator 64 for insulating and sealing the center electrode 63 and the top terminal 62, and the insulator 64 and a metal fitting 65 provided outside 64.
The metal fitting 65 is provided with a male screw portion 65s that is screwed into the mounting screw hole 52s of the plug hole 52, and an electrode 65e that extends from the male screw portion 65s and faces the center electrode 63 with a spark gap. .

次に、内燃機関用点火コイル１１のエンジン５１への取付について簡単に説明する。
まず、図６に示した内燃機関用点火コイル１１を、図７に示すように、ブーツ部４３側からエンジン５１のプラグホール５２内へ挿入する。
そして、ブーツ部４３内に点火プラグ６１の頂部電極６２および絶縁碍子６４を挿入して嵌合させ、ラバー部４２の傘部４２ｕを環状部５３に被せるとともに、取付部５４の上に絶縁ケース２２の取付フランジ部２２ｆを位置させると、コイルスプリング４５の下端が頂部電極６２に接触してコイルスプリング４５が少し縮むことにより、コイルスプリング４５と頂部電極６２とが導通する。
そして、取付ねじ３５を用いて取付フランジ部２２ｆを取付部５４に取り付けることにより、図７に示すように、内燃機関用点火コイル１１をエンジン５１に取り付けることができる。 Next, the attachment of the ignition coil 11 for the internal combustion engine to the engine 51 will be briefly described.
First, the internal combustion engine ignition coil 11 shown in FIG. 6 is inserted into the plug hole 52 of the engine 51 from the boot portion 43 side, as shown in FIG.
Then, the top electrode 62 and the insulator 64 of the spark plug 61 are inserted and fitted into the boot portion 43, the umbrella portion 42 u of the rubber portion 42 is covered with the annular portion 53, and the insulating case 22 is placed on the attachment portion 54. When the mounting flange portion 22f is positioned, the lower end of the coil spring 45 comes into contact with the top electrode 62 and the coil spring 45 is slightly contracted, whereby the coil spring 45 and the top electrode 62 are electrically connected.
Then, by attaching the attachment flange portion 22f to the attachment portion 54 using the attachment screw 35, the internal combustion engine ignition coil 11 can be attached to the engine 51 as shown in FIG.

次に、内燃機関用点火コイル１１の動作について簡単に説明する。
図７に示すように、エンジン５１に取り付けられた内燃機関用点火コイル１１は、図示を省略したエンジン制御装置（ＥＣＵ）から供給される信号に基づいて点火コイル本体２１内の一次コイルに通電し、一次コイルへの通電を遮断することにより、鉄心に磁束が発生し、変化することによって二次コイルに高電圧が誘起され（発生し）、高圧端子２４に高電圧が供給される。
そして、高圧端子２４に供給された高電圧は抵抗３３およびコイルスプリング４５を介して点火プラグ６１の頂部電極６２に供給されるので、中心電極６３と電極６５ｅとの間に火花放電が発生する（例えば、特許文献１、特許文献２、特許文献３参照。）。 Next, the operation of the internal combustion engine ignition coil 11 will be briefly described.
As shown in FIG. 7, the internal combustion engine ignition coil 11 attached to the engine 51 energizes the primary coil in the ignition coil body 21 based on a signal supplied from an engine control unit (ECU) (not shown). By interrupting the energization of the primary coil, a magnetic flux is generated in the iron core, and by changing, a high voltage is induced (generated) in the secondary coil, and a high voltage is supplied to the high voltage terminal 24.
Since the high voltage supplied to the high voltage terminal 24 is supplied to the top electrode 62 of the spark plug 61 via the resistor 33 and the coil spring 45, a spark discharge is generated between the center electrode 63 and the electrode 65e ( For example, refer to Patent Document 1, Patent Document 2, and Patent Document 3.)

特開２００８−９５６３１号公報JP 2008-95631 A 特開２００８−３４６８２号公報JP 2008-34682 A 特開２００８−２５４９５号公報JP 2008-25495 A

従来の内燃機関用点火コイル１１は、高圧タワー部２２ｔと反対側の絶縁パイプ４４の端部が開放している（閉塞されていない）ので、保管時や輸送時に、大気中の湿気に晒されて抵抗３３およびコイルスプリング４５が錆び（腐食す）ることにより、高圧端子２４からの高電圧を点火プラグ６１へ伝達するのに支障をきたし、失火する恐れがある。
そこで、保管時や輸送時に大気中の湿気に晒されても錆び（腐食し）ないように、抵抗３３を大気中の湿気に対して耐腐食性を有する材料で製作したり、コイルスプリング４５を大気中の湿気に対して耐腐食性を有するステンレスで製作する必要がある。
このように、抵抗３３を大気中の湿気に対して耐腐食性を有する材料で製作したり、コイルスプリング４５を大気中の湿気に対して耐腐食性を有するステンレスで製作すると、抵抗３３またはコイルスプリング４５の部品単価が上昇し、内燃機関用点火コイル１１が高価になる。 Since the end of the insulating pipe 44 opposite to the high pressure tower portion 22t is open (not closed), the conventional internal combustion engine ignition coil 11 is exposed to atmospheric moisture during storage and transportation. As a result, the resistor 33 and the coil spring 45 are rusted (corroded), which may hinder the transmission of the high voltage from the high voltage terminal 24 to the spark plug 61 and may cause a misfire.
Therefore, in order to prevent rusting (corrosion) even when exposed to atmospheric moisture during storage or transportation, the resistor 33 is made of a material that is resistant to atmospheric moisture, or the coil spring 45 is formed. It must be made of stainless steel that is corrosion resistant to atmospheric moisture.
As described above, when the resistor 33 is made of a material having corrosion resistance against atmospheric moisture, or the coil spring 45 is made of stainless steel having corrosion resistance against atmospheric moisture, the resistor 33 or the coil is formed. The unit price of the spring 45 increases, and the ignition coil 11 for the internal combustion engine becomes expensive.

この発明は、上記したような不都合を解消するためになされたもので、保管時や輸送時にスプリングや電気部品を大気中の湿気に晒さないようにすることにより、スプリングや電気部品を通常の安価な材料で製作することができ、高電圧をスプリングや電気部品を介して点火プラグへ伝達するのに支障をきたす恐れがなくなるとともに、寿命を長くすることのできる内燃機関用点火コイルを提供するものである。 The present invention has been made to solve the above-mentioned disadvantages. By preventing the springs and electrical parts from being exposed to moisture in the atmosphere during storage and transportation, the springs and electrical parts can be made inexpensive at a normal price. To provide an ignition coil for an internal combustion engine that can be manufactured from a variety of materials, can eliminate the risk of hindering the transmission of high voltage to a spark plug via a spring or electrical component, and can extend the service life It is.

この発明は、以下のような内容である。
（１）絶縁ケースの高圧タワー部にプロテクタが取り付けられ、前記絶縁ケース内に収容した二次コイルに発生する高電圧を、前記プロテクタの絶縁パイプ内に収容され、一端が前記高圧タワー部内の二次端子に接続されたスプリングを介して点火プラグに供給する内燃機関用点火コイルにおいて、前記スプリングの他端に対応する前記絶縁パイプの内側に、前記高圧タワー部と対向して周回する係止段部を設け、前記スプリングの他端に、前記係止段部に接して前記係止段部の内側に位置する開口を閉塞する閉塞体を設け、この閉塞体が導電性を有するとともに大気中の湿気に対して耐腐食性を有することを特徴とする。
（２）絶縁ケースの高圧タワー部にプロテクタが取り付けられ、前記絶縁ケース内に収容した二次コイルに発生する高電圧を、前記プロテクタの絶縁パイプ内に収容され、一端が前記高圧タワー部内の電気部品に接続されたスプリングを介して点火プラグに供給する内燃機関用点火コイルにおいて、前記スプリングの他端に対応する前記絶縁パイプの内側に、前記高圧タワー部と対向して周回する係止段部を設け、前記スプリングの他端に、前記係止段部に接して前記係止段部の内側に位置する開口を閉塞する閉塞体を設け、この閉塞体が導電性を有するとともに大気中の湿気に対して耐腐食性を有することを特徴とする。
（３）絶縁ケースの高圧タワー部にプロテクタが取り付けられ、前記絶縁ケース内に収容した二次コイルに発生する高電圧を、前記プロテクタの絶縁パイプ内に収容され、一端が前記高圧タワー部内の二次端子に接続されて中間部分に電気部品が配置されたスプリングを介して点火プラグに供給する内燃機関用点火コイルにおいて、前記スプリングの他端に対応する前記絶縁パイプの内側に、前記高圧タワー部と対向して周回する係止段部を設け、前記スプリングの他端に、前記係止段部に接して前記係止段部の内側に位置する開口を閉塞する閉塞体を設け、この閉塞体が導電性を有するとともに大気中の湿気に対して耐腐食性を有することを特徴とする。
（４）（１）から（３）のいずれか１つに記載の内燃機関用点火コイルにおいて、前記閉塞体をステンレスで形成したことを特徴とする。
（５）（４）に記載の内燃機関用点火コイルにおいて、前記閉塞体をステンレス板で形成したことを特徴とする。
（６）（１）から（３）のいずれか１つに記載の内燃機関用点火コイルにおいて、前記閉塞体を導電性ゴムで形成したことを特徴とする。
（７）絶縁ケースの高圧タワー部にプロテクタが取り付けられ、前記絶縁ケース内に収容した二次コイルに発生する高電圧を、前記プロテクタの絶縁パイプ内に収容され、一端が前記高圧タワー部内の電気部品に接続されたスプリングを介して点火プラグに供給する内燃機関用点火コイルにおいて、前記スプリングの他端と前記電気部品との間に対応する前記絶縁パイプの内側に、前記高圧タワー部と対向して周回する係止段部を設け、前記スプリングの他端と前記電気部品との間に対応する前記スプリングの部分に、前記係止段部に接して前記係止段部の内側に位置する開口を閉塞する閉塞体を設け、前記スプリングの少なくとも前記閉塞体から突出する他端側を、大気中の湿気に対して耐腐食性を有した導電性の金属で形成したことを特徴とする。
（８）絶縁ケースの高圧タワー部にプロテクタが取り付けられ、前記絶縁ケース内に収容した二次コイルに発生する高電圧を、前記プロテクタの絶縁パイプ内に収容され、一端が前記高圧タワー部内の二次端子に接続されて中間部分に電気部品が配置されたスプリングを介して点火プラグに供給する内燃機関用点火コイルにおいて、前記スプリングの他端と前記電気部品との間に対応する前記絶縁パイプの内側に、前記高圧タワー部と対向して周回する係止段部を設け、前記スプリングの他端と前記電気部品との間に対応する前記スプリングの部分に、前記係止段部に接して前記係止段部の内側に位置する開口を閉塞する閉塞体を設け、前記スプリングの少なくとも前記閉塞体から突出する他端側を、大気中の湿気に対して耐腐食性を有した導電性の金属で形成したことを特徴とする。
（９）（７）または（８）に記載の内燃機関用点火コイルにおいて、前記スプリングの少なくとも前記閉塞体から突出する他端側を、ステンレスで形成したことを特徴とする。
（１０）（７）から（９）のいずれか１つに記載の内燃機関用点火コイルにおいて、前記閉塞体を板で形成したことを特徴とする。
（１１）（７）から（９）のいずれか１つに記載の内燃機関用点火コイルにおいて、前記閉塞体をゴムで形成したことを特徴とする。
（１２）（１）から（４）、（６）から（９）、（１１）のいずれか１つに記載の内燃機関用点火コイルにおいて、前記閉塞体を球体にしたことを特徴とする。 The present invention has the following contents.
(1) A protector is attached to the high-voltage tower portion of the insulating case, and a high voltage generated in the secondary coil housed in the insulating case is housed in the insulating pipe of the protector, and one end is In an ignition coil for an internal combustion engine that is supplied to an ignition plug via a spring connected to a next terminal, a locking stage that circulates opposite to the high-pressure tower portion inside the insulating pipe corresponding to the other end of the spring A closing body is provided at the other end of the spring and closes the opening located inside the locking step portion in contact with the locking step portion. The closing body has conductivity and is in the atmosphere. It is characterized by having corrosion resistance against moisture.
(2) A protector is attached to the high voltage tower portion of the insulation case, and a high voltage generated in the secondary coil accommodated in the insulation case is accommodated in the insulation pipe of the protector, and one end of the In an internal combustion engine ignition coil that is supplied to an ignition plug via a spring connected to a component, an engaging step portion that circulates opposite the high-pressure tower portion inside the insulating pipe corresponding to the other end of the spring The other end of the spring is provided with a closing body that is in contact with the locking step portion and closes an opening located inside the locking step portion, and the closing body has conductivity and moisture in the atmosphere. It is characterized by having resistance to corrosion.
(3) A protector is attached to the high voltage tower portion of the insulating case, and a high voltage generated in the secondary coil accommodated in the insulating case is accommodated in the insulating pipe of the protector, and one end of the high voltage tower portion in the high voltage tower portion is accommodated. In an internal combustion engine ignition coil that is supplied to an ignition plug via a spring that is connected to the next terminal and in which an electrical component is disposed in an intermediate portion, the high-pressure tower portion is disposed inside the insulating pipe corresponding to the other end of the spring. A locking step portion that circulates in opposition to the spring, and a closing body that closes an opening located inside the locking step portion in contact with the locking step portion is provided at the other end of the spring. Is characterized by having electrical conductivity and resistance to moisture in the atmosphere.
(4) The ignition coil for an internal combustion engine according to any one of (1) to (3), wherein the closing body is made of stainless steel.
(5) In the internal combustion engine ignition coil described in (4), the closing body is formed of a stainless steel plate.
(6) The ignition coil for an internal combustion engine according to any one of (1) to (3), wherein the closing body is made of conductive rubber.
(7) A protector is attached to the high voltage tower portion of the insulation case, and a high voltage generated in the secondary coil accommodated in the insulation case is accommodated in the insulation pipe of the protector, and one end of the In an internal combustion engine ignition coil that is supplied to an ignition plug via a spring connected to a component, the high pressure tower portion is opposed to the inner side of the insulating pipe corresponding to the other end of the spring and the electrical component. And an opening located on the inside of the locking step portion in contact with the locking step portion at a corresponding portion of the spring between the other end of the spring and the electrical component. And at least the other end of the spring projecting from the closure is made of a conductive metal having corrosion resistance against atmospheric moisture. To.
(8) A protector is attached to the high voltage tower portion of the insulating case, and a high voltage generated in the secondary coil accommodated in the insulating case is accommodated in the insulating pipe of the protector, and one end of the high voltage tower portion is provided in the high voltage tower portion. In an ignition coil for an internal combustion engine that is supplied to an ignition plug via a spring that is connected to a next terminal and has an electrical part disposed in an intermediate portion, the insulating pipe corresponding to the gap between the other end of the spring and the electrical part On the inside, a locking step portion that circulates in opposition to the high-voltage tower portion is provided, and the portion of the spring that corresponds between the other end of the spring and the electrical component is in contact with the locking step portion, and A closing body that closes the opening located inside the locking step portion is provided, and at least the other end side of the spring protruding from the closing body has corrosion resistance against moisture in the atmosphere. Characterized by being formed by conductive metal.
(9) In the ignition coil for an internal combustion engine according to (7) or (8), at least the other end side of the spring protruding from the closing body is formed of stainless steel.
(10) The ignition coil for an internal combustion engine according to any one of (7) to (9), wherein the closing body is formed of a plate.
(11) The ignition coil for an internal combustion engine according to any one of (7) to (9), wherein the closing body is made of rubber.
(12) In the ignition coil for an internal combustion engine according to any one of (1) to (4), (6) to (9), and (11), the closing body is a sphere.

この発明によれば、スプリングの他端に対応する絶縁パイプの内側に、高圧タワー部と対向して周回する係止段部を設け、スプリングの他端に、係止段部に接して係止段部の内側に位置する開口を閉塞する閉塞体を設け、この閉塞体を導電性を有するとともに大気中の湿気に対して耐腐食性を有するステンレスで形成したので、スプリング、または、スプリングおよび電気部品が収容される空間が閉塞体で閉塞（密閉）される。
したがって、保管時や輸送時にスプリング、または、スプリングおよび電気部品が大気中の湿気に晒されなくなることにより、スプリング、または、スプリングおよび電気部品が錆び（腐食し）にくくなるため、スプリング、または、スプリングおよび電気部品を通常の安価な材料で製作することができ、内燃機関用点火コイルを安価に製作することができる。
また、保管時や輸送時にスプリング、または、スプリングおよび電気部品が大気中の湿気に晒されなくなることにより、スプリング、または、スプリングおよび電気部品が錆び（腐食し）にくくなるため、高電圧をスプリングや電気部品を介して点火プラグへ伝達するのに支障をきたす恐れがなくなるとともに、内燃機関用点火コイルの寿命を長くすることができる。
そして、閉塞体をステンレス板で形成したので、閉塞体を安価に、容易に製作することができるとともに、閉塞体の組み付け方向性をなくして閉塞体の組み付け作業を容易にすることができる。
また、閉塞体を導電性ゴムで形成したので、スプリング、または、スプリングおよび電気部品が収容される空間を閉塞体で確実に閉塞（密閉）することができる。
この発明によれば、スプリングの他端と電気部品との間に対応する絶縁パイプの内側に、高圧タワー部と対向して周回する係止段部を設け、スプリングの他端と電気部品との間に対応するスプリングの部分に、係止段部に接して係止段部の内側に位置する開口を閉塞する閉塞体を設け、スプリングの少なくとも閉塞体から突出する他端側を、大気中の湿気に対して耐腐食性を有した導電性のステンレスで形成したので、電気部品およびスプリングの一端側部分が収容される空間が閉塞体で閉塞（密閉）される。
したがって、保管時や輸送時に電気部品およびスプリングの一端側部分が大気中の湿気に晒されなくなることにより、電気部品およびスプリング一部分が錆び（腐食し）にくくなるため、電気部品およびスプリングの一端側部分を通常の安価な材料で製作することができ、内燃機関用点火コイルを安価に製作することができる。
また、保管時や輸送時に電気部品およびスプリングの一端側部分が大気中の湿気に晒されなくなることにより、電気部品およびスプリング一部分が錆び（腐食し）にくくなるため、高電圧を電気部品およびスプリングを介して点火プラグへ伝達するのに支障をきたす恐れがなくなるとともに、内燃機関用点火コイルの寿命を長くすることができる。
そして、閉塞体を板で形成したので、閉塞体を安価に、容易に製作することができるとともに、閉塞体の組み付け方向性をなくして閉塞体の組み付け作業を容易にすることができる。
また、閉塞体をゴムで形成したので、電気部品およびスプリングの一端側部分が収容される空間を閉塞体で確実に閉塞（密閉）することができる。
さらに、閉塞体を球体にしたので、閉塞体の組み付け方向性をなくして閉塞体の組み付け作業を容易にすることができる。 According to the present invention, the locking step portion that circulates facing the high-pressure tower portion is provided inside the insulating pipe corresponding to the other end of the spring, and the other end of the spring is locked in contact with the locking step portion. Since a closing body that closes the opening located inside the step portion is provided, and the closing body is made of stainless steel that has conductivity and is resistant to moisture in the atmosphere, the spring or the spring and the electric The space in which the parts are accommodated is closed (sealed) with the closing body.
Therefore, the spring or the spring and electrical parts are not exposed to moisture in the atmosphere during storage and transportation, so that the spring or the spring and electrical parts are not easily rusted (corroded). In addition, the electric parts can be manufactured with a normal inexpensive material, and the ignition coil for the internal combustion engine can be manufactured at a low cost.
In addition, the spring or the spring and electrical components are not exposed to atmospheric moisture during storage or transportation, and the spring or spring and electrical components are less likely to rust (corrode). This eliminates the possibility of hindering transmission to the spark plug via the electrical component, and extends the life of the ignition coil for the internal combustion engine.
Since the closing body is formed of a stainless steel plate, the closing body can be easily manufactured at low cost, and the assembling work of the closing body can be facilitated by eliminating the assembling direction of the closing body.
In addition, since the closing body is made of conductive rubber, the spring or the space in which the spring and the electrical component are accommodated can be reliably closed (sealed) with the closing body.
According to the present invention, the locking step portion that circulates in opposition to the high-pressure tower portion is provided inside the corresponding insulating pipe between the other end of the spring and the electrical component, and the other end of the spring and the electrical component are Provided in the part of the spring corresponding to the middle is a closing body that contacts the locking step and closes the opening located inside the locking step, and at least the other end of the spring protruding from the closing body is Since it is made of conductive stainless steel having corrosion resistance to moisture, the space in which the electric component and the one end side portion of the spring are accommodated is closed (sealed) with a closing body.
Therefore, one end part of the electrical component and the spring is not easily rusted (corroded) because the electrical component and the one end part of the spring are not exposed to atmospheric moisture during storage or transportation. Can be manufactured with an ordinary inexpensive material, and an ignition coil for an internal combustion engine can be manufactured at a low cost.
In addition, the electrical components and the one end of the spring are not exposed to moisture in the atmosphere during storage and transportation, so that the electrical components and the spring part are not easily rusted (corroded). Thus, there is no possibility of causing troubles in transmission to the spark plug through and the life of the ignition coil for the internal combustion engine can be extended.
And since the closure body was formed with the board, while being able to manufacture a closure body cheaply and easily, the assembly | attachment operation | work of a closure body can be made easy by eliminating the assembly direction of a closure body.
Further, since the closing body is formed of rubber, the space in which the electric component and the one end side portion of the spring are accommodated can be reliably closed (sealed) with the closing body.
Furthermore, since the closure body is a sphere, the assembly direction of the closure body can be eliminated and the assembly work of the closure body can be facilitated.

以下、この発明の実施例を図に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図１はこの発明の第１実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図、図２は図１に示した内燃機関用点火コイルをエンジンに取り付けた状態を示す一部を破断した正面図であり、図６または図７に示した部分と同一部分、または、図６または図７に示した部分に相当する部分に同一符号を付し、その説明を省略する。 FIG. 1 is a partially cutaway front view showing a schematic configuration of an internal combustion engine ignition coil according to a first embodiment of the present invention. FIG. 2 shows a state in which the internal combustion engine ignition coil shown in FIG. FIG. 8 is a partially cutaway front view, and the same parts as those shown in FIG. 6 or FIG. 7 or parts corresponding to the parts shown in FIG. 6 or FIG. To do.

図１に示した第１実施例の内燃機関用点火コイル１１が従来の内燃機関用点火コイル１１と異なるのは、コイルスプリング４５の他端（下端）に対応する絶縁パイプ４４の内側に、絶縁ケース２２の高圧タワー部２２ｔと対向して周回する係止段部４４ｓを設け、コイルスプリング４５の他端に、係止段部４４ｓに接して係止段部４４ｓの内側に位置する開口を閉塞する閉塞体４６を設け、この閉塞体４６を導電性を有するとともに大気中の湿気に対して耐腐食性を有するステンレスで球体（球状）形成したところである。
なお、閉塞体４６の直径は、係止段部４４ｓの内径を超える大きさとされている。 The internal combustion engine ignition coil 11 of the first embodiment shown in FIG. 1 is different from the conventional internal combustion engine ignition coil 11 in that an insulation pipe 44 corresponding to the other end (lower end) of the coil spring 45 is insulated inside. A locking step 44s that circulates facing the high-pressure tower 22t of the case 22 is provided, and an opening located inside the locking step 44s in contact with the locking step 44s is closed at the other end of the coil spring 45. The closed body 46 is provided, and the closed body 46 is formed of a spherical body (spherical) with stainless steel having conductivity and resistance to moisture in the atmosphere.
The diameter of the closing body 46 is larger than the inner diameter of the locking step 44s.

次に、内燃機関用点火コイル１１の組立について簡単に説明する。
まず、図１に示すように立てた絶縁パイプ４４内へ球状の閉塞体４６を上側から挿入することにより、閉塞体４６は係止段部４４ｓに係合し、絶縁パイプ４４から抜け落ちなくなる。
そして、絶縁パイプ４４内へコイルスプリング４５を挿入してコイルスプリング４５の下端を閉塞体４６と接触（導通）させた後、ラバー部４２に絶縁ケース２２の高圧タワー部２２ｔを嵌合させることにより、図１に示すように、コイルスプリング４５の一端（上端）を抵抗３３に接触（導通）させた状態に内燃機関用点火コイル１１を組み立てることができる。 Next, the assembly of the internal combustion engine ignition coil 11 will be briefly described.
First, by inserting a spherical closing body 46 into the insulating pipe 44 standing upright as shown in FIG. 1 from above, the closing body 46 engages with the locking step 44s and does not fall out of the insulating pipe 44.
Then, after inserting the coil spring 45 into the insulating pipe 44 and bringing the lower end of the coil spring 45 into contact (conduction) with the closing body 46, the high pressure tower portion 22t of the insulating case 22 is fitted to the rubber portion 42. As shown in FIG. 1, the internal combustion engine ignition coil 11 can be assembled in a state in which one end (upper end) of the coil spring 45 is in contact (conductive) with the resistor 33.

次に、内燃機関用点火コイル１１のエンジン５１への取付について簡単に説明する。
まず、図１に示した内燃機関用点火コイル１１を、図２に示すように、ブーツ部４３側からエンジン５１のプラグホール５２内へ挿入する。
そして、ブーツ部４３内に点火プラグ６１の頂部電極６２および絶縁碍子６４を挿入して嵌合させ、ラバー部４２の傘部４２ｕを環状部５３に被せるとともに、取付部５４の上に絶縁ケース２２の取付フランジ部２２ｆを位置させると、閉塞体４６の下端が頂部電極６２に接触してコイルスプリング４５が少し縮むことによって閉塞体４６が上昇して係止段部４４ｓから離れることにより、閉塞体４６を介してコイルスプリング４５と頂部電極６２とが導通する。
そして、取付ねじ３５を用いて取付フランジ部２２ｆを取付部５４に取り付けることにより、図２に示すように、内燃機関用点火コイル１１をエンジン５１に取り付けることができる。
なお、この第１実施例の内燃機関用点火コイル１１の動作は、従来例と同様になるので、説明を省略する。 Next, the attachment of the ignition coil 11 for the internal combustion engine to the engine 51 will be briefly described.
First, the internal combustion engine ignition coil 11 shown in FIG. 1 is inserted into the plug hole 52 of the engine 51 from the boot portion 43 side, as shown in FIG.
Then, the top electrode 62 and the insulator 64 of the spark plug 61 are inserted and fitted into the boot portion 43, the umbrella portion 42 u of the rubber portion 42 is covered with the annular portion 53, and the insulating case 22 is placed on the attachment portion 54. When the mounting flange portion 22f is positioned, the lower end of the closing body 46 comes into contact with the top electrode 62 and the coil spring 45 is slightly contracted, so that the closing body 46 rises and separates from the locking step 44s. The coil spring 45 and the top electrode 62 are conducted through 46.
Then, by attaching the attachment flange portion 22f to the attachment portion 54 using the attachment screw 35, the internal combustion engine ignition coil 11 can be attached to the engine 51 as shown in FIG.
The operation of the ignition coil 11 for the internal combustion engine of the first embodiment is the same as that of the conventional example, and the description thereof is omitted.

上述したように、この発明の第１実施例の内燃機関用点火コイル１１によれば、コイルスプリング４５の他端（下端）に対応する絶縁パイプ４４の内側に、絶縁ケース２２の高圧タワー部２２ｔと対向して周回する係止段部４４ｓを設け、コイルスプリング４４の他端に、係止段部４４ｓに接して係止段部４４ｓの内側に位置する開口を閉塞する閉塞体４６を設け、この閉塞体４６を導電性を有するとともに大気中の湿気に対して耐腐食性を有するステンレスで球体に形成したので、抵抗３３およびコイルスプリング４５が収容される空間が閉塞体４６で閉塞（密閉）される。
したがって、保管時や輸送時に抵抗３３およびコイルスプリング４５が大気中の湿気に晒されなくなることにより、抵抗３３およびコイルスプリング４５が錆び（腐食し）にくくなるため、抵抗３３およびコイルスプリング４５を通常の安価な材料で製作することができ、内燃機関用点火コイル１１を安価に製作することができる。
また、保管時や輸送時に抵抗３３およびコイルスプリング４５が大気中の湿気に晒されなくなることにより、抵抗３３およびコイルスプリング４５が錆びに（腐食し）くくなるため、高電圧を抵抗３３およびコイルスプリング４５を介して点火プラグ６１へ伝達するのに支障をきたす恐れがなくなるとともに、内燃機関用点火コイル１１の寿命を長くすることができる。
そして、閉塞体４６を球体（球状）にしたので、閉塞体４６の組み付け方向性をなくして閉塞体４６の組み付け作業を容易にすることができる。 As described above, according to the ignition coil 11 for the internal combustion engine of the first embodiment of the present invention, the high pressure tower portion 22t of the insulating case 22 is provided inside the insulating pipe 44 corresponding to the other end (lower end) of the coil spring 45. A locking step portion 44s that circulates in opposition to the coil spring 44, and a closing body 46 that contacts the locking step portion 44s and closes the opening located inside the locking step portion 44s is provided at the other end of the coil spring 44, Since the closed body 46 is formed into a spherical body with stainless steel having conductivity and corrosion resistance against atmospheric moisture, the space in which the resistor 33 and the coil spring 45 are accommodated is closed (sealed) with the closed body 46. Is done.
Accordingly, since the resistor 33 and the coil spring 45 are not exposed to moisture in the atmosphere during storage or transportation, the resistor 33 and the coil spring 45 are not easily rusted (corroded). The ignition coil 11 for the internal combustion engine can be manufactured at a low cost.
Further, since the resistor 33 and the coil spring 45 are not exposed to moisture in the atmosphere during storage and transportation, the resistor 33 and the coil spring 45 are less likely to be rusted (corroded), so that a high voltage is applied to the resistor 33 and the coil spring. There is no risk of hindering transmission to the ignition plug 61 via 45, and the life of the ignition coil 11 for the internal combustion engine can be extended.
And since the obstruction body 46 was made into the spherical body (spherical shape), the assembly | attachment work of the obstruction body 46 can be made easy by eliminating the assembly directionality of the obstruction body 46.

図３はこの発明の第２実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図であり、図１、図２、図６または図７に示した部分と同一部分、または、図１、図２、図６または図７に示した部分に相当する部分に同一符号を付し、その説明を省略する。 FIG. 3 is a partially cutaway front view showing a schematic configuration of an internal combustion engine ignition coil according to a second embodiment of the present invention, which is the same as that shown in FIG. 1, FIG. 2, FIG. 6 or FIG. Or the parts corresponding to the parts shown in FIG. 1, FIG. 2, FIG. 6 or FIG.

図３に示した第２実施例の内燃機関用点火コイル１１が図１に示した第１実施例の内燃機関用点火コイル１１と異なるのは、閉塞体４７を、湿気に対して耐腐食性を有し、導電性を有したステンレスの円板としたところである。
なお、閉塞体４７の直径は、係止段部４４ｓの内径を超える大きさとされている。 The internal combustion engine ignition coil 11 of the second embodiment shown in FIG. 3 is different from the internal combustion engine ignition coil 11 of the first embodiment shown in FIG. 1 in that the closing body 47 is resistant to moisture. This is a stainless steel disc having conductivity.
The diameter of the closing body 47 is larger than the inner diameter of the locking step 44s.

次に、内燃機関用点火コイル１１の組立について簡単に説明する。
まず、図３に示すように立てた絶縁パイプ４４内へ円板の閉塞体４７を上側から挿入することにより、閉塞体４７は係止段部４４ｓに係合し、絶縁パイプ４４から抜け落ちなくなる。
そして、絶縁パイプ４４内へコイルスプリング４５を挿入してコイルスプリング４５の下端を閉塞体４７と接触（導通）させた後、ラバー部４２に絶縁ケース２２の高圧タワー部２２ｔを嵌合させることにより、図３に示すように、コイルスプリング４５の一端（上端）を抵抗３３に接触（導通）させた状態に内燃機関用点火コイル１１を組み立てることができる。 Next, the assembly of the internal combustion engine ignition coil 11 will be briefly described.
First, by inserting a disc-shaped closing body 47 into the insulating pipe 44 upright as shown in FIG. 3 from above, the closing body 47 engages with the locking step 44s and does not fall out of the insulating pipe 44.
Then, after inserting the coil spring 45 into the insulating pipe 44 and bringing the lower end of the coil spring 45 into contact (conduction) with the closing body 47, the high pressure tower portion 22t of the insulating case 22 is fitted to the rubber portion 42. As shown in FIG. 3, the internal combustion engine ignition coil 11 can be assembled in a state in which one end (upper end) of the coil spring 45 is in contact (conducted) with the resistor 33.

次に、内燃機関用点火コイル１１のエンジン５１への取付について簡単に説明する。
まず、図３に示した内燃機関用点火コイル１１を、図２に示すように、ブーツ部４３側からエンジン５１のプラグホール５２内へ挿入する。
そして、ブーツ部４３内に点火プラグ６１の頂部電極６２および絶縁碍子６４を挿入して嵌合させ、ラバー部４２の傘部４２ｕを環状部５３に被せるとともに、取付部５４の上に絶縁ケース２２の取付フランジ部２２ｆを位置させると、閉塞体４７の下面が頂部電極６２に接触してコイルスプリング４５が少し縮むことによって閉塞体４７が上昇して係止段部４４ｓから離れることにより、閉塞体４７を介してコイルスプリング４５と頂部電極６２とが導通する。
そして、取付ねじ３５を用いて取付フランジ部２２ｆを取付部５４に取り付けることにより、図２に示すように、内燃機関用点火コイル１１をエンジン５１に取り付けることができる。
なお、この第２実施例の内燃機関用点火コイル１１の動作は、従来例と同様になるので、説明を省略する。 Next, the attachment of the ignition coil 11 for the internal combustion engine to the engine 51 will be briefly described.
First, the internal combustion engine ignition coil 11 shown in FIG. 3 is inserted into the plug hole 52 of the engine 51 from the boot portion 43 side, as shown in FIG.
Then, the top electrode 62 and the insulator 64 of the spark plug 61 are inserted and fitted into the boot portion 43, the umbrella portion 42 u of the rubber portion 42 is covered with the annular portion 53, and the insulating case 22 is placed on the attachment portion 54. When the mounting flange portion 22f is positioned, the lower surface of the closing body 47 comes into contact with the top electrode 62 and the coil spring 45 is slightly contracted, so that the closing body 47 rises and separates from the locking step 44s. The coil spring 45 and the top electrode 62 are conducted through 47.
Then, by attaching the attachment flange portion 22f to the attachment portion 54 using the attachment screw 35, the internal combustion engine ignition coil 11 can be attached to the engine 51 as shown in FIG.
The operation of the ignition coil 11 for the internal combustion engine of the second embodiment is the same as that of the conventional example, and the description thereof is omitted.

この第２実施例の内燃機関用点火コイル１１においても、第１実施例の内燃機関用点火コイル１１と同様な効果を得ることができる。
そして、閉塞体４７を、導電性を有するとともに大気中の湿気に対して耐腐食性を有するステンレスの円板としたので、閉塞体４７を安価に、容易に製作することができるとともに、閉塞体４７の組み付け方向性をなくして閉塞体４７の組み付け作業を容易にすることができる。 In the internal combustion engine ignition coil 11 of the second embodiment, the same effect as that of the internal combustion engine ignition coil 11 of the first embodiment can be obtained.
And since the obstruction body 47 is made of a stainless steel disc having conductivity and resistance to moisture in the atmosphere, the obstruction body 47 can be easily manufactured at a low cost. The assembly direction of 47 can be eliminated, and the assembly work of the closing body 47 can be facilitated.

図４はこの発明の第３実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図であり、図１〜図３、図６または図７に示した部分と同一部分、または、図１〜図３、図６または図７に示した部分に相当する部分に同一符号を付し、その説明を省略する。 FIG. 4 is a partially cutaway front view showing a schematic configuration of an internal combustion engine ignition coil according to a third embodiment of the present invention, which is the same as that shown in FIG. 1 to FIG. 3, FIG. 6 or FIG. Or the parts corresponding to the parts shown in FIG. 1 to FIG. 3, FIG. 6 or FIG.

図４に示した第３実施例の内燃機関用点火コイル１１が従来の内燃機関用点火コイル１１と異なるのは、コイルスプリング４５の他端（下端）と抵抗３３との間に対応する絶縁パイプ４４の内側に、絶縁ケース２２の高圧タワー部２２ｔと対向して周回する係止段部４４ｓを設け、コイルスプリング４５の他端と抵抗３３との間に対応するコイルスプリング４５の部分に、係止段部４４ｓに接して係止段部４４ｓの内側に位置する開口を閉塞する閉塞体４６Ａを球体（球状）に形成して設け、コイルスプリング４５を大気中の湿気に対して耐腐食性を有した導電性のステンレスで形成したところである。
なお、閉塞体４６Ａの直径は、係止段部４４ｓの内径を超える大きさとされている。
そして、閉塞体４６Ａは、コイルスプリング４５に固着（固定）されている。 The internal combustion engine ignition coil 11 of the third embodiment shown in FIG. 4 is different from the conventional internal combustion engine ignition coil 11 in that an insulating pipe corresponding to the gap between the other end (lower end) of the coil spring 45 and the resistor 33 is used. A locking step portion 44 s that circulates opposite to the high-voltage tower portion 22 t of the insulating case 22 is provided inside 44, and a portion of the coil spring 45 that corresponds between the other end of the coil spring 45 and the resistor 33 is engaged. A closed body 46A that is in contact with the stop step 44s and closes the opening located inside the locking step 44s is formed in a spherical shape, and the coil spring 45 is resistant to corrosion in the atmosphere. It has just been formed with the conductive stainless steel.
The diameter of the closing body 46A is larger than the inner diameter of the locking step 44s.
The closing body 46A is fixed (fixed) to the coil spring 45.

次に、内燃機関用点火コイル１１の組立について簡単に説明する。
まず、図４に示すように立てた絶縁パイプ４４内へ球状の閉塞体４６Ａを取り付けたコイルスプリング４５を上側から挿入することにより、閉塞体４６Ａは係止段部４４ｓに係合し、コイルスプリング４５および閉塞体４６Ａは絶縁パイプ４４から抜け落ちなくなる。
そして、ラバー部４２に絶縁ケース２２の高圧タワー部２２ｔを嵌合させることにより、図４に示すように、コイルスプリング４５の一端（上端）を抵抗３３に接触（導通）させた状態に内燃機関用点火コイル１１を組み立てることができる。 Next, the assembly of the internal combustion engine ignition coil 11 will be briefly described.
First, as shown in FIG. 4, a coil spring 45 having a spherical closing body 46A attached to an insulating pipe 44 standing upright is inserted from above, so that the closing body 46A engages with the locking step 44s. 45 and the closing body 46A do not fall out of the insulating pipe 44.
Then, by fitting the high-pressure tower portion 22t of the insulating case 22 to the rubber portion 42, the internal combustion engine is brought into a state in which one end (upper end) of the coil spring 45 is in contact (conductive) with the resistor 33 as shown in FIG. The ignition coil 11 can be assembled.

次に、内燃機関用点火コイル１１のエンジン５１への取付について簡単に説明する。
まず、図４に示した内燃機関用点火コイル１１を、図２に示すように、ブーツ部４３側からエンジン５１のプラグホール５２内へ挿入する。
そして、ブーツ部４３内に点火プラグ６１の頂部電極６２および絶縁碍子６４を挿入して嵌合させ、ラバー部４２の傘部４２ｕを環状部５３に被せるとともに、取付部５４の上に絶縁ケース２２の取付フランジ部２２ｆを位置させると、コイルスプリング４５の下端が頂部電極６２に接触してコイルスプリング４５が少し縮むことによって閉塞体４６Ａが上昇して係止段部４４ｓから離れることにより、コイルスプリング４５と頂部電極６２とが導通する。
そして、取付ねじ３５を用いて取付フランジ部２２ｆを取付部５４に取り付けることにより、図２に示すように、内燃機関用点火コイル１１をエンジン５１に取り付けることができる。
なお、この第３実施例の内燃機関用点火コイル１１の動作は、従来例と同様になるので、説明を省略する。 Next, the attachment of the ignition coil 11 for the internal combustion engine to the engine 51 will be briefly described.
First, the internal combustion engine ignition coil 11 shown in FIG. 4 is inserted into the plug hole 52 of the engine 51 from the boot portion 43 side, as shown in FIG.
Then, the top electrode 62 and the insulator 64 of the spark plug 61 are inserted and fitted into the boot portion 43, the umbrella portion 42 u of the rubber portion 42 is covered with the annular portion 53, and the insulating case 22 is placed on the attachment portion 54. When the mounting flange portion 22f of the coil spring 45 is positioned, the lower end of the coil spring 45 comes into contact with the top electrode 62 and the coil spring 45 is slightly contracted, whereby the closing body 46A is lifted and separated from the locking step portion 44s. 45 and the top electrode 62 are electrically connected.
Then, by attaching the attachment flange portion 22f to the attachment portion 54 using the attachment screw 35, the internal combustion engine ignition coil 11 can be attached to the engine 51 as shown in FIG.
The operation of the ignition coil 11 for the internal combustion engine of the third embodiment is the same as that of the conventional example, and the description thereof is omitted.

上述したように、この発明の第３実施例の内燃機関用点火コイル１１によれば、コイルスプリング４５の他端（下端）と抵抗３３との間に対応する絶縁パイプ４４の内側に、絶縁ケース２２の高圧タワー部２２ｔと対向して周回する係止段部４４ｓを設け、コイルスプリング４５の他端と抵抗３３との間に対応するコイルスプリング４５の部分に、係止段部４４ｓに接して係止段部４４ｓの内側に位置する開口を閉塞する閉塞体４６Ａを球体（球状）に形成して設け、コイルスプリング４５を大気中の湿気に対して耐腐食性を有した導電性のステンレスで形成したので、抵抗３３が収容される空間が閉塞体４６Ａで閉塞（密閉）される。
したがって、保管時や輸送時に抵抗３３が大気中の湿気に晒されなくなることにより、抵抗３３が錆び（腐食し）にくくなるため、抵抗３３を通常の安価な材料で製作することができ、内燃機関用点火コイル１１を安価に製作することができる。
また、保管時や輸送時に抵抗３３が大気中の湿気が晒されなくなることにより、抵抗３３が錆び（腐食し）にくくなり、コイルスプリング４５をステンレスで形成したため、高電圧を抵抗３３およびコイルスプリング４５を介して点火プラグ６１へ伝達するのに支障をきたす恐れがなくなるとともに、内燃機関用点火コイル１１の寿命を長くすることができる。
そして、閉塞体４６Ａを球体（球状）にしたので、閉塞体４６Ａの組み付け方向性をなくして閉塞体４６Ａの組み付け作業を容易にすることができる。 As described above, according to the ignition coil 11 for the internal combustion engine of the third embodiment of the present invention, the insulating case is provided inside the insulating pipe 44 corresponding to the gap between the other end (lower end) of the coil spring 45 and the resistor 33. An engaging step 44s that circulates in opposition to the high-pressure tower 22t of 22 is provided, and a portion of the coil spring 45 that is between the other end of the coil spring 45 and the resistor 33 is in contact with the engaging step 44s. A closing body 46A that closes the opening located inside the locking step 44s is formed in a spherical shape (spherical), and the coil spring 45 is made of conductive stainless steel that is resistant to moisture in the atmosphere. Since it is formed, the space in which the resistor 33 is accommodated is closed (sealed) with the closing body 46A.
Accordingly, since the resistor 33 is not exposed to atmospheric moisture during storage or transportation, the resistor 33 is less likely to be rusted (corroded). Therefore, the resistor 33 can be manufactured from a normal inexpensive material. The ignition coil 11 can be manufactured at a low cost.
Further, since the resistor 33 is not exposed to atmospheric moisture during storage or transportation, the resistor 33 is less likely to be rusted (corroded), and the coil spring 45 is made of stainless steel. Therefore, a high voltage is applied to the resistor 33 and the coil spring 45. In this way, there is no risk of hindering transmission to the ignition plug 61 via the internal combustion engine, and the life of the internal combustion engine ignition coil 11 can be extended.
And since the obstruction body 46A was made into the spherical body (spherical shape), the assembly | attachment work of the obstruction body 46A can be made easy by eliminating the assembly directionality of the obstruction body 46A.

図５はこの発明の第４実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図であり、図１〜図４、図６または図７に示した部分と同一部分、または、図１〜図４、図６または図７に示した部分に相当する部分に同一符号を付し、その説明を省略する。 FIG. 5 is a partially cutaway front view showing a schematic configuration of an internal combustion engine ignition coil according to a fourth embodiment of the present invention, which is the same as that shown in FIG. 1 to FIG. 4, FIG. 6 or FIG. Or the part equivalent to the part shown in FIGS. 1-4, FIG. 6, or FIG. 7 is attached | subjected, and the description is abbreviate | omitted.

図５に示した第４実施例の内燃機関用点火コイル１１が図４に示した第３実施例の内燃機関用点火コイル１１と異なるのは、閉塞体４７Ａを円板にしたところである。
なお、閉塞体４７Ａの直径は、係止段部４４ｓの内径を超える大きさとされている。 The ignition coil 11 for the internal combustion engine of the fourth embodiment shown in FIG. 5 is different from the ignition coil 11 for the internal combustion engine of the third embodiment shown in FIG. 4 in that the closing body 47A is a disk.
The diameter of the closing body 47A is larger than the inner diameter of the locking step 44s.

次に、内燃機関用点火コイル１１の組立について簡単に説明する。
まず、図５に示すように立てた絶縁パイプ４４内へ球状の閉塞体４７Ａを取り付けたコイルスプリング４５を上側から挿入することにより、閉塞体４７Ａは係止段部４４ｓに係合し、コイルスプリング４５および閉塞体４７Ａは絶縁パイプ４４から抜け落ちなくなる。
そして、ラバー部４２に絶縁ケース２２の高圧タワー部２２ｔを嵌合させることにより、図５に示すように、コイルスプリング４５の一端（上端）を抵抗３３に接触（導通）させた状態に内燃機関用点火コイル１１を組み立てることができる。 Next, the assembly of the internal combustion engine ignition coil 11 will be briefly described.
First, as shown in FIG. 5, a coil spring 45 having a spherical closing body 47A attached to an insulating pipe 44 standing upright is inserted from above, so that the closing body 47A engages with the locking step 44s, and the coil spring. 45 and the closing body 47A do not fall out of the insulating pipe 44.
Then, by fitting the high-pressure tower portion 22t of the insulating case 22 to the rubber portion 42, the internal combustion engine is brought into a state in which one end (upper end) of the coil spring 45 is in contact (conductive) with the resistor 33 as shown in FIG. The ignition coil 11 can be assembled.

次に、内燃機関用点火コイル１１のエンジン５１への取付について簡単に説明する。
まず、図５に示した内燃機関用点火コイル１１を、図２に示すように、ブーツ部４３側からエンジン５１のプラグホール５２内へ挿入する。
そして、ブーツ部４３内に点火プラグ６１の頂部電極６２および絶縁碍子６４を挿入して嵌合させ、ラバー部４２の傘部４２ｕを環状部５３に被せるとともに、取付部５４の上に絶縁ケース２２の取付フランジ部２２ｆを位置させると、コイルスプリング４５の下端が頂部電極６２に接触してコイルスプリング４５が少し縮むことによって閉塞体４７Ａが上昇して係止段部４４ｓから離れることにより、コイルスプリング４５と頂部電極６２とが導通する。
そして、取付ねじ３５を用いて取付フランジ部２２ｆを取付部５４に取り付けることにより、図２に示すように、内燃機関用点火コイル１１をエンジン５１に取り付けることができる。
なお、この第４実施例の内燃機関用点火コイル１１の動作は、従来例と同様になるので、説明を省略する。 Next, the attachment of the ignition coil 11 for the internal combustion engine to the engine 51 will be briefly described.
First, the internal combustion engine ignition coil 11 shown in FIG. 5 is inserted into the plug hole 52 of the engine 51 from the boot portion 43 side, as shown in FIG.
Then, the top electrode 62 and the insulator 64 of the spark plug 61 are inserted and fitted into the boot portion 43, the umbrella portion 42 u of the rubber portion 42 is covered with the annular portion 53, and the insulating case 22 is placed on the attachment portion 54. When the mounting flange portion 22f of the coil spring 45 is positioned, the lower end of the coil spring 45 comes into contact with the top electrode 62 and the coil spring 45 contracts slightly, so that the closing body 47A rises and separates from the locking step portion 44s. 45 and the top electrode 62 are electrically connected.
Then, by attaching the attachment flange portion 22f to the attachment portion 54 using the attachment screw 35, the internal combustion engine ignition coil 11 can be attached to the engine 51 as shown in FIG.
The operation of the ignition coil 11 for the internal combustion engine of the fourth embodiment is the same as that of the conventional example, so that the description thereof is omitted.

この第４実施例の内燃機関用点火コイル１１においても、第３実施例の内燃機関用点火コイル１１と同様な効果を得ることができる。
そして、閉塞体４７Ａを円板としたので、閉塞体４７Ａを安価に、容易に製作することができるとともに、閉塞体４７Ａの組み付け方向性をなくして閉塞体４７Ａの組み付け作業を容易にすることができる。 In the internal combustion engine ignition coil 11 of the fourth embodiment, the same effect as that of the internal combustion engine ignition coil 11 of the third embodiment can be obtained.
Since the closure body 47A is a disk, the closure body 47A can be easily manufactured at a low cost, and the assembly direction of the closure body 47A can be eliminated and the assembly work of the closure body 47A can be facilitated. it can.

上記した第１、第２実施例において、コイルスプリング４５と閉塞体４６，４７とを別体とした例を示したが、コイルスプリングに閉塞体を固着して両者を一体にしてもよい。
このように、コイルスプリングに閉塞体を固着して両者を一体にすると、部品点数が少なくなることにより、組立作業を容易にすることができる。
また、第１、第２実施例において、閉塞体４６，４７をステンレスで形成した例を示したが、閉塞体を同様に機能するチタン、導電性ゴムなどで形成しても、同様な効果を得ることができる。
そして、閉塞体を導電性ゴムで形成すると、抵抗およびコイルスプリングが収容される空間を閉塞体で確実に閉塞（密閉）することができる。
また、第３、第４実施例において、コイルスプリング４５全体をステンレスで形成した例を示したが、コイルスプリングの少なくとも閉塞体から点火プラグ側へ突出する他端側を、大気中の湿気に対して耐腐食性を有した導電性の金属、例えば、ステンレス、チタンなどで形成しても、同様な効果を得ることができる。
また、第３、第４実施例において、閉塞体４６Ａ，４７Ａをゴムで形成してもよい。
このように、閉塞体をゴムで形成すると、抵抗およびコイルスプリングの一部（一端側）が収容される空間を閉塞体で確実に閉塞（密閉）することができる。
また、第１〜第４実施例において、高圧タワー部２２ｔ内に高圧端子２４および抵抗３３を配置した例を示したが、高圧タワー部内に抵抗のみを配置し、抵抗に高圧端子の機能を持たせてもよい。
また、第１〜第４実施例において、高圧タワー部２２ｔ内に抵抗３３を配置した例を示したが、抵抗がなくても、抵抗をコイルスプリングの中間部分に、例えば、特許文献３のように配置したものにも適用することができ、同様な効果を得ることができる。
また、第１〜第４実施例において、電気部品を抵抗３３とした例を示したが、電気部品はコイルであっても、抵抗およびコイルであっても、他の部品であってもよい。
また、第１〜第４実施例において、コイルスプリング４５が太径部４５ｂと細径部４５ｓとからなる例を示したが、コイルスプリングは一様な太さ（直径）のものであってもよい。 In the first and second embodiments described above, an example in which the coil spring 45 and the closing bodies 46 and 47 are separated from each other has been shown. However, the closing body may be fixed to the coil spring and integrated together.
As described above, when the closing body is fixed to the coil spring and integrated with each other, the number of parts is reduced, and the assembling work can be facilitated.
In the first and second embodiments, the closing bodies 46 and 47 are made of stainless steel. However, the same effect can be obtained if the closing bodies are made of titanium, conductive rubber, or the like that functions in the same manner. Obtainable.
When the closing body is formed of conductive rubber, the space in which the resistor and the coil spring are accommodated can be reliably closed (sealed) with the closing body.
In the third and fourth embodiments, the example in which the entire coil spring 45 is made of stainless steel has been shown. However, at least the other end side of the coil spring that protrudes from the closed body to the spark plug side is connected to moisture in the atmosphere. The same effect can be obtained even when formed of a conductive metal having corrosion resistance, such as stainless steel or titanium.
In the third and fourth embodiments, the closing bodies 46A and 47A may be formed of rubber.
In this way, when the closing body is formed of rubber, the space in which the resistor and a part of the coil spring (one end side) are accommodated can be reliably closed (sealed) with the closing body.
In the first to fourth embodiments, the example in which the high voltage terminal 24 and the resistor 33 are arranged in the high voltage tower portion 22t is shown. However, only the resistor is arranged in the high voltage tower portion, and the resistor has a function of a high voltage terminal. It may be allowed.
In the first to fourth embodiments, the example in which the resistor 33 is disposed in the high-voltage tower portion 22t is shown. However, even if there is no resistor, the resistor is placed in the middle portion of the coil spring, for example, as in Patent Document 3 It can be applied to those arranged in the above, and the same effect can be obtained.
Further, in the first to fourth embodiments, the example in which the electric component is the resistor 33 has been shown, but the electric component may be a coil, a resistor and a coil, or another component.
In the first to fourth embodiments, the example in which the coil spring 45 is composed of the large diameter portion 45b and the small diameter portion 45s is shown. However, the coil spring may have a uniform thickness (diameter). Good.

この発明の第１実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図である。1 is a partially cutaway front view showing a schematic configuration of an internal combustion engine ignition coil according to a first embodiment of the present invention; FIG. 図１に示した内燃機関用点火コイルをエンジンに取り付けた状態を示す一部を破断した正面図である。FIG. 2 is a partially cutaway front view showing a state in which the internal combustion engine ignition coil shown in FIG. 1 is attached to the engine. この発明の第２実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図である。It is the front view which fractured | ruptured a part which shows schematic structure of the ignition coil for internal combustion engines which is 2nd Example of this invention. この発明の第３実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図である。It is the front view which fractured | ruptured a part which shows schematic structure of the ignition coil for internal combustion engines which is 3rd Example of this invention. この発明の第４実施例である内燃機関用点火コイルの概略構成を示す一部を破断した正面図である。It is the front view which fractured | ruptured a part which shows schematic structure of the ignition coil for internal combustion engines which is 4th Example of this invention. 従来の内燃機関用点火コイルの概略構成を示す一部を破断した正面図である。It is the front view which fractured | ruptured a part which shows schematic structure of the conventional ignition coil for internal combustion engines. 図６に示した内燃機関用点火コイルをエンジンに取り付けた状態を示す一部を破断した正面図である。It is the front view which fractured | ruptured a part which shows the state which attached the ignition coil for internal combustion engines shown in FIG. 6 to the engine.

Explanation of symbols

１１内燃機関用点火コイル
２１点火コイル本体
２２絶縁ケース
２２ｆ取付フランジ部
２２ｓソケット部
２２ｔ高圧タワー部
２４高圧端子（二次端子）
３３抵抗（電気部品）
３５取付ねじ
４１プロテクタ
４２ラバー部
４２ｕ傘部
４３ブーツ部
４４絶縁パイプ
４４ｐ環状肉盛り部
４４ｓ係止段部
４５コイルスプリング（導電体）
４５ｂ太径部
４５ｓ細径部
４６閉塞体
４６Ａ閉塞体
４７閉塞体
４７Ａ閉塞体
５１エンジン
５２プラグホール
５２ｓ取付ねじ孔
５３環状部
５４取付部
６１点火プラグ
６２頂部電極
６３中心電極
６４絶縁碍子
６５金具
６５ｅ電極
６５ｓ雄ねじ部 DESCRIPTION OF SYMBOLS 11 Ignition coil for internal combustion engines 21 Ignition coil body 22 Insulating case 22f Mounting flange part 22s Socket part 22t High voltage tower part 24 High voltage terminal (secondary terminal)
33 Resistance (electric parts)
35 Mounting screw 41 Protector 42 Rubber part 42u Umbrella part 43 Boot part 44 Insulating pipe 44p Annular build-up part 44s Locking step part 45 Coil spring (conductor)
45b Large diameter portion 45s Small diameter portion 46 Closure body 46A Obstruction body 47 Obstruction body 47A Obstruction body 51 Engine 52 Plug hole 52s Mounting screw hole 53 Annular portion 54 Mounting portion 61 Spark plug 62 Top electrode 63 Center electrode 64 Insulator 65 Hardware 65e Electrode 65s Male thread

Claims

A protector is attached to the high-pressure tower of the insulation case,
The high voltage generated in the secondary coil housed in the insulation case is housed in the insulation pipe of the protector, and one end is supplied to the spark plug via a spring connected to the secondary terminal in the high voltage tower section. In an internal combustion engine ignition coil,
Provided on the inner side of the insulating pipe corresponding to the other end of the spring is a locking step portion that circulates in opposition to the high-pressure tower portion,
The other end of the spring is provided with a closing body that is in contact with the locking step and closes an opening located inside the locking step.
This occlusion body is conductive and has corrosion resistance against atmospheric moisture.
An ignition coil for an internal combustion engine.

A protector is attached to the high-pressure tower of the insulation case,
An internal combustion engine that supplies high voltage generated in a secondary coil housed in the insulating case to an ignition plug via a spring housed in an insulating pipe of the protector and having one end connected to an electrical component in the high-voltage tower section. In engine ignition coils,
Provided on the inner side of the insulating pipe corresponding to the other end of the spring is a locking step portion that circulates in opposition to the high-pressure tower portion,
The other end of the spring is provided with a closing body that is in contact with the locking step and closes an opening located inside the locking step.
This occlusion body is conductive and has corrosion resistance against atmospheric moisture.
An ignition coil for an internal combustion engine.

A protector is attached to the high-pressure tower of the insulation case,
High voltage generated in the secondary coil housed in the insulation case is housed in the insulation pipe of the protector, and one end is connected to the secondary terminal in the high-voltage tower section, and an electrical component is disposed in the middle part. In an internal combustion engine ignition coil that is supplied to a spark plug via a spring,
Provided on the inner side of the insulating pipe corresponding to the other end of the spring is a locking step portion that circulates in opposition to the high-pressure tower portion,
The other end of the spring is provided with a closing body that is in contact with the locking step and closes an opening located inside the locking step.
This occlusion body is conductive and has corrosion resistance against atmospheric moisture.
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 1 to 3,
The closure was made of stainless steel,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to claim 4,
The closure was formed of a stainless steel plate,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 1 to 3,
The closure was formed of conductive rubber.
An ignition coil for an internal combustion engine.

A protector is attached to the high-pressure tower of the insulation case,
An internal combustion engine that supplies high voltage generated in a secondary coil housed in the insulating case to an ignition plug via a spring housed in an insulating pipe of the protector and having one end connected to an electrical component in the high-voltage tower section. In engine ignition coils,
Provided on the inner side of the insulating pipe corresponding to the other end of the spring and the electrical component is a locking step portion that circulates facing the high-pressure tower portion,
A portion of the spring corresponding between the other end of the spring and the electrical component is provided with a closing body that is in contact with the locking step and closes an opening located inside the locking step.
At least the other end side of the spring protruding from the closing body is formed of a conductive metal having corrosion resistance against atmospheric moisture.
An ignition coil for an internal combustion engine.

A protector is attached to the high-pressure tower of the insulation case,
High voltage generated in the secondary coil housed in the insulation case is housed in the insulation pipe of the protector, and one end is connected to the secondary terminal in the high-voltage tower section, and an electrical component is disposed in the middle part. In an internal combustion engine ignition coil that is supplied to a spark plug via a spring,
Provided on the inner side of the insulating pipe corresponding to the other end of the spring and the electrical component is a locking step portion that circulates facing the high-pressure tower portion,
A portion of the spring corresponding between the other end of the spring and the electrical component is provided with a closing body that is in contact with the locking step and closes an opening located inside the locking step.
At least the other end side of the spring protruding from the closing body is formed of a conductive metal having corrosion resistance against atmospheric moisture.
An ignition coil for an internal combustion engine.

The internal combustion engine ignition coil according to claim 7 or 8,
The other end side of the spring protruding from at least the closing body is formed of stainless steel.
An ignition coil for an internal combustion engine.

The internal combustion engine ignition coil according to any one of claims 7 to 9,
The closure was formed of a plate,
An ignition coil for an internal combustion engine.

The internal combustion engine ignition coil according to any one of claims 7 to 9,
The closure was formed of rubber.
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 1 to 4, claim 6 to 9, and claim 11.
The occlusion body is a sphere,
An ignition coil for an internal combustion engine.