JP2007214416A

JP2007214416A - Ignition coil for internal combustion engine, and method of mounting plug socket thereto

Info

Publication number: JP2007214416A
Application number: JP2006033548A
Authority: JP
Inventors: Hiroshi Kimura; 宏木村; Takahiro Kamata; 孝博鎌田
Original assignee: Hanshin Electric Co Ltd
Current assignee: Hanshin Electric Co Ltd
Priority date: 2006-02-10
Filing date: 2006-02-10
Publication date: 2007-08-23

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ignition coil for internal combustion engine in which the structure thereof is simplified, the number of components is reduced, and a plug socket and ignition coil for internal combustion engine are manufactured at low cost. <P>SOLUTION: The ignition coil for internal combustion engine 11 comprises an ignition coil body 21 for generating a high voltage, and a plug socket 41 that is mounted to a high-pressure tower 22t of the ignition coil body 21, to transfer the high voltage supplied from the ignition coil body 21 to an ignition plug. The plug socket 41 comprises an insulting pipe 44, to which one end of the high pressure tower 22t is attached by being press-fitted therein and is adhered thereto; a boot 43 that covers an insulator, having a peak electrode of the ignition plug and is attached to the other end of the insulating pipe 44; and a high-voltage transfer body that is contained in the insulating pipe 44 for supplying the high voltage supplied from the ignition coil body 21 to the ignition plug. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、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おけるプラグソケット取付方法および内燃機関用点火コイルに関するものである。 The present invention relates to a plug socket mounting method in 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, and an ignition coil for an internal combustion engine.

図４は従来の内燃機関用点火コイルをエンジンに取り付けた状態の概略構成を示す部分断面図である。 FIG. 4 is a partial cross-sectional view showing a schematic configuration in a state where a conventional ignition coil for an internal combustion engine is attached to the engine.

図４において、内燃機関用点火コイル１１は、エンジン６１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の高圧タワー部２２ｔに取り付けられ、エンジン６１に設けられたプラグホール６２の底に取り付けられた点火プラグ７１の頂部電極７２に、点火コイル本体２１の高圧端子２４からの高電圧を伝達するプラグソケット４１とで構成されている。 In FIG. 4, the ignition coil 11 for the internal combustion engine is attached to the ignition coil body 21 attached to the engine 61 and the high-pressure tower portion 22 t of the ignition coil body 21, and attached to the bottom of the plug hole 62 provided in the engine 61. A plug socket 41 for transmitting a high voltage from the high-voltage terminal 24 of the ignition coil body 21 to the top electrode 72 of the spark plug 71 is formed.

上記した点火コイル本体２１は、例えば、ポリブチレンテレフタレート（ＰＢＴ）製またはガラスフィラー入りＰＢＴ製の絶縁ケース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に設けら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２１ｔ内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３４によってエンジン６１の取付部６３に取り付けることにより、エンジン６１のプラグホール６２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 described above is provided in, for example, an insulating case 22 made of polybutylene terephthalate (PBT) or PBT containing glass filler, and a socket portion 22 s provided integrally on a side surface portion of the insulating case 22. A plurality of low-voltage terminals (primary terminals, not shown), a high-voltage terminal (secondary terminal) 24 press-fitted into a high-voltage tower portion 21 t provided integrally with the lower end portion of the insulating case 22, and the insulating case 22 And a coil / iron core assembly (not shown) housed in the insulation case 22 and filled in the insulation case 22 to provide high-voltage insulation between the components and thermosetting as an insulating resin for fixing the components in the insulation case 22 It is composed of a functional resin.
The ignition coil body 21 has a high pressure into the plug hole 62 of the engine 61 by attaching a mounting flange portion 22f integrally provided on the side surface portion of the insulating case 22 to the mounting portion 63 of the engine 61 with a mounting screw 34. 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、閉磁路で一次コイルと二次コイルとを磁気的に結合す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 is formed by winding a winding around the outer periphery of the secondary coil bobbin and laminating it, and an iron core that magnetically couples the primary coil and the secondary coil with a closed magnetic circuit.
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 connected to a terminal pin attached to the end of the secondary coil bobbin. To the high voltage terminal 24.

上記したプラグソケット４１は、点火コイル本体２１の、エンジン６１のプラグホール６２内へ浅く突入する高圧タワー部２２ｔに被さり、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とともに、エンジン６１のプラグホール６２内への液体の浸入を防ぐ弾性体製、例えば、シリコーンゴム製のラバー部４２と、プラグホール６２の底に取り付けられた点火プラグ７１の、頂部電極を７２有する絶縁碍子７４に被さって絶縁シールする弾性体製、例えば、シリコーンゴム製のブーツ部４３と、このブーツ部４３とラバー部４２とを連結する、例えば、ＰＢＴ製またはガラスフィラー入りＰＢＴ製の絶縁パイプ部４４と、この絶縁パイプ部４４内に収容された高電圧伝達体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、絶縁パイプ部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。
また、絶縁パイプ部４４には、下端から少し上側の内側に係止段部４４ｓを形成するため、周回する肉盛り部４４ｐが設けられている。 The plug socket 41 covers the high voltage tower portion 22t of the ignition coil main body 21 that enters the plug hole 62 of the engine 61 shallowly, and insulates and seals the high voltage supplied from the ignition coil main body 21. A rubber part 42 made of an elastic material that prevents the liquid from entering the plug hole 62, for example, a rubber part 42 made of silicone rubber, and an insulator 74 having a top electrode 72 of a spark plug 71 attached to the bottom of the plug hole 62 are covered. A boot portion 43 made of an elastic material which is insulated and sealed, for example, a silicone rubber boot portion, and an insulating pipe portion 44 made of, for example, PBT or PBT containing a glass filler, which connects the boot portion 43 and the rubber portion 42; It is comprised with the high voltage transmission body 45 accommodated in the insulation pipe part 44. FIG.
And the high voltage | pressure tower part 22t and the rubber part 42, and the insulation pipe part 44, the rubber part 42, and the boot part 43 are couple | bonded by the protrusion groove | channel and the fitting groove | channel which this protrusion fits, for example. .
In addition, the insulating pipe portion 44 is provided with a built-up portion 44p that circulates in order to form a locking step portion 44s slightly inside from the lower end.

上記した高電圧伝達体４５は、絶縁ケース２２の高圧タワー部２２ｔ内の高圧端子２４に一端（上端）が接続される、例えば、コイルスプリングで構成された第１導電材４６と、この第１導電材４６の他端（下端）に取り付けて接続された第１キャップ４７と、この第１キャップ４７に一端（上端）側を保持される抵抗体４８と、この抵抗体４８の他端（下端）側を保持する第２キャップ４９と、この第２キャップ４９に一端（上端）を取り付けて接続され、他端（下端）が点火プラグ７１の頂部電極７２に接続される、例えば、コイルスプリングで構成された第２導電材５０とで構成されている。
そして、第１キャップ４７（第２キャップ４９）には、抵抗体４８の端を保持する複数の保持爪４７ｈ（保持爪４９ｈ）が設けられている。
また、第２導電材５０には、絶縁パイプ部４４の係止段部４４ｓに下端が当接し、絶縁パイプ部４４の係止段部４４ｓよりも上側の内径が外径とされた太径部５０ｂが設けられている。 One end (upper end) of the high-voltage transmission body 45 described above is connected to the high-voltage terminal 24 in the high-voltage tower portion 22t of the insulating case 22, for example, a first conductive material 46 configured by a coil spring, and the first A first cap 47 attached to and connected to the other end (lower end) of the conductive material 46, a resistor 48 held at one end (upper end) by the first cap 47, and the other end (lower end) of the resistor 48 ) Side of the second cap 49, and one end (upper end) is connected to the second cap 49 and the other end (lower end) is connected to the top electrode 72 of the spark plug 71. The second conductive material 50 is configured.
The first cap 47 (second cap 49) is provided with a plurality of holding claws 47h (holding claws 49h) that hold the ends of the resistors 48.
In addition, the second conductive material 50 has a large diameter portion whose lower end is in contact with the engaging step portion 44s of the insulating pipe portion 44 and whose inner diameter is higher than the engaging step portion 44s of the insulating pipe portion 44. 50b is provided.

上記したエンジン６１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ラグソケット４１が挿入されるプラグホール６２と、このプラグホール６２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６３とが設けられている。
そして、プラグホール６２の底には、点火プラグ７１の雄ねじ部７５ｓを螺合させて点火プラグ７１を取り付けるための取付ねじ孔６２ｓが設けられている。 The above-described engine 61 is positioned around the plug hole 62 into which the high pressure tower portion 22t of the ignition coil body 21 and the plug socket 41 attached to the high pressure tower portion 22t are inserted, An attachment portion 63 for attaching the attachment flange portion 22f of the ignition coil body 21 is provided.
At the bottom of the plug hole 62, an attachment screw hole 62s for attaching the ignition plug 71 by screwing the male screw portion 75s of the ignition plug 71 is provided.

上記した点火プラグ７１は、高電圧が供給される頂部端子７２と、この頂部端子７２から延びた中心電極７３と、この中心電極７３および頂部端子７２を絶縁シールする絶縁碍子７４と、この絶縁碍子７４の外側に設けられた金具７５とで構成されている。
そして、金具７５には、プラグホール６２の取付ねじ孔６２ｓに螺合する雄ねじ部７５ｓと、この雄ねじ部７５ｓから延び、中心電極７３と火花間隙をおいて対向する電極７５ｅとが設けられている。 The spark plug 71 includes a top terminal 72 to which a high voltage is supplied, a center electrode 73 extending from the top terminal 72, an insulator 74 for insulatingly sealing the center electrode 73 and the top terminal 72, and the insulator 74 and a metal fitting 75 provided outside 74.
The metal fitting 75 is provided with a male screw portion 75s screwed into the mounting screw hole 62s of the plug hole 62, and an electrode 75e extending from the male screw portion 75s and facing the center electrode 73 with a spark gap. .

この内燃機関用点火コイル１１はエンジン・コントロール・ユニット（ＥＣＵ）から供給される信号に基づいて点火コイル本体２１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発生し（誘起され）、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高電圧伝達体４５を介して点火プラグ７１の頂部電極７２に伝達されるので、中心電極７３と電極７５ｅとの間に火花放電が発生する（例えば、特許文献１参照。）。 The internal combustion engine ignition coil 11 energizes the primary coil of the ignition coil main body 21 based on a signal supplied from an engine control unit (ECU) and cuts off the energization of the primary coil, so that magnetic flux is generated in the iron core. By generating and changing, a high voltage is generated (induced) in the secondary coil, and the high voltage is supplied to the high voltage terminal 24.
Since the high voltage supplied to the high voltage terminal 24 is transmitted to the top electrode 72 of the spark plug 71 via the high voltage transmission body 45, a spark discharge is generated between the center electrode 73 and the electrode 75e (for example, , See Patent Document 1).

特開平８−１４４９１７号公報JP-A-8-144917

従来の内燃機関用点火コイル１１は、点火コイル本体２１にプラグソケット４１を取り付けるためにラバー部４２を利用（使用）しているので、プラグソケット４１の部品点数が多くなる。
したがって、プラグソケット４１が高価になるとともに、内燃機関用点火コイル１１の構造（構成）が複雑になる。 The conventional internal combustion engine ignition coil 11 uses (uses) the rubber portion 42 to attach the plug socket 41 to the ignition coil main body 21, so that the number of parts of the plug socket 41 increases.
Therefore, the plug socket 41 is expensive and the structure (configuration) of the internal combustion engine ignition coil 11 is complicated.

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、構造（構成）を簡単にして部品点数を少なくし、プラグソケット、ひいては、内燃機関用点火コイルを安価に製作することのできる内燃機関用点火コイルにおけるプラグソケット取付方法および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 in order to eliminate the above-mentioned disadvantages. It is possible to simplify the structure (configuration), reduce the number of parts, and manufacture a plug socket, and thus an ignition coil for an internal combustion engine at low cost. A plug socket mounting method for an internal combustion engine ignition coil and an internal combustion engine ignition coil are provided.

この発明は、以下のような発明である。
（１）絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容された高電圧伝達体とで構成されたプラグソケットの前記絶縁パイプの一端を、高電圧を発生させる点火コイル本体の高圧タワー部に取り付ける内燃機関用点火コイルにおけるプラグソケット取付方法であって、外周に接着剤を塗布した前記高圧タワー部を前記絶縁パイプ部の一端へ圧入することを特徴とする。
（２）絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容された高電圧伝達体とで構成されたプラグソケットの前記絶縁パイプの一端を、高電圧を発生させる点火コイル本体の高圧タワー部に取り付ける内燃機関用点火コイルにおけるプラグソケット取付方法であって、前記高圧タワー部を前記絶縁パイプ部の一端へ圧入した後、前記高圧タワー部と前記絶縁パイプ部の一端とを溶着することを特徴とする。
（３）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に圧入されて前記高圧タワー部に取り付けられる絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成したことを特徴とする。
（４）（３）に記載の内燃機関用点火コイルにおいて、前記高圧タワー部と前記絶縁パイプ部の一端とを接着剤で接着したことを特徴とする。
（５）（３）に記載の内燃機関用点火コイルにおいて、前記高圧タワー部と前記絶縁パイプ部の一端とを溶着したことを特徴とする。
（６）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に挿入され、接着剤によって前記高圧タワー部に取り付けられる絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成したことを特徴とする。
（７）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に挿入され、溶着によって前記高圧タワー部に取り付けられる絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成したことを特徴とする。
（８）（３）から（７）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、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を前記点火コイル本体に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（９）（３）から（７）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、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を備えた壁部を、前記高圧タワー部が設けられた絶縁ケースの前記高圧タワー部の外側に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（１０）（３）から（７）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、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を前記高圧タワー部の外周に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（１１）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に挿入される絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成し、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を前記点火コイル本体に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（１２）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に挿入される絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成し、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を備えた壁部を、前記高圧タワー部が設けられた絶縁ケースの前記高圧タワー部の外側に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（１３）高電圧を発生させる点火コイル本体と、この点火コイル本体の高圧タワー部に取り付けられ、前記点火コイル本体から供給される高電圧を点火プラグへ伝達するプラグソケットとからなる内燃機関用点火コイルにおいて、前記プラグソケットを、前記高圧タワー部が一端に挿入される絶縁パイプ部と、前記点火プラグの、頂部電極を有する絶縁碍子部分に被さり、前記絶縁パイプ部の他端に取り付けられるブーツ部と、前記絶縁パイプ部内に収容され、前記点火コイル本体から供給される高電圧を前記点火プラグへ伝達する高電圧伝達体とで構成し、前記高圧タワー部が前記絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を前記高圧タワー部の外周に設け、前記抜け止め機構を構成する係止部と係合部との他方を前記絶縁パイプ部に設けたことを特徴とする。
（１４）（９）または（１２）に記載の内燃機関用点火コイルにおいて、前記壁部は環状に形成されていることを特徴とする。 The present invention is as follows.
(1) An insulating pipe part, a boot part that covers the insulator part of the spark plug having the top electrode and is attached to the other end of the insulating pipe part, and a high-voltage transmission body accommodated in the insulating pipe part A plug socket mounting method for an ignition coil for an internal combustion engine in which one end of the insulating pipe of the configured plug socket is attached to a high voltage tower portion of an ignition coil body that generates a high voltage, wherein the high pressure is coated with an adhesive on the outer periphery. The tower portion is press-fitted into one end of the insulating pipe portion.
(2) An insulating pipe part, a boot part that covers the insulator part of the spark plug having the top electrode and is attached to the other end of the insulating pipe part, and a high-voltage transmission body housed in the insulating pipe part A plug socket mounting method in an ignition coil for an internal combustion engine, wherein one end of the insulating pipe of the configured plug socket is attached to a high pressure tower portion of an ignition coil body that generates a high voltage, wherein the high pressure tower portion is connected to the insulating pipe portion. After press-fitting into one end of the high pressure tower, the high-pressure tower portion and one end of the insulating pipe portion are welded together.
(3) Ignition for an internal combustion engine comprising an ignition coil body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and that transmits a high voltage supplied from the ignition coil body to the ignition plug In the coil, the plug socket is covered with an insulating pipe portion that is press-fitted into one end of the high-pressure tower portion and attached to the high-pressure tower portion, and an insulator portion having a top electrode of the spark plug, and the insulating pipe portion The boot portion is attached to the other end, and the high voltage transmission member is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug.
(4) The ignition coil for an internal combustion engine according to (3), wherein the high-pressure tower portion and one end of the insulating pipe portion are bonded with an adhesive.
(5) The ignition coil for an internal combustion engine according to (3), wherein the high-pressure tower portion and one end of the insulating pipe portion are welded.
(6) Ignition for an internal combustion engine comprising an ignition coil main body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil main body and that transmits a high voltage supplied from the ignition coil main body to the ignition plug In the coil, the plug socket is placed on one end of the high-voltage tower portion, and an insulating pipe portion attached to the high-pressure tower portion by an adhesive and an insulator portion having a top electrode of the spark plug, and the insulation The boot portion is attached to the other end of the pipe portion, and the high voltage transmission member is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug. .
(7) Ignition for an internal combustion engine comprising an ignition coil main body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil main body and that transmits a high voltage supplied from the ignition coil main body to the ignition plug In the coil, the plug socket is covered with an insulating pipe portion having the top electrode inserted into an insulating pipe portion attached to the high pressure tower portion by welding and the high pressure tower portion, and the insulating pipe having a top electrode. A boot portion attached to the other end of the portion, and a high voltage transmission body housed in the insulating pipe portion and transmitting a high voltage supplied from the ignition coil main body to the ignition plug.
(8) In the ignition coil for an internal combustion engine according to any one of (3) to (7), a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from being detached from the insulating pipe portion; One of the engaging portions that engage with the engaging portion is provided in the ignition coil body, and the other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion. Features.
(9) In the ignition coil for an internal combustion engine according to any one of (3) to (7), a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from being detached from the insulating pipe portion; A wall portion provided with one of the engaging portions that engage with the engaging portion is provided outside the high-pressure tower portion of the insulating case provided with the high-pressure tower portion, and constitutes the retaining mechanism. The other of the stop portion and the engaging portion is provided in the insulating pipe portion.
(10) In the internal combustion engine ignition coil according to any one of (3) to (7), a locking portion constituting a retaining mechanism that prevents the high-pressure tower portion from being detached from the insulating pipe portion; One of the engaging portions that engage with the engaging portion is provided on the outer periphery of the high-pressure tower portion, and the other of the engaging portion and the engaging portion that constitute the retaining mechanism is provided on the insulating pipe portion. It is characterized by that.
(11) Ignition for an internal combustion engine comprising an ignition coil main body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil main body and that transmits a high voltage supplied from the ignition coil main body to the ignition plug In the coil, the plug socket is covered with an insulating pipe portion into which the high-voltage tower portion is inserted at one end and an insulator portion having a top electrode of the ignition plug, and a boot portion attached to the other end of the insulating pipe portion. And a high-voltage transmission body that is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug, and prevents the high-voltage tower portion from coming out of the insulating pipe portion. One of a locking part constituting a retaining mechanism and an engaging part engaging with the locking part is provided in the ignition coil body, and the retaining machine Wherein the and the other of the engaging portion and the engaging portion constituting provided on the insulating pipe part.
(12) Ignition for an internal combustion engine comprising an ignition coil main body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil main body and that transmits a high voltage supplied from the ignition coil main body to an ignition plug In the coil, the plug socket is covered with an insulating pipe portion into which the high-voltage tower portion is inserted at one end and an insulator portion having a top electrode of the ignition plug, and a boot portion attached to the other end of the insulating pipe portion. And a high-voltage transmission body that is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug, and prevents the high-voltage tower portion from coming out of the insulating pipe portion. The high-pressure tower portion is provided with a wall portion having one of a locking portion constituting a retaining mechanism and an engaging portion engaging with the locking portion. Provided outside the high voltage tower portion of the insulating case, wherein the and the other of the engaging portion and the engaging portion forming the retaining mechanism is provided in the insulating pipe part.
(13) Ignition for an internal combustion engine comprising an ignition coil main body that generates a high voltage and a plug socket that is attached to a high-voltage tower portion of the ignition coil main body and that transmits a high voltage supplied from the ignition coil main body to the ignition plug In the coil, the plug socket is covered with an insulating pipe portion into which the high-voltage tower portion is inserted at one end and an insulator portion having a top electrode of the ignition plug, and a boot portion attached to the other end of the insulating pipe portion. And a high-voltage transmission body that is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug, and prevents the high-voltage tower portion from coming out of the insulating pipe portion. One of a locking portion constituting a retaining mechanism and an engaging portion that engages with the locking portion is provided on an outer periphery of the high-pressure tower portion, and the retaining portion And the other of the engaging portion and the engaging portion forming the mechanism, characterized in that provided in the insulating pipe part.
(14) In the internal combustion engine ignition coil according to (9) or (12), the wall portion is formed in an annular shape.

この発明の内燃機関用点火コイルにおけるプラグソケット取付方法によれば、外周に接着剤を塗布した高圧タワー部を絶縁パイプ部の一端へ圧入するので、または、高圧タワー部を絶縁パイプ部の一端へ圧入した後、高圧タワー部と絶縁パイプ部の一端とを溶着するので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケットを安価に製作することができ、ひいては、内燃機関用点火コイルを安価に製作することができる。
さらに、高圧タワー部と絶縁パイプ部との間が接着剤で満たされ、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなることにより、絶縁特性が向上し、または、
高圧タワー部と絶縁パイプ部とを周回する全長（全周）で溶着することにより、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなり、絶縁特性が向上する。
次に、この発明の内燃機関用点火コイルによれば、プラグソケットを、高圧タワー部が一端に圧入されて高圧タワー部に取り付けられる絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成したので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケットを安価に製作することができ、ひいては、内燃機関用点火コイルを安価に製作することができる。
そして、高圧タワー部と絶縁パイプ部の一端とを接着剤で接着したので、点火コイル本体とプラグソケットとを確実に結合させることができ、さらに、高圧タワー部と絶縁パイプ部との間が接着剤で満たされ、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなることにより、絶縁特性が向上する。
また、高圧タワー部と絶縁パイプ部の一端とを溶着したので、点火コイル本体とプラグソケットとを確実に結合させることができ、さらに、高圧タワー部と絶縁パイプ部とを周回する全長（全周）で溶着することにより、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなり、絶縁特性が向上する。
また、この発明の内燃機関用点火コイルによれば、プラグソケットを、高圧タワー部が一端に挿入され、接着剤によって高圧タワー部に取り付けられる絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成したので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケットを安価に製作することができ、ひいては、内燃機関用点火コイルを安価に製作することができ、さらに、点火コイル本体とプラグソケットとを接着剤によって確実に結合させることができる。
さらに、高圧タワー部と絶縁パイプ部との間が接着剤で満たされ、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなることにより、絶縁特性が向上する。
また、この発明の内燃機関用点火コイルによれば、プラグソケットを、高圧タワー部が一端に挿入され、溶着によって高圧タワー部に取り付けられる絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成したので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケットを安価に製作することができ、ひいては、内燃機関用点火コイルを安価に製作することができ、さらに、点火コイル本体とプラグソケットとを溶着によって確実に結合させることができる。
さらに、高圧タワー部と絶縁パイプ部とを周回する全長（全周）で溶着することにより、高圧タワー部と絶縁パイプ部との間を貫通する隙間がなくなり、絶縁特性が向上する。
そして、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を点火コイル本体に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、または、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を備えた壁部を、高圧タワー部が設けられた絶縁ケースの高圧タワー部の外側に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、または、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を高圧タワー部の外周に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、点火コイル本体とプラグソケットとをより一層確実に結合させることができる。
また、この発明の内燃機関用点火コイルによれば、プラグソケットを、高圧タワー部が一端に挿入される絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成し、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を点火コイル本体に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、または、プラグソケットを、高圧タワー部が一端に挿入される絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成し、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を備えた壁部を、高圧タワー部が設けられた絶縁ケースの高圧タワー部の外側に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、または、プラグソケットを、高圧タワー部が一端に挿入される絶縁パイプ部と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部の他端に取り付けられるブーツ部と、絶縁パイプ部内に収容され、点火コイル本体から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成し、高圧タワー部が絶縁パイプ部から抜けるのを阻止する抜け止め機構を構成する係止部と、この係止部に係合する係合部との一方を高圧タワー部の外周に設け、抜け止め機構を構成する係止部と係合部との他方を絶縁パイプ部に設けたので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケットを安価に製作することができ、ひいては、内燃機関用点火コイルを安価に製作することができ、さらに、点火コイル本体とプラグソケットとを抜け止め機構によって確実に結合させることができる。
そして、壁部を環状に形成したので、沿面距離を長く確保できることにより、絶縁特性が向上し、また、点火コイル本体とプラグソケットとの間から絶縁パイプ部内へ液体（水など）が浸入するのを防止することができる。 According to the plug socket mounting method in the ignition coil for an internal combustion engine of the present invention, the high-pressure tower portion having an outer periphery coated with an adhesive is press-fitted into one end of the insulating pipe portion, or the high-pressure tower portion is connected to one end of the insulating pipe portion. After the press-fitting, the high-pressure tower part and one end of the insulating pipe part are welded, so that the number of parts is reduced and the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket can be manufactured at low cost, and the ignition coil for the internal combustion engine can be manufactured at low cost.
Further, the gap between the high-pressure tower part and the insulating pipe part is filled with an adhesive, and there is no gap penetrating between the high-pressure tower part and the insulating pipe part.
By welding along the entire length (around the entire circumference) of the high-pressure tower portion and the insulating pipe portion, there is no gap penetrating between the high-pressure tower portion and the insulating pipe portion, and the insulating characteristics are improved.
Next, according to the ignition coil for an internal combustion engine of the present invention, the plug socket, the insulating pipe portion having the top electrode, and the insulating pipe portion attached to the high pressure tower portion with the high pressure tower portion being press-fitted into one end. The boot part that is attached to the other end of the insulating pipe part and the high voltage transmission body that is housed in the insulating pipe part and that transmits the high voltage supplied from the ignition coil body to the ignition plug. And the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket can be manufactured at low cost, and the ignition coil for the internal combustion engine can be manufactured at low cost.
And since the high-pressure tower part and one end of the insulating pipe part are bonded with an adhesive, the ignition coil body and the plug socket can be securely bonded, and the high-pressure tower part and the insulating pipe part are bonded together. Insulation characteristics are improved by filling with the agent and eliminating a gap penetrating between the high-pressure tower portion and the insulating pipe portion.
In addition, since the high-pressure tower portion and one end of the insulating pipe portion are welded together, the ignition coil body and the plug socket can be securely coupled, and further, the entire length (around the entire circumference) of the high-pressure tower portion and the insulating pipe portion. ) Eliminates a gap penetrating between the high-pressure tower portion and the insulating pipe portion, thereby improving the insulating characteristics.
Further, according to the ignition coil for an internal combustion engine of the present invention, the plug socket is insulated with the high-pressure tower portion inserted into one end and the insulating pipe portion attached to the high-pressure tower portion by an adhesive and the top electrode of the ignition plug. Because it is configured with a boot part that covers the insulator part and is attached to the other end of the insulating pipe part, and a high voltage transmission body that is accommodated in the insulating pipe part and transmits the high voltage supplied from the ignition coil body to the ignition plug. The number of parts is reduced and the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket can be manufactured at low cost, and the ignition coil for the internal combustion engine can be manufactured at low cost. The coil body and the plug socket can be reliably bonded to each other with an adhesive.
Further, the gap between the high-pressure tower portion and the insulating pipe portion is filled with an adhesive, and there is no gap penetrating between the high-pressure tower portion and the insulating pipe portion, so that the insulating characteristics are improved.
Further, according to the ignition coil for an internal combustion engine of the present invention, the insulator having the plug socket, the insulating pipe portion in which the high pressure tower portion is inserted into one end and attached to the high pressure tower portion by welding, and the top electrode of the ignition plug Since it is composed of a boot part that covers the part and is attached to the other end of the insulating pipe part, and a high voltage transmission body that is housed in the insulating pipe part and transmits the high voltage supplied from the ignition coil body to the ignition plug, The number of points is reduced and the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket can be manufactured at low cost, and the ignition coil for the internal combustion engine can be manufactured at low cost. The coil main body and the plug socket can be reliably coupled by welding.
Further, by welding the entire length of the high-pressure tower portion and the insulating pipe portion (entire circumference), there is no gap penetrating between the high-pressure tower portion and the insulating pipe portion, and the insulation characteristics are improved.
The ignition coil main body is provided with one of a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with the retaining portion. The other of the engaging part and the engaging part that constitutes the insulating pipe part is provided in the insulating pipe part, or the engaging part that constitutes the retaining mechanism that prevents the high-pressure tower part from coming off from the insulating pipe part, and this engaging part. A wall portion provided with one of the engaging portion that engages with the stopping portion is provided outside the high-pressure tower portion of the insulating case provided with the high-pressure tower portion, and the locking portion and the engaging portion constituting the retaining mechanism Is provided in the insulating pipe part, or a locking part that constitutes a retaining mechanism that prevents the high-pressure tower part from coming out of the insulating pipe part, and an engaging part that engages with this locking part, One of these is provided on the outer periphery of the high-pressure tower section, and the latch that constitutes the retaining mechanism And since the other of the engagement portions provided in the insulating pipe part, thereby further reliably coupling the ignition coil body and the plug socket.
Further, according to the ignition coil for an internal combustion engine of the present invention, the plug socket is covered with the insulating pipe portion into which the high-pressure tower portion is inserted at one end and the insulator portion having the top electrode of the ignition plug, It consists of a boot part attached to the other end and a high voltage transmission body that is housed in the insulation pipe part and transmits the high voltage supplied from the ignition coil body to the ignition plug, and the high voltage tower part comes out of the insulation pipe part. One of a locking portion that constitutes a retaining mechanism that prevents the retaining portion and an engaging portion that engages with the retaining portion is provided in the ignition coil body, and the locking portion and the engaging portion that constitute the retaining mechanism are provided. Since the other is provided in the insulating pipe part, or the plug socket is covered with the insulating pipe part into which the high voltage tower part is inserted at one end and the insulator part having the top electrode of the spark plug, and the other end of the insulating pipe part It consists of a boot part to be attached and a high-voltage transmission body that is housed in the insulating pipe part and transmits the high voltage supplied from the ignition coil body to the ignition plug, and prevents the high-voltage tower part from escaping from the insulating pipe part. A wall portion provided with one of a locking portion that constitutes a retaining mechanism and an engaging portion that engages with the locking portion is provided outside the high-pressure tower portion of the insulating case provided with the high-pressure tower portion, Since the other of the locking part and the engaging part constituting the retaining mechanism is provided in the insulating pipe part, or the plug socket, the insulating pipe part into which the high-pressure tower part is inserted at one end, and the top part of the spark plug A boot portion that covers an insulator portion having an electrode and is attached to the other end of the insulating pipe portion, and a high voltage transmission body that is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug. The high pressure tower portion is provided on the outer periphery of the high pressure tower portion with one of a locking portion that constitutes a retaining mechanism that prevents the high pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with this locking portion, Since the other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion, the number of parts is reduced and the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket can be manufactured at low cost, and the ignition coil for the internal combustion engine can be manufactured at low cost. The coil body and the plug socket can be reliably coupled by the retaining mechanism.
Since the wall portion is formed in an annular shape, a long creepage distance can be secured, so that the insulation characteristics are improved, and liquid (such as water) enters the insulating pipe portion from between the ignition coil body and the plug socket. Can be prevented.

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（ａ），（ｂ）はこの発明の一実施例である内燃機関用点火コイルの一部を破断した正面図であり、図４と同一または相当部分に同一符号を付し、その説明を省略する。
なお、図１（ａ）は高圧タワー部にプラグソケットを取り付ける前の状態を示し、図１（ｂ）は高圧タワー部にプラグソケットを取り付けた状態を示している。
そして、高圧端子および高電圧伝達体の図示は、省略されている。 1 (a) and 1 (b) are front views in which a part of an ignition coil for an internal combustion engine according to an embodiment of the present invention is broken, and the same or corresponding parts as in FIG. Is omitted.
FIG. 1A shows a state before the plug socket is attached to the high-pressure tower, and FIG. 1B shows a state where the plug socket is attached to the high-pressure tower.
The illustration of the high-voltage terminal and the high-voltage transmission body is omitted.

この実施例が従来例と異なる部分は、従来例のラバー部を省いた点、すなわち、絶縁ケース２２に一体的に設けられた円筒状の高圧タワー部２２ｔが一端（上端）に圧入される絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端（下端）に取り付けられるブーツ部４３と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とでプラグソケット４１を構成した点である。
この実施例の他の部分は、従来例と同様に構成されている。 This embodiment is different from the conventional example in that the rubber portion of the conventional example is omitted, that is, the cylindrical high-pressure tower portion 22t provided integrally with the insulating case 22 is press-fitted into one end (upper end). The pipe portion 44 and the insulator portion having the top electrode of the spark plug are covered with the boot portion 43 attached to the other end (lower end) of the insulating pipe portion 44, and accommodated in the insulating pipe portion 44, and the ignition coil body 21 The plug socket 41 is composed of a high voltage transmission body that transmits the high voltage supplied from the spark plug to the spark plug.
Other parts of this embodiment are configured in the same manner as the conventional example.

次に、絶縁パイプ部４４（プラグソケット４１）の高圧タワー部２２ｔへの取付について説明する。
まず、図１（ａ）に示すように、高圧タワー部２２ｔの外周全面に接着剤５６を塗布する。
そして、高圧タワー部２２ｔを絶縁パイプ部４４の一端（上端）へ圧入し、絶縁パイプ部４４を高圧タワー部２２ｔに接着剤５６で接着させることにより、図１（ｂ）に示すように、絶縁パイプ部４４を高圧タワー部２２ｔに取り付けることができる。 Next, attachment of the insulating pipe portion 44 (plug socket 41) to the high-pressure tower portion 22t will be described.
First, as shown in FIG. 1A, an adhesive 56 is applied to the entire outer periphery of the high-pressure tower portion 22t.
Then, the high-pressure tower portion 22t is press-fitted into one end (upper end) of the insulating pipe portion 44, and the insulating pipe portion 44 is bonded to the high-pressure tower portion 22t with an adhesive 56, thereby insulating as shown in FIG. The pipe part 44 can be attached to the high-pressure tower part 22t.

この実施例のように、プラグソケット４１を、高圧タワー部２２ｔが一端に圧入されて高圧タワー部２２ｔに取り付けられる絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端に取り付けられるブーツ部４３と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成したので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケット４１を安価に製作することができ、ひいては、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。
そして、高圧タワー部２２ｔと絶縁パイプ部４４の一端とを接着剤５６で接着したので、点火コイル本体２１とプラグソケット４１とを確実に結合させることができ、さらに、高圧タワー部２２ｔと絶縁パイプ部４４との間が接着剤５６で満たされ、高圧タワー部２２ｔと絶縁パイプ部４４との間を貫通する隙間がなくなることにより、絶縁特性が向上する。 As in this embodiment, the plug socket 41 is covered with an insulating pipe portion 44 attached to the high-pressure tower portion 22t by press-fitting the high-pressure tower portion 22t, and an insulating insulator portion having a top electrode of the spark plug for insulation. Since it is composed of a boot portion 43 attached to the other end of the pipe portion 44 and a high voltage transmission body that is accommodated in the insulating pipe portion 44 and transmits a high voltage supplied from the ignition coil body 21 to the ignition plug. The number of points is reduced and the structure (configuration) is simplified.
In addition, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket 41 can be manufactured at low cost, and the ignition coil 11 for the internal combustion engine can be manufactured at low cost.
And since the high voltage tower part 22t and the end of the insulating pipe part 44 were adhere | attached with the adhesive agent 56, the ignition coil main body 21 and the plug socket 41 can be combined reliably, and also the high voltage tower part 22t and the insulating pipe The space between the portions 44 is filled with the adhesive 56, and there is no gap penetrating between the high-pressure tower portion 22t and the insulating pipe portion 44, thereby improving the insulating characteristics.

図２（ａ），（ｂ）はこの発明の他の実施例である内燃機関用点火コイルの要部拡大図であり、図１または図４と同一または相当部分に同一符号を付し、その説明を省略する。
なお、図２（ａ）は高圧タワー部にプラグソケットを取り付ける前の状態を示し、図２（ｂ）は高圧タワー部にプラグソケットを取り付けた状態を示している。 2 (a) and 2 (b) are enlarged views of a main part of an ignition coil for an internal combustion engine according to another embodiment of the present invention. The same or corresponding parts as those in FIG. 1 or FIG. Description is omitted.
2A shows a state before the plug socket is attached to the high-pressure tower, and FIG. 2B shows a state where the plug socket is attached to the high-pressure tower.

この実施例が従来例と異なる部分は、従来例のラバー部を省いた点、すなわち、絶縁ケース２２に一体的に設けられた円筒状の高圧タワー部２２ｔが一端（上端）に挿入される絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端（下端）に取り付けられるブーツ部と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とでプラグソケット４１を構成した点と、高圧タワー部２２ｔが絶縁パイプ部４４から抜けるのを阻止する抜け止め機構５２を設けた点、すなわち、係止部としての係止開口２２ｗｈを備え（有し）、絶縁パイプ部４４の一端が挿入される環状壁部２２ｗを絶縁ケース２２の高圧タワー部２２ｔの外側に設け、係止開口２２ｗｈに係合する係合部４４ｈを絶縁パイプ部４４の一端に設けた点とである。
なお、係合部４４ｈは、絶縁パイプ部４４の一端部に一端から平行して設けたスリットによって形成された支持片４４ｈｓと、この支持片４４ｈｓの一端外側に設けられた爪部４４ｈｎとで構成されている。
この実施例の他の部分は、従来例と同様に構成されている。 This embodiment is different from the conventional example in that the rubber portion of the conventional example is omitted, that is, the cylindrical high voltage tower portion 22t provided integrally with the insulating case 22 is inserted into one end (upper end). A pipe part 44 and a boot part that covers the insulator part of the spark plug having the top electrode and is attached to the other end (lower end) of the insulating pipe part 44, and is accommodated in the insulating pipe part 44, from the ignition coil body 21 A point in which the plug socket 41 is configured with a high-voltage transmission body that transmits the supplied high voltage to the spark plug, and a retaining mechanism 52 that prevents the high-pressure tower portion 22t from coming out of the insulating pipe portion 44. That is, a locking opening 22wh as a locking portion is provided (having), and an annular wall portion 22w into which one end of the insulating pipe portion 44 is inserted is provided outside the high-pressure tower portion 22t of the insulating case 22. An engaging portion 44h which engages with the locking opening 22wh is a point provided at one end of the insulating pipe part 44.
The engaging portion 44h includes a support piece 44hs formed by a slit provided in one end portion of the insulating pipe portion 44 in parallel from one end, and a claw portion 44hn provided on the outer end of the support piece 44hs. Has been.
Other parts of this embodiment are configured in the same manner as the conventional example.

次に、絶縁パイプ部４４（プラグソケット４１）の高圧タワー部２２ｔへの取付について説明する。
まず、図２（ａ）に示すように、絶縁パイプ部４４の一端の中心線上に高圧タワー部２２ｔの中心線を位置させるとともに、係合部４４ｈの延長線上に係止開口２２ｗｈを位置させる。
そして、高圧タワー部２２ｔを絶縁パイプ部４４の一端（上端）へ挿入し、絶縁パイプ部４４の一端を環状壁部２２ｗへ挿入すると、爪部４４ｈｎが環状壁部２２ｗで押されることによって支持片４４ｈｓが高圧タワー部２２ｔ側へ自身の弾性で撓む。
さらに、絶縁パイプ部４４の一端を環状壁部２２ｗへ挿入し、例えば、絶縁パイプ部４４の一端を絶縁ケース２２に当接させると、支持片４４ｈｓが自身の弾性で元の状態へ復帰し、爪部４４ｈｎが係止開口２２ｗｈに突入して係止開口２２ｗｈの縁（下縁）に係合することにより、図２（ｂ）に示すように、絶縁パイプ部４４を高圧タワー部２２ｔに取り付けることができる。 Next, attachment of the insulating pipe portion 44 (plug socket 41) to the high-pressure tower portion 22t will be described.
First, as shown in FIG. 2A, the center line of the high-pressure tower portion 22t is positioned on the center line of one end of the insulating pipe portion 44, and the locking opening 22wh is positioned on the extension line of the engaging portion 44h.
When the high pressure tower portion 22t is inserted into one end (upper end) of the insulating pipe portion 44 and one end of the insulating pipe portion 44 is inserted into the annular wall portion 22w, the claw portion 44hn is pushed by the annular wall portion 22w, thereby supporting pieces. 44hs bends by its own elasticity toward the high-pressure tower section 22t.
Furthermore, when one end of the insulating pipe portion 44 is inserted into the annular wall portion 22w and, for example, one end of the insulating pipe portion 44 is brought into contact with the insulating case 22, the support piece 44hs returns to its original state by its own elasticity. The claw portion 44hn enters the locking opening 22wh and engages with the edge (lower edge) of the locking opening 22wh, thereby attaching the insulating pipe portion 44 to the high-pressure tower portion 22t as shown in FIG. be able to.

この実施例のように、プラグソケット４１を、高圧タワー部２２ｔが一端に挿入される絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端に取り付けられるブーツ部と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成し、高圧タワー部２２ｔが絶縁パイプ部４４から抜けるのを阻止する抜け止め機構５２を構成する係止開口２２ｗｈを備えた環状壁部２２ｗを絶縁ケース２２に設け、係止開口２２ｗｈに係合し、抜け止め機構５２を構成する係合部４４ｈを絶縁パイプ部４４に設けたので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケット４１を安価に製作することができ、ひいては、内燃機関用点火コイル１１を安価に製作することができ、さらに、点火コイル本体２１とプラグソケット４１とを抜け止め機構５２によって確実に結合させることができる。
そして、係止開口２２ｗｈを有する環状壁部２２ｗで絶縁パイプ部４４の上端外周を覆ったので、沿面距離を長く確保できることにより、絶縁特性が向上し、また、点火コイル本体２１とプラグソケット４１との間から絶縁パイプ部４４内へ液体（水など）が浸入するのを防止することができる。 As in this embodiment, the plug socket 41 is covered with the insulating pipe portion 44 into which the high-voltage tower portion 22t is inserted at one end and the insulator portion of the spark plug having the top electrode, and is connected to the other end of the insulating pipe portion 44. A boot portion to be attached and a high voltage transmission body that is housed in the insulating pipe portion 44 and transmits a high voltage supplied from the ignition coil body 21 to the ignition plug, and the high voltage tower portion 22t is formed from the insulating pipe portion 44. An annular wall portion 22w having a locking opening 22wh that constitutes a retaining mechanism 52 that prevents the retaining mechanism 52 from being pulled out is provided in the insulating case 22, and is engaged with the retaining opening 22wh, and an engaging portion 44h that constitutes the retaining mechanism 52h. Is provided in the insulating pipe portion 44, the number of parts is reduced and the structure (configuration) is simplified.
Further, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket 41 can be manufactured at a low cost, and the ignition coil 11 for an internal combustion engine can be manufactured at a low cost. The ignition coil body 21 and the plug socket 41 can be reliably coupled by the retaining mechanism 52.
And since the upper end outer periphery of the insulation pipe part 44 was covered with the annular wall part 22w which has the latching opening 22wh, by ensuring a creeping distance long, an insulation characteristic improves, and the ignition coil main body 21, the plug socket 41, It is possible to prevent the liquid (water or the like) from entering the insulating pipe portion 44 from between.

図３（ａ），（ｂ）はこの発明のさらに他の実施例である内燃機関用点火コイルの要部拡大図であり、図１、図２または図４と同一または相当部分に同一符号を付し、その説明を省略する。
なお、図３（ａ）は高圧タワー部にプラグソケットを取り付ける前の状態を示し、図３（ｂ）は高圧タワー部にプラグソケットを取り付けた状態を示している。 3 (a) and 3 (b) are enlarged views of a main part of an ignition coil for an internal combustion engine which is still another embodiment of the present invention. The same reference numerals are used for the same or corresponding parts as FIG. 1, FIG. 2 or FIG. A description thereof will be omitted.
FIG. 3A shows a state before the plug socket is attached to the high-pressure tower, and FIG. 3B shows a state where the plug socket is attached to the high-pressure tower.

この実施例が従来例と異なる部分は、従来例のラバー部を省いた点、すなわち、絶縁ケース２２に一体的に設けられた円筒状の高圧タワー部２２ｔが一端（上端）に挿入される絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端（下端）に取り付けられるブーツ部と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とでプラグソケット４１を構成した点と、高圧タワー部２２ｔが絶縁パイプ部４４から抜けるのを阻止する抜け止め機構５２を設けた点、すなわち、先端側（下側）へ尖った二等辺三角柱の係止突起２２ｔｐを係止部として高圧タワー部２２ｔの外周に設け、係止突起２２ｔｐに係合する対向した狭窄部４４ｃｎを上部に備え（有し）、係止突起２２ｔｐを移動しないように収容する収容部４４ｃｒを狭窄部４４ｃｎの下側に備えた（有した）切欠４４ｃを絶縁パイプ部４４に一端に設けた点とである。
この実施例の他の部分は、従来例と同様に構成されている。 This embodiment is different from the conventional example in that the rubber portion of the conventional example is omitted, that is, the cylindrical high voltage tower portion 22t provided integrally with the insulating case 22 is inserted into one end (upper end). A pipe part 44 and a boot part that covers the insulator part of the spark plug having the top electrode and is attached to the other end (lower end) of the insulating pipe part 44, and is accommodated in the insulating pipe part 44, from the ignition coil body 21 A point in which the plug socket 41 is configured with a high-voltage transmission body that transmits the supplied high voltage to the spark plug, and a retaining mechanism 52 that prevents the high-pressure tower portion 22t from coming out of the insulating pipe portion 44. That is, an isosceles triangular prism locking projection 22tp pointed to the distal end side (downward) is provided as an engaging portion on the outer periphery of the high-pressure tower 22t, and the constricted constricted portion 44 that engages with the locking projection 22tp n is provided on the upper side, and a notch 44c provided (has) on the lower side of the narrowed portion 44cn is provided on one end of the insulating pipe portion 44 so as to prevent the locking protrusion 22tp from moving. With a point.
Other parts of this embodiment are configured in the same manner as the conventional example.

次に、絶縁パイプ部４４（プラグソケット４１）の高圧タワー部２２ｔへの取付について説明する。
まず、図３（ａ）に示すように、絶縁パイプ部４４の一端の中心線上に高圧タワー部２２ｔの中心線を位置させるとともに、切欠４４ｃの延長線上に係止突起２２ｔｐを位置させる。
そして、高圧タワー部２２ｔを絶縁パイプ部４４の一端（上端）へ挿入すると、狭窄部４４ｃｎが係止突起２２ｔｐで押されること、切欠４４ｃを設けたことと、絶縁パイプ部４４の弾性とによって順次狭窄部４４ｃｎが拡開する。
さらに、高圧タワー部２２ｔを絶縁パイプ部４４の一端へ挿入し、係止突起２２ｔｐに狭窄部４４ｃｎを拡開させて係止突起２２ｔｐが狭窄部４４ｃｎの間を通過し、収容部４４ｃｒ内へ入ると、狭窄部４４ｃｎが元の状態へ復帰し、係止突起２２ｔｐの上端に係合することにより、図３（ｂ）に示すように、絶縁パイプ部４４を高圧タワー部２２ｔに取り付けることができる。 Next, attachment of the insulating pipe portion 44 (plug socket 41) to the high-pressure tower portion 22t will be described.
First, as shown in FIG. 3A, the center line of the high-pressure tower portion 22t is positioned on the center line of one end of the insulating pipe portion 44, and the locking projection 22tp is positioned on the extension line of the notch 44c.
When the high-pressure tower portion 22t is inserted into one end (upper end) of the insulating pipe portion 44, the narrowed portion 44cn is pushed by the locking projection 22tp, the notch 44c is provided, and the elasticity of the insulating pipe portion 44 is sequentially increased. The narrowed portion 44cn is expanded.
Further, the high-pressure tower portion 22t is inserted into one end of the insulating pipe portion 44, the constriction portion 44cn is expanded on the engagement projection 22tp, and the engagement projection 22tp passes between the constriction portions 44cn and enters the housing portion 44cr. Then, the narrowed portion 44cn returns to its original state and engages with the upper end of the locking projection 22tp, so that the insulating pipe portion 44 can be attached to the high-pressure tower portion 22t as shown in FIG. .

この実施例のように、プラグソケット４１を、高圧タワー部２２ｔが一端に挿入される絶縁パイプ部４４と、点火プラグの、頂部電極を有する絶縁碍子部分に被さり、絶縁パイプ部４４の他端に取り付けられるブーツ部と、絶縁パイプ部４４内に収容され、点火コイル本体２１から供給される高電圧を点火プラグへ伝達する高電圧伝達体とで構成し、高圧タワー部２２ｔが絶縁パイプ部４４から抜けるのを阻止する抜け止め機構５２を構成する係止突起２２ｔｐを高圧タワー部２２ｔの外周に設け、係止突起２２ｔｐに係合し、抜け止め機構５２を構成する狭窄部４４ｃｎを有する切欠４４ｃを絶縁パイプ部４４に設けたので、部品点数が少なくなるとともに、構造（構成）が簡単になる。
また、部品点数が少なくなるとともに、構造（構成）が簡単になることにより、プラグソケット４１を安価に製作することができ、ひいては、内燃機関用点火コイル１１を安価に製作することができ、さらに、点火コイル本体２１とプラグソケット４１とを抜け止め機構５２によって確実に結合させることができる。 As in this embodiment, the plug socket 41 is covered with the insulating pipe portion 44 into which the high-voltage tower portion 22t is inserted at one end and the insulator portion of the spark plug having the top electrode, and is connected to the other end of the insulating pipe portion 44. A boot portion to be attached and a high voltage transmission body that is housed in the insulating pipe portion 44 and transmits a high voltage supplied from the ignition coil body 21 to the ignition plug, and the high voltage tower portion 22t is formed from the insulating pipe portion 44. A locking projection 22tp that constitutes a retaining mechanism 52 that prevents the retaining mechanism 52 from being pulled out is provided on the outer periphery of the high-pressure tower portion 22t. Since the insulating pipe portion 44 is provided, the number of parts is reduced and the structure (configuration) is simplified.
Further, since the number of parts is reduced and the structure (configuration) is simplified, the plug socket 41 can be manufactured at a low cost, and the ignition coil 11 for an internal combustion engine can be manufactured at a low cost. The ignition coil body 21 and the plug socket 41 can be reliably coupled by the retaining mechanism 52.

上記した図１に示した実施例では、外周に接着剤５６を塗布した高圧タワー部２２ｔを絶縁パイプ部４４の一端へ圧入する例を示したが、単に高圧タワー部２２ｔを絶縁パイプ部４４の一端へ圧入したり、高圧タワー部２２ｔを絶縁パイプ部４４の一端へ圧入した後、高圧タワー部２２ｔと絶縁パイプ部４４の一端とを溶着してもよく、また、外周に接着剤５６を塗布した高圧タワー部２２ｔを絶縁パイプ部４４の一端へ挿入して接着させたり、高圧タワー部２２ｔを絶縁パイプ部４４の一端へ挿入して接着剤で接着させたてもよく、また、高圧タワー部２２ｔを絶縁パイプ部４４の一端へ挿入した後、高圧タワー部２２ｔと絶縁パイプ部４４の一端とを溶着してもよく、さらに、高圧タワー部２２ｔが絶縁パイプ部４４から抜けるのを阻止する抜け止め機構を設けるとよい。
また、図２に示した実施例では、係止開口２２ｗｈ（係止部）を備えた環状壁部２２ｗを絶縁ケース２２に設け、係止開口２２ｗｈに係合する係合部４４ｈを絶縁パイプ部４４に設けて抜け止め機構５２を構成した例を示したが、開口または凹部などの係止部を絶縁パイプ部４４に設け、絶縁パイプ部４４の係止部に係合する係合部を絶縁ケース２２に設けてもよい。
また、図３に示した実施例では、係止突起２２ｔｐ（係止部）を高圧タワー部２２ｔの外周に設け、狭窄部４４ｃｎ（係合部）を絶縁パイプ部４４に一端に設けて抜け止め機構５２を構成した例を示したが、開口または凹部などの係止部を絶縁パイプ部４４に設け、絶縁パイプ部４４の係止部に係合する係合部を高圧タワー部２２ｔの外周に設けてもよい。
また、第１、第２導電材４６，５０、第１、第２キャップ４７，４９、抵抗体４８で高電圧伝導体４５を構成した例を示したが、高圧端子２４の高電圧を点火プラグ７１の頂部電極７２へ伝達できる構成であれば、他の構成であってもよい。 In the above-described embodiment shown in FIG. 1, an example in which the high pressure tower portion 22 t having the outer periphery coated with the adhesive 56 is press-fitted into one end of the insulating pipe portion 44 is shown. After press-fitting into one end or press-fitting the high-pressure tower portion 22t into one end of the insulating pipe portion 44, the high-pressure tower portion 22t and one end of the insulating pipe portion 44 may be welded, and an adhesive 56 is applied to the outer periphery. The high-pressure tower portion 22t may be inserted and bonded to one end of the insulating pipe portion 44, or the high-pressure tower portion 22t may be inserted into one end of the insulating pipe portion 44 and bonded with an adhesive. After inserting 22t into one end of the insulating pipe portion 44, the high pressure tower portion 22t and one end of the insulating pipe portion 44 may be welded, and further, the high pressure tower portion 22t is prevented from coming out of the insulating pipe portion 44. That the stopper may be provided a mechanism.
In the embodiment shown in FIG. 2, an annular wall portion 22 w provided with a locking opening 22 wh (locking portion) is provided in the insulating case 22, and the engaging portion 44 h that engages with the locking opening 22 wh is an insulating pipe portion. Although the example in which the retaining mechanism 52 is configured by being provided at 44 is shown, a locking portion such as an opening or a recess is provided at the insulating pipe portion 44 and the engaging portion that engages with the locking portion of the insulating pipe portion 44 is insulated. The case 22 may be provided.
Further, in the embodiment shown in FIG. 3, the locking protrusion 22tp (locking portion) is provided on the outer periphery of the high-pressure tower portion 22t, and the constriction portion 44cn (engagement portion) is provided on one end of the insulating pipe portion 44 to prevent it from coming off. Although the example which comprised the mechanism 52 was shown, the latching | locking parts, such as an opening or a recessed part, are provided in the insulation pipe part 44, and the engaging part engaged with the latching part of the insulation pipe part 44 is on the outer periphery of the high-pressure tower part 22t. It may be provided.
Moreover, although the example in which the high voltage conductor 45 is configured by the first and second conductive materials 46 and 50, the first and second caps 47 and 49, and the resistor 48 has been shown, Other configurations may be used as long as they can be transmitted to the top electrode 72 of 71.

（ａ），（ｂ）はこの発明の一実施例である内燃機関用点火コイルの一部を破断した正面図である。(A), (b) is the front view which fractured | ruptured a part of ignition coil for internal combustion engines which is one Example of this invention. （ａ），（ｂ）はこの発明の他の実施例である内燃機関用点火コイルの要部拡大図である。(A), (b) is the principal part enlarged view of the ignition coil for internal combustion engines which is another Example of this invention. （ａ），（ｂ）はこの発明のさらに他の実施例である内燃機関用点火コイルの要部拡大図である。(A), (b) is the principal part enlarged view of the ignition coil for internal combustion engines which is further another Example of this invention. 従来の内燃機関用点火コイルをエンジンに取り付けた状態の概略構成を示す部分断面図である。It is a fragmentary sectional view which shows schematic structure of the state which attached the conventional ignition coil for internal combustion engines 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
２２ｔｐ係止突起（係止部）
２２ｗ環状壁部
２２ｗｈ係止開口（係止部）
２４高圧端子（二次端子）
３４取付ねじ
４１プラグソケット
４２ラバー部
４３ブーツ部
４４絶縁パイプ部
４４ｐ肉盛り部
４４ｓ係止段部
４４ｈ係合部
４４ｈｓ支持片
４４ｈｎ爪部
４４ｃ切欠
４４ｃｎ狭窄部（係合部）
４４ｃｒ収容部
４５高電圧伝達体
４６第１導電材
４７第１キャップ
４７ｈ保持爪
４８抵抗体
４９第２キャップ
４９ｈ保持爪
５０第２導電材
５０ｂ太径部
５２抜け止め機構
５６接着剤
６１エンジン
６２プラグホール
６２ｓ取付ねじ孔
６３取付部
７１点火プラグ
７２頂部電極
７３中心電極
７４絶縁碍子
７５金具
７５ｓ雄ねじ部
７５ｅ電極 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-pressure tower part 22tp Locking protrusion (locking part)
22w annular wall part 22wh locking opening (locking part)
24 High voltage terminal (secondary terminal)
34 Mounting screw 41 Plug socket 42 Rubber part 43 Boot part 44 Insulating pipe part 44p Overlaying part 44s Locking step part 44h Engaging part 44hs Supporting piece 44hn Claw part 44c Notch 44cn Narrow part (engaging part)
44cr housing part 45 high voltage transmission body 46 first conductive material 47 first cap 47h holding claw 48 resistor 49 second cap 49h holding claw 50 second conductive material 50b large diameter part 52 retaining mechanism 56 adhesive 61 engine 62 plug Hole 62s Mounting screw hole 63 Mounting portion 71 Spark plug 72 Top electrode 73 Center electrode 74 Insulator 75 Metal fitting 75s Male thread portion 75e Electrode

Claims

The insulating pipe part, the insulator part having the top electrode of the spark plug, the boot part attached to the other end of the insulating pipe part, and the high voltage transmission body accommodated in the insulating pipe part A plug socket mounting method in an ignition coil for an internal combustion engine in which one end of the insulating pipe of the plug socket is attached to a high voltage tower portion of an ignition coil body that generates a high voltage,
Press-fit the high-pressure tower part coated with adhesive on the outer periphery to one end of the insulating pipe part,
A plug socket mounting method for an ignition coil for an internal combustion engine.

The insulating pipe part, the insulator part having the top electrode of the spark plug, the boot part attached to the other end of the insulating pipe part, and the high voltage transmission body accommodated in the insulating pipe part A plug socket mounting method in an ignition coil for an internal combustion engine in which one end of the insulating pipe of the plug socket is attached to a high voltage tower portion of an ignition coil body that generates a high voltage,
After press-fitting the high-pressure tower part into one end of the insulating pipe part, the high-pressure tower part and one end of the insulating pipe part are welded.
A plug socket mounting method for an ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is covered with an insulating pipe portion that is attached to the high-pressure tower portion with the high-pressure tower portion being press-fitted into one end, and an insulator portion having a top electrode of the spark plug, and is attached to the other end of the insulating pipe portion. The boot portion to be attached, and the high voltage transmission body that is accommodated in the insulating pipe portion and transmits the high voltage supplied from the ignition coil body to the ignition plug,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to claim 3,
The high-pressure tower part and one end of the insulating pipe part were bonded with an adhesive,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to claim 3,
Welded the high-pressure tower part and one end of the insulating pipe part,
An ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is placed on one end of the high-pressure tower portion, and an insulating pipe portion attached to the high-pressure tower portion by an adhesive, and an insulator portion having a top electrode of the spark plug, and the insulating pipe portion A boot portion attached to the other end, and a high voltage transmission body that is housed in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug,
An ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is covered with an insulating pipe portion that is inserted into one end of the high-voltage tower portion and attached to the high-pressure tower portion by welding, and an insulator portion having a top electrode of the spark plug. A boot portion attached to the end, and a high voltage transmission body that is accommodated in the insulating pipe portion and transmits a high voltage supplied from the ignition coil body to the ignition plug,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 3 to 7,
The ignition coil main body is provided with one of a locking part that constitutes a retaining mechanism that prevents the high-pressure tower part from coming off from the insulating pipe part, and an engaging part that engages with the locking part,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 3 to 7,
A wall portion provided with one of a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with the locking portion is provided on the high-pressure tower. Provided outside the high-pressure tower part of the insulating case provided with a part,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to any one of claims 3 to 7,
One of a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with the locking portion is provided on the outer periphery of the high-pressure tower portion,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is covered with an insulating pipe portion into which the high-pressure tower portion is inserted at one end, an insulator portion having a top electrode of the spark plug, and a boot portion attached to the other end of the insulating pipe portion, It is housed in an insulating pipe part, and comprises a high voltage transmission body that transmits a high voltage supplied from the ignition coil body to the spark plug,
The ignition coil main body is provided with one of a locking part that constitutes a retaining mechanism that prevents the high-pressure tower part from coming off from the insulating pipe part, and an engaging part that engages with the locking part,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is covered with an insulating pipe portion into which the high-pressure tower portion is inserted at one end, an insulator portion having a top electrode of the spark plug, and a boot portion attached to the other end of the insulating pipe portion, It is housed in an insulating pipe part, and comprises a high voltage transmission body that transmits a high voltage supplied from the ignition coil body to the spark plug,
A wall portion provided with one of a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with the locking portion is provided on the high-pressure tower. Provided outside the high-pressure tower part of the insulating case provided with a part,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

In an ignition coil for an internal combustion engine comprising an ignition coil body that generates a high voltage, and a plug socket that is attached to a high-voltage tower portion of the ignition coil body and transmits a high voltage supplied from the ignition coil body to an ignition plug.
The plug socket is covered with an insulating pipe portion into which the high-pressure tower portion is inserted at one end, an insulator portion having a top electrode of the spark plug, and a boot portion attached to the other end of the insulating pipe portion, It is housed in an insulating pipe part, and comprises a high voltage transmission body that transmits a high voltage supplied from the ignition coil body to the spark plug,
One of a locking portion that constitutes a retaining mechanism that prevents the high-pressure tower portion from coming off from the insulating pipe portion, and an engaging portion that engages with the locking portion is provided on the outer periphery of the high-pressure tower portion,
The other of the engaging portion and the engaging portion constituting the retaining mechanism is provided in the insulating pipe portion,
An ignition coil for an internal combustion engine.

The ignition coil for an internal combustion engine according to claim 9 or 12,
The wall is formed in an annular shape,
An ignition coil for an internal combustion engine.