JPH10303045A - High-voltage terminal side connection device for ignition coil - Google Patents
High-voltage terminal side connection device for ignition coilInfo
- Publication number
- JPH10303045A JPH10303045A JP9105624A JP10562497A JPH10303045A JP H10303045 A JPH10303045 A JP H10303045A JP 9105624 A JP9105624 A JP 9105624A JP 10562497 A JP10562497 A JP 10562497A JP H10303045 A JPH10303045 A JP H10303045A
- Authority
- JP
- Japan
- Prior art keywords
- voltage terminal
- spring
- press
- preventing
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、点火コイルの高電
圧が印加される高圧端子を導電性のスプリングを介して
点火プラグに電気的に接続する点火コイルの高圧端子側
接続装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition coil high-voltage terminal-side connection device for electrically connecting a high voltage terminal of an ignition coil to which a high voltage is applied to a spark plug via a conductive spring. .
【０００２】[0002]
【従来の技術】従来の点火コイルの高圧端子側接続装置
は、例えば図４に示すように、高圧端子１を樹脂製の高
圧タワー部２にインサート成形し、高圧タワー部２内に
形成されたスプリング収納空間３内に導電性のスプリン
グ４を下方から挿入して、該スプリング４の上部を高圧
端子１の内径空洞部５に嵌め込んだものがある。このも
のでは、スプリング４の脱落を防止するために、高圧端
子１の内径空洞部５に環状溝形状のアンダカット部６を
切削加工して、該アンダカット部６の下端に係止凸部７
を形成すると共に、スプリング４の上端部に径を大きく
した大径部４ａを形成し、この大径部４ａをアンダカッ
ト部６に嵌め込んで係止凸部７で抜け止めするようにし
ている。これと同じスプリング脱落防止構造が特公平７
−１０９８１０号公報にも記載されている。2. Description of the Related Art A conventional high voltage terminal side connection device for an ignition coil, as shown in FIG. 4, for example, insert-molds a high voltage terminal 1 into a high voltage tower 2 made of resin and is formed in the high voltage tower 2. There is a type in which a conductive spring 4 is inserted into the spring storage space 3 from below, and the upper part of the spring 4 is fitted into the inner diameter cavity 5 of the high voltage terminal 1. In this embodiment, in order to prevent the spring 4 from falling off, an annular groove-shaped undercut portion 6 is cut into the inner diameter cavity portion 5 of the high voltage terminal 1, and a locking projection 7 is formed at the lower end of the undercut portion 6.
And a large-diameter portion 4a having a large diameter is formed at the upper end of the spring 4, and the large-diameter portion 4a is fitted into the undercut portion 6 to be prevented from coming off by the locking projection 7. . The same spring fall prevention structure
It is also described in JP-A-109810.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の構成では、スプリング４の脱落防止のために、高圧
端子１の内径空洞部５にアンダカット部６を切削加工す
る必要があり、その切削加工に手間がかかって、コスト
高になる欠点があった。However, in the above-mentioned conventional structure, it is necessary to cut the undercut portion 6 in the hollow portion 5 of the inner diameter of the high-voltage terminal 1 in order to prevent the spring 4 from falling off. , Which is troublesome and increases the cost.
【０００４】本発明はこのような事情を考慮してなされ
たものであり、従ってその目的は、高圧端子の内径空洞
部にアンダカット部を切削加工しなくても、スプリング
の脱落を防止することができ、生産性向上とコスト低減
とを実現することができる点火コイルの高圧端子側接続
装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to prevent a spring from falling off without cutting an undercut portion in a hollow portion of an inner diameter of a high voltage terminal. It is an object of the present invention to provide a high-voltage terminal-side connection device for an ignition coil, which can improve productivity and reduce costs.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１の点火コイルの高圧端子側接続装
置は、樹脂製の高圧タワー部に、高圧端子を上方から圧
入する圧入部とスプリングを収納する空間とを成形し、
スプリングの上部側に径を大きくした大径部を形成する
と共に、前記高圧タワー部には、スプリングの収納空間
のうちの前記大径部よりも下方側の部分の最小内径を前
記大径部の外径より小さくする脱落防止部を形成したも
のである。In order to achieve the above object, according to the first aspect of the present invention, there is provided a connection device for a high-voltage terminal of an ignition coil, which press-fits a high-voltage terminal into a resin high-pressure tower from above. Form the part and the space to store the spring,
A large-diameter portion having a large diameter is formed on the upper side of the spring, and the high-pressure tower portion has a minimum inner diameter of a portion of the storage space for the spring below the large-diameter portion, which is smaller than the large-diameter portion. In this case, a falling-off preventing portion smaller than the outer diameter is formed.
【０００６】ところで、従来のように高圧端子を高圧タ
ワー部にインサート成形する構成では、本発明のように
高圧タワー部に脱落防止部を一体成形しようとしても、
成形時に高圧端子が邪魔になるため、脱落防止部の成形
がアンダカットになってしまい、成形が非常に困難であ
る。By the way, in a conventional configuration in which a high-voltage terminal is insert-molded in a high-voltage tower, even if an attempt is made to integrally form a drop-preventing portion in the high-voltage tower as in the present invention,
Since the high-voltage terminal hinders the molding, the falling-off prevention portion is undercut, which makes it very difficult to mold.
【０００７】これに対し、本発明では、高圧端子を高圧
タワー部の圧入部内に後圧入する構成を採用しているた
め、成形時に圧入部内の空間を成形型の型抜き穴として
利用することができ、従来の高圧端子インサート成形方
式ではアンダカットになる脱落防止部の樹脂一体成形を
アンダカットにならずに実現できる。これにより、高圧
端子の内径空洞部にアンダカット部を切削加工する必要
がなくなり、高圧端子の加工が簡単になる。しかも、高
圧タワー部に脱落防止部を一体成形できるため、高圧タ
ワー部の成形工程の工数が増加せず、上述した高圧端子
の加工容易性と相俟って、生産性向上とコスト低減とを
実現することができる。On the other hand, the present invention employs a configuration in which the high-voltage terminal is post-press-fitted into the press-fit portion of the high-pressure tower portion, so that the space in the press-fit portion can be used as a mold release hole during molding. With the conventional high-voltage terminal insert molding method, it is possible to realize the integral molding of the resin of the falling-off prevention portion that becomes an undercut without using the undercut. This eliminates the need to cut the undercut portion in the hollow portion of the inner diameter of the high-voltage terminal, and simplifies the processing of the high-voltage terminal. In addition, since the falling-off preventing portion can be integrally formed with the high-pressure tower, the number of steps in the forming process of the high-pressure tower does not increase, and in conjunction with the above-described ease of processing the high-voltage terminal, productivity improvement and cost reduction can be achieved. Can be realized.
【０００８】この場合、請求項２のように、脱落防止部
は、前記圧入部への高圧端子の圧入量を規制するストッ
パを兼ねるように形成しても良い。このようにすれば、
成形型の形状を簡単化することができ、成形コスト低減
にも役立つ。In this case, the falling-off preventing portion may be formed so as to also serve as a stopper for restricting the amount of press-fitting of the high-voltage terminal into the press-fitting portion. If you do this,
The shape of the mold can be simplified, which also helps to reduce the molding cost.
【０００９】また、請求項３のように、高圧タワー部
に、脱落防止部から下方に延びるガイドリブをスプリン
グとの間の隙間が下方側ほど大きくなるように形成して
も良い。このようにすれば、点火プラグの端子にスプリ
ングを接続する際に、ガイドリブがスプリングの横方向
への撓み変形を適度に規制するガイドとなり、点火プラ
グの端子とスプリングとの接続を確実に行うことができ
る。また、組立時に、高圧端子を圧入部に圧入した後に
高圧タワー部の下方からスプリングの大径部を脱落防止
部の上方に押し込む場合には、スプリングを上方に押し
込む過程でガイドリブがスプリングの大径部の径をスム
ーズに縮小変形させる役割を果たし、スプリングの組付
作業を容易に行うことができる。According to a third aspect of the present invention, a guide rib extending downward from the falling-off preventing portion may be formed in the high-pressure tower so that a gap between the spring and the spring becomes larger toward the lower side. With this configuration, when connecting the spring to the terminal of the ignition plug, the guide rib serves as a guide for appropriately restricting the bending deformation of the spring in the lateral direction, and the connection between the terminal of the ignition plug and the spring is reliably performed. Can be. Also, when assembling, if the large-diameter part of the spring is pushed from above the high-pressure tower part above the fall-off prevention part after the high-voltage terminal is pressed into the press-fitting part, the guide ribs are moved in the process of pushing the spring upward. It plays a role of smoothly reducing and deforming the diameter of the portion, so that the operation of assembling the spring can be easily performed.
【００１０】[0010]
【発明の実施の形態】以下、本発明をスティック型の点
火コイル１１に適用した実施形態（１）を図１及び図２
に基づいて説明する。まず、図２に基づいて点火コイル
１１全体の構成を説明する。絶縁性樹脂で円筒状に成形
されたコイルケース１２内には、中心部と外周側にそれ
ぞれ棒状の鉄心１３と円筒状の鉄心１４が同心状に収納
されている。円筒状の鉄心１４の内周側には、ボビン１
５に巻回された一次コイル１６が装着され、更に、その
内周側には、ボビン１７に巻回された二次コイル１８が
装着されている。コイルケース１２の空間部には、封止
樹脂としてエポキシ系熱硬化性樹脂等の熱硬化性樹脂２
５が真空充填されている。1 and 2 show an embodiment (1) in which the present invention is applied to a stick type ignition coil 11. FIG.
It will be described based on. First, the overall configuration of the ignition coil 11 will be described with reference to FIG. A rod-shaped iron core 13 and a cylindrical iron core 14 are concentrically housed at the center and the outer peripheral side, respectively, in a coil case 12 formed into a cylindrical shape with an insulating resin. A bobbin 1 is provided on the inner peripheral side of the cylindrical iron core 14.
A primary coil 16 wound around 5 is mounted, and a secondary coil 18 wound around a bobbin 17 is mounted on the inner peripheral side. In the space of the coil case 12, a thermosetting resin 2 such as an epoxy thermosetting resin is used as a sealing resin.
5 is vacuum filled.
【００１１】一方、コイルケース１２の上部には、取付
用のボルト挿通部１９とコネクタ２０とが設けられ、こ
のコネクタ２０には、一次コイル１６の両端が接続され
た２本のターミナル２１（１本のみ図示）がインサート
成形されている。一次コイル１６の一端は一方のターミ
ナル２１を介してバッテリ（図示せず）に接続され、他
端は他方のターミナル２１を介してイグナイタ（図示せ
ず）に接続される。また、二次コイル１８の一端は一次
コイル１６側又はアースに接続され、他端は後述する高
圧端子２２に接続されている。On the other hand, a bolt insertion portion 19 for mounting and a connector 20 are provided on the upper part of the coil case 12. The connector 20 has two terminals 21 (1) to which both ends of the primary coil 16 are connected. (Only book shown) is insert molded. One end of the primary coil 16 is connected to a battery (not shown) via one terminal 21, and the other end is connected to an igniter (not shown) via the other terminal 21. One end of the secondary coil 18 is connected to the primary coil 16 side or the ground, and the other end is connected to a high voltage terminal 22 described later.
【００１２】次に、コイルケース１２の下端部に組み付
けられた高圧タワー部２３の構造を図１に基づいて説明
する。高圧タワー部２３は、絶縁性樹脂により成形さ
れ、その上端部がコイルケース１２の下端部に圧入嵌合
され、接着剤等により気密に固着されている。この高圧
タワー部２３の内部には、高圧端子２２を上方から圧入
するための筒状の圧入部２４が一体成形されている。高
圧端子２２と圧入部２４との圧入深さや圧接力は、熱硬
化性樹脂２５（図２参照）をコイルケース１２から高圧
タワー部２３内に真空充填した時に該熱硬化性樹脂２５
が高圧端子２２と圧入部２４との圧入部分から漏れない
ように設計されている。また、圧入部２４の外周部に空
間部（熱硬化性樹脂２５の充填部）を形成することで、
圧入部２４の肉厚を他の部分と同じ程度の肉厚とし、樹
脂成形時のボイドの発生を防いで、成形性を向上させる
と共に、圧入部２４の全周を熱硬化性樹脂２５の充填部
で包囲することで、耐久性を向上させている。Next, the structure of the high-pressure tower 23 assembled to the lower end of the coil case 12 will be described with reference to FIG. The high-pressure tower 23 is formed of an insulating resin, and the upper end thereof is press-fitted to the lower end of the coil case 12 and is air-tightly fixed with an adhesive or the like. Inside the high-pressure tower portion 23, a cylindrical press-fit portion 24 for press-fitting the high-voltage terminal 22 from above is integrally formed. The press-fit depth and press-contact force between the high-voltage terminal 22 and the press-fit portion 24 are determined by the thermosetting resin 25 (see FIG. 2) when the thermosetting resin 25 (see FIG. 2) is vacuum-filled from the coil case 12 into the high-pressure tower portion 23.
Is designed not to leak from the press-fit portion between the high-voltage terminal 22 and the press-fit portion 24. In addition, by forming a space portion (a portion filled with the thermosetting resin 25) on the outer peripheral portion of the press-fit portion 24,
The thickness of the press-fit portion 24 is set to the same thickness as other portions to prevent the occurrence of voids during resin molding, to improve moldability, and to fill the entire circumference of the press-fit portion 24 with the thermosetting resin 25. The durability is improved by surrounding the part.
【００１３】一方、高圧端子２２は、例えばアルミニウ
ム、真鍮等の金属の切削加工により形成され、その上部
には、二次コイル１８と接続する凸部２２ａが形成され
ている。この高圧端子２２の下半部には、導電性のスプ
リング２６の上部を挿着する内径空洞部２２ｂが下向き
に形成されている。また、スプリング２６の上端部に
は、径を大きくした脱落防止用の大径部２６ａが形成さ
れている。On the other hand, the high voltage terminal 22 is formed by cutting a metal such as aluminum, brass or the like, and a convex portion 22a connected to the secondary coil 18 is formed on an upper portion thereof. In the lower half of the high-voltage terminal 22, an inner diameter hollow portion 22b into which the upper part of the conductive spring 26 is inserted is formed downward. A large-diameter portion 26a having a large diameter for preventing falling off is formed at the upper end of the spring 26.
【００１４】前記圧入部２４の下端には、スプリング２
６の脱落を防止する脱落防止部２７が高圧端子２２の圧
入量を規制するストッパを兼ねるように形成されてい
る。この場合、脱落防止部２７は、圧入部２４の下端全
周に環状に形成され、圧入部２４の下方に形成されたス
プリング収納空間２８の内径が脱落防止部２７で最小に
なると共に、この脱落防止部２７の内径（スプリング収
納空間２８の最小内径）がスプリング２６の大径部２６
ａの外径より小さく設定されている。これにより、スプ
リング２６の大径部２６ａが脱落防止部２７に係止さ
れ、スプリング２６の脱落が防止される。At the lower end of the press-fit portion 24, a spring 2
6 is formed so as to also serve as a stopper for restricting the amount of press-fit of the high voltage terminal 22. In this case, the fall-off preventing portion 27 is formed in an annular shape around the lower end of the press-fitting portion 24, and the inner diameter of the spring storage space 28 formed below the press-fitting portion 24 is minimized by the fall-off preventing portion 27. The inner diameter of the preventing portion 27 (the minimum inner diameter of the spring storage space 28) is
It is set smaller than the outer diameter of a. As a result, the large diameter portion 26a of the spring 26 is locked by the fall prevention portion 27, and the fall of the spring 26 is prevented.
【００１５】また、高圧タワー部２３内には、脱落防止
部２７から下方に延びる複数のガイドリブ２９がスプリ
ング２６との間の隙間が下方側ほど大きくなるように形
成されている。高圧タワー部２３の下部側は筒状に形成
され、そこにゴム製のプラグキャップ３０が嵌合装着さ
れている。この高圧タワー部２３のプラグキャップ３０
を点火プラグ（図示せず）の上部に圧入することで、該
プラグキャップ３０の弾性圧着力により両者の連結状態
を保持すると共に、スプリング２６が点火プラグの端子
に圧接した状態となり、それによって、二次コイル１８
の一端が高圧端子２２とスプリング２６を介して点火プ
ラグの端子に電気的に接続された状態となる。また、ス
プリング２６を点火プラグの端子に圧接させる際に、脱
落防止部２７から下方に延びるガイドリブ２９がスプリ
ング２６の横方向への撓み変形を適度に規制するガイド
となり、点火プラグの端子とスプリング２６との接続を
確実に行うことができる。In the high-pressure tower section 23, a plurality of guide ribs 29 extending downward from the falling-off prevention section 27 are formed so that the gap between the spring 26 and the guide rib 29 becomes larger toward the lower side. The lower side of the high-pressure tower section 23 is formed in a cylindrical shape, and a rubber plug cap 30 is fitted and attached thereto. The plug cap 30 of the high-pressure tower section 23
Is press-fitted into the upper portion of a spark plug (not shown), whereby the connection between the two is maintained by the elastic crimping force of the plug cap 30, and the spring 26 is brought into a state of being pressed against the terminal of the spark plug. Secondary coil 18
Is electrically connected to the terminal of the spark plug via the high voltage terminal 22 and the spring 26. When the spring 26 is pressed against the terminal of the spark plug, a guide rib 29 extending downward from the drop-off preventing portion 27 serves as a guide for appropriately restricting the lateral deformation of the spring 26, and the terminal of the spark plug and the spring 26 Can be reliably connected.
【００１６】次に、高圧タワー部２３内への高圧端子２
２とスプリング２６の組付手順を説明する。高圧タワー
部２３は、高圧端子２２をインサートせずに成形する。
この高圧タワー部２３の圧入部２４に上方から高圧端子
２２を圧入する際に、高圧端子２２の内径空洞部２２ｂ
内にスプリング２６を挿入して組み付けた状態で、該高
圧端子２２を圧入部２４に上方から圧入し、高圧端子２
２とスプリング２６を同時に組み付ける。Next, the high voltage terminal 2 is inserted into the high voltage tower 23.
2 and the procedure for assembling the spring 26 will be described. The high-voltage tower section 23 is formed without inserting the high-voltage terminal 22.
When the high-voltage terminal 22 is press-fitted into the press-fit portion 24 of the high-pressure tower portion 23 from above, the inner diameter cavity portion 22b of the high-voltage terminal 22
The high-voltage terminal 22 is press-fitted into the press-fitting portion 24 from above with the spring 26 inserted therein.
2 and the spring 26 are assembled at the same time.
【００１７】或は、他の組付方法として、スプリング２
６を組付けずに、高圧端子２２のみを圧入部２４に上方
から圧入し、その後、スプリング２６を高圧タワー部２
３の下方からスプリング２６の大径部２６ａを脱落防止
部２７の上方に押し込んで高圧端子２２の内径空洞部２
２ｂ内に挿着しても良い。この際、スプリング２６を上
方に押し込む過程で、脱落防止部２７の下方に位置する
ガイドリブ２９がスプリング２６の大径部２６ａの径を
スムーズに縮小変形させる役割を果たし、スプリング２
６の組付作業を容易に行うことができる。Alternatively, as another assembling method, the spring 2
6, only the high-voltage terminal 22 is press-fitted into the press-fitting portion 24 from above, and then the spring 26 is connected to the high-pressure tower portion 2.
3, the large-diameter portion 26 a of the spring 26 is pushed above the fall-off preventing portion 27, and the inner-diameter hollow portion 2 of the high-voltage terminal 22 is pressed.
2b may be inserted. At this time, in the process of pushing the spring 26 upward, the guide rib 29 located below the falling-off prevention portion 27 plays a role of smoothly reducing and deforming the diameter of the large-diameter portion 26a of the spring 26.
6 can be easily performed.
【００１８】上述したいずれかの方法で、高圧タワー部
２３内に高圧端子２２とスプリング２６とを組み付けた
後、この高圧タワー部２３の上端部を、鉄心１３，１４
やコイル１６，１８等が組み付けられたコイルケース１
２の下端部に圧入して、両者を接着剤等により気密に固
着する。この後、コイルケース１２内にその上端開口部
から熱硬化性樹脂２５を真空充填すると共に、その熱硬
化性樹脂２５の一部をコイルケース１２から高圧タワー
部２３内に侵入させて充填する。After assembling the high-voltage terminal 22 and the spring 26 in the high-voltage tower 23 by any of the above-described methods, the upper end of the high-voltage tower 23 is connected to the iron cores 13 and 14.
Case 1 in which coils 16 and 18 are assembled
2 is press-fitted into the lower end, and both are air-tightly fixed with an adhesive or the like. Thereafter, the thermosetting resin 25 is vacuum-filled into the coil case 12 from the upper end opening, and a part of the thermosetting resin 25 is made to penetrate into the high-pressure tower 23 from the coil case 12 and filled.
【００１９】ところで、従来は、図４に示すように、高
圧端子１を高圧タワー部２にインサート成形する構造で
あるため、上記実施形態（１）のように高圧タワー部２
に脱落防止部を一体成形しようとしても、成形時に高圧
端子１が邪魔になって、脱落防止部の成形がアンダカッ
トになってしまい、成形が非常に困難である。By the way, as shown in FIG. 4, the conventional structure has a structure in which the high-voltage terminal 1 is insert-molded into the high-voltage tower section 2.
Even if it is attempted to integrally form the falling-off preventing portion, the high-voltage terminal 1 becomes an obstacle during molding, and the forming of the falling-off preventing portion is undercut, which is very difficult to form.
【００２０】これに対し、上記実施形態（１）では、高
圧端子２２を高圧タワー部２３の圧入部２４内に後圧入
する構成を採用しているため、高圧タワー部２３の成形
時に圧入部２４内の空間を成形型の型抜き穴として利用
して脱落防止部２７の上端面を成形することができ、従
来の高圧端子インサート成形方式ではアンダカットにな
る脱落防止部２７の樹脂一体成形をアンダカットになら
ずに実現できる。これにより、従来（図４参照）とは異
なり、高圧端子２２の内径空洞部２２ｂにアンダカット
部を切削加工する必要がなくなり、高圧端子２２の加工
が簡単になる。しかも、高圧タワー部２３に脱落防止部
２７を一体成形できるため、高圧タワー部２３の成形工
程の工数が増加せず、上述した高圧端子２２の加工容易
性と相俟って、生産性向上とコスト低減とを実現するこ
とができる。On the other hand, in the embodiment (1), since the high-pressure terminal 22 is post-press-fitted into the press-fit portion 24 of the high-pressure tower portion 23, the press-fit portion 24 is formed when the high-pressure tower portion 23 is formed. The upper end surface of the falling-off preventing portion 27 can be formed by using the inner space as a mold release hole of a molding die, and the resin integral molding of the falling-off preventing portion 27 that is undercut in the conventional high-voltage terminal insert molding method is performed. It can be realized without cutting. Thereby, unlike the conventional case (see FIG. 4), it is not necessary to cut the undercut portion in the inner diameter hollow portion 22b of the high voltage terminal 22, and the processing of the high voltage terminal 22 is simplified. In addition, since the falling-off preventing portion 27 can be integrally formed with the high-pressure tower portion 23, the number of steps of the forming process of the high-pressure tower portion 23 does not increase, and the ease of processing the high-voltage terminal 22 described above improves productivity. Cost reduction can be realized.
【００２１】本発明は、圧入部２４への高圧端子２２の
圧入量を規制するストッパを脱落防止部２７とは別に形
成しても良いが、上記実施形態（１）のように、脱落防
止部２７が圧入部２４への高圧端子２２の圧入量を規制
するストッパを兼用するように成形すれば、成形型の形
状を簡単化することができ、成形コスト低減にも役立
つ。According to the present invention, a stopper for regulating the amount of press-fitting of the high-voltage terminal 22 into the press-fitting portion 24 may be formed separately from the fall-off preventing portion 27. However, as in the embodiment (1), the stopper is provided. If the mold 27 is formed so as to also serve as a stopper for regulating the press-fit amount of the high-voltage terminal 22 into the press-fitting portion 24, the shape of the mold can be simplified and the molding cost can be reduced.
【００２２】以上説明した実施形態（１）では、高圧端
子２２に内径空洞部２２ｂを形成して、この内径空洞部
２２ｂ内にスプリング２６の上部を嵌め込むようにした
が、図３に示す本発明の実施形態（２）では、高圧端子
３１に内径空洞部を形成せずに、高圧端子３１の下面を
平坦面に形成し、脱落防止部２７上に載せたスプリング
２６の大径部２６ａを、圧入部２４内に圧入した高圧端
子３１で挟み付けて固定するようにしている。これ以外
は、前記実施形態（１）と同じ構成であるので、同一符
号を付して説明を省略する。組付手順は、まず、スプリ
ング２６を高圧タワー部２３の上方から圧入部２４に挿
入してスプリング２６の大径部２６ａを脱落防止部２７
上に載せた状態にし、その後、高圧端子３１を圧入部２
４内に圧入すれば良い。このように構成した実施形態
（２）でも、前記実施形態（１）と同じ効果を得ること
ができる。In the embodiment (1) described above, the inner diameter cavity 22b is formed in the high voltage terminal 22, and the upper portion of the spring 26 is fitted into the inner diameter cavity 22b. In the embodiment (2) of the present invention, the lower surface of the high-voltage terminal 31 is formed flat without forming the inner diameter cavity portion in the high-voltage terminal 31, and the large-diameter portion 26 a of the spring 26 placed on the falling-off preventing portion 27 is formed. And the high-pressure terminal 31 press-fitted into the press-fitting portion 24 for fixing. Except for this, the configuration is the same as that of the above-described embodiment (1). The assembling procedure is as follows. First, the spring 26 is inserted into the press-fitting portion 24 from above the high-pressure tower portion 23 and the large-diameter portion 26 a of the spring 26 is
The high-voltage terminal 31 is then placed on the press-fit portion 2.
4 may be press-fitted. In the embodiment (2) configured as described above, the same effect as in the embodiment (1) can be obtained.
【００２３】尚、上記各実施形態では、脱落防止部２７
を圧入部２４の下端全周に環状に形成したが、圧入部２
４の下端又はその下方に複数個の凸部を脱落防止部とし
て形成しても良く、要は、これらの脱落防止部によって
プリング収納空間２８の最小内径をスプリング２６の大
径部２６ａの外径より小さくすれば良い。In each of the above embodiments, the falling-off preventing portion 27 is used.
Is formed in an annular shape all around the lower end of the press-fitting portion 24.
A plurality of protrusions may be formed at the lower end of or below the lower end of the spring as a fall-off preventing portion. In short, the minimum inside diameter of the pulling storage space 28 is reduced by these fall-off preventing portions to the outside diameter of the large diameter portion 26 a of the spring 26. What is necessary is just to make it smaller.
【００２４】また、上記各実施形態では、高圧タワー部
２３をコイルケース１２とは別体に形成し、両者を接着
等により結合するようにしたが、両者を絶縁性樹脂で一
体成形するようにしても良い。In each of the above embodiments, the high-pressure tower portion 23 is formed separately from the coil case 12 and the two are joined by bonding or the like. However, both are integrally molded with an insulating resin. May be.
【００２５】また、上記各実施形態は、本発明をスティ
ック型の点火コイル１１に適用したものであるが、特公
平７−１０９８１０号公報に示すように、スティック型
以外のＳ−ＤＬＩ方式の点火コイルにも本発明を適用し
て実施できる。In each of the above embodiments, the present invention is applied to a stick-type ignition coil 11. As shown in Japanese Patent Publication No. 7-109810, an S-DLI type ignition other than the stick-type ignition coil is used. The present invention can be applied to coils as well.
【図１】本発明の実施形態（１）における高圧タワー部
の構造を示す縦断面図FIG. 1 is a longitudinal sectional view showing a structure of a high-pressure tower section according to an embodiment (1) of the present invention.
【図２】スティック型の点火コイル全体の縦断面図FIG. 2 is a longitudinal sectional view of the entire stick type ignition coil.
【図３】本発明の実施形態（２）における高圧タワー部
の構造を示す縦断面図FIG. 3 is a longitudinal sectional view showing a structure of a high-pressure tower section according to the embodiment (2) of the present invention.
【図４】従来の高圧タワー部の構成例を示す縦断面図FIG. 4 is a longitudinal sectional view showing a configuration example of a conventional high-pressure tower unit.
１１…点火コイル、１２…コイルケース、１３，１４…
鉄心、１６…一次コイル、１８…二次コイル、２２…高
圧端子、２２ｂ…内径空洞部、２３…高圧タワー部、２
４…圧入部、２５…熱硬化性樹脂、２６…スプリング、
２６ａ…大径部、２７…脱落防止部、２８…スプリング
収納空間、２９…ガイドリブ、３０…プラグキャップ、
３１…高圧端子。11: ignition coil, 12: coil case, 13, 14 ...
Iron core, 16: Primary coil, 18: Secondary coil, 22: High voltage terminal, 22b: Inner diameter cavity, 23: High voltage tower, 2
4 ... Press-fitting part, 25 ... Thermosetting resin, 26 ... Spring,
26a: large-diameter portion, 27: drop-off prevention portion, 28: spring storage space, 29: guide rib, 30: plug cap,
31 ... High voltage terminal.
Claims (3)
子を導電性のスプリングを介して点火プラグに接続する
ものにおいて、 前記高圧端子を上方から圧入する圧入部と前記スプリン
グを収納する空間とを成形した樹脂製の高圧タワー部を
備え、 前記スプリングの上部側に径を大きくした大径部を形成
すると共に、前記高圧タワー部には、前記スプリングの
収納空間のうちの前記大径部よりも下方側の部分の最小
内径を前記大径部の外径より小さくする脱落防止部を形
成したことを特徴とする点火コイルの高圧端子側接続装
置。1. A high-voltage terminal, to which a high voltage of an ignition coil is applied, connected to an ignition plug via a conductive spring, wherein a press-fit portion for press-fitting the high-voltage terminal from above and a space for accommodating the spring. A high-pressure tower section made of resin molded with a large-diameter section having a large diameter formed on the upper side of the spring, and the high-pressure tower section is provided with a large-diameter section in the storage space for the spring. A high-voltage terminal-side connection device for an ignition coil, wherein a falling-off preventing portion for forming a minimum inner diameter of a lower portion smaller than an outer diameter of the large-diameter portion is formed.
高圧端子の圧入量を規制するストッパを兼ねるように形
成されていることを特徴とする請求項１に記載の点火コ
イルの高圧端子側接続装置。2. The high-voltage terminal of an ignition coil according to claim 1, wherein the falling-off preventing portion is formed so as to also serve as a stopper for regulating an amount of the high-voltage terminal pressed into the press-fitting portion. Side connection device.
から下方に延びるガイドリブを前記スプリングとの間の
隙間が下方側ほど大きくなるように形成したことを特徴
とする請求項１又は２に記載の点火コイルの高圧端子側
接続装置。3. The high-pressure tower section according to claim 1, wherein a guide rib extending downward from the falling-off preventing section is formed such that a gap between the spring and the spring increases toward a lower side. A high-voltage terminal-side connection device for the ignition coil according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10562497A JP3844094B2 (en) | 1997-04-23 | 1997-04-23 | Ignition coil high voltage terminal side connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10562497A JP3844094B2 (en) | 1997-04-23 | 1997-04-23 | Ignition coil high voltage terminal side connection device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006121986A Division JP4270223B2 (en) | 2006-04-26 | 2006-04-26 | How to connect ignition coil to high voltage terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10303045A true JPH10303045A (en) | 1998-11-13 |
| JP3844094B2 JP3844094B2 (en) | 2006-11-08 |
Family
ID=14412652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10562497A Expired - Lifetime JP3844094B2 (en) | 1997-04-23 | 1997-04-23 | Ignition coil high voltage terminal side connection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3844094B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192873B1 (en) | 1998-10-22 | 2001-02-27 | Denso Corporation | Ignition coil having spring for connecting the same to spark plug |
| ES2223248A1 (en) * | 2001-11-26 | 2005-02-16 | Denso Corporation | Ignition coil for internal combustion engine |
| CN100353469C (en) * | 2004-07-27 | 2007-12-05 | 株式会社电装 | Stick ignition coil apparatus for ignition plug |
| JP2008107907A (en) * | 2006-10-23 | 2008-05-08 | Riken Keiki Co Ltd | Gas alarm |
| JP2013217367A (en) * | 2012-03-12 | 2013-10-24 | Ngk Spark Plug Co Ltd | Plug connection tool |
-
1997
- 1997-04-23 JP JP10562497A patent/JP3844094B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192873B1 (en) | 1998-10-22 | 2001-02-27 | Denso Corporation | Ignition coil having spring for connecting the same to spark plug |
| ES2223248A1 (en) * | 2001-11-26 | 2005-02-16 | Denso Corporation | Ignition coil for internal combustion engine |
| CN100353469C (en) * | 2004-07-27 | 2007-12-05 | 株式会社电装 | Stick ignition coil apparatus for ignition plug |
| JP2008107907A (en) * | 2006-10-23 | 2008-05-08 | Riken Keiki Co Ltd | Gas alarm |
| JP2013217367A (en) * | 2012-03-12 | 2013-10-24 | Ngk Spark Plug Co Ltd | Plug connection tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3844094B2 (en) | 2006-11-08 |
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