JPS63116414A - Ignition coil for internal combustion engine - Google Patents
Ignition coil for internal combustion engineInfo
- Publication number
- JPS63116414A JPS63116414A JP61263255A JP26325586A JPS63116414A JP S63116414 A JPS63116414 A JP S63116414A JP 61263255 A JP61263255 A JP 61263255A JP 26325586 A JP26325586 A JP 26325586A JP S63116414 A JPS63116414 A JP S63116414A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- ignition
- head terminal
- coil spring
- spring
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- 230000006835 compression Effects 0.000 claims abstract description 36
- 238000007906 compression Methods 0.000 claims abstract description 36
- 238000004804 winding Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 abstract description 5
- 230000010363 phase shift Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野１
本発明は、内燃機関（エンジン〉の点火栓に装着され、
点火栓に直接高電圧を供給する点火コイルに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention is directed to a spark plug of an internal combustion engine,
It relates to an ignition coil that supplies high voltage directly to the ignition plug.
［従来の技術］
エンジンは運転時に振動を生じる。このエンジンの振動
は、エンジンに強固に締結された点火栓に伝達され、点
火栓に装着される点火コイルも点火栓の振動を受けて振
動する。[Prior Art] Engines generate vibrations during operation. This engine vibration is transmitted to the ignition plug that is firmly connected to the engine, and the ignition coil attached to the ignition plug also vibrates due to the vibration of the ignition plug.
ここで、例えば、点火コイルを点火栓に強固に装着する
と、質ｍの大きい点火コイルの振動がプラグキャップ装
着部分の点火栓に集中して加わるため、応力の集中によ
り点火栓が破損する可能性がある。For example, if the ignition coil is firmly attached to the ignition plug, the vibrations of the ignition coil, which has a large quality, will be concentrated and applied to the ignition plug where the plug cap is attached, which may cause the ignition plug to break due to stress concentration. There is.
このため、従来の点火コイルは、点火栓に応力集中が加
わらないようにゴム製のブツシュなどの弾性体を介して
点火栓に装着される。For this reason, conventional ignition coils are attached to the ignition plug via an elastic body such as a rubber bushing so as not to apply stress concentration to the ignition plug.
点火コイルは、弾性体を介して点火栓に装着されるため
、点火栓の振動と点火コイルとの振動とは位相のずれを
生ずる。Since the ignition coil is attached to the ignition plug via an elastic body, the vibrations of the ignition plug and the vibrations of the ignition coil are out of phase.
点火コイルと点火栓との間に位相のずれが発生しても点
火栓の頭部端子と、点火コイルの２次コイルに接続され
た接続端子とを電気的に常に接続する必要がある。Even if a phase shift occurs between the ignition coil and the ignition plug, it is necessary to always electrically connect the head terminal of the ignition plug to the connection terminal connected to the secondary coil of the ignition coil.
第５図に従来の点火栓と点火コイルとの接続部分の断面
図を示す。FIG. 5 shows a cross-sectional view of a connection portion between a conventional ignition plug and an ignition coil.
この点火コイルの接ＦＵＲ子１は、自由端が点火栓２の
頭部端子３の径より狭くなるように曲折して設けられた
金属性の板ばね４と、２次コイルの一端に接続されると
ともに、根ばね４と電気的および機械的に接続されるタ
ーミナル５とを備えたもので、点火栓２とプラグキャッ
プとの径方向の位相のずれを、板ばね４の自由端の弾性
変形で吸収る。The contact FUR element 1 of this ignition coil is connected to a metal plate spring 4 bent so that its free end is narrower than the diameter of the head terminal 3 of the ignition plug 2, and to one end of the secondary coil. The terminal 5 is electrically and mechanically connected to the root spring 4, and the radial phase shift between the spark plug 2 and the plug cap is corrected by elastic deformation of the free end of the leaf spring 4. Absorb with.
しかしながら、この構造では、頭部端子３の径方向の位
相のずれは吸収できるが、軸方向の位相のずれを吸収で
きない。このため、軸方向に位相のずれが発生すると、
頭部端子３と板ばね４との接触部分が互いに摩耗し、接
触不良を発生する可能性があった。However, although this structure can absorb the phase shift in the radial direction of the head terminal 3, it cannot absorb the phase shift in the axial direction. Therefore, when a phase shift occurs in the axial direction,
There was a possibility that the contact portions between the head terminal 3 and the leaf spring 4 would wear out against each other, resulting in poor contact.
そして、この問題点を解決するべく、頭部端子３の軸方
向の位相のずれを吸収するよう、第６図に示すように、
板ばね４とターミナル５の底部との間に、板ばね４を軸
方向に弾性支持可能な補助板ばね６を設けたしのが考案
されている。In order to solve this problem, in order to absorb the phase shift in the axial direction of the head terminal 3, as shown in FIG.
An auxiliary leaf spring 6 is provided between the leaf spring 4 and the bottom of the terminal 5, which can elastically support the leaf spring 4 in the axial direction.
［発明が解決しようとする問題点］
しかるにこの考案の構造は、補助板ばね６が狭いターミ
ナル５内に配されるため、形状が小さくなり、頭部端子
３の軸方向の振動の緩和を行なうに必要な弾性力を得に
くい問題点を備えるとともに、構造が複雑となるため製
造コストが高くなる問題点を有していた。[Problems to be Solved by the Invention] However, in the structure of this invention, since the auxiliary leaf spring 6 is disposed within the narrow terminal 5, the shape is small, and vibrations in the axial direction of the head terminal 3 are alleviated. In addition to having the problem that it is difficult to obtain the necessary elastic force, the structure is complicated and the manufacturing cost is high.
本発明は、上記事情に鑑みてなされたもので、その目的
は、点火栓と点火コイルとの間に径方向、および軸方向
に位相のずれが発生しても接続端子と頭部端子とを確実
に接続することができるとともに、製造コストを低く押
さえることのできる内燃機関用点火コイルの提供にある
。The present invention has been made in view of the above circumstances, and its purpose is to maintain the connection terminal and head terminal even if a phase shift occurs in the radial direction and axial direction between the ignition plug and the ignition coil. An object of the present invention is to provide an ignition coil for an internal combustion engine that can be connected reliably and can keep manufacturing costs low.
［問題点を解決するための手段］
本発明は上記目的を達成するために、点火栓に直接装着
される内燃機関用点火コイルにおいて、前記前記点火栓
の頭部端子と接続する接続端子に、前記頭部端子の径よ
り小さく設けられた内径で、前記頭部端子を保持する導
電性のコイルスプリングを設けたことを技術的手段とす
る。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an ignition coil for an internal combustion engine that is directly attached to a spark plug, in which a connection terminal connected to a head terminal of the spark plug, The technical means is to provide a conductive coil spring that holds the head terminal and has an inner diameter smaller than the diameter of the head terminal.
［作用〕
上記構成よりなる本発明は、点火コイルをを点火栓に接
続する際、頭部端子の径より小径なコイルスプリングの
内部に頭部端子を挿入する。この時、頭部端子にコイル
スプリングが付勢され、圧縮される。コイルスプリング
が圧縮されると、その内径はわずか広がる方向に働くと
ともに、コイルスプリングの小径な部分が、頭部端子に
拡張されて広がる方向に弾性変形するため、コイルスプ
リングの小径な部分の内部に頭部端子が容易に挿入され
る。[Operation] According to the present invention having the above configuration, when connecting the ignition coil to the ignition plug, the head terminal is inserted into the inside of the coil spring whose diameter is smaller than the diameter of the head terminal. At this time, a coil spring is applied to the head terminal and compressed. When the coil spring is compressed, its inner diameter acts in the direction of expanding slightly, and the small diameter part of the coil spring is elastically deformed in the direction of expanding and expanding to the head terminal, so that the inside diameter of the coil spring is expanded. Head terminals are easily inserted.
コイルスプリングの小径な部分に頭部端子が挿入される
と、頭部端子が挿入されている部分のコイルスプリング
が巻径が小さくなる方向に働くとともに、コイルスプリ
ングが引張られる方向に頭部端子が引張られると、コイ
ルスプリングの巻径が狭くなる方向に働くため、コイル
スプリングの小径な部分より頭部端子が抜けにくくなる
。When the head terminal is inserted into the small diameter part of the coil spring, the coil spring in the part where the head terminal is inserted works in the direction of decreasing the winding diameter, and the head terminal works in the direction where the coil spring is pulled. When it is pulled, the winding diameter of the coil spring becomes narrower, making it more difficult for the head terminal to come off than the smaller diameter portion of the coil spring.
コイルスプリング内に保持された頭部端子が、頭部端子
の径方向に移動すると、コイルスプリングの巻径が軸力
向にずれる。これにより、頭部端子が径方向に移動して
も頭部端子と２次コイルとの電気的接続が保たれる。When the head terminal held within the coil spring moves in the radial direction of the head terminal, the winding diameter of the coil spring shifts in the direction of the axial force. Thereby, even if the head terminal moves in the radial direction, the electrical connection between the head terminal and the secondary coil is maintained.
コイルスプリング内に保持された頭部端子が、頭部端子
の軸方向に移動すると、コイルスプリングが圧縮または
引張る方向に弾性変形する。これにより、頭部端子が軸
方向に移動しても頭部端子と２次コイルとの電気的接続
が保たれる。When the head terminal held within the coil spring moves in the axial direction of the head terminal, the coil spring is elastically deformed in the direction of compression or tension. Thereby, even if the head terminal moves in the axial direction, the electrical connection between the head terminal and the secondary coil is maintained.
［発明の効果］
本発明によれば、エンジンに装着される点火栓と、その
点火栓に装着される点火コイルとが異なった位相で振動
しても、その軸方向および径方向の位相のずれをコイル
スプリングが確実に吸収するため、点火コイルと頭部端
子とを常に接続することができる。[Effects of the Invention] According to the present invention, even if the spark plug attached to the engine and the ignition coil attached to the spark plug vibrate in different phases, the phase shift in the axial and radial directions can be prevented. Since the coil spring reliably absorbs the ignition coil and head terminal, the ignition coil and head terminal can always be connected.
また、構造が筒車なため、製造コスＹ・を低く押さえる
ことができる。Furthermore, since the structure is an hour wheel, manufacturing costs can be kept low.
［実施例］
次に、本発明の内燃（層間用点火コイルを図面に丞す一
実施例に基づき説明する。[Example] Next, an explanation will be given based on an example in which an internal combustion (interlayer ignition coil) of the present invention is shown in the drawings.
第１図は２輪車用２サイクルガソリンエンジンの要部を
示し、第２図は点火栓と点火コイルとの接続部分の拡大
図を示す。FIG. 1 shows the main parts of a two-stroke gasoline engine for a two-wheeled vehicle, and FIG. 2 shows an enlarged view of the connecting part between the ignition plug and the ignition coil.
２輪車用の２ザイクルガソリンエンジン（以下エンジン
）１００のシリンダーヘッド１１０には、燃焼空１２０
内で火花放電を発生する点火栓２００が装着されている
。そして、点火栓２００の頭部端子２１０は、外周に螺
子山が形成された棒状を呈している。A cylinder head 110 of a two-cycle gasoline engine (hereinafter referred to as engine) 100 for two-wheeled vehicles contains a combustion air 120.
A spark plug 200 that generates a spark discharge inside is installed. The head terminal 210 of the spark plug 200 has a rod shape with a thread formed on the outer periphery.
この点火栓２００には、頭部端子°２１０に高電圧を直
接供給する点火コイル３００が装着されている。The ignition plug 200 is equipped with an ignition coil 300 that directly supplies a high voltage to the head terminal 210.
点火コイル３００は、電磁鉄心３１１と、この電磁鉄心
３１１の外周に捲回された１次コイル３１２と、この１
次コイル３１２の外周に捲回された２次コイル３１３と
樹脂ケース３１４内に収納し、このケース３１４内に注
型樹脂を注入硬化してなるもので、ブツシュ３３０を介
して点火栓２００に装着される。The ignition coil 300 includes an electromagnetic core 311, a primary coil 312 wound around the outer periphery of the electromagnetic core 311, and a primary coil 312 wound around the outer circumference of the electromagnetic core 311.
A secondary coil 313 wound around the outer circumference of the secondary coil 312 is housed in a resin case 314, and a casting resin is injected and hardened into the case 314, and is attached to the ignition plug 200 via a bushing 330. be done.
接続端子３２０は、中央部がくびれ！二つづみ状の圧縮
コイルスプリング３２１と、この圧縮コイルスプリング
３２１を保持する金属製のターミナル３２２とからなり
、ケース３１４より膨出して形成された筒状の端子箱３
２３内に収納されている。The connection terminal 320 has a constriction in the center! A cylindrical terminal box 3 is formed by protruding from the case 314 and is made up of a two-piece compression coil spring 321 and a metal terminal 322 that holds the compression coil spring 321.
It is housed in 23.
圧縮コイルスプリング３２１は金属製で、中間部分の小
径部は、頭部端子２１０が接続され、その内径寸法は、
頭部端子２１０の径よりやや小径に設けられている。ま
た圧縮コイルスプリング３２１の両端の巻径は、頭部端
子２１０の径より大径に形成されている。ターミナル３
２２の内部に配される側の端部はターミナル３２２の内
径よりやや大径に形成されてターミナル３２２内に圧入
される。一方、開口側端部は、点火栓２００に点火コイ
ル３００が装着された際に点火栓２００の絶縁体２２０
の端部と当接するよう他端よりやや小径に設けられてい
る。なお、圧縮コイルスプリング３２１の自然長は、頭
部端子２１０の軸長よりやや長く設けられている。The compression coil spring 321 is made of metal, and the small diameter part in the middle part is connected to the head terminal 210, and its inner diameter is as follows.
It is provided with a slightly smaller diameter than the diameter of the head terminal 210. Further, the winding diameter at both ends of the compression coil spring 321 is formed to be larger than the diameter of the head terminal 210. terminal 3
The inner end of the terminal 22 is formed to have a slightly larger diameter than the inner diameter of the terminal 322, and is press-fitted into the terminal 322. On the other hand, when the ignition coil 300 is attached to the ignition plug 200, the opening side end is connected to the insulator 220 of the ignition plug 200.
It is provided with a slightly smaller diameter than the other end so that it comes into contact with the end of the other end. Note that the natural length of the compression coil spring 321 is set slightly longer than the axial length of the head terminal 210.
ターミナル３２２は、一方が間口した円筒形状を呈し、
内部に収納した圧縮コイルスプリング３２１と常に電気
的に接続されるとともに、点火コイル３００の２次コイ
ル３１３と高電圧供給配線３４０を介して接続されてい
る。The terminal 322 has a cylindrical shape with one end opened,
It is always electrically connected to the compression coil spring 321 housed inside, and is also connected to the secondary coil 313 of the ignition coil 300 via the high voltage supply wiring 340.
ブツシュ３３０は、耐熱性で且つ弾力性を備えた筒状の
樹脂製で、点火栓２００の取付金具２３０を外嵌する取
付金具装着部３３１、絶縁体２２０の外周に外嵌される
絶縁体装着部３３２、端子箱３２３を外嵌する端子箱装
着部３３３からなる。そして、取付金具装着部３３１の
内周端部には、取付金具２３０のボルト部２３１に係止
される係止部３３１ａを備える。また、端子箱装着部３
３３の内周には、端子箱３２３の外周に形成された鍔３
２３ａと嵌め合わされる溝３３３８が形成されている。The bushing 330 is made of a heat-resistant and elastic cylindrical resin, and includes a mounting bracket mounting portion 331 into which the mounting bracket 230 of the spark plug 200 is fitted, and an insulator mounting portion which is fitted around the outer periphery of the insulator 220. 332 and a terminal box mounting part 333 into which the terminal box 323 is fitted. The inner peripheral end of the mounting bracket mounting portion 331 is provided with a locking portion 331a that is locked to the bolt portion 231 of the mounting bracket 230. In addition, the terminal box mounting part 3
33 has a flange 3 formed on the outer periphery of the terminal box 323.
A groove 3338 is formed to fit into the groove 23a.
次に、上記実施例の点火コイル３００を点火栓２００に
取付る際の説明をする。Next, a description will be given of how to attach the ignition coil 300 of the above embodiment to the ignition plug 200.
点火栓２００の絶縁体２２０および取付金具２３０にブ
ツシュ３３０を外嵌し、ブツシュ３３０の係止部３３１
ａを取付金具２３０のボルト部２３１に係止する。The bushing 330 is externally fitted onto the insulator 220 and the mounting bracket 230 of the spark plug 200, and the locking portion 331 of the bushing 330 is
a to the bolt portion 231 of the mounting fitting 230.
この時、圧縮コイルスプリング３２１０間口側の内径が
裾広がりの形状のため、頭部端子２１０が圧縮コイルス
プリング３２１の小径部分の内部に案内される。そして
、頭部端子２１０の先端が圧縮コイルスプリング３２１
の小径部分の内径に当接づると、圧縮コイルスプリング
３２１が頭部端子２１０に圧縮される。圧縮コイルスプ
リング３２１が圧縮されるとその内径が僅か広がるとと
もに、小径部分が頭部端子２４０に拡張されて広がる方
向に弾性変形する。これにより、圧縮コイルスプリング
３２１の小径部分の内径に頭部端子２１０の外周が挿入
されろ。At this time, the head terminal 210 is guided inside the small diameter portion of the compression coil spring 321 because the inner diameter on the front side of the compression coil spring 3210 has a widening shape. The tip of the head terminal 210 is connected to a compression coil spring 321.
When the compression coil spring 321 comes into contact with the inner diameter of the small diameter portion of the head terminal 210, the compression coil spring 321 is compressed against the head terminal 210. When the compression coil spring 321 is compressed, its inner diameter expands slightly, and the small diameter portion expands into the head terminal 240 and is elastically deformed in the expanding direction. As a result, the outer periphery of the head terminal 210 is inserted into the inner diameter of the small diameter portion of the compression coil spring 321.
圧縮コイルスプリング３２１の小径部分の内径に挿入さ
れた頭部端子２１０は、圧縮コイルスプリング３２１の
小径部分が径の小さくなる方向に動くとともに、頭部端
子２１０が圧縮コイルス／リング３２１より扱ける方向
に移動すると圧縮コイルスプリング３２１が引張られ、
圧縮コイルスプリング３２１０巻径が狭くなる方向に動
くため、圧縮コイルスプリング３２１の小径部分ｔこ頭
部端子２１０が強く保持さ札る。The head terminal 210 inserted into the inner diameter of the small diameter portion of the compression coil spring 321 moves in a direction in which the small diameter portion of the compression coil spring 321 becomes smaller in diameter, and in a direction in which the head terminal 210 can be handled by the compression coil ring 321. When moving to , the compression coil spring 321 is pulled,
Since the coil diameter of the compression coil spring 3210 moves in the direction of narrowing, the small diameter portion of the compression coil spring 321 strongly holds the head terminal 210.
エンジン１００が運転されると、点火時期に点火コイル
３０００１次コイル３１２に電圧が供給さ礼、２次コイ
ル３１３に高電圧が発生する。２次コイル３１３で発生
した高電圧は、高電圧供給配線３４０、ターミナル３２
２、圧縮コイルスプリング３２１を介して点火栓２００
の頭部端子２１０に印加され、点火栓２００がエンジン
１００の燃焼室１２０内で火花放電を発生する。When the engine 100 is operated, voltage is supplied to the primary coil 312 of the ignition coil 3000 at the ignition timing, and a high voltage is generated in the secondary coil 313. The high voltage generated in the secondary coil 313 is transferred to the high voltage supply wiring 340 and the terminal 32.
2. Ignition plug 200 via compression coil spring 321
is applied to head terminal 210 of engine 100, causing spark plug 200 to generate a spark discharge within combustion chamber 120 of engine 100.
エンジン１００の運転時は、燃焼エネルギー、車両走行
時に生じる振動等によりエンジン１００が振動する。こ
のエンジン１００の振動は、点火栓２００を介して点火
コイル３００に伝達される。When the engine 100 is in operation, the engine 100 vibrates due to combustion energy, vibrations generated when the vehicle is running, and the like. This vibration of engine 100 is transmitted to ignition coil 300 via ignition plug 200.
点火栓２００は、エンジン１００より突出する長さおよ
び重量が小さいとともにエンジン１００に強く締結され
るため、エンジン１００と同じ位相で撮動する。一方、
点火コイル３００は、弾性部材であるブツシュ３３０を
介して点火栓２００に装着されるとともに、点火コイル
３００の長さ、重量などにより、エンジン１００と異な
った位相で振動する。The spark plug 200 has a small length and weight that protrudes from the engine 100, and is strongly fastened to the engine 100, so it is photographed in the same phase as the engine 100. on the other hand,
The ignition coil 300 is attached to the ignition plug 200 via a bush 330, which is an elastic member, and vibrates at a different phase from the engine 100 depending on the length, weight, etc. of the ignition coil 300.
点火栓２００と点火コイル３００どの位相のずれは、弾
性部材であるブツシュ３３０と圧縮コイルスプリング３
２１で吸収緩和される。The difference in phase between the ignition plug 200 and the ignition coil 300 is due to the difference between the elastic member bush 330 and the compression coil spring 3.
Absorption is relaxed at 21.
次に、頭部端子２１０と点火コイル３００どの位相のず
れを吸収する圧縮フィルスプリング３２１の作動を説明
する。Next, the operation of the compression fill spring 321 that absorbs the phase shift between the head terminal 210 and the ignition coil 300 will be explained.
点火栓２００の径方向に位相のずれが発生すると、圧縮
コイルスプリング３２１の小径部分の巻径が径方向にず
れることにより径方向の位相のずれを吸収する。When a phase shift occurs in the radial direction of the spark plug 200, the winding diameter of the small diameter portion of the compression coil spring 321 shifts in the radial direction, thereby absorbing the radial phase shift.
点火栓２００の軸方向に位相のずれが発生すると、圧縮
コイルスプリング３２１が圧縮または引張られる方向に
弾性変形して軸方向の位相のずれを吸収する。When a phase shift occurs in the axial direction of the spark plug 200, the compression coil spring 321 is elastically deformed in the direction of compression or tension to absorb the axial phase shift.
これにより、エンジン１００が振動しても、圧縮コイル
スプリング３２１が常に点火栓２００の頭部端子２１０
を摺動することなく保持するため、頭部端子２１０と２
次コイルが常に電気的に接続される。As a result, even if the engine 100 vibrates, the compression coil spring 321 is always connected to the head terminal 210 of the spark plug 200.
In order to hold the head terminals 210 and 2 without sliding,
The next coil is always electrically connected.
第３図に本発明の第２実施例を示す。FIG. 3 shows a second embodiment of the present invention.
本実施例は、端子箱３２３の内周３２３ｂでターミナル
３２２を介すことなく圧縮コイルスプリング３２１の外
周を保持するもので、ターミナル３２２は筒状から皿形
状に変更されている。In this embodiment, the outer periphery of the compression coil spring 321 is held on the inner periphery 323b of the terminal box 323 without intervening the terminal 322, and the terminal 322 is changed from a cylindrical shape to a dish shape.
第４図に本発明の第３実施例を示す。FIG. 4 shows a third embodiment of the present invention.
本実施例は、圧縮コイルスプリング３２１の一端をケー
ス３１４でモールド固定し、圧縮コイルスプリング３２
１の一端に高電圧供給配線３４０を直接接続したもので
ある。In this embodiment, one end of the compression coil spring 321 is molded and fixed in the case 314, and the compression coil spring 321 is molded and fixed.
A high-voltage supply wiring 340 is directly connected to one end of 1.
（変形例）
圧縮コイルスプリングの中央がくびれたつづみ状に形成
した例を示したが、他に、圧縮コイルスプリングの一端
を頭部端子の径よりやや小径に設け、他端を頭部端子の
径より大径に設けたテーパー形状や、渦巻ばね、圧縮コ
イルスプリングの径全体を頭部端子の径よりやや小径に
設けるなど、他の形状に形成しても良い。(Modified example) Although the example in which the compression coil spring is formed into a constricted ring shape at the center is shown, it is also possible to provide one end of the compression coil spring with a diameter slightly smaller than the diameter of the head terminal, and the other end to form the head terminal. It may be formed into other shapes, such as a tapered shape with a diameter larger than the diameter of the head terminal, or a spiral spring or a compression coil spring with a diameter slightly smaller than the diameter of the head terminal.
２輪重用の２サイクルガソリンエンジンの点火栓に本発
明を適用したが、自動車用、船舶用、スノーモービル用
、発電芸用、汎用エンジンなど、他の２サイクルエンジ
ン、４ナイクルエンジン、ロータリーエンジンなど全て
の火花点大機関の点火栓に適用することができる。Although the present invention was applied to the spark plug of a 2-stroke gasoline engine for two-wheel heavy duty, it can also be applied to other 2-cycle engines, 4-cycle engines, rotary engines, etc. for automobiles, ships, snowmobiles, power generators, general-purpose engines, etc. It can be applied to the spark plugs of all engines with large spark points.
第１図は本発明の第１実施例を適用した２サイクルガソ
リンエンジンの要部の断面図、第２図は点火栓と点火コ
イルとの接続部分の拡大図、第３図は本発明の第２実施
例を示す断面図、第４図は本発明の第３実施例を示す断
面図、第５図および第６図は従来の点火栓と点火コイル
との接続部分の断面図である。
図中 ２００・・・点火栓 ２１０・・・頭部端子
３００・・・点火コイル ３２０・・・接続端子 ３２
１・・・圧縮コイルスプリングFIG. 1 is a cross-sectional view of the main parts of a two-stroke gasoline engine to which the first embodiment of the present invention is applied, FIG. 2 is an enlarged view of the connecting portion between the spark plug and the ignition coil, and FIG. FIG. 4 is a cross-sectional view showing a third embodiment of the present invention, and FIGS. 5 and 6 are cross-sectional views of a connecting portion between a conventional ignition plug and an ignition coil. In the diagram 200...Spark plug 210...Head terminal
300... Ignition coil 320... Connection terminal 32
1... Compression coil spring
Claims (1)
いて、 前記点火栓の頭部端子とを接続する接続端子に、前記頭
部端子の径より小さく設けられた内径で前記頭部端子を
保持する導電性のコイルスプリングを設けたことを特徴
とする内燃機関用点火コイル。 ２）前記コイルスプリングは、中間部が最小巻径で、両
端が中間位置より大巻径に設けられたつづみ型の圧縮コ
イルスプリングであることを特徴とする特許請求の範囲
第１項に記載の内燃機関用点火コイル。[Claims] 1) In an ignition coil for an internal combustion engine that is directly attached to an ignition plug, a connection terminal that connects to a head terminal of the ignition plug has an inner diameter smaller than the diameter of the head terminal. An ignition coil for an internal combustion engine, comprising an electrically conductive coil spring that holds the head terminal. 2) According to claim 1, the coil spring is a clutch-type compression coil spring with a minimum winding diameter at the middle portion and a larger winding diameter at both ends. Ignition coil for internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263255A JPH07111929B2 (en) | 1986-11-05 | 1986-11-05 | Ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61263255A JPH07111929B2 (en) | 1986-11-05 | 1986-11-05 | Ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63116414A true JPS63116414A (en) | 1988-05-20 |
| JPH07111929B2 JPH07111929B2 (en) | 1995-11-29 |
Family
ID=17386929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61263255A Expired - Lifetime JPH07111929B2 (en) | 1986-11-05 | 1986-11-05 | Ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07111929B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458509A (en) * | 1993-10-04 | 1995-10-17 | Mitsubishi Denki Kabushiki Kaisha | Ignition coil device for internal combustion engine |
| JP2009182137A (en) * | 2008-01-30 | 2009-08-13 | Denso Corp | Manufacturing method of ignition coil |
| US10291000B2 (en) | 2015-07-13 | 2019-05-14 | Denso Corporation | Ignition apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6176166U (en) * | 1984-10-24 | 1986-05-22 |
-
1986
- 1986-11-05 JP JP61263255A patent/JPH07111929B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6176166U (en) * | 1984-10-24 | 1986-05-22 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458509A (en) * | 1993-10-04 | 1995-10-17 | Mitsubishi Denki Kabushiki Kaisha | Ignition coil device for internal combustion engine |
| JP2009182137A (en) * | 2008-01-30 | 2009-08-13 | Denso Corp | Manufacturing method of ignition coil |
| US10291000B2 (en) | 2015-07-13 | 2019-05-14 | Denso Corporation | Ignition apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07111929B2 (en) | 1995-11-29 |
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