JPH0552436B2 - - Google Patents
Info
- Publication number
- JPH0552436B2 JPH0552436B2 JP63172621A JP17262188A JPH0552436B2 JP H0552436 B2 JPH0552436 B2 JP H0552436B2 JP 63172621 A JP63172621 A JP 63172621A JP 17262188 A JP17262188 A JP 17262188A JP H0552436 B2 JPH0552436 B2 JP H0552436B2
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- coil
- terminal
- voltage diode
- secondary coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
この発明は自動車のエンジン等内燃機関を点火
駆動する点火コイルに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an ignition coil for igniting an internal combustion engine such as an automobile engine.
＜従来の技術＞
特開昭62−48966号公報により、１次コイルを
２次コイルの内周に同心状に嵌合して絶縁ケース
に収容し、該絶縁ケース中に注型した絶縁樹脂層
で上記両コイルをケース内に埋設固定すると共
に、前記２次コイルの高圧端と高圧端子を高圧ダ
イオードを介して接続した内燃機関用点火コイル
は公知である。<Prior art> According to Japanese Patent Application Laid-Open No. 62-48966, a primary coil is fitted concentrically to the inner periphery of a secondary coil and housed in an insulating case, and an insulating resin layer is cast into the insulating case. An ignition coil for an internal combustion engine is known in which both of the coils are buried and fixed in a case, and the high voltage end of the secondary coil and the high voltage terminal are connected via a high voltage diode.
＜発明が解決しようとする課題＞
２次コイルの高圧端と高圧端子の間の高圧ダイ
オードは、機関の回転に同期して開閉するスイツ
チング手段の閉成時、２次コイルに過渡的に発生
する高電圧が点火プラグに印加されるのを阻止す
るためのものであるが、上記従来例では高圧ダイ
オードをケース内に注型した絶縁樹脂層中に埋め
殺している。<Problems to be Solved by the Invention> The high voltage diode between the high voltage end of the secondary coil and the high voltage terminal causes a transient voltage to be generated in the secondary coil when the switching means that opens and closes in synchronization with the rotation of the engine is closed. This is to prevent high voltage from being applied to the spark plug, but in the conventional example described above, the high voltage diode is buried in an insulating resin layer cast inside the case.
従つて、絶縁樹脂（熱硬化性エポキシ樹脂等）
と、高圧ダイオード（ガラス質等）との熱膨張係
数の差により高圧ダイオードに亀裂が入つて破損
することがある。又、高圧ダイオードと高圧端子
間のリード線の引き回しによる接続の作業性が悪
いと共に、絶縁距離が短く、絶縁性が悪い。更
に、高圧ダイオードの表面は絶縁樹脂に埋められ
るまでは露出しているので、異物が付着し易く、
異物が付着したまゝ絶縁樹脂中に埋まると界面剥
離を起し、沿面リークする。 Therefore, insulating resin (thermosetting epoxy resin, etc.)
Due to the difference in thermal expansion coefficient between the high-pressure diode and the high-pressure diode (glass, etc.), the high-pressure diode may crack and be damaged. Furthermore, the workability of connecting the high-voltage diode and the high-voltage terminal by routing the lead wire is poor, and the insulation distance is short, resulting in poor insulation properties. Furthermore, since the surface of the high-voltage diode is exposed until it is buried in the insulating resin, it is easy for foreign matter to adhere to it.
If foreign matter remains attached and remains embedded in the insulating resin, interfacial peeling will occur and creepage leakage will occur.
＜課題を解決するための手段＞
そこで本発明の点火コイルは、１次コイルを２
次コイルの内周に同心状に嵌合して絶縁ケースに
収容し、該絶縁ケース中に注型した絶縁樹脂層で
上記両コイルをケース内に埋設固定すると共に、
前記２次コイルの高圧端と高圧端子を高圧ダイオ
ードを介して接続した内燃機関用点火コイルにお
いて、前記２次コイルのボビンに前記高圧ダイオ
ードの収容筒を設け、該高圧ダイオードを上記収
容筒中に収容すると共に、該収容筒の先端には高
圧ダイオードのリード線を接続した中継端子を取
付け、この中継端子を高圧端子と電気的に接続し
たことを特徴とする。<Means for solving the problem> Therefore, the ignition coil of the present invention has a primary coil that is
Next, the coils are fitted concentrically to the inner periphery of the coil and housed in an insulating case, and both of the coils are embedded and fixed in the case with an insulating resin layer cast into the insulating case.
In an ignition coil for an internal combustion engine in which a high voltage end of the secondary coil and a high voltage terminal are connected via a high voltage diode, a housing tube for the high voltage diode is provided in the bobbin of the secondary coil, and the high voltage diode is housed in the housing tube. In addition, a relay terminal to which a lead wire of a high-voltage diode is connected is attached to the tip of the housing tube, and this relay terminal is electrically connected to the high-voltage terminal.
＜実施例＞
図示の実施例において、１は１次コイル、２は
１次コイルを内周に嵌合する分割巻きした２次コ
イル、３はプラスチツクで成形した筒形の絶縁ケ
ースを示す。<Embodiment> In the illustrated embodiment, 1 is a primary coil, 2 is a split-wound secondary coil that fits the primary coil on its inner periphery, and 3 is a cylindrical insulating case molded from plastic.
絶縁ケース３は１次、２次両コイルを収容する
大径筒部４と、該大径筒部の前端に連なつた小径
筒部５を備えている。２次コイルのプラスチツク
で成形したボビン６は、１次コイルが入る中空部
の前面を横切る架橋部７を前端に有し、の架橋部
からは高圧ダイオード８よりも内径が少し大きい
細い収容筒９が前向きに筒出する。収容筒９は後
端に高圧ダイオード８の後端から延びるリード線
８ａを外に引き出すための孔９′を有し、前記架
橋部７は２次コイルの巻線の巻終側を巻き付けて
保持する突起１０を備えている。 The insulating case 3 includes a large-diameter cylindrical portion 4 that accommodates both the primary and secondary coils, and a small-diameter cylindrical portion 5 connected to the front end of the large-diameter cylindrical portion. The bobbin 6 made of plastic for the secondary coil has a bridge section 7 at its front end that crosses the front surface of the hollow section into which the primary coil is placed, and from the bridge section comes a thin housing tube 9 whose inner diameter is slightly larger than that of the high-voltage diode 8. The tube protrudes forward. The housing cylinder 9 has a hole 9' at the rear end for drawing out the lead wire 8a extending from the rear end of the high voltage diode 8, and the bridging portion 7 wraps and holds the winding end of the secondary coil. It is provided with a protrusion 10 that
絶縁ケースの小径筒部５の内周は前記収容筒９
が緩く突入する後部５ａと、それよりも小内径で
高圧端子１１を収容する前部５ｂとからなり、そ
の境界は環状の段５′になつている。高圧端子１
１はカーボン材製で、その後端にはコイルバネ１
２の前端が巻き付いている。コイルバネの後端は
巻径が少し大きくなつていて、前述の段５′に当
接し、この状態で高圧端子１１の前端部は絶縁ケ
ースの小径筒部５の前端から外に突出する。 The inner periphery of the small diameter cylinder portion 5 of the insulating case is connected to the housing cylinder 9.
It consists of a rear part 5a into which the terminal 5a gently protrudes, and a front part 5b which has a smaller inner diameter and accommodates the high-voltage terminal 11, and the boundary thereof is an annular step 5'. High voltage terminal 1
1 is made of carbon material, and a coil spring 1 is attached to the rear end.
The front end of 2 is wrapped around. The rear end of the coil spring has a slightly larger winding diameter and comes into contact with the step 5', and in this state the front end of the high voltage terminal 11 projects outward from the front end of the small diameter cylindrical portion 5 of the insulating case.
点火コイルに組立てるには、高圧ダイオード８
を収容筒９に入れ、後端から延びるリード線８ａ
を孔９′から外に出し、突起１０に巻き付けた２
次コイルの巻線２′の巻終り側の端末をこれに接
続して半田付けすると共に、収容筒９の前端には
高圧ダイオードの前端から延びるリード線８ｂを
通す中心孔を有する中継端子１３を圧入し、該端
子の中心孔に通つたリード線８ｂを半田付けで固
定する。尚、この中継端子１３は絶縁ケースの小
径部内の段５′に当接する鍔１３′を備えている。 To assemble into the ignition coil, high voltage diode 8
into the housing tube 9, and the lead wire 8a extending from the rear end.
was taken out from the hole 9' and wrapped around the protrusion 10.
The end of the winding 2' of the next coil is connected and soldered thereto, and a relay terminal 13 is provided at the front end of the housing tube 9, which has a center hole through which the lead wire 8b extending from the front end of the high-voltage diode is passed. The lead wire 8b passed through the center hole of the terminal is press-fitted and fixed by soldering. The relay terminal 13 is provided with a flange 13' that abuts against a step 5' in the small diameter portion of the insulating case.
一方、絶縁ケース３内にはコイルバネ１２を従
えた高圧端子１１を後から入れて小径筒部５の内
周前部に位置させ、コイルバネの後端を段５′に
当接させる。 On the other hand, a high voltage terminal 11 with a coil spring 12 attached thereto is inserted into the insulating case 3 from behind and positioned at the front inner circumference of the small diameter cylindrical portion 5, so that the rear end of the coil spring is brought into contact with the step 5'.
それから２次コイル２を絶縁ケース３内に後か
ら入れ、そのボビンの前端から前向きに突出する
収容筒９を小径筒部５の内周後部５ａに突入して
中継端子１３の鍔１３′を前記コイルバネ１２の
後端を介して段５′に当接すると共に、２次コイ
ルのボビン６の内周には同心状に１次コイル１を
嵌合し、１次コイルのボビンの内周には積層した
Ｉ形鉄心１４を嵌め、必要ならば絶縁ケースの大
径筒部４の内周沿いに割れ目を有する筒状の外側
鉄心１５を嵌め、１次コイルの巻始め端を接続し
た１次端子と、１次コイルの巻終り端及び２次コ
イルの巻始め端を接続した１次端子の２本（図で
は１本のみを１６で示した。）をインサートモー
ルドで貫通状に取付けたプラスチツクの１次端子
ブロツク１７をケースの後端から一部外に突出す
るように位置決めしてケースの後部に収容し、真
空注型で絶縁樹脂、例えば熱硬化性エポキシ樹脂
を充填し、硬化させて絶縁樹脂層１８中に１次、
２次両コイル及び鉄心を固定する。 Then, the secondary coil 2 is inserted into the insulating case 3 from behind, and the housing tube 9 protruding forward from the front end of the bobbin is inserted into the inner circumferential rear portion 5a of the small diameter tube portion 5, and the collar 13' of the relay terminal 13 is The rear end of the coil spring 12 contacts the stage 5', and the primary coil 1 is fitted concentrically to the inner periphery of the bobbin 6 of the secondary coil. If necessary, fit the cylindrical outer core 15 having a crack along the inner periphery of the large diameter cylindrical portion 4 of the insulating case, and connect the primary terminal to which the winding start end of the primary coil is connected. , a plastic one in which two primary terminals (only one is shown as 16 in the figure), which connect the winding end of the primary coil and the winding start end of the secondary coil, are attached in a penetrating manner using an insert mold. The next terminal block 17 is positioned so that it partially protrudes from the rear end of the case, and is housed in the rear part of the case.Then, it is filled with an insulating resin, such as a thermosetting epoxy resin, by vacuum casting, and is cured to make the insulating resin. Primary in layer 18,
Fix both secondary coils and iron core.
注型した絶縁樹脂は、中継端子１３の鍔１３′
が段５′に当接して絶縁ケースの小径部の内周前
部５ｂを後から塞ぐため、該小径部の内周後部５
ａ及びケースの大径部４内を充すと共に、一部は
高圧ダイオード８のリード線８ａを引き出した孔
９′から入つて収容筒９内をも充たす。 The cast insulating resin is used as the flange 13' of the relay terminal 13.
comes into contact with the step 5' and closes the inner peripheral front part 5b of the small diameter part of the insulating case from behind, so that the inner peripheral rear part 5b of the small diameter part
a and the inside of the large diameter part 4 of the case, and a part of it enters through the hole 9' through which the lead wire 8a of the high voltage diode 8 is pulled out and also fills the inside of the housing cylinder 9.
こうして２次コイルの高圧端は高圧ダイオード
８、中継端子１３を経て高圧端子１１と電気的に
接続しているため、絶縁ケースの小径部５をエン
ジンの点火プラグ取付け孔に装着して高圧端子１
１を点火プラグの端子に当接し、エンジンの回転
に同期して開閉するスイツチング手段で１次端子
１６を介して１次コイルを断続し、２次コイルに
発生する高電圧で点火プラグに点火火花を飛ばす
ことができる。そして、高圧ダイオード８が２次
コイルの高圧端と高圧端子の間にあるためスイツ
チング手段の閉成時に２次コイルを過渡的に発生
する極性が逆の高電圧を点火プラグに印加するこ
とが防止できる。 In this way, the high voltage end of the secondary coil is electrically connected to the high voltage terminal 11 via the high voltage diode 8 and the relay terminal 13.
1 is brought into contact with the terminal of the spark plug, and a switching means that opens and closes in synchronization with the rotation of the engine connects and disconnects the primary coil via the primary terminal 16, and the high voltage generated in the secondary coil causes an ignition spark to be generated in the spark plug. can fly. Since the high-voltage diode 8 is located between the high-voltage end of the secondary coil and the high-voltage terminal, it is possible to prevent a high voltage of opposite polarity from being applied to the spark plug, which is generated transiently in the secondary coil when the switching means is closed. can.
＜発明の効果＞
本発明によれば高圧ダイオード８は収容筒９内
に入れてあるので、絶縁樹脂の注型までに高圧ダ
イオードに異物が付着せず、界面剥離による沿面
リークが防止できる。又、この収容筒内にも注型
によつて絶縁樹脂は入るが、その量は少量である
ため熱膨張係数の差により生じる影響は少ない。
従つて、高圧ダイオードに亀裂は生ぜず、信頼性
が高い。<Effects of the Invention> According to the present invention, since the high-voltage diode 8 is placed in the housing cylinder 9, foreign matter does not adhere to the high-voltage diode before the insulating resin is cast, and creepage leakage due to interfacial peeling can be prevented. Further, although insulating resin is introduced into the housing cylinder by casting, the amount thereof is small, so that the influence caused by the difference in thermal expansion coefficients is small.
Therefore, no cracks occur in the high voltage diode and its reliability is high.
そして、高圧ダイオードのリード線をつないだ
中継端子を収容筒の先端に取付け、この中継端子
を介して高圧ダイオードを高圧端子に接続するの
で、高圧ダイオードに直接に力が加わららず、
又、半田付け等の工程も不要になるため組立ての
作業性が良く、生産性の向上が計れる。 Then, a relay terminal to which the lead wire of the high voltage diode is connected is attached to the tip of the housing tube, and the high voltage diode is connected to the high voltage terminal via this relay terminal, so no force is applied directly to the high voltage diode.
Furthermore, since processes such as soldering are not required, assembly workability is improved and productivity can be improved.
第１図は本発明の点火コイルの一実施例の断面
図、第２図は第１図の−線での断面図、第３
図は２次コイルと高圧ダイオードの分解斜視図、
第４図は２次コイルと、絶縁ケースと、高圧端子
の分割斜視図である。
図中、１は１次コイル、２は２次コイル、３は
絶縁ケース、６は２次ボビン、８は高圧ダイオー
ド、９はその収容筒、１１は高圧端子、１３は中
継端子、１８は絶縁樹脂層を示す。
FIG. 1 is a cross-sectional view of one embodiment of the ignition coil of the present invention, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, and FIG.
The figure is an exploded perspective view of the secondary coil and high voltage diode.
FIG. 4 is a divided perspective view of the secondary coil, the insulating case, and the high voltage terminal. In the figure, 1 is the primary coil, 2 is the secondary coil, 3 is the insulating case, 6 is the secondary bobbin, 8 is the high voltage diode, 9 is the housing tube, 11 is the high voltage terminal, 13 is the relay terminal, and 18 is the insulation Shows the resin layer.
Claims (1)
合して絶縁ケースに収容し、該絶縁ケース中に注
型した絶縁樹脂層で上記両コイルをケース内に埋
設固定すると共に、前記２次コイルの高圧端と高
圧端子を高圧ダイオードを介して接続した内燃機
関用点火コイルにおいて、 前記２次コイルのボビンに前記高圧ダイオード
の収容筒を設け、該高圧ダイオードを上記収容筒
中に収容すると共に、 該収容筒の先端には高圧ダイオードのリード線
を接続した中継端子を取付け、この中継端子を高
圧端子と電気的に接続したことを特徴とする内燃
機関用点火コイル。[Claims] 1. The primary coil is fitted concentrically to the inner periphery of the secondary coil and housed in an insulating case, and both coils are enclosed within the case by an insulating resin layer cast into the insulating case. In an ignition coil for an internal combustion engine, which is buried and fixed and in which a high voltage end of the secondary coil and a high voltage terminal are connected via a high voltage diode, a housing cylinder for the high voltage diode is provided in the bobbin of the secondary coil, and the high voltage diode is connected to the high voltage terminal. An ignition coil for an internal combustion engine, which is housed in the housing tube, and has a relay terminal connected to a lead wire of a high-voltage diode attached to the tip of the housing tube, and the relay terminal is electrically connected to the high-voltage terminal. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63172621A JPH0223269A (en) | 1988-07-13 | 1988-07-13 | Ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63172621A JPH0223269A (en) | 1988-07-13 | 1988-07-13 | Ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0223269A JPH0223269A (en) | 1990-01-25 |
| JPH0552436B2 true JPH0552436B2 (en) | 1993-08-05 |
Family
ID=15945269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63172621A Granted JPH0223269A (en) | 1988-07-13 | 1988-07-13 | Ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223269A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3473817B2 (en) | 1996-10-18 | 2003-12-08 | 株式会社デンソー | Ignition coil for internal combustion engine |
| JP5703945B2 (en) * | 2011-05-07 | 2015-04-22 | 株式会社デンソー | Ignition coil and method of manufacturing ignition coil |
| JP6362375B2 (en) * | 2014-03-26 | 2018-07-25 | ダイヤモンド電機株式会社 | Ignition coil for internal combustion engines |
| JP2021046702A (en) * | 2019-09-18 | 2021-03-25 | 株式会社第一基礎 | Joint device, steel structural member, and application method of joint device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62139308A (en) * | 1985-12-13 | 1987-06-23 | Hitachi Ltd | Ignition coil for internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58100277U (en) * | 1981-12-28 | 1983-07-07 | 澤藤電機株式会社 | Ignition system for internal combustion engines |
-
1988
- 1988-07-13 JP JP63172621A patent/JPH0223269A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62139308A (en) * | 1985-12-13 | 1987-06-23 | Hitachi Ltd | Ignition coil for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0223269A (en) | 1990-01-25 |
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