JPH0215306Y2 - - Google Patents
Info
- Publication number
- JPH0215306Y2 JPH0215306Y2 JP11372284U JP11372284U JPH0215306Y2 JP H0215306 Y2 JPH0215306 Y2 JP H0215306Y2 JP 11372284 U JP11372284 U JP 11372284U JP 11372284 U JP11372284 U JP 11372284U JP H0215306 Y2 JPH0215306 Y2 JP H0215306Y2
- Authority
- JP
- Japan
- Prior art keywords
- core
- primary
- bobbin
- case
- primary bobbin
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 17
- 239000011347 resin Substances 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は内燃機関用点火コイルに関する。[Detailed explanation of the idea] [Industrial application field] The present invention relates to an ignition coil for an internal combustion engine.
従来の点火コイルとしては、コアの外周に配置
した１次、２次コイルを収納したケース内に、注
型樹脂を注入硬化することが一般的に行われてい
るが、コアと注型樹脂との線膨脹係数が大きく異
なるため、冷熱衝撃試験において、注型樹脂にク
ラツクが発生するという欠点があつた。
Conventional ignition coils are generally made by injecting and hardening casting resin into a case that houses the primary and secondary coils placed around the outer periphery of the core. Because the coefficients of linear expansion of the two materials differed greatly, there was a drawback that cracks occurred in the casting resin during the thermal shock test.
そこで従来、上記の欠点を解消するため、コア
の外周を１次ボビンなどで被つて、コアと注型樹
脂とが直接接触しないようにしたものも考えられ
ている（例えば実開昭58−87317号公報）が、冷
熱サイクルによりコアが１次ボビン等に対し相対
的に移動することは避けられないので、このコア
の相対的な移動によつてコアを被う１次ボビン等
の破損が生じるという欠点がある。 Conventionally, in order to eliminate the above-mentioned drawbacks, it has been considered to cover the outer periphery of the core with a primary bobbin to prevent direct contact between the core and the casting resin (for example, Utility Model No. 58-87317 However, since it is unavoidable that the core moves relative to the primary bobbin etc. due to the cooling/heating cycle, this relative movement of the core causes damage to the primary bobbin etc. that covers the core. There is a drawback.
そこで本考案は、冷熱サイクルによる注型樹脂
のクラツクの発生や、１次ボビン等の破損を確実
に防止するものである。
Therefore, the present invention reliably prevents the occurrence of cracks in the casting resin and damage to the primary bobbin, etc. due to cooling and heating cycles.
そのため本考案は、コアとこのコアの外周に配
置した１次、２次コイルとをケース内に収納し、
このケース内に注型樹脂を注入硬化してなる内燃
機関用点火コイルにおいて、内側に前記コアが挿
入されると共に外周に前記１次コイルを巻線した
１次ボビンを備え、この１次ボビンの端面に前記
注型樹脂より突出させて蓋部を設けると共に、こ
の蓋部に前記コアの外径より小さい貫通穴を形成
し、さらに、前記蓋部と前記コアの端面との間に
隙間を形成してなる内燃機関用点火コイルを提供
するものである。
Therefore, in the present invention, the core and the primary and secondary coils arranged around the core are housed in a case.
This ignition coil for an internal combustion engine is formed by injecting and hardening a casting resin into the case, and includes a primary bobbin in which the core is inserted and the primary coil is wound around the outer periphery of the primary bobbin. A lid is provided on the end surface to protrude from the casting resin, a through hole smaller than the outer diameter of the core is formed in the lid, and a gap is formed between the lid and the end surface of the core. An ignition coil for an internal combustion engine is provided.
これにより、１次ボビン内でコアが隙間分だけ
移動して、線膨脹係数の差を吸収することができ
る。
This allows the core to move within the primary bobbin by the amount of the gap, thereby absorbing the difference in linear expansion coefficients.
以下本考案を図に示す実施例について説明す
る。第１図において、１は合成樹脂製の筒状の１
次ボビンで、その先端には蓋部１ａが一体に設け
られていて、この蓋部１ａには小さな貫通穴１０
が形成してある。さらに、この蓋部１ａに隣接し
て１次ボビン１には大径部（ストツパ部）１ｂが
形成され、さらにこの大径部１ｂに隣接して１次
ボビン１の中間部外周には巻線用凹部１ｃが形成
されていて、この巻線用凹部１ｃに１次コイル２
が巻線されている。また、１次ボビン１の他端は
開口端となしてある。３は外周に複数の巻溝を形
成した合成樹脂製の２次ボビンで、１次ボビン１
の外周に配置されていて、外周の巻溝には２次コ
イル４が分割巻きされている。また、２次ボビン
３の一端には蓋部３ａが形成されていて、この蓋
部３ａの内底面中央には、１次ボビン１内に向か
つて軸方向に突出するコア位置決め用突起３ｂが
一体に形成され、さらに蓋部３ａの外側にはター
ミナル固定用突起３ｃが一体に形成されている。
５はターミナル固定用突起に固定した２次ターミ
ナルで、２次コイル４の高圧側端末が接続される
突起５ａと、高圧コードが接続されるねじ部５ｂ
とを有している。６は合成樹脂製のケースで、そ
の内部には点火コイル側と制御回路側とを区画す
る隔壁６ａが一体に形成されており、また、外側
壁には取付用ステー６ｂが一体に形成され、さら
に底壁にはケース６内と連通させて１次ターミナ
ル用コネクタ部６ｃと高圧コード用筒部６ｄとが
一体に形成されていて、２次ターミナル５のねじ
部５ｂが高圧コード用筒部６ｄ内に突出配置され
ている。７は真空引きしてケース６内に注入した
後硬化させた熱硬化性樹脂であり、１次ボビン１
の蓋部１ａはこの樹脂７中より外部に突出させて
ある。８は１次ボビン１の内径とほぼ同径（若干
小径の方がよい）で、かつ１次ボビン１の蓋部内
面から２次ボビン３のコア位置決め用突起３ｂ先
端までの寸法より１mm程度以上短い長さの円柱状
のコアであつて、１次ボビン１の内側に挿入され
ていて、このコア８の端面と１次ボビン１の蓋部
１ａとの間には１mm以上の隙間１１が形成されて
いる。また、２次ボビン３のコア位置決め用突起
３ｂがコア８の端面に当接して、コア８および１
次ボビン１が２次ボビン３に対して軸方向にずら
して位置決め配置されていて、２次コイル４の高
圧側（２次ターミナル側）とコア８および１次コ
イル２との間の距離が、小型化しても充分耐圧が
得られるように離してある。
The present invention will be described below with reference to embodiments shown in the drawings. In Fig. 1, 1 is a cylindrical 1 made of synthetic resin.
A lid portion 1a is integrally provided at the tip of the next bobbin, and a small through hole 10 is provided in this lid portion 1a.
is formed. Further, a large diameter portion (stopper portion) 1b is formed on the primary bobbin 1 adjacent to the lid portion 1a, and a winding wire is formed on the outer periphery of the intermediate portion of the primary bobbin 1 adjacent to the large diameter portion 1b. A primary coil 2 is formed in the winding recess 1c.
is wound. Further, the other end of the primary bobbin 1 is an open end. 3 is a secondary bobbin made of synthetic resin with a plurality of winding grooves formed on the outer periphery, and primary bobbin 1
The secondary coil 4 is arranged on the outer periphery of the secondary coil 4, and the secondary coil 4 is wound in parts in the winding groove on the outer periphery. Further, a lid portion 3a is formed at one end of the secondary bobbin 3, and a core positioning protrusion 3b that projects in the axial direction toward the inside of the primary bobbin 1 is integrated into the center of the inner bottom surface of the lid portion 3a. Further, a terminal fixing projection 3c is integrally formed on the outside of the lid portion 3a.
Reference numeral 5 designates a secondary terminal fixed to a terminal fixing protrusion, which includes a protrusion 5a to which the high-voltage end of the secondary coil 4 is connected, and a threaded portion 5b to which the high-voltage cord is connected.
It has Reference numeral 6 denotes a synthetic resin case, in which a partition wall 6a is integrally formed to partition the ignition coil side and the control circuit side, and a mounting stay 6b is integrally formed on the outer wall. Furthermore, a connector part 6c for the primary terminal and a cylindrical part 6d for the high voltage cord are integrally formed on the bottom wall so as to communicate with the inside of the case 6, and the screw part 5b of the secondary terminal 5 is connected to the cylindrical part 6d for the high voltage cord. It is placed protruding inside. 7 is a thermosetting resin that is vacuumed and injected into the case 6 and then hardened;
The lid portion 1a is made to protrude from inside the resin 7 to the outside. 8 has approximately the same diameter as the inner diameter of the primary bobbin 1 (slightly smaller diameter is better), and is approximately 1 mm or more larger than the dimension from the inner surface of the lid of the primary bobbin 1 to the tip of the core positioning protrusion 3b of the secondary bobbin 3. A short cylindrical core inserted inside the primary bobbin 1, and a gap 11 of 1 mm or more is formed between the end surface of the core 8 and the lid 1a of the primary bobbin 1. has been done. Further, the core positioning protrusion 3b of the secondary bobbin 3 comes into contact with the end surface of the core 8, and the cores 8 and 1
The secondary bobbin 1 is positioned shifted in the axial direction with respect to the secondary bobbin 3, and the distance between the high voltage side (secondary terminal side) of the secondary coil 4 and the core 8 and the primary coil 2 is They are spaced apart to ensure sufficient pressure resistance even when downsized.
９は点火コイルの１次コイル２の電流を断続す
るための制御回路部で、ケース６内に隔壁６ａを
介して点火コイル側と分離して収納されている。
１３は制御回路部９の各電気回路部品を装着した
プリント基板、１４はプリント基板１３に固定さ
れると共に１次ターミナル用コネクタ部６ｃ内に
配置された１次ターミナルである。そして、この
ターミナル１４の根本部側端には第３図および第
４図に示すごとく脚部１４ａが突出形成され、こ
の脚部１４ａには屈曲形状の打出し部１４ｂが形
成されていて、この打出し部１４ｂと脚部１４ａ
とによつて１次ターミナル１４がプリント基板１
３の貫通穴１３ａに圧入嵌合固定されている。 Reference numeral 9 denotes a control circuit section for intermittent current flowing through the primary coil 2 of the ignition coil, and is housed in the case 6 separated from the ignition coil side via a partition wall 6a.
13 is a printed circuit board on which each electric circuit component of the control circuit section 9 is mounted; 14 is a primary terminal fixed to the printed circuit board 13 and disposed within the primary terminal connector section 6c. As shown in FIGS. 3 and 4, a protruding leg portion 14a is formed on the root side end of the terminal 14, and a bent portion 14b is formed on this leg portion 14a. Embossed portion 14b and leg portion 14a
Depending on the primary terminal 14, the printed circuit board 1
It is press-fitted and fixed into the through hole 13a of No. 3.
１５はターミナル１４の根本側外周に装着され
たゴム等の弾性対よりなるブツシユで、その外周
には、ひだ１５ａがリング状に一体に形成されて
いる。そして、このブツシユ１５は、１次ターミ
ナルコネクタ部６ｃ根本部にケース６内部と連通
させて形成した円形穴６ｅ内に圧入されていて、
このブツシユ１５の存在により、ケース６底部か
らの注型樹脂７の漏れを防ぐようにしてある。 Reference numeral 15 denotes a bush made of an elastic pair of rubber or the like attached to the outer periphery of the base side of the terminal 14, and a ring-shaped fold 15a is integrally formed on the outer periphery of the bush. The bush 15 is press-fitted into a circular hole 6e formed at the base of the primary terminal connector portion 6c so as to communicate with the inside of the case 6.
The presence of this bush 15 prevents the casting resin 7 from leaking from the bottom of the case 6.
上記構成において、１次ボビン１の開放端より
コア８を挿入し、１次ボビン１の開放端は２次ボ
ビン３の内側へ挿入されている。コア８と１次ボ
ビン１の蓋部１ａとの間に隙間１１が１mm以上あ
り、１次ボビン１の蓋部１ａは注型樹脂７面より
突き出しているため、コア８は１次ボビン１の中
で隙間１１分だけ軸方向に自由に動けるようにな
つており、冷熱サイクルによる応力を吸収して、
耐冷熱性を向上させることができる。 In the above configuration, the core 8 is inserted from the open end of the primary bobbin 1, and the open end of the primary bobbin 1 is inserted inside the secondary bobbin 3. There is a gap 11 of 1 mm or more between the core 8 and the lid 1a of the primary bobbin 1, and the lid 1a of the primary bobbin 1 protrudes from the surface of the casting resin 7. Inside, there is a gap of 11 minutes that allows for free movement in the axial direction, absorbing stress caused by heating and cooling cycles,
Cold and heat resistance can be improved.
また、１次ボビン１の蓋部１ａに形成した貫通
穴１０は、真空引きしてケース６内に注型樹脂７
を注入した後、硬化させる際に、隙間１１内に注
型樹脂７が入り込むのを防止して、蓋部１ａとコ
ア８との間に隙間１１が確実に形成されるように
し、冷熱サイクル時のコア８の１次ボビン１に対
する移動が妨げられないようにするためのもので
ある。 Further, the through hole 10 formed in the lid portion 1a of the primary bobbin 1 is evacuated and the casting resin 7 is inserted into the case 6.
After injecting and curing, the casting resin 7 is prevented from entering into the gap 11, and the gap 11 is reliably formed between the lid part 1a and the core 8. This is to prevent movement of the core 8 relative to the primary bobbin 1 from being obstructed.
第２図は本考案の他の実施例を示すもので、第
１図図示の実施例に対し、１次ボビン１の先端を
開口端とし、この開口端に別体の蓋部１２を被せ
たものである。この実施例においても蓋部１２と
コア８との間に隙間１１を形成することにより上
記第１実施例と同様の効果が得られる。 FIG. 2 shows another embodiment of the present invention, which is different from the embodiment shown in FIG. It is something. In this embodiment as well, by forming the gap 11 between the lid portion 12 and the core 8, the same effects as in the first embodiment can be obtained.
なお、上述した実施例においては、点火コイル
と制御回路とを１つのケース６内に収納したが、
点火コイルのみをケース６内に単体で収納するも
のにも本考案を適用することができる。 In addition, in the embodiment described above, the ignition coil and the control circuit were housed in one case 6, but
The present invention can also be applied to a case in which only the ignition coil is housed in the case 6.
以上述べたように本考案においては、１次ボビ
ン内でコアが隙間分だけ移動して、線膨脹係数の
差を吸収するから、冷熱サイクルによる注型樹脂
のクラツクの発生や、１次ボビン等の破損を確実
に防止することができるという優れた効果があ
る。
As mentioned above, in this invention, the core moves by the gap within the primary bobbin to absorb the difference in linear expansion coefficient, which prevents cracks in the casting resin due to cooling and heating cycles, and prevents the primary bobbin from cracking. This has the excellent effect of reliably preventing damage to the product.
第１図は本考案コイルの一実施例を示す縦断面
図、第２図は本考案コイルの他の実施例を示す縦
断面図、第３図および第４図は上記実施例におけ
る１次ターミナル部分の構造を示す一部断面斜視
図および一部断面正面図である。
１……１次ボビン、１ａ，１２……蓋部、２…
…１次コイル、４……２次コイル、６……ケー
ス、７……注型樹脂をなす熱硬化性樹脂、８……
コア、１０……貫通穴、１１……隙間。
Fig. 1 is a longitudinal sectional view showing one embodiment of the coil of the present invention, Fig. 2 is a longitudinal sectional view showing another embodiment of the coil of the invention, and Figs. 3 and 4 are the primary terminals in the above embodiment. FIG. 2 is a partially sectional perspective view and a partially sectional front view showing the structure of the portion. 1...Primary bobbin, 1a, 12...Lid, 2...
...Primary coil, 4...Secondary coil, 6...Case, 7...Thermosetting resin forming casting resin, 8...
Core, 10... through hole, 11... gap.
Claims (1)
イルとをケース内に収納し、このケース内に注型
樹脂を注入硬化してなる内燃機関用点火コイルに
おいて、内側に前記コアが挿入されると共に外周
に前記１次コイルを巻線した１次ボビンを備え、
この１次ボビンの端面に前記注型樹脂より突出さ
せて蓋部を設けると共に、この蓋部に前記コアの
外径より小さい貫通穴を形成し、さらに、前記蓋
部と前記コアの端面との間に隙間を形成してなる
内燃機関用点火コイル。 In an ignition coil for an internal combustion engine, a core and primary and secondary coils arranged around the outer periphery of the core are housed in a case, and a casting resin is injected and hardened into the case, and the core is inserted inside. and a primary bobbin having the primary coil wound around its outer periphery,
A lid portion is provided on the end surface of the primary bobbin so as to protrude from the casting resin, and a through hole smaller than the outer diameter of the core is formed in the lid portion. An ignition coil for internal combustion engines with a gap formed between the coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11372284U JPS6130226U (en) | 1984-07-25 | 1984-07-25 | Ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11372284U JPS6130226U (en) | 1984-07-25 | 1984-07-25 | Ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6130226U JPS6130226U (en) | 1986-02-24 |
| JPH0215306Y2 true JPH0215306Y2 (en) | 1990-04-25 |
Family
ID=30672745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11372284U Granted JPS6130226U (en) | 1984-07-25 | 1984-07-25 | Ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6130226U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017342A (en) * | 2001-06-29 | 2003-01-17 | Diamond Electric Mfg Co Ltd | Ignition coil for internal combustion engine |
| JP2010118466A (en) * | 2008-11-12 | 2010-05-27 | Tamura Seisakusho Co Ltd | Inductor |
-
1984
- 1984-07-25 JP JP11372284U patent/JPS6130226U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6130226U (en) | 1986-02-24 |
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