JPS61107712A - Ignition coil for internal-combustion engine - Google Patents
Ignition coil for internal-combustion engineInfo
- Publication number
- JPS61107712A JPS61107712A JP59229881A JP22988184A JPS61107712A JP S61107712 A JPS61107712 A JP S61107712A JP 59229881 A JP59229881 A JP 59229881A JP 22988184 A JP22988184 A JP 22988184A JP S61107712 A JPS61107712 A JP S61107712A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- resin
- partition wall
- bobbin
- primary
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の点火装置における高電圧を発生す
る点火コイルの、特に複数の溝を有する２次ボビンの構
造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ignition coil for generating high voltage in an ignition system for an internal combustion engine, particularly to the structure of a secondary bobbin having a plurality of grooves.
従来、２次ボビンは第３図に示すような形状の仕切壁４
ａによって区画されているが、この形状であると仕切壁
４ａと巻線３とが密接しているため、注型樹脂が２ボビ
ン４底部の巻線まで浸透しに＜＜、樹脂の浸透不良によ
る絶縁破壊が起こるという問題があった。そこで、従来
、２次巻線を巻回する２次ボビンの各仕切壁の巻線と対
向する側面に放射状に延びる複数の突条を設けること（
例えば、実開昭５８−９９８２３号公報）が知られてい
る。Conventionally, the secondary bobbin has a partition wall 4 having a shape as shown in FIG.
However, with this shape, the partition wall 4a and the winding 3 are in close contact with each other, so the casting resin may not penetrate to the winding at the bottom of the 2 bobbin 4, resulting in poor penetration of the resin. There was a problem that dielectric breakdown occurred due to Therefore, conventionally, a plurality of radially extending protrusions are provided on the side surface facing the winding of each partition wall of the secondary bobbin around which the secondary winding is wound (
For example, Japanese Utility Model Application Publication No. 58-99823) is known.
ところが、このものにおいても、各仕切壁に放射状に延
びる複数の突条を形成しているので、２次ボビンの型構
造が非常に複雑となり、実用に供することができないと
いう問題があった。However, in this case as well, since a plurality of radially extending protrusions are formed on each partition wall, the mold structure of the secondary bobbin becomes very complicated, and there is a problem that it cannot be put to practical use.
そこで、本発明は２分割程度の安価な型構造で各仕切壁
と巻線との間への注型樹脂の浸透性を向上させることを
目的とする。Therefore, an object of the present invention is to improve the permeability of the casting resin between each partition wall and the winding wire using an inexpensive mold structure that is divided into about two parts.
そのため本発明は、２次ボビンの各仕切壁の成型型別方
向に複数の溝を形成したものである。Therefore, in the present invention, a plurality of grooves are formed in different molding directions of each partition wall of the secondary bobbin.
これにより、各仕切壁の溝によって各仕切壁と溝との間
に形成される間隙内に注型樹脂が確実に浸透し、かつ２
次ボビンの成型型も型側方向に延びる溝に沿って容易に
分割できる。This ensures that the casting resin permeates into the gap formed between each partition wall and the groove by the grooves of each partition wall, and
The mold for the next bobbin can also be easily divided along the grooves extending in the side direction of the mold.
以下本発明を図に示す実施例について説明する。 The present invention will be described below with reference to embodiments shown in the drawings.
第１図において、１は鉄心で、その外周には樹脂製の１
次スプール１ａが一体成型されており、この１次スプー
ル１ａの外周に１次巻線２が巻線されており、その外周
に、２次コイル３を分割巻きする複数の溝を有する樹脂
製の２次ボビン４（第４図にその全体構造を示す）が配
置されている。In Figure 1, 1 is an iron core, and a resin 1 is attached to its outer periphery.
A secondary spool 1a is integrally molded, a primary winding 2 is wound around the outer periphery of the primary spool 1a, and the outer periphery is made of resin having a plurality of grooves for winding the secondary coil 3 in sections. A secondary bobbin 4 (whose overall structure is shown in FIG. 4) is arranged.
そして、これらの巻線部分を樹脂ケース６内に挿入した
後、注型樹脂５を注入し、加熱硬化させる。After inserting these winding portions into the resin case 6, the casting resin 5 is injected and hardened by heating.
第５図は本発明で用いる２次ボビン４に巻回される巻線
の一部を示したもので、第１図に示すごとく各仕切壁４
ａ両側面の型側方向に複数の溝４ｂが形成され、この溝
４ｂによって各仕切壁４ａの側面と２次巻線３との間に
間隙７が形成される。FIG. 5 shows a part of the winding wire wound around the secondary bobbin 4 used in the present invention, and as shown in FIG.
A plurality of grooves 4b are formed in the mold side direction on both side surfaces a, and gaps 7 are formed between the side surfaces of each partition wall 4a and the secondary winding 3 by the grooves 4b.
これにより、注型樹脂５が間隙７を通してポビン４底部
の最下層の２次巻線３まで十分に浸透させることかでき
る。また、２次巻線３の巻線方向と溝４ｂの方向とが一
致した場合、溝４ｂに巻線が入り込み効果が低下する問
題があるが、第１図に示すように、型割り境界近辺の仕
切壁４ａの一部４Ｃには溝を形成していない部分が直線
状に形成されていて、これを防いでいる。従って、仕切
壁４ａの型割り境界近辺の一部４Ｃに対して直角方向に
すべての溝４ｂが延びることになる。また、このような
構成によって、２分割の型による２次ボビンの成型を可
能にしている。This allows the casting resin 5 to sufficiently permeate through the gap 7 to the lowermost secondary winding 3 at the bottom of the pot bin 4. Furthermore, if the winding direction of the secondary winding 3 and the direction of the groove 4b match, there is a problem that the winding gets into the groove 4b and the effect is reduced. A portion 4C of the partition wall 4a has a straight portion in which no groove is formed to prevent this. Therefore, all the grooves 4b extend in the direction perpendicular to the part 4C of the partition wall 4a near the mold boundary. Further, such a configuration allows the secondary bobbin to be molded using a two-part mold.
本発明における仕切壁４ａの溝４ｂの形状、高さ、間隔
は任意である。In the present invention, the shape, height, and spacing of the grooves 4b of the partition wall 4a are arbitrary.
本発明によれば、仕切壁の型割方回に複数の溝を形成す
ることによって、簡単な型構造で注型樹脂の浸透性を向
上させることができ、２次巻線の絶縁性能が向上し、内
部にボイドのできない高信頼性の点火コイルが安価に提
供できるという優れ 、、：た効果がある。According to the present invention, by forming a plurality of grooves in the mold dividing groove of the partition wall, the permeability of the casting resin can be improved with a simple mold structure, and the insulation performance of the secondary winding is improved. This has the advantage of being able to provide a highly reliable ignition coil with no internal voids at a low cost.
第１図は本発明コイルにおける２次ボビンの一実施例の
要部構造を示す斜視図、第２図は本発明ボビンを適用す
る点火コイルの一実施例を示す縦断面図、第３図は従来
のボビンに巻回される巻線の一部を示す拡大縦断面図、
第４図は本発明で用いるボビンの正面図、第５図は第４
図図示ボビンに巻回される巻線の一部を示す拡大縦断面
図である。
１ａ・・・１次スプール、２・・・１次巻線、３・・・
２次巻線、４．・・・２次ボビン、４ａ・・・仕切壁、
４ｂ・・・溝、５・・・注型樹脂、６・・・ケース。FIG. 1 is a perspective view showing the main structure of an embodiment of a secondary bobbin in a coil of the present invention, FIG. 2 is a longitudinal sectional view showing an embodiment of an ignition coil to which the bobbin of the present invention is applied, and FIG. An enlarged vertical cross-sectional view showing a part of the winding wire wound on a conventional bobbin,
Fig. 4 is a front view of the bobbin used in the present invention, and Fig. 5 is a front view of the bobbin used in the present invention.
FIG. 2 is an enlarged vertical cross-sectional view showing a part of the winding wire wound around the illustrated bobbin. 1a...Primary spool, 2...Primary winding, 3...
Secondary winding, 4. ...Secondary bobbin, 4a...Partition wall,
4b...Groove, 5...Casting resin, 6...Case.
Claims (1)
を有する２次ボビンに分割巻された２次巻線を配置し、
前記１次巻線、２次巻線をケース内に挿入した後、注型
樹脂を注入し加熱硬化させる内燃機関用点火コイルにお
いて、前記２次ボビンの各仕切壁の成型用型割方向に複
数の溝を形成した内燃機関用点火コイル。A secondary winding that is split and wound around a secondary bobbin having a plurality of grooves is arranged outside the primary winding that is wound on the primary spool,
In the ignition coil for an internal combustion engine, in which a casting resin is injected and heated to harden after the primary winding and the secondary winding are inserted into the case, a plurality of ignition coils are formed in the mold dividing direction of each partition wall of the secondary bobbin. An ignition coil for internal combustion engines with grooves formed in it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59229881A JPS61107712A (en) | 1984-10-30 | 1984-10-30 | Ignition coil for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59229881A JPS61107712A (en) | 1984-10-30 | 1984-10-30 | Ignition coil for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61107712A true JPS61107712A (en) | 1986-05-26 |
Family
ID=16899168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59229881A Pending JPS61107712A (en) | 1984-10-30 | 1984-10-30 | Ignition coil for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61107712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7191177B1 (en) * | 2021-10-18 | 2022-12-16 | 三菱電機株式会社 | ignition coil |
-
1984
- 1984-10-30 JP JP59229881A patent/JPS61107712A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7191177B1 (en) * | 2021-10-18 | 2022-12-16 | 三菱電機株式会社 | ignition coil |
| US11776740B2 (en) | 2021-10-18 | 2023-10-03 | Mitsubishi Electric Corporation | Spark coil with the lead terminal between flanges |
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