JPS60198713A - Manufacture of ignition coil for internal-combustion engine - Google Patents
Manufacture of ignition coil for internal-combustion engineInfo
- Publication number
- JPS60198713A JPS60198713A JP59055086A JP5508684A JPS60198713A JP S60198713 A JPS60198713 A JP S60198713A JP 59055086 A JP59055086 A JP 59055086A JP 5508684 A JP5508684 A JP 5508684A JP S60198713 A JPS60198713 A JP S60198713A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- coil
- synthetic resin
- secondary coil
- ignition 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- 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
- H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、内燃機関用点火コイルの製造方法、特に点火
プラグに直接装着される内燃機関用点火コイルの製造方
法であって、当該点火コイルを構成する部品を高絶縁性
の合成樹脂によってモールドし、当該モールド体を包蔵
しかつ」二記点火プラグに係合する保合部を形成するよ
うにモールＦするようにした内燃機関用点火コイルの製
造方法に関するものでおる。Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a method for manufacturing an ignition coil for an internal combustion engine, and in particular a method for manufacturing an ignition coil for an internal combustion engine that is directly attached to a spark plug. An ignition coil for an internal combustion engine in which the constituent parts are molded with a highly insulating synthetic resin, the molded body is enclosed, and a molding F is formed to form a retaining part that engages with a spark plug. This is related to the manufacturing method.
（技術の背景と問題点）
ある種の内燃機関は、空気と燃料とを所定の比率に混合
したものを圧縮した状態で、点火プラグを用いて火花を
発生させることによシいわゆる着火を行っている。そし
て該着火匹よって急激に前記混合気を燃焼させることに
より、所望の動力を得ている。従来、前記点火プラグに
所定の高電圧を印加するのに点火プラグと離れた位置に
イグニション・コイル（点火コイル）を設け、該イグニ
ション・コイルから高耐圧用のコードを用いて前記点火
プラグに高電圧を印加する方式がとられていた。しかし
、このような方式においては、上記高耐圧用のコードか
らの漏洩発生などが問題となっていた。そのため、第１
図に図示されている如く、点火コイル１を点火プラグ２
に直接装着することが考慮されるようになった。このよ
うに、点火コイル１を点火プラグ２に直接装着する場合
には、スペース上の問題から点火コイル１の径（図示矢
印ψンをできるだけ小さくすることが要求される。従っ
て、第１図図示の如く、磁鉄心３を中央に配置したボビ
ン４に１次コイル５と２次コイル６とを巻回すると共に
、当該２次コイル６の出力コード７をサージ吸収用の抵
抗体８を介して上記点火プラグ２に装着するための装着
金具９に接続するように構成し、これらを合成樹脂によ
ってモールドすることによって径ψが２ Ｑ ｙａｒｎ
程度の小径の点火コイル１を提供することができるよう
になった。しかしながら、上記モールドを行なうに当っ
て、次のような問題がある。即ち、モールド体は、上記
２次コイル６の出力は高電圧であるために高い耐電圧性
を有することと、点火プラグ２に係合させるために必要
な機械的強度＜ｒｒｆｐｔさのないこと）を有すること
が必要である。しかし、一般にモールド体は、上記耐電
圧性が高ければ、機械的強度は小であシ、逆に機械的強
度が大であれば耐電圧性が悪いという性質をもっている
。従って次に述べるような点火コイルの製造方法が考慮
される。即ち、製造に当って用いる金型の種類や数を少
なくしたいことなどから、先づ第１図に図示されている
如く、前述した１次コイル５．２次コイル６等を収納せ
しめる収納空間１１と点火プラグ２と係合する保合部（
第１図図示例においてはネジ）１０を有する例えばナイ
ロン系の合成樹脂によって筐体１２を成形する。そして
、上記収納空間１１に前述した１次コイル５．２次コイ
ル６等の部品を配設して例えばエポキシ系の合成樹脂の
ような高電気絶縁性合成樹脂でもってモールドを行ない
モールド体１３を形成する。このようにして製造された
点火コイルにも次のような問題点がある。即ち、上記説
明において省略したが、上記収納空間１１に部品を配設
する際に、例えば・・ンダ付は等の手段により、抵抗体
８と装着金具９との接続および出力コード７と抵抗体８
との接続を行なわなければならない。しかしながら、前
述した如く、上記収納空間１１は狭隘であるため、上記
ハンダ付は作業が困難であシ、更に上記出力コード７を
抵抗体８に接続する際にはボビン４が邪魔になるため上
記出力コード７を長くすれば耐電圧性に悪影響を及ぼす
等の問題がある。また、高電気絶縁性合成樹脂が万遍な
くゆきわたるようにするには技術を要する。(Technical Background and Problems) Some types of internal combustion engines ignite a mixture of air and fuel in a predetermined ratio by generating a spark using a spark plug. ing. The desired power is obtained by rapidly combusting the air-fuel mixture by the ignition engine. Conventionally, in order to apply a predetermined high voltage to the spark plug, an ignition coil (ignition coil) is provided at a location away from the spark plug, and a high voltage cord is used from the ignition coil to apply the high voltage to the spark plug. A method of applying voltage was used. However, in such a system, leakage from the high voltage cord has been a problem. Therefore, the first
As shown in the figure, connect the ignition coil 1 to the spark plug 2.
It is now considered to be attached directly to the In this way, when the ignition coil 1 is directly attached to the spark plug 2, it is required to make the diameter of the ignition coil 1 (indicated by the arrow ψ) as small as possible due to space considerations. As shown in the figure, a primary coil 5 and a secondary coil 6 are wound around a bobbin 4 in which a magnetic core 3 is arranged in the center, and an output cord 7 of the secondary coil 6 is connected through a surge absorbing resistor 8. It is configured to be connected to the mounting fitting 9 for mounting on the spark plug 2, and by molding these with synthetic resin, the diameter ψ is 2 Q yarn.
It has become possible to provide an ignition coil 1 with a small diameter. However, when carrying out the above molding, there are the following problems. That is, the molded body has high voltage resistance because the output of the secondary coil 6 is a high voltage, and has no mechanical strength <rrfpt required for engaging the spark plug 2). It is necessary to have However, in general, a molded body has a property that if the voltage resistance is high, the mechanical strength is low, and conversely, if the mechanical strength is high, the voltage resistance is poor. Therefore, the following ignition coil manufacturing method is considered. That is, since it is desired to reduce the types and number of molds used in manufacturing, as shown in FIG. and the retaining part (
In the example shown in FIG. 1, the casing 12 is made of, for example, nylon-based synthetic resin and has screws 10. Then, components such as the primary coil 5 and secondary coil 6 described above are arranged in the storage space 11, and molded with a highly electrically insulating synthetic resin such as epoxy synthetic resin to form a molded body 13. Form. Ignition coils manufactured in this manner also have the following problems. That is, although omitted in the above description, when disposing the components in the storage space 11, for example, the connection between the resistor 8 and the mounting bracket 9, and the connection between the output cord 7 and the resistor 8
A connection must be made with the However, as mentioned above, since the storage space 11 is narrow, the soldering work is difficult, and the bobbin 4 gets in the way when connecting the output cord 7 to the resistor 8. If the output cord 7 is made longer, there are problems such as an adverse effect on voltage resistance. Furthermore, it requires skill to ensure that the highly electrically insulating synthetic resin is evenly distributed.
（発明の目的と構成）
本発明は、上記の如き問題を解決することを目的とし、
高い耐電圧性を有しかつ小径でコンパクトな内燃機関用
点火コイルを容易に製造し得る製造方法を提供すること
を目的としている。そのため、本発明の内燃機関用点火
コイルの製造方法は、１次コイルと２次コイルと該２次
コイルに接続されたサージ吸収用抵抗と該サージ吸収用
抵抗に接続されかつ点火プラグに装着される装着金具と
から構成され、これらが合成樹脂によってモールドされ
た内燃機関用点火コイルの製造方法において、上記サー
ジ吸収用抵抗を上記２次コイルおよび装着金具に接続し
た状態のもとで、上記１次コイル、２次コイル、サージ
吸収用抵抗および装着金具を包蔵するように高電気絶縁
性の合成樹脂によってモールドを行なったのち、当該モ
ールド体を包蔵しかつ上記点火プラグに係合される係合
部を形成するようにモールドすることを特徴としている
。(Object and structure of the invention) The present invention aims to solve the above problems,
It is an object of the present invention to provide a manufacturing method that can easily manufacture an ignition coil for an internal combustion engine that has high voltage resistance and is small in diameter and compact. Therefore, the method for manufacturing an ignition coil for an internal combustion engine of the present invention includes a primary coil, a secondary coil, a surge absorbing resistor connected to the secondary coil, and a surge absorbing resistor connected to the surge absorbing resistor and attached to a spark plug. In the method for manufacturing an ignition coil for an internal combustion engine, the surge absorbing resistor is connected to the secondary coil and the mounting bracket, and the surge absorbing resistor is connected to the secondary coil and the mounting bracket. After molding the secondary coil, the secondary coil, the surge absorbing resistor, and the mounting metal fittings using a synthetic resin with high electrical insulation, an engagement member that encloses the molded body and engages with the spark plug is formed. It is characterized by being molded to form a section.
（発明の実施例） 以下、図面を参照しつつ本発明の詳細な説明する。(Example of the invention) Hereinafter, the present invention will be described in detail with reference to the drawings.
第２図は本発明の製造方法によって製造された内燃機関
用点火コイルの一実施例における断面図を示す。図中の
符号１、ないし１０は第１図に対応しており、１４は第
１のモールド体、１５は第２のモールド体を表わしてい
る。FIG. 2 shows a sectional view of an embodiment of an ignition coil for an internal combustion engine manufactured by the manufacturing method of the present invention. Reference numerals 1 to 10 in the figure correspond to those in FIG. 1, 14 represents a first mold body, and 15 represents a second mold body.
本発明においては、径ψを小さくするために、前述した
第１図図示例と同様に磁鉄心３を中央に配設したボビン
４に、１次コイル５と２次コイル６とを同心状に巻回す
るようにしている。そして、上記２次コイル６の出力線
である出力コード７と抵抗体８、および該抵抗体８と装
着金具９とを夫々例えばハンダ付けによって接続した上
で、上記ボビン４、抵抗体８および装着金具９を図示省
略した成形治具内に配置して例えばエポキシ系の合成樹
脂のように高電気絶縁性合成樹脂を用い例えば真空注形
法によるモールドを行なう。このようにして、第２図に
図示されている如く、点火コイル１の構成部品（磁鉄心
４、・・・・装着金具９）は、高電気絶縁性合成樹脂か
らなる第１のモールド体１４によってコンパクトかつ柱
状にモールドされる。以上説明した第１のモールド工程
においては、上記出力コード７と抵抗体８との接続を容
易に行なうことができることから、当該出力コード７の
長さを必要最小限度に短かくすること、樹脂が万遍なく
ゆきわたることなどが可能である。このことは、電流漏
洩防止や高耐電圧の点で大きな効果がある。In the present invention, in order to reduce the diameter ψ, the primary coil 5 and the secondary coil 6 are arranged concentrically on the bobbin 4 in which the magnetic core 3 is disposed in the center, similar to the example shown in FIG. I'm trying to wrap it around. Then, the output cord 7, which is the output line of the secondary coil 6, and the resistor 8, and the resistor 8 and the mounting fittings 9 are connected, for example, by soldering, and then the bobbin 4, the resistor 8, and the mounting fittings are connected. The metal fitting 9 is placed in a molding jig (not shown) and molded using a highly electrically insulating synthetic resin such as epoxy synthetic resin, for example, by vacuum casting. In this way, as shown in FIG. 2, the components of the ignition coil 1 (magnetic core 4, mounting fittings 9) are assembled into the first molded body 14 made of highly electrically insulating synthetic resin. It is molded into a compact and columnar shape. In the first molding process described above, since the output cord 7 and the resistor 8 can be easily connected, the length of the output cord 7 is shortened to the minimum necessary, and the resin is It is possible for it to spread evenly. This has great effects in terms of current leakage prevention and high withstand voltage.
次に、上記第１のモールド工程によって上記点火コイル
１の構成部品を包蔵して形成された第１のモールド体１
４を包蔵する第２のモールド工程を行なう。当該第２の
モールド工程は、例えばナイロン系合成樹脂やＰＢＴ等
のように機械的強度の大きい合成樹脂を用いた射出成形
法によって行なう。なお、当該射出成形時には、点火プ
ラグ２に係合せしめるための保合部１０も同時に成形さ
れる。このようにして、第２図に図示されている如く、
上記第１のモールド体１４を包蔵しかつ上記保合部１０
を有する第２のモールド体１５が形成される。Next, a first molded body 1 is formed by enclosing the components of the ignition coil 1 in the first molding step.
A second molding process is performed to encapsulate 4. The second molding step is performed by injection molding using a synthetic resin with high mechanical strength, such as nylon synthetic resin or PBT. Incidentally, during the injection molding, the retaining portion 10 for engaging the spark plug 2 is also molded at the same time. In this way, as illustrated in FIG.
Contains the first mold body 14 and the retaining part 10
A second molded body 15 is formed.
上記第１および第２のモールド工程によって、第２図図
示の如く、上記係合部１０によって点火プラグ２に係合
され、装着金具９によって点火プラグ２に直接装着され
る点火コイル１が製造される。Through the first and second molding steps, the ignition coil 1 is manufactured, as shown in FIG. Ru.
（発明の効果）
以上説明した如く、本発明によれば、モールド加工前に
行なう出力コードと抵抗体、および抵抗体と装着金具と
の接続作業が容易となり、そのため上記出力コードの長
さを必要最小限度にすることができるため電圧損失を軽
減することが可能となると共に、所望のコンノくクト化
（特に図示矢印径ψの短縮化）を図ることのできる内燃
機関用点火コイルの製造方法を提供することができる。(Effects of the Invention) As explained above, according to the present invention, the connection work between the output cord and the resistor, and between the resistor and the mounting bracket, which is performed before molding, is facilitated, and therefore the length of the output cord is not required. A method for manufacturing an ignition coil for an internal combustion engine that can reduce voltage loss by minimizing the voltage loss, and also achieve the desired compactness (in particular, shortening the diameter ψ of the arrow shown in the figure). can be provided.
第１図は従来の内燃機関用点火コイルの製造方法の問題
点を説明するための説明図、第２図は本発明の製造方法
によって製造された内燃機関用点火コイルの一実施例に
おける断面図を示す。
図中、１は点火コイル、２は点火プラグ、３は磁鉄心、
４はボビン、５は１次コイル、６は２次コイル、７は出
力コード、８は抵抗体、９は装着金具、１０は係合部、
１４は第１のモールド体、１５は第２のモールド体を衣
わす。
特許出願人 澤藤電機株式会社FIG. 1 is an explanatory diagram for explaining the problems of the conventional method of manufacturing an ignition coil for an internal combustion engine, and FIG. 2 is a cross-sectional view of an embodiment of an ignition coil for an internal combustion engine manufactured by the manufacturing method of the present invention. shows. In the figure, 1 is an ignition coil, 2 is a spark plug, 3 is a magnetic core,
4 is a bobbin, 5 is a primary coil, 6 is a secondary coil, 7 is an output cord, 8 is a resistor, 9 is a mounting bracket, 10 is an engaging part,
14 is a first mold body, and 15 is a second mold body. Patent applicant: Sawafuji Electric Co., Ltd.
Claims (1)
ージ吸収用抵抗と該サージ吸収用抵抗に接続されかつ点
火プラグに装着される装着金具とから構成され、これら
が合成樹脂によってモールドされた内燃機関用点火コイ
ルの製造方法において、上記サージ吸収用抵抗を上記２
次コイルおよび装着金具に接続した状態のもとで、上記
１次コイル、２次コイル、サージ吸収用抵抗および装着
金具を包蔵するように高電気絶縁性の合成樹脂によって
モールドを行なったのち、当該モールド体を包蔵しかつ
上記点火プラグに係合される保合部を形成するようにモ
ールドすることを特徴とする内燃機関用点火コイルの製
造方法。It consists of a primary coil, a secondary coil, a surge absorbing resistor connected to the secondary coil, and a mounting fitting connected to the surge absorbing resistor and attached to the spark plug, and these are molded with synthetic resin. In the method for manufacturing an ignition coil for an internal combustion engine, the surge absorbing resistor is
While connected to the secondary coil and mounting bracket, the primary coil, secondary coil, surge absorption resistor, and mounting bracket are molded using a synthetic resin with high electrical insulation properties. 1. A method of manufacturing an ignition coil for an internal combustion engine, comprising molding the ignition coil to form a retaining portion that encloses a molded body and is engaged with the ignition plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59055086A JPS60198713A (en) | 1984-03-22 | 1984-03-22 | Manufacture of ignition coil for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59055086A JPS60198713A (en) | 1984-03-22 | 1984-03-22 | Manufacture of ignition coil for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60198713A true JPS60198713A (en) | 1985-10-08 |
Family
ID=12988908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59055086A Pending JPS60198713A (en) | 1984-03-22 | 1984-03-22 | Manufacture of ignition coil for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60198713A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1598910A1 (en) | 2004-05-18 | 2005-11-23 | Robert Bosch Gmbh | Connection device between a spark plug and an ignition coil |
| CN100422375C (en) * | 2006-01-25 | 2008-10-01 | 周向儒 | Chromium steel series die steel and heat treatment technique thereof |
| JP2015138821A (en) * | 2014-01-21 | 2015-07-30 | ダイヤモンド電機株式会社 | Method of manufacturing ignition coil for internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254674U (en) * | 1975-10-17 | 1977-04-20 |
-
1984
- 1984-03-22 JP JP59055086A patent/JPS60198713A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254674U (en) * | 1975-10-17 | 1977-04-20 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1598910A1 (en) | 2004-05-18 | 2005-11-23 | Robert Bosch Gmbh | Connection device between a spark plug and an ignition coil |
| EP1598910B1 (en) * | 2004-05-18 | 2011-01-05 | Robert Bosch Gmbh | Connection device between a spark plug and an ignition coil |
| CN100422375C (en) * | 2006-01-25 | 2008-10-01 | 周向儒 | Chromium steel series die steel and heat treatment technique thereof |
| JP2015138821A (en) * | 2014-01-21 | 2015-07-30 | ダイヤモンド電機株式会社 | Method of manufacturing ignition coil for internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2198292A (en) | Ignition coil for internal combustion engine | |
| US6457229B1 (en) | Ignition device for internal combustion engine | |
| JPH0666240A (en) | Ignition device for internal combustion engine | |
| JPS60198713A (en) | Manufacture of ignition coil for internal-combustion engine | |
| US6114933A (en) | Pencil ignition coil assembly module environmental shield | |
| WO1993013534A1 (en) | Ignition coil for internal combustion engines | |
| US5041807A (en) | High tension connection for an ignition coil, in particular for an internal combustion engine for an automotive vehicle | |
| JPS5613712A (en) | Ignition coil for internal combustion engine | |
| ES436392A1 (en) | Insulated resin-clad ignition coil for an internal combustion engine and method of manufacturing same | |
| US5343614A (en) | Method for manufacturing coils | |
| JPH0552436B2 (en) | ||
| JP2001217131A (en) | Ignition coil for internal combustion engine | |
| JP3188744B2 (en) | A method for mounting a plurality of ignition coils on an engine block and a power supply assembly for employing the method | |
| JP3601256B2 (en) | Ignition device for internal combustion engine | |
| AU638443B2 (en) | Magneto construction | |
| JPH10223464A (en) | Ignition coil device for internal-combustion engine | |
| JPS6121581Y2 (en) | ||
| JP4262930B2 (en) | Ignition coil for internal combustion engine | |
| JPH08264352A (en) | Internal combustion engine ignition coil | |
| JPS5819340Y2 (en) | igniter unit | |
| JPS63164307A (en) | Ignition coil for internal combustion engine | |
| JPH029531Y2 (en) | ||
| JPH0139203B2 (en) | ||
| JPH09158821A (en) | Ignition coil for internal combustion engine | |
| JPS62139308A (en) | Ignition coil for internal combustion engine |