JPH0318667A

JPH0318667A - Distributor arm electrode for distributor

Info

Publication number: JPH0318667A
Application number: JP15218589A
Authority: JP
Inventors: Yutaka Ohashi; 豊大橋
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1989-06-16
Filing date: 1989-06-16
Publication date: 1991-01-28

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】［産業上の利用分野コこの発明は、内ｍＲ関の配電器用配電子電極に関し、特
に、配電動作に伴う放電火花によるｌｊｔｉ音電波を抑
制する手段を講じた配電器用配電子電極に関するもので
ある．［従来の技ｔＦｉ］第５図は従来の内燃機関用配電器を示し、内燃機関のク
ランク軸の回転に同期して回転する回転軸（１）に固定
された配電子（２）に配電子電極ク３）が設けられてお
り、この配電子電極（３）の回転軌跡に放電ギャップ（
ｇ）を介して複数個の側方電掻（４〉が配置されている
．配電子電！　（３）の上面に導線（５）により点火コ
イルに接続されている接触子（６）が圧接されている．以上の構成により、配電子電極（３）の回転軌跡に近接
して配置された側方電極（４〉には、配電子（２〉の回
転に伴って配電子電［！　（３）が接近する毎に、放電
ギャップ（ｇ＞を介して放電によって高電圧が印加され
、放電ギャップ（ｇ＞に生じる放電によって、各気簡の
点火プラグに順次配電される．このとき、配電子電極（
３）と側方電極（４）間の放電ギャップ（ｇ）に生じる
火花放電によって雑音電波が発生する．この雑音電波は
、ラジオ放送、ＴＶ放送、各種無線通信装置や電子装置
に対して電波障害となり、Ｓ／Ｎ比を悪くする．かかる
雑音電波の発生を抑制する手段として、従来、特公昭５
１−３８８５３号公報に開示されたものがある．これは
、第６図に示すように、配電子電極（３）の側方電極（
４〉に近接した部位の表面に、高抵抗物質層（７）を形
成するものである．以上により製造された配電子電ｉ　
（３）は、側方電極（４〉との間の放電時に発生する雑
音電波の電界強度を低減することができる．［発明が解決しようとする課Ｍ］以上のような従来の配電器用配電子電極は、配電子ｔ極
に高抵抗物質層を設けたことにより、検波方式による雑
音電波の測定のうち、ピーク検波（ＳＡＦ）によると相
当の効果を得ることができるが、準ピーク検波（ＣＴＳ
ＰＲ）によった場合は十分な効果が見られず、そのため
、特にＦＭラジオで雑音電波による障害が依然として解
決されないという問題があった．また、配電子電極の前面に絶縁物層があるため、ラジオ
ノイズが大となり、放電が不安定であるという問題もあ
った．この発明はかような課題を解決するためになされたもの
で、準ピーク検波による測定結果でも雑音電波の抑制効
果が顕著で、かつ、放電ギャップにおいて安定な放電が
得られる配電器用配電子電極を得ることを目的とする．［課題を解決するための手段］この発明の第一の発明に係る配電器用配電子電極は、合
成マイカシ一トまたはマイカフレークとエポキシ樹脂ま
たはシリコン樹脂とからなる板状部材を、配電子電極の
放電部の少なくとも一方の面に固着する．また、第二の発明に係る配電器用配電子電極は、配電子
電極の放電部の少なくとも一方の面に、マイカ板をシリ
コン樹脂接着剤で接着する．［作　　用］この発明の第一、第二の発明においては、放電部の少な
くとも一方の面に固着した板状部材あるいはマイカ仮に
より、放電に伴う誰音電波の発生が抑制されるとともに
、安定した放電が得られる．［実施例コ以下、第１図、第２図を参照して第一の発明の一実施例
を説明する。第１図において、配電子電極（３）は、放
電部に傾斜面〈３ａ）および前縁のギザ形状分（３ｂ〉
が形成されて、放電の安定化を図った横造になっており
、放電部両面に板状部材（８〉が固着されている．板状部材（８〉は、第２図に示すように、マイカフレー
ク（９〉　をエポキシ樹脂（１０）で成形してなるもの
である．以上により製造された配ｔ子電Ｆｆ！（３）は、板状部
材（８）が雑音電波の発生が抑制し、ピーク検波（ＳＡ
Ｆ＞による’ｊｔｌ音電波の測定および準ピーク検波（
ＣｒＳＰＲ）による雑ａ電波の測定のいずれにおいても
雑音電波抑止効果が顕著であることを確認することがで
きた．また、各周波数についての雑音電界強度の測定および聴
覚判定に３いても、データにより上記効果を確認するこ
とができた．なお、上記実施例では配電子電極（３）の上下面に板状
部材〈８〉を設けたが、上下面のいずれが一方に板状部
材（８）を設けてもよい．また、エポキシ樹脂に代えて、シリコン樹脂を用いても
よく、同様の効果がある．さらに、第３図に示すように、板状部材（８）として、
合成マイカシ一ト（９ａ）を複数枚積層し、エポキシ樹
脂またはシリコン樹脂でなる樹脂（１０）により成形し
たものを用いてもよく、同様の効果が得られる．次に、第二の発明の一実施例は、第４図に示すように、
配電子電極（３）の放電部の一方の面（または両面）に
、マイカ板（９ｂ）をシリコン樹脂接着剤（１０ａ）に
より接着固定する．かようにして楕戊された配電子電極は、第一の発明と同
様の効果を奏する．また、第一、第二の発明は、シリコン樹脂が放電に対し
て弱いのをマイカ板が補強する効果および放電の安定性
を向上する効果がある．［発明の効果］以上の説明から明らかなように、第一、第二のこの発明
は、放電部の少なくとも一方の面にマイ力と樹脂でなる
板状部材を固着、またはマイカ板をシリコン樹脂接着剤
で接着固定したので、放電の安定性を確保しつつ、雑音
電波を抑制することができるものが得られる．DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a distribution electrode for an internal power distribution device, and particularly to a distribution electrode for a power distribution device that takes measures to suppress ljti sound and radio waves caused by discharge sparks accompanying power distribution operation. It concerns the distribution electrode. [Conventional technique tFi] Figure 5 shows a conventional power distribution device for an internal combustion engine, which distributes power to a power distribution device (2) fixed to a rotating shaft (1) that rotates in synchronization with the rotation of the crankshaft of the internal combustion engine. A discharge gap (3) is provided on the rotation locus of the distribution electrode (3).
A contact (6) connected to the ignition coil by a conducting wire (5) is pressure-contacted to the top surface of the power distribution device (3). With the above configuration, the side electrode (4> placed close to the rotation locus of the electron distribution electrode (3) receives the distribution electric power [! 3), a high voltage is applied by discharge through the discharge gap (g>), and the discharge generated in the discharge gap (g>) sequentially distributes power to each spark plug. Electronic electrode (
Noise radio waves are generated by the spark discharge that occurs in the discharge gap (g) between 3) and the side electrode (4). These radio noise waves interfere with radio broadcasts, TV broadcasts, various wireless communication devices, and electronic devices, and worsen the S/N ratio. Conventionally, as a means to suppress the generation of such noise radio waves,
There is one disclosed in Publication No. 1-38853. As shown in FIG. 6, this is due to the side electrode (
A high-resistance material layer (7) is formed on the surface of a portion close to 4>. Distribution electronics i manufactured by the above
(3) can reduce the electric field strength of noise radio waves generated during discharge between the side electrode (4). [Problem M to be solved by the invention] By providing a high-resistance material layer on the electron distribution t-electrode, the electronic electrode can obtain a considerable effect when using peak detection (SAF) among noise radio wave measurements using detection methods, but quasi-peak detection ( CTS
(PR) was not sufficiently effective, and as a result, there was a problem that interference caused by radio noise remained unresolved, especially in FM radio. Additionally, since there is an insulating layer in front of the distribution electrode, there is a problem that radio noise becomes large and the discharge becomes unstable. This invention was made in order to solve the above problems, and provides a distribution electrode for a power distribution device that has a remarkable effect of suppressing noise radio waves even in the measurement results by quasi-peak detection, and that can obtain stable discharge in the discharge gap. The purpose is to obtain. [Means for Solving the Problems] A distribution electrode for a power distribution device according to the first aspect of the present invention uses a plate-like member made of synthetic mica silica or mica flakes and an epoxy resin or a silicone resin as a distribution electrode. It sticks to at least one side of the discharge area. Further, in the distribution electrode for a power distribution device according to the second invention, a mica plate is bonded to at least one surface of the discharge part of the distribution electrode using a silicone resin adhesive. [Function] In the first and second aspects of the present invention, the plate-like member or mica temporary fixed to at least one surface of the discharge section suppresses the generation of sonic radio waves accompanying the discharge, and also stabilizes the discharge part. A discharge of 100% is obtained. [Embodiment] Hereinafter, an embodiment of the first invention will be described with reference to FIGS. 1 and 2. In FIG. 1, the distribution electrode (3) has an inclined surface (3a) and a jagged front edge (3b) in the discharge part.
is formed and has a horizontal structure to stabilize the discharge, and plate-like members (8>) are fixed to both sides of the discharge part.The plate-like members (8> , is made by molding mica flakes (9) with epoxy resin (10). In the electronic wire Ff! (3) manufactured as described above, the plate-shaped member (8) suppresses the generation of noise radio waves. and peak detection (SA
Measurement of 'jtl sound radio waves and quasi-peak detection (
We were able to confirm that the noise radio wave suppression effect was remarkable in both measurements of noise a radio waves using CrSPR). In addition, the above effects could be confirmed by the data obtained by measuring the noise electric field strength at each frequency and determining the auditory sense. In the above embodiment, the plate member (8) was provided on the upper and lower surfaces of the distribution electrode (3), but the plate member (8) may be provided on either of the upper and lower surfaces. Furthermore, silicone resin may be used instead of epoxy resin, and the same effect can be obtained. Furthermore, as shown in FIG. 3, as a plate member (8),
A similar effect may be obtained by laminating a plurality of synthetic mica sheets (9a) and molding them with resin (10) made of epoxy resin or silicone resin. Next, an embodiment of the second invention is as shown in FIG.
A mica plate (9b) is adhesively fixed to one side (or both sides) of the discharge part of the distribution electrode (3) using a silicone resin adhesive (10a). The electron distribution electrode thus oval has the same effect as the first invention. Furthermore, the first and second inventions have the effect of reinforcing the silicone resin's weakness against electric discharge and the effect of improving the stability of electric discharge. [Effects of the Invention] As is clear from the above description, the first and second aspects of the invention are such that a plate-like member made of mica and resin is fixed to at least one surface of the discharge section, or a mica plate is fixed to silicone resin. Since it is fixed with adhesive, it is possible to suppress noise radio waves while ensuring the stability of discharge.

[Brief explanation of drawings]

第１図はこの発明の第一の発明の一実施例の要部の（ａ
）平面図と（ｂ）側断面図、第２図は第１図における板
状部材の断面図、第３図は第２図のものの変形の断面図
、第４図は第二の発明の要部の側断面図、第５図は従来
の配電器の一部断面側面図、第６図は従来の配電器用配
電子電極の要部の側断面図である．％（１）・・・回転軸、（２）・・・配電子、（３）・
・・配電子電極、（４〉・・・側方電極、〈８〉・・・
板状部材、（９）・・・マイカフレーク、（９ａ）・・
・合成マイカシ一ト、（９ｂ〉・・マイカ板、〈１０）
・・・エポキシまたはシリコン樹脂、（１０ａ）・・・
シリコン樹脂接着剤．なお、各図中、同一符号は同一又
は相当部分を示す．代　　理　　人　　　　　曽　　我　　　道　　照犀１
図（Ｇ）（ｂ）昂５図３，配ｔ＋＋電極８：板楔郁杯用２図扇３図９．フイη７Ｌ−ク１０．Ｌホ゛キシ令ｔｍ９ａＡＥｉイ刀シ一ト昂４図９ｂ：　１イカ仮１０ａ　　：　　’，＋）フ：−ａＲ１事１ｍ’ノ昂６
図４（FIG. 1 shows the main part (a) of an embodiment of the first invention of this invention.
) Plan view and (b) side sectional view, FIG. 2 is a sectional view of the plate member in FIG. 1, FIG. 3 is a sectional view of a modification of the one in FIG. 2, and FIG. FIG. 5 is a partial cross-sectional side view of a conventional power distributor, and FIG. 6 is a side cross-sectional view of the main part of a conventional power distributor electrode. %(1)... Rotating axis, (2)... Electron distribution, (3)...
...Distribution electrode, (4>...side electrode, <8>...
Plate member, (9)...mica flakes, (9a)...
・Synthetic mica sheet, (9b>...mica board, <10)
...Epoxy or silicone resin, (10a)...
Silicone resin adhesive. In each figure, the same reference numerals indicate the same or equivalent parts. Agent Zeng Gado Shohsai 1
Figure (G) (b) 5 Figure 3, arrangement t++ electrode 8: plate wedge 2 Figure 3 Fan 3 Figure 9. Fee η7L-ku10. L boxy command tm 9a AEi sword shot 4 Figure 9b: 1 squid temporary 10a: ', +) F: -aR1 thing 1m' no 6
Figure 4 (

Claims

[Claims]

(1) A distribution electrode provided on a distribution electrode fixed to a rotating shaft that rotates in synchronization with the rotation of the crankshaft, and a plurality of distribution electrodes arranged on the rotation locus of the distribution electrode via a discharge gap. In the distribution electrode for a power distribution device of an internal combustion engine, the distribution electrode includes a plurality of lateral electrodes, on at least one surface of the discharge part.
A distribution electrode for a power distribution device, characterized in that a plate-shaped member made of mica material molded with either epoxy resin or silicone resin is fixed.

(2) A distribution electrode provided on a distribution electrode fixed to a rotating shaft that rotates in synchronization with the rotation of the crankshaft, and a plurality of distribution electrodes arranged on the rotation locus of this distribution electrode via a discharge gap. In the distribution electrode for a power distribution device of an internal combustion engine, the distribution electrode includes a plurality of lateral electrodes, on at least one surface of the discharge part.
A distribution electrode for a power distribution device characterized by a mica plate bonded with a silicone resin adhesive.