JPH0332844B2 - - Google Patents
Info
- Publication number
- JPH0332844B2 JPH0332844B2 JP18629083A JP18629083A JPH0332844B2 JP H0332844 B2 JPH0332844 B2 JP H0332844B2 JP 18629083 A JP18629083 A JP 18629083A JP 18629083 A JP18629083 A JP 18629083A JP H0332844 B2 JPH0332844 B2 JP H0332844B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- resistance
- transfer
- electrical contacts
- combination
- 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
- 229910017937 Ag-Ni Inorganic materials 0.000 claims description 8
- 229910017984 Ag—Ni Inorganic materials 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 6
- OYJSZRRJQJAOFK-UHFFFAOYSA-N palladium ruthenium Chemical compound [Ru].[Pd] OYJSZRRJQJAOFK-UHFFFAOYSA-N 0.000 description 6
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 229910002835 Pt–Ir Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Contacts (AREA)
Description
本発明は組み合わせ電気接点の改良に関する。
近時、電気、電子技術の発展に伴い各種電気、
電子機器が小型化され、それに応じてリレースイ
ツチ等が小型化されている。
然し乍ら、リレー、スイツチ等が小型化される
と、沿面距離や絶縁距離がとりにくくなる。つま
り絶縁抵抗や耐電圧の劣化を招くという問題が生
じる。また電気接点の接触力、開離力が小さくな
り、接点間距離が狭くなり、溶着や移転によるロ
ツキングが起き易くなるという問題が起こる。こ
のため耐溶着性、耐移転性に優れた組み合わせ電
気接点が要望され種々の組み合わせ電気接点の開
発がなされているが今だ満足すべきものがない。
一般的にはAg系同志の組み合わせ電気接点よ
りも一方をAg系相手側をAg系ではなくPt族系に
した組み合わせ電気接点の方が耐移転性にすぐれ
ロツキングの発生も少ない。
例えば、Ag−PdとAg−CdO又はAg−Niとの
組み合わせよりもAg−PdをPd−Ru、Pt−Ir、
Pd、Ptなどにかえた方が耐移転性がすぐれてい
る。この理由としてAgをベースとした材料の融
点、沸点はAgのそれでほとんど決つてしまうた
めPd−Ru、Pt−Ir、Pd、Ptよりも劣ることと、
Agを主成分とした材料同志の場合移転を生じた
あとも主成分が同じ材料ゆえ溶融し、固溶しやす
く最終的にはロツキングが発生しやすくなること
があげられる。それゆえ移転→ロツキングに強い
材料の組み合わせ電気接点として、Pd−Ru系対
Ag−CdO系又はAg−Ni系の組み合わせ電気接点
があげられ、その組成としてはPd−Ru10％、Ag
−CdO10〜15％、Ag−Ni10〜20％が多用されて
いる。最初に述べたようにリレー、スイツチ等の
小型化により移転→ロツキングに対して強い組み
合わせ電気接点が望まれている。本発明はこの点
に注目してなされたものであり、消耗により凹と
なる方に熱的に非常に安定なMoを一方相手側に
はAg−CdO系又はAg−Ni系等のAgを基材とし
た材料との組み合わせることを特徴としたもので
ある。
本発明の組み合わせ電気接点に於いて、上記の
如く相対向する接点の材料を限定した理由は、
Pd−Ru10％は融点1580℃に対しMoは2620℃と
高くアーク熱により生じる移転、消耗に強いこと
があげられる。ただしMoは酸化しやすいため両
方に使用すると耐移転性は非常に高くなるが接触
抵抗値が高くなるため一方は通常通り電気伝導度
の最も高いAgを主体としたAg−CdO系やAg−
Ni系を使用する必要がある。なお、リレー、ス
イツチ等の機構の問題で本発明にて接触抵抗値が
高くなる場合はMo上に5μｍ以下のAgめつきを施
し使用すればよい。Agめつき厚が5μｍを超える
と、耐移転性が低下してくるので5μｍ以下が好
ましい。
次に本発明による組み合わせ電気接点の効果を
明瞭ならしめる為に具体的な実施例と従来例につ
いて説明する。
実施例 １
Ni10重量％を含むAg−Niより成る5φmmの固定
接点とMoより成る4φmmの可動接点とを相対向さ
せて組み合わせ電気接点を構成した。
実施例 ２
Cd11重量％を含むAg−CdOより成る5φmmの固
定接点とAgめつき2μｍを施したMoより成る4φ
mmの可動接点とを相対向させて組み合わせ電気接
点を構成した。
従来例
Ni10重量％を含むAg−Niより成る5φmmの固定
接点とPd−Ru10％より成る4φmmの可動接点とを
相対向させて組み合わせ電気接点を構成した。
然してこれら各組み合わせ電気接点を下記の試
験条件にて移転によるロツキング発生有無及び接
触抵抗の測定を行つた。
DC 12V 10A
負荷 抵抗
開閉頻度 65回／分
開閉回数 20万回
接触力 110ｇ
開離力 80ｇ
可動接点 陽極
固定接点 陰極
The present invention relates to improvements in combination electrical contacts. Recently, with the development of electrical and electronic technology, various electrical
Electronic devices are becoming smaller, and relay switches and the like are becoming smaller accordingly. However, as relays, switches, etc. become smaller, it becomes difficult to maintain sufficient creepage distance and insulation distance. In other words, a problem arises in that insulation resistance and withstand voltage deteriorate. In addition, the contact force and separation force of the electrical contacts become smaller, the distance between the contacts becomes narrower, and locking due to welding or transfer becomes more likely to occur. For this reason, there is a demand for a combination electrical contact with excellent welding resistance and migration resistance, and various combination electrical contacts have been developed, but so far none has been satisfactory. In general, a combination electrical contact in which one side is Ag and the other side is Pt group rather than Ag type has better transfer resistance and less occurrence of locking than a combination electrical contact in which Ag is used. For example, Ag-Pd is better combined with Pd-Ru, Pt-Ir, than Ag-Pd with Ag-CdO or Ag-Ni.
Changing to Pd, Pt, etc. has better transfer resistance. The reason for this is that the melting point and boiling point of Ag-based materials are almost determined by those of Ag, so they are inferior to Pd-Ru, Pt-Ir, Pd, and Pt.
In the case of materials containing Ag as the main component, even after the transfer occurs, because the main components are the same, they tend to melt and form a solid solution, eventually causing locking. Therefore, Pd-Ru based electrical contacts can be used as electrical contacts combining materials that are resistant to transfer and locking.
Ag-CdO system or Ag-Ni system combination electrical contacts are mentioned, and their composition is Pd-Ru10%, Ag
-CdO 10-15% and Ag-Ni 10-20% are often used. As mentioned at the beginning, due to the miniaturization of relays, switches, etc., there is a desire for combination electrical contacts that are resistant to transfer and locking. The present invention was made with attention to this point, and the one that becomes concave due to consumption is thermally very stable Mo, while the other side is Ag-based such as Ag-CdO or Ag-Ni. It is characterized by its combination with other materials. In the combined electrical contact of the present invention, the reason why the materials of the opposing contacts are limited as described above is as follows.
Pd-Ru 10% has a melting point of 1580℃, while Mo has a melting point of 2620℃, making it resistant to transfer and consumption caused by arc heat. However, Mo is easily oxidized, so if it is used for both, the transfer resistance will be very high, but the contact resistance will be high.
It is necessary to use Ni-based material. In addition, if the contact resistance value becomes high in the present invention due to problems with mechanisms such as relays and switches, it is sufficient to use Ag plating of 5 μm or less on Mo. When the Ag plating thickness exceeds 5 μm, transfer resistance decreases, so it is preferably 5 μm or less. Next, specific embodiments and conventional examples will be described in order to clarify the effects of the combined electrical contact according to the present invention. Example 1 An electric contact was constructed by combining a 5φmm fixed contact made of Ag-Ni containing 10% by weight of Ni and a 4φmm movable contact made of Mo to face each other. Example 2 Fixed contact of 5φmm made of Ag-CdO containing 11% by weight of Cd and 4φ made of Mo with Ag plating of 2μm
A movable contact of mm was made to face each other to form an electric contact. Conventional Example An electric contact was constructed by combining a 5 mm fixed contact made of Ag-Ni containing 10% Ni by weight and a 4 mm movable contact made of 10% Pd-Ru facing each other. Therefore, the occurrence of locking due to transfer and contact resistance were measured for each of these combinations of electrical contacts under the following test conditions. DC 12V 10A Load Resistance switching frequency 65 times/min Switching/closing frequency 200,000 times Contact force 110g Opening force 80g Movable contact Anode fixed contact Cathode
【表】
上記表で明らかなようにMoとAg−Ni又はAg
めつきを施したMoとAg−CdOの組み合わせ電気
接点は従来格別に耐移転性に優れたPd−RuとAg
−Niの組み合わせ電気接点よりもさらに優れて
おり、接触抵抗は同等であることがいえる。
以上詳記した通り本発明の組み合わせ電気接点
は耐移転性にすぐれているため、ロツキングの発
生を抑えることができる。[Table] As is clear from the table above, Mo and Ag−Ni or Ag
Plated Mo and Ag-CdO combination electrical contacts are conventionally made with Pd-Ru and Ag, which have exceptional transfer resistance.
It can be said that this is even better than the -Ni combination electrical contact, and that the contact resistance is the same. As described in detail above, the combined electrical contact of the present invention has excellent transfer resistance, so that it is possible to suppress the occurrence of locking.
Claims (1)
の接点とを相対向させて成る組み合わせ電気接
点。 ２ Mo接点と、Cd10〜17重量％を含むAg−
CdO系の接点とを相対向させて成る組み合わせ電
気接点。 ３ 特許請求の範囲第１項又は第２項において、
Mo接点に5μｍ以下のAgめつきを施したことを特
徴とする組み合わせ電気接点。[Claims] 1. A combination electrical contact consisting of a Mo contact and an Ag-Ni contact containing 5 to 20% by weight of Ni, facing each other. 2 Mo contact and Ag- containing 10-17% by weight of Cd
A combination electrical contact consisting of CdO type contacts facing each other. 3 In claim 1 or 2,
A combination electrical contact characterized by Mo contact with Ag plating of 5μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18629083A JPS6079619A (en) | 1983-10-05 | 1983-10-05 | Combination electric contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18629083A JPS6079619A (en) | 1983-10-05 | 1983-10-05 | Combination electric contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6079619A JPS6079619A (en) | 1985-05-07 |
| JPH0332844B2 true JPH0332844B2 (en) | 1991-05-15 |
Family
ID=16185720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18629083A Granted JPS6079619A (en) | 1983-10-05 | 1983-10-05 | Combination electric contact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6079619A (en) |
-
1983
- 1983-10-05 JP JP18629083A patent/JPS6079619A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6079619A (en) | 1985-05-07 |
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