JPS6160524B2 - - Google Patents
Info
- Publication number
- JPS6160524B2 JPS6160524B2 JP439783A JP439783A JPS6160524B2 JP S6160524 B2 JPS6160524 B2 JP S6160524B2 JP 439783 A JP439783 A JP 439783A JP 439783 A JP439783 A JP 439783A JP S6160524 B2 JPS6160524 B2 JP S6160524B2
- Authority
- JP
- Japan
- Prior art keywords
- silver
- contacts
- plated
- contact device
- tungsten carbide
- 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
- 238000007747 plating Methods 0.000 claims description 14
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 239000004332 silver Substances 0.000 claims description 9
- UYKQQBUWKSHMIM-UHFFFAOYSA-N silver tungsten Chemical compound [Ag][W][W] UYKQQBUWKSHMIM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Contacts (AREA)
Description
【発明の詳細な説明】
この発明は、電気接点装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical contact device.
弱電流用貴金属めつき接点としては、金を用い
た接点が一般的でありさらに長寿命を要する接点
には、ロジウムが用いられている。しかし、ロジ
ウムを用いた接点は高価である（金の約４倍）上
に初期接触抵抗が不安定で、しかも低レベル（例
えば1V〜１ｍＡ）での開閉においてブラウンパ
ウダーと称する絶縁性の粉末を生じて接触障害を
生じるという欠点がある。そして、これらのめつ
き接点は、一般的に直流において使用する場合
に、陽極側から陰極側へ材料の移転を生じ橋絡に
よる溶着によつて開閉が不可能になるという欠点
もある。つぎに金にアルミナ等を分散させた複合
めつき接点は、上述の問題を解決することはでき
るが、この接点は、絶縁物を分散せしめた接点で
あるため開閉時の接触抵抗が不安定という問題が
ある。 Gold is commonly used as noble metal plated contacts for weak currents, and rhodium is used for contacts that require a longer life. However, contacts using rhodium are expensive (approximately 4 times that of gold), have unstable initial contact resistance, and require an insulating powder called brown powder when switching at low levels (for example, 1V to 1mA). This has the disadvantage of causing contact failure. Furthermore, these plated contacts generally have the disadvantage that when used in direct current, material transfer occurs from the anode side to the cathode side, making it impossible to open and close due to welding due to bridging. Next, composite plated contacts, which are made by dispersing alumina, etc. in gold, can solve the above problem, but because these contacts have insulators dispersed in them, the contact resistance during opening and closing is unstable. There's a problem.
したがつて、この発明の目的は、コストが安く
長寿命でしかも接触抵抗が安定な電気接点装置を
提供することである。 Therefore, an object of the present invention is to provide an electrical contact device that is inexpensive, has a long life, and has stable contact resistance.
この発明の弱電流用の電気接点装置は、相対向
する一対の電気接点の一方の表面に銀めつきを施
すとともに他方の表面にタングステンカーバイド
粒子を分散させた銀−タングステンカーバイド複
合めつきを施したことを特徴とする。 The electric contact device for weak current according to the present invention has a pair of electrical contacts facing each other, one surface of which is plated with silver, and the other surface of which is plated with silver-tungsten carbide composite in which tungsten carbide particles are dispersed. It is characterized by
つぎに、実施例について説明する。 Next, examples will be described.
固定側接点に銀めつきを行ない可動側接点に銀
−タングステンカーバイドの複合めつきを行なつ
て電気接点装置を構成した。このときの銀めつき
浴組成およびめつき条件を次に述べる。 An electrical contact device was constructed by silver plating the fixed side contacts and composite plating of silver-tungsten carbide on the movable side contacts. The silver plating bath composition and plating conditions at this time will be described below.
銀めつき浴組成
AgCN 36ｇ／
KCN 60ｇ／
K2CO3 15ｇ／
めつき条件
温度−25℃ 電流密度−1.0A／ｄm2
銀−タングステンカーバイド複合めつきは、上
記組成のめつき浴に、平均粒径0.75μｍのタング
ステンカーバイド粉末を混入して行なつた。この
実施例の電気接点装置を銀めつきのみの接点装置
および銀−タングステンカーバイドのみの接点装
置と対照して開閉試験を行なつた結果を図面に示
す。図面において、曲線Ｄはこの実施例の接点装
置、曲線Ｅは銀めつきのみの接点装置、曲線Ｆは
銀−タングステンカーバイドのみの接点装置の特
性曲線を示す。図面から明らかなように、この実
施例の接点装置は、長寿命で、しかも接触抵抗の
安定性が銀−タングステンカーバイドのみの接点
装置に比べて著しく良好となつている。なお、開
閉試験は、DC20V／Ａ、開閉は抵抗負荷、２Hz
で行なつた。Silver plating bath composition AgCN 36g / KCN 60g / K 2 CO 3 15g / Plating conditions Temperature -25℃ Current density -1.0A/dm 2 Silver-tungsten carbide composite plating is applied to a plating bath with the above composition. This was done by mixing tungsten carbide powder with a particle size of 0.75 μm. The drawings show the results of opening/closing tests conducted on the electrical contact device of this example in comparison with a contact device made only of silver plating and a contact device made only of silver-tungsten carbide. In the drawings, curve D shows the characteristic curve of the contact device of this embodiment, curve E shows the characteristic curve of the contact device with only silver plating, and curve F shows the characteristic curve of the contact device with only silver plating. As is clear from the drawings, the contact device of this embodiment has a long life and the stability of contact resistance is significantly better than that of a contact device made only of silver-tungsten carbide. In addition, the switching test is DC20V/A, switching is resistance load, 2Hz.
I did it at
なお、実施例では、個定側接点に銀めつきを行
ない、可動側接点に銀−タングステンカーバイド
複合めつきを施こしているが、その逆にしても同
様の効果を奏することができる。 In the embodiment, the individual contacts are plated with silver and the contacts on the movable side are plated with silver-tungsten carbide composite plating, but the same effect can be obtained even if the contacts are reversed.
以上のように、この発明の電気接点装置は、弱
電流用として用いる安価なめつき接点において不
可欠のものである接触抵抗の安定性を高め、接点
の信頼性を高めるとともに長寿命化を達成するこ
とができる。また、銀−タングステンカーバイド
複合めつきによりマトリツクス金属の機械的強度
が向上するので貴金属単一のめつき接点装置に比
べて特に直流使用時の移転、橋絡による溶着粘着
障害がなくなる。 As described above, the electrical contact device of the present invention can improve the stability of contact resistance, which is essential for inexpensive plated contacts used for weak currents, improve the reliability of the contacts, and achieve a longer service life. can. Furthermore, since the mechanical strength of the matrix metal is improved by the silver-tungsten carbide composite plating, welding adhesion problems due to transfer and bridging especially when using direct current are eliminated compared to contact devices plated with a single precious metal.
図面はこの発明の実施例の電気接点装置の開閉
試験の結果を示す説明図である。
The drawing is an explanatory view showing the results of an opening/closing test of an electrical contact device according to an embodiment of the present invention.
Claims (1)
めつきを施すとともに他方の表面にタングステン
カーバイド粒子を分散させた銀−タングステンカ
ーバイド複合めつきを施したことを特徴とする弱
電流用の電気接点装置。1. An electric contact for weak current, characterized in that one surface of a pair of electrical contacts facing each other is plated with silver, and the other surface is plated with silver-tungsten carbide composite plating in which tungsten carbide particles are dispersed. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP439783A JPS58131612A (en) | 1983-01-14 | 1983-01-14 | Electric contact unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP439783A JPS58131612A (en) | 1983-01-14 | 1983-01-14 | Electric contact unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58131612A JPS58131612A (en) | 1983-08-05 |
| JPS6160524B2 true JPS6160524B2 (en) | 1986-12-22 |
Family
ID=11583211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP439783A Granted JPS58131612A (en) | 1983-01-14 | 1983-01-14 | Electric contact unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58131612A (en) |
-
1983
- 1983-01-14 JP JP439783A patent/JPS58131612A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58131612A (en) | 1983-08-05 |
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