| 摘要 |
PROBLEM TO BE SOLVED: To restrain increase of electric resistance of a movable contact and a fixed contact even under a high-temperature environment at manufacturing or at use. SOLUTION: In the movable contact 39 and the fixed contact 14, the tip parts including at least contact face contacting mating contact are made of an alloy of gold and silver, and the tip part of either of the contacts, for instance, the movable contact 39 contains platinum. Further, the contact faces of the movable contact 39 and the fixed contact 14 made of gold and silver are hardly oxidized, so that increase of electric resistance of the movable contact 39 as well as the fixed contact 14 can be restrained even under a high-temperature environment at manufacturing or at use. According to the tip part of the movable contact 39 containing platinum, dislocation of the contact material accompanied by the contact/separation between the movable contact 39 and the fixed contact 14 and the contact failure arising therefrom are prevented while keeping electric resistance low. COPYRIGHT: (C)2007,JPO&INPIT
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