| 摘要 |
PROBLEM TO BE SOLVED: To cause an oxide metal material, such as tin in a lower layer, to electrically conduct with a mating terminal contact at low resistance by bringing the oxide metal material into contact with the mating terminal contact even where an oxide film is formed on a surface.SOLUTION: A plurality of V grooves 5b are formed at intervals in a surface 5a of a plating layer 5 laid on a surface 3a of a parent material 3 composing a fixed terminal 1. Each V groove 5b has two inclined faces 5c intersecting the direction of load F from a moving terminal 9 disposed in contact with the fixed terminal 1. When load is applied to the inside of the plating layer 5 from the inclined faces 5c by the load F of the moving terminal 9, force that will release this load to the outside of the plating layer 5 is applied to the surface 5a of the plating layer 5. By virtue of this force, a crack 7a tends to occur in an oxide film 7 formed in a portion of a surface 5a. Consequently, tin (Sn) in the plating layer 5 is exposed on a surface of a fixed contact 1 from the crack 7a, and the fixed terminal 1 is electrically connected with the moving terminal 9 at low resistance. |
