| 摘要 |
PROBLEM TO BE SOLVED: To obtain a movable armature that is made from plastic conductive body and is applied with a high pressure by normal operation only and has a high electric conductivity. SOLUTION: A pushing assist member 15 is mounted between a movable armature 16 made from plastic conductive body and an operating member 13, and the pushing assist member 15 is more rigid than the movable armature 16 and has a protrusion 17 at side opposing to the movable armature 16 correspondingly to a fixed armature 12, thus when the movable armature 16 is contacted to the fixed armature 12 by pressing the operating member 13, a load by the protrusion 17 of the pushing assist member 15 more rigid than the movable armature 16 is concentrically applied on the movable armature 16, so that a greater pressure is applied to the movable armature 16.
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