| 摘要 |
PROBLEM TO BE SOLVED: To enable to realize a simple, easy, reliable and stable mounting work of contact pieces. SOLUTION: It is so structured that a first and a second contact pieces 12, 13 forming contact parts 123, 133 on beam plane parts 122, 132 bent and folded from fixed faces 121, 131 are placed in opposition with the fixed faces 121, 131 fixed on a pedestal 11, and a contact part 114 which comes in contact with the first contact piece 12 almost in parallel with its beam plane part 122 is fitted to the pedestal 11 for preventing it from falling in the direction contrary to the contact part 123.
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