| 摘要 |
In order for a conduction path to have a reduced number of sliding portions for conduction, without increase in inductance nor resistance, thereby permitting an enhanced accuracy of inspection, a pair of plungers ( 3, 4 ) biased in opposite directions by a coil spring ( 2 ), to be electrically connected to a wiring plate ( 10 ), have electrical connections in which, in a tubular portion ( 15 ) as a tight wound spiral portion ( 15 a) fixed on one plunger ( 4 ) to allow linear flow of electrical signal, the other plunger ( 3 ) is brought into slidable contact. |
