Abstract: A power supply line for high-frequency current has a two-layered tubular conductor including an inner tube portion and an outer tube portion which is concentric to the inner tube portion and integrally linked thereto by four connecting portions along the entire length in the longitudinal direction. The four connecting portions are circumferentially disposed at predetermined intervals. By providing the four connection portions between the inner tube portion and the outer tube portion, it is possible to more accurately position the inner tube portion and to reduce high frequency resistance when compared with the likes of conventional power supply lines for high-frequency current having only one connecting portion between an inner tube portion and an outer tube portion.

Abstract: A wiring duct connection device includes a connection body to be inserted into an end portion of a wiring duct having conductors arranged on side walls within an elongated grove-like core along a longitudinal direction; contactors held in the connection body in such a manner that the contactors can protrude from opposite side surfaces of the connection body; and elastic bodies which biases the contactors outward. The elastic bodies are arranged side by side along the longitudinal direction at an inner side of each of the contactors, and each of the contactors includes convex contact portions that are one-piece formed at an outer end thereof, the contact portions being arranged along the longitudinal direction.

Abstract: A wiring duct connection device includes a connection body to be inserted into an end portion of a wiring duct having conductors arranged on side walls within an elongated grove-like core along a longitudinal direction; contactors held in the connection body in such a manner that the contactors can protrude from opposite side surfaces of the connection body; and elastic bodies which biases the contactors outward. The elastic bodies are arranged side by side along the longitudinal direction at an inner side of each of the contactors, and each of the contactors includes convex contact portions that are one-piece formed at an outer end thereof, the contact portions being arranged along the longitudinal direction.

Abstract: A power supply line for high-frequency current has a two-layered tubular conductor including an inner tube portion and an outer tube portion which is concentric to the inner tube portion and integrally linked thereto by four connecting portions along the entire length in the longitudinal direction. The four connecting portions are circumferentially disposed at predetermined intervals. By providing the four connection portions between the inner tube portion and the outer tube portion, it is possible to more accurately position the inner tube portion and to reduce high frequency resistance when compared with the likes of conventional power supply lines for high-frequency current having only one connecting portion between an inner tube portion and an outer tube portion.