To surely prevent a liquid from intruding into an electrical connection port in a socket for the liquid to which a plug body equipped with a plug part for fluid passage connection and a terminal for electrical connection is detachably fitted, and in particular in the socket for the liquid equipped with fluid connection ports to which the plug part is detachably connected and an electrical connection port to which the terminal is inserted accompanying the connection of the plug part.
The electrical connection port is constituted by slit parts 31, 32 and 33 formed on an elastic body. The slit parts 31, 32 and 33 are set in a size to which the terminal can be tightly inserted, and are always energized to a closed direction by elastic restoring force of the elastic body when the terminal is not inserted.
OGAWA MASAHIRO
FUJIKI KENJI
MATSUMOTO YASUHIRO
