Patent ID: 8595868

Claim:
An air suction device for a toilet drain passage, which sucks air from a toilet drain passage connected to a downstream side of a water sealing section of a toilet body, the air suction device comprising: a suction tank provided with a first diaphragm which is placed in a housing so as to be vertically movable at an installed position, the suction tank being partitioned by the first diaphragm into an upper first chamber and a lower second chamber which communicates with the toilet drain passage; and an electromagnetic drive device which moves the first diaphragm upward, wherein; the electromagnetic drive device has a cylindrical case body installed away from the suction tank and extending vertically at an installed position, a moving member which is housed in the case body so as to be vertically movable, and a moving device provided on a lower end of the case body; the moving device has a casing and an actuator which is assembled in the casing to move the moving member; the case body is provided with a first airtight chamber surrounded by the moving member and the moving device in the case body, the first airtight chamber having a cubic capacity that is changed by movement of the moving member and communicating via a communication conduit with the first chamber; and the first airtight chamber sucks air in the first chamber to move the first diaphragm upward.