US Patent 7591159 Ignition switch device

An ignition switch device is provided with a switch having a key hole, and capable of being rotationally operated in a predetermined direction with an ignition key inserted to start and stop the engine of an industrial machine, a case covering the switch and formed with an insertion hole allowing the key hole to face the outside, a shutter rotatable between a closed position where the insertion hole of the case is closed, and an open position where the insertion hole is opened to allow the key hole to face outside, and a gutter formed on the surface of the case, and extending toward an outer end of the case while a base end communicates with the insertion hole.