Ignition switch device

An ignition switch device disposed in a driver's seat of an industrial machine to start and stop an engine of the industrial machine, the ignition switch device comprising:

• a switching means having a key hole allowing a regular ignition key to be inserted thereinto, and capable of being rotationally operated in a predetermined direction with the inserted ignition key to start and stop the engine of the industrial machine;
• a case covering the switching means and formed with an insertion hole allowing the key hole to face the outside;
• a shutter disposed on the surface of the case, and 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 protruding portion formed within the range of rotation of the shutter and protruding from the surface of the case, whose protruding end being contact with a rear surface of the shutter while the shutter rotates.