PROBLEM TO BE SOLVED: To provide a game machine button switch device that can not only control vertical motions between a position projecting from the exterior face of the game machine body and a position drawn into the game machine but also has durability to game player's excessive push-down power in conjunction with the content of a rendition and the like of the game machine.;SOLUTION: An axial travel vector "UV1" and a travel stop vector "DV1" in the opposite direction as a reaction of the axial travel vector "UV1" are generated on the same tangential line "TL." Both vectors effect to offset each other. In addition to the work to stop rotation of a travel lock gear 215, an operation to stop the axial travel of the center axis "CA" of the travel lock gear 215 on the orbit "OR" works. Even if excessive depression power is added by a game player, these extra rotations of gears can be prevented and influence of overload to a drive part can be decreased more effectively.;COPYRIGHT: (C)2011,JPO&INPIT
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