To perform miniaturization of a device while ensuring performance as the overwind preventing device, improve general purpose usability by utilizing an article on the market, and improve maintainability and reduce cost when a part is replaced.

A shaft 4 is inserted by utilizing a square hole in the central part of a lever 3, and a spring for returning back to a neutral position is provided in the inside of the shaft 4 and a drum with groove 2. A switch on the market is used as an overwind preventing switch, the switch is provided in the periphery of the drum with groove 2, and a tip end part of the lever 3 of the switch is set up in the groove. In a shape of a groove part of the drum with groove 2, first a contact of the switch for an operation circuit is interrupted, next a contact of the switch for a power circuit is interrupted in accordance with a rolling angle amount of the shaft 4.