Speed governing switch of extra quality variable speed board

The utility model provides a speed governing switch of extra quality variable speed board, its install one in the speed governing switch main part two direction switch, two direction switch's intermediate position is equipped with a two direction switch lug, the handle lower extreme install one in the speed governing switch main part the unit of plastic, unit of plastic one end with the two direction switch cooperation, the ascending one side of unit of plastic with the handle cooperation, a fine setting knob is installed to handle one end, speed governing switch main part comprises foundatinplate, resistance strip, components and parts in the speed governing switch main part are installed on the foundatin plate, be equipped with a fretwork on the foundatin plate, the utility model discloses simple structure increases genial stop device in speed governing switch main part, make backward can all accomplish fine setting and spacing location with forward work, utilizes the drawback of foundatin plate that PCB ma