Cam device

摘要

A cam device comprises a cam, a follower and elastic means for causing the follower to follow the cam. The cam is in the form of a disk and has in a side surface thereof a cam groove having opposite open ends at the outer periphery of the cam. The cam outer periphery has a portion interconnecting opposite ends of a cam groove-defining inner side face which serves as a cam contour face. The follower carries a roller which fits in the cam groove and moves into contact with the cam contour face. The roller can be retained as positioned in contact with or away from the cam contour face.