Cam device

摘要

A cam device comprises a cam (11), a follower (12) and elastic means (13) for causing the follower to follow the cam. The cam is in the form of a disk and is formed in a side surface thereof with a cam groove (22) having opposite ends left open 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 (31) and serving as a cam contour face (33). The follower carries a roller (25) fittable in the cam groove and movable into contact with the cam contour face (33). The roller can be retained as positioned in contact with or outward of the cam contour face.