Patent ID: 6880161

Claim:
A cam structure comprising: a first follower section: a first cam for displacing the first follower section in a radial direction, the first cam having divided segments defining at least three arcuate surfaces with different radiuses and sloped connection surfaces that connect the arcuate surfaces, each of the sloped connection surfaces extending in a predetermined rotation angle range that gives pressure angles in a specified range with respect to the first follower; a second follower section that engages and rotates with the first cam, the second follower section having at least three support pins; and a second cam that displaces the second follower section in an axial direction, the second cam having cam sections, each of the cam sections being divided in the radial direction in a number corresponding to the number of the support pins, wherein the divided cam sections are arranged in a circumferential direction at locations that time displacements in the axial direction of the second follower section with displacements in the radial direction of the first follower section.