Ice maker and a refrigerator including the same

An ice maker comprising:

• a tray that defines an ice chamber;
• a full ice detection lever configured to detect an amount of ice;
• and
• a driving device that is coupled with the full ice detection lever and that is configured to move the tray to a water supply position, an ice making position, and an ice transfer position,
• wherein the driving device comprises:
• a driving motor,
• a cam gear configured to be rotated by the driving motor, the cam gear comprising a shaft, a gear portion that is disposed on an outer surface of the cam gear, a first lever cam that protrudes from an inner surface of the cam gear and that extends along a circumferential direction of the cam gear, and a second lever cam that surrounds the shaft,
• a magnet lever configured to move along and in contact with the first lever cam, the magnet lever comprising a magnet, and
• an operation lever configured to move along and in contact with the second lever cam to thereby move the full ice detection lever, and
• wherein the first lever cam comprises:
• a plurality of cam portions that protrude from the inner surface of the cam gear toward a center of the cam gear and that have different protrusion heights with respect to the inner surface of the cam gear, and
• a plurality of steps that are defined at ends of the plurality of cam portions and that are configured to interfere with the magnet lever.