Patent ID: 8203245

Claim:
A motor rotor comprising: a rotor yoke; a plurality of magnet fixing sections formed on a peripheral surface of the rotor yoke; a plurality of segment magnets respectively fixed to the magnet fixing sections and extending in an axial direction of the rotor yoke, wherein each of the segment magnets has a fixing flat surface to be fixed to the magnet fixing sections, an outer surface located and extending opposite the fixing flat surface, and side surfaces joining the fixing flat surface and the outer surface; and a plurality of projections provided on the rotor yoke at each boundary section located between each of the adjacent magnet mounting sections and which protrude outward from the rotor yoke, wherein the projections are provided at each axial end of the rotor yoke and are not provided between the axial ends of the rotor yoke, and wherein a pair of end claws are formed by bifurcating the end of each projection into two prongs, and each of the end claws is locked to the outer surface of each of the segment magnets, wherein each of theprojections is spaced from the side surfaces of the segment magnets to which the end claws thereof are locked and does not engage any part of the side surfaces of the segment magnets to which the end claws thereof are locked, whereby a clearance is formed between the respective projections and the entirety of the side surfaces of the segment magnets to which the end claws thereof are locked.