Motor and optical disk drive using the same with chamfered and fractured parts on rotor case

Abstract

There are provided a motor capable of preventing scratches from occurring on an outer surface of a rotor case thereof, a method for manufacturing the same, and an optical disk drive using the same. The motor includes a shaft rotatably inserted into a bearing assembly; and a rotor case fixedly fastened to the shaft and rotating together with the shaft, wherein the rotor case is provided with a chamfered part along the outer peripheral edge of the bottom surface thereof. The rotor case includes a rotor hub fastened to an end of the shaft; an extending part extending in an outer-diameter direction from the rotor hub; and a vertical extending part formed to be vertically extended downwardly in a shaft direction from an outer peripheral edge of the extending part and having the chamfered part formed on the bottom end surface thereof.

Dependencies are inferred from the claim text.