MOTOR

PROBLEM TO BE SOLVED: To provide a motor which can surely prevent the wobbling of a rotating shaft even if there is employed a structure which supports both axial ends of the rotating shaft by using a bearing. SOLUTION: In the output-side bearing 4 of the stepping motor 1, an external peripheral part 25a of a round-bar shaped protruding part 25 of the rotating shaft 20 is axially supported by the internal side face 41a of a round recess 41, and the accuracy of co-axiality with the rotating shaft 20 is high limited in the machining of the external peripheral part 25a. The end face 25b of the round-bar shaped protruding part 25 is constituted of a spherical face, and this spherical face is supported by the bottom 41b of the round recess 41. Since the spherical face consistently contributes to the support in a thrust direction, the wobbling is not caused at the rotating shaft 20 even if the center of the spherical face is displaced from the center of the rotating shaft 20. COPYRIGHT: (C)2008,JPO&INPIT