| 摘要 |
PROBLEM TO BE SOLVED: To accomplish reduction in the thickness of a motor, minimize the increased number of parts, and prevent a rotor from coming off with certainty. SOLUTION: A coming-off preventive member 30 having an engaging portion 31 which extends outward beyond the inside diameter of a driving magnet 13 in the radial direction is installed on a stator 20. The driving magnet 13 which is a constitution indispensable to driving of a motor is utilized as a coming-off preventive member on the rotor 10 side. The engaging portion 31 of the coming-off preventive member 30 and the upper end face 13a of the driving magnet 13 abut against each other. Thereby, relative movements of the rotor 10 and the stator 20 in the axial direction are controlled.
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