| 摘要 |
PROBLEM TO BE SOLVED: To provide a stepping motor having large rotational torque and miniaturizing an apparatus on which the motor is mounted. SOLUTION: The stepping motor 44 is provided with first and second stators 72a, 72b disposed on one-end sides of coils 66a, 66b viewed in the direction of a central axis of the coils 66a, 66b. The first and second stators 72a, 72b have first and second saw-tooth stators 74a excited and fully extending around a central axis of a rotor 82, and first and second annular sections 73a, 73b mounted to an exterior of the rotor 82, formed with the first and second stators 74a and guiding magnetic flux from yokes 68, 68a, 68b to the first and second stators 74a. A scale in the direction of a central axis of one annular section 73b is larger than a scale in the direction of a central axis of the other annular section 73a. COPYRIGHT: (C)2007,JPO&INPIT
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