| 摘要 |
A stepping motor is provided to increase an output torque of the motor by fixing a magnet on a back yoke which is fixed on a cross-section formed on an outer periphery of a lead screw. A stepping motor includes a bracket(110), a housing(120), a stator, a lead screw(170), a back yoke(185), and a rotor. The housing is coupled with the bracket. The stator includes a bobbin, a coil, and tooth yokes. The bobbin is implemented in the housing. The coil is wound around the bobbin. The tooth yoke is inserted into an inner surface of the bobbin. One end of the lead screw is supported on the housing, while the other end thereof is rotatably implemented on the bracket. The back yoke is fixed on an outer periphery of the lead screw which is implemented in the housing. The rotor is fixed on an outer periphery of the back yoke. The rotor is rotated by an interaction between the rotor and the stator.
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