| 摘要 |
A stepping motor is provided to increase torque and to reduce magnetic reluctance by increasing a magnetic flux area through a cylindrical yoke. A rotor(190) is fixed in a rotation axis(180). A first terminal unit(160) is arranged in one side of the rotor. The external power supply is applied to the first terminal unit. A first coil(150) is combined in the first terminal unit. A first outer yoke(130) is arranged in the outer side of the circumference direction of the first coil and the rotor in order to form an outer magnetic pole. The first outer yoke is arranged in an inner part of the circumference direction of the first coil to increase the magnetic flux area. At least one of first and second cases is coupled in a case insertion groove of a first terminal unit. First and second bearings are coupled in the first case and the second case respectively. The rotation axis is rotatably supported by the first and second bearings.
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