| 主权项 |
1. A PM stepping motor comprising:
a two-phase stator which includes a first stator and a second stator arranged in an axial direction, wherein each of the first stator and the second stator configures one phase and includes an outer yoke having a plurality of pole teeth, an inner yoke having a plurality of pole teeth, and a coil wound around a bobbin; and a rotor which is rotatably supported inside the two-phase stator, wherein each of the first and second stators is formed with one set of a convex portion and a concave portion Which have an engagement structure, wherein the inner yoke of the first stator and the inner yoke of the second stator are joined while the convex portion formed on the inner yoke of the first stator being engaged with the concave portion formed on the inner yoke of the second stator, *2 wherein each of the outer yoke of the first stator and the outer yoke of the second stator is formed with a cutout through which a terminal formed integrally with the bobbin protrudes outside, wherein each of the inner yoke of the first stator and the inner yoke of the second stator is formed at an outer peripheral edge thereof with two protrusions which are engaged with the cutout of the outer yoke of the corresponding one of the first stator and the second stator, and wherein positions of the convex portion and the concave portion of the inner yokes of the first and second stators are arranged in a line symmetrical relationship with respect to a center line passing through a center point of the inner yokes and a center position between the two protrusions, and an angle θ formed between each of the positions and the center line is in the range of 30°<θ<90 °. |
