Patent ID: 7279815

Claim:
A swing motor, comprising: a rotor that is rotated by a magnetic field, a lower portion of the rotor having an archiform shape; a stator, comprising an asymmetric opening, that rotates the rotor in right or left directions at a predetermined angle, and which is provided with a plurality of salient poles at the opening; coils, wound around the plurality of salient poles, that generate the magnetic field when an electric current is applied thereto; and a spiral spring, connected to the rotor, that returns the rotor to an initial position, wherein the plurality of salient poles extend toward the rotor and are disposed above a rotation center of the rotor such that the opening is asymmetrically formed in a direction across a horizontal axis passing through the rotation center of the rotor, a concave portion is recessed in a lower portion of the stator, and the lower portion of the rotor extends into the concave portion.