Patent ID: 9331529
Filing Date: 2016-05-03
CPC Classification: H02K

Claim Text:
1. An actuator comprising: a coil; a permanent magnet rotor secured to and rotatably supported by an output shaft inside the coil; a bobbin made of a non-magnetic material and around which the coil is wound; a first stator inserted into and secured to the bobbin in one direction, and including an inner magnetic pole portion and an outer magnetic pole portion extending inside and outside the coil in an axial direction of the rotor, respectively; and a second stator inserted into and secured to the bobbin in a direction opposite to the one direction, and including an inner magnetic pole portion and an outer magnetic pole portion extending inside and outside the coil in the axial direction of the rotor, respectively, wherein the inner magnetic pole portion and the outer magnetic pole portion of the first stator are arranged alternately in a circumferential direction, and the inner magnetic pole portion and the outer magnetic pole portion of the second stator are arranged alternately in the circumferential direction.