| 摘要 |
<p>An actuator comprises: a coil; a permanent magnet rotor which is fixed to the output shaft inside the coil and rotatably supported; a bobbin which is formed with a nonmagnetic material and around which said coil is wound; a first stator which is inserted into from one direction and fixed to said bobbin, and has an inner side magnetic pole section and an outer side magnetic pole section formed respectively extending to the inner side section and the outer side section of said coil along the axial direction of said rotor; and a second stator which is inserted into from a direction opposite said one direction and fixed to said bobbin, and has an inner side magnetic pole section and an outer side magnetic pole section formed respectively extending to the inner side section and the outer side section of said coil along the axial direction of said rotor. The inner side magnetic pole section and the outer side magnetic pole section of said first stator are alternately disposed in the circumferential direction, and the inner side magnetic pole section and the outer side magnetic pole section of said second stator are alternately disposed in the circumferential direction.</p> |
