Patent ID: 7679231
Filing Date: 2010-03-16
Classification: G03B,H01F,H02K

Abstract:
1. A driving device comprising: a magnet that is formed to have a hollow cylindrical shape and has magnetized sections which are magnetized to have alternately different poles in a circumferential direction thereof; a coil that is wound coaxially with said magnet and is disposed in axially side-by-side relation to said magnet; a stator yoke that is formed of a soft magnetic material and has said magnet and said coil fixed thereto; a rotor yoke that is formed of a soft magnetic material, and has magnetic pole portions formed in opposed relation to said magnetized sections, for being magnetized by said coil, said rotor yoke being supported in a manner rotatable with respect to said magnet, said coil, and said stator yoke, wherein said rotor yoke further comprises an interlock portion for interlocking with an object to be rotated; and a rotation restricting part that limits a range of rotation of said rotor yoke within a predetermined angle.