Motor and electronic device using same

An electronic device comprising a main unit casing, a driven unit provided inside the main unit casing, and a motor connected to the driven unit via a coupling mechanism, wherein the motor comprising:

• a stator having a plurality of magnetic poles disposed at first predetermined intervals along an outer periphery thereof;
• and
• a rotor having a permanent magnet with poles magnetized alternately to have different polarities at second predetermined intervals and disposed rotatably around the outer periphery of the stator with a predetermined gap, further wherein:
• the magnetic poles of the stator have laminated bodies formed by stacking sheet-like plates,
• the laminated bodies have magnetic polar bases and extended portions formed in a manner to bend from the magnetic polar bases into a direction generally parallel to the permanent magnet,
• the extended portions are provided individually at both sides of the magnetic polar base,
• a total extending length of the extended portions at both sides in a direction parallel to the permanent magnet is set not to exceed a length of the magnetic polar base in the direction parallel to the permanent magnet, and
• the extended portions are formed of a high-permeability magnetic steel sheet with silicon content within a range of 1.0 wt-% to 3.0 wt-%.