Patent ID: 7304409

Claim:
A driving device comprising: a hollow cylindrical first magnet having a peripheral wall thereof circumferentially divided into sections magnetized to have alternately different poles, said first magnet having an outer peripheral surface and an inner periphery; a first coil disposed coaxial with and adjacent said first magnet and extending axially of said first magnet; a first stator having a magnetic pole part opposed to the outer peripheral surface of said first magnet, the magnetic pole part of said first stator being magnetized by said first coil; a first rotor rigidly fitted in the inner periphery of said first magnet, said first rotor being magnetized by said first coil; a first output member disposed to be driven to a first position or a second position by rotation of said first magnet; a hollow cylindrical second magnet disposed concentric with said first magnet and having a peripheral wall thereof circumferentially divided into sections magnetized to have alternately different poles, said second magnet having an outer peripheral surface and an inner periphery; a second coil disposed coaxial with and adjacent said second magnet and extending axially of said second magnet, said second coil having an inner periphery; a second stator having a magnetic pole part opposed to the outer peripheral surface of said second magnet, the magnetic pole part of said second stator being magnetized by said second coil; a second rotor rigidly fitted in the inner periphery of said second magnet, said second rotor having an inner periphery; and a second output member disposed to be driven to a third position or a fourth position by rotation of said second magnet, wherein said first rotor has a portion thereof inserted in the inner periphery of said second coil and the inner periphery of said second rotor, said portion being magnetized by said second coil.