| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a driving gear and to achieve precise positioning of a lens or a quantity-of-light adjusting member by the driving gear. SOLUTION: This drive gear comprises a first rotor 1 that has a magnet; a first coil 2; a first magnetic pole portion 3a (3c: not shown) that gives torque to the first rotor by being excited by the first coil; a second rotor 7 that has another magnet; a second coil 8; a second magnetic pole portion 9a (9c: not shown) that gives torque to the second rotor by being excited by the second coil; lead screw members 13, 14 that, arranged between the first and second rotors, connect a rotating shaft of the first rotor and that of the second rotor. COPYRIGHT: (C)2005,JPO&NCIPI
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