H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/132, 310/66
H02K 16/02 (2006.01) H02K 1/17 (2006.01) H02K 5/14 (2006.01) H02K 5/16 (2006.01) H02K 5/167 (2006.01) H02K 16/00 (2006.01) H02K 23/04 (2006.01)
Patent
CA 1162968
38/SO1503 S81P204 ELECTRIC ROTATING MACHINE ABSTRACT OF THE DISCLOSURE An electric rotating machine can be constructed by mass production techniques, can sustain large axial loads, and can be formed out of a portion of the chassis of a portable electronic device. The electric rotating machine, which can be a duplex micromotor, comprises a base plate, at least one rotor assembly each including a rotor shaft, a rotor magnet disposed on the shaft and having radial pole faces, a pair of bearings supporting opposite ends of the shaft, and a worm, spur gear, or other such element situated on the shaft. A field yoke is favorably formed as a box-like structure of magnetic material with a field magnet therein having pole faces facing radially towards the rotor magnet. The field yoke has an open side mating with the base plate. Upstand- ing ears are formed on the base plate to seat the rotor bearings when the latter are inserted therein in an assembly direction perpendicular to the axis of the rotor shaft. Preferably, to facilitate automated assembly, the maximum diameter of the rotor magnet is smaller than the minimum axial distance parallel to the base plate separating the opposite magnetic pole faces of the field magnet. To better support axial loads, the bearings are preferably pivot bearings. -i-
392377
Gowling Lafleur Henderson Llp
Sony Corporation
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