| 摘要 |
PROBLEM TO BE SOLVED: To provide a geared motor in which a torque limiter operates with no wear, and precision of operation torque is sustained over a long period, and also to provide a door opening/closing device and a refrigerator. SOLUTION: The geared motor comprises: a DC motor 10; and a clutch operating means 6 wherein induction rotator 16 is driven with the magnetic induction force of a ring-like magnet 11b rotating through the DC motor 10. When a load applied to the DC motor 10 increases due to freezing of an opening/closing plate, a rotational speed of the DC motor 10 decreases, and urging force of a spring member 39 overcomes the magnetic induction force to disconnect a first clutch means 5, thus constituting a noncontact torque limiter. COPYRIGHT: (C)2007,JPO&INPIT
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