| 摘要 |
An improved control mechanism for use in a magnetically operated wheel mainly is made up of an outer cover, an inner housing, a pair of compression springs, two small supporting wheels, two linkage pieces, an externally connected pull cord control mount, a sensor, a signal transmitter mount and an internal or external transmission set. In adjustment, only a motor is activated to make a main transmission device, a secondary transmission device, a driven gear, a restraint unit and a driving wheel rotate in synchronism. Besides, when the driving wheel rotates, a lower gear and the linkage rack of the two pivotal linkage pieces equipped with a plurality of magnets and housed in a flywheel are in mesh engagement with each other to vary the distance between the magnets and the flywheel so as to make the adjustment of braking resistance of the flywheel in a stageless manner.
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