| 摘要 |
The motor drive for a patio umbrella is a motorized accessory for raising and lowering a patio umbrella. The motor drive for a patio umbrella has an electric motor contained within a housing mounted to the sliding hub, or to the pole, of a patio umbrella. A spool is fixed on the motor's shaft, and a thin cord is taken up by, or unwound from, the spool as the motor is operated in forward or reverse directions. The cord is fastened to the patio umbrella so that, as the cord is taken up by the spool, the umbrella opens. As the cord unwinds from the spool, the umbrella closes. A control circuit operates the motor automatically in response to a photosensor or a remote control signal, or manually by a simple three-position switch.
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