| 摘要 |
A retractable top cover for covering a roof of a recreational vehicle having opposed side walls and opposed end walls with the roof surmounting the walls. The retractable top cover comprises a flexible top cover stored on a spring-biased roller mounted in an elongated housing mounted on the vehicle roof adjacent to and extending along one of the side walls. A pair of lazy tongs extension mechanisms, one mounted at one end of the housing, extend and retract the flexible top cover. A drive motor is connected to the lazy tongs by a worm screw mechanism.
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