| 摘要 |
<p>A retractable motor-driven awning (12, 112) can be extended or retracted by energizing the motor (48, 148) in one direction or another. A manually operable system, however, is also employed for rotating the awning (12, 112) by hand in a direction to retract the awning (12, 112) in the event the motor drive becomes inoperable. The ability to hand rotate the roll bar (24, 124) to retract the awning (12, 112) is achieved by connecting the roll bar (24, 124) to the drive shaft (50, 150) of the motor (48, 148) with a manual override system. Implementations of a manual override mechanism include one-way bearings (58) and various ratchet designs (86, 110).</p> |
