Manual roller shade having clutch mechanism, chain guide and universal mounting

摘要

A manual roller shade includes a clutch mechanism having a gear train transferring rotation of an input sprocket to rotation of an output member engaging a roller tube. The gear train includes a sun gear, planet gears supported by a carrier and engaging the sun gear, and a ring gear engaging the planet gears. According to one embodiment, the carrier does not rotate. The ratio between the diameters of the input sprocket and the roller tube is selected to offset mechanical advantage of the gear train to provide an effective gear train ratio of approximately 2:1. A drive chain guide system includes spaced guide wheels controlling where a drive chain is suspended from the manual shade. A roller shade mounting system includes a bracket receiving either an input assembly of the manual roller shade or a motor of a motorized roller shade to facilitate conversion.