| 摘要 |
There is disclosed an improved roller shade control unit having a reduced profile for use with a roller tube and roller chain. The improved roller shade control unit including a tube housing for coupling to the roller tube and a sprocket for coupling the tube housing to the chain. The sprocket has a peripheral edge configured to couple to the chain. A chain guide for keeping the chain coupled to the sprocket is provided, said chain guide comprising a flat member having a bottom and a side, an aperture dimensioned to contain the sprocket being formed on the side. The tube housing has a barrel portion and an extended edge portion projecting radially from an end of the barrel portion, said extended edge portion configured to cover the sprocket, said extended edge portion having at least one cut out dimensioned to permit a portion of the chain to pass there through.
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