Control units

Details Control units Control units

E - Fixed Constructions

06

B

E06B 9/42 (2006.01) E06B 9/56 (2006.01)

Patent

CA 2520781

A control unit for use in a window blind head rail assembly including a system of transfer gears coupled to a driving member, the transfer gear system comprising a rotatable inner ring gear; one or more intermediate gears having fixed positions relative to the sprocket support and being rotatable about their own axes; a rotatable outer ring gear connected to a driven member; wherein rotation of the inner ring gear causes rotation of the one or more intermediate gears about their own axes, which causes rotation of the outer ring gear. The driving member has a driving pulley so that force applied to the driving member will cause rotation of the driving pulley and then the gears. A sprocket support and braking means to prevent the control unit from rotating other than in response to force applied via the driving member are also essential as is a splined brush.

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