Improvements in control units

Details Improvements in control units Improvements in control units

E - Fixed Constructions

06

B

E06B 9/56 (2006.01) E06B 9/32 (2006.01) E06B 9/42 (2006.01)

Patent

CA 2440695

A control unit for use in a window blind head rail assembly comprises a sprocket wheel, a sprocket support and wrap spring, a chain guard housing which is capable of rotating relative to an external face of the sprocket support, a splined bush for engagement with the roller blind tube and a centre pin. According to another embodiment, a control unit for use in a window blind head rail assembly comprises a sprocket wheel, a sprocket support and wrap spring, a chain guard housing comprising one or more lugs extending perpendicular to the face of the control unit which incorporates the sprocket support, a splined bush for engagement with the roller blind tube, and a centre pin.

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