E - Fixed Constructions – 06 – B
Patent
E - Fixed Constructions
06
B
E06B 9/322 (2006.01)
Patent
CA 2385095
A friction transmission mechanism for a blind is constructed to include a driving unit, and at least one cord roll-up unit controlled to the driving unit to lift/lower or tilt the slats of the motor-driven Venetian blind. Each cord roll-up unit includes an amplitude modulation wheel controlled by the driving unit to lift/lower the slats and bottom rail of the Venetian blind, a frequency modulation wheel for rotation with the amplitude modulation set to tilt the slats of the Venetian blind, spring means, which forces the frequency modulation wheel into friction-engagement with the amplitude modulation wheel, and a support supporting the amplitude modulation wheel, the support having a shoulder adapted to act with a protruding block of the frequency modulation wheel and to further limit angle of rotation of the frequency modulation wheel.
Lui Song-He
Wen Yu-Che
Industrial Technology & Research Institute
Mcfadden Fincham
Nien Made Enterprise Co. Ltd.
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