Patent ID: 6918424
Filing Date: 2005-07-19
Classification: E06B

Abstract:
1. A cord winding device for a blind comprising: a cord adapted to lift and lower the blind; a winding screw which is rotatable for winding and unwinding said cord, said winding screw having a screw thread portion; a guide body sleeved on said winding screw, said guide body and said winding screw making an axial movement relative to each other upon rotation of said winding screw, said guide body including an inner thread threadedly engaging said screw thread portion, and a cord-pulling member formed with a hole; a casing for receiving said winding screw; a rotating shaft mounted within said casing to support and rotate said winding screw; and a bracket mounted fixedly within said casing and having a pair of axially spaced-apart connecting plates, said winding screw being limited between said connecting plates; wherein said cord passes through said hole and has one end fixed to said winding screw, said cord being pulled by said cord-pulling member to be wound up around said screw thread portion upon rotation of said winding screw, and wherein said winding screw further includes two annularly grooved parts proximate to said first and second ends, said connecting plates having apertures to receive respectively said grooved parts.