Patent ID: 8905115
Filing Date: 2014-12-09
Classification: E06B

Abstract:
1. A blind cord winder having stopping control, wherein an envelope of the blind cord winder consists of a first compartment and a second compartment jointed together, the blind cord winder comprising: a spool installed inside the first compartment, wherein a shaft cavity is formed at a side of the first compartment; a force-feedback mechanism installed inside the shaft cavity, the force-feedback mechanism including a shaft sleeve and a volute spring, wherein one end of the volute spring is connected to the shaft sleeve and the other end of the volute spring is fastened at the first compartment to provide a reposition elastic force for the shaft sleeve; and a braking cushion mechanism installed inside the second compartment, the braking cushion mechanism including a friction ring, a friction spring, and a trigger sleeve, wherein the friction ring with a wear-resistant annular inwall is immovably installed inside the second compartment, and the friction spring is tightly plugged into the wear-resistant annular inwall and has an extruded end for the trigger sleeve to trigger friction variation between the friction spring and the friction ring to have an adjustable fiction of the friction spring in a single directional rotation of the trigger sleeve when the trigger sleeve is in contact with an inner side of the extruded end along a spiral direction of the friction spring.