Patent ID: 7984745
Filing Date: 2011-07-26
Classification: E06B

Abstract:
1. A cordless window blind structure, comprising: a head rail, having a predetermined opening structure and a predetermined length; a first positioning element, fixed within the head rail at one side corresponding to the orientation of a longitudinal axis of the head rail thereof and spaced apart by a certain distance from a first end of the head rail; a movable seat, movably disposed within the head rail, wherein the movable seat has a pulley block disposed at one side in proximity to the first positioning element and has a cord-winding assembly disposed on the other side thereof; a blind body, disposed beneath the head rail; at least one lift cord, having one end wound between the movable seat and the first positioning element, and of which the other end extending therebetween the head rail and lower portions of the blind body; and a retrieving cord, wherein one end of the retrieving cord is attached to the cord-winding assembly, and of which the other end is either fastened to a predetermined position thereon the head rail; or is subsequently fixed upon the movable seat after being routed through the predetermined position, and a predetermined distance is formed therebetween the second end of the head rail and the predetermined position, wherein the cord-winding assembly has a cord winder and at least one torsion spring, one end of the retrieving cord is attached to the cord winder constructed and arranged to engage with the torsion spring so as to counter-wind or recoil the retrieving cord accordingly.