DRIVE SYSTEM FOR A CORDLESS BLIND

摘要

A drive system for a window treatment blind provides cordless operation of the blind in that the blind may be moved between a retracted position and an extended position without the typical user activation of a lift cord. The drive system includes an actuator with a spring tensioned spool that winds the lift cord as the blind is retracted and unwinds the lift cord as the blind is extended. The drive system eliminates the strangulation hazard to children presented by conventional lift cords.

主权项

1. A blind, comprising:
a top rail having a channel formed therein; a bottom rail; a plurality of slats disposed between the top rail and the bottom rail; a lift cord having a first end operatively attached to the bottom rail and received through an aperture defined through each of the plurality of slats; and an actuator having a spring tensioned spool operatively attached to a second end of the lift cord and adapted for alternately winding and unwinding the lift cord as the blind is moved between an extended position to a retracted position.