| 主权项 |
1. A cord-winding device for a window blind, comprising:
a base unit including a base that extends along a longitudinal direction and that defines a slide channel, said base having a bottom surface configured to removably abut against the window blind, said slide channel extending along the length of said base; and a first adjustment unit including
two first slide seats mounted in said slide channel and slidable toward or away from each other along the longitudinal direction,two sets of first pulleys mounted respectively and rotatably on said first slide seats,at least one first elastic unit disposed on one of said first slide seats, anda first adjustment cord winding around said sets of first pulleys and then extending through said base, said first adjustment cord being configured to be connected to the window blind after extending through said base, and being configured to support the weight of the window blind to thereby generate a pulling force to pull said first slide seats; wherein, when said first adjustment cord pulls said first slide seats, said first slide seats move toward each other and pull said at least one first elastic unit so as to generate a resilient restoring force that counteracts the pulling force of said first adjustment cord and achieve a force-balanced state; and wherein, when an external force is applied to the window blind, the force-balanced state is changed for adjusting an extended or retracted length of the window blind. |
