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CORD WINDING STRUCTURE FOR WINDOW BLIND

  • US 20150136892A1
  • Filed: 09/05/2014
  • Published: 05/21/2015
  • Est. Priority Date: 11/20/2013
  • Status: Active Grant
First Claim
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1. A cord winding structure for window blind, comprising a cord winding assembly composed of:

  • a first plate member being provided with a guide rod support bracket unit, which is upward projected from one side of the first plate member, and a first hole set;

    a guide rod being provided with a plurality of holes that radially extend through the guide rod, and being rotatably rested on the guide rod support bracket unit;

    a second plate member being provided with a plurality of pulley sets, which are located on one side of the second plate member facing toward the first plate member, and a second hole set;

    a first shaft having two ends separately engaged with the first and the second hole set to thereby connect to the first and the second plate member;

    a second shaft having two ends separately engaged with the first and the second hole set to thereby connect to the first and the second plate member;

    a first guiding wheel having a first cord receiving groove, a top portion and a first shaft hole; and

    the first shaft hole axially extending through the first guiding wheel and being rotatably fitted around the first shaft;

    a second guiding wheel having a first receiving space and a second shaft hole; and

    the second shaft hole axially extending through the second guiding wheel and being rotatably fitted around the second shaft;

    a first spiral spring being fitted in the first receiving space of the second guiding wheel with an end fixedly connected to the second guiding wheel and another end extended to fasten to the first guiding wheel; and

    a first cord being wound around the guide rod, the pulley sets, and the first cord receiving groove.

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