Patent ID: 9366076
Filing Date: 2016-06-14
CPC Classification: E06B

Claim Text:
1. A cord winding structure for a window blind, comprising a cord winding assembly comprising: 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 first 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 a first hole of each of the first and the second hole set to thereby connect to the first plate member and the second plate member; a second shaft having two ends separately engaged with a second hole of the first and the second hole set to thereby connect to the first plate member and the second plate member; a first guiding wheel having a first cord receiving groove, a top portion and a first shaft hole; the first shaft hole axially extending through the first guiding wheel, the first guiding wheel being rotatably mounted on the first shaft; a second guiding wheel having a first receiving space and a second shaft hole; the second shaft hole axially extending through the second guiding wheel the second guiding wheel being rotatably mounted on 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 first pulley sets, and the first cord receiving groove; wherein the guide rod support bracket unit includes a first guide rod support bracket and a second guide rod support bracket upward projected from one side of the first plate member; the first and the second guide rod support bracket being provided with a first receiving recess and a second receiving recess, respectively; and the guide rod being rested in the first and second receiving recesses; and wherein the guide rod support bracket unit further includes a first slide jacket and a second slide jacket fitted over the first and the second guide rod support bracket, respectively.