Patent ID: 9309716
Filing Date: 2016-04-12
CPC Classification: E06B

Claim Text:
1. A transmission mechanism of a window covering, wherein the window covering includes a headrail, a bottom rail, and a covering material between the headrail and the bottom rail, comprising: a first lifting cord set having a first reel and a first lifting cord, wherein the first reel is received in the headrail for rotation, and the first lifting cord has opposite ends fastened to the first reel and the bottom rail respectively; a second lifting cord set having a second reel and a second lifting cord, wherein the second reel is received in the headrail for rotation, and the second lifting cord has opposite ends fastened to the second reel and the bottom rail respectively; and a driving cord set having a cone reel and a control cord, wherein the cone reel is received in the headrail for rotation to drive the first reel and the second reel to synchronously rotate, and the control cord winds around the cone reel and has a section left out of the headrail for manipulation to rotate the cone reel, wherein the driving cord set further has a transmission reel and a transmission cord; the transmission reel has a reel portion, and the cone reel has a cone portion and a reel portion; the transmission cord winds around the cone portion of the cone reel and the reel portion of the transmission reel respectively, and the control cord winds around the reel portion of the cone reel, whereby the first reel and the second reel are driven by the cone reel to synchronously rotate while the control cord is pulled or released.