Patent ID: 8708023

Claim:
A cordless blind assembly, comprising: an upper frame rod including a first cord winder and a second cord winder disposed at two opposing ends to release and retract a first driving cord and a second driving cord; a retracting rod located beneath the upper frame rod, wherein a plurality of retractable blind shading parts are disposed between the upper frame rod and the retracting rod, wherein a first guiding component is disposed on a first end of the retracting rod and a second guiding component is disposed on a second end of the retracting rod; wherein the first driving cord goes around one side of the blind shading parts to connect to the first guiding component and the second driving cord goes around the other side of the blind shading parts to connect to the second guiding component; a first side guiding rail having a first top end located at one side of the upper frame rod to hide the extended first driving cord with the first guiding component freely moving inside the first side guiding rail; and a second side guiding rail having a second top end located at the other side of the upper frame rod to hide the extended second driving cord with the second guiding component freely moving inside the second side guiding rail; wherein each of the first cord winder and the second cord winder has a stopping control mechanism, wherein the stopping control mechanism includes a spool, a force-return mechanism, and a braking cushion mechanism, wherein the spool is accommodated inside a first compartment for retracting the corresponding driving cord, wherein one side of the first compartment has a shaft cavity, wherein the force-return mechanism is accommodated inside the shaft cavity, wherein the braking cushion mechanism is accommodated inside a second compartment and includes a friction ring, a friction spring, and a trigger sleeve, wherein the friction ring is immovably fixed inside the housing with a wear-proof annular inwall, wherein the friction spring is tightly plugged inside the wear-proof annular inwall of the friction spring and has an extruded end, wherein the friction between the friction spring and the friction ring is reduced when a trigger part of the trigger sleeve is in contact with the extruded end.