Patent ID: 8156991

Claim:
A cord lock of a window covering, comprising: a box having a chamber therein, an engaging block integrally formed on a sidewall of the box, a first opening communicated with the chamber for a cord exiting the box, a second opening opposite the first opening for the cord entering the box, a fixed locking portion on an outer side of the box, and a flexible locking portion opposite the fixed locking portion; a movable driving wheel, which is received in the chamber of the box, to be moved between a lock position, in which the movable driving wheel is moved toward the engaging block to clip the cord therebetween, and a release position, in which the movable driving wheel is moved away from the engaging block to release the cord; and a wear-resisted member provided on the engaging block to rest the cord thereon, wherein the engaging block further includes a convex portion having a curvature smaller than that of the movable driving wheel; wherein the wear-resisted member is a plate made of a wear-resisting material, the wear-resisted member conforming completely to a shape of the engaging block such that an entire inner surface of the wear-resisting member engages the engaging block.