| 摘要 |
A cord lock (1, 40, 70) for window coverings has one or more cams (13, 14, 1 5, 16) adjacent a surface (21, 46, 76, 87) over which a one or more lift cords (12) travel. The cams are spring biased to a locked position in which they press the lift cords against the surface. A cam lock (30) with a release cor d (11) is provided which engages and moves the cams from a locked position to an unlocked position in which the lift cords are free to move through the cord lock. The cord lock is always in a locked position whenever neither the lift cords are being pulled to raise the blind nor the release cord is being pull ed to lower the blind. |
