| 摘要 |
A window blind (100, 200) has a carriage (20, 40) provided in a headrail (10, 30), wherein the carriage (20, 40) is movable along the headrail (10, 30) to bring at least one cord (22), and to move a bottom rail (12, 32) up and down relative to the headrail (10, 30) between an expanding position (P3) and a collapsing position (P4). A retarding unit is further provided in the headrail (10, 30), wherein the retarding unit provides a retarding force to the carriage (20, 40) to stop the carriage (20, 40) when the bottom rail (12, 32) arrives at the expanding position (P4), which ensures that the bottom rail (12, 32) stops at a predetermined position without rebounding when the window blind (100, 200) is fully expanded. |
