| 摘要 |
<p>A window shade includes an upper rail, a lower rail, a shads unit, a reel unit And a retarding unit. The reel unit is provided on one of the upper and lower rails, and includes a first pull cord that is connected to the other one of the upper and lower rails for adjusting the distance between the upper and lower rails. The retarding unit is provided on the one of the upper and lower rails, and includes a first retarder for retarding movement of the first pull cord. The first retarder includes two first retarding shafts that are spaced apart from each other in a horizontal direction. The first pull cord extends around the first retarding shafts.</p> |
