| 摘要 |
A covering for an architectural opening is provided. The covering may include a roller, a shade, and an assembly associated with the roller. The assembly may include a biasing element and a retention element. The biasing element may be operably associated with the roller to selectively rotate the roller. The biasing element may be preloaded. The retention element may be associated with the biasing element. The retention element may be operable to release the preload in the biasing element at an extended shade position. |
