| 摘要 |
A window treatment system (10) for covering an architectural opening includes a window treatment with a sheet wound in a first direction; a housing (12) having a longitudinal axis and receiving said window treatment; a shaft (40) disposed coaxially within said housing for supporting said housing and a clutch (14) coupling said housing and said shaft and having a first position in which said housing is rotatable with respect to said shaft only in one direction, and a second position in which said housing is rotatable in both directions. A spool (18) is mounted coaxially with the longitudinal axis and is coupled to said clutch. The spool includes an elongated member such as a ribbon (94) wound in a second direction and arranged to raise said window treatment when said elongated member is pulled from said spool.
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