Patent ID: 7891399
Filing Date: 2011-02-22
Classification: E06B

Abstract:
1. A roller blind device comprising: a) a bearing bracket including a drive shaft; b) a first roller blind including a first roller blind tube and a second roller blind including a second roller blind tube, wherein the first and second roller blinds are disposed consecutively along a common rotational axis; c) a first end plug configured to cooperate with the first roller blind tube and a second end plug configured to cooperate with the second roller blind tube, wherein the drive shaft rotatably couples the first end plug to the second end plug, wherein the second end plug includes an inner part configured to cooperate with the drive shaft, a surrounding part configured to cooperate with the second roller blind tube, an unwrap spring surrounding the inner part with the unwrap spring being configured to be tightened by wrapping the spring with respect to the inner part in order to rotatably couple the second roller blind and the drive shaft together, and a rotatable control element configured to engage the unwrap spring to loosen the spring by unwrapping the spring with respect to the inner part in order to rotatably decouple the second roller blind from the drive shaft.