Patent ID: 7311131

Claim:
A rolling mechanism for a window blind, said window blind having fabric slats and support rods, said rolling mechanism comprising: a base frame fastened to a top side of a window and having a coupling flange; a roller rotatably mounted below said base frame for stationary rotation and having a locating groove formed on an outer periphery of said roller; a constraint member coupled to said base frame for limiting the rotary direction of said roller to one direction only, said constraint member having a coupling portion pivotally coupled to the coupling flange of said base frame and a constraint portion extending outwards from said coupling portion for engaging said locating groove with said roller to limit the rotary direction rotation of said roller to one direction; and at least one springy member connected between said base frame and said constraint member for forcing said constraint portion of said constraint member into engagement with said locating groove at said roller, wherein said base frame further comprises a retaining groove; said constraint member further comprises a locating hole; said springy member comprises two mounting tips respectively extending from two opposite ends thereof and respectively fastened to said retaining groove of said base frame and said locating hole of said constraint member.