Winding and unwinding mechanism for roller blind

摘要

The roller blind rolling and unrolling system (3) is designed to introduce a blind (4) into the space (37) between two panes of glass (36) in a double-glazed window. The blind is made of flexible material and has a heavy bar (35) attached at its bottom edge. The heavy bar seals the gap between the two panes and acts as a weight to pull the lower edge of the blind downward when it is unrolled from the take-up roller (5). The roller is accommodated in a housing (6) at the top of the window and there is a motor which can drive the roller in order to wind up the blind via a set of reduction gears (25,26).