Opening mechanism for roller blinds/shutters - is operated by sprocket and pinion which pivot to follow blind

摘要

A blind/shutter (10) rolls round horizontal drum 11 supported by carriages (13 & 14) and by stay-plates (15 & 16). Shutter (10) which is made of slats 10A fastened together slides in runners (20 & 21) fixed to walls. Drum (11) is connected to control mechanism (30) which comprises sprocket-wheel (31) joined to drum (11) and a pinion (32) which engages the wheel and is rotated from below by rods (33). Control mechanism is supported on a block oscillating around frum's rotation axis. The mechanism therefore follows the rolling or unrolling of the blind and is always facing right direction regardless of the position of the blind shutter.