The string (part 3) is the devil. Without it the blind won't behave - it keeps descending after I stop pulling the chain. It is attached to part 4 and the wheel housing bit of part 5 - it turns with the wheel. It winds round the big capstan of part 5 and one of either 1 or 2. So it winds and unwinds...
I have made a mess of fixing a roller blind chain and now I need help. The chain isn't the problem - it's the clutch mechanism. It came apart and I don't know how it goes back together. It has a short cord on the inside that winds round both a fixed capstan and a separated toothed capstan inside the...