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 clutch. The blind doesn't work properly now that I wound it back myself. How should this be assembled?
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 when I pull the chain and the blind goes up or down. Part 1 goes on part 5, teeth out, and meshes with 2, which goes into 4. 2's 'wings' push against the conical inside of 4 and press the teeth together. So complicated. When the blind goes up the teeth lock, when it goes down the teeth can unmesh, depending on the pressure from 2, because of its wings.
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