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I want to put a spiral lid on top of a container. When the lid opens, then the spiral mechanism will rotate into the container. Is there a name for this mechanism? If not, would something like this be possible?

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  • $\begingroup$ Please post a drawing of what you are thinking of. If Iris diaphragm or "venus box" suffices, that's great, but if you'd like something more complicated we need to see it. $\endgroup$
    – Carl Witthoft
    Feb 27, 2020 at 16:55

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It sounds like you're talking about an iris diaphragm. This has many parts that slide against each other, and would best be printed as separate parts, then assembled.

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  • $\begingroup$ Thingiverse also has examples of both the iris mechanism and the venus box. $\endgroup$
    – fred_dot_u
    Feb 27, 2020 at 16:18
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No spiral lids that I know of. I'm not sure how they would work, anyway. There are plenty of designs with hemispherical lids -- so-called "Venus" boxes. Check Yeggi:

Yeggi : Venus box

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