I always like a nice mechanism and with 3D printing you can create a lot. Based on some examples from the internet I have designed my own model. It was a bit of a hassle to get the dimension right but after the second print I was very pleased with the result. Therefore I am sharing the model.

For the complete model you need to print:

Bottom plate
Intermediate plate
Top plate
3x Shutter
3x Shutter pin

The assembly is straight forward. I have attached an exploded view image. I also made a short instruction video. Everything fits quite tight together. A bit of glue can be used to fit the top plate into the bottom plate.

Iris mechanism based on 3 blades

by Dynamite · original on Printables ↗

Hobby & Makers / Mechanical Parts

♥ 80⬇ 952🖨 4 prints

License: Creative Commons — Attribution — Noncommercial — Share Alike ↗mechanismirisshutter

Print profiles

Intermediate plate.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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Top plate.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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Shutter.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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Bottom plate.stlDEFAULT
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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Shutter pin.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print