This is the second version of my 12 leaf, double layer iris box. The parts are practically identical to those of the first version, except it utilises screws instead of printed pins and holes, making printing and assembly much easier. The box is opened by pushing the handle sections in an anti-clockwise direction.
The box (unscaled) is 80mm overall in diameter, has a 64mm wide container opening and is 83mm tall. The part files are designed for M2x6 countersunk screws (48 in total) for the mechanism although the parts can be scaled to use larger or smaller screws e.g. M3x8 screws at 150% scale.
To test the screwed joints, I have included test files 'Screw test pt1' and 'screw test pt2' (both are required). If you need to scale the test files for your particular screws to work, then you will need to scale all the box parts by the same amount. Note: the screw joints are identical to those on my 'Octo-box V2' design.
For the box you will need 12x 'Top' parts (any mix of 'Top' parts can be used but I recommend they are positioned in pairs across the box), 12x 'Bottom door', 6x 'Link' and 1x 'Container'.
The 'Top Door' part is a plain iris leaf for the top of the box while 'Top Door Handle' is a thicker iris leaf with a curved extension for opening the box. I recommend you print at least two of 'Top Door Handle' (maximum of 6 as in the printed examples) and arrange them on opposite sides of the box to allow ease of opening. There is also a shortened version of the container 'Short Container' which reduces the height of the container from about 83mm to 43mm.
Some supports are required for the 'Top Door Handle' part.
The assembly is quite straightforward. It's easiest to assemble the iris first and then attach it to the container although be sure that the pointed ends on the links are connected to the bottom of the iris and not the container, otherwise the box mechanism won't work.