The file 'Etui – Spectacle Case | Living Hinge | Folding 3D-Print 3D Printer Model' is (stl) file type, size is 264.4KB.
This model doesn't need springs, active hinges, or magnets to work.
Neither is it printed with flexible materials - just regular brittle PLA.
To achieve this behavior, I applied an common engineering technique from wood-design.
The "Living-Hinge" Cut Pattern.
And it worked out like a charm.
bend.stl | 986.1KB | |
side.stl | 131.6KB | |
side_2.stl | 131.6KB |