Cable chain system with 12.5x7.5mm internal cross-section. Cables and chain links can be inserted through a simple clip.
Bend-angle on a single hinge: 45° upwards, 30° downwards. 20mm bend radius.
Your printer should be able to print 0.2mm clearances accurately to print in place, the parts can also be assembled afterward, they are a little fragile for that though.
The author marked this model as their own original creation.