Draft for a bungee-sprung coupling 

• that will self-reset into place after being bumped 
• (or at least will be easy to reset)

Background:

• Problem to be solved: Some (protuding) parts of assemblies might get subjected to external forces so strong that it would be unreasonable to design them to withstand these.
• Solution: 
  • Accept that the assembly will be moved out of its proper position by external forces, avoiding damage that way.
  • Incorporate a bungee cord that resets the assembly into position, or at least supports an easy manual reset.

The coupling includes a large central hole to allow the routing of cables in addition to the installation of the bungee cord.

The part is intended as a demonstration of the design principles and not really designed to go into a specific assembly.

The OpenSCAD source code is included, so spinning off modified parts fitting a specific real assembly shouldn't be too hard.