My cheap headphones broke, so I printed some parts to lock the broken hinges in place. I would not recommend these headphones since the hinges are tiny plastic parts. But if you already have some, you can extend the lifetime by printing these part when the hinges inevitably break.

You will need to mirror the part in a slicer or some other software to print the other side. I ended up taping the two sides together to keep it from falling in half.

I attached the original inventor file and a step file so that you can play around with it too if you would like.

The part is 0.72 inches tall for your scaling convenience.