I love 3D printed springs, and I wanted to include one in a carabiner for a while.
After few rejected ideas I came up with this (cool?) inverted spiral mechanism that acts as the spring for a carabiner.
I think it's pretty cool and wanted to share with you!
Also, the opening of the carabiner is designed in a way to stay firmly in place: the only way to open it is to push – it won't slide in any other direction than the one its supposed to.
3 sizes for the win: small (61mm), medium (76mm) and large (96mm)
Happy printing!