Quad Lock - inspired bicycle smartphone mount

thingiverse

It's a "Quad Lock" inspired bicycle smartphone holder, or basically any holder you need to secure your device on the go. I've been using it for over a year now and it has worked flawlessly every time. All credit goes to the guys at Quadlock (https://www.quadlockcase.com/) who designed this innovative product. They used some clever geometry, which was later taken from and improved upon (in my opinion) by https://www.thingiverse.com/thing:2590838. The parts are all printed in PETG, except for the "QuadLock core" which is made of PA12 Nylon for added strength, and the phone's "female adapter" which is printed in ABS to match the material of my phone case. It was much easier and stronger to acetone-weld them together instead of using glue. Between the "lock" and "core extension," I've inserted three springs (taken from a cheap pen) - you can see the details in parts.jpg. Here's the lock in action: https://youtu.be/fzQ21qypS2Q I use it with my Galaxy S8, and it was actually designed for my Bicycle handlebar extender v2: https://www.thingiverse.com/thing:2987326