Baby Gate Spring

Demonstration Video:
https://www.youtube.com/watch?v=i9LFOKo1dBE

My wife and I had trouble remembering if we closed the baby gate at the top of our stairs, so we were constantly walking over and double-checking. Now the gate always shuts itself whenever we walk through it, so long as the gate is released with enough distance to go so it has room to get up to speed. If you use this design for a safety-critical application, use at your own risk, as I take no responsibility for any mishaps.

The spring can easily be disengaged so that it will not spring shut, which is convenient when moving furniture for example. To disengage, start with the gate closed. Bend the end of the spring with the hook so that it comes off the gate and move it to the other side of the gate.

If the spring needs to be stronger, you can increase the height. Doubling the height will double the spring rate. Print with as many outer perimeter walls that your slicer will allow. I printed my spring with PLA, whi