July 18, 2025
Description
This is a fully 3D-printed spring latch mechanism that locks and releases a sliding part (the "slider") using a printed spring and a clever hook system. When you pull the spring-loaded hook, the mechanism unlocks, and the slider can move freely. Once inserted again, the hook reengages, holding it in place.
It's a simple but satisfying mechanical design, perfect as a desk toy, a mechanical demo, or even a basic quick-release lock.
Just a few drops of glue are needed to close the rear cover, and I recommend using a bit of vaseline (or lip balm, as I did!) on the sliding contact points to ensure smooth movement.
You can view or modify the CAD model in Onshape (you'll need an Onshape account)
If you find this design useful, fun, or educational, please consider buying me a coffee ☕.
License:
Creative Commons — Attribution
9
GuzGS
