Door Stop with internal foam spring

thingiverse

One of my bathrooms boasts a unique feature: when the entry door swings all the way open, it activates the push-to-lock mechanism automatically. Unfortunately, this delay can be quite frustrating for the next person trying to use that room. To prevent the door from opening fully without sacrificing comfort, I wanted to stop it with some cushioning. Luckily, I had spare 15mm diameter insulation from another project (check out the picture) which I used as inspiration to design a three-piece solution. Here's how to assemble and attach the parts: First, put together all pieces, including foam, before securing them in place. The main block can be attached using command strips or hot glue on both sides. Next, insert the small end of the piston into the largest end of the main block. A built-in stop prevents it from falling out. Then, insert a cut piece of foam that's slightly longer than the hole. After installing the foam, push the cap onto it to lock it in place. Finally, stick or glue down the parts and you're done! I printed mine on high speed, which took about an hour. It works great, though it does make a zippy sound when it engages. You might want to sand the piston to minimize this noise, but it doesn't bother me.