Child Safety Latch for Entry Doors (Bedrooms, Closets, etc.)

thingiverse

This child safety latch is a very simple, but effective design. It just slides on top of the door and locks/unlocks by engaging with a dowel that is screwed into the top of the door frame. One screw is all that is required for mounting. Edit: I've also added a door catch, if you'd rather use that than a dowel. Edit 2: I've added a new design (version e) where I've strengthened the area around the latch. It's amazing how strong a 2-year old can be! I've specifically designed this latch for easy 3D printing without support.I really like this design, because it prevents finger pinching by holding the door tightly closed. This type of latch can be a real life saver for parents! Instructions This should fit most standard interior house doors. This latch slides on top of the door. You'll need to drill a hole in the center of a 1" long dowel and screw it into the top of the door frame. See the photos for details. Edit: I've also added a door catch, if you'd rather use that than a dowel. I've built in a thin support across the opening gap on the bottom of the model to help keep the print stuck to the build plate. It's easy enough to trim off after the print is completed. Recommended Print Settings: 0.3mm layer height 100% infill no support Edit: Printing with a brim is very helpful. I use 8 lines for the brim.