Have a toddler who's tall enough to open doors, and thinks your 3D printers are the COOLEST THING EVER? Have a door you want your cat to be able to get through but not your child? Want to maintain a bit of airflow through a room but need to keep it secured? Well this might be the solution to your problems.

This is a 2-piece door lock that slides onto your doorframe and holds the door securely a few inches open. Requires no extra parts, and assembly takes about 5 seconds - just flip the locking piece over and push the peg into the hole on the doorframe piece. It's specifically designed to allow the cat through, but not toddlers or babies. Mount it high on the door so adults can effectively open it but children can't.

This device is currently sized to the specific door I need it for, so it may not fit yours. I'm currently working on a universal model that I'll release as a V2, but in the meantime, if you want to remix this and reupload it, please do (I'd appreciate a comment linking to your remix so I can try it for other doors lol). I should also be releasing both shorter and longer versions soon to allow for more door positions.

The print profile I'm uploading is deliberately overbuilt for a bit of extra strength, but prints in just under an hour in ludicrous mode on my X1C. If your toddler is particularly jacked, you can scale both parts in the Z axis without affecting the functionality.

This thing tension mounts to the doorframe, no screws or adhesives required (great for renters with landlords who hate holes in the wall). In order to fully close the door, you have to remove it. I printed a bunch of these in PLA+ because it's what I had on hand, but if you want it to last longer, I would recommend something like PETG due to the flexing required both in the friction mount and to clamp to the door.

If you're using a textured PEI plate, please remember to switch your plate settings in Bambu Studio or Bambu Handy before printing, both my profiles are for the Bambu Cool Plate. Happy printing!