THIS IS PROBABLY THE MOST EFFECTIVE CHILDPROOF LOCK .
Modified commercial child lock. Elegant non intrusive HARD TO OPEN design.
There are different versions of upper cap:
1) rounded -you will need support to print it
2) flat- no support needed
I also attached 2 versions of limiter:
1) Ready to assemble
2) Hole of 4.5 mm should be drilled (in case printed walls are weak - cheaper, moisty filament)
To fix it you will need some glue, silicone or double tape.
MakerBot Replicator Z18
I printed it in PLA and PETG.