Cửa có Khóa Lò Xo & Chìa Khóa

I used this model to turn an STL of a decorative piggybank to a working piggybank here. https://www.printables.com/model/652963-piggy-bank-with-real-lock-and-key

Just import the “OutsideEdge” model into your CAD software and cut a slightly smaller hole in your model of choice and paste this part in it's place. This can also be done in BambuSlicer without the need to bring into a dedicated CAD software. (Some models may still need cad software)

Notes:

Spring must be printed in PETG or similar material

“RoundDoor” needs to be printed in an angle similar to the picture or stringing will block spring movement