Buckle Latch (Chốt gài/khóa gài)

Buckle Latch 

for doors and boxes consists of 3 3D-printed parts, and can be screwed in place. 

It is an overconstrained mechanism using an overcenter-linkage, Teaching Tech made an excellent video about the concept of this mechanism. I highly recommend watching it if you are interested in the design. 

The Version 2 uses 2m metal rods instead of the 3mm bolts and the strength of the hook is increased.

Design

The design of the 3D-printed parts is done in Onshape, and the model can be found here: 

The base part is printed as one to allow easy alignment when screwing it down, the thin connector can be cut easily when fixed in place. 

Printing

I printed my parts in PCTG on a Prusa MINI in the orientation seen below.
 

Changelog

• 02.02.24 - Added V2 
• 23.06.24 - Added separate step files and changed the orientation of the 3mf file

Happy Printing!