A self-locking expansion mechanism, and it is a two-position locking mechanism too.Parts can be 3d printed or manufactured with cnc machine.
Download the free 3D PDF format file here: https://www.tanerxun.com/self-locking-expansion-mechanism/.html
Download the free 3D PDF format file here: https://www.tanerxun.com/self-locking-expansion-mechanism/.html