The pin at point C fits into a smooth slot cut into member AC Since

The Albert coupler was created as a key and slot coupler with two pins Vehicles to be coupled were pushed together, both couplings moving to the same side

here Knuckle joint is assembly in solidworks in this channel you can get easy and best

pine of plinko slot Randy Shih Pin - Slot The Pin - Slot Joint Type allows the component to rotate about an axis and translate about a different Axis With the Pin

pin and slot Autodesk Inventor Assembly Tutorial for creating Slider Joints, Pin in Slot Joints, and Tangent