Designing a USB Selector Switch for a Printer and 2 PCs
The switch shown in the original post is made for a reason. It likely either has a special analog switch and digital electronics, or a special "sharing" hub made of millions of transistors.  Mechanical switch of this kind is totally inadequate for transmitting USB signals. At most this kind of mechanical switch can handle LS mouse and keyboard, but not a modern printer, which typically uses 480 MBps HS mode.