It looks like
this keyboard with Oki switches that Webwit posted about.
I wrote about the switch in another thread yesterday. I find it quite interesting. I would like to try it, but I think this board is a bit expensive for me to just try-out.
The spring rests on the top of the shaft. The key cap presses on the
middle of the spring, stretching the top half down. When the bottom of the spring touches a membrane, the switch actuates and then there is added resistance from compression of the bottom half of the spring.
The click is oddly enough achieved by a single loop of the bottom half of the spring moving over a ledge inside the shaft -- if this keyboard is indeed clicky and not just clacky. There is a non-clicky version of this switch. Sellers sometimes confuse clicky with
clacky.
