oh so thats what is used in mice? It looks like there is a lot of stuff going on in that switch for how small they are
Most of the mice on the market use 3-4 different switches depending on the position mostly from two companies. The most commonly used are from a company called Omron and the second most common are from a company called Zippy(mostly in sidebuttons).
As for the scroll wheel encoders I'm not really familiar which they use because there's a wide variety of choices. I guess you can say the same Omron and Zippy but I believe other manufacturers are used depending on the scroll wheel component needed.
The mice switches follow something similar to the cherry coloring system were different colors apply to different forces needed. They are quite small and come in different size offerings plus different operations like using a lever instead.
Mice microswitches aren't really followed much because well the construction of the mouse dictates more the feeling rather than the switch itself. A cheap mice with most common omron switch feels cheap as hell compared to a higher quality mouse body with most common omron switch.
I do know in some of the Asian countries in particular China(I think Thailand as well but I could be wrong), there's quite a following for replacing microswitches on mice(using more responsive and faster different feeling switches), Imnop even pointed this out a few months back(Going as far as to say some of the gamers over there break down their mice, clean them, and fix them and basically treat it like a weapon). Though most of the time they use the same companies Omron or Zippy; never heard of them using other companies like Saia-burgess and whatnot.
For example the deemed to be most popular of gaming mice the Intelli-family(IE 3.0, IO 1.1, WMO 1.1) are built out of extremely cheap material and many people have complained about it. And companies have even sold these mice at higher price points with a glossy paint-job(SS, Qpad, Zowie, Alienware, list goes on). But no company has literally reconstructed the mice out of high-quality plastics and components to eliminate the cheap feel. The microswitches on the IO 1.1/IE 3.0 may be the same(D2FC-F-7N) found on say the Razer or Logitech but because of the difference in material the Razer or Logitech feels a lot better despite using the same switches.
It's kinda hard for people to bother replacing them when usually the mouse itself is the issue at hand i.e. bodily feel not switch feel. Plus I think the amount of work in replacing the switches and soldering and making sure they work is a bigger hassle. Though it's a very interesting subject that isn't really discussed much.
