Originally Posted by fssbzz
Mechanical keyboards are keyboard that uses an individual switch for each key. They have a springiness and feel that is not the same as the standard membrane keyboard accompanying most computers. def from the dictionary.
I'm sorry that my english is very bad..
Scissor switches have an individual switch for each key coupled with a rubber dome sheet.
Many older rubber dome keyboards have discreet switches containing rubber domes.
I think a better definition would be a keyboard with switches which utilize as a main component a metal spring, either coiled or leaf, for resetting the switch, increasing force, or adding tactility.
This excludes rubber domes (both discreet and sheet) and scissor switches, while including all switches commonly described as mechanical, including buckling springs, Cherry MX and MY, and Topre (even though Topre uses rubber domes for tactility). It does add a few switches not normally considered mechanical, such as some foam element switches, but these are ancient and no longer used, so you don't need to go over them.