Alps spring over membrane
|Keycap mount||Alps mount|
|Switch mount||Plate mount|
Alps spring over membrane is a provisional name for an Alps membrane switch using discrete plate-mounted switches with Alps mount sliders. Each switch module contains two helical springs: a return spring for the slider, and a downward-facing contact spring that applies pressure to the membrane. The latter is likely to permit mid-travel actuation.
The switch is probably linear or progressive rate, and non-clicky.
It appears that Alps moulded spring over membrane was the reduced cost successor.
- Some C.ITOH keyboards
- MouseFan — C.ITOH 2種 Retrieved 2015-07-22.