Matsushita prong over membrane

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Matsushita prong over membrane
Manufacturer Matsushita
Sense method Membrane
Keycap mount Proprietary, integrated mount

Matsushita prong over membrane is a prong over membrane design. The keycap features three posts; two of the posts (one each at the front and back) have lugs that hold the keycap within the guide plate, and a third post in the corner may provide stabilisation. A centre shaft contains the helical return spring, which in turn presses on the membrane pressure prong.

A Canon Typestar 210 portable typewriter showing the Matsushita prong over membrane keyswitch.

Keyboards

  • Some Acorn Archimedes keyboards (backplate labels have the "M" Matsushita logo)
  • Some Amstrad keyboard (membranes have the triangle Matsushita logo)[1]
  • Commodore 386SX-LT (exact details unconfirmed)
  • Some Panasonic keyboard (backplate label has the "M" Matsushita logo)[2]
  • Panasonic FW-TK101 numeric keypad (backplate label has the "M" Matsushita logo)[3]
  • Canon Typestar 210 portable typewriter (backplate label has the "M" Matsushita logo)[4]
  • Panasonic (KXW) Word Processor Keyboards[5]

References