Mitsumi membrane lock

Mitsumi membrane lock

Manufacturer	Mitsumi
Family	Mitsumi KPQ Type
Switch type	Alternate action
Clicky?	Yes
Sense method	Membrane

The Mitsumi membrane lock switch is an alternate action switch used with Mitsumi KPQ Type. The switch has mechanical parts by necessity, but it provides a conductive rubber foot that connects membrane traces. In theory this switch could be used with other Mitsumi hybrid switch types, but thus far it has only been found in a single model of keyboard.

The follower arm is a piece of bent copper wire that hooks inside a copper leaf spring, just as with Mitsumi standard mechanical.

Keyboards

• Mitsumi-made Apple Keyboard II

Gallery

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  The switch slots into a hole in the slider mounting plate
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  The mounting plate from below
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  Open position, with the follower arm visible
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  Closed position
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  Follower track, and arm
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  Follower arm in place within the switch
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  Entire mechanism disassembled