Mitsumi KDM
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| Manufacturer | Mitsumi |
|---|---|
| Switch type | Linear |
| Sense method | Metal contact |
| Total travel | ca. 3.8 mm |
| Keycap mount | Cruciform, round |
| Switch mount | Plate mount |
Mitsumi simplified is a linear, metal contact switch from Mitsumi.
Nomenclature
The moniker "Mitsumi simplified" follows a tradition of using the appellation "simplified" for switches that appear to be a cost-effective design compared to a brand's more complex offerings. However a Nakajima All typewriter with these switches has a PCB inscribed "KDM-A70YU", implies that the correct designation is "KDM Type".[1] "Mitsumi simplified" is the historically used designation for these switches but given the observed designations, "KDM" is more accurate. "KDM" would fit with the existing designation patterns for Mitsumi switches where "KCx" indicated type 2 Mitsumi standard mechanical, and the implication of "linear" or "momentary" for "KxM" per Mitsumi miniature mechanical.
Description
It shares keycap mount with the switches used in the Commodore 64; the cross mount type accepts C64 keycaps, and the round mount type fits the keystem adapter for the alternate action switch.
The switch uses bare metal contacts, which are also the terminals; the terminals can be seen running down the outside of the switch.
The switch is clearly branded on the base with the older (Kana) Mitsumi logo.
No other details are known to exist.
Variants
| Mount | |
|---|---|
 |
Round |
 |
Cross |
Cyan sliders also exist.[2]
Keyboards
- Nakajima All typewriter (unconfirmed)[1]
- Tono THETA O-9000E / Round mount
Gallery
Cross mount
The depicted switch is NOS from STRONIC in France. The part number is not known.
Top
Side
Base
Keycap mount
