Mitsumi KPQ Type
 | |
| Manufacturer | Mitsumi |
|---|---|
| Family | Mitsumi hybrid switch |
| Switch type | Tactile; linear (illuminated only) |
| Rated lifetime |
10 M (4 mm) 5 M (3 mm) |
| Bounce time | 5 ms |
| Tactile force | 50±20 g |
| Actuation force | ca. 30 g |
| Total travel |
4.0±0.5 mm 3.0±0.5 mm |
| Keycap mount | Mitsumi mount |
Mitsumi KPQ Type is a Mitsumi hybrid switch type; the linear equivalent is Mitsumi KPR Type. KPQ Type also covers stock keyboards and full custom OEM products made with these switches.
Description[edit | edit source]
KPQ Type keyboards use a conductive rubber foot to bridge traces on a single membrane sheet. A buckling rubber sleeve is placed under the keycap to provide tactility and return the key.
Where an integrated LED is required, the switch in question will be linear: the rubber sleeve would obstruct the LED. This can be seen in the Commodore Amiga 2000 keyboard, although that is KKQ Type.
Alternate action is provided by the Mitsumi membrane lock semi-discrete switch module.
Some equipment including the Commodore Amiga 2000 and Commodore CDTV use Mitsumi KKQ Type, which is visibly identical from above, but internally uses a PCB instead of a membrane sheet.
Keyboards[edit | edit source]
Mitsumi[edit | edit source]
- All KPQ keyboards including:
- Mitsumi KPQ-E99AC
- Mitsumi KPQ-E99YC
- Mitsumi KPQ-E99ZC
- Mitsumi KPQ-EA0YY
- Mitsumi KPQ-EA4AA/EA5AA
- Mitsumi KPQ-EA4EA/EA5EA/EA9EA
- Mitsumi KPQ-EA4YA/EA5YA
- Mitsumi KPQ-EA4ZA/EA5ZA
OEM[edit | edit source]
- Some Apple Keyboard II
- Some Commodore Amiga keyboards
- IBM 5576-B01
- NeXT ADB
- Xtra Business Systems 401386-001<ref name="xtra"/>
Gallery[edit | edit source]
Apple Keyboard II[edit | edit source]
The Keyboard II has a dedicated slider guide plate, rather than using the top case to mount the sliders.
-
Tactile switches -
Single membrane sheet -
Mitsumi switch system and keycaps -
Rear of the switch system, showing the conductive feet on the sliders
Mitsumi KPQ-E99ZC[edit | edit source]
-
Top view of the switches -
Single dome dual slider arrangement for wide key -
Membrane inscriptions -
Underside detail of switch, with buckling rubber sleeve shown -
Sliders and buckling rubber sleeves
Specifications[edit | edit source]
- Datasheet, 4 mm travel version (1998)
- Datasheet, 3 mm travel version (1998)
References[edit | edit source]
<references> <ref name="xtra">Imgur — Xtra Business Systems - 401386-001 - Mitsumi KPQ Uploaded 2023-01-25.</ref> </references>
