Alps common mount low profile

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Alps common mount low profile
Alps common mount low profile -- infobox.jpg
Manufacturer Alps Electric
Switch type Linear, tactile
Sense method Metal leaf
Keycap mount Alps mount
Switch mount PCB mount
Patents US 4760225 (1987)
US 5004880 (1990)

Alps common mount low profile (or Alps octagonal for short) is a provisional name for a low-profile PCB mount switch from Alps.

Description

This switch uses the common Alps mount, unlike Alps SKFR/SKFS series which has a unique mount.[1] The slider design is similar to that of Alps SKCL/SKCM series, but reduced in front-to-back depth to fit inside the switch's small shell. The contact mechanism is very similar to that of Alps SKFL; the latter is cited as prior art in the patent.

Where SKFR/SKFS series has a black slider for linear and a colourless slider for tactile, the colours are reversed with common mount low profile: black for tactile as with SKCM series, and colourless for LED.

The only branding is a minute Alps logo in the centre of the base, visible only by desoldering the switch.[1]

The switch features an integrated jumper. The tactile version has a click leaf and likely arranges this in the same way as SKFR/SKFS.[2] The patent for the leaf (which curiously shows the base as rectangular instead of octagonal) describes the switch as "click-type", but a clicky version has yet to be encountered.

No keyboard has been found to date that offers a single letter of the switch series name. The only contender is SKFN, of which SKFNAA is the sole discovered model number. As these switches appear to be older than SKFR/SKFS, SKFN is plausible, but this theory remains wholly unconfirmed. As both linear and tactile versions exist, this is highly likely to be another back-to-back pair of series.

Variants

Slider Type
Alps common mount low profile -- top.jpg Colourless Linear
Alps common mount low profile -- LED -- top.jpg Colourless Linear, with LED support
Acer 6083 Switches 1.JPG Black Tactile

Keyboards

Gallery

Linear

Tactile

LED variant

References

  1. 1.0 1.1 ちゃたりたいね — ZENITH ZA-180-89 ALPS導電ゴム枕
  2. Deskthority — Best Tactile Switch?
  3. MouseFan — IBM 5556 P/N5962851
  4. MouseFan — Toshiba UE0254P02