Editing Omron B2R series (section)

==Variants==
B2R switches have both 1 and non-1 forms. The meaning of "1" is not known, and the 1 and non-1 forms appear to be identical: B2R-M and B2R-M1 do no differ in exterior appearance or in feel, and B2R-M and B2R-ME1 are have internally identical common parts. B2R-ME1 (depicted on this page) and B2R-ME are visually almost identical, but B2R-ME doesn't have the tapered tips to the terminals.<ref>阿里巴巴 — [https://detail.1688.com/offer/530581103869.html 欧姆龙开关_b2r-me欧姆龙开关/omron指示灯开关b2r-me/欧姆龙带灯]</ref> B2R-ME also appears to have a normal black reed module instead of the white module found in B2R-ME1.

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File:Omron B2R -- M vs M1.jpg | B2R-M vs B2R-M1
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The confirmed variants are:

{| class="wikitable variants-table"
! !! Part !! Description || Target
|-
| [[File:Omron B2R-M.jpg|175px]]   || B2R-M<br>B2R-M1   || SPST momentary || Keyboards
|-
| [[File:No photograph.svg|175px]] || B2R-ME<br>B2R-ME1 || SPST momentary, illuminated || Keyboards
|-
| [[File:No photograph.svg|175px]] || B2R-G1            || SPST momentary || Other equipment
|}

===Illuminated===
The slider supports a centre LED. The LED is an unusual design, and with the legs folded upwards around the switch, it is pressed down into the top of the slider. The single return spring is replaced with two adjacent springs that fit onto short terminals. The top of each spring is straight, and the straight segments are fed through the slider and soldered to the upward-facing legs on the LED. As the LED is factory-fitted and non-removable, the positive and negative LED terminals are marked on the shell, as "K" (cathode) and "A" (anode). A single shell design and single slider design accommodate both return spring arrangements: single centre spring (non-illuminated models) and the two side-by-side springs (illuminated models).

===Alternate action===
Some discovered sliders have a latch track in the side, and a gap in the shell allows access to this. A protrusion on the shell appears to provide a pivot point for the latch arm. Thus far, this variant has yet to be sighted, so its existence remains hypothetical.

===Unknown form===
The shell also provide a means to attach additional exterior terminals, held by press fit. Most sliders contain a tapered recess that appears to work in conjunction with this exterior assembly to provide an addition form, such as [[double action]] or [[DPST]].