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Cherry MX

History

The history of Cherry MX is not clear. It seems that MX was introduced over a year after the patent was filed.

The following occurrences have been discovered to date (not counting more recent switch models):

Date Occurrence Reference
1982-08-06 Date of patent application by Cherry Mikroschalter for MX White German patent 3229465
1982-11-05 Date of early (if not the original) MX part number schema (Nummern-System Tastenmodul) covering MX Black, Linear Grey, Lock, White and Click Grey (last revised 1983-09-07) Cherry drawing TS 00006
1983-01-25 Date of single-unit 8 mm keycap drawing (last revised 1987-10-21) Cherry drawing 1P■11-NNNG3
1983-07-12 Filing date of US patent for MX White by Cherry Electrical Products in the US US patent 4467160
1983-10 Introduction of Cherry MX in Japan; according to the former Hirose Electric website, “Started sales of MX series, the Low Profile Key Switch.” hirose-st.co.jp (Wayback Machine)
1983-11-07 Date that Cherry MX was introduced, according to a suspicious image from an unspecified brochure Deskthority topic
1985-07-28 Handwritten date on a German datasheet listing MX Black, Linear Grey, White and Click Grey, but curiously not MX Lock Cherry MX datasheet
1987-04-24 Application date for MX Clear patent from Cherry Mikroschalter German patent 3713775
1988-03-31 Date of a revised MX part number schema which added MX Clear, Tactile Grey, Blue and Green (last revised 1988-08-10) Cherry drawing TS 00006-2
2009 Hirose Cherry MX no longer advertised for sale Correspondence with Hirose
2014 Hirose Cherry MX discontinued Correspondence with Hirose

Details of individual switches can be found under MX variants. See timeline page for entries covering all series.

Design

The idea that the return spring descends into the central post, as seen in Lethal Squirrel’s animations, is a myth. The return spring is exactly the same width as the central post; the post only provides additional movement capacity for the slider.