Keycap Profiles

By Xah Lee. Date: . Last updated: .
keycap profile wh4ty
keycap profile
keycap profile y3t9m
Keycap profile. Image by Jacobolus [image source https://geekhack.org/index.php?topic=68550]

Basically, key profile are of 2 types:

There are 3 shapes of keycap's top:

Another issue, is how the key plate is shaped:

keycap profile ms9x5-2
Keycap profile. Image by Jacobolus [image source https://geekhack.org/index.php?topic=68550]
keycap profile staircase zz78x-s696x359
Staircase uniform flat tops.
By Jacobolus [image source https://geekhack.org/index.php?topic=68550]
uniform flat tops keycap profile ns3xg-s754x332
Uniform flat tops.
By Jacobolus [image source https://geekhack.org/index.php?topic=68550]
high height angled flat top key profile kg86f-s752x333
high height, variably angled flat top.
By Jacobolus [image source https://geekhack.org/index.php?topic=68550]
low height  angled flat top  key profile bw64w-s778x321
low height, uniform angled flat top.
By Jacobolus [image source https://geekhack.org/index.php?topic=68550]
keycap profile rp457
Painstakingly constructed illustration of keycap profiles from existing keyboards. By Jacobolus [image source https://geekhack.org/index.php?topic=68550]

Conclusion

I think the best key profile is uniform with concave top. Concave top helps your finger determine position of the key. Uniform is great for swapping keycaps.

Those non-uniform keycaps profiles are a hack, to make up for flat key-plate. We should use a curved plate if one really want a ergonomic fit.

Keycaps

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