geekhack
geekhack Community => Ergonomics => Topic started by: wolfv on Tue, 06 June 2023, 20:55:04
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Here is an interesting paper from the Graduate School of Science and Engineering, Waseda University, Tokyo, Japan, 2016:
A method for using one finger to press three separate keys on a three-dimensional keyboard
https://robomechjournal.springeropen.com/articles/10.1186/s40648-015-0039-6
(https://media.springernature.com/lw685/springer-static/image/art%3A10.1186%2Fs40648-015-0039-6/MediaObjects/40648_2015_39_Fig6_HTML.gif)
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Looks like you'd be limited to 3 "rows", also, other hardware limitations, switches soft enough to not mess up your joints on the long run and small enough to be implemented to work with such design
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The upper row would have to be adjustable somehow, so people with smaller hands could press a switche on the bottom row without pressing the top one too.
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The high key looks pretty ick, but the other two are good. For a third key, the best is to locate the top roughly where the fingertip is in the first image.
For a practical implementation of this idea (that never quite made it as as commercial product), see the DataStealth, https://geekhack.org/index.php?topic=55099.0
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Looks similar to how my mouse works...
[attach=1]
You have 3 buttons per main (index/middle) finger.
The upper one even works two-way (forward/backward).
On a keyboard, you could probably do two rows for the far-key.
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...and a clay model of the board shape.
Done that as well...
Works like a charm to work out the right position!
[attachimg=1]