Keyboard

Details Keyboard Keyboard

1993-11-22

1995-08-08

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400488, 400485, B41J 526

Patent

active

054393043

ABSTRACT:
A keyboard assembly having keys which provide input signals to a processing unit includes a flexible printed circuit and underlying mat which enable the keyboard to be warped upward at its center by a system of cams which are driven by a controlled motor. Such warping induces rotation of the forearms of the user so as to have ergonomic value with respect to repetitive stress trauma.

REFERENCES:
patent: 323817 (1992-02-01), Buchin
patent: 332948 (1993-02-01), Barr
patent: 4467150 (1984-08-01), Leitermann et al.
patent: 4480932 (1984-11-01), Wilcox
patent: 4509873 (1985-04-01), Ryan
patent: 4735520 (1988-04-01), Suzuki et al.
patent: 4994634 (1991-02-01), Tanji et al.
patent: 5067834 (1991-11-01), Szmanda et al.
patent: 5141343 (1992-08-01), Roylance et al.

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