Key top layout of a keyboard

Details Key top layout of a keyboard Key top layout of a keyboard

2001-09-26

2003-08-12

Evanisko, Leslie J. (Department: 2854)

Typewriting machines

Key-board or key lever-actuating mechanism

C400S489000, CD14S392000

Reexamination Certificate

active

06604877

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a key top layout of keyboard, especially to a key top with ergonomic design and not wasting space.
BACKGROUND OF THE INVENTION
The computers are extensively used in modern society for data processing or other task such as spreadsheet. Therefore, the input devices for computer are also important to facilitate those jobs. For example, a keyboard is an inevitable input device for computer.
FIGS. 1
to
3
show a conventional keyboard
10
a
. As shown in those figures, the keyboard
10
a
has a plurality of keyswitches and each keyswitch has a key top
11
a
thereon. The key tops
11
a
are arranged in chessboard pattern and each has a rectangular shape. However, the hands of user naturally align in inclined directions with respect to the vertical bisection line of the keyboard
10
a
. The user often needs to wrench inward his hands to types keys near the vertical bisection line of the keyboard
10
a
as shown in FIG.
3
. Therefore, the user tends to have ache symptom after long time of typing.
As shown in
FIG. 4
, an ergonomic keyboard
20
a
is developed to solve this problem. The ergonomic keyboard
20
a
generally has a main typing area
21
a
and the key tops
211
a
in the main typing area
21
a
are also of rectangular shape. Moreover, the main typing area
21
a
is divided into a left-hand section
22
a
and a right-hand section
23
a
such that the user can put his hands on the keyboard
20
a
in a more ergonomic way. However, a wasted space is inevitably placed at center portion of the ergonomic keyboard
20
a
. The area of the ergonomic keyboard
20
a
is increased such that the ergonomic keyboard
20
a
is not suitable for notebook computer.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide a key top layout with ergonomic design and not wasting space. The keyboard using this key top layout is suitable for desktop computer, notebook computer and cash register.
To achieve above object, the present invention provides a key top layout of keyboard. The keyboard has a main typing area on which a plurality of key tops is placed. The key tops are divided into a plurality of rows by a plurality of horizontal lines. The key tops are divided into a left-hand section and a right-hand section with a centerline of the keyboard as a border. Each key top in the left-hand section is of quadrilateral shape with right-shifted topside and left-shifted bottom side; each key top in the right-hand section is of quadrilateral shape with left-shifted topside and right-shifted bottom side.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:


REFERENCES:
patent: 1468566 (1923-09-01), Hall
patent: D357011 (1995-04-01), Paull et al.
patent: 2311256 (1997-09-01), None

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