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For user convenience, it sometimes is desirable to have a keyboard assembly that is able to be raised, whereby the height of the homerow of keys can be raised from, for instance, 30 mm. to 45 mm.
English (United States)
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For user convenience, it sometimes is desirable to have a keyboard
assembly that is able to be raised, whereby the height of the homerow of keys
can be raised from, for instance, 30 mm. to 45 mm.
Referring to Figs. 1A and 1B, side views of the keyboard in the lower
position (Fig. 1A) and the raised position (Fig. 1B) are shown. The keyboard is
raised by turning knob 10 in a clockwise direction, whereby leg 12 is moved from
beneath the keyboard to extend therefrom. Referring now to Fig. 2, a detailed
construction of knob 10 and leg 12 are shown, both consisting of a single plastic
element which is held against frame 14 of the keyboard by a compression spring 16. Fig. 3 shows an alternate embodiment in which compression spring 16
includes a portion 18, extending downwardly, which fits into groove 20 and acts
as a torsion spring. Connected in this manner, whenever the back end of the
keyboard is raised, leg 12 automatically is moved to the downward position, as
shown in Fig. 1B.
Referring to both Figs. 2 and 3, whenever the leg is in the downward position
as shown in Fig. 1B, compression spring 16 forces the common knob 10 and leg
12 element forward and locks it behind bar 22. In order for the operator to
release leg 12 and place the keyboard in the position shown in Fig. 1A, it is
necessary to apply manual force against knob 10, thereby depressing spring 16,
to move the leg 12 back to the interior position, as shown in Fig. 1A.