Keyboard having key tops with hinges

Details Keyboard having key tops with hinges Keyboard having key tops with hinges

1998-12-10

2000-02-22

Hilten, John

Typewriting machines

Key-board or key lever-actuating mechanism

Including means generating a signal for type selecting or...

200343, B41J 512, H01H 1370

Patent

active

060272678

ABSTRACT:
A keyboard in which raised portions are embossed on a rubber sheet in correspondence to the respective switches of a membrane switch so that the raised portions may be pressed down to actuate the switches. A housing made of highly rigid synthetic resin is provided which has openings formed therethrough. A key top is disposed within each of the openings and formed integrally with the housing by means of at least two hinges. Each of the widthwise delimiting regions formed integrally with the housing between each widthwise adjacent openings has notches cut in from adjacent openings in depthwise staggered position. Each of the key tops has engagement tabs extending oppositely outward from two opposed side edges thereof adjoining the side edge where the hinges are formed and entering into the notches. A face panel having key top openings formed therethrough and arrayed in correspondence to the key tops is attached to the upper surface of the housing. The notches are covered from above by the corresponding widthwise dividing regions of the face panel over the widthwise delimiting regions of the housing to act as stops for the engagement tabs.

REFERENCES:
patent: 4032729 (1977-06-01), Koistinen
patent: 4160886 (1979-07-01), Wright et al.
patent: 4315114 (1982-02-01), Monti, Jr.
patent: 4486637 (1984-12-01), Chu
patent: 4845319 (1989-07-01), Watkins et al.
patent: 4967467 (1990-11-01), Udagawa
patent: 5912443 (1999-06-01), Hasunuma

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