Key top

Details Key top Key top

1990-07-30

1991-11-19

Cusick, Ernest G.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200520, 200344, H01H 312

Patent

active

050668420

ABSTRACT:
A key top, of the type utilized in keyboards, is disclosed, which minimizes the lateral stress encountered by the central engaging protrusion with respect to the underlying switch. Two T-shaped reinforcing rib structures are provided on bottom surface of the top plate of the key top, with the rib structures spaced apart from the engaging protrusion, thereby providing a gap between the reinforcing ribs and the engaging protrusion, and thus dispersing lateral stress on the engaging protrusion through increased flexure of the engaging protrusion. In addition, the base of the engaging protrusion is thickened to structurally resist lateral stress.

REFERENCES:
patent: 3047700 (1962-07-01), Bailey
patent: 4001535 (1977-01-01), Scott
patent: 4463237 (1984-07-01), Kim
patent: 4626639 (1986-12-01), Bradford
patent: 4803316 (1989-03-01), Hayashi et al.

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