Covering member of keyboard and a base plate therefor

Details Covering member of keyboard and a base plate therefor Covering member of keyboard and a base plate therefor

1987-04-10

1988-10-04

Kittle, John E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428901, 84 101, 84 114, 84DIG22, 357 65, B32B 300, G10H 100, G10H 300

Patent

active

047755741

ABSTRACT:
A covering member of keyboard prepared by separately fixing the push button elements to a base plate instead of integral molding is disclosed in which the plate has openings arranged conforming to the pattern of the fixed contact points on the circuit board. Fixing is carried out by using a silicone rubber-based adhesive or a pressure-sensitive adhesive optionally with the aid of tailing of protrusions on the base plate into the cavity of the base of the push button elements. A method of using unit bodies carrying push button elements is alternatively used. A base plate having openings arranged in the pattern corresponding to the fixed contact points is also disclosed for use in fixing the push button elements.

REFERENCES:
patent: 3890480 (1975-06-01), Berling et al.
patent: 3921167 (1975-11-01), Fox
patent: 3964593 (1976-06-01), Pointon
patent: 4359612 (1982-11-01), Rooney
patent: 4619175 (1986-10-01), Matsuzaki

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