Keyboard pad structure for electronic devices

Claim 1

An electronic housing structure comprising: an enclosure for containing at least one electronic device therein, said electronic device including a plurality of user interface switches; a keyboard pad assembly including a plurality of key pads, each of said key pads corresponds to be adjacent to one of said corresponding user interface switches, said key pads are of different sizes and shapes whereby an electronic device user can conveniently differentiate each of said key pads without requiring a visual inspection; the enclosure and the keyboards being comprised of a waterproof, dust-proof, and mud-proof material whereby said electronic device is more suitable for continuous outdoor operation; each of said key pads includes an external surface, an internal surface opposite said external surface, an interface chamber and a convex press-down cap disposed on said external surface with a striking stump disposed on said internal surface opposite said press-down cap, said striking stump is adjacent to said corresponding user interface switch whereby a user can activate said corresponding user interface switch by applying pressure to said press-down cap urging said striking stump to contact said user interface switch; said keyboard further includes an external surface, an internal surface opposite said external surface, and a plurality of air passages disposed on said internal surface of said keyboard, each of said air passages interconnecting with at least two of said interface chambers to maintain an air communication between said interface chambers of said key pads whereby said press-down keys may be easily pressed down without a need to overcome an air pressure resistance due to a volume of air in said interface chamber; the enclosure further includes a plurality of user interface openings, each corresponding to one of said key pads, each of said key pads further has a sealing means whereby when said key pads are inserted in said corresponding user interface openings said key pads securely attach to the enclosure and tightly seals said user interface openings preventing moisture, dust, or mud from entering through said interface openings; said sealing means of said key pad includes a sealing flange extending outwardly and downwardly from a lower edge of said press-down cap; and said corresponding interface openings on the enclosure include a step-down lip extending inwardly toward a center of said interface opening for receiving said flange seal of said key pad.