Patent ID: 7910848

Claim:
A keypad device, comprising a main body; an electronic assembly including circuit elements and installed in said main body; a closing shell; a plurality of keys which are installed in said closing shell and configured to mechanically actuate said circuit elements, said closing shell with said installed keys together forming a first preinstalled assembly, while said main body with said electronic assembly forms a second preinstalled assembly, said first and second assemblies being interconnected such that they are separable; and a fastening device which is configured as a guide bolt on a key side and as a snap-in receptacle comprising guide bushings integrally formed on an upper portion of a closing-shell side and having a peripheral wall with a portion having an aperture which receives said guide bolt, which guide bolt is configured to be oriented outwardly away from an axial center and in a direction selected from a group consisting of perpendicularly and substantially perpendicularly with respect to an actuating direction of said keys in order to detachably install said keys in said closing shell, wherein at least one of said keys includes at least two guide bolts arranged in a manner selected from a consisting of positioned on said at least one key asymmetrically relative to each other, configured to have an intermediate angle of less than or greater than 180° , and both.