Patent ID: 7642476

Claim:
A push-button arrangement comprising: at least one fastening plate having an outer surface and an inner surface; at least one fastening hole in the fastening plate; a switch arranged at the at least one fastening hole, on the inner surface side of the fastening plate; at least one push-button made substantially entirely of an elastic material; and a fastening portion for fastening the push-button to the fastening hole in the fastening plate, the fastening portion comprising at least one fastening sleeve portion with an annular cross-section and an outer surface arranged against the fastening hole, the push-button comprising a press portion, the fastening sleeve portion having at least one fastening member on the end portion facing away from the press portion, the fastening member being configured to press against the fastening plate, the fastening hole comprising at least one conical sealing surface, the outer surface of the fastening sleeve portion comprising at least one conical sealing surface arranged to press against the sealing surface of the fastening hole, thereby providing a sealing arrangement between the push-button and the fastening plate, and the conical sealing surfaces of the fastening hole and the fastening sleeve portion tapering from the outer surface side towards the inner surface side, whereby the pressing of the push-button improves the sealing between the sealing surfaces.