Patent ID: 8148657

Claim:
A key for intermittent electrical contact-connection of at least two conductors arranged on a printed circuit board to at least one electrically conductive contact element, the key comprising: at least one base arranged on the printed circuit board; and a key head, which is movable relative to the printed circuit board and the base, positioned such that the at least one contact element is arranged underneath, wherein the key head is connected to the base by means of at least one movable membrane, and the base and membrane are composed of an insulating elastic material, wherein the key has at least one soldering foot which is incorporated by a first end thereof in the base in a positively locking manner, and the key is fixed on the printed circuit board by a second end of the soldering foot, wherein the soldering foot includes one of a circumferential stiffening and a circumferentially and sectionally interrupted stiffening having a plane arranged parallel to the plane of the printed circuit board incorporated completely in the base, wherein the soldering foot further includes, at said stiffening, a vertical section which is arranged substantially perpendicular to a plane of the printed circuit board and which is incorporated completely in the base and at a lower end of which said soldering region is arranged, and wherein the soldering foot, adjacent to said vertical section, further includes a planar soldering region projecting laterally and bearing on the printed circuit board and parallel thereto.