Patent ID: 7705258

Claim:
An electronic key with at least one inherently dimensionally stable push button ( 31 to 33 ), which has a peripheral projection ( 38 ) that is recessed relative to the push button actuation surface ( 34 ), where the push button ( 31 to 33 ) is arranged in an opening ( 13 to 15 ) of a housing ( 11 ), the push button ( 31 to 33 ), when operated ( 53 ), acts on the actuator ( 51 ) of a switching element ( 50 ) seated in the interior ( 16 ) of the housing, and the peripheral projection ( 38 ) of the push button ( 31 to 35 ) interacts with an outer stop ( 18 ) in the neutral position, which (outer stop 18 ) limits the upper travel of the push button ( 31 to 33 ) in the housing ( 11 , 12 ), and, when the push button is actuated ( 53 ), strikes an inner stop ( 28 ), which limits the lower travel of the push button ( 31 to 33 ), and with a membrane ( 21 ) that is arranged between the push buttons ( 31 to 33 ) and the actuator ( 51 ) of the switching element ( 50 ) and undergoes elastic deformation when the push button ( 31 to 33 ) is operated ( 52 ) wherein the membrane ( 21 ) is the soft component of a dual-component element (2K element 20 ), which is produced by dual-component technology, and the hard component of the 2K element ( 20 ) consists of a frame ( 22 ), whose webs 26 enclose at least one open membrane field ( 40 ), where the frame ( 26 ) of the 2K element ( 20 ) forms the inner stop ( 28 ) for the push button ( 31 to 33 ), where the push button ( 31 to 33 ) can be freely inserted into the housing opening ( 13 to 15 ) from the inside ( 16 ) of the housing ( 11 ), where the housing opening ( 13 to 15 ) is constructed sufficiently large that it encloses the whole push button actuation surface ( 34 ), and where the inner surface of the peripheral zone ( 17 ) of the housing ( 11 ), which surrounds the housing opening ( 13 to 15 ), forms the outer stop ( 18 ) for the push button ( 31 to 33 )