Pressure-actuatable switching device and associated pressure sensor

摘要

A pressure-actuatable switching device for sensing a compressive force acting thereon comprises a first sheet element and a second sheet element, each one of the first and second sheet elements having a side facing towards the other sheet element and a side facing away from the other sheet element, a pressure sensitive polymer layer arranged between the first and second sheet elements and an evaluation circuit. The pressure sensitive polymer layer is electrically insulating when subjected to pressure not exceeding a certain pressure threshold and electrically conducting when subjected to pressure exceeding the pressure threshold. The evaluation circuit is electrically connected to the pressure sensitive polymer layer in such a way that it can evaluate whether the pressure sensitive polymer layer is electrically insulating or electrically conductive. The first sheet element comprises, on the side facing towards the second sheet element, at least one projection, such that a compressing force acting on the pressure-actuatable switching device is transmitted to the pressure sensitive polymer layer at least preponderantly through the at least one projection.