An electronic device with a function of recognizing multi-touch inputs includes a multi-touch display unit, an input unit receiving multi-touch inputs on the multi-touch display unit, a storage unit, and a processing unit. The tire support structure comprises a flexible torus portion proximal to an inner core, and a substantially rigid radially extending portion extending radially outward from the flexible torus portion. Changes in shape of the resulting piezoelectric arrangement allow a deflection of the membrane and a corresponding controllable upward or downward movement of the conductive element.