Ultrasonic transducer with piezoelectric element and distance sensor

The invention relates to an ultrasonic transducer, comprising a piezoelectric element, with a printed circuit board and with a diaphragm pot. The piezoelectric element is attached to the front face of the diaphragm pot and connected via at least two leads, to signal connection points of the printed circuit board. In one arrangement a portion of the circuit board projects into the diaphragm pot. The portion of the PCB may be smaller in width than the clear width of the diaphragm pot, and the remainder of the PCB may be arranged outside the pot. Alternatively the leads, (e.g. wires, single core cables) are arranged so that they run with a spacing from one another which is smaller than half the width of the piezoelectric element, preferably no more than the electrode gap width of the element. The transducer may be attached to a panel of a motor vehicle and used as a distance sensor. The distance sensor includes the ultrasonic transducer and also an acoustic damping ring and a housing. A maintaining cover of the