Ultrasonic wave transmitter/receiver e.g. for use as distance sensor in vehicle, has piezoelectric vibration element attached to inner underside surface, and ultrasonic transmission/reception surface defined by external underside surface

摘要

The device has a cylindrical housing (12) with an underside, a piezoelectric vibration element (18) attached to the inner underside surface and an ultrasonic transmission/reception surface defined by the external underside surface. The underside has a thick-walled section (14) to which the piezoelectric vibration element is attached and a thin-walled section (16). The dimensions of the thin- and thick-walled sections and of a lateral section contiguous with the thin-walled section are related in a defined manner.