Gaseous ultrasonic transducer of end band metal protection membrane structure before matching layer

The utility model discloses a gaseous ultrasonic transducer of end band metal protection membrane structure before matching layer. Follow the supreme close adhesive layer of plastic housing, metal clamp plate and stereoplasm that is equipped with in proper order down in the metal -back, two sinle silks in the wire weld respectively at the positive pole -face of piezoelectric patches and the edge of negative pole face. The boss at the up end of piezoelectric patches and plastic housing center is connected, in end face centre's the constant head tank, packs the flexible glue filling layer between piezoelectric patches, matching layer and the plastic housing on the lower terminal surface embedding matching layer, and cap form metal protection membrane cover is at the lower terminal surface of plastic housing, and the terminal surface is connected under cap form metal protection membrane and the matching layer, and the metal protection membrane was described to the cap shade and metal -back are equipped with the