Improved piezoelectric crystal plate type ultrasonic transducer

The invention relates to a structure of a transducer, and aims to provide an improved piezoelectric crystal plate type ultrasonic transducer. The transducer comprises a plurality of groups of ceramic pieces and electrode pieces, a rear cover plate and a front cover plate, the ceramic pieces and the electrode pieces are arranged at intervals, the rear cover plate and the front cover plate are arranged at the head end and the tail end of the transducer, and a pre-stressing screw penetrates the center of the transducer; the rear plate, the ceramic pieces and the electrode pieces are of annular structures with consistent sizes, gaps are formed in the rear cover plate and the ceramic pieces, and the surfaces of the electrode pieces exposed out of the gaps are provided with welding positions for voltage input wires to connect. According to the improved piezoelectric crystal plate type ultrasonic transducer provided by the invention, under the precondition that the ultrasonic vibration intensity and a traditional transducer can be kept consistently, and the condition of breaking the electrode pieces can be reduced to a large extent; furthermore, by adopting the annular electrode pieces, the projection scope of the electrode pieces can be greatly reduced, the design and application scope of a protective shell are more flexible, and the area of the electrode piece welding potion can be improved, therefore the intensity of a part can be improved, and the probability of breaking the electrode pieces can be greatly reduced.