Ultrasonic-treatment handpiece with heat/vibration blocking structure and ultrasonic treatment apparatus using the handpiece

摘要

An ultrasonic handpiece for use in operations comprises an oscillation source and a casing unit. The oscillation source has an ultrasonic transducer formed by plural piezoelectric layers layered one on another to form a substantially rod shape having both ends in an axial direction. A radially expanded flange is attached one end of the ultrasonic transducer. The casing unit has a cylindrical casing formed to contain the oscillation source therein, formed to have a blocking layer formed to have a predetermined length in, the axial direction, and positioned to cover both the flange and at least a first piezoelectric layer of the ultrasonic transducer in the axial direction. The casing unit also has a holder holding the oscillation source within the casing using the flange. The blocking layer is in charge of blocking (reducing or preventing) vibration and heat from being transmitted to the outer surface of the casing.