Medium-long composite structure ultrasonic scalpel center rod

The invention belongs to the technical field of medical apparatuses and instruments, and particularly relates to a medium-long type ultrasonic scalpel center rod of a composite structure. The scalpel comprises a scalpel body, and the scalpel body is provided with a first center rod section, a second center rod section, a third center rod section, a fourth center rod section, a fifth center rod section, a sixth center rod section, a seventh center rod section, an eighth center rod section, a ninth center rod section, a tenth center rod section and an eleventh center rod section. The central rod is applied to a single-hole surgery, the middle-long type composite structure central rod is adopted, aiming at the length difference of the central rod and the difference of indexes needing to be reduced, the effect that the energy of the front-end central beam of the working face of the middle-long type composite structure central rod is reduced by 8-12dB compared with the energy of the rear-end central beam can be re