Piezoelectric ultrasonic micro-injection device with modular design and adaptive to multi-type needles

The utility model discloses a piezoelectric ultrasonic microinjection device with modular design and adaptive to various types of needles. The injection device comprises a connecting rod for playing aconnecting role, the piezoelectric driving module is used for providing motion; wherein the shell is connected with the connecting rod and used for providing a containing space, the flexible mechanism is connected with the piezoelectric driving module and used for transmitting movement generated by the piezoelectric driving module, the base modules are connected with the flexible mechanism in a replaceable mode and used for fixing injection needles, and the different base modules are matched with the injection needles of different types. According to the piezoelectric ultrasonic microinjection device provided by the embodiment of the utility model, the design of the replaceable base module is adopted, so that the microinjection device not only can inhibit harmful transverse vibration in the injection process, but