Dosing mechanism and method of manufacturing pump unit for dosing mechanism

摘要

A drug container (F1), a main body (2), and a pump unit (3) attached to the main body (2), for administering a liquid drug filled in the drug container (F1) to a patient A dispensing mechanism, wherein the pump unit (3) includes a pump driven by a piezoelectric element, and a characteristic data holding unit (38) that holds characteristic data relating to input / output of the pump in a readable manner, The main body (2) reads the characteristic data held in the characteristic data holding part (38), and a control correction value based on the characteristic data read by the reading part (27). A correction unit (2611) for determining, and a pump control unit (2612) for controlling the pump based on the determined control correction value.