PRINTING DEVICE

摘要

PURPOSE: A printing device is provided to form a large electric field around a nozzle of a sharp form, thereby increasing an electrostatic driving force added to ink droplets discharged through a nozzle. CONSTITUTION: A printing device comprises a flow path plate(110), a piezo actuator(130), and an electrostatic actuator(140). The flow path plate includes a pressure chamber(125) a nozzle(128), and a trench. The nozzle includes an outlet where the ink inside the pressure chamber is discharged. The nozzle includes a tapered portion which cross sectional area becomes decreased to the outlet. The piezo actuator provides pressure changes for discharging the ink inside the pressure chamber. The electrostatic actuator provides an electrostatic driving force to the ink inside the nozzle.