Patent ID: 8491073

Claim:
An inkjet printing device comprising: a flow path plate including, an ink inlet, at least one pressure chamber configured to be at least partially filled with ink supplied via the ink inlet, and at least one nozzle configured to eject the ink at least partially filling the at least one pressure chamber; a piezoelectric actuator configured to generate a first driving force for ejecting an ink droplet from the at least one nozzle by changing a pressure in the at least one pressure chamber; and an electrostatic force applicator configured to apply an electrostatic force to the ink as a second driving force to eject the ink droplet from the at least one nozzle, wherein a guide rod is formed in the at least one nozzle and extends along the center axis of the at least one nozzle, and the guide rod protrudes from an ejection surface of the flow path plate, and the ink droplet ejects from the ejection surface of the flow path plate, the ejection surface being a lowermost surface of the inkjet printing device from which the ink droplet is ejected.