Patent ID: 9079400
Filing Date: 2015-07-14
Classification: B41J

Abstract:
1. An ink jet head comprising: an ink pressure chamber configured to store ink; a nozzle hole through which the ink in the ink pressure chamber is discharged; a vibrating plate formed over the ink pressure chamber to surround the nozzle hole; an actuator to drive the vibrating plate; and electrodes formed to drive the actuator, the electrodes comprising a first electrode and a second electrode with the actuator interposed therebetween; wherein the second electrode is formed on the vibrating plate and in contact with a first surface of the actuator; wherein the first electrode comprises an upper electrode in contact with a second surface of the actuator opposite the first surface, a connection portion in contact with the upper electrode, and a wiring portion in contact with the connection portion; and wherein the first electrode and the second electrode are symmetrically disposed around the nozzle hole in a region on the vibrating plate corresponding to the ink pressure chamber.