| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sufficient suction force even by sealing an actuator. SOLUTION: The ink jet head 10 for discharging an ink droplet from a nozzle by applying an electric pulse between a diaphragm 5 and an electrode by a driving circuit to deform the diaphragm by an electrostatic force comprises a vibrating chamber 9 having a wall surface formed of the diaphragm 5 and a wall surface attached to the electrode, and a first cavity 22a having a wall surface attached with leads for connecting the driving circuit to the electrode and communicating with the chamber 9. In this case, the chamber 9 is hermetically sealed. To increase a volume of an actuator of a hermetically sealed portion, the chamber 9 or a second cavity 40 communicating with the cavity 22a is further provided. |
