Patent ID: 7618118

Claim:
An inkjet head comprising: a channel unit having an ink ejection surface that includes a plurality of nozzles for ejecting ink, another surface opposite to the ink ejection surface, a common ink chamber, a plurality of pressure chambers each having a volume, and a plurality of individual ink channels each fluidly connecting the common ink chamber with one of the plurality of nozzles via a corresponding one of the plurality of pressure chambers; an actuator portion fixed to a portion of the another surface, the actuator portion comprising a plurality of actuator units being deformable to selectively change the volumes of the plurality of pressure chambers, thereby applying pressure to ink therein; a reservoir unit having a first surface fixed to another portion of the another surface, a second surface being opposite to the first surface and extending in parallel with the ink ejection surface, and an ink reservoir accommodating ink to be supplied to the common ink chamber, the reservoir unit extending in a longitudinal direction, the actuator portion being interposed between the channel unit and the reservoir unit; a base plate having a flat planar surface; and a fixing portion fixing the base plate to the reservoir unit at a plurality of positions along the longitudinal direction, allowing the flat planar surface of the base plate to be in close contact with a longitudinal entirety of the second surface of the reservoir unit, the positions being equally spaced and arranged corresponding to the centers of the actuator units or the gaps between adjacent actuator units, wherein the actuator units are disposed between the channel unit and the reservoir unit.