Patent ID: 7568783

Claim:
An inkjet head comprising: a flow passage unit in which a plurality of pressure chambers which respectively communicate with nozzles are arranged on a plane, the flow passage unit including ink flow passages that connect ink supply ports with the nozzles by way of the pressure chambers respectively, a shape of the pressure chambers in plan view being a substantial parallelogram having two acute angle portions; an actuator unit that includes a plurality of individual electrodes each having: a main electrode region corresponding to the respective pressure chamber, the main electrode regions being disposed at positions opposing the pressure chambers, an auxiliary electrode region connected to the main electrode region, the actuator unit being fixed onto the plane of the flow passage unit, and imparting ejection energy to ink in the pressure chambers; and a flat flexible cable that includes a plurality of terminals which are electrically connected with the respective auxiliary electrode regions, and a plurality of wires connected to the respective terminals and extending in one direction from the terminals; wherein: a plurality of individual electrode rows, in each of which the plurality of individual electrodes are arranged along a direction crossing the one direction, the direction crossing the one direction being parallel to shorter diagonal lines of the pressure chambers, the individual electrode rows being arranged in the actuator unit in such a manner that the individual electrode rows are parallel to each other; in at least one individual electrode row which is the most distant from a tip end of the flat flexible cable in a direction where the wires extend, individual electrodes whose auxiliary electrode regions are located closer to a tip-end side of the flat flexible cable than the main electrode regions and individual electrodes whose auxiliary electrode regions are located closer to a base-end side of the flat flexible cable than the main electrode regions are mixed.