Patent ID: 7338152

Claim:
An inkjet head comprising: a flow-path unit including a plurality of pressure chambers that communicate with nozzles for ejecting ink, respectively; and an actuator unit that is disposed on a surface of the flow-path unit and changes volumes of the pressure chambers, wherein: the actuator unit includes: a piezoelectric sheet that is disposed over the pressure chambers; a plurality of electrodes that are disposed on the piezoelectric sheet to correspond to the pressure chambers, respectively; and a plurality of flexible printed circuit sheets each of which includes a plurality of signal lines that are connected to contact portions of the electrodes, respectively and supply drive signals to the contact portions of the electrodes, respectively; the flexible printed circuit sheets partially overlap each other on the piezoelectric sheet; the flexible printed circuit sheets include first and second flexible printed circuit sheets; the electrodes are divided into a plurality of electrode groups including first and second electrode groups; each of the electrodes includes a first and second end portions that are opposite to each other; at least a part of the electrodes of the first electrode group, which are adjacent to one end portion of the first flexible printed circuit sheet, include the contact portions contactable to the first flexible printed circuit sheet at the first end portions thereof; at least a part of the electrodes of the second electrode group, which are adjacent to the one end portion of the first flexible printed circuit sheet, include the contact portions contactable to the second flexible printed circuit sheet at the second end portions thereof; and the one end portion of the first flexible printed circuit sheet is located between the first and second electrode groups.