Patent ID: 6986564

Claim:
An ink jet head, comprising a plurality of line heads arranged in a scanning direction, wherein: each line head includes: a pressure chamber block including a common liquid chamber for storing an ink, a plurality of pressure chambers communicated to the common liquid chamber, and a plurality of nozzles respectively communicated to the pressure chambers; and a plurality of actuator blocks each including a piezoelectric element, a first electrode and a second electrode for applying a voltage across the piezoelectric element, and a vibration plate, the plurality of actuator blocks being arranged on one surface of the pressure chamber block so that more than one of the pressure chambers of the pressure chamber block are covered by the vibration plate; and the actuator blocks of each line head are arranged in a head longitudinal direction with adjacent ones of the actuator blocks being spaced apart from each other, and the actuator blocks of the line head are shifted from the actuator blocks of another line head in the head longitudinal direction while partially overlapping with the actuator blocks of the other line head in the head longitudinal direction.