Abstract: A liquid jet head (1) has an actuator portion (2). The actuator portion includes: a first recessed portion (6), left and right second recessed portions (7L, 7R) formed at a distance from the first recessed portion and provided so as to sandwich the first recessed portion therebetween; and left and right channel rows (9L, 9R) provided between the first recessed portion and the left and right second recessed portions, respectively, the left and right channel rows each including a plurality of channels arrayed therein, the plurality of channels each having one end portion opened to the first recessed portion and another end portion opened to one of the left and right second recessed portions. The left channel row (9L) and the right channel row (9R) are offset in a row direction by ½ of a channel pitch.

Abstract: Provided is a liquid jet head (1), including a plurality of head chips (2) each including an actuator portion (3) and a nozzle plate (4). The actuator portion (3) includes: a filter (7); a first liquid chamber (5) communicating to a downstream side of the filter (7); a channel (8) communicating to the first liquid chamber (5), for inducing pressure on liquid therein; and an electrode terminal (10) for transmitting a drive signal to the channel (8). The head chips (2) each include the nozzle plate (4) bonded to a first end face (F1) of each actuator portion (3). The nozzle plates (4) are provided so that surfaces thereof flush with one another. This enables inspection of the respective head chips (2) before the respective head chips (2) are laminated and assembled, so that only head chips which have passed inspection can be laminated and assembled.

Abstract: The liquid jet head (1) has an actuator portion (2). The actuator portion includes a first recessed portion (6), a second recessed portion (7) formed at a distance therefrom, a channel row (9) provided between the first recessed portion and the second recessed portion, the channel row including a plurality of channels (8) arranged therein, the plurality of channels each having one end portion opened to the first recessed portion and the other end portion opened to the second recessed portion, and an electrode terminal row (11) including a plurality of electrode terminals (10) provided on a front surface on an outer peripheral side with respect to the second recessed portion or the first recessed portion, the electrode terminals transmitting a drive signal to the channel row. The electrode terminals for connection to an outside circuit are formed on a side opposite to a liquid droplet ejection side.

Abstract: To prevent deterioration of an ejection characteristic, which is caused by adhesion of an air bubble mixed in liquid to channels (6) and slits (13) communicated therewith, provided is a liquid jet head, including: a supply port (2) through which liquid is supplied; a discharge port (3) through which the liquid is discharged; a liquid supply chamber (4) communicated with the supply port (2); a liquid discharge chamber (5) communicated with the discharge port (3); a channel row (7) forced of a plurality of channels (6), which are provided in parallel between the liquid supply chamber (4) and the liquid discharge chamber (5) and communicated with the liquid supply chamber (4) and the liquid discharge chamber (5); and a communication path (9) for bypassing the liquid from the liquid supply chamber (4) to the liquid discharge chamber (5). An air bubble is removed outside via the communication path (9).