Abstract:
A liquid jet head has a piezoelectric body substrate which includes a groove row in which ejection grooves penetrating the piezoelectric body substrate from an upper surface through a lower surface and non-ejection grooves open on the upper surface are alternately arranged in a reference direction, common drive electrodes formed on both side surfaces of each of the ejection grooves, and individual drive electrodes formed on both side surfaces of each of the non-ejection grooves. A cover plate is bonded to the upper surface of the piezoelectric body substrate and includes a liquid chamber communicating with the ejection grooves, first through electrodes which penetrate the cover plate in a thickness direction and are electrically connected to the individual drive electrodes, and individual terminals placed on a front surface of the cover plate opposite to the piezoelectric body substrate and electrically connected to the first through electrodes.
Abstract:
A liquid jet head includes a flow path member having a supply port through which liquid is supplied and a discharge port through which the liquid is discharged, and a cover plate having a liquid supply chamber that communicates with the supply port and a liquid discharge chamber that communicates with the discharge port. An actuator substrate has a plurality of parallel channels that extend between the liquid supply chamber and the liquid discharge chamber and the channels communicate with respective nozzles formed in a nozzle plate. The flow path member, cover plate, actuator substrate and nozzle plate constitute a laminated structure. A communication path is provided in one or both of the cover plate and flow path member for bypassing the liquid from the liquid supply chamber to the liquid discharge chamber so that air bubbles trapped in the liquid can be effectively discharged to the outside.
Abstract:
A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.
Abstract:
A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.
Abstract:
A method of manufacturing a head chip includes a groove forming step for forming grooves which are the bases of ejection grooves on a first surface of the actuator substrate, a substrate grinding step for grinding a second surface of the actuator substrate so that each of the grooves has a predetermined depth, a recessed portion forming step for forming an inspection recessed portion which changes its state in the second surface of the actuator substrate according to the grinding amount of the actuator substrate in the substrate grinding step, and a grinding amount determination step for determining the grinding amount of the actuator substrate on the basis of a state of the inspection recessed portion after the substrate grinding step.
Abstract:
The liquid jet head includes an ejecting portion which has a first head chip and a second chip which are laminated with each other, a circuit board which outputs a drive signal for driving the ejecting portion, a first connection board which electrically connects the first head chip and the circuit board to each other, and a second connection board which electrically connects the second head chip and the circuit board to each other. A bend portion is provided in the circuit board. By bending the circuit board at the bend portion, the first electrode terminal portion and the second electrode terminal portion are made to extend in the same direction, and face each other in the lamination direction of the first head chip and the second head chip.
Abstract:
A liquid jet head 1 including: an actuator substrate 2 having a plurality of elongated grooves 6 arrayed from an upper surface to a lower surface thereof. The grooves are formed from a vicinity of a peripheral end on one side of the actuator substrate to a peripheral end the other side thereof, ends of the grooves in a longitudinal direction thereof have respective inclined surfaces 22 rising from the lower surface to the upper surface of the actuator substrate, and a crossing angle at crossing portions at which the inclined surfaces and the lower surface cross each other is in a range of 3 degrees to 80 degrees.
Abstract:
A liquid jet head including: a nozzle plate including a first nozzle row and a second nozzle row each formed of a plurality of nozzles; and a piezoelectric plate including a plurality of first ejection grooves communicating to the plurality of nozzles of the first nozzle row, and a plurality of second ejection grooves communicating to the plurality of nozzles of the second nozzle row, in which each of the plurality of first ejection grooves and each of the plurality of second ejection grooves are separated from each other by a partition wall located between the each of the plurality of first ejection grooves and the each of the plurality of second ejection grooves.
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).