Abstract: A liquid jet head includes an actuator substrate having ejection grooves and non-ejection grooves partitioned by walls each including a piezoelectric body. The non-ejection grooves have, at ends on one side thereof, respective inclined surfaces rising from bottom surfaces thereof to upper surface openings at upper portions thereof. Common electrodes are provided in a strip form along a longitudinal direction of the walls on both side surfaces of the walls facing the ejection grooves, and active electrodes are provided in a strip form along the longitudinal direction of the walls on both side surfaces of the walls facing the non-ejection grooves. The active electrodes extend from positions in the vicinity of the ends on one side of the non-ejection grooves to ends on the other side thereof.

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 an actuator substrate partitioned by elongated walls of a piezoelectric body and having elongated ejection grooves and elongated non-ejection grooves alternately arrayed thereon so as to penetrate the actuator substrate from an upper surface through a lower surface thereof; a cover plate provided on the upper surface and having first slits communicating with the ejection grooves on one side and second slits communicating with the ejection grooves on the other side; and a nozzle plate provided on the lower surface and having nozzles communicating with the ejection grooves. The non-ejection grooves extend, on the other side, up to a second-side peripheral end of the actuator substrate, and the actuator substrate is left to form raised bottom portions on bottoms of the non-ejection grooves near the second-side peripheral end.

Abstract: A head chip for a liquid jet head of a recording apparatus has liquid jet channels arranged in a longitudinal direction of the head chip, and nozzle holes that communicate with the liquid jet channels. A flow path plate covers the liquid jet channels and has first and second circulation paths that extend in the longitudinal direction of the head chip and communicate with the liquid jet channels to supply liquid thereto. First and second inflow ports are provided at opposite longitudinal ends of the head chip for inflowing liquid into the first and second circulation paths, respectively, so that liquid flows through the first and second circulation paths in opposite directions while being supplied to the liquid jet channels. The sum of pressures of liquid supplied to each liquid jet channel from the first and second circulation paths is uniform throughout the longitudinal direction of the head chip so that high image quality is realized.

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: In a method of manufacturing a liquid jet head, a piezoelectric substrate is bonded onto a first base. Ejection grooves for ejection channels and dummy grooves for dummy channels are alternately formed in parallel with one another. The ejection grooves and the dummy grooves have such a depth as to pierce the piezoelectric substrate and to reach the first base substrate. An electrode material is deposited on inner surfaces of the ejection grooves and the dummy grooves. A cover plate is bonded to the piezoelectric substrate so as to cover the ejection grooves and the dummy grooves. In a subsequent first base substrate removing step, a part of the first base substrate on a side opposite to the cover plate and the electrode material deposited on bottom surfaces of the dummy grooves are removed. A second base substrate is then bonded to the first base substrate.

Abstract: Provided is a liquid jet head in which a region of the liquid jet head on a side opposite to a liquid ejection side thereof is thinned to enhance efficiency of use of the region. A liquid jet head (1) includes an ejecting portion (3) for ejecting liquid in which first and second head chips (2a and 2b) are stacked, a circuit board (4) for supplying a drive signal for driving the ejecting portion (3), a first flexible printed circuit board (5a) for electrically connecting the first head chip (2a) and the circuit board (4) to each other, and a second flexible printed circuit board (5b) for electrically connecting the second head chip (2b) and the circuit board (4) to each other. The circuit board (4) and each of the first and second flexible printed circuit boards (5a and 5b) are electrically connected to each other on one surface (S) of the circuit board (4).

Abstract: Individual electrode pads to be connected to individual electrodes are formed on a first principal face of an actuator substrate at a +X side end thereof. Common electrode pads to be connected to common electrodes are formed on a ?X side with respect to the individual electrode pads on the first principal face of the actuator substrate. A groove is formed along a Y direction between the individual electrode pads and the common electrode pads on the first principal face of the actuator substrate.

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: The liquid jet head includes a nozzle guard as a liquid storage unit configured to store the residual liquid attaching to the nozzle plate. Channel lines include a dummy channel incapable of driving. Liquid is supplied into the dummy channel while being brought to a negative pressure. The nozzle plate includes a dummy nozzle hole communicated with the dummy channel. The dummy nozzle hole is formed at a position to aspirate the residual liquid stored using the nozzle guard.

Abstract: In a head chip, a cover plate includes a positioning reference provided at a position facing at least one of nozzle holes through at least one liquid jet channel. The positioning reference can be detected from underneath the nozzle plate through the nozzle hole and the liquid jet channel. A method of manufacturing the head chip includes a positioning step for positioning the nozzle plate by detecting the positioning reference provided in the cover plate.

Abstract: The liquid jet head includes an actuator substrate on which a plurality of grooves is arranged, and a nozzle plate having nozzle holes communicated with the grooves. Drive electrodes extending in an X direction and insulating films covering a part of both side surfaces of a wall portion are installed on both of the side surfaces of the wall portion. Each of the drive electrodes are installed on the surface of the wall portion around the nozzle hole 11 and holds the insulating films with the wall portion at both of the X-direction ends.

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 pressure damper has a main body with a recessed section for storing liquid. A thin film is mounted to the main body so as to hermetically seal the recessed section. A reference member is arranged in the recessed section of the main body and is configured to be brought into contact with or separated from the thin film. A detecting unit is configured to detect, without contacting the reference member, a displacement of the reference member due to a pressure change of the liquid stored in the recessed portion of the main body.

Abstract: A liquid jet head has a head chip including channels and nozzle holes communicating with respective ones of the channels. The channels have sidewalls each provided with a drive electrode. A temperature sensor is configured to detect a temperature of a liquid in the channels. A drive voltage value setting device is electrically connected to the temperature sensor for determining a magnitude of a drive voltage based on the temperature of the liquid detected by the temperature sensor. A control device performs a control operation that applies a drive voltage of the magnitude determined by the drive voltage value setting device to the drive electrodes of the head chip so as to increase a pressure in each of the channels by deformation of the side walls to thereby discharge the liquid in the channels from the respective nozzle holes.

Abstract: A liquid jet head is provided with an actuator substrate partitioned by elongated walls of a piezoelectric body and having elongated ejection grooves and elongated non-ejection grooves alternately arrayed thereon so as to penetrate the actuator substrate from an upper surface through a lower surface thereof; a cover plate provided on the upper surface and having first slits communicating with the ejection grooves on one side and second slits communicating with the ejection grooves on the other side; and a nozzle plate provided on the lower surface and having nozzles communicating with the ejection grooves. The non-ejection grooves extend, on the other side, up to a second-side peripheral end of the actuator substrate, and the actuator substrate is left to form raised bottom portions on bottoms of the non-ejection grooves near the second-side peripheral end.

Abstract: A liquid jet head according to an embodiment of the present invention includes an actuator substrate having slender ejection grooves and slender non-ejection grooves partitioned by slender walls each including a piezoelectric body. The non-ejection grooves have, at ends on one side thereof, respective inclined surfaces rising from bottom surfaces thereof to upper surface openings at upper portions thereof, common electrodes are provided in a strip form along a longitudinal direction of walls on both side surfaces of the walls facing the ejection grooves, active electrodes are provided in a strip form along the longitudinal direction of the walls on both side surfaces of the walls facing the non-ejection grooves, and the active electrodes are provided from positions in the vicinity of the ends on one side of the non-ejection grooves to ends on the other side thereof.

Abstract: A liquid jet head is provided with an actuator substrate which is partitioned by elongated walls of piezoelectric body and has elongated grooves arrayed thereon so as to penetrate the substrate from an upper surface through a lower surface thereof, a cover plate which is attached to the substrate so as to cover upper surface openings of the grooves and has a liquid supply chamber which supplies liquid to the grooves, and a nozzle plate which is attached to the substrate so as to cover lower surface openings of the grooves and has nozzles communicating with the respective grooves. Drive electrodes are formed in strip form on side surfaces of the walls along the longitudinal direction thereof so as to be separated from the nozzle plate. The nozzle plate has a lower stiffness than the cover plate.

Abstract: A liquid jet head according to an embodiment of the present invention includes an actuator substrate formed by arraying a plurality of grooves, which penetrates from an upper surface to a lower surface of the actuator substrate and is long in a surface direction, a cover plate provided at the actuator substrate so as to cover an upper surface opening of the groove, and a nozzle plate provided at the actuator substrate so as to cover a lower surface opening of the groove. The groove includes an ejection groove and a non-ejection groove which are alternately arrayed, and is formed in such a manner that configurations of the lower surface openings of the ejection groove and the non-ejection groove are different.