Abstract: There are provided a head chip and so on capable of improving the print image quality while suppressing the manufacturing cost. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves, a nozzle plate having a plurality of nozzle holes, and a cover plate having a first through hole, a second through hole, and a wall part. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole.

Abstract: An embodiment of the present disclosure is a driving circuit for ejecting liquid from a plurality of nozzles in an ejecting section in a liquid ejecting head. The driving circuit includes a first signal generation section that generates a printing driving signal for ejecting the liquid from the nozzles, a second signal generation section that generates an inspection driving signal for inspecting a state of the ejecting section, and a control section that controls the first signal generation section and the second signal generation section so as to exclusively output one of the printing driving signal and the inspection driving signal to the ejecting section.

Abstract: A liquid jet head chip capable of exerting a stable ejection performance is provided. The liquid jet head chip is provided with an actuator plate and an electrode. The actuator plate has an obverse surface, a reverse surface, and two or more ejection channels which penetrate the actuator plate in a thickness direction from the obverse surface toward the reverse surface, which are disposed so as to be adjacent to each other at intervals in a first direction perpendicular to the thickness direction, and which are disposed so as to extend in a second direction perpendicular to both of the thickness direction and the first direction.

Abstract: There are provided a head chip and a method of manufacturing the same, a liquid jet head, and a liquid jet recording device each capable of suppressing a stray capacitance to improve the image quality. The head chip according to an embodiment of the present disclosure is a head chip having an actuator plate adapted to apply pressure to liquid to jet the liquid.

Abstract: A head chip capable of suppressing the degradation of the reliability, and a liquid jet head and a liquid jet recording device using the head chip are provided. The head chip includes an actuator plate having a plurality of ejection channels respectively communicated with nozzle holes and electrodes disposed on inner walls of the respective ejection channels, a bonded plate to be bonded to the actuator plate, and having a liquid contact surface which liquid entered the ejection channels has contact with, an adhesive layer disposed between the bonded plate and the actuator plate, and adapted to bond the bonded plate and the actuator plate to each other, and a protective film adapted to cover continuously from inner walls of the respective ejection channels to at least a part of the liquid contact surface via an end surface of the adhesive layer exposed on the ejection channel side.

Abstract: There is provided a liquid jet head and a liquid jet recording device capable of increasing available ink types. The liquid jet head according to an embodiment of the present disclosure is provided with an actuator plate having a plurality of ejection grooves, a nozzle plate having nozzle holes communicated with the ejection grooves, and a nozzle guard having a rib adapted to support the nozzle plate, and a communication hole adapted to communicate each of the first nozzle holes and an outside with each other. The rib has contact with the nozzle plate at a position which fails to be opposed to an opening on the nozzle plate side of each of the ejection grooves.

Abstract: Provided herein are a jet hole plate, a liquid jet head, a liquid jet recording apparatus, and a method for manufacturing a jet hole plate that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate having provided therein a plurality of jet holes. The metal substrate has a principal surface having outlets for the jet holes. The principal surface has a surface roughness (arithmetic mean roughness Ra) that is smaller in outlet edge regions of the jet holes than in surrounding regions around the outlet edge regions.

Abstract: There are provided a head chip, a liquid jet head, and a liquid jet recording device capable of enhancing the reliability. The head chip according to an embodiment of the disclosure is a head chip adapted to jet liquid including an actuator plate having a plurality of ejection grooves arranged side by side along a first direction, and extending in a second direction crossing the first direction, a plurality of common electrodes formed on respective inner surfaces of the plurality of ejection grooves, and a commonalization interconnection adapted to electrically connect the plurality of common electrodes to each other, and a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves.

Abstract: There are provided a head chip, a liquid jet head, and a liquid jet recording device capable of enhancing the reliability. The head chip according to an embodiment of the disclosure is a head chip adapted to jet liquid including an actuator plate having a plurality of ejection grooves and a plurality of non-ejection grooves alternately arranged in parallel to each other along a first direction and each extending in a second direction crossing the first direction, and a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves, and to be bonded to the actuator plate. The non-ejection grooves each partially open in a bonding surface of the actuator plate with the nozzle plate.

Abstract: Provided herein are a jet hole plate, a liquid jet head, and a liquid jet recording apparatus that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate provided with a plurality of jet holes. In the metal substrate, an average crystal grain size in outlet edges of the jet holes is smaller than that in surrounding regions around the outlet edges.

Abstract: There are provided a liquid jet head and a liquid jet recording device capable of enhancing the reliability. A liquid jet head according to an embodiment of the disclosure includes a liquid jet section from which liquid is jetted, an electronic control section electrically connected to the liquid jet section, a main protective member adapted to cover a periphery of the electronic control section, a connection section attached to the electronic control section and adapted to electrically connect an outside of the liquid jet head and the electronic control section to each other, and a connection section protective member configured so as to make a state transition between a protection state of covering the connection section and an exposure state of exposing the connection section.

Abstract: A head chip, a liquid jet head, and a liquid jet recording device capable of achieving the miniaturization while enhancing the reliability are provided. The head chip according to an embodiment of the disclosure includes an actuator plate having a plurality of ejection grooves arranged side by side in a first direction, a plurality of non-ejection grooves arranged side by side along the first direction, and individual electrodes respectively formed in the plurality of non-ejection grooves, a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves, and a cover plate adapted to cover the actuator plate. The cover plate has interconnection connecting sections respectively disposed in end part areas along a second direction perpendicular to the first direction, and adapted to electrically connect a plurality of individual interconnections electrically connected to the individual electrodes to an interconnection board outside the head chip.

Abstract: There are provided a head chip, a liquid jet head, and a liquid jet recording device capable of improving the ejection stability. The head chip according to an embodiment of the disclosure includes an actuator plate having a plurality of ejection grooves each filled with liquid, a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves, and a cover plate having a through hole through which the liquid flows into and/or from the ejection groove, and a wall part adapted to cover the ejection groove. A flow channel of the liquid in a part adapted to communicate the through hole and the ejection groove with each other includes a principal flow channel section, and an expanded flow channel section provided to the wall part, and adapted to increase a cross-sectional area of the flow channel.

Abstract: There are provided a liquid jet head capable of dealing with jet of a variety of types of liquid, and at the same time superior in easiness in handling. The liquid jet head includes a main body part having a liquid jet head chip and a cooling section, and an inflow side connection unit and an outflow side connection unit each configured so as to selectively be attached to and detached from the main body part. As the inflow side connection unit, it is possible to select the first inflow side cover unit and the second inflow side cover unit. As the outflow side connection unit, it is possible to select the first outflow side cover unit and the second outflow side cover unit.

Abstract: A liquid jet head includes a plurality of nozzles adapted to jet liquid, a piezoelectric actuator having a plurality of pressure chambers communicated individually with the nozzles and each filled with the liquid, and adapted to change a capacity of each of the pressure chambers, and a control section adapted to apply at least one pulse signal to the piezoelectric actuator to thereby expand and contract the capacity of the pressure chambers to jet the liquid filling the pressure chamber. The pressure chambers adjacent to each other of the plurality of the pressure chambers are set so as to belong to a plurality of groups different from each other. The control section makes the pulse signals different in timing between the plurality of groups and sets a shift amount of the timing in the pulse signals between the respective groups.

Abstract: Reduction of the size of the droplet in 1-drop ejection is easily performed. A liquid jet head according to an example of the disclosure includes a nozzle adapted to jet a liquid, a piezoelectric actuator having a pressure chamber communicated with the nozzle and filled with the liquid, and adapted to vary a capacity of the pressure chamber, and a control section adapted to apply a pulse signal to the piezoelectric actuator to thereby expand and contract the capacity of the pressure chamber so as to jet the liquid filling the pressure chamber. The control section applies the pulse signal adapted to expand the capacity in the pressure chamber when jetting 1 drop of the liquid so as to include a first pulse signal having a pulse width one of equal to or shorter than an on-pulse peak, and a second pulse signal disposed with a predetermined time interval from the first pulse signal.

Abstract: A liquid jet head and a liquid jet recording device capable of accurately detecting the temperature of the ink are provided. A liquid jet head according to an embodiment of the disclosure includes a flow channel member provided with a flow channel of a liquid, and having a high heat conduction part disposed so as to have contact with the liquid flowing inside the flow channel, and a low heat conduction part having lower thermal conductivity than thermal conductivity of the high heat conduction part, a temperature detection element disposed outside the flow channel, and attached to the high heat conduction part, and a liquid jet section from which the liquid is jetted.

Abstract: An object of the invention is to provide a liquid jet head and a liquid jet device each capable of improving the print quality even in the case in which an error occurs in the print data. The liquid jet head includes a receiving section adapted to receive print data, a discriminant section adapted to discriminate whether or not the print data received is non-defective, and a control section adapted to hold the print data in a case in which the print data is non-defective, or perform printing based on the print data held currently without holding the print data received in a case in which the print data received is defective.

Abstract: According to an embodiment, an ink jet head includes a pair of actuator plates, a return plate, and a flow passage plate. The pair of actuator plates are disposed to face each other in a Y-direction. In the actuator plate, a plurality of channels which extend in a Z-direction are arranged at a distance in an X-direction. The return plate is disposed on an opening end side of the channels in the pair of actuator plates. A circulation passage which communicates with the channels is formed in the return plate. The flow passage plate is disposed between the pair of actuator plates. An inlet flow passage into which an ink flows and an outlet flow passage which communicates with the circulation passage are arranged in the Z-direction.

Abstract: According to an embodiment, an ink jet head (liquid ejecting head) includes an actuator plate and a cover plate (see FIG. 8). As illustrated in FIG. 1, channel grooves for a discharge channel (ejection channel) and a non-discharge channel (non-ejection channel) in a Z-direction are formed on a front surface of the actuator plate, so as to be alternately arranged in an X-direction, by cutting with a dicing blade or the like. The discharge channel and the non-discharge channel are formed to have a groove width W of smaller than 70 ?m, in order to correspond to high density of nozzles. In the embodiment, the discharge channel and the non-discharge channel are formed to have a groove width of 55 ?m, 50 ?m, or 40 ?m, for example.