Inkjet recording head and inkjet recording device
AssigneeFuji Xerox Co., Ltd.
InventorsShinji Seto, Shigeru Umehara, Torahiko Kanda
Life of this patent
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Abstract
Opposing piezoelectric elements bordering a boundary between neighboring nozzle groups have point symmetry. Hence, even if a gap is opened up between actuator units due to necessity in assembly, rows of the nozzles are not offset. Accordingly, even a series of nozzle groups are combined in a conveyance direction of a recording medium, width of an inkjet recording head is not increased. Further, because the rows of nozzles are not offset, there is no requirement to offset discharge timings for each actuator unit, and output of image data does not become complex. Thus, lengthening can basically be implemented with two piezoelectric plates. Consequently, production yields can be improved.
Claims20
An inkjet recording head which scans in a direction intersecting a conveyance direction of a recording medium and records an image on the recording medium with ink drops ejected from nozzles, the inkjet recording head comprising:
- a nozzle plate in which the nozzles which eject the ink drops are formed;
- pressure chambers communicating with the nozzles;
- actuators abutting at the pressure chambers, which at least one of increase and reduce pressures of ink in the pressure chambers;
- and
- a nozzle row parallel to the conveyance direction of the recording medium,
- wherein the inkjet recording head includes a plurality of nozzle groups structured by dividing up the nozzle row, and
- the nozzles of the nozzle row include opposing nozzles which are disposed at a boundary between neighboring nozzle groups which neighbor in the row direction of the nozzle row, the actuators include opposing actuators, which respectively correspond to the opposing nozzles, and actuators within the nozzle groups, which respectively correspond to nozzles neighboring the opposing nozzles in the row direction, and a separation between the opposing actuators disposed at the boundary is equal to or greater than separations between the opposing actuators and the actuators neighboring the opposing actuators in the row direction within the nozzle groups.
An inkjet recording head which records an image with ink drops ejected from nozzles over a width of a recording medium which is being conveyed, the inkjet recording head comprising:
- a nozzle plate in which the nozzles which eject the ink drops are formed;
- pressure chambers communicating with the nozzles;
- actuators abutting at the pressure chambers, which at least one of increase and reduce pressures of ink in the pressure chambers;
- and
- a nozzle row in a direction intersecting the conveyance direction of the recording medium,
- wherein the inkjet recording head includes a plurality of nozzle groups structured by dividing up the nozzle row, and
- the nozzles of the nozzle row include opposing nozzles which are disposed at a boundary between neighboring nozzle groups which neighbor in the row direction of the nozzle row, the actuators include opposing actuators, which respectively correspond to the opposing nozzles, and actuators within the nozzle groups, which respectively correspond to nozzles neighboring the opposing nozzles in the row direction, and a separation between the opposing actuators disposed at the boundary is equal to or greater than separations between the opposing actuators and the actuators neighboring the opposing actuators in the row direction within the nozzle groups.
An inkjet recording head which scans in a direction intersecting a conveyance direction of a recording medium and records an image on the recording medium with ink drops ejected from nozzles, the inkjet recording head comprising:
- a nozzle plate in which the nozzles which eject the ink drops are formed;
- pressure chambers communicating with the nozzles;
- actuators abutting at the pressure chambers, which at least one of increase and reduce pressures of ink in the pressure chambers;
- and
- a nozzle row parallel to the conveyance direction of the recording medium,
- wherein the inkjet recording head includes a plurality of nozzle groups structured by dividing up the nozzle row, and positions of the actuators within the nozzle groups include point symmetry, with a center of the nozzle group as the point of symmetry thereof.
An inkjet recording head which records an image with ink drops ejected from nozzles over a width of a recording medium which is being conveyed, the inkjet recording head comprising:
- a nozzle plate in which the nozzles which eject the ink drops are formed;
- pressure chambers communicating with the nozzles;
- actuators abutting at the pressure chambers, which at least one of increase and reduce pressures of ink in the pressure chambers;
- and
- a nozzle row in a direction intersecting the conveyance direction of the recording medium,
- wherein the inkjet recording head includes a plurality of nozzle groups structured by dividing up the nozzle row, and positions of the actuators within the nozzle groups include point symmetry, with a center of the nozzle group as the point of symmetry thereof.
Dependencies are inferred from the claim text.