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    • 9. 发明申请
    • DROPLET EJECTION DEVICE AND PRINTER
    • US20090225139A1
    • 2009-09-10
    • US12398351
    • 2009-03-05
    • Takeshi KIJIMAShoichi IINO
    • Takeshi KIJIMAShoichi IINO
    • B41J2/045
    • B41J2/14274B41J2202/11
    • A droplet ejection device includes: a substrate having a first pressure chamber, a second pressure chamber, a third pressure chamber and a fourth pressure chamber extending in a first direction; a nozzle plate provided below the substrate, and having a first nozzle aperture continuous with the first pressure chamber, a second nozzle aperture continuous with the second pressure chamber, a third nozzle aperture continuous with the third pressure chamber, and a fourth nozzle aperture continuous with the fourth pressure chamber; a vibration plate provided above the substrate; a first piezoelectric element provided above the vibration plate and above the first pressure chamber; a second piezoelectric element provided above the vibration plate and above the second pressure chamber; a third piezoelectric element provided above the vibration plate and above the third pressure chamber; and a fourth piezoelectric element provided above the vibration plate and above the fourth pressure chamber, wherein, as viewed in a second direction orthogonal to the first direction, the first nozzle aperture is provided at a position that overlaps the third nozzle aperture, and provided at a position that does not overlap the second nozzle aperture and the forth nozzle aperture; the second nozzle aperture is provided at a position that overlaps the fourth nozzle aperture, and provided at a position that does not overlap the first nozzle aperture and the third nozzle aperture, as viewed in the second direction; the first piezoelectric element is provided at a position that overlaps the third piezoelectric element, and provided at a position that does not overlap the second piezoelectric element and the fourth piezoelectric element, as viewed in the second direction; and the second piezoelectric element is provided at a position that overlaps the fourth piezoelectric element, and provided at a position that does not overlap the first piezoelectric element and the third piezoelectric element.