US 2003/0210306 A1 · Droplet-jetting device with pressure chamber expandable by elongation of pressure-generating section

Abstract

A droplet-jetting device, which is usable for an ink-jet recording apparatus, comprises a pressure chamber disposed between a cavity plate and a pressure-generating section of a piezoelectric actuator. The pressure-generating section and the cavity plate are connected by a connecting section. When a voltage is applied to the piezoelectric actuator, the pressure-generating section is elongated to depress the bottom of the pressure chamber downwardly so that the volume of the pressure chamber is increased. The droplet-jetting device is realized, in which the area of arrangement of the pressure-generating section is decreased to suppress the electrostatic capacity and the pull-eject can be performed by applying the voltage only when the device is driven.

Claims23

Dependent claims

A droplet-jetting device comprising a nozzle which jets a liquid, a pressure chamber which supplies the liquid to the nozzle, and a pressure-generating section which applies a pressure to the pressure chamber in order to jet the liquid from the nozzle, wherein:

a wall surface, which defines the pressure chamber, is displaceable to vary a volume of the pressure chamber;
and
the droplet-jetting device further comprises a connecting section which connects the pressure-generating section to the wall surface to transmit displacement of the pressure-generating section to the wall surface.

Dependencies are inferred from the claim text.

Facts

Application

10/434,792Filed 8 May 2003

Priority

JP 2002-1335969 May 2002

Published

13 Nov 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B41J 2/14209
Structure of print heads with piezoelectric elements: of finger type, chamber walls consisting integrally of piezoelectric material
B41J 2/14233
Structure of print heads with piezoelectric elements: of film type, deformed by bending and disposed on a diaphragm
B41J 2/14274
Structure of print heads with piezoelectric elements: of stacked structure type, deformed by compression/extension and disposed on a diaphragm
B41J 2002/14225
Of finger type, chamber walls consisting integrally of piezoelectric material: finger type piezoelectric element on only one side of the chamber

Droplet-jetting device with pressure chamber expandable by elongation of pressure-generating section

Life of this patent

Droplet-jetting device with pressure chamber expandable by elongation of pressure-generating section

Life of this patent

Abstract

Claims23