Inkjet recording head and recording apparatus using the same
AssigneeFuji Xerox Co., Ltd.
InventorsHirofumi Nakamura, Masakazu Okuda, Yasuhiro Otsuka
Life of this patent
Estimating the term…
Abstract
An inkjet recording head allowing a high driving efficiency and preventing a variation in the driving efficiency is disclosed. An piezoelectric actuator is provided for each ink nozzle and has a driving section disposed in an area of an ink pressure chamber, an electrode pad section, and at least one bridge section connecting the driving section and the electrode pad section. The pressure chamber has a plane shape having an aspect ratio approximately equal to 1, and the bridge section has a width of a connection area to the driving section set smaller than a width of a connection side of the driving section.
Claims29
An inkjet recording head comprising:
- a plurality of nozzles for jetting droplets of ink;
- a plurality of pressure chambers disposed for respective ones of the nozzles, wherein each of the pressure chambers has at least one wall formed as a diaphragm;
- a plurality of actuators, each of which is mechanically connected to a corresponding diaphragm;
- and
- an ink supply source for supplying ink to the pressure chambers through corresponding supply paths,
- wherein each of the actuators comprises:
- a driving section disposed in an area of a corresponding pressure chamber, wherein the driving section is deformed in flexure together with the corresponding diaphragm when a driving signal is applied;
- an electrode pad section disposed in an area corresponding to a side wall of the corresponding pressure chamber, for electrical connection of the driving section to a driving signal source;
- and
- at least one bridge section connecting the driving section and the electrode pad section,
- wherein each of the pressure chambers has a plane shape having an aspect ratio approximately equal to 1, and the bridge section has a width of a connection area to the driving section sat smaller than a width of a connection side of the driving section.
The inkjet recording head according to claim l6, wherein the wiring substrate comprises at least a resin substrate.
An actuator for deforming a diaphragm of a pressure chamber filled with ink to eject droplets of ink from a nozzle in an inkjet recording head, comprising:
- a driving section disposed in an area of the pressure chamber;
- an electrode pad section disposed an area corresponding to a side wall of the pressure chamber, for electrical connection of the driving section to a driving signal source;
- and
- at least one bridge section connecting the driving section end the electrode pad section,
- wherein the pressure chamber has a plane shape having an aspect ratio approximately equal to 1, and the bridge section has a width of a connection area to the driving section set smaller than a width of a connection side of the driving section.
Dependencies are inferred from the claim text.