Liquid ejection head, liquid ejection apparatus, and image forming apparatus
AssigneeFUJIFILM Corporation
InventorKanji Nagashima
Life of this patent
Estimating the term…
Abstract
The liquid ejection head includes: a plurality of liquid ejection ports; a plurality of pressure chambers which are respectively communicated with the liquid ejection ports; a diaphragm which configures at least one surface of each of the pressure chambers; and a plurality of piezoelectric elements which are disposed on a surface of the diaphragm opposite from the pressure chamber, and from which at least individual electrodes are separated in an area corresponding to the pressure chamber, wherein liquid is ejected from the liquid ejection port by causing the plurality of piezoelectric elements to make vibration.
Claims26
A liquid ejection head, comprising:
- a plurality of liquid ejection ports;
- a plurality of pressure chambers which are respectively communicated with the liquid ejection ports;
- a diaphragm which configures at least one surface of each of the pressure chambers;
- and
- a plurality of piezoelectric elements which are disposed on a surface of the diaphragm opposite from the pressure chamber, and from which at least individual electrodes are separated in an area corresponding to the pressure chamber, wherein:
- each of the pressure chambers has an inclined inner wall forming substantially a funnel shape such that a cross sectional area becomes smaller toward the liquid ejection port;
- and
- liquid is ejected from the liquid ejection port by causing the plurality of piezoelectric elements to make vibration.
A liquid ejection head, comprising:
- a plurality of liquid ejection ports;
- a plurality of pressure chambers which are respectively communicated with the liquid ejection ports;
- a diaphragm which configures at least one surface of each of the pressure chambers;
- and
- a plurality of piezoelectric elements which are disposed on a surface of the diaphragm opposite from the pressure chamber, and from which at least individual electrodes are separated in an area corresponding to the pressure chamber,
- wherein liquid is ejected from the liquid ejection port by causing the plurality of piezoelectric elements to make vibration,
- wherein the vibration is ultrasonic vibration, and
- wherein a thickness of a piezoelectric substance of the piezoelectric element is one-fourth or one-half of a sonic wavelength in the piezoelectric substance of a drive frequency of the ultrasonic vibration.
A liquid ejection head, comprising:
- a liquid ejection port;
- a pressure chamber which communicates with the liquid ejection port;
- and
- a plurality of piezoelectric elements corresponding to the pressure chamber, wherein:
- the pressure chamber has an inclined inner wall forming substantially a funnel shape such that a cross sectional area becomes smaller toward the liquid ejection port;
- and
- liquid is ejected from the liquid ejection port by causing the plurality of piezoelectric elements to pressurize the pressure chamber.
Dependencies are inferred from the claim text.