Liquid ejecting head and liquid ejecting apparatus
AssigneeSeiko Epson Corporation
InventorsHiroshi Ito, Yasumi Ikehara, Jiro Kato, Hiroyuki Tomimatsu
Life of this patent
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Abstract
A liquid ejecting head comprises a pressure generation chamber communicating with a nozzle opening, a vibrating wall provided as one surface of the pressure generation chamber and vibrates so that ejects the liquid from the nozzle opening, and a resin portion having a recessed arc-shape and formed in a corner of the pressure generation chamber and formed of a resin material having a Young's modulus of less than or equal to 10 GPa. A ratio r/w of a radius r of the surface of the resin portion to a width w of the pressure generation chamber defined by the vibrating wall is greater than or equal to 0.017 and less than or equal to 0.087.
Claims17
A liquid ejecting head, comprising:
- a pressure generation chamber communicating with a nozzle opening, wherein partition walls define a sidewall surface of the pressure generation chamber and a vibrating wall that vibrates so as to eject liquid from the nozzle opening defines a top surface of the pressure generation chamber, the pressure generation chamber having a defined corner wherein the partition walls are in direct contact with the vibrating wall;
- and
- a resin portion having a recessed arc-shape and formed along the defined corner of the pressure generation chamber and formed of a resin material having a Young's modulus of less than or equal to 10 GPa,
- wherein a ratio r/w of a radius r of the surface of the resin portion to a width w of the pressure generation chamber defined by the vibrating wall is greater than or equal to 0.017 and less than or equal to 0.087.
A liquid ejecting head, comprising:
- a pressure generation chamber communicating with a nozzle opening, wherein partition walls define a sidewall surface of the pressure generation chamber and a vibrating wall that vibrates so as to eject liquid from the nozzle opening defines a top surface of the pressure generation chamber, the pressure generation chamber having a defined corner where the partition walls meet the vibrating wall;
- a resin portion having a recessed arc-shape and formed along the defined corner of the pressure generation chamber and formed of a resin material having a Young's modulus of less than or equal to 10 GPa,
- wherein a ratio r/w of a radius r of the surface of the resin portion to a width w of the pressure generation chamber defined by the vibrating wall is greater than or equal to 0.017 and less than or equal to 0.087
- wherein the partition walls contact the vibrating wall through an adhesive of a different material than a material that forms the resin portion.
A liquid ejecting head, comprising:
- a pressure generation chamber communicating with a nozzle opening, wherein partition walls define a sidewall surface of the pressure generation chamber and a vibrating wall that vibrates so as to eject liquid from the nozzle opening defines a top surface of the pressure generation chamber, the pressure generation chamber having a defined corner where the partition walls contact the vibrating wall, wherein the partition walls contact the vibrating wall through an adhesive;
- a resin portion having a recessed arc-shape and formed along the defined corner of the pressure generation chamber and formed of a resin material having a Young's modulus of less than or equal to 10 GPa,
- wherein a ratio r/w of a radius r of the surface of the resin portion to a width w of the pressure generation chamber defined by the vibrating wall is greater than or equal to 0.017 and less than or equal to 0.087,
- wherein the resin portion is discontinuous with the adhesive between the partition walls and the vibrating wall.
Dependencies are inferred from the claim text.