Liquid ejecting head, liquid ejecting apparatus
AssigneeSeiko Epson Corporation
InventorsYuma Fukuzawa, Hiroshige Owaki
Life of this patent
Estimating the term…
Abstract
A liquid ejecting head includes a nozzle plate, a flow path forming substrate, and a communication plate between the nozzle plate and the substrate and having a communication hole connecting a nozzle and a first opening of a pressure chamber. The first opening extends in a direction perpendicular to an arrangement direction of the pressure chambers. The first opening has a narrowed portion close to the communication hole. The communication hole has at least three edge lines which extend in a penetration direction. The communication plate is bonded to the substrate such that the ends of the edge lines at a surface close to the substrate are covered with the substrate that defines the narrowed portion on a surface close to the communication plate.
Claims5
A liquid ejecting head comprising:
- a nozzle plate having a plurality of nozzles through which liquid is ejected;
- a flow path forming substrate having a plurality of pressure chambers which are arranged side by side in a first direction, each of the pressure chambers having a first opening provided on a bottom surface, and a piezoelectric element which is provided adjacent the pressure chamber;
- and
- a communication plate that is located between the nozzle plate and the flow path forming substrate and has a communication hole which communicates the nozzle and the first opening of the pressure chamber with each other, the nozzle plate, the flow path forming substrate and the communication plate being bonded to each other,
- wherein the first opening on the flow path forming substrate has a longitudinal direction in a second direction which is perpendicular to the first direction and extends from an ink supply side to the communication hole, and, in the longitudinal direction, the first opening has a narrowed portion at a portion close to the communication hole, the narrowed portion having an inner width of the pressure chamber in the first direction which is smaller than the inner width of a portion on the ink supply side, the communication hole of the communication plate has at least three edge lines which extend in a penetration direction, and the communication plate is bonded to the flow path forming substrate such that ends of the edge lines at a surface close to the flow path forming substrate are covered with the flow path forming substrate that defines the narrowed portion on a surface close to the communication plate.
Dependencies are inferred from the claim text.