Abstract: A liquid discharging head includes a recording element substrate configured to discharge a liquid; an electric wiring substrate that is provided with a lead terminal that is connected to the recording element substrate; and a supporting member to which the electric wiring substrate is bonded. The electric wiring substrate is bonded to the supporting member with two or more types of adhesives including at least a first adhesive and a second adhesive whose volume resistivity is higher than that of the first adhesive, a bond strength of the first adhesive is higher than a bond strength of the second adhesive, and, at the supporting member, the second adhesive is applied such that the second adhesive is provided closer to the lead terminal than the first adhesive.

Abstract: A liquid ejection head includes a recording element substrate for ejecting liquid, a mounting section to be loaded with a liquid container, and a connector equipped with a contact spring capable of expanding and contracting in an axial direction to be brought into contact with a contact substrate provided on the liquid container. The axial direction of the contact spring being inclined relative to the direction of loading the liquid container in the mounting section.

Abstract: There are provided a liquid ejecting head and a support member that can achieve both of breakage avoidance of a print element substrate and deformation suppression of the support member. Therefore a plate thickness of an adhesion part in the support member is thinner that a plate thickness of a main surface other than the adhesion part.

Abstract: A liquid ejection head includes a recording element substrate that ejects liquid; an electric wiring substrate electrically connected with the recording element substrate; a support member having a recess that houses the recording element substrate; and a sealant that seals an electric connection part between both the substrates. The support member has a projection-shaped adhesive application surface at a bottom surface of the recess, on which an adhesive for bonding the recording element substrate is applied; and a projection projecting from an inner side surface of the recess near the electric connection part toward the adhesive application surface, which has a first region that is covered with the recording element substrate, and a second region extending from the first region to the projection having a wall formed of the adhesive and closing a gap between the projection and a side surface of the recording element substrate facing the projection.

Abstract: A liquid ejection head with high environmental reliability which suppresses a crack of a Si substrate and peeling-off of an ejection port forming member by relaxing a residual stress in a printing element substrate and a manufacturing method of a liquid ejection head are provided. For that purpose, after the printing element substrate is bonded and fixed to a support member, the support member is screwed and fixed through an elastic member.

Abstract: A liquid ejection head including: an ejection section for ejecting liquid; an electrical wiring substrate having terminals to be electrically connected to the respective electrical contacts of a liquid ejection apparatus; a first loading section to be loaded with a first liquid storing container; and a second loading section to be loaded with a second liquid storing container having a width greater than the first liquid storing container; the wall of the liquid ejection head being provided with a rib extending in the height direction on the surface opposite to the surface mounted by the electrical wiring substrate; the second loading section and the rib being arranged at respective positions where the second loading section and the rib overlap with each other as viewed in the direction of loading the second liquid storing container in the second loading section.

Abstract: A liquid ejection apparatus includes a liquid supply member having a plurality of liquid supply passages, a connecting surface having a plurality of connecting portions connected to the liquid supply passages, a first positioning portion configured to determine relative positions between the liquid supply passages and the connecting portions in one direction along the connecting surface, and a second positioning portion configured to determine relative positions between the liquid supply passages and the connecting portions in the one direction and an other direction perpendicular to the one direction. A first distance between centers of gravity of the first positioning portion and the connecting portion farthest from the first positioning portion is longer than a second distance between centers of gravity of the second positioning portion and the connecting portion farthest from the second positioning portion.

Abstract: A method of making a liquid supply member includes preparing a transparent member including a first surface having a first opening portion and an absorption member including a second surface having a second opening portion, making the transparent member and the absorption member contact each other at a contact portion so that the first opening portion and the second opening portion overlap each other with respect to an intersecting direction that intersects the first surface and the second surface, and forming a first supply path by welding the transparent member and the absorption member to each other by irradiating the contact portion with a laser beam, the first supply path including the first opening portion and the second opening portion and being a path through which liquid flows in the intersecting direction, wherein a space is formed between the contact portion and the first supply path and between the first surface and the second surface.

Abstract: The invention stabilizes a posture of a liquid discharge head when mounting the liquid discharge head with respect to a mount section of a liquid discharge apparatus and improves the mountability thereof. The liquid discharge head includes a grasp portion provided with a surface extending along a first direction as a direction of disposition of a plurality of discharge ports and extending along a second direction intersecting the discharge port surface and used for grasping the liquid discharge head. The surface of the grasp portion is provided at a position not overlapped in the direction vertical to the discharge port surface with a center axis passing in a third direction which is vertical to the first direction and extending along the discharge port surface through the center of gravity of the liquid discharge head in the first direction.

Abstract: To provide an inkjet head which includes high-density nozzle rows and which does not easily cause an ejection failure due to adhesion of ink mist around ejection orifices when a high-density image of a secondary color is printed with a small number of paths. An inkjet head includes at least two or more types of nozzle rows that eject different amounts of ink. When A is the cross section, with respect to an ink supplying direction, of an ink supply path from each ejection orifice to a supply port and L is the length of the ink supply path, the value of A/L differs between the two or more types of nozzle rows. The nozzle row of which the value of A/L is small is disposed outside an area between the nozzle rows that eject a largest amount of ink and that are arranged next to each other.

Abstract: A liquid ejection apparatus includes a liquid supply member having a plurality of liquid supply passages, a connecting surface having a plurality of connecting portions connected to the liquid supply passages, a first positioning portion configured to determine relative positions between the liquid supply passages and the connecting portions in one direction along the connecting surface, and a second positioning portion configured to determine relative positions between the liquid supply passages and the connecting portions in the one direction and an other direction perpendicular to the one direction. A first distance between centers of gravity of the first positioning portion and the connecting portion farthest from the first positioning portion is longer than a second distance between centers of gravity of the second positioning portion and the connecting portion farthest from the second positioning portion.

Abstract: A method of making a liquid supply member includes a preparation step of preparing a transparent member including a first surface having a first opening portion and an absorption member including a second surface having a second opening portion, a contact step of making the transparent member and the absorption member contact each other at a contact portion so that the first opening portion and the second opening portion overlap, and a welding step of forming a first supply path by welding the transparent member and the absorption member to each other by irradiating the contact portion with a laser beam, the first supply path including the first opening portion and the second opening portion, wherein, after the contact step and before the welding step, a space is formed between the contact portion and the first supply path and between the first surface and the second surface.

Abstract: To provide an inkjet head which includes high-density nozzle rows and which does not easily cause an ejection failure due to adhesion of ink mist around ejection orifices when a high-density image of a secondary color is printed with a small number of paths. An inkjet head includes at least two or more types of nozzle rows that eject different amounts of ink. When A is the cross section, with respect to an ink supplying direction, of an ink supply path from each ejection orifice to a supply port and L is the length of the ink supply path, the value of A/L differs between the two or more types of nozzle rows. The nozzle row of which the value of A/L is small is disposed outside an area between the nozzle rows that eject a largest amount of ink and that are arranged next to each other.