Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.

Abstract: A liquid ejection head includes: an element-substrate to eject liquid according to an electrical signal; an electrical circuit substrate to send the electrical signal; and a body including the element-substrate on a first face and the electrical circuit substrate on a second face, in which the liquid ejection head is mounted in a mount unit of a liquid ejection apparatus via an electrical connector; the body includes a pressure-receiving portion for receiving a force including components in first and second directions; the liquid ejection head includes first and second positioning portions that determine a position of the body; and the first positioning portion is arranged at both outsides of an arrangement region of the element substrate; the second positioning portion is arranged at both sides of the second face; and the pressure-receiving portion is arranged at the both sides and an intermediate portion of the body.

Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.

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: 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 holding member for a liquid storage container includes: a mounting portion for removably mounting the liquid storage container through an opening along a predetermined direction; and a locking member for locking the mounted liquid storage container to the mounting portion by being fitted to the liquid storage container, wherein the mounting portion has a regulating portion for regulating inclination of a posture of the liquid storage container relative to the predetermined direction at the time of mounting the liquid storage container, the regulating portion being a portion provided such that a space between an inner surface of the mounting portion and an outer surface facing thereto of the liquid storage container is partially narrowed along a direction of insertion.

Abstract: A liquid ejection head includes a liquid ejection section including an element substrate having ejection ports for ejecting liquid and an electrical wiring substrate connected to a contact of the liquid ejection apparatus to transmit signals to the element substrate, a liquid tank loading section including a containing space for containing a liquid tank storing liquid to be supplied to the element substrate and a lock member having an engaging part for engaging with a holding part of the liquid tank and a fixation means for rigidly securing the liquid election section and the liquid tank loading section in position.

Abstract: A liquid ejection cartridge having a liquid ejection section for ejecting liquid includes an electrical contact section to be electrically connected to a terminal section of an apparatus main body, the electrical contact section being formed by a plurality of printed substrates arranged on a same surface.

Abstract: A holding member for a liquid storage container includes: a mounting portion for removably mounting the liquid storage container through an opening along a predetermined direction; and a locking member for locking the mounted liquid storage container to the mounting portion by being fitted to the liquid storage container, wherein the mounting portion has a regulating portion for regulating inclination of a posture of the liquid storage container relative to the predetermined direction at the time of mounting the liquid storage container, the regulating portion being a portion provided such that a space between an inner surface of the mounting portion and an outer surface facing thereto of the liquid storage container is partially narrowed along a direction of insertion.

Abstract: A liquid ejection head includes: an element-substrate to eject liquid according to an electrical signal; an electrical circuit substrate to send the electrical signal; and a body including the element-substrate on a first face and the electrical circuit substrate on a second face, in which the liquid ejection head is mounted in a mount unit of a liquid ejection apparatus via an electrical connector; the body includes a pressure-receiving portion for receiving a force including components in first and second directions; the liquid ejection head includes first and second positioning portions that determine a position of the body; and the first positioning portion is arranged at both outsides of an arrangement region of the element substrate; the second positioning portion is arranged at both sides of the second face; and the pressure-receiving portion is arranged at the both sides and an intermediate portion of the body.

Abstract: A liquid ejection head includes 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 that of the first liquid storing container. The wall of the liquid ejection head is provided with a rib extending in the height direction on the surface opposite to the surface mounted by the electrical wiring substrate; and the second loading section and the rib are 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 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 is 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 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 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: A liquid ejection cartridge having a liquid ejection section for ejecting liquid includes an electrical contact section to be electrically connected to a terminal section of an apparatus main body, the electrical contact section being formed by a plurality of printed substrates arranged on a same surface.

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 head includes a liquid ejection section including an element substrate having ejection ports for ejecting liquid and an electrical wiring substrate connected to a contact of the liquid ejection apparatus to transmit signals to the element substrate, a liquid tank loading section including a containing space for containing a liquid tank storing liquid to be supplied to the element substrate and a lock member having an engaging part for engaging with a holding part of the liquid tank and a fixation means for rigidly securing the liquid election section and the liquid tank loading section in position.

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 liquid ejection head includes a liquid ejection substrate having an ejection port surface, a support substrate for supporting the liquid ejection substrate, having two first positioning portions being in contact with an attaching portion, to which the liquid ejection head is attached, to determine the position of the liquid ejection head with respect to the attaching portion in a predetermined direction, and a housing for supporting the support substrate, having a second positioning portion being in contact with the attaching portion to determine the position of the liquid ejection head with respect to the attaching portion in the predetermined direction. A surface perpendicular to the ejection port surface and extending along the predetermined direction, having the second positioning portion, is disposed between two surfaces perpendicular to the ejection port surface and extending along the predetermined direction, each having one of the first positioning portions.