A head unit (51) includes a recording head (52), a frame (53), and an angle adjusting portion (8). The frame (53), to which the recording head (52) is rotatably connected, has a side wall (531) to be adjacent to the recording head (52). The angle adjusting portion (8) includes frame and head adjusting screws (81, 82) and rotates the recording head (52). The frame adjusting screw (81) is on the side wall (531), on its face opposite the recording head (52), and can reciprocate toward and away from the recording head (52). The head adjusting screw (82) is on the recording head (52), on its face opposite the side wall (531), and can reciprocate toward and away from the side wall (531). The frame and head adjusting screws (81, 82) make contact with each other at their tip end parts in the direction in which they face each other.

A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

A liquid jet head includes: a head chip including a channel to be filled with ink; a manifold that supports the head chip and includes an ink flow path communicating with the ejection channel; and a heater and a drive board that are supported on the manifold and heat ink inside the ink flow path. The ink flow path extends in a meandering manner.

Provided are a printing device and a print element substrate having a detection element row provided in correspondence to an ejection port row and capable of suppressing an increase in a length in an ejection port row direction. For that purpose, a row selection circuit 117 is provided in a detection element circuit 108, and a row of the detection element circuit is selected by row selection signals A0 and A1 transmitted through a common wiring.

A liquid ejecting head has a nozzle forming surface to which a nozzle section through which liquid is ejected is open, wherein an electrostatic propensity of the nozzle section due to contact with the liquid is lower than an electrostatic propensity of the nozzle forming surface due to contact with the liquid. The amount of fluorine per unit area in the nozzle section is smaller than the amount of fluorine per unit area in the nozzle forming surface.

A liquid discharge head includes a recording element board including a discharge port for discharging liquid, a channel member including a channel for supplying the liquid to the recording element board, and supporting the recording element board, a first supporting portion fixed to the channel member on one end side of the channel member in a longitudinal direction, and a second supporting portion fixed to the channel member on another end side of the channel member in the longitudinal direction, and a first member supported by the first supporting portion and the second supporting portion. The first supporting portion supports the first member in such a manner that the first member is movable in the longitudinal direction relative to the first supporting portion.

A printing element substrate includes a substrate, an energy generating element, and an ejection-port formed member. The energy generating element is disposed on one surface of the substrate and configured to generate energy for use in ejecting liquid. The ejection-port formed member includes ejection ports that eject the liquid. A protrusion protruding toward inside of each of the ejection ports is provided on an inner surface of the ejection port. In a surface of the ejection-port formed member remote from the substrate, a tip portion of the protrusion is positioned closer to the substrate than an outer periphery of the ejection port.

A head unit includes: a head having a nozzle surface spreading in a first direction and a second direction crossing the first direction, the nozzle surface having a nozzle row along the first direction; a tank fluidly connected to the head; a substrate electrically connected to the head; a casing containing the head, the tank and the substrate; and an edge member defining an opening through which a tube fluidly connectable to the tank and a wiring electrically connectable to the substrate pass, the edge member being detachably attachable with respect to the casing, wherein the edge member is attachable with respect to the casing selectively in a first state in which the opening faces in a third direction crossing the first direction and the second direction and a second state in which the opening faces in the first direction.

A liquid ejecting head includes a liquid discharge unit with a pressure generating chamber group which communicates with a nozzle disposed on a nozzle surface and is formed from pressure generating chambers disposed in a first direction, and a case member which communicates with the pressure generating chamber group and holds a liquid. The case member has a liquid inlet on the side opposite to the liquid discharge direction and at a position between the pressure generating chambers at both ends in the first direction. First and second liquid discharge units are arranged at positions where the first directions of the first and second liquid discharge units are parallel to each other in a second direction that is orthogonal to the first direction, and positions of the liquid inlets of the case member respectively corresponding to the first and second liquid discharge units do not overlap in the second direction.

There is provided a liquid discharging head including: a plurality of supply manifolds configured to receive a liquid to be discharged from a plurality of nozzles and provided side by side with each other; a supply integration channel arranged on a first side in a longitudinal direction of the supply manifolds; a first connecting channel connecting the supply integration channel and a first supply manifold of the supply manifolds; and a second connecting channel connecting the supply integration channel and a second supply manifold, of the supply manifolds, being adjacent to the first supply manifold in a short direction of the first supply manifold. An outlet of the first connecting channel is arranged on the first side in the longitudinal direction of the supply manifolds; and an outlet of the second connecting channel is arranged on a second side in the longitudinal direction of the supply manifolds.