A liquid discharge device including a first piezoelectric element that has a first electrode and a second electrode and discharges a liquid from a first nozzle by being driven, a second piezoelectric element that has a third electrode and a fourth electrode and discharges a liquid from a second nozzle by being driven, a reference voltage signal propagation path that electrically couples the second electrode and the fourth electrode and propagates the reference voltage signal supplied to a first coupling point to the second electrode and the fourth electrode, and a first capacitor electrically coupled to the reference voltage signal propagation path at a second coupling point provided in the reference voltage signal propagation path, in which the second coupling point is located between the first coupling point and the second electrode in the reference voltage signal propagation path.

A liquid discharging apparatus may include a first head unit and a second head unit. The first head unit includes first and second parts. A position of the second part in a first direction is different from that of the first part, and a width is shorter than a width of the first part in a second direction. The second head unit includes a fourth part and a fifth part. A position of the fifth part in the first direction is different from that of the fourth part, and a width is shorter than a width of the fourth part in the second direction. The first head unit and the second head unit are disposed side by side in the second direction. At least a part of the second part and at least a part of the fifth part do not overlap with each other in the first direction.

A liquid ejecting head includes head chips configured to eject a liquid toward a medium in a first-direction, in which, when a width direction of the medium is a second-direction, a direction orthogonal to the first-direction and the second-direction is a third-direction, and a direction perpendicular to the first-direction and intersecting the second-direction and the third-direction is a fourth-direction, the head chips include a first-chip group in which first head-chips are arranged side by side in the second-direction, the first-head chip having a first-nozzle row formed by arranging first-nozzles side by side in the fourth-direction, and a second-chip group in which second-head chips are arranged side by side in the second-direction, the second-head chip having a second-nozzle row formed by arranging second-nozzles side by side in the fourth-direction, and the first-chip group is arranged side by side in the third-direction with respect to the second-chip group.

Provided is a liquid ejection device capable of improving the sealing property of a gap between a main housing and a liquid ejection head while maintaining a position adjustment allowance of the liquid ejection head with respect to the main housing. A main housing has one or more ejection unit protrusion opening into which the liquid ejection unit is inserted downward and protrudes through a gap in a horizontal direction, and covers and internally houses a portion of the liquid ejection head other than the liquid ejection unit. The size of the ejection unit insertion opening is smaller than the size of the ejection unit protrusion opening. The sealing member comes in contact with the outer peripheral portion of the liquid ejection unit in a state where the edge portion of the ejection unit insertion opening is bent.

A liquid jetting apparatus jetting a liquid onto a recording medium conveyed in a first direction includes head units arranged in a second direction orthogonal to the first direction. One head unit includes nozzle chips; one nozzle chip has a nozzle arrangement area wherein nozzles are aligned in a third direction crossing the first and second directions. The nozzle chip is arranged to be shifted relative to another nozzle chip in a direction crossing the first and second directions and different from the third direction. The head unit has a first overlapping portion wherein nozzle arrangement areas of first and second nozzle chips included in the nozzle chips partially overlap with each other in the first direction. The liquid jetting apparatus has a second overlapping portion wherein nozzle arrangement areas of third and fourth nozzle chips included in the head units partially overlap with each other in the first direction.

A liquid discharge device including a first drive circuit, a second drive circuit, a third drive circuit, a fourth drive circuit, a connector coupled to a discharge head, and a substrate that includes a first wiring which couples the connector and the first drive circuit outputting a first drive signal, a second wiring which couples the connector and the second drive circuit outputting a second drive signal, a third wiring which couples the connector and the third drive circuit outputting a third drive signal, and a fourth wiring which couples the connector and the fourth drive circuit outputting a fourth drive signal, in which the first wiring is shorter than the second wiring, the third wiring, and the fourth wiring, and the fourth wiring is longer than the first wiring, the second wiring, and the third wiring.

A printing apparatus and a method of providing printing apparatus are provided. A printing apparatus according to at least one embodiment of the present disclosure includes a base panel or head base, at least one or more head packs installed on the head base, a head pack holder installed on each of the head packs and configured to handle and fix the head pack, and a fastening structure configured to mount the head pack holder to the head packs.

A liquid ejecting apparatus includes a first head having a first channel pipe, a channel member having a second channel pipe, and a first tube that communicates the first channel pipe with the second channel pipe and that has flexibility. The first tube has a first end portion and a second end portion that is opposite to the first end portion. The first tube is coupled to the first channel pipe in such a manner that the first end portion covers an outer periphery of the first channel pipe. The first tube is also coupled to the second channel pipe in such a manner that the second end portion covers an outer periphery of the second channel pipe. A fixation strength between the first tube and the first channel pipe is greater than a fixation strength between the first tube and the second channel pipe.

An aspect of the present invention is a liquid ejection apparatus including: a liquid ejection head including a heating element, a first protection layer, a second protection layer that functions as a first electrode, a second electrode that is electrically connected to the first electrode, and an ejection port; and a control unit configured to perform control of setting a potential difference between potentials of the first and second electrodes to a predetermined value by changing at least one of the potentials of the first electrode and the second electrode, in which the control unit sets the potential difference to a first value in a case where printing is performed, and the control unit sets the potential difference to a second value different from the first value and feeds power to at least one of a plurality of the heating elements in a case where printing is not performed.

A head includes: a silicon substrate; an insulating film on the silicon substrate; an electrode wiring on the insulating film; a flexible wiring connected to the electrode wiring; and a conductive film electrically connects the flexible wiring and the electrode wiring in a bonding area. The silicon substrate has an exposed area on a surface of the silicon substrate facing the insulating film, and the exposed area is in a vicinity of the bonding area and is exposed from the insulating film.