A head chip, a liquid jet head, and a liquid jet recording device each capable of inhibiting mechanical crosstalk, and exerting a desired jet performance are provided. The head chip according to an aspect of the present disclosure includes a flow channel member having a plurality of pressure chambers containing liquid, an actuator plate which is stacked on the flow channel member in a state of being opposed in a first direction to the pressure chambers, and a drive electrode which is formed on a surface of the actuator plate, the surface facing to the first direction, and which is configured to deform the actuator plate in the first direction to change a volume of at least one of the pressure chambers. A dividing groove which is configured to zone the actuator plate between the pressure chambers adjacent to each other is formed in a portion of the actuator plate, the portion being located between the pressure chambers adjacent to each other when viewed from the first direction.

A head chip, a liquid jet head, and a liquid jet recording device each capable of increasing pressure generated while achieving power saving are provided. The head chip according to an aspect of the present disclosure includes a flow channel member having a pressure chamber containing liquid, an actuator plate which is stacked on the flow channel member in a state of being opposed to the pressure chamber in a first direction, a drive electrode which is formed on a surface facing to the first direction in the actuator plate, and which is configured to deform the actuator plate in the first direction to change a volume of the pressure chamber, and a non-drive member which is stacked at an opposite side to the flow channel member across the actuator plate in the first direction, and which is configured to limit a displacement of the actuator plate toward an opposite side to the flow channel member in the first direction.

There are provided a liquid jet head and a liquid jet recording device each capable of obtaining a stable ejection performance. An inkjet head includes a head chip provided with a plurality of ejection channels sequentially arranged from a +X direction toward a -X direction in an X direction, and configured to jet ink located inside the ejection channels, a flow channel member which is provided with a guide flow channel for guiding the ink from the +X direction toward the -X direction in the X direction, and in which the guide flow channel is coupled to each of the ejection channels, and a board unit on which a plurality of drive ICs arranged along the X direction is mounted, and which is thermally coupled to the flow channel member, wherein the flow channel member is provided with a cooling flow channel which guides the ink from the -X direction toward the +X direction in the X direction so as to cool the plurality of drive ICs.

A piezoelectric actuator array includes a substrate plate with a number of signal leads and at least one common lead, and a number of piezoelectric bodies arranged in a row on one surface of the substrate plate and formed by dividing a common piezoelectric block. The piezoelectric bodies include a number of active bodies each of which has, on a first side of the row, a signal electrode in contact with one of the signal leads and, on an opposite second side of the row, a common electrode in contact with the common lead. The substrate plate has at least one connector lead disposed on the first side of the row and electrically connected to the common lead on the second side of the row. At least one piezoelectric body has a conductive outer surface layer that establishes an electrically conductive path from the connector lead to the common lead.

There is provided a liquid discharge head including: a plurality of first individual channels; a first supply manifold; a first return manifold; a plurality of second individual channels; a second supply manifold; a second return manifold; and a first bypass channel communicating the first supply manifold and the second return manifold. The first bypass channel includes: a first supply connecting channel, a first return connecting channel, and a first connecting channel. Channel resistance in one of the first supply connecting channel and the first return connecting channel is greater than channel resistance in the first connecting channel.

A liquid ejection head includes a plate including a nozzle for ejecting a liquid, a substrate, an actuator including a pressure chamber. The actuator includes an upper surface and a side surface connecting the upper surface to the substrate. The side surface is at an angle θ between 45 and 90 degrees. The head includes an electrode connected to the chamber. The electrode includes a first wiring on the side surface and a second wiring on the substrate within a first region thereof. The first region has a length A from a position of a line along which the upper and side surfaces meet, and the value of length A is B/tan θ′, where B is a distance between the upper surface and the substrate and θ′ is (θ−45)×2.

A liquid jet head includes: a nozzle plate including a nozzle array, the nozzle array including a plurality of nozzle holes each extending in a Z direction, the nozzle holes being arranged side by side in an X direction; a head chip disposed in a +Z direction with respect to the nozzle plate and including ejection channels communicating with the respective nozzle holes; a manifold disposed in a +Y direction with respect to the head chip, the manifold being configured to support the head chip by a face facing a −Y direction and including an ink flow path communicating with the ejection channels; and a drive board supported on the face facing the −Y direction of the manifold and electrically connected to the head chip.

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.

There is provide a liquid discharge head including: a supply manifold; a feedback manifold; and a plurality of individual flow channels having: a supply portion, a descender portion, and a feedback portion. The supply manifold has a plurality of supply ports, and the feedback manifold has a plurality of feedback ports. At least part of the supply manifold overlaps with the feedback manifold in the second direction. The plurality of pressure chambers have first pressure chambers forming a first pressure chamber array and second pressure chambers forming a second pressure chamber array. The first pressure chamber array is arranged at one side, of the supply manifold, in a third direction and the second pressure chamber array is arranged at the other side, of the supply manifold, in the third direction. The first pressure chamber array and the second pressure chamber array are connected to the supply manifold.

There are provided a liquid jet head and so on capable of ensuring the ejection stability of the liquid even when jetting the liquid high in viscosity irrespective of the structure of the liquid jet head. The liquid jet head according to an embodiment of the present disclosure includes a plurality of nozzles, an actuator having a plurality of pressure chambers, and a drive section for applying a drive signal to the actuator. The plurality of pulses in the drive signal include at least one first pulse configured to expand the volume of the pressure chamber, and at least one second pulse configured to contract the volume of the pressure chamber, and the pressure in the pressure chamber changes with time including a plurality of extremal values in one cycle. First timing as expansion start timing of the volume of the pressure chamber by the first pulse and second timing as contraction start timing of the volume of the pressure chamber by the second pulse are adjacent to each other, and both of the first timing and the second timing are located in a period between two consecutive extremal values of the plurality of extremal values.