A liquid discharge head includes a head body, a plurality of driver ICs, a flexible substrate, and a wiring board. The head body includes a discharge hole configured to discharge a liquid. The plurality of driver ICs controls drive of the head body. The plurality of driver ICs are mounted at the flexible substrate, and the flexible substrate is electrically connected to the head body. The wiring board includes a plurality of connectors. In addition, the flexible substrate includes: a plurality of protruding portions configured to protrude in the same direction and each including a tip portion to be inserted into corresponding one of the plurality of connectors; and a slit formed between the protruding portions adjacent to each other and extending up to a region between the driver ICs adjacent to each other.

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 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.

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.

A liquid discharge head includes a flow passage member and a plurality of pressurizing sections. The flow passage member includes a plurality of discharge holes, a plurality of pressurizing chambers respectively connected to a plurality of the discharge holes, a plurality of first flow passages respectively connected to a plurality of the pressurizing chambers, a second flow passage commonly connected to a plurality of the first flow passages, a plurality of third flow passages respectively connected to a plurality of the pressurizing chambers, and a fourth flow passage commonly connected to a plurality of the third flow passages. A plurality of the pressurizing sections respectively pressurizes liquid in a plurality of the pressurizing chambers. A flow passage resistance in the third flow passages is lower than a flow passage resistance in the first flow passages. In the flow passage member, a damper is formed in the fourth flow passage.

A liquid discharge head is provided, including a channel unit and a piezoelectric actuator stacked on the channel unit. The channel includes a channel including a nozzle and a pressure chamber. The piezoelectric actuator includes a piezoelectric element which includes a piezoelectric layer; a constant electric potential electrode arranged between the piezoelectric layer and the channel unit; and a driving electrode arranged on a surface of the piezoelectric layer opposite to the constant electric potential electrode. A relational expression of 0.5107α + 18.476 < β < 0.7326α + 54.409 is fulfilled assuming that α represents a length in a transverse direction orthogonal to both of one direction and a stacking direction of the pressure chamber and β represents a length in the transverse direction of the driving electrode.

A piezoelectric actuator is provided, including a vibration plate, a piezoelectric layer, a plurality of individual electrodes arranged in two arrays, first and second common electrodes which have first and second facing portions facing parts of the individual electrodes and first and second connecting portions connecting the first and second facing portions respectively, and first and second wiring portions which are arranged on the vibration plate and which are connected to the first and second common electrodes respectively via first and second connecting wirings, wherein one of the first connecting wirings connects the first connecting portion and one of the first wiring portion while striding over the second connecting portion.

A liquid discharge head to improve reliability of a dummy pressurization chamber, and a recording device including the liquid discharge head, the liquid discharge head including a channel member having discharge holes, pressurization chambers, a dummy pressurization chamber, and a substrate having pressurizing parts. The channel member includes a pressurization chamber plate, a dummy pressurization chamber plate, and stacked plates. A hole of the pressurization chamber plate has a side surface configuring a side surface of the pressurization chamber, and the hole has an opening configuring an opening of the pressurization chamber. A hole of the dummy pressurization chamber plate has a side surface configuring a side surface of the dummy pressurization chamber, and the hole has an opening configuring an opening of the dummy pressurization chamber. The substrate closes the openings of the pressurization chambers. The pressurization chamber plate closes the opening of the dummy pressurization chamber.

A liquid discharge head includes: first and second common channels extending in a first direction; and individual channels including pressure chambers and nozzles. Each of the individual channels includes: a supply portion; a descender portion extending in a second direction; and a return portion extending in a third direction. The return portion includes: a throttle portion; and a wide portion. Each of the nozzles overlaps with the wide portion. A relationship of L2>L1 is satisfied, wherein L1 is a distance in the third direction from a center of each of the nozzles to a throttle starting position, and L2 is a distance in the third direction passing through a center in a cross section of the descender portion and ranging from a center line parallel to the second direction to the center of each of the nozzles.