LIQUID DISCHARGE HEAD, LIQUID DISCHARGE UNIT, AND DEVICE FOR DISCHARGING LIQUID

To solve the problem of a complicated structure caused by a necessity of providing a circulation port for each circulation flow path when the circulation flow path is arranged for each of two nozzle rows.SOLUTION: A liquid discharge head has: two nozzle rows 4A and 4B having a plurality of nozzles 4 for discharging liquid arrayed; a plurality of individual liquid chambers 6 communicating with respective nozzles 4 of the nozzle rows 4A and 4B; and two circulation flow paths 41A and 41B corresponding to the nozzle rows 4A and 4B, and communicating with the plurality of individual liquid chambers 6. The two circulation flow paths 41A and 41B communicate with each other through bridging flow paths 44 arranged in a direction crossing a nozzle arraying direction. The bridging flow paths 44 and the circulation flow paths 41A and 41B are arranged at different positions in a thickness direction of flow path plates 2 that form the bridging flow paths 44 and the circulation flow paths 41A and 41B. The circulation flow paths 41 are formed on a second flow path plate 52, and the bridging flow paths 44 are formed on a third flow path plate. The second flow path plate 52 is overlapped with a third flow path plate 53, thereby the circulation flow paths 41 are connected with the bridging flow paths 44.SELECTED DRAWING: Figure 7 【課題】２つのノズル列毎に循環流路を配置すると、循環流路毎に循環ポートを設ける必要が生じ、構成が複雑になる。【解決手段】液体を吐出する複数のノズル４が配列された２つのノズル列４Ａ、４Ｂと、ノズル列４Ａ，４Ｂの各ノズル４に通じる複数の個別液室６と、ノズル列４Ａ、４Ｂに対応し、複数の個別液室６に通じる２つの循環流路４１Ａ，４１Ｂとを有し、２つの循環流路４１Ａ、４１Ｂはノズル配列方向と交差する方向に配置された架橋流路４４を介して相互に通じ、架橋流路４４と循環流路４１Ａ、４１Ｂとは、架橋流路４４と循環流路４１Ａ、４１Ｂを形成する流路板２の厚み方向において、異なる位置に配置されており、循環流路４１は、第２流路板５２に形成され、架橋流路４４は、第３流路板に形成され、第２流路板５２と第３流路板５３が重なることで、循環流路４１と架橋流路４４が接続されている。【選択図】図７