HEAD ARRAY, HEAD MODULE, DISCHARGE UNIT, DEVICE FOR DISCHARGING LIQUID

To reduce the impact position shift at the joint of heads.SOLUTION: A head array comprises two heads 1A, 1B arranged in a longitudinal direction while being offset in a direction orthogonal to the longitudinal direction. The head 1 comprises a plurality of pressure chambers 21 communicating with a plurality of nozzles 11, a plurality of common supply flow path branches 52 communicating with the plurality of pressure chambers 21, a common supply flow path main stream 56 communicating with the plurality of common supply flow path branches 51, a plurality of common recovery flow path branches 53 communicating with the plurality of pressure chambers 21, and a common recovery flow path main stream 57 communicating with the plurality of common recovery flow path branches 53. A supply port 81 for supplying a liquid from the outside is arranged at one end of the common supply flow path main stream 56. A recovery port 82 for recovering the liquid to the outside is arranged at one end of the common recovery flow path main stream 57. In the longitudinal direction, the supply port 81 and the recovery port 82 are located on the same side. In the two heads 1A, 1B, the liquid flows in the common supply flow path branch 52 and the common recovery flow path branch 53 are opposite directions to one another.SELECTED DRAWING: Figure 4 【課題】ヘッドのつなぎ目における着弾位置ずれを低減する。【解決手段】長手方向と直交する方向に位置をずらして、長手方向に並べられた２つのヘッド１Ａ、１Ｂを備え、ヘッド１は、複数のノズル１１に各々連通する複数の圧力室２１と、複数の圧力室２１に連通する複数の共通供給流路支流５２と、複数の共通供給流路支流５１に連通する共通供給流路本流５６と、複数の圧力室２１に連通する複数の共通回収流路支流５３と、複数の共通回収流路支流５３に連通する共通回収流路本流５７とを備え、共通供給流路本流５６の一端部に外部から液体を供給する供給ポート８１が配置され、共通回収流路本流５７の一端部に外部に液体を回収する回収ポート８２が配置され、長手方向において、供給ポート８１及び回収ポート８２が同じ側に位置し、２つのヘッド１Ａ、１Ｂは、共通供給流路支流５２及び共通回収流路支流５３における液体の流れが逆方向である。【選択図】図４