LIQUID EJECTION HEAD, EJECTION UNIT, AND DEVICE FOR EJECTING LIQUID

To reduce variations in ejection characteristics.SOLUTION: A liquid ejection head includes: a plurality of nozzles 111 ejecting liquids arranged in a two-dimensional matrix form; a plurality of pressure chambers 121 communicating with the plurality of nozzles 111; a plurality of common supply channel branches 152 communicating with two or more of the pressure chambers 121; a plurality of common recovery channel branches 153 communicating with two or more of the pressure chambers 121; a common supply channel main stream 156 communicating with the plurality of common supply channel branches 152; and a common recovery channel main stream 157 communicating with the plurality of common recovery channel branches 153, wherein the common supply channel branches 152 and the common recovery channel branches 153 are alternately arranged, bypass channels 191A, 191B communicating with the common supply channel branches 152 and the common recovery channel branches 153, which are communicated via a pressure chamber 121 are provided, and the plurality of bypass channels 191A, 191B communicating the common supply channel branches 152 with the common recovery channel branches 153, which are different from each other, include bypass channels 191A, 191B having different fluid resistances.SELECTED DRAWING: Figure 8 【課題】吐出特性のばらつきを低減する。【解決手段】二次元マトリクス状に配置された液体を吐出する複数のノズル１１１と、複数のノズル１１１に各々連通する複数の圧力室１２１と、２以上の圧力室１２１に通じる複数の共通供給流路支流１５２と、２以上の圧力室１２１に通じる複数の共通回収流路支流１５３と、複数の共通供給流路支流１５２に通じる共通供給流路本流１５６と、複数の共通回収流路支流１５３に通じる共通回収流路本流１５７とを有し、共通供給流路支流１５２と共通回収流路支流１５３とは交互に並べて配置され、圧力室１２１を介して通じている共通供給流路支流１５２と共通回収流路支流１５３とを通じるバイパス流路１９１Ａ、１９１Ｂを有し、異なる共通供給流路支流１５２と共通回収流路支流１５３とを通じる複数のバイパス流路１９１Ａ、１９１Ｂには、流体抵抗が異なるバイパス流路１９１Ａ、１９１Ｂが含まれている。【選択図】図８