| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid ejection head, a liquid ejection head unit and a liquid ejection device capable of stably supplying liquid by suppressing choking of a filter caused by bubbles, and capable of suppressing deterioration of liquid supply performance and liquid delivery characteristics by suppressing remaining of the bubbles in a flow passage.SOLUTION: The liquid ejection head includes a head body having a nozzle opening for ejecting the liquid, and a supply member 3 for supplying the liquid from a liquid supply source to the head body, wherein the supply member 3 includes a filter chamber 35 having a filter 32 therein, and a supply passage 38 having a supply port 37 opened to a ceiling 36 side opposed to the filter 32 of the filter chamber 35 and supplying the liquid to the filter chamber 35, and a bubble stagnating part 42 provided on the ceiling 36 side of the filter chamber 35 and stagnating the bubbles. The supply port 37 is provided on the vertical direction upper side with respect to the filter 32, and a ratio of a minimum width of the ceiling 36 to an inside diameter of the supply port 37 opened on the ceiling 36 side of the supply passage 38 is 6.25 or more. |
