PROBLEM TO BE SOLVED: To reduce the amount of air flowing-in from an injection port provided on the tip of an injection pipe.SOLUTION: A liquid injection device includes a liquid chamber, a first supply passage for supplying liquid therethrough into the liquid chamber, a pressure changing part for changing a pressure in the liquid chamber, an injection pipe 205 communicating with the liquid chamber, for injecting liquid from an injection port on the tip, and a second supply passage having a confluent site with the injection pipe 205 by connecting the end on the downstream side to the injection pipe 205 between the liquid chamber and the injection port, for supplying liquid into the injection pipe 205 through the confluent site.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】噴射管の先端に設けられた噴射口から流入する空気の量を低減すること。【解決手段】液体室と、前記液体室に液体を供給する第1供給流路と、前記液体室の圧力を変更する圧力変更部と、前記液体室に連通し、先端の噴射口から液体を噴射する噴射管205と、下流側の端が前記液体室と前記噴射口との間において前記噴射管205に接続されることで前記噴射管205との合流部位を有し、前記合流部位を通じて前記噴射管205内に液体を供給する第2供給流路と、を備える液体噴射装置。【選択図】図1
