PROBLEM TO BE SOLVED: To provide a fluid ejection device in which vibration of an ejection tube inserted into a suction tube with play is restrained.SOLUTION: The fluid ejection device includes: a pulsating fluid generator 20 which converts a fluid into a pulsating fluid a fluid supply part (supply pump 10) which supplies the fluid to the pulsating fluid generator 20 the ejection tube 70 which has an ejection opening 72 communicating with the pulsating fluid generator 20 the suction tube 80 into which the ejection tube 70 is inserted with play a suction channel 81 provided between the inner circumferential surface of the suction tube 80 and the outer circumferential surface of the ejection tube 70 a suction opening 82 provided at an end of the suction channel 81 in the vicinity of the ejection opening 72 and a suction part (suction pump 11) which sucks the fluid from the suction opening 82 through the suction channel 81. The ejection opening 72 of the ejection tube 70 is held by an inner circumferential part of the suction opening 82. By this structure, vibration of the ejection tube 70 in the vicinity of the ejection opening 72 is restrained.COPYRIGHT: (C)2012,JPO&INPIT【課題】吸引管に遊挿する噴射管の振動を抑えた、流体噴射装置を提供する。【解決手段】流体噴射装置は、流体を脈流に変換する脈流発生部20と、脈流発生部20に流体を供給する流体供給部(供給ポンプ10)と、脈流発生部20に連通する噴射開口部72を有する噴射管70と、噴射管70を内部に遊挿する吸引管80と、吸引管80の内周面と噴射管70の外周面との間に形成される吸引流路81と、噴射開口部72に近接する吸引流路81の端部に形成される吸引開口部82と、吸引開口部82から、吸引流路81を介して流体を吸引する吸引手段(吸引ポンプ11)と、を備え、噴射管70の噴射開口部72が、吸引開口部82の内周部分によって挟持されている。この構成により、噴射管70の噴射開口部72の近傍の振動が抑制される。【選択図】図2
