| 摘要 |
<P>PROBLEM TO BE SOLVED: To remove bubbles included in fluid from a fluid chamber. <P>SOLUTION: The fluid injection device includes: a fluid injection part having; a fluid chamber body 50, in which a fixed face 52, a diaphragm 57 facing the fixed face 52, the fluid chamber 51 having a space surrounded by a sidewall 59 continuing the fixed face 52 and the diaphragm 57, and an inlet channel tube 55 and an outlet channel tube 53 communicating with the fluid chamber 51 are integrally molded; a piezoelectric element 40, in close contact with the diaphragm 57; and a lid body comprising an upper case 20 and a lower case 30 holding the fluid chamber body 50, wherein inner surfaces of respective connecting parts of the fixed face 52, the sidewall 59, the diaphragm 57 are rounded smoothly in molding, and the volume of the fluid chamber 51 is reduced rapidly by the diaphragm 57, and fluid is injected in a pulse form from a nozzle opening 81 provided in an end direction of the outlet channel tube 53. <P>COPYRIGHT: (C)2010,JPO&INPIT |
