| 摘要 |
A liquid injection head capable of jetting droplets at a high frequency, comprising a multilayer piezoelectric vibrator (18) having an upper layer piezoelectric body (24) and a lower layer piezoelectric body (25) stacked on each other, a drive electrode (23) formed in a boundary between the upper layer piezoelectric body (24) and the lower layer piezoelectric body (25) and conducted to a drive signal supply source, a common upper electrode (26) formed on the surface of the upper layer piezoelectric body (24), and a common lower electrode (27) formed on the surface of the lower layer piezoelectric body (25), wherein the inertances of a nozzle opening (10) and an ink supply port (5) are set larger than the inertances of pressure generating parts (6, 13, 16). |
