Patent ID: 8182074
Filing Date: 2012-05-22
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: an ink chamber, which stores ink therein; a nozzle orifice, adapted to eject an ink droplet therefrom; a pressure generating portion, provided in an ink channel communicating the ink chamber and the nozzle orifice, the pressure generating portion comprising a pressure chamber formed in a pressure chamber formation substrate; an elastic plate, which defines a part of the pressure chamber, a piezoelectric vibrator, comprising: an ink supply port, arranged between the ink chamber and the pressure generating portion to serve as an orifice, wherein an inertance of the nozzle orifice and an inertance of the ink supply port are greater than an inertance of the pressure generating portion, and wherein a rigidity compliance of the pressure chamber formation substrate is set to be equal to or less than a compliance of the ink.