Patent ID: 8740358
Filing Date: 2014-06-03
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a pressure generating portion, provided in an ink channel communicating a common ink chamber and a nozzle orifice; a vibration plate, which defines a part of the pressure generating portion, so that liquid in the pressure generating portion is ejected from the nozzle orifice as a liquid droplet by deforming the vibration plate; a piezoelectric vibrator, provided on a surface of the vibration plate which is opposite to a surface facing the pressure generating portion; and a liquid supply port, arranged between the common ink chamber and the pressure generating portion to serve as an orifice, wherein the piezoelectric vibrator has a multilayer structure which comprises: wherein an inertance of the nozzle orifice and an inertance of the liquid supply port are greater than an inertance of the pressure generating portion, a length of the piezoelectric vibrator is longer than a length of the pressure generating portion in a longitudinal direction of the pressure generating portion.