Patent ID: 7140554
Filing Date: 2006-11-28
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a liquid chamber, which stores liquid therein; a nozzle orifice, adapted to eject a liquid droplet therefrom; a pressure generating portion, provided in a liquid channel communicating with the liquid chamber and the nozzle orifice; an elastic plate, which defines a part of the pressure generating portion, a piezoelectric vibrator, comprising: a liquid supply port, arranged between the liquid chamber and the pressure generating portion to serve as an orifice; and a pressure chamber which is a part of the pressure generating portion; wherein a value of the entire length of the nozzle orifice divided by a cross section of the nozzle orifice and a value of the entire length of the liquid supply port divided by a cross section of the liquid supply port are greater than a value of the entire length of the pressure chamber divided by a cross section of the pressure chamber.