LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS

摘要

A liquid ejection head includes: a nozzle including a nozzle opening and a nozzle communication channel communicating at one end thereof with the nozzle opening; a liquid chamber communicating with another end of the nozzle communication channel; a pressurizing element configured to pressurize liquid in the liquid chamber; circulation outlets formed at the nozzle; individual circulation channels communicating with the nozzle; and a common circulation channel at which communication ports respectively communicating with the individual circulation channels are formed, the circulation outlets arranged symmetrically with respect to a nozzle axis passing through a barycenter of the nozzle opening and perpendicular to a nozzle opening surface, and the individual circulation channels respectively communicating with the circulation outlets and a same common circulation channel, flow rates of liquid respectively passing through the circulation outlets when the liquid in the nozzle is circulated to the common circulation channel being equal to each other.

主权项

1. A liquid ejection head, comprising:
a nozzle including a nozzle opening through which liquid is ejected, and a nozzle communication channel communicating at one end thereof with the nozzle opening; a liquid chamber which communicates with another end of the nozzle communication channel; a pressurizing element which is provided on the liquid chamber, the pressurizing element configured to pressurize liquid in the liquid chamber; a plurality of circulation outlets which are formed at the nozzle; a plurality of individual circulation channels which communicate with the nozzle via each of the plurality of circulation outlets; and a common circulation channel at which a plurality of communication ports respectively communicating with the plurality of individual circulation channels are formed, wherein the nozzle has a structure where the plurality of circulation outlets are arranged symmetrically with respect to a nozzle axis which passes through a barycenter of the nozzle opening and is perpendicular to a nozzle opening surface, and the plurality of individual circulation channels respectively communicating with the plurality of circulation outlets further communicate with a same common circulation channel, and the circulation outlets have a structure where flow rates of liquid respectively passing through the circulation outlets when the liquid in the nozzle is circulated to the common circulation channel are equal to each other.