Patent ID: 8282194
Filing Date: 2012-10-09
Classification: B41J

Abstract:
1. A liquid ejecting head comprising: multiple nozzles from which a liquid is ejected; pressurizing chambers communicating with respective nozzles; and liquid supply channels that supply the liquid from a common liquid chamber to the respective pressurizing chambers, the liquid ejecting head ejecting the liquid held in the pressurizing chambers from nozzle openings in the tips of the nozzles when a change in the pressure within the pressurizing chambers is instigated by driving a pressure generation unit, wherein the inertance of the nozzles is set to be less than the inertance of the liquid supply channels; a cylindrical nozzle straight portion, in which the opening cross-sectional area is set to be narrower than the other areas of the nozzle, is formed toward the pressurizing chamber from the nozzle opening in each nozzle; the opening cross-sectional area of the nozzle straight portion is a straight surface area Sn; the length of the nozzle straight portion is a straight length Ln; the channel cross-sectional area of the liquid supply channel is a supply channel surface area Ss; the length from a common liquid chamber-side connection opening in the liquid supply channel to a pressurizing chamber-side connection opening is a supply channel length Ls; and the ratio of the straight length Ln to the straight surface area Sn (Ln/Sn) is set so as to be less than or equal to ½ of the ratio of the supply channel length Ls to the supply channel surface area Ss (Ls/Ss).