| 主权项 |
1. A liquid discharge head, comprising:
a flow channel member comprising one or a plurality of discharge holes, a discharge hole surface having an opening of the discharge hole, one or a plurality of pressurizing chambers, and one or a plurality of flow channels connecting the discharge hole and the pressurizing chamber, and a pressurizing part configured to pressurize a liquid in the pressurizing chamber, wherein the flow channel comprises a nozzle part with a cross section narrowed near the discharge hole, and a partial flow channel excluding the nozzle part, and wherein the partial flow channel is formed so that a distance between Cm and C1 in a direction parallel to the discharge hole surface is larger than 0.1 W [μm] and a distance between C2 and C1 in a direction parallel to the discharge hole surface is 0.1 W [μm] or less, wherein W [μm] is a mean diameter of the partial flow channel, C1 is an area centroid of a cross section, of the partial flow channel, parallel to the discharge hole surface on a side of the partial flow channel which is close to the nozzle part, C2 is an area centroid of a cross section, of the partial flow channel, parallel to the discharge hole surface at a position located 2 W [μm] away from a side of the partial flow channel which is close to the nozzle part in a direction orthogonal to the discharge hole surface, C3 is an area centroid of a cross section, of the partial flow channel, parallel to the discharge hole surface on a side of the partial flow channel which is close to the pressurizing chamber, and Cm is an intersection of a straight line connecting C1 and C3, and a plane parallel to the discharge hole surface at a position located 2 W [μm] away from the side close to the nozzle part in a direction orthogonal to the discharge hole surface. |
