LIQUID DISCHARGE HEAD AND MANUFACTURING METHOD OF LIQUID DISCHARGE HEAD

PROBLEM TO BE SOLVED: To provide a liquid discharge head capable of securing rigidity even if a thickness of a discharge port plate is thinned.SOLUTION: A liquid discharge head includes: a diaphragm 11; and a pressure chamber 16 surrounded by a discharge port plate 13. The liquid discharge head discharges liquid in the pressure chamber from a discharge port 14 of the discharge port plate using deflection of the diaphragm caused by a piezoelectric body formed on the diaphragm. Both of an internal angle θin a contact section between an inner wall 17 in a short-side direction of the pressure chamber and the diaphragm and an internal angle θin a contact section between the inner wall 17 and the discharge port plate are obtuse angles. A width Win the short-side direction of the pressure chamber on the diaphragm side and a width Win the short-side direction of the pressure chamber on the discharge port plate side satisfy W>W.SELECTED DRAWING: Figure 1 【課題】吐出口プレートの厚さを薄くしても剛性を確保できる液体吐出ヘッドを提供する。【解決手段】振動板１１と、吐出口プレート１３に囲まれた圧力室１６を有し、前記振動板上に形成された圧電体による振動板の撓みを利用して圧力室内の液体を吐出口プレートの吐出口１４から吐出する液体吐出ヘッドであって、圧力室の短手方向の内壁１７と振動板との接触部での内角θｄ、内壁１７と吐出口プレートとの接触部での内角θｎがいずれも鈍角であり、振動板側の圧力室の短手方向の幅をＷｄ、吐出口プレート側の圧力室の短手方向の幅をＷｓとが、Ｗｄ＞Ｗｓを満たす。【選択図】図１