Patent ID: 7614727
Filing Date: 2009-11-10
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a plurality of ejection ports which eject liquid; a plurality of pressure chambers which communicate respectively with the plurality of ejection ports, each pressure chamber including a bottom surface that is opposed by an overlying ceiling surface with the bottom surface of each pressure chamber including one of the plurality of ejection ports; the overlying ceiling surface of each pressure chamber being a part of a common diaphragm facing the bottom surface on which the ejection ports are formed; a plurality of piezoelectric elements respectively provided on each part of the common diaphragm facing the bottom surface on which the ejection ports are formed so that a piezoelectric element is positioned over each pressure chamber facing the bottom surface on which the ejection ports are formed, each piezoelectric element deforming an associated part of the common diaphragm to deform each associated pressure chamber to eject liquid from the associated ejection port on the associated bottom surface; a common liquid chamber which supplies the liquid to the plurality of pressure chambers that is formed adjacent to each respective one of the piezoelectric elements above the pressure chambers; and a plurality of electric wires which stand upright from and substantially perpendicular to a surface of each part of the common diaphragm on which the piezoelectric elements are mounted, the electric wires passing through a partition wall of the common liquid chamber and being electrically connected to the piezoelectric elements, the electric wires being formed by inserting wiring material for forming the electric wires into holes provided in the partition wall of the common liquid chamber.