Patent ID: 7654649

Claim:
A liquid delivering device comprising: a flow passage unit having a plurality of pressure chambers each of which communicating with a liquid ejection port; a piezoelectric actuator for selectively changing the volume of the plurality of pressure chambers, the piezoelectric actuator including a plurality of individual electrodes corresponding to the plurality of pressure chambers, a common electrode opposing the plurality of individual electrodes, a piezoelectric layer sandwiched between the plurality of individual electrodes and the common electrode, and a rigidity reduction structure configured to reduce the rigidity of the piezoelectric actuator and which is provided within an area where at least the pressure chamber is formed and in a vicinity of the individual electrode, in perspective plan view, wherein the piezoelectric layer is disposed to cover, in perspective plan view, at least each region that corresponds to an entire portion of each of the pressure chambers, wherein the rigidity reduction structure reduces the rigidity of a partial area, in perspective plan view, of the piezoelectric actuator corresponding to each of the pressure chambers, wherein the rigidity reduction structure is provided inside of the piezoelectric actuator and is not exposed outside, and wherein the rigidity reduction structure does not overlap the individual electrode, or only a part of the rigidity reduction structure overlaps the individual electrode, in perspective plan view.