Liquid ejection head formed of piezoelectric plates

摘要

A liquid ejection head includes a piezoelectric block body having a plurality of pressure chambers arranged two-dimensionally to face respective ejection ports, a plurality of air chambers arranged adjacently relative to the plurality of pressure chambers, and a plurality of flow channels arranged along the pressure chambers. The pressure chambers are deformed by expansion and contraction of piezoelectric members disposed between the pressure chambers and the air chambers so as to drive the liquid stored therein to flow toward the ejection ports. A connection flow channel is provided at the ejection port side of the piezoelectric block body so as to make each of the pressure chambers communicate with at least one of the flow channels for partial recirculation of the ink.

主权项

1. A liquid ejection head comprising:
a piezoelectric block body that has a plurality of pressure chambers storing liquid and arranged two-dimensionally to face respective ejection ports for ejecting liquid, a plurality of air chambers arranged adjacently relative to the plurality of pressure chambers, and a plurality of flow channels arranged along the pressure chambers so as to supply liquid, the pressure chambers, the air chambers and the flow channels being formed therein with piezoelectric members disposed between the plurality of pressure chambers and the plurality of air chambers so as to drive the liquid stored in the pressure chambers to flow toward the ejection ports by causing the inner walls of the pressure chambers to be deformed by expansion and contraction; and a connection flow channel that makes at least one of the pressure chambers communicate with at least one of the flow channels at the side of the related ejection port, wherein the piezoelectric block body is formed by laying a first piezoelectric plate having the pressure chambers and the flow channels on a second piezoelectric plate having the air chambers.