Patent attributes
A recording head includes: an ink reservoir; ejection nozzles; and at least one ink supply path through which ink, reserved in the ink reservoir, is supplied to the ejection nozzles. The ink supply path includes: a pressure chamber having a piezoelectric element for changing pressure inside of the ink supply path for ejecting ink in the ink supply path from the ejection nozzles; a restriction part disposed between the ink reservoir and the pressure chamber for inhibiting ink in the pressure chamber from reversely flowing toward the ink reservoir; and a coupling portion connecting the pressure chamber and the restriction part. The restriction part, the coupling portion, and the pressure chamber are designed such that size the ink supply path becomes larger in order of the restriction part, the coupling portion, and the pressure chamber.
