Liquid-ejecting head and liquid-ejecting apparatus

摘要

A liquid-ejecting head includes a channel which is in communication with a nozzle opening and which includes a pressure-generating chamber, a circulation channel that serves to circulate a liquid in the channel, and a pressure generator that serves to generate pressure change. The circulation channel has a narrow portion including a first wall and a second wall, the first wall tilting with respect to a forward direction of a liquid flows and serving to gradually decrease the cross-sectional area, the second wall tilting with respect to the flow direction and serving to gradually increase the cross-sectional area. The tilt angle of the first wall with respect to the inner surface of the circulation channel is larger than the tilt angle of the second wall with respect to the inner surface of the circulation channel at the downstream side.

主权项

1. A liquid-ejecting head comprising:
pressure-generating chambers, each of which is in communication with a nozzle opening that serves for liquid ejection; ink-supplying channels, each of which is in communication with one of the pressure-generating chambers; circulation communication channels, each of which is in communication with one of the pressure-generating chambers; a common liquid chamber which is in communication with the ink-supplying channels; a circulation channel which is in communication with the circulation communication channels; pressure generators, each of which serves to generate pressure change in a liquid in the pressure-generating chamber, wherein the circulation channel which serves to circulate the liquid supplied from the common liquid chamber through the circulation communication channels, channel resistance of the liquid flowing in the circulation communication channel from the common liquid chamber to the circulation channel is smaller than that from the circulation channel to the common liquid chamber.