Patent ID: 9358802
Filing Date: 2016-06-07
CPC Classification: B41J

Claim Text:
1. A flow passage member used in a liquid ejecting head including an ejecting unit that ejects a liquid via a nozzle opening through driving of a driving element, wherein the ejecting unit communicates with a negative pressure generation mechanism configured to maintain a negative pressure of the ejecting unit, wherein the flow passage member comprises: a flow passage internal pressure adjustment mechanism configured to adjust a pressure inside a flow passage between the negative pressure generation mechanism and the ejecting unit by changing a volume of the flow passage therebetween; and a valve configured to open and close a flow passage between the negative pressure generation mechanism and the flow passage internal pressure adjustment mechanism, wherein the flow passage internal pressure adjustment mechanism includes a first concave portion that communicates with the valve and the ejecting unit and stores a liquid, a second concave portion that communicates with a first fluid supply source, stores a fluid, and faces the first concave portion, and a first flexible member that is interposed between the first and second concave portions and seals the first and second concave portions, and wherein when the flow passage is closed by the valve, the first flexible member is deformed by the fluid supplied from the first fluid supply source and a volume of a portion partitioned by the first concave portion and the first flexible member is changed to adjust the pressure inside the flow passage, wherein the liquid ejecting head includes a second fluid supply source configured to supply a fluid for driving the valve, and wherein the valve is configured to open and close the flow passage by the fluid supplied from the second fluid supply source.