JP2019147303A5 - - Google Patents

Claims (10)

A pressure chamber to which a liquid is supplied, a communication passage for communicating the pressure chamber with a nozzle, and a flow path forming portion provided with a circulating liquid chamber.
A pressure generating part that generates a pressure change in the pressure chamber,
And communicating the pressure chamber into the circulating liquid chamber, a first circulating passage for discharging the liquid from the pressure chamber,
Wherein the communication passage is communicated with the circulating liquid chamber, and a second circulation passage for discharging liquid from said communication path,
The pressure chamber extends in a second direction along a plane orthogonal to the first direction.
The first circulation path is a liquid discharge head extending from the pressure chamber in a plan view and extending in a direction intersecting the first direction. The liquid discharge head according to claim 1, wherein the first circulation path is formed in the flow path forming portion. The first circulation path is connected to the side surface of the pressure chamber, and is connected to the side surface of the pressure chamber.
Claim 1 or claim that an inclined surface is formed on the side surface of the pressure chamber to which the first circulation path is connected so as to increase the height of the pressure chamber toward the inside of the pressure chamber. 2. The liquid discharge head according to 2. The liquid discharge head according to any one of claims 1 to 3, wherein the first circulation path overlaps the second circulation path in a plan view. The liquid discharge head according to any one of claims 1 to 4, wherein the flow path resistance of the nozzle is smaller than the flow path resistance of the first circulation path and smaller than the flow path resistance of the second circulation path. The liquid discharge head according to claim 5, wherein the flow path cross-sectional area of the nozzle is larger than the flow path cross-sectional area of the first circulation path and larger than the flow path cross-sectional area of the second circulation path. The liquid discharge head according to claim 5 or 6, wherein the flow path resistance of the first circulation path is smaller than the flow path resistance of the second circulation path. The liquid discharge head according to any one of claims 5 to 7, wherein the flow path cross-sectional area of the first circulation path is larger than the flow path cross-sectional area of the second circulation path. The circulating fluid chamber includes a first circulating fluid chamber and a second circulating fluid chamber.
The first circulation path communicates the pressure chamber with the first circulation liquid chamber, and connects the pressure chamber to the first circulation liquid chamber.
The liquid discharge head according to any one of claims 1 to 8, wherein the second circulation path communicates the communication passage with the second circulation liquid chamber. A liquid discharge device including the liquid discharge head according to any one of claims 1 to 9.