Liquid injection head and liquid injection recording device

Abstract

To provide a liquid injection head or the like that can improve the stability of liquid discharge. [Solution] A liquid spray head according to one embodiment of the present disclosure includes a spray unit having a plurality of nozzles, a plurality of pressure chambers, and a common liquid flow path extending along the arrangement direction of the plurality of pressure chambers and communicating with each of the plurality of pressure chambers, and a drive unit that drives the spray unit based on a drive signal having one or more pulses within a predetermined printing cycle, thereby spraying the liquid filled in the pressure chambers from the nozzles. The drive unit performs non-discharge driving for non-discharge nozzles by including only non-discharge pulses in the drive signal, which have a pulse width in a range in which liquid is not discharged from the non-discharge nozzles and are pulses that cause minute vibrations of the meniscus in the pressure chamber communicating with the non-discharge nozzles, at discharge timings that include both discharge nozzles from which liquid is discharged and non-discharge nozzles from which liquid is not discharged in the plurality of nozzles.

Claims

1. An injection unit having a plurality of nozzles for spraying liquid, a plurality of pressure chambers that communicate individually with the plurality of nozzles and are each filled with the liquid, and a common flow path for the liquid that extends along the direction in which the plurality of pressure chambers are arranged and communicates with each of the plurality of pressure chambers, A drive unit drives the spray unit based on a drive signal having one or more pulses within a predetermined printing cycle, thereby causing the liquid filled in the pressure chamber to be ejected from the nozzle. Equipped with, The aforementioned drive unit is In the plurality of nozzles, at a discharge timing that includes both a discharge nozzle from which the liquid is discharged and a non-discharge nozzle from which the liquid is not discharged, Non-discharge drive is performed on the non-discharge nozzle by including only non-discharge pulses in the drive signal, which have a pulse width within a range where the liquid is not discharged from the non-discharge nozzle and cause minute vibrations in the meniscus in the pressure chamber communicating with the non-discharge nozzle. Liquid spray head.

2. The aforementioned drive unit is At the discharge timing when the number of discharge nozzles is greater than the number of non-discharge nozzles, Performing the non-discharge drive on the non-discharge nozzle The liquid spray head according to claim 1.

3. The aforementioned drive unit is At the time of discharge, at least the nozzles adjacent to the non-discharge nozzles along the arrangement direction of the multiple pressure chambers become discharge nozzles. Performing the non-discharge drive on the non-discharge nozzle The liquid spray head according to claim 1.

4. The aforementioned drive unit is In the pressure chamber communicating with the discharge nozzle and the pressure chamber communicating with the non-discharge nozzle, the phases of the pressure waves are such that they do not coincide. Performing the non-discharge drive on the non-discharge nozzle A liquid spray head according to any one of claims 1 to 3.

5. The drive unit performs the non-ejection drive to the non-ejection nozzle such that a plurality of non-ejection pulses are included within the printing cycle. A liquid spray head according to any one of claims 1 to 3.

6. The aforementioned injection unit is A liquid supply channel for supplying the liquid into the pressure chamber, A liquid recovery channel for recovering the liquid from the pressure chamber, It further possesses A liquid spray head according to any one of claims 1 to 3.

7. The pressure loss on the liquid recovery channel side is greater than the pressure loss on the liquid supply channel side. The liquid spray head according to claim 6.

8. The liquid spray head is provided according to any one of claims 1 to 3. Liquid injection recording device.

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