Liquid dispensing head, liquid dispensing unit, and device for dispensing liquid

Abstract

It delivers high-quality liquid discharge in situations where no circulating airflow occurs, while suppressing significant image quality degradation in situations where circulating airflow occurs. [Solution] A liquid discharge head 100 is provided with a plurality of nozzle rows 104-1 to 104-4, wherein nozzles 104-1R and 104-1L are located in the end regions of the upstream nozzle row 104-1, which is located on the upstream side in the direction of transport of the discharged medium, and nozzles 104-4R and 104-4L are located in the end regions of the downstream nozzle row 104-4, which is located on the downstream side in the direction of transport of the discharged medium, and these are configured to correspond to adjacent dots dL1, dL4, dR1, and dR4 on the discharged medium, and in either end region of the end regions, the dots dL1 and dR1 corresponding to the nozzles of the upstream nozzle row are configured to be adjacent dots relative to the dots dL4 and dR4 corresponding to the nozzles of the downstream nozzle row, starting from the central region in the direction of the nozzle row.

Claims

1. A liquid dispensing head having multiple nozzle rows extending in a nozzle row direction perpendicular to the direction of transport of the dispensing medium, The nozzles positioned within the end regions of the upstream nozzle row, located on the upstream side in the direction of transport of the discharged medium, and the nozzles positioned within the end regions of the downstream nozzle row, located on the downstream side in the direction of transport of the discharged medium, are configured to correspond to adjacent dots on the discharged medium. A liquid dispensing head characterized in that, in either of the end regions of the aforementioned end regions, the dots corresponding to the nozzles of the upstream nozzle row are configured to be adjacent to the dots corresponding to the nozzles of the downstream nozzle row, starting from the central region side in the direction of the nozzle row.

2. In the liquid discharge head according to claim 1, The liquid discharge head is characterized in that the upstream nozzle row includes the uppermost nozzle row located on the upstream side in the direction of transport of the discharged medium.

3. In the liquid discharge head according to claim 1, The liquid discharge head is characterized in that the downstream nozzle row includes the downstreammost nozzle row located at the furthest downstream end in the direction of transport of the discharged medium.

4. In the liquid discharge head according to claim 1, The aforementioned upstream nozzle row is the uppermost nozzle row located at the uppermost end in the direction of transport of the discharged medium. The liquid discharge head is characterized in that the downstream nozzle row is the downstreammost nozzle row located on the downstream side in the direction of transport of the discharged medium.

5. In the liquid discharge head according to claim 4, A liquid dispensing head characterized by having one or more rows of nozzles between the upstream row of nozzles and the downstream row of nozzles.

6. In the liquid dispensing head according to any one of claims 1 to 5, Throughout the entire range in the direction of the nozzle row, the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row are configured to correspond to adjacent dots on the discharge medium. A liquid discharge head characterized in that the dot position relationship between the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row in one end region of the two end regions, and the dot position relationship between the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row in the other end region of the two end regions, are switched at a switching position on the upstream nozzle row and the downstream nozzle row, which is biased towards one end in the direction of the nozzle row.

7. In the liquid dispensing head according to any one of claims 1 to 5, Throughout the entire range in the direction of the nozzle row, the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row are configured to correspond to adjacent dots on the discharge medium. A liquid discharge head characterized in that the dot position relationship between the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row in one end region of the two end regions, and the dot position relationship between the nozzles of the upstream nozzle row and the nozzles of the downstream nozzle row in the other end region of the two end regions, are switched at the switching position on the upstream nozzle row and the downstream nozzle row, which is the central position in the direction of the nozzle row.

8. In the liquid dispensing head according to any one of claims 1 to 5, A liquid dispensing head characterized in that the upstream nozzle row and the downstream nozzle row are configured such that the positions of the nozzles, at least in the regions at both ends, are symmetrical with respect to the center in the direction of the nozzle row.

9. A liquid dispensing unit characterized by including a liquid dispensing head according to any one of claims 1 to 5.

10. A liquid dispensing device characterized by comprising a liquid dispensing head according to any one of claims 1 to 5.

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