CN-114055938-B - Liquid ejecting head and liquid ejecting apparatus

CN114055938BCN 114055938 BCN114055938 BCN 114055938BCN-114055938-B

Abstract

The invention provides a liquid ejecting head and a liquid ejecting apparatus capable of improving printing quality by suppressing deviation in ejection characteristics of liquid droplets between nozzle rows. The liquid ejecting head ejects liquid in a +Z direction which is a third direction orthogonal to the first direction and the second direction, and includes a first introduction portion, a second introduction portion, a first filter chamber group having a first filter chamber and a second filter chamber, a second filter chamber group having a third filter chamber and a fourth filter chamber, a first supply flow path for supplying liquid from the first introduction portion to the first filter chamber group, and a second supply flow path for supplying liquid from the second introduction portion to the second filter chamber group, wherein the first introduction portion, the second introduction portion, the first filter chamber group, and the second filter chamber group are arranged in this order toward the +X direction which is the first direction.

Inventors

Zhong Jiangguigong
OKUBO KATSUHIRO
HAGIWARA YOSHIYUKI
ITO NOBUAKI
Sheng Jiasun

Assignees

精工爱普生株式会社

Dates

Publication Date: 20260505
Application Date: 20210728
Priority Date: 20200731

Claims (11)

1. A liquid ejecting head which ejects liquid in a third direction orthogonal to a first direction and a second direction, the liquid ejecting head being configured to have the first direction as a longitudinal direction and the second direction as a width direction, the liquid ejecting head comprising: a first introduction portion for introducing a liquid from the outside; A second introduction portion for introducing a liquid from the outside; A first filter chamber group having a first filter chamber having a first filter inside and a second filter chamber having a second filter inside that is independent of the first filter; a second filter chamber group having a third filter chamber having a third filter inside and a fourth filter chamber having a fourth filter inside; A first supply flow path for supplying liquid from the first introduction portion to the first filter chamber group; A second supply flow path for supplying liquid from the second introduction portion to the second filter chamber group, The first introduction portion, the second introduction portion, the first filter chamber group, and the second filter chamber group are arranged in this order toward the first direction.
2. The liquid ejecting head according to claim 1, wherein, The first supply flow passage being branched at a first branching position so that liquid is distributed to the first filter chamber and the second filter chamber, The second supply flow passage being branched at a second branching position so as to distribute the liquid to the third filter chamber and the fourth filter chamber, The first branching position is arranged between the first filter chamber and the second filter chamber when viewed along a plane viewed in the third direction, The second branching position is disposed between the third filter chamber and the fourth filter chamber when viewed in plan.
3. The liquid ejecting head according to claim 1 or 2, wherein, The first filter chamber and the second filter chamber are arranged in such a manner as to be spaced apart in the second direction, The third filter chamber and the fourth filter chamber are disposed at intervals in the second direction.
4. The liquid ejecting head according to claim 3, wherein, The third filter chamber is arranged side by side in the first direction with respect to the first filter chamber, The fourth filter chamber is disposed side by side in the first direction relative to the second filter chamber.
5. The liquid ejecting head according to claim 4, wherein, The first filter chamber has a first outflow opening for letting out liquid, The third filter chamber has a third outlet port through which the liquid flows out, The liquid ejecting head is provided with a first head chip having a first nozzle row and a third nozzle row that eject liquid, The first head chip has: a first inlet for introducing liquid which flows out from the first outlet and is supplied to the first nozzle row; A third inlet for introducing the liquid which flows out from the third outlet and is supplied to the third nozzle row, When viewed along a plane in the third direction, a line segment connecting the first outlet and the third outlet overlaps with a line segment connecting the first inlet and the third inlet.
6. The liquid ejecting head according to claim 5, wherein, The first outflow port and the third outflow port are arranged side by side in the first direction, The first inlet and the third inlet are arranged side by side in the second direction, The center positions of the first outlet and the third outlet and the center positions of the first inlet and the third inlet are substantially identical to each other in plan view.
7. The liquid ejecting head according to claim 5 or 6, wherein, The first filter chamber and the third filter chamber are each lengthwise in the second direction.
8. The liquid ejecting head according to claim 1, wherein, The shape of the liquid ejection head when viewed along a plane of the third direction has a first portion and a second portion that adjoins the first portion and protrudes from the first portion in a direction opposite to the first direction, The second portion has a dimension in the second direction that is less than a dimension in the second direction of the first portion, The second portion is arranged in a manner biased in the second direction or in a direction opposite to the second direction, The first introduction portion and the second introduction portion are arranged so as to overlap with the second portion when viewed in plan, The first filter chamber group and the second filter chamber group are arranged so as to overlap with the first portion when viewed in plan.
9. The liquid ejecting head according to claim 8, wherein, The dimension of the second portion in the second direction is less than half the dimension of the first portion in the second direction, The second portion is disposed closer to the second direction or in a direction opposite to the second direction than a center of the first portion in the second direction.
10. The liquid ejecting head according to claim 8, wherein, Each dimension of the first introduction portion and the second introduction portion in the second direction is half or more of a dimension of the second portion in the second direction.
11. A liquid ejecting apparatus is characterized by comprising: the liquid ejection head of any one of claims 1 to 10; and a conveying unit that conveys the medium.

Description

Liquid ejecting head and liquid ejecting apparatus Technical Field The present invention relates to a liquid ejecting head and a liquid ejecting apparatus that eject liquid from nozzles, and more particularly, to an inkjet recording head and an inkjet recording apparatus that eject ink as liquid. Background A liquid ejecting apparatus represented by an inkjet recording apparatus such as an inkjet printer and a plotter includes a liquid ejecting head capable of ejecting liquid such as ink stored in an ink cartridge, a tank, or the like in the form of droplets. Such a liquid jet head is difficult because it is possible to lengthen (multiply) and increase the density of the nozzles in a single body, which leads to an increase in the size of the liquid jet head, a decrease in the yield, and an increase in the manufacturing cost. In view of the above, there has been proposed a liquid ejecting head in which a plurality of head chips for ejecting liquid are fixed to a common flow path member, thereby lengthening nozzles. In the liquid ejecting head, for example, nozzle rows extending in the X direction are provided side by side along the Y direction, two nozzle rows are provided for each color liquid, and one filter chamber is provided in the flow path member so as to correspond to each nozzle row. Further, a structure is disclosed in which ink introduced from one connection portion of a flow path member is branched immediately below the connection portion and distributed to two filter chambers (for example, refer to patent document 1). In addition, in the liquid ejecting head, head chips are arranged offset in the extending direction of the nozzle rows, and filter chambers are provided so as to correspond to the respective head chips. Further, a structure is disclosed in which a supply port for supplying liquid is provided at an end portion in a longitudinal direction of a liquid ejecting head so as to avoid an electric element disposed on a center side (for example, refer to patent document 2). However, in the liquid jet head of patent document 1, since there is a difference in the length of the flow path from the position of the connection portion to which the liquid is supplied to each filter chamber, there is a problem that there is a variation in the pressure loss between the nozzle rows of the same series of head chips, and there is a possibility that there is a variation in the ejection characteristics of the liquid droplets, and the print quality is degraded. Further, as in patent document 2, in a configuration in which a plurality of supply ports for supplying liquid are arranged in the longitudinal direction of the liquid ejecting head and a plurality of supply ports are provided at positions offset from the region where a plurality of filter chambers are provided, there is a problem in that pressure loss is more likely to occur between nozzle rows of the same series of head chips, and variation occurs in ejection characteristics of liquid droplets, and there is a possibility that print quality is degraded. Such a problem is also present in not only the inkjet recording head but also the liquid ejecting head that ejects liquid other than ink. Patent document 1 Japanese patent application laid-open No. 2016-196169 Patent document 2 Japanese patent application laid-open No. 2020-49874 Disclosure of Invention The liquid ejecting head according to the aspect of the present invention for solving the above-described problems is characterized by comprising a first introduction portion for introducing liquid from the outside, a second introduction portion for introducing liquid from the outside, a first filter chamber group having a first filter chamber and a second filter chamber, a second filter chamber group having a third filter chamber and a fourth filter chamber, a first supply flow path for supplying liquid from the first introduction portion to the first filter chamber group, and a second supply flow path for supplying liquid from the second introduction portion to the second filter chamber group, wherein the first introduction portion, the second introduction portion, the first filter chamber group, and the second filter chamber group are arranged in this order toward the first direction. Another aspect of the present invention relates to a liquid ejecting apparatus including the liquid ejecting head according to the aspect, and a conveying unit configured to convey a medium. Drawings Fig. 1 is a diagram schematically showing a schematic configuration of a recording apparatus. Fig. 2 is an exploded perspective view of the head module. Fig. 3 is a plan view of the head module. Fig. 4 is a perspective view of the recording head viewed in the +z direction. Fig. 5 is an exploded perspective view of the recording head as viewed in the +z direction. Fig. 6 is an exploded perspective view of the recording head as viewed in the-Z direction. Fig. 7 is a plan view of the recording head viewed in the +z direction