US 11,813,864 B2
Liquid ejection head and manufacturing method of liquid ejection head
Naoko Shimizu, Kanagawa (JP); Toru Nakakubo, Kanagawa (JP); Kazuhiro Yamada, Kanagawa (JP); Atsushi Teranishi, Kanagawa (JP); and Osamu Kanome, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 30, 2021, as Appl. No. 17/538,775.
Claims priority of application No. 2020-201148 (JP), filed on Dec. 3, 2020.
Prior Publication US 2022/0176700 A1, Jun. 9, 2022
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/14145 (2013.01) [B41J 2/1404 (2013.01); B41J 2/14016 (2013.01); B41J 2002/14306 (2013.01); B41J 2202/20 (2013.01); B41J 2202/21 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A liquid ejection head comprising:
a plurality of ejection orifices for ejecting liquid;
first to n-th common liquid chambers (n is an integer of 3 or more) arranged in parallel, through which the liquid is to flow, and connected to corresponding ejection orifices of the plurality of ejection orifices;
first to n-th common flow passages arranged in parallel in order of first to n-th and through which the liquid is to flow; and
first to n-th pitch conversion flow passages connecting the first to n-th common flow passages and the first to n-th common liquid chambers to each other and of which a periphery is formed with resin,
wherein the first to n-th common liquid chambers are positioned on a side of the first to n-th common flow passages,
wherein, in a case where a number of pitch conversion flow passages in a group is minimum on a condition that one or more of the first to n-th pitch conversion flow passages are respectively included in the group, the first to n-th pitch conversion flow passages have a repeating pattern in which the group is repeatedly arranged,
wherein the number of pitch conversion flow passages included in the group is greater than n, and
wherein at least one of two pitch conversion flow passages adjoining an m-th pitch conversion flow passage (m is all integers from 1 to n−2) is one of first to (m+1)-th pitch conversion flow passages.