US 11,654,682 B2
Liquid discharge head
Hideki Hayashi, Nagoya (JP)
Assigned to Brother Kogyo Kabushiki Kaisha, Nagoya (JP)
Filed by Brother Kogyo Kabushiki Kaisha, Nagoya (JP)
Filed on Oct. 5, 2021, as Appl. No. 17/494,354.
Application 17/494,354 is a continuation of application No. 16/561,364, filed on Sep. 5, 2019, granted, now 11,155,091.
Application 16/561,364 is a continuation of application No. 15/849,766, filed on Dec. 21, 2017, granted, now 10,442,199, issued on Oct. 15, 2019.
Application 15/849,766 is a continuation of application No. 15/080,852, filed on Mar. 25, 2016, granted, now 9,878,539, issued on Jan. 30, 2018.
Claims priority of application No. 2015-074356 (JP), filed on Mar. 31, 2015.
Prior Publication US 2022/0024209 A1, Jan. 27, 2022
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/1433 (2013.01) [B41J 2/14233 (2013.01); B41J 2002/14419 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
an individual flow passage member in which individual flow passages are formed;
a common flow passage member which is joined to the individual flow passage member in a first direction and in which common flow passages are formed, the common flow passages being connected to the individual flow passages; and
a film which covers the common flow passages,
wherein the individual flow passage member has nozzle groups, pressure chamber groups, and connecting hole groups communicating with the nozzle groups via the pressure chamber groups respectively,
the individual flow passage member has a first surface and a second surface which are both end surfaces in the first direction, the first surface is further from the common flow passage member than the second surface, the nozzle groups are formed on the first surface, the connecting hole groups are formed on the second surface,
the common flow passages correspond to and are connected to the connecting hole groups, respectively,
each of the nozzle groups is formed along a second direction orthogonal to the first direction,
each of the connecting hole groups is formed along the second direction,
each of the common flow passages extends in the second direction and is connected to one of the nozzle groups via one of the connecting hole groups,
the connecting hole groups are arranged in a third direction which is orthogonal to the first direction and which intersects with the second direction,
the common flow passages are arranged in the third direction,
each of the common flow passages penetrates the common flow passage member in the first direction,
the common flow passage member has a third surface and a fourth surface which are both end surfaces in the first direction,
the third surface is in contact with the second surface of the individual flow passage member, and
the fourth surface is opposite to the third surface in the first direction and is covered by the film.