Patent ID: 9724918
Date: 2017-08-08
CPC Classifications: B41J

Claim:
1. A liquid ejecting head comprising: a channel member including a plurality of ejection holes, a plurality of compression chambers connected to the plurality of ejection holes, a common channel that supplies liquid to the plurality of compression chambers; and a plurality of compressing portions that compress the liquid in the plurality of compression chambers, wherein the channel member includes a plurality of plates that include a hole or a groove and that are stacked together to constitute a channel, and wherein, in a plan view of the channel member, the common channel is long in one direction, two compression chamber rows, in which the plurality of compression chambers are arranged next to each other, are arranged one on each side of the common channel so as to extend in the one direction, one of the two compression chamber rows being defined as a first compression chamber row and another of the two compression chamber rows being defined as a second compression chamber row, the compression chambers belonging to the first compression chamber row are connected to the common channel by first restricting portions, the first restricting portions including first restricting-portion bodies that extend in a direction perpendicular to a stacking direction, first inlets that connect the first restricting-portion bodies to the common channel in the stacking direction at a side of the first restricting-portion bodies that is adjacent to the common channel, and first outlets that connect the first restricting-portion bodies to the compression chambers in the stacking direction at a side of the first restricting-portion bodies that is adjacent to the compression chambers, the compression chambers belonging to the second compression chamber row are connected to the common channel by second restricting portions, the second restricting portions including second restricting-portion bodies that extend in a direction perpendicular to the stacking direction, second inlets that connect the second restricting-portion bodies to the common channel in the stacking direction at a side of the second restricting-portion bodies that is adjacent to the common channel, and second outlets that connect the second restricting-portion bodies to the compression chambers in the stacking direction at a side of the second restricting-portion bodies that is adjacent to the compression chambers, the first restricting-portion bodies and the second restricting-portion bodies extend in a direction that crosses the one direction and are alternately arranged in the one direction, and when a direction perpendicular to the one direction is defined as other direction, the first inlets are on one side of the second outlets in the other direction, the second inlets are on other side of the first outlets in the other direction, and the first inlets have an opening width greater than an opening width of the second outlets, and the second inlets have an opening width greater than an opening width of the first outlets.