Patent ID: 9221257
Filing Date: 2015-12-29
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a support member; a liquid chamber member being mounted on the support member through an adhesive and comprising a liquid chamber formed therein; and a recording element substrate being mounted on the liquid chamber member and comprising an ejection orifice from which liquid is ejected and a recording element configured to generate ejection energy, wherein the support member has a coefficient of linear expansion different from a coefficient of linear expansion of the liquid chamber member, wherein the liquid chamber member comprises: wherein a plan view shape of the recording element substrate mounting portion has a pair of opposing and parallel first sides and a pair of opposing second sides not perpendicular to the pair of first sides, wherein a plan view shape of the non-mounting portion exhibits a polygonal shape sharing one of the pair of the first sides and has a pair of third sides respectively connecting with the pair of second sides, wherein, in a case where a first angle formed by one of the pair of first sides and one of the pair of second sides is larger than 90 degrees, a third angle that is the sum of the first angle and a second angle formed by the one of the pair of first sides and one of the pair of third sides is larger than 180 degrees, and wherein, in a case where the first angle is smaller than 90 degrees, the third angle is smaller than 180 degrees.