Patent attributes
A liquid discharge head, the liquid discharge head including a liquid chamber and two electrode pins that are inserted in the liquid chamber from an upper portion of the liquid chamber. The two electrode pins are used to detect a remaining amount of liquid inside the liquid chamber on a basis of a communication state between the two electrode pins and are disposed on a centerline that is a line extending through a center of an upper surface of the liquid chamber in a moving direction of the liquid discharge head or a single electrode pin is disposed on each side of the centerline with the centerline interposed in between. An expression X1≧Z1/0.4 is satisfied, where X1 is an interval between the two electrode pins and Z1 is a difference in projection lengths of the two electrode pins in the liquid chamber.
