Patent ID: 8794742

Claim:
A discharge head comprising: a tubular member that includes a flat portion with an oblate shape where a cross-section of a tube path extends in a first direction that is perpendicular to the tube path, the tubular member being formed so that the flat portion includes a first wall that is flat and configured so that an actuator can be attached to an outside thereof and the flat portion becomes a cavity with an internal volume thereof varying due to displacement of the first wall; and a nozzle opening that is provided at one end of the tubular member and discharges a liquid substance due to variation in the internal volume of the cavity, wherein the tubular member includes a first cylindrical portion at one end of the flat portion and a second cylindrical portion positioned at a second end of the flat portion, and a narrowed part at a side of the second cylindrical portion opposite the flat portion in the tube path, the narrowed part being more narrow than the second cylindrical portion, the tubular member being seamlessly made of a glass tube, a resin tube, a ceramic tube, or a metal tube, the flat portion being wider than the first cylindrical portion and the second cylindrical portion in the first direction, and narrower than the first cylindrical portion and the second cylindrical portion in a second direction that is perpendicular to the first direction.