| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid droplet injection head or the like, in which a liquid supply means to a supply port is simplified, and a head is downsized.SOLUTION: The liquid droplet injection apparatus has: a drive unit having a vibration plate, a piezoelectric element provided on the vibration plate, a flow path forming plate provided under the vibration plate and partitioning a pressure chamber and a reservoir communicating with the pressure chamber, and a sealing plate provided to cover the piezoelectric element above the vibration plate and the piezoelectric element; a nozzle plate having nozzle holes for discharging a liquid in the pressure chamber; and a lid member having a supply port for supplying a liquid to the reservoir. When a direction for discharging the liquid through the nozzle holes is a first one, and a displacement direction of the vibration plate is a second one, the first one is orthogonal to the second one, and a direction for supplying the liquid to the reservoir through the supply port is the same as the first one. |
