| 摘要 |
A liquid droplet ejecting device (10) comprising a liquid supply passage (21), a plurality of independent pressurizing chambers (22, ... 22), a plurality of liquid introducing holes (23, ... 23) allowing each pressurizing chamber (22) to communicate with the liquid supply passage (21), and a plurality of ejecting nozzles (24, ...24) allowing each pressurizing chamber (22) to communicate with the exterior of the liquid droplet ejecting device (10). Each ejection hole (24a) at the tip end of an ejection nozzle (24) has a hollow cylindrical shape with its inner diameter gradually increasing toward the ejection port. When a potential difference is applied to the electrodes on the opposite sides of a piezoelectric/electrostriction element (17), a ceramic sheet (16) constituting the upper wall of an pressurizing chamber (22) deforms to cause the volume of the pressurizing chamber to change and a liquid pressure inside the pressurizing chamber to increase, thereby concurrently ejecting a plurality of fine liquid droplets from the ejection port.
|
