FLUID EJECTION DEVICE AND MEDICAL APPARATUS

摘要

A fluid ejection device includes a fluid chamber, a volume varying unit, a fluid supplying unit, and an ejection pipe. The volume varying unit generates pulsation in the pressure of a fluid in the fluid chamber. The fluid supplying unit supplies the fluid to the fluid chamber through a first channel. The ejection pipe receives the supply of the fluid, in which the pulsation is generated, from the fluid chamber through a second channel and ejects the supplied fluid from an ejection port. In a connecting part to the fluid chamber, the cross-sectional area of the second channel is five times or more as large as the cross-sectional area of the first channel. In the connecting part to the fluid chamber, the first channel and the second channel are arranged to be opposed to each other via the vicinity of the center of the fluid chamber.

主权项

1. A fluid ejection device comprising:
a pulsation giving unit for ejecting fluid in a fluid chamber; a fluid supplying unit configured to supply the fluid to the fluid chamber through a first channel; and an ejection pipe configured to communicate with a second channel, which communicates with the pulsation giving unit, and eject the fluid from an ejection port, wherein a cross-sectional area of the second channel is five times or more as large as a cross-sectional area of the first channel, and a connecting part of the first channel and the fluid chamber and a connecting part of the second channel and the fluid chamber are arranged in positions opposed to each other via a vicinity of a center of the fluid chamber.