Patent ID: 7566117

Claim:
An inkjet recording head comprising: a nozzle portion ejecting an ink drop; an ink flow path member including the nozzle portion; a driving section moving the ink flow path member in an ink drop ejecting direction and an opposite direction; and a beam member joined to the ink flow path member, wherein the driving section moves the ink flow path member in the ink drop ejecting direction, and applies inertia in the ejecting direction to internal ink by one of suddenly stopping the ink flow path member and moving the ink flow path member in the opposite direction, and makes the ink drop be ejected from the nozzle portion, after the driving section elastically bendingly deforms the beam member such that the beam member becomes concave in the ink drop ejecting direction, the driving section bucklingly reversely deforms the beam member such that the beam member becomes convex in the ink drop ejecting direction, and applies the inertia in the ejecting direction to the ink in a vicinity of the nozzle portion, and makes the ink drop be ejected from the nozzle portion, and the driving section holds one of one longitudinal direction end of the beam member and both longitudinal direction ends of the beam member so as to be freely rotatable in the ink drop ejecting direction, and compresses the beam member in a longitudinal direction of the beam member so that the beam member becomes concave in the ink drop ejecting direction, and rotates the one of the one longitudinal direction end of the beam member and the both longitudinal direction ends of the beam member so as to bucklingly reversely deform the beam member such that the beam member becomes convex in the ink drop ejecting direction, and applies the inertia in the ejecting direction to the ink in the vicinity of the nozzle portion, and makes the ink drop be ejected from the nozzle portion.