| 摘要 |
PURPOSE:To reduce and obstruct the residual vibration of a vibration unit, by providing a vibration unit part acting on an ink pressurizing liquid chamber and a vibration unit part protruded to the opposite side from a support point. CONSTITUTION:When a signal pulse P0 is inputted to a monomultivibrator 21 and a high voltage amplifier 26, the pulse P1 amplified by the high voltage amplifier 26 is applied to the electrode 1001 of a cantilevered beam vibration unit formed of electrodes 1001, 101, an electrostriction vibrator 102, a common electrode 103 and a vibration plate 104. This pulse P1 is applied between the common electrode 103 and the electrode 1001 and the vibration unit is bent downwardly from a support stand 9 being a fulcrum and ink is pressurized by a connection rod 10 and a diaphragm 11 to emit ink droplets. The pulse P0 operates monomultivibrators 21, 22 to generate output MM2S. The output MM2S is amplified by a high voltage amplifier 27 to be converted to a pulse P2 which is, in turn, applied between the electrode 101 and the common electrode 103 and acts so as to reduce and obstruct the residual vibration of the vibration unit. |
