| 摘要 |
In the ink jet printer head and the ink jet printer of this invention, accurate gradation printing can be performed at a high speed. The ink 34 is introduced to be supplied from the ink tank to a quantified liquid chamber 8 of the quantified part 2 via a liquid supply channel 15. When voltage is applied to the piezoelectric element 11, it is distorted in the height direction. However, since the upper side is fixed to the piezo element support 5, the piezoelectric element 11 elongates in the downward direction. Therefore, the piston 12 is pressed down and the volume of the quantifying part liquid chamber 8 is reduced, so that the ink 34 is flowed out from the liquid flow channel 14 in the amount corresponding to the reduced volume, namely the quantified ink 34. This quantified ink 34 is mixed with the transparent solvent 35 discharged from the base 1.
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