| 摘要 |
PURPOSE:To lower the cost required in the maintenance of an ink jet head, by providing the resistor element corresponding to a piezoelectric element on the ink jet head and connecting the piezoelectric element and a piezoelectric element driving circuit through the resistor element while making it possible to adjust the driving voltage to the piezoelectric element by using the resistor element. CONSTITUTION:A resistor pattern 13 and a piezoelectric element 14 are connected by a lead wire 14 and the printed circuit board, which is provided with the drive circuit for supplying a driving pulse to said piezoelectric element 12 is connected to the resistor pattern 13 by a connecting lead wire 15 and a pressure contact element 16, and the pressure contact element 16 is attached on a relay stand 17 by a screw 18 so as to be made positionally adjustable before and behind. The leading end of the pressure contact element 16 is contacted with the resistor pattern under pressure at a C-point and the distance (l) between the B-point being the connection point of the lead wire 14 and the C-point is regulated by moving the before-and-behind position of said pressure contact element to regulate the voltage applied to the piezoelectric element 12. |
