Patent ID: 6568797
Filing Date: 2003-05-27
Classification: B41J

Abstract:
An ink jet head, comprising:a base board; two partition walls made of an piezoelectric material and mounted on the base board; a cover plate mounted on the two partition walls so as to construct an ink flow passage, wherein an inner surface of the base board forms a bottom portion of the ink flow passage and the ink flow passage is provided with an ink inlet side at one end thereof and an ink outlet side at another end; two driving electrodes, wherein one of the two driving electrodes is provided on one of the two partition walls and the other of the two driving electrodes is provided on the other of the two partition walls, each of the two driving electrodes elongated to have a length corresponding to the ink flow passage between the ink inlet side and the ink outlet side; the base board having at least two through holes at two positions between the ink inlet side and the ink outlet side on the bottom portion of the ink flow passage; and at least two lead conductors provided in the two through holes, one end of each of the two lead conductors connected to the two driving electrodes and another end of each of the two lead conductors connected to a driving circuit, whereby each of the two driving electrodes is applied with the same voltage at two positions through the two lead conductors from an outer surface side of the base board by the driving circuit.