INK JET HEAD.

摘要

An ink jet head for a drop on-demand type ink jet printer. The driving electrodes can be easily and reliably connected to the external electrodes. Further, rotational action of the piezoelectric element during the driving is suppressed. Between the driving electrodes having insulating film and the external electrodes, there is provided an electrical connection material containing conductive grains which are harder than the insulating film and has a particle diameter larger than the thickness of the film. Recesses are provided in the bottoms of the grooves of the piezoelectric elements which function as ink chambers and pressure chambers. These recesses are formed by line segments connected at least by two line segments or line segments connected by one curved line. Part of the line segments which bring about the rotation of the piezoelectric elements is transformed into the component which establishes a shearing mode. <IMAGE>