INK JET HEAD DEVICE USING STACKED RING TYPE PIEZOELECTRIC ACTUATOR

摘要

PURPOSE: An ink jet head using a stacked ring type piezoelectric actuator is provided to increase ink discharge force at a low voltage by mounting an actuator formed of piezoelectric elements stacked in the shape of ring with electrodes mounted in two directions for generating large force and large deformation with respect to the small driving voltage. CONSTITUTION: An ink jet head using a stacked ring type piezoelectric actuator includes a nozzle plate(11) formed with at least one nozzle(12), a manifold part(51) having a restrictor plate(41) formed with at least one restrictor(40), a piezoelectric structure(22) provided between the nozzle plate and the manifold part and formed of cylindrical piezoelectric elements(22a-22c) stacked in multiple layers defining a chamber(20) inside for receiving ink, common electrodes(23) and drive electrodes(24) alternately interposed among the piezoelectric elements, and media(25) interposed between the restrictor plate and an end of the piezoelectric structure adjacent to the restrictor plate, and between the nozzle plate and the other end of the piezoelectric structure to be deformed in response to the deformation of the piezoelectric elements.