Drop-on-demand ink-jet printing head

摘要

A drop-on-demand ink-jet printing head, comprising a base plate (2), a nozzle plate defining a plurality of nozzle apertures, and a vibration unit which includes a plurality of piezoelectric vibrators (12) which are laminated. Concave portions (4a, 4a) are formed in the vibration plate (4) in the vicinity of portions where said free ends of the piezoelectric vibrators contact the vibration plate. <IMAGE>