Patent ID: 7114798
Filing Date: 2006-10-03
Classification: B41J

Abstract:
1. A liquid ejecting apparatus comprising: a liquid ejecting head having a plurality of nozzle openings for ejecting liquid drops arranged in line, wherein: said liquid ejecting head has a flow path unit having a plurality of pressure chambers respectively interconnected to said plurality of nozzle openings, a plurality of elastic walls for respectively forming one face of each of said plurality of pressure chambers, and a nozzle plate where said plurality of nozzle openings are formed and a piezoelectric actuator unit which includes a plurality of piezoelectric vibrators respectively joined to said plurality of elastic walls via insular parts, deforms said elastic walls by deformation of said piezoelectric vibrators, and changes the volume of said pressure chambers, said plurality of piezoelectric vibrators are respectively formed by alternately laminating piezoelectric material layers and electrode layers and have active parts capable of performing piezoelectric deformation which are joined to said elastic walls, and said piezoelectric actuator unit further has a pair of unit fixing parts installed on both sides of said active parts in a vibrator width direction perpendicular to an arrangement direction of said plurality of nozzle openings, and said pair of unit fixing parts are joined to parts of said flow path unit other than said plurality of elastic walls of said flow path unit, thereby said piezoelectric actuator unit is fixed to said flow path unit, wherein at least one of said pair of unit fixing parts comprises a plurality of inactive parts incapable of performing piezoelectric deformation formed integrally with said active parts in said vibrator width direction as a part of each of said plurality of piezoelectric vibrators, wherein said piezoelectric material layers and said electrode layers are laminated perpendicularly to said nozzle plate and said piezoelectric vibrators vibrate in a lamination direction of both layers, and wherein at least one of said pair of unit fixing parts is joined to an end of said active part in said vibrator width direction and parts of said fixing members joined to said ends of said active parts are formed integrally with said plurality of piezoelectric vibrators in a comb-teeth shape.