Patent ID: 7288874
Filing Date: 2007-10-30
Classification: B41J,H01L,Y10T

Abstract:
1. A piezoelectric actuator unit comprising: a plurality of piezoelectric vibrators formed by alternately laminating electrode layers and piezoelectric material layers so as to vibrate in a lamination direction of said layers, wherein: said plurality of piezoelectric vibrators are arranged in one row in a direction of vibrator arrangement perpendicular to said lamination direction, each piezoelectric vibrator includes an area on one side and an area on the other side in a vibrator width direction perpendicular to both said lamination direction and said vibrator arrangement direction, either of said area on one side and said area on the other side forms an active part capable of performing piezoelectric deformation, and the other area forms an inactive part incapable of performing piezoelectric deformation, an arrangement of said active part and said inactive part is opposite between adjacent piezoelectric vibrators, each piezoelectric vibrator has an individual electrode layer on a drive voltage input side, and all of said individual electrode layers of said plurality of piezoelectric vibrators are exposed on one side of said piezoelectric actuator unit in said vibrator width direction.