| 摘要 |
PURPOSE:To attain small size and light weight of a vibrator and high power by adopting the relation of 1/2S2<=S1<=S2 (S1 is an area formed with a small projection of a sub head mass and S2 is an area of a circle formed by the center part of a piezoelectric ceramic). CONSTITUTION:The Langevin vibrator tightened by bolts is equipped with a ring form piezoelectric ceramic 12, a head mass 11 arranged before and after the ceramic 12, a rear mass 13 and a bolt 14 tightening them. A hole is formed to the center of the head mass 11 and the sub head mass 31 connected through the hole with the bolt 14 is provided. The head mass 11 and the sub head mass 31 are in contact with a face at a right angle to the center axis or at a prescribed angle except a right angle. The relation of 1/2S2<=S1<=S2 is obtained, where S1 is an area formed by a small projection of the sub head mass 31 and S2 is an area of a circle formed by the center of the thickness of the piezoelectric ceramic, and small size/light weight and high power are attained. |
