| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric speaker, having characteristics of efficient generation of a transversal wave by pressing upper and lower faces of a honeycomb diaphragm with a guide component to apply a certain flexure stress, the elimination of sound reflection and sound reverberation, and the reach of clear voice far away, and enabling mass production at low cost by the selection of a speaker configuration member.SOLUTION: A vibration proof rubber 5 is mounted on the outer peripheral part of a honeycomb diaphragm 1. Through the vibration proof rubber, the diaphragm is pressed by means of an upper guide component 2 and a lower guide component 3, having curve surface shapes, from the upper and lower faces, so that the diaphragm is bent. To the diaphragm having the added constant flexure stress, a ceramic piezoelectric element 4 is attached using a resin screen and a nut 6, to thereby provide a piezoelectric speaker generating a transversal wave. By the selection of a speaker configuration member, the characteristics of nonmagnetism and fire resistance can be given. Also, dust emission from the speaker can exceedingly be reduced. |
