| 摘要 |
PROBLEM TO BE SOLVED: To provide a more usable portable telephone.SOLUTION: A main vibration face of a piezoelectric bimorph element is supported in a housing structure so that it inclines to a display face by about 30 degrees to 60 degrees to obtain cartilage conduction vibration. An inclined plane parallel to the main vibration face is arranged between the display face and a side face, which are orthogonal in a housing outer face. The housing outer face includes a columnar surface surrounding a cartilage conduction vibration section. Vibrations of confronted portions or crossing portions of a pair of inclined main vibration faces are transmitted to the display face and the side face or a top face orthogonal to the display face. A center of the piezoelectric bimorph element is supported and the vibrations at both ends are permitted. A support section is shifted from the center. Both the ends of the piezoelectric bimorph element are supported and the vibration of the center is permitted. A vibration conduction elastic body is interposed between the housing structure and the main vibration face and the piezoelectric bimorph element is supported inside the housing structure. |
