| 摘要 |
PROBLEM TO BE SOLVED: To convert driving current into vibrational energy effectively by bringing a vibrating body which vibrates into collision with a section where it is fixed in proximity to the top and bottom of an electroacoustic transducer, thus generating vibration to the outside. SOLUTION: A vibrating body 1 is supported at a position a little distant from a collision part 2 by a damper 7, and when driven at a relatively low frequency, the displacement of the vibrating body 1 becomes larger, therefore, it comes into collision with a collision part 2. An annular flat part 8 which collides with the collision part 2 is robust in construction and collides averagely. The vibration generated by collision is transmitted to a supporting beam 12 and then to the outside from its peripheral part 10. When a receive signal is announced with vibration, the vibrating body 1 is driven at a low frequency of several hundred Hz or less to transmit colliding vibration with the collision part 2 to the outside. The vibrating direction at this time is only vertical, therefore, vibrational energy can be taken out to the outside with high efficiency. It is thus possible to convert driving current into vibrational energy effectively. |
