| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electro-dynamic exciter which makes the deterioration of electro-acoustic conversion characteristics and damage due to contacts less likely to be caused even when mounted on a vertical wall in a vertical manner and concurrently improves low frequency characteristics in the electro-acoustic characteristics. <P>SOLUTION: An electro-dynamic exciter includes: a bowl-shaped outer yoke; a magnet circuit part including a magnet disposed so as to be enclosed by the bowl-shaped outer yoke and an inner yoke; a coil disposed in a magnetic gap formed in the magnet circuit part; a diaphragm to which the coil is fixed; and elastic bodies elastically connecting the diaphragm with the magnet circuit part so as to form a predetermined space between the diaphragm and the magnet circuit part. The elastic bodies are composed of at least two elastic bodies, a first elastic body and a second elastic body, and the first elastic body and the second elastic body connect an area near an outer periphery of the outer yoke with an area near an outer periphery of the diaphragm so as to generate pressing forces opposing each other in the axial direction that is the vibration direction of the diaphragm. <P>COPYRIGHT: (C)2012,JPO&INPIT |
