| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic speaker device having a structure that can achieve a bone conduction speaker having excellent acoustic performance with a simple structure, and is easily applicable to air conduction speaker.SOLUTION: A dynamic speaker device includes a voice coil 18 in which a coil 28 is wound on the outer periphery of a cylindrical bobbin 26, a diaphragm plate 20 which is a plate-like elastic member and has one surface to which an end portion 26b of the bobbin 26 is fixed, and a diaphragm support member 22 which is disposed inside the bobbin 26 and fixedly supports a base portion 20a located at the center of the diaphragm 20. Upon supply of voice current to the coil 28, the voice coil 18 vibrates, and in response to this vibration, the diaphragm 20 vibrates. There are a configuration that bone-conducted sounds are output to the outside through the diaphragm 20 and a configuration that air conduction sounds are output to the outside through cone-shaped or dome-shaped vibrating membranes 38 and 44 secured to the diaphragm 20.SELECTED DRAWING: Figure 1 |
