| 摘要 |
<p>Provided is a thin bidirectional speaker device in which driving units are not adversely affected by heat. The speaker device is provided with a pair of diaphragms (101, 102) disposed facing each other, a frame (12) for vibratably supporting the outer peripheries of the respective diaphragms along the vibration direction thereof, and plural driving units (14) for supporting the back sides of the respective diaphragms and imparting vibration to the diaphragms in response to an audio signal. The driving units (14) are provided with a pair of magnetic circuits (201, 202) in each of which a magnetic gap (20G) is formed along a direction different from the vibration direction of the diaphragms, a pair of voice coils (301, 302) each vibratably disposed along a uniaxial direction in the magnetic gap and vibrating to move closer to or away from each other in response to the audio signal, and a rigid vibration direction change section (50) for changing the direction of the vibration of the voice coils and transmitting the vibration changed in direction to the diaphragms. The vibration direction change section (50) is equipped with link portions (51) each disposed obliquely with respect to the direction of the voice coils with joints (52) respectively formed on the diaphragm side and the side of opposing ends of the pair of voice coils. Plural link portions (51) are provided so as to be symmetric with respect to two axes in the vibration direction of the voice coils and the vibration direction of the diaphragms.</p> |
