| 摘要 |
<p>The present invention relates to a micro speaker of a dual diaphragm structure having an air damping layer wherein an acoustic characteristic is improved by dual diaphragms. The micro speaker of the present invention comprises a magnetic field generating unit for generating a direct current magnetic wave by a yoke having a magnet built-in and a plate; a voice coil having a coil inserted in a gap of the magnetic field generating unit, the voice coil being vibrated by an interaction between the direct current and an alternating current magnetic wave generated when a voice signal current flows in the coil; vibrating means having a dual structure wherein a first diaphragm and a second diaphragm attach stacked on each other, the vibrating means vibrating according to a vibration of the voice coil to generate a longitudinal wave; and a frame for supporting the first and the second diaphragms. In accordance with the micro speaker of a dual diaphragm structure of the present invention, two diaphragms having an air layer therebetween reduce an irregular vibration of the diaphragm by a damping function of the air layer, thereby obtaining a uniform vibration structure and minimizing a flat characteristic and a distortion.</p> |
