| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve acoustic characteristics by suppressing a variance of the sound pressure in a frequency region considered as the sound output range, particularly in a high frequency band. <P>SOLUTION: The acoustic transducer is provided with a driving unit 2 comprising a pair of magnets 6, 6, a yoke 5, a coil 7, and an armature 9 fixed to the yoke and having a vibrating part 14 which penetrates the coil and is arranged between a pair of magnets so as to vibrate when driving current is supplied to the coil; and a diaphragm unit 3 comprising a holding frame 20 having an opening part, a resin film 21 stuck to the holding frame, a diaphragm 22 held inside the holding frame, and a beam part 23 transmitting the vibration of the vibrating part to the diaphragm. The beam part is connected to one end of the diaphragm, and a predetermined space M is formed between the other end of the diaphragm and the inner surface of the holding frame to apply an adhesive agent 24 into the predetermined space so that the other end of the diaphragm and the holding frame is connected via the adhesive agent. <P>COPYRIGHT: (C)2012,JPO&INPIT |
