US 9,813,821 B1
Miniature sound generator
Wei Song, Shenzhen (CN); Shuwen Wu, Shenzhen (CN); and Yuxin Gu, Shenzhen (CN)
Assigned to AAC TECHNOLOGIES PTE. LTD., Singapore (SG)
Filed by Wei Song, Shenzhen (CN); Shuwen Wu, Shenzhen (CN); and Yuxin Gu, Shenzhen (CN)
Filed on Nov. 17, 2016, as Appl. No. 15/354,584.
Claims priority of application No. 2016 2 0581277 U (CN), filed on Jun. 15, 2016.
Int. Cl. H04R 9/06 (2006.01); H04R 3/00 (2006.01); H04R 9/02 (2006.01)
CPC H04R 9/06 (2013.01) [H04R 3/00 (2013.01); H04R 9/025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A miniature sound generator, comprising:
a vibration system including a diaphragm, a voice coil, and a damping part supporting the coil elastically, the voice coil being located below the diaphragm for driving the diaphragm to vibrate and including a pair of long shaft sides and a pair of short shaft sides; the damping part including a circuit board arranged on one short shaft side for electrically connecting with the voice coil, and an insulated symmetrical plate arranged on the other short shaft side;
a fixing system; wherein
the damping part is only arranged at the short shaft sides symmetrically, with one end thereof being fixed with the fixing system, and the other end thereof being fixed with the voice coil; and
the insulated symmetrical plate has a damping coefficient same to that of the circuit board.