US 12,089,023 B2
Micro speaker and diaphragm mold
Xingchi Chen, Shenzhen (CN); Weimin Chen, Shenzhen (CN); and Yao Hui, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Aug. 4, 2022, as Appl. No. 17/880,699.
Claims priority of application No. 202220242939.9 (CN), filed on Jan. 29, 2022.
Prior Publication US 2023/0247363 A1, Aug. 3, 2023
Int. Cl. H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H04R 9/025 (2013.01) [H04R 9/06 (2013.01); H04R 2307/204 (2013.01); H04R 2400/11 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A micro speaker, comprising:
a frame with a containment space;
a magnetic circuit system accommodated in the containment space;
a vibration system accommodated in the containment space, including a first diaphragm arranged on one side of the frame, and a dome skeleton fixed to the first diaphragm;
a voice coil fixed to the dome skeleton near a side of the magnetic circuit system, including a lead wire;
a welding plate structure fixed on a side of the dome skeleton where the voice coil locates at, for being electrically connected to the lead wire; wherein
the first diaphragm includes a first fixation part connected to the dome skeleton, a suspension connected to an outer side of the first fixation part, and a second fixation part connected to a side of the suspension away from the first fixation part and fixed to the frame;
the micro speaker further includes a first circuit board electrically connected to the welding plate structure and a second circuit board respectively fixed to two ends of the frame away from the second fixation par;
and wherein the first diaphragm includes a first diaphragm area whose projection along a vibration direction is located in a projection area of the first circuit board, and a second diaphragm area which is connected with the first diaphragm area and forms the first diaphragm together with the first diaphragm area; a thickness of the first diaphragm area is greater than a thickness of the second diaphragm area.