US 11,930,343 B2
Sound producing unit, sound producing module, and electronic terminal
Hanlong Cheng, Shandong (CN); Chengfei Zhang, Shandong (CN); and Chunfa Liu, Shandong (CN)
Assigned to Goertek Inc., Shandong (CN)
Appl. No. 17/050,985
Filed by GOERTEK INC., Shandong (CN)
PCT Filed Dec. 11, 2018, PCT No. PCT/CN2018/120394
§ 371(c)(1), (2) Date Oct. 27, 2020,
PCT Pub. No. WO2019/205661, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 201810395906.6 (CN), filed on Apr. 27, 2018; and application No. 201820623346.0 (CN), filed on Apr. 27, 2018.
Prior Publication US 2021/0235196 A1, Jul. 29, 2021
Int. Cl. H04R 9/06 (2006.01); H04R 1/02 (2006.01); H04R 3/00 (2006.01); H04R 9/04 (2006.01)
CPC H04R 9/06 (2013.01) [H04R 1/026 (2013.01); H04R 3/00 (2013.01); H04R 9/045 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A sound generating unit, comprising a magnetic circuit system, a vibration system, and a circuit board, wherein the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit portion and a side magnetic circuit portion each arranged on the magnetic yoke; wherein at least one of the central magnetic circuit portion and the side magnetic circuit portion comprises a permanent magnet, and the central magnetic circuit portion and the side magnetic circuit portion form a magnetic gap therebetween; wherein the vibration system comprises a diaphragm and a voice coil connected with a first end thereof to the diaphragm and extending with a second end thereof into the magnetic gap of the magnetic circuit system;
wherein, the voice coil includes two voice coil wires wound together, and each voice coil wire having a wire-in end and a wire-out end; the voice coil having on a first side thereof lead-out positions of two wire-in ends, and on a second side thereof lead-out positions of two wire-out ends; the two wire-in ends and the two wire-out ends being respectively electrically connected to corresponding pads of the circuit board, and the circuit board having an internal circuit configured to electrically connect the two wire-in ends together and to electrically connect the two wire-out ends together;
the side magnetic circuit portion is formed with an accommodating groove at a side away from the magnetic gap, and the circuit board is of a hollow ring shape and is arranged in the accommodating groove.