US 11,997,449 B2
Ultra-thin speaker
Binghua Zheng, Weifang (CN); and Zhiyong Dong, Weifang (CN)
Assigned to Goertek Inc., Shandong (CN)
Appl. No. 17/627,331
Filed by Goertek Inc., Shandong (CN)
PCT Filed Dec. 27, 2019, PCT No. PCT/CN2019/129006
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/012611, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 201910656060.1 (CN), filed on Jul. 19, 2019.
Prior Publication US 2022/0272439 A1, Aug. 25, 2022
Int. Cl. H04R 1/28 (2006.01); H04R 7/26 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H04R 1/2811 (2013.01) [H04R 7/26 (2013.01); H04R 9/025 (2013.01); H04R 9/06 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An ultra-thin speaker, comprising:
a housing;
a magnetic circuit system adapted to generate a magnetic field disposed in the housing;
a vibration system comprising a cone assembly and a voice coil, wherein the cone assembly has a taper of less than or equal to 25°, a peripheral edge of the cone assembly is connected to the housing, and a middle part of the cone assembly has a through hole, the voice coil is fixedly connected at an edge of the through hole, the voice coil surrounds and is suspended around the magnetic circuit system, the voice coil is configured to be able to vibrate by an action of the magnetic field generated by the magnetic circuit system when a sound signal is introduced; and
a dust cap assembly comprising a dust cap body, wherein a central region of the dust cap body is fixedly connected to the magnetic circuit system, and an edge region of the dust cap body is connected to the cone assembly and is configured to be able to expand and contract along with the vibration of the cone assembly,
wherein the dust cap body comprises a fixing portion and a telescopic portion extending around the fixing portion, wherein the fixing portion is fixedly connected to a top of the magnetic circuit system, an edge of the telescopic portion is connected to the cone assembly so that the dust cap body covers the magnetic circuit system and the voice coil, and the telescopic portion is configured to expand and contract in response to vibration of the cone assembly.