Title:
LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/000066
Kind Code:
A1
Abstract:
Provided is a loudspeaker, comprising a basket, and a vibration system and a magnetic circuit system having magnetic gaps, which vibration system and magnetic circuit system are respectively fixed to the basket. The vibration system comprises a vibrating diaphragm fixed to the basket, and a voice coil inserted into the magnetic gaps to drive the vibrating diaphragm to generate sound. The magnetic circuit system comprises a magnetic yoke fixed to the basket, main magnetic steel fixed to the magnetic yoke, secondary magnetic steel respectively located on two opposite sides of the main magnetic steel and spaced apart from the main magnetic steel to form the magnetic gaps, and a pole core arranged on the main magnetic steel in a stacked manner. The magnetic circuit system further comprises clamping plates arranged on the secondary magnetic steel in a stacked manner, and two pieces of secondary magnetic steel arranged on the clamping plates in a stacked manner. The voice coil comprises two short edges arranged opposite each other at an interval, and two long edges respectively connected to the two short edges and arranged opposite each other at an interval, with the long edges being of a curved structure. By means of the loudspeaker provided in the present application, the effective magnetic gap length is increased, the magnetic circuit force coefficient is increased, and the acoustic performance and reliability of a sound generator are improved.
Inventors:
XIAO BO (CN)
LING HU RONGLIN (CN)
LIU XIAODONG (CN)
LING HU RONGLIN (CN)
LIU XIAODONG (CN)
Application Number:
PCT/CN2019/093945
Publication Date:
January 07, 2021
Filing Date:
June 29, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
International Classes:
H04R9/06
Foreign References:
| CN203136148U | 2013-08-14 | |||
| CN103997710A | 2014-08-20 | |||
| CN207304910U | 2018-05-01 | |||
| CN207652689U | 2018-07-24 | |||
| CN205336525U | 2016-06-22 | |||
| US20110043056A1 | 2011-02-24 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYUANLIHE PATENT AND TRADEMARK FIRM (GENERAL PARTNERSHIP) (CN)
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