Title:
LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/232461
Kind Code:
A1
Abstract:
The present application relates to the field of electro-acoustic conversion. Provided is a loudspeaker, comprising a lower cover, an upper cover which is assembled with the lower cover to form an accommodation cavity, and a loudspeaker unit accommodated in the accommodation cavity; the loudspeaker unit comprises a vibration system and two magnetic circuit systems which are used for driving the vibration system to vibrate and are spaced apart from each other in an opposite manner; each magnetic circuit system comprises a main magnetic steel assembly and a secondary magnetic steel assembly which is spaced apart from the main magnetic steel assembly to form a magnetic gap; and the vibration system comprises an upper vibration diaphragm, two voice coils which are respectively provided in the corresponding magnetic gaps, and a skeleton which is joined to one side of the upper vibration diaphragm and is used for connecting the upper vibration diaphragm and the voice coils. By means of the above arrangement, a larger magnetic circuit electromagnetic conversion factor BL can be provided for a loudspeaker product; and the heat dissipation area is increased by means of a double-magnetic circuit system, facilitating heat dissipation of the loudspeaker product during the operation process.
Inventors:
XIAO BO (CN)
LINGHU RONGLIN (CN)
LINGHU RONGLIN (CN)
Application Number:
PCT/CN2020/092756
Publication Date:
November 25, 2021
Filing Date:
May 28, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H04R9/06
Foreign References:
| CN201893909U | 2011-07-06 | |||
| CN207926906U | 2018-09-28 | |||
| CN104507018A | 2015-04-08 | |||
| CN204392551U | 2015-06-10 | |||
| CN111131977A | 2020-05-08 | |||
| TW201328371A | 2013-07-01 |
Attorney, Agent or Firm:
SHENZHEN CHINA INNOVATION SOUTH INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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