Title:
BONE CONDUCTION SPEAKER
Document Type and Number:
WIPO Patent Application WO/2019/134387
Kind Code:
A1
Abstract:
The present application relates to a magnetic circuit assembly for a bone conduction speaker. The magnetic circuit assembly generates a first magnetic field. The magnetic circuit assembly comprises a first magnetic element, and the first magnetic element generates a second magnetic field. The magnetic circuit further comprises a first magnetically permeable element and at least one second magnetic element. The at least one second magnetic element surrounds the first magnetic element and forms a magnetic gap between the at least one second magnetic element and the first magnetic element. The magnetic field strength of the first magnetic field in the magnetic gap is greater than the magnetic field strength of the second magnetic field in the magnetic gap.
Inventors:
ZHANG LEI (CN)
LIAO FENGYUN (CN)
QI XIN (CN)
LIAO FENGYUN (CN)
QI XIN (CN)
Application Number:
PCT/CN2018/104934
Publication Date:
July 11, 2019
Filing Date:
September 11, 2018
Export Citation:
Assignee:
SHENZHEN VOXTECH CO LTD (CN)
International Classes:
H04R9/02
Foreign References:
| CN102497611A | 2012-06-13 | |||
| CN106507252A | 2017-03-15 | |||
| CN104936108A | 2015-09-23 | |||
| CN202488645U | 2012-10-10 | |||
| JP2008054063A | 2008-03-06 |
Other References:
See also references of EP 3723388A4
Attorney, Agent or Firm:
METIS IP (CHENGDU) LLC (CN)
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