Title:
SOUND PRODUCING DEVICE, SOUND PRODUCING MODULE, AND ELECTRONIC TERMINAL
Document Type and Number:
WIPO Patent Application WO/2019/205658
Kind Code:
A1
Abstract:
The present application discloses a sound producing device, a sound producing module, and an electronic terminal. The sound producing device comprises a magnetic circuit system, a vibration assembly, and a circuit board. The magnetic circuit system comprises: a magnetic yoke; and a central magnetic portion and a side magnetic portion which are disposed on the magnetic yoke. At least one of the central magnetic portion and the side magnetic portion comprises a permanent magnet. A magnetic gap is formed between the central magnetic portion and the side magnetic portion. An accommodation slot is formed at a side of the side magnetic portion away from the magnetic gap. The vibration assembly comprises a diaphragm and a voice coil. One end of the voice coil is connected to the diaphragm, and the other end extends into the magnetic gap of the magnetic circuit system. The circuit board has an annular shape, and is inserted into the accommodation slot of the magnetic circuit system. The sound producing device of the present application has a more compact structure, thereby facilitating miniaturization and a lightweight design. In addition, the side magnetic portion is provided with the accommodation slot at the periphery, thereby enabling concentration of magnetic induction lines and improving field strength in the magnetic gap.
Inventors:
CHENG HANLONG (CN)
ZHANG CHENGFEI (CN)
LIU CHUNFA (CN)
ZHANG CHENGFEI (CN)
LIU CHUNFA (CN)
Application Number:
PCT/CN2018/120389
Publication Date:
October 31, 2019
Filing Date:
December 11, 2018
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R9/02
Foreign References:
| CN106954149A | 2017-07-14 | |||
| CN205545920U | 2016-08-31 | |||
| CN105916083A | 2016-08-31 | |||
| CN202799131U | 2013-03-13 |
Attorney, Agent or Firm:
BEYOND TALENT PATENT AGENT FIRM (CN)
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