Title:
SPEAKER
Document Type and Number:
WIPO Patent Application WO/2022/203092
Kind Code:
A1
Abstract:
[Problem] To provide a speaker capable of performing feedback control by detecting the moving state of a movable part including a diaphragm. [Solution] A vibration part includes a diaphragm 3 and a bobbin 6, and a voice coil 7 is fixed to the bobbin 6. A detection unit 20 has a movable magnet 21 and a magnetic sensor 22. A ring-shaped magnet support 23 is fixed to the leading edge of the bobbin 6, and the movable magnet 21 is positioned and fixed on the magnet support 23. The magnetic sensor 22 is fixed to a drive support portion. Since the movable magnet 21 is fixed to the bobbin 6 through the magnet support 23, assembling and positioning of the movable magnet 21 is easy.
Inventors:
TOITA DAIKI (JP)
TACHI RYOSUKE (JP)
ITO RYO (JP)
TACHI RYOSUKE (JP)
ITO RYO (JP)
Application Number:
PCT/JP2022/017857
Publication Date:
September 29, 2022
Filing Date:
April 14, 2022
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
H04R9/02; H04R3/00; H04R9/04
Foreign References:
| JP2000308174A | 2000-11-02 |
Attorney, Agent or Firm:
NOZAKI Teruo (JP)
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