Title:
SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/047188
Kind Code:
A1
Abstract:
[Problem] To provide a sound production device in which a sufficiently wide placement space for a diaphragm can be ensured and a magnetic field generation unit and an armature can be stably secured to a wide mounting surface.
[Solution] A driving-side frame 5 and a vibration-side frame 6 are superposed and joined, and an outer peripheral portion of the driving-side frame 5 is sandwiched between a lower case 3 and an upper case 4. An opening 6c having a large area is formed in the vibration-side frame 6, and a flexible sheet 12 to which a diaphragm 11 is affixed is joined to the opening 6c. The lower surface of the driving-side frame 5 serves as a mounting surface 5a having a large area, and a magnetic field generation unit 20 and a support member 31 for supporting an armature 32 are secured to the mounting surface 5a in a stable state.
Inventors:
NUMATA TAISHI (JP)
SATO YUTAKA (JP)
SATO KIYOSHI (JP)
SATO HIDEJI (JP)
SATO YUTAKA (JP)
SATO KIYOSHI (JP)
SATO HIDEJI (JP)
Application Number:
PCT/JP2016/068486
Publication Date:
March 23, 2017
Filing Date:
June 22, 2016
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
International Classes:
H04R11/02
Foreign References:
| JP2012004850A | 2012-01-05 | |||
| US20150010199A1 | 2015-01-08 | |||
| JPS58104597A | 1983-06-22 |
Other References:
See also references of EP 3352478A4
Attorney, Agent or Firm:
NOZAKI, Teruo (JP)
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