SOUND PRODUCTION DEVICE - ALPS ELECTRIC CO LTD

Title:

SOUND PRODUCTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/126040

Kind Code:

A1

Abstract:

[Problem] To provide a sound production device which enables easier assembling work and high-accuracy setting of relative positions of an armature and a diaphragm, and which eliminates the need for positioning work. [Solution] A flexible sheet 12 to which a diaphragm 11 is affixed is joined to a vibration-side mounting surface 5b of a frame 5. A subassembly formed by securing a coil 27 and an armature 32 to a magnetic field generation part 20 formed by assembling an upper yoke 21, a lower yoke 22 and magnets 24, 25 is secured to a drive-side mounting surface 5a of the frame 5, and a movable part 32a of the armature 32 and the diaphragm 11 are coupled by a coupler 33.

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Inventors:

NUMATA TAISHI (JP)
SATO KIYOSHI (JP)
AOKI DAIGO (JP)
SATO YUTAKA (JP)
SATO HIDEJI (JP)

Application Number:

PCT/JP2016/051500

Publication Date:

July 27, 2017

Filing Date:

January 20, 2016

Export Citation:

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Assignee:

ALPS ELECTRIC CO LTD (JP)

International Classes:

H04R11/02

Foreign References:

JPS42683B1
JPS4634049B1

Attorney, Agent or Firm:

NOZAKI, Teruo (JP)

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