Title:
SOUND PRODUCING DEVICE
Document Type and Number:
Japanese Patent JP2019092113
Kind Code:
A
Abstract:
To provide a sound producing device capable of being downsized while securing stability of total harmonic distortion.SOLUTION: The sound producing device includes: a diaphragm; an armature formed of a magnetic material; a pair of opposing magnets sandwiching the armature and forming a predetermined interval; a yoke supporting the pair of magnets; a coil; and a transmitter for transmitting a vibration of the armature to the diaphragm. The yoke includes: a first yoke for defining an interval between the pair of magnets and holding the pair of magnets so as to protrude to the outside; and a second yoke in which a housing space for receiving the magnet protruding from the first yoke is formed. The housing space of the second yoke is formed to be larger than the pair of magnets in the interval direction of the pair of magnets.SELECTED DRAWING: Figure 4
Inventors:
NUMATA DAISHI
KOMIYA SHUSEI
TSUCHIYA AKIHIRO
NAKAJIMA TAKANORI
AOKI DAIGO
KOMIYA SHUSEI
TSUCHIYA AKIHIRO
NAKAJIMA TAKANORI
AOKI DAIGO
Application Number:
JP2017221089A
Publication Date:
June 13, 2019
Filing Date:
November 16, 2017
Export Citation:
Assignee:
ALPSALPINE CO LTD
International Classes:
H04R11/02
Attorney, Agent or Firm:
Katsuyuki Okubo
野▲崎▼ 照夫
Masahiro Matsushita
野▲崎▼ 照夫
Masahiro Matsushita