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Title:
SPEAKER DIAPHRAGM AND SPEAKER DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/142754
Kind Code:
A1
Abstract:
A speaker device provided with: a magnetic circuit comprising an annularly formed magnet, a yoke which has a base surface part and a center pole part protruding from the base surface part, the center pole part being disposed while being inserted into a central part of the magnet, and a plate which is annularly formed and disposed on an outer peripheral side of the center pole part of the yoke while being attached to the magnet; a coil bobbin which is cylindrically formed and is displaceable in the axial direction of the center pole part while part thereof is fitted onto the center pole part of the yoke; a voice coil which is wound around an outer peripheral surface of the coil bobbin, and at least part of which is disposed in a magnetic gap formed between the plate and the center pole part of the yoke; and a diaphragm which is connected to the coil bobbin and is caused to vibrate in conjunction with the displacement of the coil bobbin, wherein a first air passage path leading from the back surface side of the diaphragm to a lower surface of the magnetic circuit, and a second air passage path formed in the lower surface of the magnetic circuit and connecting the first air passage path and a side of the magnetic circuit are formed.

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Inventors:
TAGAMI TAKAHISA (JP)
IKEDA EMIKO (JP)
SAKAI HARUKA (JP)
Application Number:
PCT/JP2017/043580
Publication Date:
August 09, 2018
Filing Date:
December 05, 2017
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
H04R7/10; H04R1/00; H04R1/02; H04R9/02
Domestic Patent References:
WO2015115191A12015-08-06
WO2013137362A12013-09-19
Foreign References:
JPS5179337U1976-06-23
JP2005005934A2005-01-06
JP3187354U2013-11-21
US6868165B12005-03-15
JP2001231097A2001-08-24
JP2007251516A2007-09-27
JPS57125097U1982-08-04
JP2016129367A2016-07-14
Attorney, Agent or Firm:
SUGIURA, Masatomo et al. (JP)
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