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Patent Searching and Data


Title:
SPEAKER, MANUFACTURING METHOD THEREOF, AND DRIVE UNIT THEREOF
Document Type and Number:
WIPO Patent Application WO/2013/047792
Kind Code:
A1
Abstract:
[Problem] To enable a speaker to be made small, light, and thin, and an overall drive current to be reduced without significantly degrading the driving capability. [Solution] This speaker is provided with: a frame member (11); a diaphragm (13); and multiple drive units (10a, 10b, 10c) that have two or more coil members (14) and magnetic members (17) to impart an electromagnetic force to the diaphragm (13). Two or more drive units (10a, etc.) are provided between the frame member (11) and the diaphragm (13), each of said drive units being formed into a single unit comprising either the coil member (14) or the magnetic member (17), or both. The coil members (14) of the drive units (10a, etc.) are attached to the frame member (11), each of said coil members being created by winding a coil wire around a hollow-core spool member for a predetermined number of times, and two or more magnetic members (17) having magnets are attached to the diaphragm (13). Electromagnetic conversion members are assembled with the magnets being aligned such that tip sections of the magnets are respectively contained inside the hollow-core sections of the spool members.

Inventors:
EGUCHI YOSHIKAZU (JP)
Application Number:
PCT/JP2012/075171
Publication Date:
April 04, 2013
Filing Date:
September 28, 2012
Export Citation:
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Assignee:
EGUCHI YOSHIKAZU (JP)
International Classes:
H04R9/06; H04R7/04; H04R9/02; H04R31/00
Foreign References:
JP2000236595A2000-08-29
JPH10327491A1998-12-08
JPS5525286A1980-02-22
JPS6330096U1988-02-27
JPH02257800A1990-10-18
JPS5863299A1983-04-15
JP4981186B12012-07-18
Attorney, Agent or Firm:
YOSHIMURA, SHUNICHI (JP)
Toshikazu Yoshimura (JP)
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Claims: