Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LOUDSPEAKER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/130530
Kind Code:
A1
Abstract:
[Problem] The present invention addresses the problem of reproducing high-quality sounds especially in a low-sound range by means of a loudspeaker device. [Solution] A supporting frame 25, a drive magnet 17, and a pole piece 19 are housed in a yoke frame 15. The supporting frame 25 that extends to the outer side of the yoke frame 15 is provided. A vibrating membrane 29 covering the supporting frame, drive magnet, and pole piece is fixed to the supporting frame 25, and a voice coil 31 is fixed to the vibrating membrane 29. Both-end lead lines 31a of the voice coil 31 are led out from one area P1. In the supporting frame 25, a first communication hole 25d is formed close to the area P1. A second communication hole 23a is formed in the yoke frame 15, drive magnet 17, and pole piece 19. Communication tubes 33, 35, each of which has one end communicating with the inside, and the other end communicating with the outside, are formed in the supporting frame 25.

More Like This:
Inventors:
TANAKA KENTA (JP)
Application Number:
PCT/JP2017/047163
Publication Date:
July 04, 2019
Filing Date:
December 28, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOKYO ONKYO CO LTD (JP)
International Classes:
H04R9/04; H04R9/02
Domestic Patent References:
WO2011114688A12011-09-22
WO2016170595A12016-10-27
Foreign References:
JPS55165568U1980-11-28
JP2006173998A2006-06-29
JP2013251660A2013-12-12
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
Download PDF: