The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
Oct. 17, 2022
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Satoshi Itoh, Kyoto, JP;
Mitsukazu Kuze, Osaka, JP;
Shinya Kagawa, Osaka, JP;
Kiyohisa Hattori, Osaka, JP;
Assignee:
PANASONIC AUTOMOTIVE SYSTEMS CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/24 (2006.01); H04R 3/00 (2006.01); H04R 7/12 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01);
U.S. Cl.
CPC ...
H04R 1/24 (2013.01); H04R 3/00 (2013.01); H04R 7/12 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H04R 9/06 (2013.01); H04R 2400/11 (2013.01);
Abstract
An electroacoustic conversion device includes a vibration plate, an inner voice coil attached to the vibration plate, an outer voice coil attached to the vibration plate outside the inner voice coil to surround the inner voice coil, a magnet, a yoke, and the frame which holds the vibration plate and the yoke. The magnet includes a wiring portion which is in a form of a through hole or a notch in which inner signal lines for the inner voice coil are provided.