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:
Jan. 20, 2026
Filed:
Apr. 04, 2024
Applicant:
Panasonic Automotive Systems Co., Ltd., Kanagawa, JP;
Inventors:
Assignee:
PANASONIC AUTOMOTIVE SYSTEMS CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 9/04 (2006.01); H04R 1/06 (2006.01); H04R 7/12 (2006.01); H04R 9/02 (2006.01);
U.S. Cl.
CPC ...
H04R 9/046 (2013.01); H04R 7/12 (2013.01); H04R 9/025 (2013.01); H04R 9/045 (2013.01); H04R 2400/11 (2013.01);
Abstract
An electroacoustic conversion device including a diaphragm, an inner voice coil attached to the diaphragm, an outer bobbin disposed in a periphery of the inner voice coil to surround the inner voice coil, an outer voice coil attached to the outer bobbin; a magnetic circuit, and a frame that holds the diaphragm and the magnetic circuit. The outer bobbin includes a plurality of wiring portions in which a pair of inner signal lines are arranged penetrating through, the plurality of wiring portions being hole shaped or notch shaped, the pair of inner signal lines being signal lines of the inner voice coil.