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:
Mar. 16, 2021
Filed:
Oct. 30, 2017
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Naomichi Yanagidate, Chiyoda-ku, JP;
Tsuyoshi Nakada, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A speaker includes a main-cone and a sub-cone. Linear thin portions configured to reduce a plate thickness of the sub-cone are formed on a region containing at least any one of an outer side and an inner side of the sub-cone. Each of the linear thin portions has both of a component in a radial direction and a component in a circumferential direction of the sub-cone. First and second linear thin portions cross each other at an intersection. With this configuration, stiffness of the whole sub-cone is reduced to enhance a divided vibration of the sub-cone. In particular, a vibrational displacement of an outer peripheral portion of the sub-cone, from which a sound is mainly radiated, is increased.