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:
May. 06, 2025
Filed:
Mar. 10, 2023
Denso Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Mirise Technologies Corporation, Nisshin, JP;
Nisshinbo Micro Devices Inc., Tokyo, JP;
Tomoya Joke, Nisshin, JP;
Tetsuya Enomoto, Nisshin, JP;
Hideo Yamada, Nisshin, JP;
Shuji Katakami, Tokyo, JP;
Takashi Kakefuda, Tokyo, JP;
Takahide Usui, Tokyo, JP;
DENSO CORPORATION, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
MIRISE Technologies Corporation, Nisshin, JP;
Nisshinbo Micro Devices Inc., Tokyo, JP;
Abstract
An electroacoustic transducer includes a vibrating portion, a slit and an elastic film. The vibrating portion has a fixed end portion and a free end portion, and extends as a cantilever from the fixed end portion toward the free end portion along an extending direction orthogonal to a directivity axis to vibrate in a manner that the free end portion moves along the directivity axis. The slit is formed at two ends of the vibrating portion in a width direction orthogonal to the directivity axis and orthogonal to the extending direction. The elastic film is provided to close the slit in an axial direction that is aligned with the directivity axis. The slit includes a wide portion provided on a free end side and a narrow portion narrower than the wide portion. The elastic film is provided to close the wide portion while not closing the narrow portion.