US 12,294,831 B2
Electroacoustic transducer
Tomoya Joke, Nisshin (JP); Tetsuya Enomoto, Nisshin (JP); Hideo Yamada, Nisshin (JP); Shuji Katakami, Tokyo (JP); Takashi Kakefuda, Tokyo (JP); and Takahide Usui, Tokyo (JP)
Assigned to DENSO CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); MIRISE Technologies Corporation, Nisshin (JP); and Nisshinbo Micro Devices Inc., Tokyo (JP)
Filed by DENSO CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); MIRISE Technologies Corporation, Nisshin (JP); and Nisshinbo Micro Devices Inc., Tokyo (JP)
Filed on Mar. 10, 2023, as Appl. No. 18/181,912.
Claims priority of application No. 2022-077145 (JP), filed on May 9, 2022.
Prior Publication US 2023/0362550 A1, Nov. 9, 2023
Int. Cl. H04R 17/00 (2006.01)
CPC H04R 17/00 (2013.01) 11 Claims
OG exemplary drawing
 
1. An electroacoustic transducer comprising:
a vibrating portion having a fixed end portion and a free end portion, and extending as a cantilever from the fixed end portion to the free end portion along an extending direction that is orthogonal to a directivity axis to vibrate in a manner that the free end portion moves along the directivity axis;
a slit provided at two ends of the vibrating portion in a width direction that is orthogonal to the directivity axis and orthogonal to the extending direction; and
an elastic film provided to close the slit in an axial direction aligned with the directivity axis, wherein
the slit includes a wide portion provided on a free end side, and a narrow portion that extends from the wide portion and is narrower than the wide portion, and
the elastic film is provided to close the wide portion while without closing the narrow portion.