Title:
ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2024/057596
Kind Code:
A1
Abstract:
This electroacoustic transducer (100) comprises a magnetic circuit (110), a coil (120), an oscillation plate (130), a frame (140), and an edge (150). The edge (150) includes: an up-roll portion (151) which curves to protrude toward a front side, which is one side of an oscillation direction of the oscillation plate (130); and a down-roll portion (152) which is connected concentrically to the up-roll portion (151) and which curves so as to protrude toward a rear side, which is the other side of the oscillation direction. The up-roll portion (151) includes a first bulging line (161) which protrudes toward the rear side and the down-roll portion (152) includes a second bulging line (162) which protrudes toward the front side. The inclination of the first bulging line (161) and the inclination of the second bulging line (162) are the same when viewed from the front side.
Inventors:
NISHIDA MASASHI
KIYAMA IPPEI
KIYAMA IPPEI
Application Number:
PCT/JP2023/014619
Publication Date:
March 21, 2024
Filing Date:
April 10, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H04R7/20; H04R9/02
Domestic Patent References:
| WO2019021669A1 | 2019-01-31 |
Foreign References:
| JP2021044685A | 2021-03-18 | |||
| JPS5927694U | 1984-02-21 |
Attorney, Agent or Firm:
NII, Hiromori et al. (JP)
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