Title:
ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2023/210065
Kind Code:
A1
Abstract:
This electroacoustic transducer 100 has a diaphragm 10 and a magnetic circuit part 20. The magnetic circuit part 20 includes a permanent magnet 23 that is magnetized in the thickness direction, a pole piece 25 that is magnetically connected to one surface of the permanent magnet 23 in the thickness direction, and a yoke body 21 that includes a bottom portion 21a on which the permanent magnet 23 is disposed, and a peripheral wall portion 21b that extends from the periphery of the bottom portion 21a in a direction away from the bottom portion 21a and that is magnetically connected to the other surface of the permanent magnet 23 in the thickness direction on the bottom portion 21a. At least one of the pole piece 25 and the bottom portion 21a of the yoke body 21 is a laminate in which a plurality of magnetic metal plates are stacked in the thickness direction of the permanent magnet with electrical insulation between each plate.
Inventors:
OZAWA HIROMICHI (JP)
FUKUSHIMA SHIWAKU NONOMI (JP)
FUKUSHIMA SHIWAKU NONOMI (JP)
Application Number:
PCT/JP2023/000375
Publication Date:
November 02, 2023
Filing Date:
January 11, 2023
Export Citation:
Assignee:
AUDIO TECHNICA KK (JP)
International Classes:
H04R9/02
Foreign References:
| JPS5234212B2 | 1977-09-02 | |||
| JP2010010791A | 2010-01-14 | |||
| JPH02268600A | 1990-11-02 |
Attorney, Agent or Firm:
IZUMI Michihiro (JP)
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