Electroacoustic transducer, method of manufacturing electroacoustic transducer, and electroacoustic transducing device

Patent metadata

Field	Value
Publication number	US-10506349-B2
Application number	US-201815895184-A
Country	US
Kind code	B2
Filing date	Feb 13, 2018
Priority date	Mar 7, 2017
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

Provided are an electroacoustic transducer in which deterioration and variation in frequency characteristics are suppressed, a method of manufacturing an electroacoustic transducer, and an electroacoustic transducing device. An electroacoustic transducer 3 includes a diaphragm 34, a housing 33 accommodating the diaphragm, an elastic member 37 being accommodated in the housing, and a pressing member 31 pressing the elastic member. The elastic member is annular. The diaphragm includes a dome portions 341 and 342, and an attaching portion 343 disposed on an outer rim of the dome portion. The housing includes a stepped portion 331. The stepped portion includes a mounting surface 331a on which the attaching portion is mounted, and a wall surface 331b extending in a direction separating from the mounting surface. The elastic member 37 has an inner circumference, and an outer circumference. The pressing member presses the elastic member against the attaching portion. The outer circumference of the elastic member stretches to the wall surface. The inner circumference of the elastic member stretches to a border 344 between the dome portion and the attaching portion.

First claim

The invention claimed is:

1. An electroacoustic transducer comprising:
a diaphragm;
a housing accommodating the diaphragm;
an elastic member being accommodated in the housing; and
a pressing member pressing the elastic member, wherein
the elastic member is annular,
the diaphragm comprises
a dome portion, and
an attaching portion disposed on an outer rim of the dome portion,
the housing comprises
a stepped portion,
the stepped portion comprises
a mounting surface on which the attaching portion is mounted, and
a wall surface extending in a direction separating from the mounting surface,
the elastic member has
an inner circumference,
an outer circumference, and
a rear surface having an inner circumferential end,
the pressing member presses the elastic member against the attaching portion,
the outer circumference of the elastic member stretches to the wall surface,
the inner circumference of the elastic member stretches to a border between the dome portion and the attaching portion, and
the inner circumferential end is positioned at the border between the dome portion and the attaching portion.

2. The electroacoustic transducer according to claim 1 , wherein
at least a portion of the outer circumference of the elastic member comes into contact with the wall surface, and
at least a portion of the inner circumference of the elastic member is positioned at a border between the dome portion and the attaching portion.

3. The electroacoustic transducer according to claim 1 , wherein
the pressing member includes
a restricting portion, and
at least a portion of the inner circumference of the elastic member comes into contact with the restricting portion.

4. The electroacoustic transducer according to claim 1 , wherein
the elastic member includes
a projection portion, and
at least a portion of an outer circumference of the projection portion comes into contact with the wall surface.

5. The electroacoustic transducer according to claim 1 , wherein
the elastic member includes
a projection portion, and
at least a portion of an inner circumference of the projection portion is positioned at the border.

6. The electroacoustic transducer according to claim 1 , wherein
the pressing member includes
a pressing projection portion, and
the pressing projection portion presses the elastic member.

7. The electroacoustic transducer according to claim 6 , wherein
the pressing projection portion is annular, and
an amount of projection of an inner circumference of the pressing projection portion is smaller than an amount of projection of an outer circumference of the pressing projection portion.

8. The electroacoustic transducer according to claim 1 , wherein
the elastic member includes
a to-be-pressed surface is pressed by the pressing member, and
a portion of the to-be-pressed surface comes into contact with the pressing member.

9. The electroacoustic transducer according to claim 1 , wherein
the pressing member includes
a pressing surface presses the elastic member, and
a portion of the pressing surface comes into contact with the elastic member.

10. An electroacoustic transducing device comprising:
an electroacoustic transducer, wherein
the electroacoustic transducer is the electroacoustic transducer according to claim 1 .

11. A method of manufacturing an electroacoustic transducer,
the electroacoustic transducer comprises:
a diaphragm vibrates based on a sound wave,
a housing accommodates the diaphragm,
an annular elastic member is accommodated in the housing, and
a pressing member presses the elastic member,
the diaphragm comprises
a dome portion, and
an attaching portion disposed on an outer rim of the dome portion,
the housing comprises
a stepped portion,
the stepped portion comprises
a mounting surface on which the attaching portion is mounted, and
a wall surface extending in a direction separating from the mounting surface,
the elastic member has
an inner circumference,
an outer circumference, and
a rear surface having an inner circumferential end,
the method of manufacturing an electroacoustic transducer comprising:
a first mounting process in which the attaching portion is mounted on the mounting surface;
a second mounting process in which the elastic member is mounted on the attaching portion;
a pressing process in which the elastic member is pressed by the pressing member, wherein
in the pressing process,
the outer circumference of the elastic member stretches to the wall surface, and
the inner circumference of the elastic member stretches to a border between the dome portion and the attaching portion, and
the inner circumferential end is positioned at the border between the dome portion and the attaching portion.

12. The method of manufacturing an electroacoustic transducer according to claim 11 , wherein
in the pressing process,
at least a portion of an outer circumference of the elastic member comes into contact with the wall surface, and
at least a portion of an inner circumference of the elastic member is positioned at a border between the dome portion and the attaching portion.

13. The method of manufacturing an electroacoustic transducer according to claim 12 , wherein
the mounting surface is annular, and
in the pressing process,
a border between the dome portion and the attaching portion is positioned at an inner circumferential end of the mounting surface.

14. The electroacoustic transducer according to claim 1 , wherein
the attaching portion has a ring shape,
the stepped portion has a ring shape,
the attaching portion has an outer diameter which is smaller than an inner diameter of the wall surface, and
the elastic member comes into contact with the mounting surface of the stepped portion.

15. The electroacoustic transducer according to claim 1 , wherein
the rear surface comes into contact with the mounting surface and the wall surface of the stepped portion.

Assignees

• Audio Technica Kk

Inventors

• Komatsu Maiko

Classifications

• H04R31/003

  for diaphragms or their outer suspension · CPC title

• H04R1/08

  Mouthpieces; {Microphones;} Attachments therefor · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H04R9/08 Primary

  Microphones · CPC title

• H04R7/22

  Clamping rim of diaphragm or cone against seating · CPC title