Microphone and microphone casing

Patent metadata

Field	Value
Publication number	US-2016192045-A1
Application number	US-201514876179-A
Country	US
Kind code	A1
Filing date	Oct 6, 2015
Priority date	Dec 25, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A microphone includes a microphone unit having a diaphragm vibrating in response to sound. The microphone unit converts the sound into an electrical signal. A cylindrical casing contains the microphone unit. A metal mesh strip rounded along the inner surface of the casing is attached to the inner surface of the main wall of the casing so as to cover openings. The rounded metal mesh strip has a spring portion generating spring force to expand the metal mesh strip against the inner surface of the casing to provide electrostatic shielding.

First claim

1 . A microphone comprising:
a microphone unit comprising a diaphragm vibrating in response to sound, the microphone unit converting the sound into an electrical signal; a cylindrical casing containing the microphone unit having openings in a main wall of the casing; and a metal mesh strip rounded along and attached to the inner surface of the main wall of the cylindrical casing so as to cover the openings, the rounded metal mesh strip having a spring portion generating spring force to expand the metal mesh strip aginst the main wall of the casing to provide electrostatic shielding.

2 . The microphone of claim 1 , wherein the length of a long side of the metal mesh strip is longer than the circumferential length of the inner surface of the cylindrical casing.

3 . The microphone of claim 1 , wherein the spring portion protrudes inwardly.

4 . The microphone of claim 1 , wherein the spring portion protrudes inwardly along a short side of the metal mesh strip.

5 . The microphone of claim 1 , wherein the metal mesh strip covers a pathway to send the electrical signal from the microphone unit in the cylindrical casing.

6 . The microphone of claim 1 , wherein two ends of the metal mesh strip are in contact with each other because of spring force of the spring portion.

7 . The microphone of claim 1 , wherein two ends of the metal mesh strip are separated in the longitudinal direction before attachment to the cylindrical casing.

8 . The microphone of claim 1 , wherein the spring portion is a semi-cylindrical segment.

9 . A microphone casing containing a microphone unit comprising a diaphragm vibrating in response to sound, the microphone unit converting the sound into an electrical signal, wherein:
the microphone casing is a cylindrical casing; a main wall of the casing has openings; and the microphone casing comprises a metal mesh strip rounded along and attached to the inner surface of the main wall of the cylindrical casing so as to cover the openings, the rounded metal mesh strip having a spring portion generating spring force to expand the metal mesh strip against the main wall of the casing to provide electrostatic shielding.

10 . The microphone casing of claim 9 , wherein the length of a long side of the metal mesh strip is longer than the circumferential length of the inner surface of the cylindrical casing.

11 . The microphone casing of claim 9 , wherein the spring portion protrudes inwardly.

12 . The microphone casing of claim 9 , wherein the spring portion protrudes inwardly along a short side of the metal mesh strip.

13 . The microphone casing of claim 9 , wherein the metal mesh strip covers a pathway to send the electrical signal from the microphone unit in the cylindrical casing.

14 . The microphone casing of claim 9 , wherein two ends of the metal mesh strip are in contact with each other because of spring force of the spring portion.

15 . The microphone casing of claim 9 , wherein two ends of the metal mesh strip are separated in the longitudinal direction before attachment to the cylindrical casing.

16 . The microphone casing of claim 9 , wherein the spring portion is a semi-cylindrical segment.

Assignees

• Akino Hiroshi
• Audio Technica Kk

Inventors

• Akino Hiroshi

Classifications

• H04M1/035

  Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities · CPC title

• H04R2410/00

  Microphones · CPC title

• H04R1/04

  Structural association of microphone with electric circuitry therefor (in electric hearing aids H04R25/00) · CPC title

• H04R1/02 Primary

  Casings; Cabinets {; Supports therefor;} Mountings therein (H04R1/28 takes precedence {; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075}) · CPC title

• H04R2410/03

  Reduction of intrinsic noise in microphones · CPC title