Speaker device and microphone device

Patent metadata

Field	Value
Publication number	US-10149059-B2
Application number	US-201715626871-A
Country	US
Kind code	B2
Filing date	Jun 19, 2017
Priority date	Sep 12, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A speaker device according to an embodiment of the present disclosure includes a magnetic circuit having a magnetic gap, a ribbon-like diaphragm disposed in a magnetic field in the magnetic gap, a plurality of parallel conductors provided on the diaphragm and extending in a direction orthogonal to a direction of the magnetic field, and a driving unit that supplies driving currents in the same direction to the plurality of parallel conductors. Both end portions of the diaphragm are continuous via a pivoting board disposed so as to bypass the magnetic gap, and connection conductors for spirally connecting the plurality of parallel conductors are provided on the pivoting board.

First claim

What is claimed is:

1. A speaker device comprising:
a magnetic circuit having a magnetic gap;
a ribbon-like diaphragm disposed in a magnetic field in the magnetic gap;
a plurality of parallel conductors provided on the diaphragm, extending in a direction orthogonal to a direction of the magnetic field, and aligned along the direction of the magnetic field; and
a driving unit that supplies a driving current to the plurality of parallel conductors,
wherein a connection conductor is provided that electrically connects one end of one of the parallel conductors to an opposite end of another parallel conductor such that driving currents in the same direction flow through the plurality of parallel conductors, and that is disposed so as to bypass the magnetic gap.

2. The speaker device according to claim 1 ,
wherein both end portions of the diaphragm are continuous via a board disposed so as to bypass the magnetic gap, and the connection conductor is provided on the board so as to spirally connect the plurality of parallel conductors.

3. The speaker device according to claim 1 ,
wherein the plurality of parallel conductors is provided on each of front and back surfaces of the diaphragm.

4. The speaker device according to claim 3 ,
wherein a gap region existing between the plurality of parallel conductors provided on any one surface of the diaphragm overlaps, in a plane, the parallel conductor provided on the other surface of the diaphragm.

5. The speaker device according to claim 2 ,
wherein the connection conductors are provided on both front and back surfaces of the board, and the connection conductors are electrically connected via through holes.

6. The speaker device according to claim 2 ,
wherein the connection conductor is at least partially formed wider than the parallel conductor.

7. The speaker device according to claim 2 ,
wherein the connection conductor is at least partially formed thicker than the parallel conductor.

8. The speaker device according to claim 2 ,
wherein the board extends from one end portion of the diaphragm to an other end portion of the diaphragm through a bottom surface of the magnetic circuit.

9. The speaker device according to claim 8 ,
wherein the board is at least partially formed wider than the diaphragm.

10. The speaker device according to claim 8 ,
wherein the diaphragm and the board include a resin film continuous in a band shape, and the parallel conductor and the connection conductor include a metal pattern formed on the resin film.

11. A microphone device comprising:
a magnetic circuit having a magnetic gap;
a ribbon-like diaphragm disposed in a magnetic field in the magnetic gap;
a plurality of parallel conductors provided on the diaphragm, extending in a direction orthogonal to a direction of the magnetic field, and aligned along the direction of the magnetic field; and
a detection unit that detects an electromotive force generated between the plurality of parallel conductors by vibration of the diaphragm,
wherein a connection conductor is provided that electrically connects one end of one of the parallel conductors to an opposite end of another parallel conductor such that detection currents in the same direction flow through the plurality of parallel conductors, and that is disposed so as to bypass the magnetic gap.

Assignees

• Alpine Electronics Inc

Inventors

• Maeda Yoshikazu

Classifications

• H04R9/08

  Microphones · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R9/048 Primary

  of the ribbon type · CPC title

• H04R9/025

  Magnetic circuit · CPC title