Film speaker

Patent metadata

Field	Value
Publication number	US-10051378-B2
Application number	US-201715415931-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Oct 26, 2016
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A film speaker includes a metal foil, a diaphragm apart from and opposed to the metal foil, an elastomer for supporting the diaphragm, and a voice coil disposed on the metal foil for producing magnetic field. The diaphragm includes a polymer magnetic material layer and a metal foil reinforcing layer attached to a surface of the polymer magnetic material layer for interacting with the magnetic field produced by the voice coil so as to drive the diaphragm to vibrate for generating sound.

First claim

What is claimed is:

1. A film speaker, including:
a metal foil;
a diaphragm apart from and opposed to the metal foil;
an elastomer for supporting the diaphragm, the elastomer disposed between the metal foil and the diaphragm along a vibration direction of the diaphragm, the elastomer stacked on the metal foil, the diaphragm stacked on the elastomer, an accommodation space formed by the elastomer cooperatively with the diaphragm and the elastomer;
a voice coil arranged in the accommodation space and disposed on the metal foil for producing magnetic field;
wherein
the diaphragm comprises a polymer magnetic material layer and a metal foil reinforcing layer attached to a surface of the polymer magnetic material layer for interacting with the magnetic field produced by the voice coil so as to drive the diaphragm to vibrate for generating sound.

2. The film speaker as described in claim 1 further comprising a supporting plate for carrying the metal foil, the metal foil is disposed on the supporting plate.

3. The film speaker as described in claim 1 , wherein the metal foil has a plurality of damping holes.

4. The film speaker as described in claim 1 , wherein the metal foil is an iron foil.

5. The film speaker as described in claim 1 , wherein the metal foil reinforcing layer is an iron foil reinforcing layer.

6. The film speaker as described in claim 5 , wherein the metal foil reinforcing layer has a thickness ranged between 0.01˜0.2mm.

7. The film speaker as described in claim 1 , wherein the magnetic material layer includes a plurality of magnetic gaps, and a projection of the voice coil along a vibration direction of the diaphragm on the magnetic material layer is located in the magnetic gaps.

8. The film speaker as described in claim 4 , wherein the voice coil is fixed to the metal foil by bonding.

9. The film speaker as described in claim 1 , wherein the polymer magnetic material layer is located between the voice coil and the metal foil reinforcing layer.

10. The film speaker as described in claim 1 , wherein, a cross section of the elastomer is a rectangle, a C shape, an S shape, an H shape, or a thinner waist.

Assignees

• Hui Yao
• Li Shujuan
• Aac Technologies Pte Ltd

Inventors

• Hui Yao
• Li Shujuan

Classifications

• H04R2307/025

  Diaphragms comprising polymeric materials · CPC title

• H04R9/047 Primary

  in which the windings of the moving coil lay in the same plane · CPC title

• H04R9/025

  Magnetic circuit · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R2307/027

  Diaphragms comprising metallic materials · CPC title