Film speaker

Patent metadata

Field	Value
Publication number	US-10356529-B2
Application number	US-201715415906-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Oct 26, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

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 substrate layer and a magnetic material layer attached to a surface of the substrate layer for interacting with a 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 and located between the diaphragm and the metal foil 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 metal foil;
a voice coil disposed on the metal foil for producing magnetic field;
wherein
the diaphragm comprises a substrate layer and a magnetic material layer attached to a surface of the substrate layer for interacting with the magnetic field produced by the voice coil so as to drive the diaphragm to vibrate for generating sound, a cross section of the elastomer is a C shape, an S shape, or an H shape.

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 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.

6. The film speaker as described in claim 5 , wherein the voice coil is a flat coil.

7. The film speaker as described in claim 6 , wherein the voice coil is fixed to the metal foil by bonding.

Assignees

• Aac Technologies Pte Ltd

Inventors

• Hui Yao
• Li Shujuan

Classifications

• H04R9/046

  Construction · CPC title

• H04R9/047

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

• H04R7/06

  comprising a plurality of sections or layers · CPC title

• H04R2307/025

  Diaphragms comprising polymeric materials · CPC title

• H04R7/18

  at the periphery · CPC title