Loudspeaker diaphragm

• US 9,955,266 B2
• Filed: 09/09/2014
• Issued: 04/24/2018
• Est. Priority Date: 05/26/2014
• Status: Active Grant

• Current Assignee: Goertek Incorporated
• Original Assignee: Goertek Incorporated
• Inventors: Liu, Xuelu, Yang, Jianbin, Wang, Ting, Jiang, Chao
• Primary Examiner(s): Eason, Matthew
• Assistant Examiner(s): ROBINSON, RYAN C
• Application Number:
  US15/313,937
• Publication Number:
  US 20170188155A1
• Time in Patent Office: 1,323 Days
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 7/06 comprising a plurality of sections or layers
• CPC Class Codes: H04R 7/125 comprising a plurality of superposed layers in contact
• CPC Class Codes: H04R 7/127 dome-shaped
• CPC Class Codes: H04R 9/06 Loudspeakers

Abstract

The present application provides a loudspeaker diaphragm, comprising a first surface layer, a middle layer and a second surface layer, that are in a stacked structure. The loudspeaker diaphragm is characterized in that: at least one surface layer of the first surface layer and the second surface layer has a composite structure which is composed of a base layer and a reinforcing layer, and the other surface layer comprises a base layer; the base layer is a poly(ether-ether-ketone) layer, a polyarylester layer, a polyethylene terephthalate layer, a polyetherimide layer or a composite structure composed of any two of the above layers, and the reinforcing layer is a thermoplastic polyurethane elastomer layer or a thermoplastic elastomer layer. The loudspeaker diaphragm can reduce diaphragm breakage after power test is performed on a loudspeaker product, improve substrate toughness and improve acoustical property of the loudspeaker.

Claims

1. A loudspeaker diaphragm, comprising a first surface layer, an intermediate layer and a second surface layer in a lamination structure, wherein

at least one surface layer of the first surface layer and the second surface layer is a composite layer composed of a base layer and a reinforcing layer, and the other surface layer comprises at least a base layer, and

the base layer is any one selected from a group consisting of a polyetheretherketone layer, a polyarylester layer, a polyethylene terephthalate layer and a polyetherimide layer, or a composite layer composed of any two selected from the group;

the reinforcing layer is a thermoplastic polyurethane elastomer layer or a thermoplastic elastomer layer.

2. The loudspeaker diaphragm according to claim 1, wherein one surface layer of the first surface layer and the second surface layer is coupled to a voice coil of a loudspeaker.

3. The loudspeaker diaphragm according to claim 2, wherein the one surface layer coupled to the voice coil of the loudspeaker is coupled to the voice coil through its base layer.

4. The loudspeaker diaphragm according to claim 1, wherein when the other surface layer only comprises the base layer, a lamination order of the loudspeaker diaphragm is as follows:

the base layer, the reinforcing layer, the intermediate layer, the base layer;

the reinforcing layer, the base layer, the intermediate layer, the base layer;

the base layer, the intermediate layer, the base layer, the reinforcing layer;

or

the base layer, the intermediate layer, the reinforcing layer, the base layer.

5. The loudspeaker diaphragm according to claim 1, wherein each of the first surface layer and the second surface layer is the composite layer composed of the base layer and the reinforcing layer.

6. The loudspeaker diaphragm according to claim 5, wherein a lamination order of the loudspeaker diaphragm is as follows:

the base layer, the reinforcing layer, the intermediate layer, the base layer, the reinforcing layer;

the base layer, the reinforcing layer, the intermediate layer, the reinforcing layer, the base layer;

the reinforcing layer, the base layer, the intermediate layer, the base layer, the reinforcing layer;

or

the reinforcing layer, the base layer, the intermediate layer, the reinforcing layer, the base layer.

7. The loudspeaker diaphragm according to claim 1, wherein

the intermediate layer is an acrylic acid adhesive layer.

8. The loudspeaker diaphragm according to claim 1, wherein

when the surface layer is the composite layer composed of the base layer and the reinforcing layer, the base layer bonds with the reinforcing layer by thermal compounding.

9. The loudspeaker diaphragm according to claim 1, wherein a thickness of each of the first surface layer and the second surface layer is 2˜

30 μ

m.

10. The loudspeaker diaphragm according to claim 1, wherein a thickness of the reinforcing layer is 5˜

40 μ

m, and a hardness of the reinforcing layer is 60˜

95 A Shore hardness.