Speaker diaphragm and speaker structure

• US 20060266577A1
• Filed: 02/16/2006
• Published: 11/30/2006
• Est. Priority Date: 05/25/2005
• Status: Active Grant

• Current Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Original Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Inventors: Inoue, Toshihide, Kumo, Hiroyasu
• Granted Patent: US 7,344,001 B2
• Time in Patent Office: Days
• US Class Current: 181/167
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 31/003 for diaphragms or their outer suspension
• CPC Class Codes: H04R 7/10 comprising superposed layers in contact

Abstract

A speaker diaphragm includes a base material impregnated with a thermosetting resin composition. The base material includes a first surface material, a core material, and a second surface material in the stated order; the first surface material and the second surface material are each formed of a woven fabric or a non-woven fabric; and the core material is formed of a woven fabric or a non-woven fabric each including hollow fine particles.

Claims

1. A speaker diaphragm comprising a base material impregnated with a thermosetting resin composition, wherein:

the base material comprises a first surface material, a core material, and a second surface material in the stated order;

the first surface material and the second surface material are each formed of one of a woven fabric and a non-woven fabric; and

the core material is formed of one of a woven fabric and a non-woven fabric each including hollow fine particles.

2. A speaker diaphragm according to claim 1, wherein one of the woven fabric and the non-woven fabric forming the core material is formed of a polyester fiber.

3. A speaker diaphragm according to claim 1, wherein the core material is formed of one of a woven fabric and a non-woven fabric each having the hollow fine particles dispersed in a middle part of the core material in a thickness direction.

4. A speaker diaphragm according to claim 3, wherein the core material has through-holes.

5. A speaker diaphragm according to claim 1, wherein the core material is formed of one of a woven fabric and a non-woven fabric each including a plurality of cells formed with gaps between one another, and each cell including the hollow fine particles.

6. A speaker diaphragm according to claim 5, wherein the plurality of cells each have at least one shape selected from the group consisting of a spherical shape, a cylindrical shape, and a polygonal columnar shape.

7. A speaker diaphragm according to claim 1, wherein the hollow fine particles each have a particle size of 15 to 90 μ

m.

8. A speaker diaphragm according to claim 1, wherein the hollow fine particles each have a density of 0.03 to 0.06 g/cm³.

9. A speaker diaphragm according to claim 1, wherein the first surface material and the second surface material are each formed of one of a woven fabric and a non-woven fabric of a fiber selected from the group consisting of a high-elastic modulus fiber, a natural fiber, and a regenerated fiber.

10. A speaker diaphragm according to claim 9, wherein the woven fabric has a surface density of 100 to 300 g/m².

11. A speaker diaphragm according to claim 9, wherein the non-woven fabric has a surface density of 30 to 150 g/m².

12. A speaker diaphragm according to claim 9, wherein the high-elastic modulus fiber comprises at least one fiber selected from the group consisting of a carbon fiber, a polyester fiber, and an aramid fiber.

13. A speaker diaphragm according to claim 12, wherein the carbon fiber has a filament number of 1,000 to 3,000.

14. A speaker diaphragm according to claim 1, wherein the thermosetting resin composition comprises an unsaturated polyester resin.

15. A speaker diaphragm according to claim 14, wherein the base material further comprises an intermediate layer between the core material, and at least one of the first surface material and the second surface material.

16. A speaker diaphragm according to claim 15, wherein the intermediate layer is formed of one of a woven fabric and a non-woven fabric of one of a high-elastic modulus fiber and a natural fiber.

19. A speaker comprising the speaker diaphragm according to claim 1.

17. A speaker structure comprising a base material impregnated with a thermosetting resin composition, wherein:

the base material comprises a first surface material, a core material, and a second surface material in the stated order;

the first surface material and the second surface material are each formed of one of a woven fabric and a non-woven fabric; and

the core material is formed of one of a woven fabric and a non-woven fabric each including hollow fine particles.

18. A speaker structure according to claim 17, which is used for one selected from the group consisting of a speaker frame, an enclosure, and a stand.

20. A speaker comprising the speaker structure according to claim 17.