Speaker diaphragm and speaker

Patent metadata

Field	Value
Publication number	US-11962986-B2
Application number	US-201817252606-A
Country	US
Kind code	B2
Filing date	Oct 13, 2018
Priority date	Jun 15, 2018
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

The present disclosure provides a speaker diaphragm and a speaker. The diaphragm includes a thermoplastic polyester elastomer film layer, a thermoplastic polyester elastomer being a copolymer composed of a hard segment A of polyester and a soft segment B of polyether or aliphatic polyester, wherein the thermoplastic polyester elastomer film layer has Young's modulus of 1-1000 MPa, with an elastic recovery rate after 10% strain being greater than or equal to 80%. The speaker diaphragm has a good stiffness, a good damping performance and a good resilience.

First claim

The invention claimed is:

1. A speaker diaphragm, comprising a thermoplastic polyester elastomer film layer comprising a thermoplastic polyester elastomer including a hard segment A comprising polyester and a soft segment B comprising polyether or aliphatic polyester, wherein the thermoplastic polyester elastomer film layer has Young's modulus of 1 MPa-1000 MPa, with an elastic recovery rate after 10% strain being greater than or equal to 80%.

2. The speaker diaphragm according to claim 1 , wherein the thermoplastic polyester elastomer film layer has a Young's modulus of 2 MPa-700 MPa.

3. The speaker diaphragm according to claim 1 , the thermoplastic polyester elastomer film layer has a loss factor greater than or equal to 0.015.

4. The speaker diaphragm according to claim 1 , wherein the thermoplastic polyester elastomer film layer has a percentage of breaking elongation greater than or equal to 300%.

5. The speaker diaphragm according to claim 1 , wherein the thermoplastic polyester elastomer film layer has a glass transition temperature of −90° C.-0° C.

6. The speaker diaphragm according to claim 1 , wherein the soft segment B includes a polyether or aliphatic polyester selected from the group consisting of aliphatic polyester, polytetrahydrofuran ether, polyphenylene ether, and polyethylene oxide; and a mass percentage of the hard segment A of polyester is 10-95%, and a relative molecular mass of the soft segment B of polyether or aliphatic polyester is 600-6000.

7. The speaker diaphragm according to claim 1 , wherein the hard segment A of polyester selected from the group consisting of a polymer of dibasic acid and dihydric alcohol, wherein the dibasic acid is selected from the group consisting of terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid and biphenyldicarboxylic acid, and the dihydric alcohol is selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, pentanediol, and hexylene glycol.

8. The speaker diaphragm according to claim 1 , wherein the hard segment A of polyester comprises a material that can be crystallized, an average polymerization degree of the hard segment A of polyester material is greater than or equal to 2, and the hard segment A of polyester comprises a material having a melting temperature greater than or equal to 150° C.

9. The speaker diaphragm according to claim 1 , comprising two surface layers compounded together and at least one intermediate layer located between the two surface layers, wherein at least one of the surface layers is the thermoplastic polyester elastomer film layer, and at least one of the intermediate layers is an adhesive layer.

10. The speaker diaphragm according to claim 9 , wherein the speaker diaphragm comprises a three-layer structure, including one intermediate layer, and two surface layers being the thermoplastic polyester elastomer film layers.

11. The speaker diaphragm according to claim 9 , wherein the speaker diaphragm comprises two intermediate layers, the two surface layers being the thermoplastic polyester elastomer film layers, and the two intermediate layers being adhesive layers made from different materials.

12. The speaker diaphragm according to claim 9 , wherein the speaker diaphragm comprises three intermediate layers, wherein a first and a second of the intermediate layers comprise adhesive layers and a third of the intermediate layers comprises the thermoplastic polyester elastomer film layer, and wherein the thermoplastic polyester elastomer film layer is located between the two adhesive layers.

13. A speaker, comprising a vibration system and a magnetic circuit system cooperating with the vibration system, wherein the vibration system comprises the speaker diaphragm according to claim 1 .

14. The speaker diaphragm according to claim 9 , wherein the speaker diaphragm comprises three intermediate layers, wherein the three intermediate layers comprise adhesive layers.

Assignees

• Goertek Inc

Inventors

• Wang Ting
• Zhao Guodong
• Zhu Jie
• Li Chun
• Liu Chunfa

Classifications

• H04R7/125 Primary

  comprising a plurality of superposed layers in contact · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/36

  comprising polyesters · CPC title

• H04R9/025

  Magnetic circuit · CPC title