Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite vibrating diaphragm of sound production device and preparation method thereof and sound production device

A technology of a sounding device and a composite membrane, which is applied in the directions of chemical instruments and methods, diaphragm structures, synthetic resin layered products, etc. The lack of overall resilience and the decline of product reliability can achieve the effect of improving peeling force, excellent resilience and reducing film folding.

Active Publication Date: 2020-11-13
GOERTEK INC
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of implementing the embodiments of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems: (1) The adhesive force between the thermoplastic elastomer layer and the adhesive film layer is not strong enough, resulting in product failure. Reliability declines, and there will be problems of delamination or even membrane rupture after long-term vibration; (2) The overall resilience of the composite diaphragm is lacking, resulting in the diaphragm membrane fracture of the sounding device after large-amplitude vibration or harsh air-tightness tests , subsidence and other risks

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite vibrating diaphragm of sound production device and preparation method thereof and sound production device
  • Composite vibrating diaphragm of sound production device and preparation method thereof and sound production device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] As described in the background art, the composite diaphragm in the prior art includes a thermoplastic elastomer layer and an adhesive film layer. In this composite diaphragm, the bonding force between the thermoplastic elastomer layer and the adhesive film layer is not strong enough. As a result, the reliability of the product is reduced, and there will be problems of delamination or even membrane rupture after long-term vibration; at the same time, the overall resilience of the composite diaphragm is lacking, and there are risks of diaphragm membrane folding and collapse after large amplitude or strict air tightness tests. In order to solve the above technical problems, the present invention provides a composite diaphragm of a sounding device, a preparation method thereof, and a sounding device.

[0045] In a first aspect, a method for preparing a composite diaphragm of a sounding device is provided, the composite diaphragm includes at least one layer of thermoplastic e...

Embodiment 1

[0081] A method for preparing a composite diaphragm of a sounding device, wherein the composite diaphragm is composed of a layer of thermoplastic elastomer and a layer of thermosetting polyurethane rubber;

[0082] The preparation method of the composite diaphragm comprises the following steps:

[0083] A rubber layer is provided, wherein, the preparation method of the rubber layer is: using polyurethane rubber to make a film body through a calendering process, and the film body is an uncrosslinked polyurethane rubber layer;

[0084] Laminating the rubber layer and the thermoplastic elastomer layer to form a composite film;

[0085]The composite film is subjected to molding treatment to form a vibrating membrane, and in the molding treatment, the non-crosslinked polyurethane rubber layer or the semi-crosslinked polyurethane rubber layer is subjected to a crosslinking reaction to form a thermosetting polyurethane rubber layer.

[0086] The forming process is air pressure formi...

Embodiment 2

[0090] A composite vibrating membrane of a sounding device, the composite vibrating membrane comprises two thermoplastic elastomer layers and one thermosetting polyurethane rubber layer, and the two thermoplastic elastomer layers are respectively arranged on the two surfaces of the thermosetting polyurethane rubber layer.

[0091] The preparation method of the composite diaphragm comprises the following steps:

[0092] A rubber layer is provided, wherein, the preparation method of the rubber layer is: adopt polyurethane rubber to form a film body through a coating process, and dry the film body at a low temperature to form an uncrosslinked polyurethane rubber layer or a semi-crosslinked polyurethane rubber layer layer;

[0093] Laminating the rubber layer and the thermoplastic elastomer layer to form a composite film;

[0094] The composite film is subjected to molding treatment to form a vibrating membrane, and in the molding treatment, the non-crosslinked polyurethane rubbe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite vibrating diaphragm of a sound production device and a preparation method thereof and the sound production device. The composite vibrating diaphragm comprises at least one thermoplastic elastomer layer and at least one thermosetting polyurethane rubber layer, the preparation method comprises the following steps of: providing the rubber layer, wherein the preparation method of the rubber layer comprises the steps of: adopting polyurethane rubber to be prepared into a film body through a film forming technology, wherein the film body is an uncrosslinked polyurethane rubber layer or a semi-crosslinked polyurethane rubber layer; fitting the rubber layer with a thermoplastic elastomer layer to form a composite film; and carrying out molding treatment on the composite film to form a vibrating diaphragm, and carrying out a crosslinking reaction on the non-crosslinked polyurethane rubber layer or the semi-crosslinked polyurethane rubber layer in the moldingtreatment to form a thermosetting polyurethane rubber layer. According to the invention, the bonding force between the diaphragm layers in the composite diaphragm can be improved, the reliability of the existing composite diaphragm structure is improved, the problems of layering and even diaphragm breaking after long-term vibration are avoided, and the overall resilience of the diaphragm is obviously improved.

Description

technical field [0001] The invention relates to the field of acoustic products, in particular to a composite diaphragm of a sounding device, a preparation method thereof, and a sounding device. Background technique [0002] Sound generating devices are important acoustic devices in consumer electronics, which are used to convert electrical signals into sound. With the rapid development of consumer electronics products in recent years, consumers have higher and higher performance requirements for electronic products, and the application fields and environments of electronic products are becoming more and more complex. Under such application requirements, the performance of the sound generating device also needs to be improved. In the existing sound generating devices, the diaphragm is usually used as the element for vibrating and sounding. The diaphragm plays a vital role in the sound reproduction performance of the sound generating device, and it determines the conversion q...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R7/02H04R31/00B32B25/08B32B25/14B32B27/36
CPCB32B25/08B32B25/14B32B27/36H04R7/02H04R31/003
Inventor 闫付臻周厚强李春
Owner GOERTEK INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com