WO2021128118A1

WO2021128118A1 - Diaphragm dome

Info

Publication number: WO2021128118A1
Application number: PCT/CN2019/128542
Authority: WO
Inventors: 狄勋; 陈敏敏; 赵彬
Original assignee: 瑞声科技(新加坡)有限公司; 瑞声声学科技(深圳)有限公司
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2021-07-01

Abstract

The present invention provides a diaphragm dome, comprising: a foaming material layer; a carbon fiber unidirectional belt layer at least provided in the direction of one side of the foaming material layer; and a reinforcing layer at least provided on one side of the carbon fiber unidirectional belt layer, wherein the material of the reinforcing layer is one of or a combination of multiple of felt materials or screen cloth materials. The strength of the carbon fiber unidirectional belt layer in each direction is improved, so that the carbon fiber unidirectional belt layer having strength in only one direction is not prone to break, the structural mechanical property of the dome is improved, and the dome is lighter, thinner, more attractive, not prone to layer, and not prone to break.

Description

A kind of diaphragm dome

Technical field

The invention relates to the technical field of electro-acoustic devices, in particular to the dome of a diaphragm.

Background technique

Dome speaker refers to a speaker that uses a dome diaphragm to directly radiate sound waves. It is a motorized speaker. The diaphragm is a hemispherical diaphragm. The diaphragm is used to directly support the voice coil without a centering support. It is characterized by good high-frequency response, wide directivity and less distortion. The dome top of the diaphragm is usually made of aluminum foil and foam material. With the development of the electronic industry, the electroacoustic system needs to continuously improve the performance and reliability, and the requirements for the dome are also getting higher and higher. The existing aluminum foil and Foamed material composite dome can no longer meet the needs of use, and there are often problems such as aluminum foil chipping, aluminum foil and foaming material delamination, and insufficient material strength. On the other hand, because the aluminum foil material is relatively soft, as an intuitively observable part of the product, it is prone to pollution, scratches, etc., which can cause unsightly problems. Also, the foam material is prone to deformation due to force, and the performance will be restored after force. Poor, unable to withstand pressure, and easy to absorb water, which makes the phenomenon of delamination between aluminum foil and foam material easy to occur. At the same time, in order to achieve vibration strength and ensure mechanical properties, the combined layer thickness of foam material and aluminum foil used in the dome Larger.

technical problem

The purpose of the present invention is to provide a diaphragm dome, which aims to solve the problems of poor mechanical properties, unsightly, easy breakage, difficult layering of materials, and large thickness of the dome structure in the prior art.

The solution to the problem

Technical solutions

The technical scheme of the present invention is as follows: a diaphragm dome, including

Foam material layer;

A carbon fiber unidirectional belt layer arranged at least in the direction of one side of the foamed material layer; and

The reinforcing layer is provided at least on one side of the carbon fiber unidirectional belt layer, and the reinforcing layer material is one or a combination of felt materials or mesh materials.

Preferably, the reinforcing layer is attached to the carbon fiber unidirectional belt layer.

Preferably, the felt material is one or a combination of carbon fiber felt, graphite felt or glass fiber felt.

Preferably, the mesh material is one or a combination of metal mesh or plastic mesh.

Preferably, the thickness of the carbon fiber unidirectional belt layer ranges from 5 um to 100 um.

Preferably, the carbon fiber unidirectional belt layer is formed by a composite of carbon fiber material and resin, and the mass fraction of the resin is 10%-55%.

Preferably, the resin includes epoxy resin, polyether ether ketone, polyimide, polyphenylene sulfide, or polyparaphenylene benzobis

A combination of one or more of the azoles.

Preferably, the thickness of the reinforcing layer is in the range of 1-50um, and the areal density is in the range of 1-20g/m2.

Preferably, the thickness of the foamed material layer is in the range of 20-2000um.

Preferably, the thickness of the dome is in the range of 20-2000um.

Preferably, the foamed material layer is made of one or more of polyethylene terephthalate, polymethacrylimide, polyimide, polypropylene, or polyphenylene sulfide. Made of combined materials.

The beneficial effects of the invention

Beneficial effect

The beneficial effect of the present invention is that by providing a reinforcing layer made of felt material or a combination of one or more of the mesh materials on at least one side of the carbon fiber unidirectional belt layer, the carbon fiber unidirectional belt layer is increased. The strength in all directions makes the carbon fiber unidirectional belt layer with strength only in a single direction not easy to break, and improves the structural mechanical properties of the dome, making it lighter, thinner, more beautiful, not easy to delaminate, and not easy to break.

Brief description of the drawings

Description of the drawings

Fig. 1 is a schematic diagram of the dome structure of the first embodiment of the present invention;

2 is a schematic diagram of the dome structure of the second embodiment of the present invention;

Figure 3 is a schematic diagram of the dome structure of the third embodiment of the present invention;

4 is a schematic diagram of the dome structure of the fourth embodiment of the present invention;

Figure 5 is a schematic diagram of the dome structure of the fifth embodiment of the present invention;

6 is a schematic diagram of the dome structure of the sixth embodiment of the present invention;

The best embodiment for implementing the invention

The best mode of the present invention

The present invention will be further described below in conjunction with the drawings and embodiments.

Example one

This embodiment provides a diaphragm dome, including:

The foamed material layer 10, the carbon fiber unidirectional belt layer 20 and the reinforcement layer 30; the carbon fiber unidirectional belt layer 20 is arranged at least on one side of the foam material, and the reinforcement layer 30 is at least arranged on the carbon fiber unidirectional belt layer. On one side of the belt layer 20, the material of the reinforcing layer 30 is one or a combination of felt materials or mesh materials. Felt materials and mesh materials are isotropic, which can make up for the defect that the carbon fiber unidirectional belt has only one-way strength, and can reinforce the strength of the carbon fiber unidirectional belt in the direction of weak strength. At the same time, because these two types of materials are both highly developed porous structures, they have the advantages of high strength and light weight, and at the same time, they can be directly pre-impregnated with carbon fiber unidirectional tapes by taking advantage of their porous structure being easy to pass through and combining with resin. The resin of the material is heated and bonded to further reduce the quality and thickness of the carbon fiber dome.

Specifically, the foamed material layer 10 is polyethylene terephthalate (foamed PET), polymethacrylimide (foamed PMI), polyimide (foamed PI), poly One of propylene (foamed PP) and polyphenylene sulfide (foamed PPS). In this embodiment, the foamed material layer 10 is specifically polymethacrylimide (foamed PMI), the foamed material layer and carbon fiber The dome formed by the composite of unidirectional belt prepreg can greatly improve the sound quality of the loudspeaker at high frequencies.

Specifically, the reinforcing layer 30 is attached to the carbon fiber unidirectional belt layer 20, and the carbon fiber unidirectional belt layer 20 refers to a material layer composed of a carbon fiber material and a prepreg resin. The carbon fiber unidirectional belt layer 20 is a material formed by compounding a prepreg resin on carbon fibers through a high-pressure and high-temperature technology. The carbon fiber unidirectional belt layer 20 has strength only in a single direction. It can be understood that the carbon fiber unidirectional belt layer 20 can bear a relatively large external force in the high-strength direction of fiber extension, but can only bear a small external force in the weak-strength direction perpendicular to the fiber extension. After the isotropic reinforcing layer 30 is bonded to the carbon fiber unidirectional belt layer 20 with unidirectional strength, the strength of the carbon fiber unidirectional belt layer 20 in all directions is improved.

Specifically, the prepreg resin of the carbon fiber unidirectional tape prepreg in this embodiment includes at least one of the following: epoxy resin, polyether ether ketone (PEEK), polyimide (PI), polyphenylene sulfide (PPS) ), poly(p-phenylene benzodi)

Azole (PBO) and so on. In this embodiment, the tensile modulus of the carbon fiber material is greater than 200 Gpa, and the carbon fiber material is made of organic fibers such as flake graphite crystallites stacked in the axial direction of the fiber, and the crystallites are obtained by carbonization and graphitization. Graphite material. Carbon fiber is "flexible on the outside and rigid on the inside", and its mass is lighter than metal aluminum, but its strength is higher than that of steel, and it has corrosion resistance and high modulus characteristics. In practice, carbon fiber materials can be specifically selected including Toray T series T300 and above, all M series, other series of the same strength level and materials from other suppliers, so that the carbon fiber diaphragm dome of the present invention has a good structure Mechanical properties, while reducing weight and thickness.

Specifically, the total thickness of the carbon fiber diaphragm dome in the embodiment of the present invention is between 20 and 2000um, which not only ensures the strength, but also ensures the convenience of manufacturing; at the same time, the carbon fiber diaphragm dome in the embodiment of the present invention In addition to ensuring the mechanical strength, it can also provide higher acoustic quality, especially when the thickness of the carbon fiber diaphragm dome is 80-200um, it can ensure that the dome and the high-frequency zone have better frequency characteristics and can cover Higher vocal range.

More preferably, the reinforcing layer 30 is a grid-like material with isotropy, and the grid-like material can facilitate the passage of the prepreg resin of the carbon fiber unidirectional belt layer 20, and facilitate the realization of the carbon fiber unidirectional belt layer 20 and the reinforcement. Laminating processing of layer 30.

Specifically, the felt material is one or a combination of carbon fiber felt, graphite felt or glass fiber felt. The mesh material is one or a combination of metal mesh or plastic mesh. The above materials are not only isotropic, that is, they have greater strength in any direction along the plane, which is different from the carbon fiber unidirectional tape prepreg which has strength in a single direction, and the areal density of the above materials is very small. It will increase the weight of the material and maintain the light weight of the carbon fiber diaphragm dome.

In practice, the thickness of the carbon fiber unidirectional belt layer 20 is preferably in the range of 5 um to 100 um, so that the dome can achieve good sound transmission performance while maintaining a relatively light weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 10%-55%, so that the carbon fiber unidirectional belt layer 20 can ensure the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or reinforcement layer under a lighter weight. 30 has a strong bonding strength. The thickness of the reinforcement layer 30 can be 1-50um, and the surface density is 1-20g/m ² , so that the carbon fiber unidirectional belt layer 20 can ensure sufficient all-directional strength without excessively increasing the thickness of the dome and maintain the sound of the dome. The unity of performance and structural strength. The layer thickness of the foamed material layer 10 can be 20-2000um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region. Integrating the configuration range of the above materials, the overall thickness of the carbon fiber diaphragm dome of the present invention can be maintained in the range of 20-2000um after overall planning. A more preferred range is between 80-200um. At this time, the carbon fiber vibration The membrane dome can obtain the best structural strength and acoustic performance.

Specifically, in this embodiment, the carbon fiber unidirectional belt layer 20 is configured to be provided only on one side of the foamed material layer 10. Correspondingly, the reinforcing layer 30 is arranged on the side of the carbon fiber unidirectional belt layer 20 close to the foamed material layer 10.

1, the reinforcing layer 30 is disposed between the foamed material layer 10 and the carbon fiber unidirectional belt layer 20,

Since the reinforcement layer 30 has strength in all directions, the reinforcement layer 30 can maintain the strength between the foam material layer 10 and the carbon fiber unidirectional belt layer 20 when the dome is subjected to external force, and avoid the foam material layer 10 along When the carbon fiber unidirectional belt layer 20 does not have the strength, the carbon fiber unidirectional belt layer 20 is damaged. When the carbon fiber unidirectional belt layer 20 receives an external force, the reinforcing layer 30 can rely on the foam material layer 10 to stabilize the carbon fiber The structural characteristics of the carbon fiber unidirectional belt layer 20 prevent the carbon fiber unidirectional belt layer 20 from breaking in a direction that does not have strength, and increase the strength of the carbon fiber unidirectional belt layer in all directions.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 5 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 10%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcing layer 30 can be 1um, and the surface density is 1g/m2, so that the carbon fiber unidirectional belt layer 20 can ensure sufficient all-directional strength without excessively increasing the thickness of the dome, maintaining the acoustic performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 20 um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region.

Example two

The difference between this embodiment and the first embodiment is that the reinforcing layer 30 is arranged on the side of the carbon fiber unidirectional belt layer 20 away from the foamed material layer 10. Referring to FIG. 2, the carbon fiber unidirectional belt layer 20 is arranged on the foamed material layer 10 and Between the reinforcement layer 30,

Because the reinforcement layer 30 has strength in all directions, the reinforcement layer 30 can keep the structure of the carbon fiber unidirectional belt layer 20 from being damaged when the dome is subjected to external force, and avoid external force directly acting on the carbon fiber unidirectional belt layer 20. Therefore, the carbon fiber unidirectional belt layer 20 is prevented from breaking in a direction that does not have strength, and the strength of the carbon fiber unidirectional belt layer in all directions is increased.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 100 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 55%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcing layer 30 can be 50um and the surface density is 20g/m2, so that the carbon fiber unidirectional belt layer 20 will not excessively increase the thickness of the dome under the condition of sufficient all-directional strength, and maintain the sound performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 2000um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region.

Example three

On the basis of the first embodiment, the reinforcement layer 30 includes a first reinforcement layer 31 and a second reinforcement layer 32,

The first reinforcing layer 31 is disposed on the side of the carbon fiber unidirectional belt layer 20 close to the foam material layer 10, and the second reinforcing layer 32 is disposed on a side of the carbon fiber unidirectional belt layer 20 away from the foam material layer 10. side.

3, because the first reinforcing layer 31 has strength in all directions, so that when the dome receives an external force, the first reinforcing layer 31 can maintain the foam material layer 10 and the carbon fiber unidirectional belt layer 20 At the same time, it avoids the damage of the carbon fiber unidirectional belt layer 20 when the foamed material layer 10 is stressed along the direction where the carbon fiber unidirectional belt layer 20 does not have the strength. The second reinforcement layer 32 can prevent external forces from directly acting on the carbon fiber unidirectional belt layer 20. When the external force acts on the dome, the second reinforcement layer 32 can stabilize the structural characteristics of the carbon fiber unidirectional belt layer 20 and avoid the carbon fiber unidirectional belt layer 20. The layer 20 breaks in a direction that does not have strength, which increases the strength of the carbon fiber unidirectional belt layer in all directions.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 55 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 20%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcing layer 30 can be 20um, and the surface density is 10g/m2, so that the carbon fiber unidirectional belt layer 20 can ensure sufficient all-directional strength without excessively increasing the thickness of the dome, and maintain the sound performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 200 um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched range.

Example four

In this embodiment, on the basis of the first embodiment, the carbon fiber unidirectional belt layer 20 includes a first carbon fiber unidirectional belt layer 21 and a second carbon fiber unidirectional belt layer 22, the first carbon fiber unidirectional belt layer 21 and the second carbon fiber unidirectional belt layer 21 The unidirectional belt layer 22 is respectively arranged on two opposite sides of the foamed material layer 10.

The reinforcement layer 30 includes a first reinforcement layer 31 and a second reinforcement layer 32, a third reinforcement layer 33 and a fourth reinforcement layer 34,

The first reinforcing layer 31 is disposed on the side of the first carbon fiber unidirectional belt layer 21 close to the foamed material layer 10, and the second reinforcing layer 32 is disposed on the first carbon fiber unidirectional belt layer 21 facing away from the foamed material. One side of layer 10,

4, because the first reinforcement layer 31 and the third reinforcement layer 33 have strength in all directions, so that when the dome receives an external force, the first reinforcement layer 31 and the third reinforcement layer 33 can maintain The strength between the foamed material layer 10 and the carbon fiber unidirectional belt layer 20, while avoiding the damage of the carbon fiber unidirectional belt layer 20 when the foamed material layer 10 is stressed along the direction where the carbon fiber unidirectional belt layer 20 has no strength. The second reinforcement layer 32 and the fourth reinforcement layer 34 can prevent the external force from directly acting on the carbon fiber unidirectional belt layer 20. When the external force acts on the dome, the second reinforcement layer 32 and the fourth reinforcement layer 34 can stabilize the carbon fiber The structural characteristics of the unidirectional belt layer 20 prevent the carbon fiber unidirectional belt layer 20 from breaking in directions that do not have strength, and increase the strength of the carbon fiber unidirectional belt layer in all directions.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 75 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 40%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcement layer 30 can be 30um, and the surface density is 15g/m2, so that the carbon fiber unidirectional belt layer 20 will ensure sufficient all-directional strength without excessively increasing the thickness of the dome, maintaining the acoustic performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 800 um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region.

Example five

The reinforcing layer 30 includes a first reinforcing layer 31 and a third reinforcing layer 33. The first reinforcing layer 31 is arranged on the side of the first carbon fiber unidirectional belt layer 21 close to the foam material layer 10, so The third reinforcing layer 33 is arranged on the side of the second carbon fiber unidirectional belt layer 21 close to the foamed material layer 10.

Referring to FIG. 5, since the first reinforcement layer 31 and the third reinforcement layer 33 have strength in all directions, the first reinforcement layer 31 and the third reinforcement layer 33 can keep foaming when the dome is subjected to an external force. The strength between the material layer 10 and the carbon fiber unidirectional belt layer 20 prevents the carbon fiber unidirectional belt layer 20 from being damaged when the foamed material layer 10 is stressed along the direction where the carbon fiber unidirectional belt layer 20 does not have the strength. When the belt layer 20 receives an external force, the first reinforcement layer 31 and the third reinforcement layer 33 can rely on the foamed material layer 10 to stabilize the structural characteristics of the carbon fiber unidirectional belt layer 20, and prevent the carbon fiber unidirectional belt layer 20 from having no strength. The fracture in the direction of the carbon fiber increases the strength of the carbon fiber unidirectional belt layer in all directions.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 20 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 45%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcement layer 30 can be 5um, and the surface density is 40g/m2, so that the carbon fiber unidirectional belt layer 20 will not excessively increase the thickness of the dome under the condition of sufficient all-directional strength, and maintain the sound performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 150 um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region. The overall thickness of the carbon fiber diaphragm dome is 200um to obtain the best structural strength and acoustic performance, and the overall dome is light and thin, has good frequency characteristics, and can cover a higher sound range. .

Example Six

The reinforcing layer 30 includes a second reinforcing layer 32 and a fourth reinforcing layer 34. The second reinforcing layer 32 is disposed on the side of the first carbon fiber unidirectional belt layer 21 close to the foamed material layer 10. The fourth reinforcing layer 34 is arranged on the side of the second carbon fiber unidirectional belt layer 21 close to the foamed material layer 10.

Referring to Fig. 6, since the second reinforcement layer 32 and the fourth reinforcement layer 34 have strength in all directions, the second reinforcement layer 32 and the fourth reinforcement layer 34 can maintain the carbon fiber single layer when the dome is subjected to external force. The structure of the direction belt layer 20 is not damaged, avoiding external forces directly acting on the carbon fiber unidirectional belt layer 20, thereby preventing the carbon fiber unidirectional belt layer 20 from breaking in directions that do not have strength, and increasing the carbon fiber unidirectional belt layer in all directions. strength.

Moreover, the thickness range of the carbon fiber unidirectional belt layer 20 is preferably 10 um, so that the dome can achieve good sound transmission performance while maintaining a lighter weight. The prepreg resin of the carbon fiber unidirectional belt layer 20 can be selected with a mass fraction of 25%, so that the carbon fiber unidirectional belt layer 20 can ensure that the carbon fiber unidirectional belt layer 20 and the foam material layer 10 or the reinforcing layer 30 have a relatively low weight under a lighter weight. Strong bonding strength. The thickness of the reinforcing layer 30 can be 10um, and the surface density is 20g/m2, so that the carbon fiber unidirectional belt layer 20 can ensure sufficient all-directional strength without excessively increasing the thickness of the dome, maintaining the sound performance and structural strength of the dome. Unite. The layer thickness of the foamed material layer 10 is 60 um, so that the dome has excellent acoustic properties and can obtain greater stability in the high-pitched region. The overall thickness of the carbon fiber diaphragm dome is 80um to obtain the best structural strength and acoustic performance, and the overall dome is light and thin, has good frequency characteristics, and can cover a higher sounding range.

Therefore, the present invention provides a reinforcing layer made of felt material or mesh material or a combination of one or more of the carbon fiber unidirectional belt layers on at least one side of the carbon fiber unidirectional belt layer, thereby increasing the carbon fiber unidirectional belt layer in each The strength of the direction makes the carbon fiber unidirectional belt layer with strength only in a single direction not easy to break, and improves the structural mechanical properties of the dome, making it lighter and thinner, beautiful, not easy to delaminate, and not easy to break.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A diaphragm dome is characterized in that it comprises:

Foam material layer;

A carbon fiber unidirectional belt layer arranged at least in the direction of one side of the foamed material layer; and

The reinforcing layer is provided at least on one side of the carbon fiber unidirectional belt layer, and the reinforcing layer material is one or a combination of felt materials or mesh materials.
The diaphragm dome of claim 1, wherein the reinforcing layer is attached to the carbon fiber unidirectional belt layer.
The diaphragm dome according to claim 1, wherein the felt material is one or a combination of carbon fiber felt, graphite felt, or glass fiber felt.
The diaphragm dome according to claim 1, wherein the mesh material is one or a combination of metal mesh or plastic mesh.
The diaphragm dome of claim 1, wherein the thickness of the carbon fiber unidirectional belt layer ranges from 5um to 100um.
The diaphragm dome according to claim 1 or 5, wherein the carbon fiber unidirectional belt layer is composited by carbon fiber material and resin, and the mass fraction of the resin is 10%-55%.
The diaphragm dome according to claim 6, wherein the resin comprises epoxy resin, polyether ether ketone, polyimide, polyphenylene sulfide, or poly(p-phenylene benzobis)
A combination of one or more of the azoles.
The diaphragm dome of claim 1, wherein the thickness of the reinforcing layer is in the range of 1-50um, and the areal density is in the range of 1-20g/m 2 .
The diaphragm dome according to claim 1, wherein the thickness of the foamed material layer is in the range of 20-2000um.
The diaphragm dome of claim 1, wherein the thickness of the dome is in the range of 20-2000um.
The diaphragm dome according to claim 1, wherein the foamed material layer is polyethylene terephthalate, polymethacrylimide, polyimide, polypropylene, or It is made of one material or a combination of multiple materials in polyphenylene sulfide.