CN111711889A

CN111711889A - Planar vibrating diaphragm vibration system, preparation method thereof and planar vibrating diaphragm loudspeaker

Info

Publication number: CN111711889A
Application number: CN202010713744.3A
Authority: CN
Inventors: 刘科海; 杨方友; 何梦林; 刘开辉; 王恩哥
Original assignee: Songshan Lake Materials Laboratory
Current assignee: Songshan Lake Materials Laboratory
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-09-25

Abstract

The application provides a planar vibrating diaphragm vibration system, a preparation method thereof and a planar vibrating diaphragm loudspeaker, and relates to the technical field of sound equipment manufacturing. The plane vibrating diaphragm vibration system comprises a graphene diaphragm, an insulating layer and a voice coil which are sequentially stacked. The voice coil is made of graphene. The graphene film is used for making the vibrating diaphragm, so that the transient reaction of sound is better, and the sound is reduced to the maximum extent. Because graphite alkene itself has electric conductivity, it is lighter for voice coil loudspeaker voice coils such as traditional copper product, adopts graphite alkene to make the voice coil loudspeaker voice coil promptly and can reduce the weight of plane vibrating diaphragm vibration system and the speaker that adopts this plane vibrating diaphragm vibration system to make, makes the developments and the detail of the whole speaker that adopts this plane vibrating diaphragm vibration system to make more abundant. The plane vibrating diaphragm loudspeaker comprises a magnetic group, a supporting body and the plane vibrating diaphragm vibration system, wherein the supporting body is provided with an accommodating groove, the magnetic group is fixed in the accommodating groove, and the plane vibrating diaphragm vibration system is connected to the supporting body and is attached to the magnetic group through a graphene film.

Description

Planar vibrating diaphragm vibration system, preparation method thereof and planar vibrating diaphragm loudspeaker

Technical Field

The application relates to the technical field of sound equipment manufacturing, in particular to a plane vibrating diaphragm vibration system, a preparation method of the plane vibrating diaphragm vibration system and a plane vibrating diaphragm loudspeaker.

Background

Sound is generated by vibration, and a diaphragm is an element that generates vibration. An excellent and desirable loudspeaker diaphragm should have: the mass density is relatively small, so that the diaphragm is lighter; the Young modulus of the material mechanics is relatively large, so that the vibrating diaphragm has good rigidity, and a proper internal damping factor is required to absorb unnecessary clutter emitted by the vibrating diaphragm in the vibrating process, so that distortion is brought.

From the aspect of diaphragm materials, the diaphragms of the loudspeaker are divided into: the paper pulp vibrating diaphragm has the advantages of low cost and excellent low-frequency effect, but has no great advantages in the aspects of rigidity and weight. Therefore, for the loudspeaker diaphragm of the earphone, the most common diaphragm is still a polymer diaphragm such as PET mainly made of polymer material.

Disclosure of Invention

An object of the embodiments of the present application is to provide a planar diaphragm vibration system, a method for manufacturing the same, and a planar diaphragm speaker, which can simultaneously have accurate sound reproduction and good sensitivity.

In a first aspect, an embodiment of the present application provides a planar diaphragm vibration system, which includes: the graphene film, the insulating layer, and the voice coil are sequentially stacked.

The voice coil is made of graphene.

In the implementation process, the graphene film has the characteristics of ultralight weight, ultrathin property and high strength. The graphene film is used for making the vibrating diaphragm, so that the transient reaction of sound is better, and the sound is reduced to the maximum extent. Simultaneously, because graphite alkene itself has electric conductivity, it is lighter for voice coil loudspeaker voice coils such as traditional copper product, adopts graphite alkene to make the voice coil loudspeaker voice coil promptly and can reduce the weight of plane vibrating diaphragm and the speaker that adopts this plane vibrating diaphragm vibration system to make, makes the developments and the detail of the whole speaker that adopts this plane vibrating diaphragm vibration system to make more abundant.

In one possible embodiment, the graphene film has a thickness of 10 to 100 nm.

In the implementation process, the graphene diaphragm made of graphene has the characteristic of being ultrathin.

In one possible embodiment, the shape of the voice coil includes a spiral, a rectangle, a Z-shape, or a hyperbolic shape.

In one possible embodiment, the flat diaphragm vibration system further includes a fixing sheet attached to an edge of the graphene film and/or the insulating layer to maintain the graphene film, the insulating layer, and the voice coil in an unfolded state.

In the implementation process, due to the characteristic that the graphene film and the voice coil are ultrathin, folds or deformation are easy to generate. The fixing sheet can fix the edge of the graphene film and/or the insulating layer, so that the graphene film and/or the insulating layer can be kept in an unfolded state, and meanwhile, the strength of the plane vibrating diaphragm vibration system can be improved, and the loudspeaker can be conveniently formed by subsequent installation.

In a second aspect, an embodiment of the present application provides a method for manufacturing a planar diaphragm vibration system, including: and sequentially laminating and bonding the first graphene film, the insulating layer and the second graphene film to form a vibrating diaphragm assembly, and cutting the first graphene film to form a voice coil to obtain the plane vibrating diaphragm vibration system.

In the implementation process, the first graphene film, the insulating layer and the second graphene film are sequentially stacked and bonded to form the vibrating diaphragm assembly, and then the first graphene film is cut to form the voice coil on the basis of the vibrating diaphragm assembly. The preparation method is simple and convenient, and the prepared plane vibrating diaphragm vibration system is light in weight.

In a third aspect, an embodiment of the present application provides a method for manufacturing a planar diaphragm vibration system, including: and cutting the first graphene film to form a voice coil, and sequentially laminating and bonding the voice coil, the insulating layer and the second graphene film to form the plane vibrating diaphragm vibration system.

In the implementation process, the first graphene film is cut to form the voice coil, and then the voice coil, the insulating layer and the second graphene film are sequentially stacked and bonded to form the plane diaphragm vibration system. The preparation method is simple and convenient, and the prepared plane vibrating diaphragm vibration system is light in weight.

In a fourth aspect, an embodiment of the present application provides a method for manufacturing a planar diaphragm vibration system, including: and cutting the first graphene film to form a voice coil, and bonding the voice coil and the second graphene film by using insulating glue to form the plane vibrating diaphragm vibration system.

In the above-mentioned realization process, the voice coil loudspeaker voice coil that this application embodiment will obtain the cutting and second graphite alkene form plane vibrating diaphragm vibration system with the bonding of reason glue, wherein can separate voice coil loudspeaker voice coil and second graphite alkene after the insulating cement solidifies, play the effect of insulating layer. The preparation method is simple and convenient, and the prepared plane vibrating diaphragm vibration system is light in weight.

In a fifth aspect, an embodiment of the present application provides a planar diaphragm speaker, which includes a magnetic group, a support body, and the planar diaphragm vibration system described above, where the support body is provided with an accommodating groove, the magnetic group is fixed in the accommodating groove, and the planar diaphragm vibration system is connected to the support body and attached to the magnetic group through a graphene film.

In the implementation process, the loudspeaker manufactured by the planar diaphragm vibration system has better transient response and more accurate sound reduction. Simultaneously, the weight greatly reduced of speaker, the sensitivity of speaker promotes.

In one possible embodiment, the magnet assembly comprises at least two ring magnets, the at least two ring magnets being arranged concentrically.

In the implementation process, the at least two annular magnets are concentrically arranged, so that the magnetic field distribution of the annular magnets is more uniform and reasonable, and the vibration of the electrified voice coil after being stressed in the magnetic field is facilitated.

In a possible embodiment, the planar diaphragm loudspeaker further includes a mesh enclosure, and the mesh enclosure is sleeved outside the voice coil to prevent dust from entering the planar diaphragm vibration system.

In the implementation process, the mesh enclosure is sleeved outside the voice coil to prevent dust from entering the plane diaphragm vibration system to influence the vibration of the plane diaphragm vibration system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a front view of a planar diaphragm vibration system according to an embodiment of the present application;

FIG. 2 is an exploded view of a planar diaphragm vibration system according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a planar diaphragm vibration system according to an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a planar diaphragm vibration system according to an embodiment of the present application;

FIG. 5 is a front view of a planar diaphragm vibration system with a stator attached thereto according to an embodiment of the present application;

FIG. 6 is an exploded view of a mounting fixture of a planar diaphragm vibration system according to an embodiment of the present invention;

fig. 7 is a front view of a planar diaphragm loudspeaker according to an embodiment of the present application;

fig. 8 is an exploded view of a flat diaphragm loudspeaker according to an embodiment of the present application;

fig. 9 is a cross-sectional view of a planar diaphragm loudspeaker according to an embodiment of the present application;

fig. 10 is a partial cross-sectional view of a planar diaphragm loudspeaker according to an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a support body after a magnetic assembly is installed thereon according to an embodiment of the present application;

FIG. 12 is a cross-sectional view of a support with a magnetic assembly mounted thereon according to an embodiment of the present invention;

FIG. 13 is an exploded view of a support body and magnet pack according to an embodiment of the present application.

Icon: 10-a planar diaphragm vibration system; 100-graphene films; 200-an insulating layer; 300-a voice coil; 301-a first terminal; 302-a second terminal; 410-a first stator; 420-a second stator; 20-a planar diaphragm loudspeaker; 500-magnetic group; 600-a support; 601-a first receiving tank; 602-a second receiving groove; 700-mesh enclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 4, an embodiment of the present application provides a planar diaphragm vibration system 10, which includes a graphene film 100, an insulating layer 200, and a voice coil 300 sequentially stacked.

The material of the voice coil 300 includes graphene.

The inventor finds that graphene has high strength, the graphene film 100 made of graphene has the characteristics of being ultra-light and ultra-thin, the voice coil 300 made of the graphene film 100 and the graphene film 100 serving as a diaphragm body can meet the requirements of loudspeaker diaphragms such as earphones on weight and volume control, and meanwhile, the strength of the loudspeaker diaphragms is guaranteed.

The graphene film 100 has the characteristics of being ultrathin and ultralight, and the graphene film 100 is used for manufacturing the diaphragm body in the embodiment of the application, so that the transient response of the loudspeaker can be improved, and the sound can be restored more accurately. Meanwhile, the embodiment of the application utilizes the conductivity of the graphene to manufacture the voice coil 300, so as to replace the metal material voice coil in the traditional form, thereby greatly reducing the weight of the voice coil 300, improving the sensitivity of the vibration system and ensuring that the dynamic and detail of the whole loudspeaker manufactured by the plane vibrating diaphragm vibration system 10 are more sufficient.

Optionally, the graphene film 100 has a thickness of 10 to 100 nm.

In one embodiment of the present application, the graphene film 100 has a thickness of 10 nm. In some other embodiments of the present application, the graphene film 100 may also have a thickness of 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, or 100 nm.

In general, the thinner the graphene film 100 is, the better the strength is.

Optionally, the thickness of the voice coil 300 is 10-100 nm.

In one embodiment of the present application, the voice coil 300 has a thickness of 10 nm. In some other embodiments of the present application, the thickness of the voice coil 300 may be 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, or 100 nm.

In general, on the premise that the strength is satisfied, the lighter the weight of the voice coil 300 is, the better, and when the material of the voice coil 300 is determined, the smaller the thickness of the voice coil 300 can reduce the weight of the voice coil 300.

The voice coil 300 has a first terminal 301 and a second terminal 302, and the first terminal 301 and the second terminal 302 are respectively used for connecting a wire, so that the voice coil 300 forms a resistor, and the first terminal 301 and the second terminal 302 are respectively located at the edge of the voice coil 300 for convenience of connection.

The shape of the voice coil 300 is not limited in the present application. In the embodiment shown in fig. 1-4, the voice coil 300 is in the form of a spiral, i.e., a planar spiral voice coil 300, and the voice coil 300 with such a shape has a good vibration balance. In other embodiments of the present application, the shape of the voice coil 300 may also be rectangular, Z-shaped, or hyperbolic, among other shapes.

Since the diaphragm body in the embodiment of the present application is also made of graphene, it may not have conductivity, and the insulating layer 200 is disposed between the graphene film 100 and the graphene voice coil 300, so that the graphene film 100 and the graphene voice coil 300 can be separated from each other, and the voice coil 300 itself forms a resistor to prevent short circuit.

Also, in order to prevent the edge of the graphene film 100 from contacting the voice coil 300, the insulating layer 200 has a size slightly larger than the graphene film 100 or the voice coil 300 so that the graphene film 100 and the voice coil 300 can be completely separated.

The material of the insulating layer 200 may be any non-conductive material, such as a polymer material, including but not limited to polyethylene, polyvinyl chloride, polypropylene, polycarbonate, polyethylene terephthalate, and the like.

Referring to fig. 5 and 6, the planar diaphragm vibration system 10 further includes a fixing plate connected to an edge of the graphene film 100 and/or the insulating layer 200.

Due to the ultra-thin characteristics of the graphene film 100 and the voice coil 300, wrinkles or deformation are easily generated. The fixing sheet can fix the edge of the graphene film 100 and/or the insulating layer 200 to maintain the unfolded state, and can improve the strength of the planar diaphragm vibration system 10, thereby facilitating the subsequent installation and formation of the speaker.

In the embodiment shown in fig. 5 and 6, the fixing sheet includes a first fixing sheet 410 having a ring shape and a second fixing sheet 420 having a ring shape, the first fixing sheet 410 being attached to the graphene film 100, and the second fixing sheet 420 being attached to the insulating layer 200. The first fixing piece 410 has a size slightly larger than that of the graphene film 100, and the second fixing piece 420 has a size slightly larger than that of the insulating layer 200, and the first fixing piece 410 and the second fixing piece 420 have the same size in order to make the entire flat diaphragm vibration system 10 uniform in the vertical dimension and facilitate uniform stress on the first fixing piece 410 and the second fixing piece 420.

The edge of the second stator 420 connected to the insulating layer 200 has one or two notches for corresponding to the two terminals of the voice coil 300 to expose the two terminals of the voice coil 300.

In the embodiment shown in fig. 5 to 6, the two terminals of the voice coil 300 are adjacent to each other, and the second fixing piece 420 is provided with only one notch, which can expose both terminals of the voice coil 300. In other embodiments of the present application, when the two terminals of the voice coil 300 are far away, the second fixing plate 420 may be provided with two notches, and the two notches respectively correspond to the two terminals, so that the two terminals are exposed.

The shape of the planar diaphragm vibration system 10 is not limited in the embodiments of the present application. In the embodiment shown in fig. 1-6, the shape of the flat-diaphragm vibration system 10 is circular, i.e., the graphene film 100, the insulating layer 200, and the voice coil 300 are all circular, and the diameter of the insulating layer 200 is equal to the diameter of the graphene film 100 but larger than the diameter of the voice coil 300. And the graphene film 100, the insulating layer 200, and the voice coil 300 are concentrically disposed. The first fixing sheet 410 and the second fixing sheet 420 are both circular rings, and the first fixing sheet 410 and the second fixing sheet 420 fix the graphene film 100 and the insulating layer 200, respectively. In other embodiments of the present application, the shape of the planar diaphragm vibration system 10 may also be rectangular, diamond, oval, or the like.

The present application further provides a method for manufacturing the planar diaphragm vibration system 10, which includes the following three methods:

(1) the first graphene film 100, the insulating layer 200, and the second graphene film 100 are sequentially stacked and bonded to form a diaphragm assembly, and the first graphene film 100 is cut to form the voice coil 300.

In the embodiment of the application, the first graphene film 100, the insulating layer 200 and the second graphene film 100 are sequentially stacked and bonded to form the diaphragm assembly, and then the first graphene film 100 is cut to form the voice coil 300 on the basis of the diaphragm assembly, which is more convenient, and the formed voice coil 300 has a more complete shape.

Alternatively, the method of cutting the first graphene film 100 to form the voice coil 300 includes laser cutting or the like.

(2) The first graphene film 100 is cut to form the voice coil 300, and the voice coil 300, the insulating layer 200, and the second graphene film 100 are sequentially stacked and bonded.

(3) The first graphene film 100 is cut to form a voice coil 300, and the voice coil 300 and the second graphene film 100 are bonded with an insulating adhesive.

The voice coil 300 and the second graphene obtained by cutting are bonded by the edge adhesive to form the plane diaphragm vibration system 10 in the embodiment of the application, wherein the voice coil 300 and the second graphene can be separated after the insulating adhesive is solidified, and the function of the insulating layer 200 is achieved.

After the flat diaphragm vibration system 10 including the graphene film 100, the insulating layer 200, and the voice coil 300 stacked in this order is obtained, the first fixing plate 410 is bonded to the graphene film 100, the second fixing plate 420 is bonded to the insulating layer 200, and two terminals of the voice coil 300 are leaked, so that the flat diaphragm vibration system 10 is manufactured.

Referring to fig. 7 to 10, the present application further provides a planar diaphragm loudspeaker 20, which includes a magnetic assembly 500, a support 600, and the planar diaphragm vibration system 10.

Referring to fig. 11 to 13, the supporting body 600 is provided with a first receiving groove 601, the magnetic assembly 500 is fixed in the first receiving groove 601, and the magnetic assembly 500 includes at least two ring magnets.

In the embodiment shown in fig. 11 to 13, the supporting body 600 is a cylindrical structure, a circular first receiving groove 601 is disposed in a middle portion of one end surface thereof, and the magnetic assembly 500 includes two ring-shaped magnets concentrically disposed in the first receiving groove 601. In other embodiments of the present application, the supporting body 600 may also have a rectangular, oval, or the like structure, and the magnetic group 500 may further include three, four, or more ring magnets.

Referring to fig. 7 to 10, the planar diaphragm vibration system 10 is connected to the support 600 and the graphene film 100 is attached to the magnetic assembly 500. The flat-diaphragm speaker 20 further includes a mesh enclosure 700, and the mesh enclosure 700 is disposed outside the voice coil 300 to prevent dust from entering the flat-diaphragm vibration system 10.

In the embodiment shown in fig. 7 to 10, the supporting body 600 is further provided with a raised edge, the raised edge is higher than the thickness of the planar diaphragm vibration system 10, and the diameter of the end surface of the supporting body 600 is slightly larger than the diameter of the planar diaphragm vibration system 10, the planar diaphragm vibration system 10 can be disposed just inside the second receiving groove 602 formed on the raised edge, so that the planar diaphragm vibration system 10 can be confined in the second receiving groove 602 and the position thereof does not move relative to the magnetic assembly 500, and the voice coil 300 in the planar diaphragm vibration system 10 can stably vibrate in the magnetic field. The mesh enclosure 700 is directly sleeved on the edge of the support body 600, and the mesh enclosure 700 and the support body 600 form a closed cavity for accommodating the planar diaphragm vibration system 10 and the magnetic assembly 500, so as to prevent dust from entering the cavity to influence the vibration of the planar diaphragm vibration system 10.

The protruding edge of the support body 600 is provided with one or two notches, and the notches are used for corresponding to the two terminals of the voice coil 300, so that the two terminals of the voice coil 300 are exposed.

In the embodiment shown in fig. 7 to 10, the two terminals of the voice coil 300 are adjacent to each other, and the protruding edge of the supporting body 600 is provided with only one notch, which can expose both terminals of the voice coil 300. In other embodiments of the present application, when the two terminals of the voice coil 300 are far away, two notches may be disposed on the protruding edge of the support body 600, and the two notches correspond to the two terminals respectively, so that the two terminals are exposed.

In the embodiment of the present application, the material of the supporting body 600 is not limited, and the supporting body 600 may be made of plastic or metal, which requires a certain hardness.

The planar diaphragm loudspeaker 20 of the embodiment of the application is manufactured by the following method:

firstly, the magnetic assembly 500 is bonded in the first receiving groove 601 of the support body 600 by a jig or an adhesive to form a magnetic field loop, then the planar diaphragm vibration system 10 is bonded in the second receiving groove 602 of the support body 600 by a jig or an adhesive, and finally the mesh enclosure 700 is installed on the raised edge of the support body 600, so that the whole planar diaphragm loudspeaker 20 is formed.

In summary, the embodiment of the present application provides a planar diaphragm vibration system, a manufacturing method thereof, and a planar diaphragm speaker. The graphene film 100 has the characteristics of being ultrathin and ultralight, and the graphene film 100 is used for manufacturing the diaphragm body in the embodiment of the application, so that the transient response of the loudspeaker can be improved, and the sound can be restored more accurately. Meanwhile, the embodiment of the application utilizes the conductivity of the graphene to manufacture the voice coil 300, so as to replace the metal material voice coil in the traditional form, thereby greatly reducing the weight of the voice coil 300, improving the sensitivity of the vibration system and ensuring that the dynamic and detail of the whole loudspeaker manufactured by the plane vibrating diaphragm vibration system 10 are more sufficient.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plane vibrating diaphragm vibration system is characterized in that the vibrating diaphragm comprises a graphene film, an insulating layer and a voice coil which are sequentially stacked;

the voice coil is made of graphene.

2. The plane diaphragm vibration system of claim 1, wherein the graphene film has a thickness of 10-100 nm.

3. The flat-diaphragm vibration system of claim 1, wherein the voice coil has a shape including a spiral, a rectangle, a Z-shape, or a hyperbola.

4. The flat diaphragm vibration system of claim 1, further comprising a securing tab attached to an edge of the graphene membrane and/or the insulating layer to maintain the graphene membrane, the insulating layer, and the voice coil in an unfolded state.

5. A method for preparing a planar diaphragm vibration system is characterized by comprising the following steps: and sequentially laminating and bonding a first graphene film, an insulating layer and a second graphene film to form a vibrating diaphragm assembly, and cutting the first graphene film to form a voice coil to obtain the plane vibrating diaphragm vibration system.

6. A method for preparing a planar diaphragm vibration system is characterized by comprising the following steps: and cutting the first graphene film to form a voice coil, and sequentially laminating and bonding the voice coil, the insulating layer and the second graphene film to form the plane vibrating diaphragm vibration system.

7. A method for preparing a planar diaphragm vibration system is characterized by comprising the following steps: and cutting the first graphene film to form a voice coil, and bonding the voice coil and the second graphene film by using insulating glue to form the plane vibrating diaphragm vibration system.

8. A planar diaphragm loudspeaker, comprising a magnetic assembly, a support and the planar diaphragm vibration system of any one of claims 1 to 4, wherein the support is provided with a receiving groove, the magnetic assembly is fixed in the receiving groove, and the planar diaphragm vibration system is connected to the support and attached to the magnetic assembly through the graphene film.

9. The flat-diaphragm loudspeaker of claim 8, wherein the magnetic assembly includes at least two ring magnets, the at least two ring magnets being concentrically arranged.

10. The flat-diaphragm loudspeaker of claim 8, further comprising a mesh enclosure, wherein the mesh enclosure is disposed outside the voice coil to prevent dust from entering the flat-diaphragm vibration system.