An ultrathin conductive diaphragm and loudspeaker

Abstract

The application provides an ultrathin conductive diaphragm, which comprises a conductive composite layer; the conductive composite layer comprises an outer conductive part, an inner copper foil part, a connecting part and an insulating film adhered to the connecting part; the inner copper foil part is arranged in the outer conductive part; the connecting part connects the outer conductive part and the inner copper foil part; and the insulating film covers and adheres to the upper side and / or the lower two sides of the connecting part respectively. The ultrathin conductive diaphragm provided by the application is provided with positive and negative electrode pads in the middle of the inner copper foil part; a voice coil can be directly connected with the positive and negative electrode pads, so that the use of a voice coil lead is avoided, the damage of a loudspeaker caused by the breakage of the voice coil lead is prevented, and the service life of the loudspeaker is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of loudspeakers, in particular, to an ultrathin conductive diaphragm and a loudspeaker. BACKGROUND

[0002] The conventional loudspeaker structure generally includes a magnet, a U-shaped iron, a cone, a voice coil, a diaphragm, a spring, etc. The existing loudspeaker has a relatively large and heavy volume, and the voice coil lead is prone to breakage, resulting in a relatively low service life of the loudspeaker, which cannot meet the needs of people. For example, Chinese patent document CN201720323750.1 discloses a micro loudspeaker, which includes a shell, the shell accommodating a vibration assembly and a magnetic circuit assembly, the vibration assembly including a diaphragm and a voice coil combined below the diaphragm, the voice coil having a lead, a buffer spring pad being provided between the lead electrical connection end and the lead exit end and close to the lead electrical connection end, the buffer spring pad being fixed to the shell and wrapping and clamping the lead. Since the buffer spring pad is provided between the electrical connection end and the exit end to wrap and clamp the lead, the vibration conducted through the lead is absorbed by the buffer spring pad, thereby isolating the vibration impact of the voice coil vibration on the lead and the FPCB solder joint, greatly prolonging the vibration life of the lead. The buffer spring pad is provided close to the lead electrical connection end, which isolates the vibration while not interfering with the vibration of the voice coil, thereby improving the reliability of the micro loudspeaker without affecting its acoustic performance.

[0003] In the loudspeaker, the voice coil is connected to the solder joint through the voice coil lead, which is a conventional structure. However, during the rotation of the voice coil, the lead vibrates and is prone to breakage, causing damage to the loudspeaker and reducing the service life of the loudspeaker.

[0004] In addition, with the development of technology, electronic devices in life are developing towards lightness and miniaturization, which also requires people to reduce the thickness of the loudspeaker and produce lighter and thinner products. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides an ultrathin conductive diaphragm and a loudspeaker with the conductive diaphragm, which solves the problem of easy breakage of the voice coil lead of the existing loudspeaker, resulting in a relatively low service life of the loudspeaker.

[0006] The technical scheme of the present application is as follows: an ultrathin conductive diaphragm, comprising a conductive composite layer; the conductive composite layer comprises an outer conductive part, an inner copper foil part, a connecting part, and an insulating film adhered to the connecting part; the inner copper foil part is provided in the outer conductive part, the connecting part connects the outer conductive part and the inner copper foil part, and the insulating film covers and adheres to the upper side or / and lower side of the connecting part.

[0007] The outer conductive part is point-shaped, sheet-shaped, strip-shaped or ring-shaped; the inner copper foil part is point-shaped, sheet-shaped, strip-shaped or ring-shaped.

[0008] The conductive composite layer further comprises at least one set of positive and negative electrode welding points; the positive and negative electrode welding points are arranged on the inner copper foil part, between the two inner copper foil parts, or on the two copper foil sheets extending from the inner copper foil part and connecting the two inner copper foil parts.

[0009] The outer conductive part is provided with wire welding points; the wire welding points are arranged on the end part of the outer conductive part, or on the extension part extending from the end part of the outer conductive part.

[0010] The connecting part is in the shape of ∫, S, M, W, I or wave.

[0011] The material of the connecting part is conductive metal, the thickness of the connecting part is 0.05-1mm, and the width of the connecting part is 0.05-3mm.

[0012] The insulating film is a single-layer film or a 2-5 layer composite film, and each layer is bonded by adhesive.

[0013] The material of the insulating film is selected from one or several of polyethylene terephthalate (PET), polyether ether ketone (PEEK), polyether amine (PEA), polyethylene naphthalate (PEN), polyurethane (PU) or polyether imide (PEI).

[0014] The connecting part is further provided with an elastic layer; the material of the elastic layer is metal, plastic, carbon fiber or glass fiber; the elastic layer is located between the connecting part and the insulating film, or outside the insulating film.

[0015] The ultrathin conductive diaphragm further comprises a diaphragm, which is bonded with the conductive composite layer; the diaphragm has a diaphragm middle part, the edge of which is adhered to the inner copper foil part on one side; the edge of the diaphragm middle part further extends to a diaphragm R edge, the middle part of which is bulged between the outer conductive part and the inner copper foil part, and the outer edge of which is adhered to the outer conductive part.

[0016] The material of the diaphragm is plastic, cloth, silk, rubber or foaming material; wherein the plastic is selected from PEI, PET, PEN, PEEK, PMI or PU.

[0017] The diaphragm middle part is bulged in convex shape, or is flatly attached to the insulating film.

[0018] When the diaphragm middle part is flatly attached to the insulating film, a body is adhered thereto.

[0019] The body is made of wood, metal, plastic, glass fiber, carbon fiber, cloth or rubber; wherein the metal is light metal such as aluminum, copper, titanium and its alloy, and the plastic is PEI, PET, PEN, PEEK, PMI or PU.

[0020] The vibrating diaphragm R side is provided as a single bulge or a plurality of continuous bulges.

[0021] A loudspeaker with the above-mentioned ultra-thin conductive vibrating diaphragm.

[0022] The present application has the following advantages: the ultra-thin conductive vibrating diaphragm comprises a conductive composite layer; the conductive composite layer comprises an outer conductive part, an inner copper foil part, a connecting part, and an insulating film adhered to the connecting part; the inner copper foil part is arranged in the outer conductive part, the connecting part connects the outer conductive part and the inner copper foil part, and the insulating film covers and adheres to the upper side and / or the lower side of the connecting part, respectively. When the ultra-thin conductive vibrating diaphragm is used to produce a loudspeaker, positive and negative electrode pads are arranged on the inner copper foil part, and the voice coil can be directly connected to the positive and negative electrode pads, thereby avoiding the use of voice coil leads, preventing the damage of the loudspeaker caused by the breakage of the voice coil leads, and improving the service life of the loudspeaker. In terms of production, the use of the ultra-thin conductive vibrating diaphragm also simplifies the production process of the loudspeaker and reduces the production cost. The connecting part not only has a conductive effect, but also balances and supports the vibrating diaphragm, preventing the vibrating diaphragm from losing balance during vibration due to insufficient supporting force and resilience, thereby causing distortion or noise, especially when the M (vibration mass) is large, the C (elastic coefficient) of the vibrating diaphragm cannot well control the piston movement of the voice coil, it is difficult to reduce F0 and widen the low frequency, and the amplitude of vibration is suppressed, thereby preventing the loudspeaker from bearing large power. The connecting part also has the effect of enhancing the rigidity of the vibrating diaphragm body part, which can effectively suppress the distortion caused by segmented vibration.

[0023] In addition, the ultra-thin conductive vibrating diaphragm of the present application cancels the voice coil leads, which not only reduces the product height, but also avoids the product failure rate caused by the voice coil leads.

[0024] The ultra-thin conductive vibrating diaphragm can be mass-produced, thereby improving the consistency and yield of the product.

[0025] The ultra-thin conductive vibrating diaphragm can be provided with a plurality of inner copper foil parts, which can also form a multi-magnetic circuit array, thereby greatly improving the sensitivity of the product. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural diagram of the conductive composite layer 10 of the ultra-thin conductive vibrating diaphragm.

[0027] Figure 2 It is another structural diagram of the conductive composite layer 10 of the ultra-thin conductive vibrating diaphragm.

[0028] Figure 3 It is still another structural diagram of the conductive composite layer 10 of the ultra-thin conductive vibrating diaphragm.

[0029] Figure 4 Another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present application.

[0030] Figure 5 Another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present application.

[0031] Figure 6 Another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present application.

[0032] Figure 7 Another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present application.

[0033] Figure 8 Another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present application.

[0034] Figure 9 A sectional view of the inner copper foil part and the insulating film of the ultra-thin conductive diaphragm according to the present application.

[0035] Figure 10 Another structural schematic diagram of the ultra-thin conductive diaphragm according to the present application.

[0036] Figure 11 Another structural schematic diagram of the ultra-thin conductive diaphragm according to the present application.

[0037] Figure 12 Another structural schematic diagram of the ultra-thin conductive diaphragm according to the present application. DETAILED DESCRIPTION

[0038] In order to make the invention purpose, technical scheme and technical effect of the present application more clear, the present application will be further described in conjunction with specific embodiments. It should be understood that the specific embodiments and related drawings described herein are only used to explain the present application, and are not used to limit the present application.

[0039] Referring to Figures 1-8 An ultra-thin conductive diaphragm, comprising a conductive composite layer 10, the conductive composite layer comprising an outer conductive part 13, an inner copper foil part 12, a connecting part 14, and an insulating film 11 adhered to the connecting part 14. The outer conductive part 13 is provided with at least one inner copper foil part 12, and the connecting part 14 connects the outer conductive part 13 and the inner copper foil part 12.

[0040] Referring to Figures 1-4The outer conductive part 13 is in the shape of a dot, a sheet, a long strip or a ring; and the inner copper foil part 12 is in the shape of a dot, a sheet, a long strip or a ring. It should be understood that the outer conductive part 13 and the inner copper foil part 12 described in the present application can achieve electrical conduction, and their shapes and structures can be changed arbitrarily according to the design needs of users, so as to meet the requirements of different products.

[0041] In the present application, the number and arrangement of the inner copper foil part 12 can be set according to the needs of use. For example, in the embodiment shown in Figure 4 , the inner copper foil part 12 is one. The ultra-thin conductive diaphragm shown in the embodiment is used for a single magnetic circuit loudspeaker. In the embodiment shown in Figure 6 , the inner copper foil part 12 is set to two. Figure 6 The ultra-thin conductive diaphragm 10 of the embodiment shown in Figure 7 is used for a double magnetic circuit loudspeaker.

[0042] The ultra-thin conductive diaphragm 10 described in the present application also includes positive and negative electrode pads 15. In some embodiments of the present application, as shown in Figure 1 and Figure 4 , the positive and negative electrode pads 15 are a group and are arranged on the inner copper foil part 12. In other embodiments of the present application, as shown in Figure 6 , the positive and negative electrode pads 15 are two groups. The positive and negative electrode pads 15 are two copper foil sheets extending from the inner copper foil part 12 and connecting the two inner copper foil parts 12, and the positive and negative electrode pads 15 are provided with positive and negative electrode welding points. It should be understood that the number and position of the positive and negative electrode pads 15 can be flexibly set according to needs, and the present application does not limit this.

[0043] The positive and negative electrode pads 15 are connected with the positive and negative poles of a voice coil, thereby avoiding the use of voice coil leads. On the one hand, this structure solves the technical problem that the voice coil leads are broken due to the vibration of the diaphragm, thereby reducing the service life of the loudspeaker. On the other hand, in the production process of the ultra-thin conductive diaphragm, the voice coil is directly connected with the positive and negative electrode pads 15 during the process of installing the voice coil on the diaphragm, thereby facilitating the installation.

[0044] In other embodiments of the present application, as shown in Figure 6 , the outer conductive part 13 is provided with a wire welding point 16, and the power supply wire is directly welded at the wire welding point 16, thereby avoiding the power supply wire passing through the ultra-thin conductive diaphragm, and avoiding the loudspeaker losing sound due to the breakage of the power supply wire, thereby improving the quality of the loudspeaker. It should be understood that the wire welding point 16 can be arranged at any position of the outer conductive part 13. Figure 3In the shown embodiment, the wire soldering point 16 is arranged at the end of the outer conductive part 13, which makes the installation of the power supply wire more convenient compared to arranging the wire soldering point at other positions. In the shown embodiment, the wire soldering point 16 is arranged at the end of the outer conductive part 13. Figure 5 In the shown embodiment, the end of the outer conductive part 13 is provided with an extension, and the wire soldering point 16 is arranged on the extension.

[0045] The ultra-thin conductive diaphragm can be square or rectangular as shown in Figure 4 and Figure 6 or circular as shown in Figure 5 or other shapes. The shape of the ultra-thin conductive diaphragm is not limited in the present application.

[0046] In some embodiments of the present application, the thickness of the inner copper foil part is generally between 2um and 135um, and the material of the inner copper foil part is rolled copper foil, copper foil, copper, conductive glue, etc. The rolled copper foil has the characteristics of high strength, bending, ductility, electroplating, and good conductivity.

[0047] In some embodiments of the present application, the inner copper foil part is connected to the insulating film by an adhesive. The adhesive is a conventional adhesive in the art, such as glue.

[0048] In some embodiments of the present application, the connecting part 14 is in the shape of ∑, M, W, S, I, or wave, etc. It should be understood that the shape of the connecting part 14 can be arranged as needed, as long as it meets the requirement of connecting the inner copper foil part 12 and the conductive ring 13 at both ends, so that they can form an electrically conductive path. Any change in the shape of the connecting part 14 shall be deemed within the protection scope defined in the claims of the present application, without departing from the basic concept of the present application.

[0049] The connecting part 14 also has the function of balancing and supporting the diaphragm, preventing the diaphragm from losing balance and causing distortion or noise when vibrating due to insufficient diaphragm support and rebound force, especially when the M (vibration mass) is large. The traditional membrane C (elastic coefficient) cannot well control the movement of the voice coil piston, it is difficult to reduce F0 (the lowest resonance frequency) to widen the low frequency, and the vibration amplitude is suppressed, so the speaker cannot bear large power.

[0050] The number, shape, material, thickness, and width of the connecting part 14 all affect the sound characteristics. Generally, the material of the connecting part is a conductive metal material, such as copper foil, copper alloy, etc. The thickness of the connecting part is preferably 0.05-1mm, and the width of the connecting part is preferably 0.05-3mm. The thicker and wider the connecting part is, the stronger the support force is, the higher the F0 (the lowest resonance frequency) is, and the smaller the distortion is. The softer the material of the connecting part is, the smaller the size is, and the larger the amplitude is.

[0051] In some embodiments of the present application, the outer conductive part 13 is made of conductive metal material, preferably copper foil.

[0052] Referring to Figure 9 In some embodiments of the present application, the upper and lower sides of the connecting part 14 are respectively adhered with the insulating film, or only the upper side or the lower side is adhered with the insulating film.

[0053] In some embodiments of the present application, the upper and lower sides of the copper foil ring 12 are respectively covered and adhered with the insulating film 11. The insulating film 11 is fully spread and adhered to each other in the ring of the copper foil ring 12. The insulating film provides support for the inner copper foil part 12 in the ultra-thin conductive diaphragm, and the inner copper foil part 12 also ensures the flatness and tension of the insulating film, prevents the insulating film from wrinkling, relaxing and deforming, and reduces sound distortion. The thickness of the insulating film in the ultra-thin conductive diaphragm is 3-6um, and the thickness of the copper foil is 2-6um. Compared with the traditional aluminum foil, the thickness and weight of the ultra-thin conductive diaphragm are greatly reduced, thereby providing a basis for the development of thinner and lighter speakers. The insulating film 11 is adhered to the periphery of the inner copper foil part 12 by glue, and the remaining part is adhered together by glue.

[0054] In some embodiments of the present application, the upper and lower sides of the copper foil ring 12 are respectively covered and adhered with the insulating film 11. The insulating film 11 is fully spread and adhered to each other in the ring of the copper foil ring 12. The insulating film provides support for the inner copper foil part 12 in the ultra-thin conductive diaphragm, and the inner copper foil part 12 also ensures the flatness and tension of the insulating film, prevents the insulating film from wrinkling, relaxing and deforming, and reduces sound distortion. The thickness of the insulating film in the ultra-thin conductive diaphragm is 3-6um, and the thickness of the copper foil is 2-6um. Compared with the traditional aluminum foil, the thickness and weight of the ultra-thin conductive diaphragm are greatly reduced, thereby providing a basis for the development of thinner and lighter speakers. The insulating film 11 is adhered to the periphery of the inner copper foil part 12 by glue, and the remaining part is adhered together by glue.

[0055] In some embodiments of the present application, the insulating film is a single-layer film or a 2-5 layer composite film, and each layer is bonded by adhesive. The material of each layer is selected from, but not limited to, polyethylene terephthalate (PET), polyether ether ketone (PEEK), polyether amine (PEA), polyethylene naphthalate (PEN), polyurethane (PU), and polyether imide (PEI). Among them, the PET material has poor toughness and low temperature resistance, and the thickness is 3-10um. The PEEK material has the characteristics of high temperature resistance, self-lubrication, wear resistance and fatigue resistance, and the thickness is 2-8um. The PEN material has good heat resistance and film strength, and the thickness is 2-5um. The PU material has high strength, tear resistance and wear resistance, and the thickness is 10-35um.

[0056] The production process of the composite film is to coat the single-layer film with adhesive and bond by hot pressing. The single-layer film or the composite film is coated with adhesive, bonded with the inner copper foil part by hot pressing, and then a frame is welded outside the inner copper foil part. After molding, the ultra-thin conductive diaphragm is obtained by punching.

[0057] The connecting part is also provided with an elastic layer. The material of the elastic layer is metal, plastic, carbon fiber or glass fiber. The elastic layer is located between the connecting part and the insulating film, or outside the insulating film.

[0058] As shown in Figures 10-12 , the ultra-thin conductive diaphragm further comprises a diaphragm which is adhered to the conductive composite layer 10 by hot pressing and cutting after molding to form the ultra-thin conductive diaphragm. The diaphragm has a diaphragm middle part 21, the edge of which is adhered to the periphery of the insulating film 11 on one side. The periphery of the diaphragm middle part 21 further extends a diaphragm R edge 22 which is bulged between the outer conductive part 13 and the inner copper foil part 12, the outer edge of which is adhered to the outer conductive part 13. The diaphragm part 21 and the diaphragm R edge 22 are integrally molded or separately molded and adhered together by adhesive.

[0059] The material of the diaphragm is plastic, cloth, silk, rubber or foamed material. When the material of the diaphragm is plastic, it includes PEI, PET, PEN, PEEK, PMI or PU, etc.

[0060] As shown in Figure 11 and Figure 12 , alternatively, the edge of the diaphragm middle part 21 is adhered to the periphery of the insulating film 11 on one side, the middle part being bulged in convex shape, or as shown in Figure 10 , being flatly adhered to the insulating film 11. The diaphragm R edge 22 can also be provided as a single bulged part or multiple continuous bulged parts.

[0061] When the diaphragm middle part 21 is bulged in convex shape, the diaphragm has smaller rigidity and low frequency sound cross-over, which is suitable for high frequency.

[0062] When the diaphragm middle part 21 is flatly adhered to the insulating film 11, a body 24 is provided thereon. The body 24 increases the rigidity of the ultra-thin conductive diaphragm, which can be applied to full frequency sound.

[0063] The body 24 is of wood, metal material, plastic material, glass fiber material, carbon fiber material, cloth, rubber material or plastic, etc. The metal is aluminum, copper, titanium and their alloys, etc. The plastic is PEI, PET, PEN, PEEK, PMI or PU, etc. The diaphragm part and the diaphragm R edge can also be a composite structure of two layers of the above materials.

[0064] The diaphragm R edge 22 further has a frame 23 on the outside, which is adhered to the outer conductive part 13 by adhesive. The frame 23 can be a hard frame or a soft frame. When the frame is a hard frame, its material is metal, plastic, wood, glass fiber or carbon fiber. When the frame is a soft frame, its material is rubber, PU, etc.

[0065] In some other embodiments of the present application, a speaker with the above-mentioned ultra-thin conductive diaphragm is provided. The speaker can be a single-magnetic speaker, a double-magnetic speaker or a multi-magnetic speaker. When the speaker is a single-magnetic speaker, the ultra-thin conductive diaphragm has only one inner copper foil portion 12, or although there are two or more inner copper foil portions, only one inner copper foil portion has a voice coil welded thereon. Referring to Figure 4 When the speaker is a double-magnetic speaker, the ultra-thin conductive diaphragm 10 has at least two inner copper foil portions 2, and a voice coil is welded on each of the two inner copper foil portions 12. It should be understood that the speaker of the present application has a general conventional speaker structure, which is a common knowledge for those skilled in the art, and thus will not be described herein.

[0066] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For those skilled in the art to which the present application belongs, the structure of the present application can be flexible and variable, and a series of products can be derived without departing from the concept of the present application. Any simple deduction or replacement should be regarded as falling within the scope of the patent protection determined by the claims submitted.

Claims

1. An ultrathin conductive diaphragm comprising a conductive composite layer; characterized in that, The conductive composite layer comprises an outer conductive part, an inner copper foil part, a connecting part, and an insulating film adhered to the connecting part; at least one inner copper foil part is arranged in the outer conductive part, the connecting part connects the outer conductive part and the inner copper foil part, and the insulating film covers and adheres to the upper side or / and lower side of the connecting part respectively; The conductive composite layer further comprises at least one set of positive and negative electrode welding points; the positive and negative electrode welding points are arranged on the inner copper foil part, between the two inner copper foil parts, or on two copper foil sheets extending from the inner copper foil part and connecting the two inner copper foil parts; Further comprising a diaphragm, which is adhered to the conductive composite layer; the diaphragm has a diaphragm middle part, the edge of which is adhered to the inner copper foil part on one side; the edge of the diaphragm middle part further extends to a diaphragm R edge, the middle part of which is bulged between the outer conductive part and the inner copper foil part, and the outer edge of which is adhered to the outer conductive part.

2. The ultra-thin conductive diaphragm of claim 1, wherein, The outer conductive part is in the shape of a dot, a sheet, a long strip, or a ring; the inner copper foil part is in the shape of a dot, a sheet, a long strip, or a ring.

3. The ultra-thin conductive diaphragm of claim 1, wherein, The outer conductive part is provided with a wire welding point; the wire welding point is arranged on the end part of the outer conductive part, or on the extension part extending from the end part of the outer conductive part.

4. The ultra-thin conductive diaphragm of claim 1, wherein, The connecting part is in the shape of ∫, S, M, W, I, or wave.

5. The ultra-thin conductive diaphragm of claim 1, wherein, The material of the connecting part is conductive metal, the thickness of the connecting part is 0.05-1 mm, and the width of the connecting part is 0.05-3 mm.

6. The ultra-thin conductive diaphragm of claim 1, wherein, The insulating film is a single-layer film or a 2-5 layer composite film, and each layer is bonded by adhesive.

7. The ultra-thin conductive diaphragm of claim 1, wherein, The material of the insulating film is selected from one or several of polyethylene terephthalate (PET), polyether ether ketone (PEEK), polyether amine (PEA), polyethylene naphthalate (PEN), polyurethane (PU), or polyether imide (PEI).

8. The ultra-thin conductive diaphragm according to claim 1, wherein, The connecting part is further provided with an elastic layer; the material of the elastic layer is selected from one or several of metal, plastic, carbon fiber, or glass fiber; the elastic layer is located between the connecting part and the insulating film, or outside the insulating film.

9. The ultra-thin conductive diaphragm of claim 1, wherein, The material of the diaphragm is plastic, cloth, silk, rubber, or foaming material; the plastic is selected from PEI, PET, PEN, PEEK, PMI, or PU.

10. The ultra-thin conductive diaphragm of claim 1, wherein, The diaphragm middle part is bulged in convex shape, or is flatly attached to the insulating film.

11. The ultra-thin conductive diaphragm of claim 10, wherein, When the diaphragm middle part is flatly attached to the insulating film, a body is adhered thereto.

12. The ultra-thin conductive diaphragm of claim 11, wherein, The body is made of wood, metal, plastic, glass fiber, carbon fiber, cloth, or rubber; the metal is aluminum, copper, titanium, and alloys thereof, and the plastic is PEI, PET, PEN, PEEK, PMI, or PU.

13. The ultra-thin conductive diaphragm of claim 9, wherein, The diaphragm R edge is arranged as a single bulge or multiple continuous bulges.

14. A loudspeaker having the ultrathin conductive diaphragm according to any one of claims 1-13.

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