WO2021063110A1

WO2021063110A1 - Ultrathin conductive vibration diaphragm and loudspeaker

Info

Publication number: WO2021063110A1
Application number: PCT/CN2020/108413
Authority: WO
Inventors: 朱达云
Original assignee: 朱达云
Priority date: 2019-09-30
Filing date: 2020-08-11
Publication date: 2021-04-08
Also published as: CN110691305A

Abstract

The present invention provides an ultrathin conductive vibration diaphragm, comprising a conductive composite layer. The conductive composite layer comprises an outer conductive portion, an inner copper foil portion, a connection portion, and an insulating film adhered on the connection portion; at least one inner copper foil portion is provided in the outer conductive portion; the connection portion connects the outer conductive portion with the inner copper foil portion; the insulating film covers and is separately adhered on the upper side surface and/or the lower side surface of the connection portion. In the ultrathin conductive vibration diaphragm of the present invention, a positive electrode pad and a negative electrode pad are provided in the middle part of an inner copper foil, and a voice coil can be directly connected to the positive electrode pad and the negative electrode pad, thereby avoiding using a voice coil lead wire, preventing a loudspeaker from being damaged due to the breakage of the voice coil lead wire, and prolonging the service life of the loudspeaker.

Description

Ultra-thin conductive diaphragm and loudspeaker

Technical field

The invention relates to the technical field of loudspeakers, in particular to an ultra-thin conductive diaphragm and loudspeakers.

Background technique

Conventional loudspeaker structures generally include magnets, U-shaped irons, paper cones, voice coils, sound films, bouncing waves, and so on. The existing loudspeakers are relatively large and thick, and the voice coil leads are easily broken, resulting in a relatively short life span of the loudspeaker, which cannot meet people's needs. For example, Chinese Patent Document CN201720323750.1 discloses a miniature loudspeaker, including a housing containing a vibration component and a magnetic circuit component. The vibration component includes a diaphragm and a voice coil coupled below the diaphragm. The voice coil has a lead wire. A buffer spring pad is arranged between the electrical connection end of the lead wire and the lead-out end near the electrical connection end of the lead wire, and the buffer spring pad is fixed on the shell and wraps and clamps the lead wire. Since a buffer spring pad is arranged between the electrical connection end and the lead-out end to wrap and clamp the lead, the vibration transmitted 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 , Which greatly extends the vibration life of the lead. The cushion spring is arranged close to the electrical connection end of the lead, and while isolating the vibration, it will not interfere with the vibration of the voice coil. Therefore, while improving the reliability of the micro speaker, it will not affect its acoustic performance.

In the loudspeaker, the voice coil is connected to the solder joint through the voice coil lead in a conventional structure. However, during the rotation of the voice coil, the lead wire vibrates and is easily broken, causing damage to the speaker and reducing the service life of the speaker.

In addition, with the development of technology, electronic devices in daily life are becoming lighter, thinner, and smaller. This also requires people to reduce the thickness of speakers and produce thinner and lighter products.

Summary of the invention

In order to overcome the shortcomings of the prior art, the present invention provides an ultra-thin conductive diaphragm and a speaker with the conductive diaphragm, which solves the problem that the voice coil lead of the existing speaker is easily broken and the speaker has a relatively low lifetime.

The technical scheme of the present invention is based on the following: an ultra-thin conductive diaphragm, including a conductive composite layer; the conductive composite layer includes an outer conductive portion, an inner copper foil portion, a connecting portion, and an insulating film adhered to the connecting portion The outer conductive portion is provided with at least one inner copper foil portion, the connecting portion connects the outer conductive portion and the inner copper foil portion, and the insulating film covers and adheres to the connecting portion respectively Side or/and lower side.

The outer conductive part is in the shape of dots, sheets, strips or rings; the inner copper foil part is in the shape of dots, sheets, strips or rings.

The conductive composite layer also includes 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 portion, or between the two inner copper foil portions, or from the inner copper foil portion Extend and connect to the two copper foil pieces of the two inner copper foil parts.

The outer conductive part is provided with a wire welding point; the wire welding point is arranged on an end of the outer conductive part or an extension part extending from the end of the outer conductive part.

The connecting portion has a ∫ shape, an S shape, an M shape, a W shape, an I shape or a wave shape.

The material of the connection part is conductive metal, the thickness of the connection part is 0.05-1 mm, and the width of the connection part is 0.05-3 mm.

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

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

The connecting portion is also provided with an elastic layer; the elastic layer is made of metal, plastic, carbon fiber or glass fiber; the elastic layer is located between the connecting portion and the insulating film, or on the outside of the insulating film.

The ultra-thin conductive diaphragm further includes a diaphragm, the diaphragm and the conductive composite layer are bonded together; the diaphragm has a middle part of the diaphragm, and the edge of the middle part of the diaphragm is adhered to one side The inner copper foil portion; the edge of the middle portion of the diaphragm also extends out of the edge of the diaphragm R, and the middle portion of the edge of the diaphragm R bulges between the outer conductive portion and the inner copper foil portion, Its outer edge is adhered to the outer conductive part.

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

The middle part of the vibrating membrane bulges in a convex shape, or is attached to the insulating membrane in a plane.

When the middle part of the diaphragm is flatly attached to the insulating film, a carcass is adhered to it.

The carcass is wood, metal, plastic, glass fiber, carbon fiber, cloth or rubber; wherein the metal is light metal such as aluminum, copper, titanium and their alloys, and the plastic is PEI, PET, PEN, PEEK, PMI or PU.

The R side of the diaphragm is configured as a single bulge or multiple continuous bulges.

A speaker having the above-mentioned ultra-thin conductive diaphragm.

The beneficial effects of the present invention are: the ultra-thin conductive diaphragm according to the present invention includes a conductive composite layer; the conductive composite layer includes an outer conductive part, an inner copper foil part, a connecting part, and an adhesive attached to the connecting part. Insulating film; the outer conductive portion is provided with at least one inner copper foil portion, the connecting portion connects the outer conductive portion and the inner copper foil portion, the insulating film covers and adheres to the connecting portion respectively The upper side or/and the lower side. When the ultra-thin conductive diaphragm is used to produce speakers, the inner copper foil is provided with positive and negative solder joints, and the voice coil can be directly connected to the positive and negative solder joints, thereby avoiding the use of voice coil leads and preventing The speaker is damaged due to the broken voice coil lead, which improves the service life of the speaker. In terms of production, the application of the ultra-thin conductive diaphragm also simplifies the production process of the speaker and reduces the production cost. The connecting part is not only a conductive function, but also a balanced support for the diaphragm, preventing insufficient support and resilience of the diaphragm to cause the diaphragm to lose balance when vibrating and cause distortion or noise, especially in M (vibration quality) When the diaphragm C (elasticity coefficient) is large, it cannot control the voice coil as the piston movement, and it is difficult to reduce the F0 to broaden the low frequency, and suppress the vibration amplitude to increase the speaker power. The connecting part also has the function of enhancing the rigidity of the vibrating diaphragm carcass part, which can effectively suppress the distortion caused by the split vibration.

In addition, the ultra-thin conductive diaphragm described in the present application eliminates the voice coil lead, which not only reduces the product height, but also avoids the product defect rate caused by the voice coil lead.

The ultra-thin conductive diaphragm can be mass-produced on a large scale, which improves the consistency and yield of products.

The ultra-thin conductive diaphragm can be provided with a plurality of inner copper foil parts, and relatively can also form a multi-magnetic circuit array, which greatly improves the sensitivity of the product.

Description of the drawings:

FIG. 1 is a schematic diagram of the structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

FIG. 2 is another structural diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present invention.

FIG. 3 is a schematic diagram of another structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

FIG. 4 is a schematic diagram of another structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

FIG. 5 is another structural schematic diagram of the conductive composite layer 10 of the ultra-thin conductive diaphragm according to the present invention.

FIG. 6 is a schematic diagram of another structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

FIG. 7 is a schematic diagram of another structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

FIG. 8 is a schematic diagram of another structure of the conductive composite layer 10 of the ultra-thin conductive diaphragm of the present invention.

Fig. 9 is a cross-sectional view of the inner copper foil portion and the insulating film of the ultra-thin conductive diaphragm of the present invention.

FIG. 10 is a schematic diagram of another structure of the ultra-thin conductive diaphragm of the present invention.

FIG. 11 is a schematic diagram of another structure of the ultra-thin conductive diaphragm of the present invention.

Fig. 12 is a schematic diagram of another structure of the ultra-thin conductive diaphragm of the present invention.

Detailed ways

In order to make the objectives, technical solutions and technical effects of the present invention clearer and clearer, the present invention will be further described below in conjunction with specific embodiments. It should be understood that the specific embodiments and related drawings described here are only used to explain the present invention, but not to limit the present invention.

1 to 8, an ultra-thin conductive diaphragm, including a conductive composite layer 10, the conductive composite layer includes an outer conductive portion 13, an inner copper foil portion 12, a connecting portion 14, and adhered to the connecting portion 14 On the insulating film 11. At least one inner copper foil portion 12 is provided in the outer conductive portion 13, and the connecting portion 14 connects the outer conductive portion 13 and the inner copper foil portion 12.

1 to 4, the outer conductive portion 13 is in the shape of a dot, sheet, strip or ring; the inner copper foil portion 12 is in the shape of a dot, sheet, strip or ring. It should be understood that the outer conductive portion 13 and the inner copper foil portion 12 of the present application only need to be able to achieve electrical conduction, and their shape and structure can be arbitrarily changed according to the user's design needs, so as to meet the requirements of different products.

In this application, the number and arrangement of the inner copper foil portions 12 can be set according to the needs of use. For example, in the embodiment shown in FIG. 4, the number of the inner copper foil portion 12 is one. The ultra-thin conductive diaphragm shown in this embodiment is used for a single magnetic circuit speaker. In the embodiment shown in FIG. 6, there are two inner copper foil portions 12. The ultra-thin conductive diaphragm 10 of the embodiment shown in FIG. 6 is used for a dual magnetic circuit speaker. In the embodiment shown in FIG. 7, there are four inner copper foil portions 12. It should be understood that the inner copper foil portion 12 can also be provided with more as required. A voice coil can be mounted on each of the inner copper foil portions 12.

The ultra-thin conductive diaphragm 10 of the present invention further includes positive and negative electrode pads 15. In some embodiments of the present invention, as shown in FIG. 1 and FIG. 4, the positive and negative electrode pads 15 are a group and are arranged on the inner copper foil portion 12. In other embodiments of the present invention, as shown in FIG. 6, the positive and negative electrode pads 15 are two groups. The positive and negative electrode pads 15 are two copper foil pieces extending from the inner copper foil portion 12 and connecting the two inner copper foil portions 12, and positive and negative electrode welding points are provided on them. It should be understood that the number and positions of the positive and negative electrode pads 15 can be flexibly set according to needs, which is not limited in the present invention.

The positive and negative electrode welding pads 15 are connected to the positive and negative electrodes 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 lead vibrates along with the diaphragm, which causes the voice coil lead to break and reduces the speaker's service life. On the other hand, during the production process of the ultra-thin conductive diaphragm, the voice coil is directly connected to the positive and negative electrode pads 15 during the process of installing the voice coil on the diaphragm, which is convenient for installation.

In other embodiments of the present invention, as shown in FIG. 6, the outer conductive portion 13 is provided with a wire welding point 16, and the power wire is directly welded to the wire welding point 16, so as to prevent the power wire from passing through the super The thin conductive diaphragm also avoids the loss of sound of the speaker due to the break of the power wire, thereby improving the quality of the speaker. It should be understood that the wire welding point 16 may be arranged at any position of the outer conductive portion 13. In the embodiment shown in FIG. 3, the wire welding point 16 is arranged at the end of the outer conductive part 13, which makes the installation of the power wire more convenient compared with other positions. In the implementation shown in FIG. 5, the end of the outer conductive portion 13 has an extension to the outside, and the wire welding point 16 is provided on the extension.

The ultra-thin conductive diaphragm may be square or rectangular as shown in FIG. 4 and FIG. 6, or it may be round as shown in FIG. 5, or other shapes. The application does not uniquely limit the shape of the ultra-thin conductive diaphragm.

In some embodiments of the present invention, 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 adhesive, etc. Among them, rolled copper foil has the characteristics of high strength, flexibility, ductility, electroplating, and good conductivity.

In some embodiments of the present invention, the inner copper foil portion and the insulating film are connected by an adhesive. The adhesive is a conventional adhesive in the field, such as glue.

In some embodiments of the present invention, the connecting portion 14 has a ∫ shape, an M shape, a W shape, an S shape, an I shape or a wave shape and so on. It should be understood that the shape of the connecting portion 14 can be set as required, as long as the two ends are connected to the inner copper foil portion 12 and the conductive ring 13 so that the two can be electrically connected. Without departing from the basic concept of the present invention, any change in the shape of the connecting portion 14 should be regarded as falling within the protection scope defined by the claims of the present invention.

The connecting portion 14 also has the function of supporting the diaphragm in a balanced manner, preventing the following diaphragm from being insufficiently supported and resilient, causing the diaphragm to lose its balance when vibrating, causing distortion or noise, especially when the M (vibration mass) is large. Diaphragm C (elasticity coefficient) cannot well control the movement of the voice coil bearing piston, and it is difficult to reduce F0 (lowest resonance frequency) to broaden the low frequency, and suppress the vibration amplitude to increase the speaker power.

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

In some embodiments of the present invention, the material of the outer conductive portion 13 is a conductive metal material, preferably copper foil.

Referring to FIG. 9, in some embodiments of the present invention, the upper and lower sides of the connecting portion 14 are respectively adhered with the insulating film, or only the upper side or the lower side is adhered with the insulating film.

In some embodiments of the present invention, the peripheries of the upper and lower sides of the copper foil ring 12 are respectively covered and adhered to the insulating film 11. In the ring of the copper foil ring 12, the insulating film 11 is spread and bonded to each other. In the ultra-thin conductive diaphragm described in the present application, the insulating film provides support for the inner copper foil portion 12, and the inner copper foil portion 12 also ensures the flatness and tension of the insulating film, preventing The insulation film is wrinkled, slack and deformed, reducing sound distortion. In the ultra-thin conductive diaphragm, the thickness of the insulating film is 3-6um, and the thickness of the copper foil is 2-6um. Compared with the traditional aluminum foil elastic wave, the ultra-thin conductive diaphragm greatly reduces the thickness and weight of the elastic wave, thereby providing a foundation for the speaker to be thinner and lighter. The insulating film 11 is adhered to the periphery of the inner copper foil portion 12 by glue, and the remaining parts are adhered together by glue.

In other embodiments of the present invention, only one side of the inner copper foil portion 12 covers and adheres to the insulating film.

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

The production process of the composite film is to coat a single-layer film with an adhesive, which is obtained by thermocompression bonding. The single-layer film or the composite film is coated with an adhesive, bonded with the inner copper foil part by hot pressing, and then the frame is welded outside the inner copper foil part, formed and punched to obtain the ultra-thin conductive diaphragm.

An elastic layer is also provided on the connecting portion. The elastic layer is made of metal, plastic, carbon fiber or glass fiber. The elastic layer is located between the connecting portion and the insulating film, or located outside the insulating film.

As shown in FIGS. 10-12, the ultra-thin conductive diaphragm also includes a diaphragm, and the diaphragm and the conductive composite layer 10 are bonded together by hot pressing, and after forming, punching to form the ultra-thin Conductive diaphragm. The diaphragm has a middle portion 21 of the diaphragm, and the edge of the middle portion 21 of the diaphragm is adhered to the periphery of the insulating film 11 on one side. The diaphragm R side 22 is also extended from the periphery of the middle portion 21 of the diaphragm. The diaphragm R side 22 bulges between the outer conductive portion 13 and the inner copper foil portion 12, and the outer edge is adhered to the The outer conductive portion 13 is on. The diaphragm portion 21 and the R side 22 of the diaphragm are integrally formed or separated separately, and are bonded together by an adhesive.

The material of the diaphragm is plastic, cloth, silk, rubber or foam material. Wherein, when the material of the diaphragm is a plastic material, it includes PEI, PET, PEN, PEEK, PMI or PU.

As shown in FIGS. 11 and 12, optionally, the edge of the middle portion 21 of the diaphragm is adhered to the periphery of the insulating film 11 on one side, and the middle portion is convexly swollen, or as shown in FIG. , Attached to the insulating film 11 in a plane. The diaphragm R side 22 can also be configured as a single bulge or multiple continuous bulges.

When the middle part 21 of the diaphragm bulges in a convex shape, the rigidity of the diaphragm is small, and low-frequency sound effects are crossed, which is suitable for high-frequency.

When the middle portion 21 of the diaphragm is attached to the insulating film 11 in a plane, a carcass 24 is provided thereon. The carcass 24 increases the rigidity of the ultra-thin conductive diaphragm and can be suitable for full-range audio.

The carcass 24 is made of wood, metal, plastic, glass fiber, carbon fiber, cloth, rubber, or plastic. Among them, the metals are light metals such as aluminum, copper, titanium and their alloys, and the plastics are PEI, PET, PEN, PEEK, PMI or PU. The diaphragm portion and the R side of the diaphragm may also be a composite structure in which the above materials are bonded to two layers.

The outer side of the diaphragm R side 22 is further provided with a frame 23, and the frame 23 and the outer conductive portion 13 are adhered by an adhesive. The frame 23 may 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.

In other embodiments of the present invention, a speaker with the above-mentioned ultra-thin conductive diaphragm is provided. The speaker may be a single magnetic speaker, a dual 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 part 12, or although there are two or more inner copper foil parts, only one inner copper foil part is welded There is a voice coil. 4, when the speaker is a dual magnetic speaker, the ultra-thin conductive diaphragm 10 has at least two inner copper foil portions 2, and the two inner copper foil portions 12 are both welded with voice coils. It should be understood that the speaker of the present invention has a general conventional speaker structure, which is common knowledge that should be known to those skilled in the art, and the present invention will not be repeated here.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, its architecture can be flexible and changeable, and series products can be derived. Just making a few simple deductions or substitutions should be regarded as belonging to the patent protection scope of the present invention as determined by the submitted claims.

Claims

The ultra-thin conductive diaphragm includes a conductive composite layer; it is characterized in that the conductive composite layer includes an outer conductive portion, an inner copper foil portion, a connecting portion, and an insulating film adhered to the connecting portion; the outer conductive portion At least one inner copper foil portion is provided inside, the connecting portion connects the outer conductive portion and the inner copper foil portion, and the insulating film covers and adheres to the upper side or/and the lower side of the connecting portion, respectively .
The ultra-thin conductive diaphragm according to claim 1, wherein the outer conductive part is point-shaped, sheet-shaped, strip-shaped or ring-shaped; the inner copper foil part is point-shaped, sheet-shaped, long Strip or ring.
The ultra-thin conductive diaphragm according to claim 1, wherein 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, or two Between the inner copper foil portions or on two copper foil pieces extending from the inner copper foil portion and connecting the two inner copper foil portions.
The ultra-thin conductive diaphragm according to claim 1, wherein the outer conductive part is provided with a wire welding point; the wire welding point is provided at an end of the outer conductive part, or from the outer conductive part. The end of the conductive part extends from the extension part.
The ultra-thin conductive diaphragm according to claim 1, wherein the connecting portion has a ∫ shape, an S shape, an M shape, a W shape, an I shape or a wave shape.
The ultra-thin conductive diaphragm according to claim 1, wherein the connection part is made of conductive metal, the thickness of the connection part is 0.05-1 mm, and the width of the connection part is 0.05-3 mm.
The ultra-thin conductive diaphragm according to claim 1, wherein the insulating film is a single-layer film or a 2-5 layer composite film, and each layer is bonded by an adhesive.
The ultra-thin conductive diaphragm according to claim 1, wherein the material of the insulating film is selected from the group consisting of polyethylene phthalate (PET), polyether ether ketone (PEEK), and polyether amine (PEA) , One or more of polyethylene naphthalate (PEN), polyurethane (PU) or polyether imide (PEI).
The ultra-thin conductive diaphragm according to claim 1, wherein an elastic layer is further provided on the connecting portion; the material of the elastic layer is selected from one or more of metal, plastic, carbon fiber or glass fiber The elastic layer is located between the connecting portion and the insulating film, or located outside the insulating film.
The ultra-thin conductive diaphragm according to any one of claims 1-9, further comprising a diaphragm, the diaphragm and the conductive composite layer are bonded together; the diaphragm has a central portion of the diaphragm , The edge of the middle part of the diaphragm is adhered to the inner copper foil part on one side; the edge of the middle part of the diaphragm also extends out of the edge of the diaphragm R, and the middle part of the edge of the diaphragm R bulges in the Between the outer conductive part and the inner copper foil part, the outer edge is adhered to the outer conductive part.
The ultra-thin conductive diaphragm according to claim 10, wherein the material of the diaphragm is plastic, cloth, silk, rubber or foamed material; wherein the plastic is selected from PEI, PET, PEN, PEEK, PMI Or PU.
The ultra-thin conductive diaphragm of claim 10, wherein the middle of the diaphragm is convexly bulged, or is attached to the insulating film in a plane.
The ultra-thin conductive diaphragm according to claim 12, wherein when the middle part of the diaphragm is flatly attached to the insulating film, a carcass is adhered to it.
The ultra-thin conductive diaphragm according to claim 13, wherein the carcass is made of wood, metal, plastic, glass fiber, carbon fiber, cloth or rubber; wherein the metal is aluminum, copper, titanium and their alloys, plastic It is PEI, PET, PEN, PEEK, PMI or PU.
The ultra-thin conductive diaphragm according to claim 11, wherein the R side of the diaphragm is configured as a single bulge or multiple continuous bulges.
A loudspeaker having the ultra-thin conductive diaphragm according to any one of claims 1-15.