Diaphragm, sound production device and electronic equipment

Abstract

The utility model discloses a diaphragm, sound production device and electronic equipment relate to the technical field of electroacoustic transduction, the composite basin of this diaphragm includes integrally arranged dust cap and cone basin, and the outer periphery of cone basin is connected with the inside of the ring part of folding, wherein, dust cap and cone basin all include composite layer and the at least one adhesive layer of setting in one side of composite layer, and the side of composite layer back to adhesive layer is the front, and the side of adhesive layer back to composite layer is the back, and the composite layer is carbon fiber prepreg or aramid prepreg or mixed fiber prepreg. The utility model aims at providing a kind of diaphragm that effectively improves rigidity and damping performance, the diaphragm not only improves damping performance under the premise of guaranteeing rigidity, guarantees product hearing feeling, and effectively reduces distortion and other problems, but also can reduce assembly process, so that diaphragm is applied in sound production device can effectively improve the easy split vibration when high frequency sound production, and improve the assembly efficiency of sound production device.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transduction technology, and in particular to a diaphragm and a sound-generating device and electronic device using the diaphragm. Background Technology

[0002] In recent years, with the rapid development of consumer electronics, these products have gained widespread application and consumer acceptance. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used as speakers, earpieces, and headphones. As the performance of electronic products improves, the improvement of the acoustic performance of sound-generating devices is an inevitable trend.

[0003] A loudspeaker typically consists of a magnetic circuit system and a vibration system. When the voice coil of the vibration system is energized, it generates an induced magnetic field. This induced magnetic field interacts with the magnetic field of the magnetic circuit system to produce an upward or downward force, which drives the diaphragm of the vibration system to vibrate and push the air to produce sound.

[0004] In related technologies, loudspeaker diaphragms generally use a split cone design, meaning the dust cap and cone portion of the diaphragm are separate units. This typically requires two bonding processes during assembly, reducing assembly efficiency. Simultaneously, the surround portion of the diaphragm is usually made of a relatively flexible material, while the dust cap and cone portion are made of relatively rigid materials. The rigidity of the dust cap and cone portion prevents the diaphragm from experiencing split vibrations in the high-frequency range, improving the product's high-frequency sound performance. Ideally, the dust cap and cone portion should be lightweight and highly rigid. However, currently, the rigidity of the dust cap and cone portion of diaphragms is insufficient, and their damping is poor, leading to split vibrations during high-frequency sound production, thus affecting the product's sound quality. Utility Model Content

[0005] The main purpose of this utility model is to provide a diaphragm, a sound-generating device, and an electronic device. The aim is to provide a diaphragm that effectively improves rigidity and damping performance. This diaphragm not only improves damping performance and ensures the sound quality of the product while maintaining rigidity, but also effectively reduces distortion and other problems. It can also reduce assembly processes, so that the application of the diaphragm in the sound-generating device can effectively improve the split vibration that is prone to occur during high-frequency sound generation, and improve the assembly efficiency of the sound-generating device.

[0006] To achieve the above objectives, this utility model proposes a diaphragm for use in a sound-generating device. The diaphragm includes a folded ring portion and a composite basin disposed inside the folded ring portion. The composite basin includes an integrally formed dust cap and a conical basin. The outer periphery of the conical basin is connected to the inner side of the folded ring portion. The conical basin is inclined from the folded ring portion to the dust cap. The diaphragm has a front and a back that are opposite to each other. The front is the sound-emitting side. The dust cap and the cone both include a composite layer and at least one adhesive layer disposed on one side of the composite layer. The side of the composite layer facing away from the adhesive layer is the front, and the side of the adhesive layer facing away from the composite layer is the back. The composite layer is a carbon fiber prepreg, an aramid prepreg, or a mixed fiber prepreg.

[0007] In one embodiment, the composite layer is a layer of the carbon fiber prepreg, a layer of the aramid prepreg, or a layer of the mixed fiber prepreg; Alternatively, the composite layer may comprise multiple layers of the carbon fiber prepreg, multiple layers of the aramid prepreg, or multiple layers of the mixed fiber prepreg; wherein the multiple layers of the carbon fiber prepreg, multiple layers of the aramid prepreg, or multiple layers of the mixed fiber prepreg are formed into the composite layer by hot pressing.

[0008] In one embodiment, the carbon fiber prepreg is made of carbon fiber cloth, which is formed by any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the aramid prepreg is made of aramid fiber cloth, and the aramid fiber cloth is formed by any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the mixed fiber prepreg is made of mixed fiber cloth, which is woven from a first fiber and a second fiber. The first fiber is carbon fiber or aramid, and the second fiber is any one of carbon fiber, aramid, glass fiber, basalt fiber, PET fiber, PEN fiber, ceramic fiber, and thermoplastic fiber, and the first fiber and the second fiber are different. The mixed fiber cloth is woven using any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the thickness of the dust cap and the thickness of the cone are both greater than or equal to 0.2 mm.

[0009] In one embodiment, the ratio of the thickness of the adhesive layer located in the cone to the thickness of the composite layer located in the cone is 9% to 23%, and the ratio of the thickness of the adhesive layer located in the dust cap to the thickness of the composite layer located in the dust cap is 25% to 70%.

[0010] In one embodiment, the adhesive layer comprises two layers, namely a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is sandwiched between the composite layer and the second adhesive layer; The first adhesive layer is a plugging adhesive, and the second adhesive layer is a backing adhesive.

[0011] In one embodiment, the connection between the dust cap and the cone extends toward the rear side to form a groove, and the groove surrounds the dust cap; Wherein, the groove, the dust cap, and the cone are integral structures; and / or, the distance from the outer periphery of the dust cap to the inner periphery of the cone is defined as the width d1 of the groove, and the diameter of the outer periphery of the cone is defined as d2, 0.8%≤d1 / d2≤5%.

[0012] In one embodiment, the connection between the dust cap and the cone is provided with a plurality of tooth-shaped protrusions extending toward the rear side, and the plurality of tooth-shaped protrusions are spaced apart along the periphery of the dust cap; Wherein, the toothed protrusion is integrally formed with the dust cap and the cone basin; and / or, the number of toothed protrusions is 2 to 14; and / or, the ratio of the sum of the arc lengths of multiple toothed protrusions to the circumference of the circle they belong to is 40% to 90%; and / or, the angle of the central angle corresponding to each toothed protrusion is 5° to 180°; and / or, the width of the toothed protrusion is defined as W, where 1mm ≤ W ≤ 5mm.

[0013] In one embodiment, the line connecting the two ends of the cone basin to the folded ring and the dust cap respectively forms an angle θ with the plane containing the end face of the connection between the cone basin and the dust cap, and the angle θ ranges from 20° to 60°. And / or, the cone basin is formed by one or more arc segments from the folded ring portion to the dust cap.

[0014] This utility model also proposes a sound-generating device, the sound-generating device comprising: A magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap; and The vibration system includes the diaphragm and voice coil described above. The diaphragm is opposite to and spaced apart from the magnetic circuit system. One end of the voice coil is connected to the diaphragm, and the other end of the voice coil is correspondingly arranged with respect to the magnetic gap.

[0015] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0016] The diaphragm of this utility model is applied to a sound-generating device. By setting the diaphragm as a folded ring and a composite cone located inside the folded ring, and setting the composite cone as an integrally formed dust cap and cone, the outer periphery of the cone is connected to the inner side of the folded ring, so that the cone is inclined from the folded ring to the dust cap. This reduces the assembly steps and improves the assembly efficiency during diaphragm assembly. At the same time, by setting the composite cone of the diaphragm as a composite layer and at least one adhesive layer on one side of the composite layer, that is, both the dust cap and the cone are set as a composite layer and at least one adhesive layer, and the composite layer is made of carbon fiber prepreg or aramid prepreg, it not only effectively improves the rigidity of the composite cone and effectively extends the bandwidth, but also improves the damping performance while ensuring rigidity, improves the sound quality of the product, and effectively reduces distortion and other problems. Thus, when the diaphragm is applied to a sound-generating device, it can effectively improve the split vibration that is prone to occur during high-frequency sound generation and improve the assembly efficiency of the sound-generating device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A top view of an embodiment of the sound-generating device provided by this utility model; Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 for Figure 2 Enlarged view of point B in the middle; Figure 4 A top view of another embodiment of the sound-generating device provided by this utility model; Figure 5 for Figure 4 A cross-sectional view along the CC direction; Figure 6 for Figure 5 Enlarged view of point D in the middle; Figure 7 A partial cross-sectional schematic diagram of an embodiment of the composite basin provided by this utility model; Figure 8 A partial cross-sectional schematic diagram of another embodiment of the composite basin provided by this utility model; Figure 9 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model.

[0019] Explanation of icon numbers: 100. Diaphragm; 1. Surround section; 2. Composite cone; 21. Dust cap; 22. Cone cone; 23. Composite layer; 231. Carbon fiber prepreg; 232. Aramid prepreg; 24. Adhesive layer; 241. First adhesive layer; 242. Second adhesive layer; 25. Groove; 26. Toothed protrusion; 3. Front; 4. Back; 500. Vibration system; 510. Voice coil; 600. Magnetic circuit system; 610. U-shaped iron; 611. Receiving groove; 620. Central magnet; 630. Magnetic gap; 700. Sound-generating device.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0024] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] In recent years, with the rapid development of consumer electronics, these products have gained widespread application and consumer acceptance. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used as speakers, earpieces, and headphones. As the performance of electronic products improves, the improvement of the acoustic performance of sound-generating devices is an inevitable trend.

[0026] A loudspeaker typically consists of a magnetic circuit system and a vibration system. When the voice coil of the vibration system is energized, it generates an induced magnetic field. This induced magnetic field interacts with the magnetic field of the magnetic circuit system to produce an upward or downward force, which drives the diaphragm of the vibration system to vibrate and push the air to produce sound.

[0027] In related technologies, loudspeaker diaphragms generally use a split cone design, meaning the dust cap and cone portion of the diaphragm are separate units. This typically requires two bonding processes during assembly, reducing assembly efficiency. Simultaneously, the surround portion of the diaphragm is usually made of a relatively flexible material, while the dust cap and cone portion are made of relatively rigid materials. The rigidity of the dust cap and cone portion prevents the diaphragm from experiencing split vibrations in the high-frequency range, improving the product's high-frequency sound performance. Ideally, the dust cap and cone portion should be lightweight and highly rigid. However, currently, the rigidity of the dust cap and cone portion of diaphragms is insufficient, and their damping is poor, leading to split vibrations during high-frequency sound production, thus affecting the product's sound quality.

[0028] Based on the above concept and problems, this utility model proposes a diaphragm 100, which is applied to a sound-generating device 700, such as a speaker, earpiece, or headphones. It is understood that the sound-generating device 700 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, and smart glasses, etc., and is not limited thereto.

[0029] In this embodiment, the diaphragm 100 is assembled by setting the composite cone 2 as an integrally formed dust cap 21 and cone 22, so that the composite cone 2 is connected to the inner side of the folded ring portion 1 through the outer periphery of the cone 22, thereby realizing the assembly of the diaphragm 100, effectively reducing the assembly process and improving the assembly efficiency. At the same time, by setting both the dust cap 21 and cone 22 of the composite cone 2 as a composite layer 23 and at least one adhesive layer 24 on one side of the composite layer 23, and the composite layer 23 is made of carbon fiber prepreg 231 or aramid prepreg 232, not only is the rigidity of the composite cone 2 effectively improved and the bandwidth effectively extended, but also the damping performance is improved while ensuring rigidity, improving the product's sound quality, and effectively reducing distortion and other problems. Thus, when the diaphragm 100 is applied to the sound generating device 700, it can effectively improve the split vibration that is prone to occur during high-frequency sound generation and improve the assembly efficiency of the sound generating device 700.

[0030] Please refer to the reference. Figures 1 to 8As shown, in this embodiment of the present invention, the diaphragm 100 includes a folded ring portion 1 and a composite basin 2 disposed inside the folded ring portion 1. The composite basin 2 includes an integrally formed dust cap 21 and a cone basin 22. The outer periphery of the cone basin 22 is connected to the inner side of the folded ring portion 1. The cone basin 22 is inclined from the folded ring portion 1 to the dust cap 21. The diaphragm 100 has a front side 3 and a back side 4 disposed opposite to each other. The front side 3 is the sound output side. The dust cap 21 and the cone basin 22 both include a composite layer 23 and at least one adhesive layer 24 disposed on one side of the composite layer 23. The side of the composite layer 23 facing away from the adhesive layer 24 is the front side 3, and the side of the adhesive layer 24 facing away from the composite layer 23 is the back side 4. The composite layer 23 is a carbon fiber prepreg 231, an aramid prepreg 232, or a mixed fiber prepreg.

[0031] In this embodiment, the folded ring portion 1 of the diaphragm 100 has an upwardly convex bulge or a downwardly concave bulge structure, which can provide elastic deformation for the diaphragm 100 during vibration. It is understood that the outer side of the folded ring portion 1 is used to connect to structures such as a housing, outer shell, or frame to fix the diaphragm 100. The inner side of the folded ring portion 1 is connected to the outer periphery of the cone 22 of the composite cone 2. Thus, when the diaphragm 100 is applied in the sound-generating device 700, the diaphragm 100 is connected to the voice coil 510 via the composite cone 2. When the voice coil 510 vibrates, it drives the composite cone 2 of the diaphragm 100 to vibrate, thereby achieving sound generation.

[0032] Understandably, the diaphragm 100 has a front and a back side that are arranged opposite to each other. The front side of the diaphragm 100 is the sound radiation surface, that is, the sound output side, and the back side of the diaphragm 100 is connected to the voice coil 510. The larger the effective vibration area Sd of the diaphragm 100, the better it is for improving the acoustic performance and sound quality of the sound-generating device 700, and the composite cone 2 of the diaphragm 100 is all located within the effective vibration area Sd of the diaphragm 100.

[0033] It should be noted that the outer contour of the diaphragm 100 can be circular or square. In this embodiment, the outer contour of the diaphragm 100 can be circular. In this case, the protrusion or depression of the folded ring portion 1 is annular, and the outer side of the folded ring portion 1 can extend perpendicular to the vibration direction of the diaphragm 100 or extend parallel to the vibration direction of the diaphragm 100 towards the back side, etc., to effectively increase the connection area when connected with structures such as housings, outer shells, or frames, thereby improving the connection stability.

[0034] Understandably, the inner side of the folded ring 1 is connected to the composite basin 2, and the extending direction of the inner side of the folded ring 1 is set at an angle to the vibration direction of the diaphragm 100. Optionally, the extending direction of the inner side of the folded ring 1 is set perpendicular to the vibration direction of the diaphragm 100; or, the extending direction of the inner side of the folded ring 1 is parallel to the inclined surface of the conical basin 22 of the composite basin 2, which is not limited here.

[0035] In this embodiment, the conical basin 22 of the composite basin 2 can be selected as a conical basin structure with a conical setting. Optionally, the conical basin 22 is horn-shaped or flared, which is not limited here. The conical basin 22 is inclined from the folded ring portion 1 to the dust cap 21, that is, there is a height difference between the folded ring portion 1 and the dust cap 21 along the vibration direction of the diaphragm 100, and the dust cap 21 is located on the back side of the folded ring portion 1. It can be understood that the large end port of the conical basin 22 is connected to the deformable folded ring portion 1, which is suitable for using the deformation of the folded ring portion 1 to provide vibration space, and the small end port of the conical basin 22 is connected to the dust cap 21, which is suitable for preventing dust from falling into the sound generating device 700.

[0036] Understandably, by setting the composite basin 2 of the diaphragm 100 as an integrally formed dust cap 21 and cone basin 22, that is, the dust cap 21 and cone basin 22 are integrally formed structures, and by connecting the outer periphery of the cone basin 22 with the inner side of the folded ring part 1, the assembly of the diaphragm 100 can be realized. In this way, the assembly process of the diaphragm 100 is reduced and the assembly efficiency is improved.

[0037] It should be noted that, in order to improve the high-frequency sound effect of the diaphragm 100, the surround portion 1 of the diaphragm 100 is usually made of a relatively flexible material, while the dust cap 21 and cone 22 of the composite cone 2 are made of relatively rigid materials. The rigid dust cap 21 and cone 22 can prevent the diaphragm 100 from generating segmented vibrations in the high-frequency range, thereby improving the high-frequency sound effect of the product. Therefore, ideally, the materials of the dust cap and cone portion should be lightweight and have high rigidity.

[0038] In this embodiment, the dust cap 21 and cone 22 of the composite cone 2 are configured as a composite layer 23 and at least one adhesive layer 24 is disposed on one side of the composite layer 23. The composite layer 23 is made of carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg. Optionally, the mixed fiber cloth in the mixed fiber prepreg is woven from two different fibers, and one of the fibers is carbon fiber or aramid, which is not limited here. Utilizing the advantages of carbon fiber, such as heat resistance and chemical corrosion resistance, and its specific elastic modulus being 5 to 10 times greater than that of titanium and aluminum, and the advantages of aramid (Kevlar), such as high temperature resistance, flame retardancy, and good dimensional stability, the dust cap 21 and cone 22 of the composite cone 2 are made of high carbon fiber or aramid, which effectively improves the rigidity of the composite cone 2 and effectively extends the bandwidth. At the same time, by coating at least one adhesive layer 24 on the back of the composite layer 23, the damping performance is improved while ensuring the rigidity of the composite cone 2 of the diaphragm 100, thereby improving the product's sound quality and effectively reducing distortion and other problems.

[0039] It should be noted that carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg are fiber fabrics formed by completely immersing carbon fiber, aramid, or mixed fibers in the adhesive, so that the fiber fabric within the adhesive is fully impregnated and cured. It is understood that carbon fiber fabric, aramid fiber fabric, or mixed fiber fabric can be formed by weaving or knitting, and this is not limited to these methods.

[0040] In one embodiment, the carbon fiber prepreg 231 is made of carbon fiber cloth, meaning the carbon fiber cloth is completely immersed in the adhesive, allowing it to cure after being fully coated with the adhesive. It is understood that the outer surface of the carbon fiber cloth and the gaps between the carbon fiber cloths are coated or filled with adhesive. In this embodiment, the carbon fiber cloth is formed using any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, or bidirectional weave; no limitation is made here.

[0041] In one embodiment, the aramid prepreg 232 is made of aramid fiber cloth, meaning the aramid fiber cloth is completely immersed in the adhesive, allowing it to cure after being fully coated with the adhesive. It is understood that the outer surface of the aramid fiber cloth and the gaps within it are coated or filled with adhesive. In this embodiment, the aramid fiber cloth is formed using any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, or bidirectional weave; no limitation is made herein.

[0042] In one embodiment, the mixed fiber prepreg is made of a mixed fiber cloth, that is, the mixed fiber cloth is completely immersed in the adhesive, and then cured after being fully coated with the adhesive. It is understood that the outer surface of the mixed fiber cloth and the gaps within the mixed fiber cloth are coated or filled with adhesive.

[0043] In this embodiment, the hybrid fiber fabric is woven from a first fiber and a second fiber. The first fiber can be carbon fiber or aramid fiber, and the second fiber can be any one of carbon fiber, aramid fiber, glass fiber, basalt fiber, PET fiber, PEN fiber, ceramic fiber, or thermoplastic fiber (e.g., PEEK fiber, PA fiber, etc.), and the first fiber and the second fiber are different. Optionally, the hybrid fiber fabric can be woven using any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, or bidirectional weave; no limitation is made here.

[0044] In this embodiment, at least one adhesive layer 24 is disposed on the back side of the composite layer 23. The adhesive layer 24 can be disposed on the back side of the composite layer 23 by coating or spraying. Optionally, the composite layer 23 includes at least one layer of carbon fiber prepreg 231 or aramid prepreg 232 or a layer of mixed fiber prepreg.

[0045] In one implementation, such as Figure 7As shown, composite layer 23 is a layer of carbon fiber prepreg 231; or, composite layer 23 is a layer of aramid prepreg 232; or, composite layer 23 is a layer of mixed fiber prepreg. It can be understood that composite basin 2 includes a layer of carbon fiber prepreg 231 or a layer of aramid prepreg 232 or a layer of mixed fiber prepreg and at least one adhesive layer 24.

[0046] In another embodiment, such as Figure 8 As shown, composite layer 23 comprises multiple layers of carbon fiber prepreg 231; or, composite layer 23 comprises multiple layers of aramid prepreg 232; or, composite layer 23 comprises multiple layers of mixed fiber prepreg. It is understood that the multiple layers of carbon fiber prepreg 231, multiple layers of aramid prepreg 232, or multiple layers of mixed fiber prepreg are formed into composite layer 23 by hot pressing. It should be noted that adjacent layers of prepreg in the multiple layers of carbon fiber prepreg 231, multiple layers of aramid prepreg 232, or multiple layers of mixed fiber prepreg are bonded together with adhesive, and then processed by hot pressing to form composite layer 23.

[0047] Optionally, the thickness of both the dust cap 21 and the cone basin 22 is greater than or equal to 0.2 mm. In this embodiment, by setting the thickness of the composite basin 2 to be greater than or equal to 0.2 mm, the structural strength and rigidity of the composite basin 2 can be effectively guaranteed.

[0048] It should be noted that the thickness of the composite cone 2 is the sum of the thickness of the composite layer 23 and the thickness of the adhesive layer 24. Understandably, when the composite layer 23 is a single layer or multiple layers of carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg, and the thickness of the composite cone 2 is consistent, using a single layer of carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg in the diaphragm 100 applied to the sound-generating device 700 can further help improve the reduction of split vibrations that easily occur during high-frequency sound generation.

[0049] The diaphragm 100 of this invention is applied to a sound-generating device 700. By configuring the diaphragm 100 as a folded ring portion 1 and a composite basin 2 disposed inside the folded ring portion 1, and by configuring the composite basin 2 as an integrally formed dust cap 21 and cone 22, the outer periphery of the cone 22 is connected to the inner side of the folded ring portion 1, making the cone 22 inclined from the folded ring portion 1 to the dust cap 21. This reduces assembly steps and improves assembly efficiency during the assembly of the diaphragm 100. Simultaneously, by configuring the composite basin 2 of the diaphragm 100 as a composite layer 23 and a cone 22 disposed on one side of the composite layer 23, the assembly process is streamlined. The absence of one adhesive layer 24 means that both the dust cap 21 and the cone 22 are configured with a composite layer 23 and at least one adhesive layer 24. The composite layer 23 is made of carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg. This not only effectively improves the rigidity of the composite cone 2 and effectively extends the bandwidth, but also improves the damping performance and enhances the listening experience of the product while ensuring rigidity. It also effectively reduces distortion and other problems. Thus, when the diaphragm 100 is applied to the sound-generating device 700, it can effectively improve the split vibration that is prone to occur when generating high-frequency sound and improve the assembly efficiency of the sound-generating device 700.

[0050] In one embodiment, the thickness ratio of the adhesive layer 24 located in the cone 22 to the thickness of the composite layer 23 located in the cone 22 is 9% to 23%, and the thickness ratio of the adhesive layer 24 located in the dust cap 21 to the thickness of the composite layer 23 located in the dust cap 21 is 25% to 70%.

[0051] In this embodiment, by setting the ratio of the thickness of the adhesive layer 24 of the cone 22 to the thickness of the composite layer 23 to be less than the ratio of the thickness of the adhesive layer 24 of the dust cap 21 to the thickness of the composite layer 23, the thickness and weight of the cone 22 can be reduced while ensuring the rigidity of the composite cone 2, reducing distortion, and thus improving the vibration and sound production performance of the diaphragm 100. It is understood that the ratio of the thickness of the adhesive layer 24 of the cone 22 to the thickness of the composite layer 23 ranges from 9% to 23%, and the ratio of the thickness of the adhesive layer 24 of the dust cap 21 to the thickness of the composite layer 23 ranges from 25% to 70%.

[0052] Optionally, the ratio of the thickness of the adhesive layer 24 to the thickness of the composite layer 23 of the cone basin 22 is 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, etc., and is not limited here.

[0053] Optionally, the ratio of the thickness of the adhesive layer 24 of the dust cap 21 to the thickness of the composite layer 23 is 25%, 28%, 30%, 33%, 35%, 38%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, etc., and is not limited here.

[0054] In one embodiment, the adhesive layer 24 includes two layers, namely a first adhesive layer 241 and a second adhesive layer 242, wherein the first adhesive layer 241 is sandwiched between the composite layer 23 and the second adhesive layer 242; wherein the first adhesive layer 241 is a plugging adhesive and the second adhesive layer 242 is a backing adhesive.

[0055] In this embodiment, as Figure 8 As shown, by setting two adhesive layers 24 on the back of the composite layer 23, the two adhesive layers 24 are stacked on the back of the composite layer 23, thereby further improving the damping performance of the diaphragm 100, enhancing the listening experience of the product, and effectively reducing distortion and other problems. Thus, when the diaphragm 100 is applied to the sound-generating device 700, it can effectively improve the split vibration that is prone to occur when high-frequency sound is generated.

[0056] Understandably, the two adhesive layers 24 are the first adhesive layer 241 and the second adhesive layer 242, respectively. By setting the first adhesive layer 241 as a plugging adhesive and the second adhesive layer 242 as a backing adhesive, and sandwiching the first adhesive layer 241 between the composite layer 23 and the second adhesive layer 242, the connection performance between the two adhesive layers 24 and the composite layer 23, as well as the connection performance between the two adhesive layers 24, can be effectively achieved.

[0057] It should be noted that after the carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg is formed, a pore-filling adhesive is first applied to the back of the carbon fiber prepreg 231, aramid prepreg 232, or mixed fiber prepreg, and finally a second layer of back adhesive is applied to the back of the pore-filling adhesive.

[0058] In one embodiment, the connection between the dust cap 21 and the cone 22 extends toward the back surface 4 to form a groove 25, and the groove 25 surrounds the dust cap 21.

[0059] In this embodiment, as Figures 1 to 3 As shown, by providing a downwardly recessed groove 25 at the connection between the dust cap 21 and the cone 22 of the composite cone 2, the groove 25 is arranged around the outer periphery of the dust cap 21. In this way, the protrusion formed by the groove 25 on the back of the composite cone 2 can be used to connect with the voice coil 510 to improve the connection strength, and the position of the voice coil 510 can be adjusted. At the same time, the setting of the groove 25 also helps to improve the connection strength between the dust cap 21 and the cone 22.

[0060] Optionally, the groove 25, dust cap 21, and cone 22 are integrally formed. In this embodiment, the cone 22 has a small end connected to the dust cap 21 and a large end connected to the folded ring 1. The small end, large end, outer periphery of the dust cap 21, and inner periphery of the folded ring 1 of the cone 22 can all be circular. It can be understood that the groove 25 is an annular groove surrounding the outer periphery of the dust cap 21.

[0061] In this embodiment, as Figure 2 and Figure 3 As shown, the distance from the outer periphery of the dust cap 21 to the inner periphery of the cone basin 22 is defined as the width d1 of the groove 25, and the diameter of the outer periphery of the cone basin 22 is defined as d2. Optionally, 0.8%≤d1 / d2≤5%.

[0062] Understandably, the groove 25 includes an outer wall extending downward from the cone 22, an inner wall extending downward from the dust cap 21, and a bottom that connects the outer wall and the inner wall as a single unit. The inner wall may be adapted to the outer surface of the voice coil 510's frame; or, the outer wall may be adapted to the inner surface of the voice coil 510's frame; or, the bottom may be connected to the end face of the voice coil 510's frame, etc., without limitation. The width d1 of the groove 25 is the distance between the outer wall and the inner wall.

[0063] In this embodiment, the inner and outer walls of the groove 25 are both parallel to the vibration direction, and the bottom is a circular arc; or, the inner wall of the groove 25 is parallel to the vibration direction, the outer wall is inclined, and the bottom is a circular arc; or, the outer wall of the groove 25 is parallel to the vibration direction, the inner wall is inclined, and the bottom is a circular arc; or, both the inner and outer walls of the groove 25 are parallel to the vibration direction, and the bottom is a left-sloping circular arc; or, both the inner and outer walls of the groove 25 are parallel to the vibration direction, and the bottom is a right-sloping circular arc; or, both the inner and outer walls of the groove 25 are parallel to the vibration direction, and the bottom is square, etc., without limitation.

[0064] It should be noted that the width d1 of the groove 25 can be selected as the width of the groove opening of the groove 25, that is, the distance from the outer periphery of the dust cap 21 to the inner periphery of the cone 22.

[0065] In this embodiment, the outer periphery of the cone 22 is circular. By setting the ratio of the width d1 of the groove 25 to the diameter d2 of the outer periphery of the cone 22 within the range of 0.8% to 5%, the rigidity of the composite cone 2 can be effectively guaranteed, and the segmentation vibration that easily occurs during high-frequency sound generation can be improved. Optionally, d1 / d2 can be 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc., and is not limited here.

[0066] It should be noted that if the ratio of the width d1 of the groove 25 to the diameter d2 of the outer periphery of the cone 22 is too large, it will not only affect the rigidity of the composite basin 2, but also easily cause segmented vibration during high frequency sound generation; if the ratio of the width d1 of the groove 25 to the diameter d2 of the outer periphery of the cone 22 is too small, the cone 22 and the dust cap 21 of the composite basin 2 will easily have many burrs during the molding process, which will affect demolding.

[0067] In one embodiment, the connection between the dust cap 21 and the cone 22 is provided with a plurality of toothed protrusions 26 extending toward the rear side 4, and the plurality of toothed protrusions 26 are spaced apart along the periphery of the dust cap 21.

[0068] In this embodiment, as Figures 4 to 6 As shown, by setting multiple downward toothed protrusions 26 along the periphery at the connection between the dust cap 21 and the cone 22 of the composite cone 2, the multiple toothed protrusions 26 are arranged at intervals. On the one hand, the multiple toothed protrusions 26 can be used to connect the composite cone 2 and the voice coil 510 to ensure the connection strength. At the same time, the gap between two adjacent toothed protrusions 26 can also store glue to further ensure the connection strength. On the other hand, the multiple toothed protrusions 26 arranged at intervals can greatly improve the strength of the composite cone 2, thereby increasing the high-frequency reproduction limit of the diaphragm 100.

[0069] Optionally, the multiple toothed protrusions 26 are integrated with the dust cap 21 and the conical basin 22. In this embodiment, the number of toothed protrusions 26 can be selected from 2 to 14. Optionally, the number of toothed protrusions 26 is not less than two, and can be 4, 6, 8, 10, 12, or 14, generally not exceeding 14.

[0070] Understandably, setting the ratio P of the overall arc length of the toothed protrusions 26 to the circumference of the circle is suitable for comprehensively considering the strength and weight of the composite basin 2. Optionally, the ratio P of the sum of the arc lengths of multiple toothed protrusions 26 to the circumference of their respective circles is 40% to 90%. A lower ratio results in a lighter composite basin 2, while a higher ratio increases the overall strength of the composite basin 2; adjustments can be made as needed during the design process.

[0071] It should be noted that after determining the circumferential proportion P of the toothed protrusions 26, the number of toothed protrusions 26 is adjusted according to the diameter of the conical basin 22. If the number of toothed protrusions 26 is small and the circumferential proportion P is small, it will not only affect the overall strength of the composite basin 2, but also make assembly difficult. Optionally, the ratio P of the sum of the arc lengths of multiple toothed protrusions 26 to the circumference of their respective circles can be 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, etc., and is not limited here.

[0072] In this embodiment, the central angle corresponding to each toothed protrusion 26 is 5° to 180°. It can be understood that the central angle corresponding to the toothed protrusion 26 largely determines the contact area between the voice coil 510 and the cone 22. The larger the central angle, the larger the contact area of ​​a single toothed protrusion 26, and the better the positioning effect of the voice coil 510.

[0073] Optionally, the angle of the central angle corresponding to each toothed protrusion 26 is 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, etc., and is not limited here.

[0074] In this embodiment, as Figure 6 As shown, the toothed protrusion 26 includes an outer wall extending downward from the cone 22, an inner wall extending downward from the dust cap 21, and a bottom that connects the outer wall and the inner wall as a single unit. The inner wall is adapted to and connected to the outer surface of the voice coil 510 frame; or, the outer wall is adapted to and connected to the inner surface of the voice coil 510 frame; or, the bottom is connected to the end face of the voice coil 510 frame, etc., which are not limited here.

[0075] Understandably, the width of the toothed protrusion 26 is defined as W, which is the distance between the outer and inner sidewalls. The value range of the width W of the toothed protrusion 26 can be 1mm ≤ W ≤ 5mm. The width of the toothed protrusion 26 is related to the shape of the dust cap 21 and the molding process of the cone 22.

[0076] It should be noted that, generally, while ensuring the dimensions of the dust cap 21, the thickness of the side walls of the toothed protrusions 26 is equal to that of the cone basin 22. This design is suitable when the cone basin 22 is made of a sheet material with uniform wall thickness, allowing for one-time molding and easy processing. The width of the toothed protrusions 26 should not be too wide, as this will affect the dimensions of the dust cap 21 and consequently the overall performance of the product. While ensuring the dimensions of the dust cap 21, the width W of the toothed protrusions 26 can be appropriately reduced, requiring injection molding or slurry processing. However, it cannot be narrowed indefinitely; a gap of at least 1mm must be maintained.

[0077] In this embodiment, the inner and outer walls of the toothed protrusion 26 are parallel to the vibration direction, and the bottom is a circular arc; or, the inner wall of the toothed protrusion 26 is parallel to the vibration direction, the outer wall is inclined, and the bottom is a circular arc; or, the outer wall of the toothed protrusion 26 is parallel to the vibration direction, the inner wall is inclined, and the bottom is a circular arc; or, both the inner and outer walls of the toothed protrusion 26 are parallel to the vibration direction, and the bottom is a left-sloping circular arc; or, both the inner and outer walls of the toothed protrusion 26 are parallel to the vibration direction, and the bottom is a right-sloping circular arc; or, both the inner and outer walls of the toothed protrusion 26 are parallel to the vibration direction, and the bottom is square.

[0078] It should be noted that the width W of the toothed protrusion 26 can be selected as the width of the groove at the end of the toothed protrusion 26 near the dust cap 21, that is, the distance from the outer periphery of the dust cap 21 to the inner periphery of the cone 22.

[0079] In this embodiment, the height of each toothed protrusion 26 is H, and the value of the height H of the toothed protrusion 26 is in the range of 2mm ≤ H ≤ 5mm. It is understood that the height of the toothed protrusion 26 cannot be too high, as this would make it difficult to form the cone 22 and would affect the assembly of the voice coil 510 and the cone 22. However, the height of the toothed protrusion 26 must not be less than 2mm to ensure that the protrusion height is sufficient to position the voice coil 510.

[0080] Optionally, the width L of the connection surface between the toothed protrusion 26 and the voice coil 510 in the vibration direction is in the range of 0.5mm≤L≤5mm.

[0081] In one embodiment, the line connecting the two ends of the cone basin 22 that are connected to the folded ring portion 1 and the dust cap 21 respectively forms an angle θ with the plane where the end face of the cone basin 22 and the dust cap 21 are connected, and the angle θ ranges from 20° to 60°.

[0082] In this embodiment, as Figures 1 to 6 As shown, the end of the cone 22 connected to the folded ring 1 is the large end, and the end of the cone 22 connected to the dust cap 21 is the small end. The line connecting the large end and the small end of the cone 22 forms an angle θ with the plane containing the small end of the cone 22, and the angle θ ranges from 20° to 60°. That is, the surface of the cone 22 is inclined, and the cross-sectional area of ​​the cone 22 gradually increases from the small end to the large end along the vibration direction perpendicular to the diaphragm 100, and there is a height difference between the small end and the large end along the vibration direction of the diaphragm 100.

[0083] Optionally, the included angle θ can be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc., and is not limited here.

[0084] It is understood that the line connecting the small end to the large end of the cone basin 22 can be at least one of a straight line, a broken line, or an arc. Optionally, the cone basin 22 is formed by one or more arc segments from the folded ring portion 1 to the dust cap 21. In this embodiment, the front of the cone basin 22 is convex arc-shaped and the back is concave arc-shaped; or, the front and back of the cone basin 22 are wavy from the small end to the large end, which is not limited here.

[0085] like Figure 9 As shown, this utility model also proposes a sound-generating device 700, which includes a vibration system 500. The vibration system 500 includes the diaphragm 100 described above. The specific structure of the diaphragm 100 is as described in the foregoing embodiments. Since this sound-generating device 700 adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0086] In this embodiment, the sound-generating device 700 further includes a magnetic circuit system 600, which is provided with a magnetic gap 630; the vibration system 500 further includes a voice coil 510, the diaphragm 100 is opposite to and spaced apart from the magnetic circuit system 600, one end of the voice coil 510 is connected to the diaphragm 100, and the other end of the voice coil 510 is correspondingly provided with the magnetic gap 630.

[0087] Understandably, the sound-generating device 700 can be a miniature loudspeaker or a loudspeaker unit. The vibration system 500 and the magnetic circuit system 600 of the sound-generating device 700 are arranged opposite to each other. The side of the vibration system 500 facing away from the magnetic circuit system 600 forms the sound radiation surface of the sound-generating device 700, i.e., the front, while the side of the magnetic circuit system 600 facing away from the vibration system 500 forms the back of the sound-generating device 700.

[0088] Optionally, the external outline of the sound-generating device 700 can be circular or square, etc., and is not limited thereto. To mount and fix the vibration system 500 and magnetic circuit system 600 of the sound-generating device 700, the sound-generating device 700 also includes a housing or frame structure, etc., to integrate the vibration system 500 and magnetic circuit system 600 into a single structure, which is not limited thereto. It should be noted that the effective vibration area of ​​the sound-generating device 700 is the effective vibration area Sd of the diaphragm 100 of the vibration system 500 of the sound-generating device 700.

[0089] In this embodiment, the frame of the sound-generating device 700 has a mounting cavity, a first end connected to the diaphragm 100 of the vibration system 500, and a second end connected to the magnetic circuit system 600. It is understood that the frame is used to mount, fix, and support the vibration system 500 and the magnetic circuit system 600, that is, to provide a mounting base for the vibration system 500 and the magnetic circuit system 600.

[0090] Understandably, the diaphragm 100 of the vibration system 500 is connected to the first end of the basin frame, and the magnetic circuit system 600 is connected to the second end of the basin frame and located on the side of the diaphragm 100 facing the mounting cavity. The diaphragm 100, the mounting cavity of the basin frame, and the magnetic circuit system 600 cooperate to form a rear cavity. In this embodiment, the magnetic circuit system 600 includes a magnetically conductive component and a magnetic circuit component disposed on the magnetically conductive component. It should be noted that the magnetic circuit component can directly form a magnetic gap 630; or, a magnetic gap 630 can be formed between the magnetic circuit component and the magnetically conductive component.

[0091] Optionally, the magnetically conductive component is a U-shaped iron 610, and the magnetic circuit component is a central magnetic portion 620. Of course, in other embodiments, the magnetically conductive component is a T-shaped iron, and the magnetic circuit component is a side magnetic portion; this is not limited here.

[0092] In one embodiment, the magnetic circuit system 600 includes a U-shaped iron 610 and a central magnetic part 620. The U-shaped iron 610 is connected to a second end and has a receiving groove 611 that communicates with the mounting cavity. The central magnetic part 620 is disposed in the receiving groove 611 and is spaced from the side wall of the receiving groove 611 to form a magnetic gap 630.

[0093] In this embodiment, as Figure 9 As shown, the magnetic circuit system 600 is configured with a U-shaped iron 610 and a central magnetic part 620. The central magnetic part 620 is mounted and fixed using the receiving groove 611 of the U-shaped iron 610, such that the central magnetic part 620 is spaced from the side wall of the receiving groove 611 to form a magnetic gap 630. Furthermore, the U-shaped iron 610 is connected to the second end of the basin stand, thus achieving a fixed connection between the magnetic circuit system 600 and the basin stand.

[0094] To further improve connection stability, the U-shaped iron 610 may optionally be integrally injection molded with the basin frame. In this embodiment, the U-shaped iron 610 and the basin frame are integrally injection molded. It is understood that the U-shaped iron 610 of the magnetic circuit system 600 is made of a magnet or a magnetically conductive material. The U-shaped iron 610 is placed in the mold, and then the injection molding material of the support member 2 and the basin frame is introduced into the mold and integrally injection molded with the U-shaped iron 610; this is not limited here.

[0095] In this embodiment, as Figure 9 As shown, the central magnetic part 620 may be a central magnet and a central magnetic plate stacked together. The central magnet is connected to the bottom wall of the receiving groove 611, and the periphery of the central magnet and the central magnetic plate are spaced apart from the side wall of the receiving groove 611 to form a magnetic gap 630.

[0096] Of course, in other embodiments, the magnetic circuit system 600 can also be configured as a T-shaped iron and a side magnetic part. In this case, the T-shaped iron includes a base plate and a protruding post protruding from the center of the base plate. The side magnetic part is arranged around the protruding post and connected to the base plate, and the inner side of the side magnetic part is spaced from the outer peripheral wall of the protruding post to form a magnetic gap 630. It can be understood that the magnetic circuit system 600 is connected to the second end of the basin frame through the side magnetic part.

[0097] Optionally, the side magnetic part includes a side magnet and a side magnetic guide plate stacked together, with the side magnet sandwiched between the side magnetic guide plate and the base plate. In this embodiment, the side magnetic guide plate is integrally injection molded with the basin frame, but this is not limited thereto.

[0098] In one embodiment, the vibration system 500 further includes a centering support plate, the inner side of which is connected to the outer wall of the voice coil 510, and a support platform is formed on the side of the frame facing the mounting cavity. The support platform is located between the first end and the second end, and the outer side of the centering support plate is supported and connected to the support platform.

[0099] In this embodiment, as Figure 9As shown, a centering support is provided to center the voice coil 510, preventing polarization or oscillation during its vibration. Understandably, the centering support can be a spider structure. The centering support is annular, with its inner side connected to the outer wall of the voice coil 510 and its outer side connected to the frame.

[0100] Understandably, by forming a support platform on the side of the frame facing the mounting cavity, with the support platform positioned between the first and second ends, the outer support of the centering bracket can be connected to the support platform, thereby improving connection stability.

[0101] Optionally, the dust cap 21 protrudes towards the side away from the magnetic circuit system 600. This arrangement prevents the diaphragm 100 from interfering with the central magnet 620 of the magnetic circuit system 600 during vibration. To further ensure pressure balance inside and outside the voice coil 510, the voice coil 510 is provided with multiple through-hole structures. In this embodiment, the surround portion 1 protrudes towards the side away from the magnetic circuit system 600. This arrangement prevents the surround portion from interfering with the first end of the frame.

[0102] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 700. The specific structure of the sound-generating device 700 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0103] Optionally, the electronic device of this utility model can be a portable mobile electronic product such as a mobile phone or tablet, or a wearable device such as a watch, VR, or AR, etc., without specific limitations.

[0104] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A diaphragm used in a sound-generating device, characterized in that, The diaphragm includes a folded ring portion and a composite basin disposed inside the folded ring portion. The composite basin includes an integrally formed dust cap and a conical basin. The outer periphery of the conical basin is connected to the inner side of the folded ring portion. The conical basin is inclined from the folded ring portion to the dust cap. The diaphragm has a front and a back that are opposite to each other. The front is the sound-emitting side. The dust cap and the cone both include a composite layer and at least one adhesive layer disposed on one side of the composite layer. The side of the composite layer facing away from the adhesive layer is the front, and the side of the adhesive layer facing away from the composite layer is the back. The composite layer is a carbon fiber prepreg, an aramid prepreg, or a mixed fiber prepreg.

2. The diaphragm as described in claim 1, characterized in that, The composite layer is a layer of the carbon fiber prepreg, a layer of the aramid prepreg, or a layer of the mixed fiber prepreg; Alternatively, the composite layer may comprise multiple layers of the carbon fiber prepreg, multiple layers of the aramid prepreg, or multiple layers of the mixed fiber prepreg; wherein the multiple layers of the carbon fiber prepreg, multiple layers of the aramid prepreg, or multiple layers of the mixed fiber prepreg are formed into the composite layer by hot pressing.

3. The diaphragm as described in claim 1, characterized in that, The carbon fiber prepreg is made of carbon fiber cloth, which is formed by any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the aramid prepreg is made of aramid fiber cloth, and the aramid fiber cloth is formed by any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the mixed fiber prepreg is made of mixed fiber cloth, which is woven from a first fiber and a second fiber. The first fiber is carbon fiber or aramid, and the second fiber is any one of carbon fiber, aramid, glass fiber, basalt fiber, PET fiber, PEN fiber, ceramic fiber, and thermoplastic fiber, and the first fiber and the second fiber are different. The mixed fiber cloth is woven using any one of the following weaving methods: plain weave, twill weave, satin weave, unidirectional weave, and bidirectional weave. And / or, the thickness of the dust cap and the thickness of the cone are both greater than or equal to 0.2 mm.

4. The diaphragm as described in claim 1, characterized in that, The ratio of the thickness of the adhesive layer in the cone to the thickness of the composite layer in the cone is 9% to 23%, and the ratio of the thickness of the adhesive layer in the dust cap to the thickness of the composite layer in the dust cap is 25% to 70%.

5. The diaphragm as described in claim 1, characterized in that, The adhesive layer comprises two layers, namely a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is sandwiched between the composite layer and the second adhesive layer; The first adhesive layer is a plugging adhesive, and the second adhesive layer is a backing adhesive.

6. The diaphragm as described in any one of claims 1 to 5, characterized in that, The connection between the dust cap and the cone extends toward the back to form a groove, and the groove surrounds the dust cap. Wherein, the groove, the dust cap, and the cone are integral structures; and / or, the distance from the outer periphery of the dust cap to the inner periphery of the cone is defined as the width d1 of the groove, and the diameter of the outer periphery of the cone is defined as d2, 0.8%≤d1 / d2≤5%.

7. The diaphragm as described in any one of claims 1 to 5, characterized in that, The connection between the dust cap and the cone is provided with a plurality of tooth-shaped protrusions extending toward the rear side, and the plurality of tooth-shaped protrusions are spaced apart along the periphery of the dust cap; Wherein, the toothed protrusion is integrally formed with the dust cap and the cone basin; and / or, the number of toothed protrusions is 2 to 14; and / or, the ratio of the sum of the arc lengths of multiple toothed protrusions to the circumference of the circle they belong to is 40% to 90%; and / or, the angle of the central angle corresponding to each toothed protrusion is 5° to 180°; and / or, the width of the toothed protrusion is defined as W, where 1mm ≤ W ≤ 5mm.

8. The diaphragm as described in any one of claims 1 to 5, characterized in that, The line connecting the two ends of the cone basin to the folded ring and the dust cap respectively forms an angle θ with the plane containing the end face of the connection between the cone basin and the dust cap, and the angle θ ranges from 20° to 60°. And / or, the cone basin is formed by one or more arc segments from the folded ring portion to the dust cap.

9. A sound-generating device, characterized in that, The sound-generating device includes: A magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap; and A vibration system comprising a diaphragm and a voice coil as described in any one of claims 1 to 8, wherein the diaphragm is disposed opposite to and spaced apart from the magnetic circuit system, one end of the voice coil is connected to the diaphragm, and the other end of the voice coil is disposed corresponding to the magnetic gap.

10. An electronic device, characterized in that, The electronic device includes the sound-generating device as described in claim 9.

Images