Sound production device and electronic device

Abstract

The application discloses a sound generating device and electronic equipment, and relates to the technical field of electroacoustic transduction. The first diaphragm and the second diaphragm of the sound generating device are arranged at intervals along a first direction and are respectively connected with two ends of a voice coil along the first direction. A vibrating plate is located on the inner side of the voice coil. A side magnet part is arranged between the first diaphragm and the second diaphragm and is located on the outer side of the voice coil. The side magnet part is a Halbach magnetic circuit. The Halbach magnetic circuit has a magnetic field enhancement side facing the voice coil. Two center magnets of a center magnet part are located on the two sides of the vibrating plate along the first direction. The two center magnets are magnetized along the first direction and have opposite magnetization directions. The sound generating device forms a first cavity and a second cavity on the two sides of the vibrating plate and is provided with a first sound outlet hole and a second sound outlet hole which respectively communicate with the first cavity and the second cavity. The two center magnets are respectively exposed to the first cavity and the second cavity. The sound generating device disclosed by the application effectively increases the BL value, improves the acoustic performance and can reduce the sound leakage problem of the far field.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics, miniature speakers, as a common electroacoustic transducer, have been widely used in mobile phones, glasses, headphones, tablets and other fields. These portable terminal products have gradually formed a trend of multi-functionality, miniaturization and high performance.

[0003] In related technologies, speakers used in smart glasses are generally placed inside the temples of the glasses near the ears. However, the narrow internal space of the temples limits the performance of the speakers, resulting in low loudness. Furthermore, the open sound field design of the speakers inside the temples leads to significant sound leakage, which reduces the user experience. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device, specifically a dual-sided sound-generating device that not only improves the BL value and enhances the overall acoustic performance of the device, but also effectively reduces sound leakage in the far field.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising:

[0006] A vibration system comprising a diaphragm assembly and a voice coil, the diaphragm assembly comprising a first diaphragm, a second diaphragm, and a vibrating plate, the first diaphragm and the second diaphragm both vibrating along a first direction, and the first diaphragm and the second diaphragm being spaced apart along the first direction and respectively connected to both ends of the voice coil along the first direction; the vibrating plate is located inside the voice coil, and the outer periphery of the vibrating plate abuts against the inner peripheral wall of the voice coil; and

[0007] A magnetic circuit system, comprising a central magnetic section and a side magnetic section, wherein the side magnetic section is disposed between the first diaphragm and the second diaphragm and located outside the voice coil; the central magnetic section comprises two central magnets disposed opposite to each other along a first direction and spaced apart, the two central magnets being located on both sides of the diaphragm along the first direction and both central magnets being magnetized along the first direction but in opposite directions; the side magnetic section is a Helbeck magnetic circuit, the Helbeck magnetic circuit having a magnetic field enhancement side facing the voice coil; the side magnetic section and the central magnetic section cooperate to form a magnetic gap accommodating the voice coil.

[0008] The sound-generating device comprises a first cavity and a second cavity located on both sides of the vibrating plate along the first direction. The two central magnets are exposed in the first cavity and the second cavity respectively on the side facing the vibrating plate. The sound-generating device also has a first sound outlet and a second sound outlet respectively connecting the first cavity and the second cavity.

[0009] In one embodiment, the side magnet portion includes a first side magnet, a second side magnet, and a third side magnet stacked along the first direction. The first side magnet and the third side magnet are both magnetized along the first direction but in opposite directions. The second side magnet is magnetized in a direction perpendicular to the first direction, and the magnetic polarity of the side of the second side magnet facing the voice coil is opposite to the magnetic polarity of the ends of the first side magnet and the third side magnet that are far away from each other, so that the first side magnet, the second side magnet, and the third side magnet form the Heilbeck magnetic circuit.

[0010] The magnetic polarity of the first and third side magnets facing the second side magnet is the same as the magnetic polarity of the ends of the two central magnets that are far apart from each other.

[0011] In one embodiment, the sum of the thicknesses of the first side magnet, the second side magnet, and the third side magnet along the first direction is greater than the extension length of the voice coil along the first direction, but not greater than three times the extension length of the voice coil along the first direction.

[0012] And / or, the projections of the two central magnets along the first direction are located inside the voice coil;

[0013] And / or, the first diaphragm and the second diaphragm are arranged symmetrically with respect to the vibrating plate;

[0014] And / or, the two central magnets are arranged symmetrically with respect to the vibrating plate;

[0015] And / or, the voice coil is an integrally wound structure and extends along the first direction; or, the voice coil includes a first sub-voice coil and a second sub-voice coil disposed on opposite sides of the diaphragm, and the first diaphragm and the second diaphragm are respectively connected to the ends of the first sub-voice coil and the second sub-voice coil that are opposite to each other along the first direction;

[0016] And / or, the periphery of the diaphragm bends and extends toward the inner surface of the voice coil to form an extension, the extension being connected to the inner surface of the voice coil.

[0017] In one embodiment, the vibration system further includes a first frame and a second frame, wherein the two ends of the first frame along the first direction are respectively connected to one end of the first diaphragm and one end of the voice coil, and the two ends of the second frame along the first direction are respectively connected to the other end of the second diaphragm and the voice coil.

[0018] Both the first diaphragm and the second diaphragm include an inner connecting portion, a folded loop portion surrounding the inner connecting portion, and an outer connecting portion surrounding the folded loop portion. The inner connecting portion is connected to the end of the first frame or the second frame away from the voice coil.

[0019] In one embodiment, both of the folded ring portions protrude toward the edge magnetic portion;

[0020] And / or, the sound-generating device further includes a housing, and the two external connecting parts are respectively connected to the two ends of the housing along the first direction;

[0021] And / or, the first diaphragm and the vibrating plate radiate a first sound wave toward the first cavity, and the second diaphragm and the vibrating plate radiate a second sound wave toward the second cavity, wherein the first sound wave and the second sound wave are out of phase;

[0022] And / or, one end of the first skeleton and / or the second skeleton adjacent to the inner connecting portion bends and extends toward the inner connecting portion to form a first bent portion, the first bent portion being connected to the inner connecting portion;

[0023] And / or, the first skeleton and / or the second skeleton bend and extend at one end adjacent to the voice coil to form a second bend, the second bend being connected to the end of the voice coil; or, the first skeleton and / or the second skeleton extend along the inner surface of the voice coil at one end adjacent to the voice coil and are connected to the inner surface of the voice coil.

[0024] In one embodiment, the vibration system further includes a support, which is disposed inside the voice coil and extends along the first direction and protrudes from both ends of the voice coil along the first direction. The first diaphragm and the second diaphragm are respectively connected to both ends of the support along the first direction, and the outer periphery of the diaphragm is connected to the support.

[0025] The bracket is bonded or welded to the vibrating plate.

[0026] And / or, the bracket is bent and extended at both ends along the first direction to form edge portions, and the edge portions are connected to the first diaphragm or the second diaphragm.

[0027] In one embodiment, the magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke disposed opposite to each other, and the two central magnets include a first central magnet and a second central magnet, wherein the side of the first central magnet facing away from the vibrating plate is connected to the first magnetic yoke, and the side of the second central magnet facing away from the vibrating plate is connected to the second magnetic yoke.

[0028] The first cavity is formed between the first diaphragm, the voice coil, the vibrating plate, and the first magnetic yoke; the second cavity is formed between the second diaphragm, the voice coil, the vibrating plate, and the second magnetic yoke; and the first magnetic yoke and the second magnetic yoke are respectively provided with the first sound outlet and the second sound outlet.

[0029] In one embodiment, the sound-generating device further includes a housing located between the first magnetic yoke and the second magnetic yoke, with the outer peripheries of the first diaphragm and the second diaphragm respectively connected to the housing, and the edge magnet located between the first diaphragm and the second diaphragm and connected to the housing;

[0030] The outer shell, the first diaphragm, the voice coil, and the second diaphragm together form a third cavity, and the sound-generating device is provided with a vent hole communicating with the third cavity.

[0031] In one embodiment, the outer casing includes a first housing and a second housing disposed along the first direction, wherein the two ends of the first housing are respectively connected to the side magnetic portion and the first magnetic yoke, and the two ends of the second housing are respectively connected to the side magnetic portion and the second magnetic yoke;

[0032] The vent hole is provided between the first housing, the second housing, or the first housing and the second housing.

[0033] In one embodiment, the first magnetic yoke includes a first top plate portion and a first side plate portion arranged at an angle, the first central magnet is disposed on the first top plate portion, and the outer periphery of the first diaphragm is sandwiched between the first side plate portion and the outer shell, and is opposite to and spaced from the first top plate portion;

[0034] The second magnetic yoke includes a second top plate portion and a second side plate portion arranged at an angle, the second central magnet is disposed on the second top plate portion, and the outer periphery of the second diaphragm is sandwiched between the second side plate portion and the outer shell, and is opposite to and spaced from the second top plate portion;

[0035] The first top plate portion and / or the first side plate portion are provided with the first sound outlet, and the second top plate portion and / or the second side plate portion are provided with the second sound outlet.

[0036] The present invention also proposes an electronic device, which includes the sound-generating device described above;

[0037] The electronic device is provided with a mounting cavity and a first sound outlet and a second sound outlet communicating with the mounting cavity. The sound-generating device is disposed in the mounting cavity, and the first sound outlet of the sound-generating device is communicating with the first sound outlet, and the second sound outlet of the sound-generating device is communicating with the second sound outlet.

[0038] In one embodiment, the electronic device is smart glasses, the smart glasses including temples, the temples being provided with the mounting cavity, the first sound outlet and the second sound outlet;

[0039] The first sound outlet and the second sound outlet are located on two opposing surfaces of the temple of the glasses along the first direction, and one of the surfaces faces the user's ear.

[0040] The sound-generating device of this invention comprises a first diaphragm, a second diaphragm, and a vibrating plate as the diaphragm assembly of the vibration system. The first and second diaphragms are spaced apart along a first direction and connected to the two ends of a voice coil along the first direction, respectively. The vibrating plate is positioned inside the voice coil, with its outer periphery abutting against the inner wall of the voice coil. This creates a first cavity and a second cavity located on either side of the vibrating plate along the first direction within the sound-generating device. The device also includes a first sound outlet and a second sound outlet, respectively connecting the first and second cavities. This achieves dual diaphragms operating through a single... The voice coil is connected to the drive, thus ensuring that both the first and second diaphragms vibrate along the first direction. This guarantees the loudness consistency of the dual-diaphragm structure, and the sound waves from the two cavities are completely out of phase, allowing sound to be emitted directly from both sides of the sound-generating device. Placing the sound-generating device inside the temple of the glasses creates a true dipole, reducing far-field leakage and ensuring privacy. Simultaneously, by placing the side magnetic part of the magnetic circuit system between the first and second diaphragms, and located outside the voice coil, and by configuring the side magnetic part as a Hellbeck magnetic circuit, the Hellbeck magnetic circuit has a magnetic field enhancement side facing the voice coil. Two central magnets in the central magnet section are positioned opposite each other along a first direction and located on both sides of the diaphragm along the first direction. Both central magnets are magnetized along the first direction but in opposite directions, with the sides of the two central magnets exposed in the first and second cavities, respectively. This magnetic pair structure formed by the two central magnets enhances the magnetic field strength in the voice coil region. Combined with the Helbeck magnetic circuit formed by the side magnet section, this effectively increases the magnetic field strength and the magnetic flux density in the magnetic gap, causing magnetic field lines to effectively concentrate in the magnetic gap and increasing the number of magnetic field lines passing through the voice coil. This increases the magnetic force on the voice coil. Within the magnetic gap formed by the interaction of the side and center magnets, the magnetic force on the voice coil is enhanced by the magnetic alignment structure created by the two center magnets and the Helbeck magnetic circuit. The magnetic field lines are highly concentrated near the voice coil, increasing the driving force of the magnetic field acting on it, effectively increasing the BL value, and thus improving performance and the acoustic performance of the sound-producing device. Furthermore, eliminating the conventional center washer structure in the two center magnets not only allows for a thinner design, resulting in a more uniform distribution of magnetic field lines and a flatter BL(x) curve, thus reducing distortion, but also allows for a larger volume of the two center magnets under the same volume requirements, further increasing the BL value of the product. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention;

[0043] Figure 2 A top view schematic diagram of an embodiment of the sound-generating device provided by the present invention;

[0044] Figure 3 An exploded view of an embodiment of the sound-generating device provided by the present invention;

[0045] Figure 4 A cross-sectional schematic diagram of the first embodiment of the sound-generating device provided by the present invention;

[0046] Figure 5 A partial cross-sectional schematic diagram of the first embodiment of the sound-generating device provided by the present invention;

[0047] Figure 6 A cross-sectional schematic diagram of a second embodiment of the sound-generating device provided by the present invention;

[0048] Figure 7 A cross-sectional schematic diagram of a third embodiment of the sound-generating device provided by the present invention;

[0049] Figure 8 This is a cross-sectional schematic diagram of the fourth embodiment of the sound-generating device provided by the present invention;

[0050] Figure 9 A cross-sectional schematic diagram of the vibration system in one embodiment of the sound-generating device provided by the present invention;

[0051] Figure 10 A cross-sectional schematic diagram of the vibration system in another embodiment of the sound-generating device provided by the present invention;

[0052] Figure 11 A cross-sectional schematic diagram of the connection between the voice coil, the support, and the vibrating plate in one embodiment of the sound-generating device provided by the present invention;

[0053] Figure 12 A cross-sectional schematic diagram of the connection between the voice coil and the vibrating plate in one embodiment of the sound-generating device provided by the present invention;

[0054] Figure 13 A cross-sectional schematic diagram of the connection between the voice coil and the vibrating plate in another embodiment of the sound-generating device provided by the present invention;

[0055] Figure 14 A schematic diagram of the structure of an embodiment of the first diaphragm and the second diaphragm provided by the present invention;

[0056] Figure 15 A cross-sectional schematic diagram of the vibrating plate and the magnetic conductive layer in one embodiment of the sound-generating device provided by the present invention;

[0057] Figure 16 A cross-sectional schematic diagram of the vibrating plate and the magnetic conductive layer in another embodiment of the sound-generating device provided by the present invention;

[0058] Figure 17 A cross-sectional schematic diagram of the vibrating plate and the magnetic conductive element in one embodiment of the sound-generating device provided by the present invention;

[0059] Figure 18 A cross-sectional schematic diagram of the vibrating plate and the magnetic conductor in another embodiment of the sound-generating device provided by the present invention;

[0060] Figure 19 The BL curve diagram of the sound-generating device provided by the present invention and the prior art.

[0061] Explanation of icon numbers:

[0062] 100. Sound-generating device; 1. Outer shell; 11. First shell; 12. Second shell; 13. Third cavity; 14. Vent hole; 15. Mounting hole; 2. Vibration system; 21. Diaphragm assembly; 211. First diaphragm; 2111. Inner connecting part; 2112. Folded ring part; 2113. Outer connecting part; 2114. First end; 2115. Second end; 2116. Deformable part; 212. Second diaphragm; 213. Vibrating plate; 2131. Extension part; 2132. Magnetic conductive layer; 2133. Magnetic conductive element; 22. Voice coil; 221. Long side; 222. Short side; 223. First voice coil; 224. Second voice coil; 231. First frame; 232. Second frame; 233. First bend; 234. Second bend 24. Support; 241. Edge; 25. Centering support; 251. External fixing part; 252. Internal fixing part; 253. Spring arm; 3. Magnetic circuit system; 31. First magnetic yoke; 311. First top plate; 312. First side plate; 313. First sound outlet; 314. First cavity; 32. Second magnetic yoke; 321. Second top plate; 322. Second side plate; 323. Second sound outlet; 324. Second cavity; 33. Central magnetic part; 331. Central magnet; 3311. First central magnet; 3312. Second central magnet; 34. Side magnetic part; 341. Side magnet; 342. Side magnetic guide plate; 343. First side magnet; 344. Second side magnet; 345. Third side magnet; 35. Magnetic gap.

[0063] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0065] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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 indication will also change accordingly.

[0066] 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.

[0067] Furthermore, in this invention, 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 invention.

[0068] In recent years, with the rapid development of consumer electronics, electronic devices such as smartphones, smart glasses, and VR / AR products have gradually gained consumer acceptance and are widely used in daily life. Miniature speakers, as a common electroacoustic transducer, are widely used in mobile phones, glasses, headphones, tablets, and other fields, and these portable terminal products are gradually forming a trend towards multifunctionality, miniaturization, and high performance. With the improvement of electronic product performance, the improvement of the acoustic performance of speakers is also an inevitable trend.

[0069] In related technologies, speakers used in smart glasses are generally placed inside the temples near the ears. However, the limited internal space of the temples restricts the performance of the speakers, resulting in low loudness. At the same time, the sound outlet on the temples is usually some distance from the ear canal, which leads to a certain degree of attenuation of the loudness entering the ear canal. Furthermore, because this propagation method is similar to an open sound field, the speaker also radiates sound outwards, resulting in some leakage in the far field, a significant sound leakage phenomenon, poor privacy, and a reduced user experience.

[0070] Based on the above concepts and problems, this invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, smart glasses, etc., and is not limited thereto. The sound-generating device 100 of this invention has a dual-sided speaker structure, possessing advantages such as high performance and low sound leakage. Its application in eyeglasses perfectly meets the current market demand for eyeglasses. Furthermore, the materials and assembly processes of the components in the sound-generating device 100 are simple, highly mature, and have high mass production potential.

[0071] Please refer to the reference. Figures 1 to 18 As shown, in this embodiment of the invention, the sound-generating device 100 includes a vibration system 2 and a magnetic circuit system 3. The vibration system 2 includes a diaphragm assembly 21 and a voice coil 22. The diaphragm assembly 21 includes a first diaphragm 211, a second diaphragm 212, and a vibrating plate 213. Both the first diaphragm 211 and the second diaphragm 212 vibrate along a first direction, and are spaced apart along the first direction and respectively connected to both ends of the voice coil 22 along the first direction. The vibrating plate 213 is located inside the voice coil 22, and its outer periphery abuts against the inner peripheral wall of the voice coil 22. The magnetic circuit system 3 includes a central magnetic part 33 and a side magnetic part 34. The side magnetic part 34 is located between the first diaphragm 211 and the second diaphragm 212 and is located outside the voice coil 22. The central magnetic part 33 includes two central magnets 331 that are arranged opposite to each other and spaced apart along a first direction. The two central magnets 331 are located on both sides of the vibrating plate 213 along the first direction, and both central magnets 331 are magnetized along the first direction but in opposite directions. The side magnetic part 34 cooperates with the central magnetic part 33 to form a magnetic gap 35 for accommodating the voice coil 22. The sound generating device 100 has a first cavity 314 and a second cavity 324 located on both sides of the vibrating plate 213 along the first direction. The side of the two central magnets 331 facing the vibrating plate 213 is exposed in the first cavity 314 and the second cavity 324 respectively. The sound generating device 100 also has a first sound outlet 313 and a second sound outlet 323 that are respectively connected to the first cavity 314 and the second cavity 324.

[0072] In this embodiment, the sound-generating device 100 is a miniature loudspeaker. The sound-generating device 100 also includes a housing 1. The magnetic circuit system 3 and the vibration system 2 of the sound-generating device 100 can be mounted and fixed through the housing 1, that is, the magnetic circuit system 3 and the vibration system 2 are fixed to the housing 1, so that the sound-generating device 100 can be used as an independent component in an electronic device or a sound-generating module, which is not limited here. Of course, in other embodiments, the outer periphery of the diaphragm assembly 21 in the vibration system 2 can be directly fixed to the magnetic circuit system 3; or, the magnetic circuit system 3 and the vibration system 2 of the sound-generating device 100 can be installed as separate structures in the housing of the electronic device or the sound-generating module, which is not limited here.

[0073] Optionally, the outer contour of the sound-generating device 100 can be circular or square, so that the outer contours of the outer shell 1, the magnetic circuit system 3, and the vibration system 2 are correspondingly set to circular or square, depending on actual needs, and are not limited here. In this embodiment, the outer shell 1 can be a frame or frame structure, that is, the outer shell 1 has a cavity with openings at both ends. The magnetic circuit system 3 is connected to the outer shell 1, and the vibration system 2 is connected to the outer shell 1 and is opposite to and spaced from the magnetic circuit system 3. The outer shell 1 can be a steel sheet structure or a plastic structure, and is not limited here.

[0074] Optionally, the outer casing 1 can be a single integral structure or formed by the combination of multiple separate structures; no limitation is made here. Understandably, the outer casing 1 is provided with conductive terminals, and the voice coil 22 is electrically connected to the conductive terminals. This facilitates the connection and conduction of the voice coil 22 with the external circuit via the conductive terminals.

[0075] In this embodiment, as Figures 3 to 10As shown, by configuring the diaphragm assembly 21 of the vibration system 2 as a first diaphragm 211, a second diaphragm 212, and a vibrating plate 213, the first diaphragm 211 and the second diaphragm 212 are spaced apart along a first direction and respectively connected to the two ends of the voice coil 22 along the first direction. The vibrating plate 213 is located inside the voice coil 22, and the outer periphery of the vibrating plate 213 abuts against the inner peripheral wall of the voice coil 22. Thus, a first cavity 314 and a second cavity 324 are formed on both sides of the vibrating plate 213 along the first direction within the sound-generating device 100. A first sound outlet 313 and a second sound outlet 323 are respectively provided in the sound-generating device 100 to connect the first cavity 314 and the second cavity 324. The dual-diaphragm structure, connected to a voice coil 22, drives the vibrating plate 213 to vibrate. This ensures the consistency of the loudness of the sound waves from the two cavities, with completely opposite phases. Specifically, the first diaphragm 211 and the second diaphragm 212 radiate sound waves of equal magnitude and opposite phase to the first cavity 314 and the second cavity 324, respectively. This allows the first cavity 314 and the second cavity 324 to radiate sound waves of equal magnitude and opposite phase outwards through the first sound outlet 313 and the second sound outlet 323, respectively. Based on the dipole superposition effect, the two opposite-phase sound waves can cancel each other out to the greatest extent in the far field, significantly improving the sound leakage problem of the sound-generating device 100 during use, protecting user privacy, and enhancing the user experience. Placing the sound-generating device 100 within the temple of the glasses creates a true dipole effect, reducing far-field leakage and ensuring privacy.

[0076] It should be noted that the first diaphragm 211 and the second diaphragm 212 are directly connected to both ends of the voice coil 22 along the first direction. For example, the inner side of the first diaphragm 211 is directly connected to one end of the voice coil 22, and the inner side of the second diaphragm 212 is directly connected to the other end of the voice coil 22. Of course, the first diaphragm 211 and the second diaphragm 212 can also be indirectly connected to both ends of the voice coil 22 along the first direction. For example, the inner side of the first diaphragm 211 can be connected to one end of the voice coil 22 through a bracket or frame, and the inner side of the second diaphragm 212 can be connected to the other end of the voice coil 22 through a bracket or frame. This is not limited here.

[0077] Understandable, such as Figure 1 , Figures 3 to 8As shown, by placing the side magnetic part 34 of the magnetic circuit system 3 between the first diaphragm 211 and the second diaphragm 212 and located outside the voice coil 22, and by placing the two central magnets 331 of the central magnetic part 33 opposite to each other along the first direction and located on opposite sides of the diaphragm 213 along the first direction, the two central magnets 331 are magnetized along the first direction and in opposite directions. The side of the two central magnets 331 facing the diaphragm 213 is exposed in the first cavity 314 and the second cavity 324, respectively. In this way, the two central magnets 331 and the side magnetic part 34 cooperate to form a long vertical magnetic field region with a relatively uniform magnetic field distribution in the corresponding area of ​​the voice coil 22. This results in more and denser magnetic lines of force passing through the voice coil 22, and a greater driving force. This provides the voice coil 22 with a large and flat driving force that changes slowly with displacement, thereby achieving a superlinear BL(x) design and reducing the risk of distortion. Simultaneously, the magnetic field strength in the region where the voice coil 22 is located is further enhanced by the magnetically opposed structure formed by the two central magnets 331, effectively increasing the BL value and improving the acoustic performance of the sound-generating device 100. Furthermore, the elimination of the conventional central washer structure in the two central magnets 331 not only enables a thinner design, resulting in a more uniform distribution of magnetic field lines and a flatter BL(x) curve, thereby reducing distortion. Moreover, under the same volume requirements, the volume of the two central magnets 331 can be made larger due to the absence of the central washer structure, thereby increasing the BL value of the product. The BL value of the sound-generating device 100 of the present invention can be increased by 35% compared to conventional solutions. Here, B represents the magnetic flux density generated by the magnets, L is the effective length of the voice coil 22, and x is the vibration displacement of the voice coil 22.

[0078] In this embodiment, as Figures 3 to 8 As shown, the two central magnets 331 of the central magnet section 33 include a first central magnet 3311 and a second central magnet 3312. The first central magnet 3311 is located near the top of the voice coil 22, and the second central magnet 3312 is located near the bottom of the voice coil 22. It can be understood that the top of the voice coil 22 is the end where it connects to the first diaphragm 211, and the bottom of the voice coil 22 is the end where it connects to the second diaphragm 212. Optionally, the first central magnet 3311 is located within the first cavity 314, and the second central magnet 3312 is located within the second cavity 324.

[0079] Optionally, the projections of the two central magnets 331 along the first direction are located inside the voice coil 22. This avoids rubbing against the first central magnet 3311 or the second central magnet 3312 when the voice coil 22 vibrates. The radial outer height space of the central magnetic part 33 is used to satisfy the vibration displacement of the voice coil 22, eliminating the need for additional height space between the first central magnet 3311 and the second central magnet 3312 to accommodate the vibration displacement of the voice coil 22, thus facilitating a thinner design for the sound-generating device 100.

[0080] Meanwhile, by setting the central magnetic part 33 of the magnetic circuit system 3 as a first central magnet 3311 and a second central magnet 3312, and exposing the first central magnet 3311 and the second central magnet 3312 on the side facing the diaphragm 213 to the first cavity 314 and the second cavity 324 of the sound-generating device 100 respectively, both central magnets 331 (i.e., the first central magnet 3311 and the second central magnet 3312) are magnetized along the first direction and in opposite directions. Compared with the magnetic circuit structure of a conventional loudspeaker, the central magnetic part 33 of the present invention eliminates the central washer (or central magnetic plate) structure, thereby reducing the thickness of the sound-generating device 100 in the Z direction. Furthermore, the first central magnet 3311 and the second central magnet 3312 are opposite each other along the first direction and have opposite magnetization directions, forming a magnetic pair structure. The magnetic field lines generated by the first central magnet 3311 and the second central magnet 3312 repel each other and are transmitted to the outside of the voice coil 22. Together with the side magnetic part 34 located outside the voice coil 22, they form a long vertical magnetic field region with a relatively uniform magnetic field distribution. This results in more and denser magnetic field lines passing through the voice coil 22, and thus a greater driving force. This provides the voice coil 22 with a large and flat driving force that changes slowly with displacement, thereby achieving a superlinear BL(x) design and reducing the risk of distortion. Figure 19 As shown; and, given a fixed thickness of the sound-generating device 100, the central magnetic part 33 of the present invention eliminates the central washer (or central magnetic plate) structure. This allows the first central magnet 3311 and the second central magnet 3312 to work together, effectively increasing the volume of the central magnetic part 33 and improving the BL value. Compared to conventional solutions, the BL value of the sound-generating device 100 of the present invention can be increased by 35%, such as... Figure 19 As shown.

[0081] Optionally, the voice coil 22 is an annular voice coil and extends along a first direction, that is, the voice coil 22 has a height along the first direction and a thickness along a second direction, the second direction being perpendicular to the first direction, and the height of the voice coil 22 is greater than the thickness of the voice coil 22.

[0082] It should be noted that the thickness of the voice coil 22 is the distance between the inner and outer walls of the annular voice coil. In this embodiment, the height of the voice coil 22 is greater than its thickness. During vibration, especially when the vibration amplitude is relatively large, it is less affected by changes in the magnetic field, and the BL(x) curve is significantly flatter, which significantly reduces the distortion of the sound-generating device 100 and improves the sound quality. The voice coil 22 in this embodiment is suitable for full-range loudspeakers, with an operating frequency range of 20Hz to 20kHz.

[0083] Specifically, the ratio of the height to the thickness of the voice coil 22 can be between 1.1:1 and 10:1. The specific ratio can be 1.1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, etc., and users can choose according to their actual needs.

[0084] In this embodiment, as Figure 1 , Figures 4 to 8 As shown, by placing the side magnet 34 between the first diaphragm 211 and the second diaphragm 212 and on the outside of the voice coil 22, the side magnet 34 and the two central magnets 331 of the central magnet 33 cooperate to form a magnetic gap 35 to accommodate the voice coil 22, thus effectively ensuring the magnetic field strength within the magnetic gap 35.

[0085] Understandably, the side magnetic part 34 forms a magnetic circuit with the two central magnets 331 of the central magnetic part 33, and the magnetic lines of force of the two magnetic circuits repel each other, making the magnetic lines of force in the magnetic gap 35 more evenly distributed and more magnetic lines of force passing through the voice coil 22, thereby increasing the magnetic force on the voice coil 22, effectively increasing the BL value, and making the BL(x) curve flatter, thereby reducing distortion.

[0086] It should be noted that the side magnet 34 can be a single-piece structure. For example, the side magnet 34 can be a single-piece ring structure, that is, the side magnet 34 is arranged in a ring and surrounds the outside of the voice coil 22. Of course, the side magnet 34 can also be a separate structure. In this case, there are multiple side magnets 34, which are connected end to end to form a closed ring structure and surround the outside of the voice coil 22; or, multiple side magnets 34 are spaced apart and arranged around the voice coil 22, that is, there are gaps or notches between adjacent side magnets 34, which is not limited here.

[0087] In one embodiment, the sound-generating device 100 includes a vibration system 2 and a magnetic circuit system 3. The vibration system 2 includes a diaphragm assembly 21 and a voice coil 22. The diaphragm assembly 21 includes a first diaphragm 211, a second diaphragm 212, and a vibrating plate 213. Both the first diaphragm 211 and the second diaphragm 212 vibrate along a first direction and are spaced apart along the first direction, respectively connected to both ends of the voice coil 22 along the first direction. The vibrating plate 213 is located inside the voice coil 22, and its outer periphery abuts against the inner peripheral wall of the voice coil 22. The magnetic circuit system 3 includes a central magnetic part 33 and a side magnetic part 34. The side magnetic part 34 is located between the first diaphragm 211 and the second diaphragm 212 and outside the voice coil 22. The central magnetic part 33 includes components spaced apart and opposite to each other along the first direction. Two central magnets 331 are placed on both sides of the diaphragm 213 along the first direction, and both central magnets 331 are magnetized along the first direction but in opposite directions. The side magnetic part 34 is a Heilbeck magnetic circuit with a magnetic field enhancement side facing the voice coil 22. The side magnetic part 34 and the central magnetic part 33 cooperate to form a magnetic gap 35 to accommodate the voice coil 22. The sound generating device 100 has a first cavity 314 and a second cavity 324 located on both sides of the diaphragm 213 along the first direction. The side of the two central magnets 331 facing the diaphragm 213 is exposed in the first cavity 314 and the second cavity 324 respectively. The sound generating device 100 also has a first sound outlet 313 and a second sound outlet 323 that are respectively connected to the first cavity 314 and the second cavity 324.

[0088] In this embodiment, as Figure 4 and Figure 5 As shown, the side magnetic section 34 forms a Hellbeck magnetic circuit, which has a magnetic field strengthening side facing the voice coil 22 and a magnetic field weakening side facing away from the voice coil 22. It is understood that by setting the side magnetic section 34 as a Hellbeck magnetic circuit, a stronger magnetic field can be generated. This further enhances the magnetic field strength of the magnetic loop formed with the two central magnets 331, thereby increasing the magnetic field density passing through the voice coil 22 located within the magnetic gap 35. This increases the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, and thus improving performance and the acoustic performance of the sound-generating device 100.

[0089] Furthermore, the Heilbeck magnetic circuit allows for a uniform distribution of magnetic field lines at the voice coil 22 and good linearity in the magnetic field changes in the vibration directions of the first diaphragm 211 and the second diaphragm 212. This effectively improves the sound quality of the audio output by the sound-generating device 100, enhances the treble effect, and alleviates the distortion of the audio output by the sound-generating device 100 to a certain extent.

[0090] Understandable, such as Figure 1 , Figures 3 to 5As shown, the sound-generating device 100 comprises a first diaphragm 211, a second diaphragm 212, and a vibrating plate 213 in the diaphragm assembly 21 of the vibration system 2. The first diaphragm 211 and the second diaphragm 212 are spaced apart along a first direction and connected to the two ends of the voice coil 22 along the first direction, respectively. The vibrating plate 213 is disposed inside the voice coil 22, such that the outer periphery of the vibrating plate 213 abuts against the inner peripheral wall of the voice coil 22. Thus, a first cavity 314 and a second cavity 324 are formed within the sound-generating device 100 on both sides of the vibrating plate 213 along the first direction. The sound-generating device 100 is provided with a first sound outlet that communicates with the first cavity 314 and the second cavity 324 respectively. The second sound outlet 323, connected by a voice coil 22, drives the vibrating plate 213 to vibrate, thus achieving consistent loudness and completely opposite phase of the sound waves from the two cavities. This allows the sound-generating device 100 to emit sound directly from both sides. Placing the sound-generating device 100 inside the temple of the glasses can form a true dipole, reducing far-field leakage and ensuring privacy. Simultaneously, by placing the side magnetic part 34 of the magnetic circuit system 3 between the first diaphragm 211 and the second diaphragm 212, and located outside the voice coil 22, and configuring the side magnetic part 34 as a Heilbeck magnetic circuit, the Heilbeck magnetic circuit has a magnetic field enhancement side facing the voice coil 22, and the center... The two central magnets 331 of the magnetic section 33 are arranged opposite to each other along the first direction and are located on opposite sides of the diaphragm 213 along the first direction. This ensures that both central magnets 331 are magnetized along the first direction but in opposite directions. The sides of the two central magnets 331 facing the diaphragm 213 are exposed in the first cavity 314 and the second cavity 324, respectively. This magnetically opposed structure formed by the two central magnets 331 enhances the magnetic field strength in the region where the voice coil 22 is located. Combined with the Heilbeck magnetic circuit formed by the side magnetic section 34, this effectively increases the magnetic field strength and the density of magnetic flux through the magnetic gap 35. This allows magnetic field lines to effectively concentrate in the magnetic gap 35, increasing the magnetic flux passing through the voice coil 22. The increased number of magnetic field lines enhances the magnetic force on the voice coil 22. Within the magnetic gap 35 formed by the cooperation of the side magnetic portion 34 and the central magnetic portion 33, the magnetic force on the voice coil 22 is further amplified by the magnetic alignment structure formed by the two central magnets 331 and the Heilbeck magnetic circuit. The magnetic field lines are highly concentrated near the voice coil 22, increasing the driving force of the magnetic field acting on it, effectively increasing the BL value, and thus improving performance and the acoustic performance of the sound-generating device 100. Furthermore, the elimination of the conventional central washer structure in the two central magnets 331 not only allows for a thinner design, resulting in a more uniform distribution of magnetic field lines and a flatter BL(x) curve, thus reducing distortion, but also allows for a larger volume of the two central magnets 331 under the same volume requirements, further increasing the BL value of the product.

[0091] In one implementation, such as Figure 1 , Figures 3 to 5 As shown, the side magnet section 34 includes a first side magnet 343, a second side magnet 344, and a third side magnet 345 stacked along a first direction. The first side magnet 343 and the third side magnet 345 are both magnetized along the first direction but in opposite directions. The second side magnet 344 is magnetized in a direction perpendicular to the first direction, and the magnetic polarity of the side of the second side magnet 344 facing the voice coil 22 is opposite to the magnetic polarity of the ends of the first side magnet 343 and the third side magnet 345 that are far apart from each other, so that the first side magnet 343, the second side magnet 344, and the third side magnet 345 form a Heilbeck magnetic circuit. The magnetic polarity of the side of the first side magnet 343 and the third side magnet 345 facing the second side magnet 344 is the same as the magnetic polarity of the ends of the two center magnets 331 that are far apart from each other.

[0092] Optionally, the magnetic polarity of the side of the first magnet 343 and the third magnet 345 facing the second magnet 344 is the same as the magnetic polarity of the ends of the two central magnets 331 that are far apart from each other, and the magnetic polarity of the side of the second magnet 344 facing the voice coil 22 is the same as the magnetic polarity of the ends of the two central magnets 331 that are far apart from each other.

[0093] Understandably, the first side magnet 343 and the first center magnet 3311 form a magnetic circuit, and the third side magnet 345 and the second center magnet 3312 form a magnetic circuit, so that the magnetic field lines of the two magnetic circuits are concentrated to the second side magnet 344, and are further enhanced by the second side magnet 344 before passing through the voice coil 22 in the magnetic gap 35. This further increases the magnetic field line density, increases the driving force of the magnetic field acting on the voice coil 22, effectively increases the BL value, and thus improves the performance and acoustic performance of the sound-generating device 100.

[0094] In one embodiment, the sum of the thicknesses of the first side magnet 343, the second side magnet 344, and the third side magnet 345 along the first direction is greater than the extension length of the voice coil 22 along the first direction, but not greater than three times the extension length of the voice coil 22 along the first direction.

[0095] In this embodiment, as Figure 4 and Figure 5 As shown, by setting the sum of the thicknesses of the first side magnet 343, the second side magnet 344, and the third side magnet 345 along the first direction to be greater than the extension length of the voice coil 22 along the first direction, and not greater than three times the extension length of the voice coil 22 along the first direction, the driving force of the central magnet 33 and the side magnet 34 on the voice coil 22 is ensured.

[0096] Optionally, the projection of the second magnet 344 along the direction perpendicular to the first direction is located within the extension length of the voice coil 22 along the first direction.

[0097] In this embodiment, when the sound-generating device 100 is not working, that is, when the voice coil 22 is not vibrating, the projection of the second side magnet 344 along the direction perpendicular to the first direction is located between the top and bottom of the voice coil 22. This ensures that the voice coil 22 can repeatedly approach the first central magnet 3311 or the second central magnet 3312 during vibration, thereby ensuring that the magnetic force on the voice coil 22 remains unchanged or changes very little when it vibrates, and making the magnetic field lines of the magnetic circuit system 3 more uniformly distributed and the BL(x) curve flatter, thereby reducing distortion.

[0098] It should be noted that when the voice coil 22 vibrates at a small amplitude, the projection of the second magnet 344 along the direction perpendicular to the first direction is located between the top and bottom of the voice coil 22. However, when the voice coil 22 vibrates at a large amplitude, the projection of the second magnet 344 along the direction perpendicular to the first direction is located between the top and bottom of the voice coil 22 only when the voice coil 22 is not vibrating; this is not a limitation.

[0099] In one embodiment, the vibrating plate 213 is equidistant from the corresponding central magnet 331 on both sides along the first direction.

[0100] In this embodiment, as Figures 4 to 8 As shown, along the first direction, the diaphragm 213 has a first surface facing the first central magnet 3311 and a second surface facing the second central magnet 3312. Optionally, the distance from the first surface to the first central magnet 3311 is the same as the distance from the second surface to the second central magnet 3312. This ensures that when the voice coil 22 drives the diaphragm 213 to vibrate along the first direction, collision interference between the diaphragm 213 and the first and second central magnets 3311 can be effectively avoided. Optionally, the projection of the diaphragm 213 along the perpendicular direction is located at the middle of the voice coil 22, that is, the projection of the diaphragm 213 along the second direction is located at the middle of the voice coil 22. In this way, the magnetic field lines of the magnetic field where the voice coil 22 is located are more uniform, and the magnetic circuit system 3 can provide the voice coil 22 with a large and flat driving force that changes slowly with displacement, thereby realizing a superlinear BL(x) design and reducing the risk of distortion. Optionally, the diaphragm 213 corresponds to the middle position of the voice coil 22 along the first direction.

[0101] Optionally, the thickness of the diaphragm 213 along the first direction is less than the extension length of the voice coil 22 along the first direction. In this way, during the vibration of the voice coil 22, it can be ensured that the diaphragm 213 and the voice coil 22 cooperate to provide accommodating space for the two central magnets 331, and the structural strength of the diaphragm 213 and the sealing performance of the first cavity 314 and the second cavity 324 can be ensured.

[0102] To further ensure that when the voice coil 22 vibrates within the magnetic gap 35, it drives the first diaphragm 211 and the second diaphragm 212 to radiate sound waves of equal magnitude and opposite phase to the first cavity 314 and the second cavity 324, optionally, the magnetic energy products of the two central magnets 331 are the same. This ensures that the magnetic field strength of the first central magnet 3311 is the same as that of the second central magnet 3312, thereby making the magnetic driving force acting on the voice coil 22 the same.

[0103] To ensure that the loudness of the sound waves emitted by the first cavity 314 and the second cavity 324 is consistent, and the magnetic field of the magnetic gap 35 is uniform, the two central magnets 331 may optionally be arranged symmetrically with respect to the diaphragm 213. This arrangement ensures that the driving force at both ends of the voice coil 22 is the same.

[0104] In this embodiment, the two central magnets 331 have the same outer contour, and the thickness ratio of the two central magnets 331 along the first direction can be selected as 0.5 to 2. Optionally, the thickness ratio of the two central magnets 331 along the first direction can be selected as 0.5, 1, 1.5, 2, etc., and is not limited here. This arrangement ensures that the two central magnets 331 of the central magnetic part 33 form magnetic circuits with the side magnetic part 34, thereby ensuring the magnetic linear density passing through the voice coil 22 within the magnetic gap 35.

[0105] To further ensure that the loudness of the sound waves emitted by the first cavity 314 and the second cavity 324 is consistent, the first diaphragm 211 and the second diaphragm 212 may optionally be arranged symmetrically with respect to the vibrating plate 213.

[0106] Understandably, in order to ensure that the central magnet 33 and the side magnet 34 cooperate to generate a driving force on the voice coil 22, the thickness of the side magnet 34 along the first direction may be greater than the extension length of the voice coil 22 along the first direction. On the other hand, in order to reduce the thickness of the sound-generating device 100 and further reduce the space occupied by the whole device, the thickness of the side magnet 34 along the first direction is not greater than 3 times the extension length of the voice coil 22 along the first direction.

[0107] In one embodiment, the projection of the voice coil 22 along the first direction is located on the surface of the side magnet portion 34 facing the voice coil 22. Optionally, the projection of the voice coil 22 along the first direction is located between the two center magnets 331.

[0108] In this embodiment, when the sound-generating device 100 is not working, that is, when the voice coil 22 is not vibrating, the projection of the voice coil 22 along the first direction (that is, the second direction) is located on the surface of the side magnetic part 34 facing the voice coil 22. The projection of the voice coil 22 along the first direction (that is, the second direction) is located between the two central magnets 331. This ensures that the voice coil 22 can repeatedly approach the first central magnet 3311 or the second central magnet 3312 during vibration, thereby ensuring that the magnetic force on the voice coil 22 remains unchanged or changes very little when it moves, and making the magnetic field lines of the magnetic circuit system 3 more uniformly distributed and the BL(x) curve flatter, thereby reducing distortion.

[0109] It should be noted that, under small amplitude conditions, the projection of the voice coil 22 along the perpendicular direction is located on the surface of the side magnet 34 facing the voice coil 22, and the projection of the voice coil 22 along the perpendicular direction is located between the two central magnets 331. However, under large amplitude conditions, only when the voice coil 22 is not vibrating, the projection of the voice coil 22 along the perpendicular direction is located on the surface of the side magnet 34 facing the voice coil 22, and the projection of the voice coil 22 along the perpendicular direction is located between the two central magnets 331; this is not a limitation.

[0110] In one implementation, such as Figures 3 to 12 As shown, the voice coil 22 can also be configured as an integral molding structure, that is, the voice coil 22 is an integral wound molding structure and extends along the first direction, so that the voice coil 22 is housed in the magnetic gap 35, thereby simplifying the structural design of the sound generating device 100 and improving assembly efficiency.

[0111] Of course, in other embodiments, the voice coil 22 can also be configured as a separate structure, such as... Figure 13 As shown, the voice coil 22 includes a first sub-voice coil 223 and a second sub-voice coil 224 disposed on opposite sides of the diaphragm 213. The first diaphragm 211 and the second diaphragm 212 are respectively connected to the ends of the first sub-voice coil 223 and the second sub-voice coil 224 that are opposite to each other in a first direction, which is not limited here.

[0112] To further improve the connection stability of the vibrating plate 213, in one embodiment, such as Figure 12 As shown, the periphery of the diaphragm 213 is bent and extended toward the inner surface of the voice coil 22 to form an extension 2131, which is connected to the inner surface of the voice coil 22. It can be understood that by bending and extending the periphery of the diaphragm 213 to form the extension 2131, the connection area with the voice coil 22 is increased, thereby improving the connection strength and stability.

[0113] To further increase the driving force on the voice coil 22 and improve the performance of the sound-generating device 100, in one embodiment, the diaphragm 213 has magnetic properties. With this configuration, when the voice coil 22 vibrates, the diaphragm 213 can be attracted to each other by the two central magnets 331 of the central magnetic part 33, thereby increasing the driving force on the voice coil 22 and thus improving the performance of the sound-generating device 100.

[0114] It is understandable that the vibrating plate 213 has magnetic properties, which can be because the vibrating plate 213 itself is made of magnetic material or is made of a material containing magnetic material. Of course, structures such as magnetic layer 2132 and magnetic component 2133 can also be provided on the vibrating plate 213, which is not limited here.

[0115] In one embodiment, such as Figure 15 and Figure 16 As shown, at least one surface of the vibrating plate 213 is coated with a magnetically conductive layer 2132. It is understood that the surface of the vibrating plate 213 facing the first central magnet 3311 and / or the second central magnet 3312 is coated with the magnetically conductive layer 2132. Optionally, the magnetically conductive layer 2132 is a magnetically conductive coating applied to the vibrating plate 213.

[0116] Optionally, the sum of the thickness of the diaphragm 213 along the first direction and the thickness of the magnetic layer 2132 along the first direction is less than the extension length of the voice coil 22 along the first direction. Understandably, to avoid the magnetic layer 2132 being too thick, which would result in excessive weight of the diaphragm 213 affecting the vibration quality of the vibration system 2, the thickness of the magnetic layer 2132 along the first direction is optionally no greater than 5 times the thickness of the diaphragm 213 along the first direction.

[0117] In one embodiment, such as Figure 17 and Figure 18 As shown, the vibrating plate 213 is provided with a magnetic conductive element 2133. It can be understood that the magnetic conductive element 2133 can be a metal magnetic conductive element, which is embedded inside the vibrating plate 213; or, the magnetic conductive element 2133 is embedded on the surface of the vibrating plate 213; or, the vibrating plate 213 is provided with a through hole, and the magnetic conductive element 2133 is embedded in the through hole, which is not limited here.

[0118] Optionally, the vibrating plate 213 and the magnetic conductive component 2133 are integrally formed; or, the vibrating plate 213 and the magnetic conductive component 2133 are bonded or welded together, etc., which are not limited here.

[0119] To ensure the connection between the first diaphragm 211 and the second diaphragm 212 and the voice coil 22, and to form a space between the first diaphragm 211 and the second diaphragm 212 for mounting the side magnet 34, so as to ensure that the vibration of the first diaphragm 211 and the second diaphragm 212 does not interfere with the side magnet 34, in one embodiment, the vibration system 2 further includes a skeleton structure connected to the voice coil 22 and extending along a first direction to support and connect the first diaphragm 211 and the second diaphragm 212, and to be located away from the voice coil 22. It is understood that the skeleton structure can be an integral structure, or it can be a separate structure; this is not limited here.

[0120] In one embodiment, the vibration system 2 further includes a support 24, which is disposed inside the voice coil 22 and extends along a first direction and protrudes from both ends of the voice coil 22 along the first direction. The first diaphragm 211 and the second diaphragm 212 are respectively connected to both ends of the support 24 along the first direction, and the outer periphery of the diaphragm 213 is connected to the support 24.

[0121] In this embodiment, as Figure 11 As shown, by setting the skeleton structure as a one-piece molded bracket 24, and placing the bracket 24 inside the voice coil 22, extending along the first direction and protruding from both ends of the voice coil 22 along the first direction, it is convenient to connect the first diaphragm 211 and the second diaphragm 212 to the two ends of the bracket 24 along the first direction, saving assembly steps. It is understood that the outer periphery of the diaphragm 213 is connected to the bracket 24, which not only allows the diaphragm 213 and the bracket 24 to fit in the space on opposite sides of the diaphragm 213 to accommodate the two central magnets 331, but also improves the sealing performance.

[0122] It is understandable that the bracket 24 and the vibrating plate 213 are separate components. Optionally, the bracket 24 and the vibrating plate 213 can be bonded or welded together, which is not limited here.

[0123] In order to further improve the connection stability between the bracket 24 and the first diaphragm 211 and the second diaphragm 212, in one embodiment, the bracket 24 is bent and extended at both ends along the first direction to form edge portions 241, and the edge portions 241 are connected to the first diaphragm 211 or the second diaphragm 212.

[0124] Understandable, such as Figure 11 As shown, at least one end of the bracket 24 is bent and extended toward the first diaphragm 211 or the second diaphragm 212 to form an edge portion 241, so that the side of the first diaphragm 211 or the second diaphragm 212 is supported and connected to the edge portion 241, thereby increasing the connection area and improving the connection stability.

[0125] In one embodiment, the vibration system 2 further includes a first frame 231 and a second frame 232. The two ends of the first frame 231 along the first direction are respectively connected to one end of the first diaphragm 211 and the voice coil 22, and the two ends of the second frame 232 along the first direction are respectively connected to the other end of the second diaphragm 212 and the voice coil 22.

[0126] In this embodiment, as Figures 3 to 10 As shown, by setting the skeleton structure as a split structure, the skeleton structure includes a first skeleton 231 and a second skeleton 232. The first skeleton 231 and the second skeleton 232 are respectively located at both ends of the voice coil 22 along the first direction. That is, the two ends of the first skeleton 231 along the first direction are respectively connected to one end of the first diaphragm 211 and the voice coil 22, and the two ends of the second skeleton 232 along the first direction are respectively connected to the other end of the second diaphragm 212 and the voice coil 22. Thus, the first skeleton 231 and the second skeleton 232 do not occupy the space of the magnetic gap 35, which is beneficial to reducing the width of the magnetic gap 35. Furthermore, the first skeleton 231 and the second skeleton 232 support the first diaphragm 211 and the second diaphragm 212 away from each other, so that the first diaphragm 211 and the second diaphragm 212 are spaced apart along the first direction, forming a space for mounting the side magnet 34.

[0127] To increase the connection stability between the first frame 231 / second frame 232 and the first diaphragm 211 / second diaphragm 212, in one embodiment, such as Figures 3 to 10 As shown, the end of the first frame 231 and / or the second frame 232 away from the voice coil 22 is bent and extended toward the first diaphragm 211 / second diaphragm 212 to form a first bent portion 233. The first diaphragm 211 / second diaphragm 212 is connected to the first bent portion 233, thereby increasing the connection area and improving the connection stability.

[0128] To increase the connection stability between the first frame 231 / second frame 232 and the voice coil 22, in one embodiment, such as Figures 3 to 10 As shown, the first frame 231 and / or the second frame 232 bend and extend near one end of the voice coil 22 to form a second bend 234, which is connected to the end of the voice coil 22. This increases the connection area and improves connection stability.

[0129] Of course, in other embodiments, the first skeleton 231 and / or the second skeleton 232 extends along the inner surface of the voice coil 22 adjacent to one end of the voice coil 22 and connects with the inner surface of the voice coil 22. It is understood that the first skeleton 231 and / or the second skeleton 232 may extend along the inner surface of the voice coil 22 to connect with or abut against the diaphragm 213, which is not limited here.

[0130] In one embodiment, both the first diaphragm 211 and the second diaphragm 212 include an inner connecting portion 2111, a folded ring portion 2112 surrounding the inner connecting portion 2111, and an outer connecting portion 2113 surrounding the folded ring portion 2112. The inner connecting portion 2111 is connected to the end of the first frame 231 or the second frame 232 away from the voice coil 22.

[0131] In this embodiment, as Figures 3 to 9 As shown, the inner connecting portion 2111, the folded ring portion 2112, and the outer connecting portion 2113 of the first diaphragm 211 and the second diaphragm 212 are connected and arranged in a direction perpendicular to the first direction. The first diaphragm 211 and the second diaphragm 212 are connected to the first frame 231 / second frame 232 or the bracket 24 through the inner connecting portion 2111.

[0132] Optionally, one end of the first frame 231 and / or the second frame 232 adjacent to the inner connecting portion 2111 is bent and extended toward the inner connecting portion 2111 to form a first bent portion 233, and the first bent portion 233 is connected to the inner connecting portion 2111.

[0133] Understandably, the first diaphragm 211 and the second diaphragm 212 are connected to the outer shell or housing or other structures via the external connecting portion 2113. In one embodiment, the sound-generating device 100 further includes an outer shell 1, and the two external connecting portions 2113 are respectively connected to both ends of the outer shell 1 along a first direction, such that the outer shell 1, the first diaphragm 211, the first frame 231, the voice coil, the second frame 232, and the second diaphragm 212 enclose a third cavity 13, and the side magnet portion 34 is located inside the third cavity 13 and is connected to the outer shell 1.

[0134] It should be noted that the folded ring portion 2112 of the first diaphragm 211 and the second diaphragm 212 can be an upwardly convex hull structure or a downwardly concave hull structure. Optionally, both folded ring portions 2112 protrude towards the side magnet portion 34, which is not limited here.

[0135] Of course, the first diaphragm 211 and the second diaphragm 212 can also be configured as vertical diaphragms. In one embodiment, such as Figure 10 and Figure 14 As shown, both the first diaphragm 211 and the second diaphragm 212 include a first end 2114, a second end 2115, and a deformable portion 2116 connecting the first end 2114 and the second end 2115. The first end 2114 and the second end 2115 are disposed at both ends of the deformable portion 2116 along a first direction. The first end 2114 is connected to the first frame 231 / second frame 232 or the bracket 24, and the second end 2115 is connected to the side magnet portion 34.

[0136] Understandably, the deformable portion 2116 is capable of deforming and expanding along the first direction, and the deformable portion 2116 is provided with at least one bent portion along the first direction. Optionally, the deformable portion 2116 is provided with multiple bent portions along the first direction, and the multiple bent portions are arranged and connected along the first direction, which is not limited here.

[0137] In one embodiment, the first diaphragm 211 and the vibrating plate 213 radiate a first sound wave to the first cavity 314, and the second diaphragm 212 and the vibrating plate 213 radiate a second sound wave to the second cavity 324, wherein the first sound wave and the second sound wave are out of phase.

[0138] In this embodiment, the first cavity 314 and the second cavity 324 are located on both sides of the vibrating plate 213 along the first direction. Figure 4 , Figures 6 to 8 As shown, the magnetic circuit system 3 also includes a first magnetic yoke 31 and a second magnetic yoke 32 arranged opposite to each other, such that a first cavity 314 is formed between the first diaphragm 211, the first frame 231 or support 24, the diaphragm 213 and the first magnetic yoke 31 of the magnetic circuit system 3, such that a second cavity 324 is formed between the second diaphragm 212, the second frame 232 or support 24, the diaphragm 213 and the second magnetic yoke 32 of the magnetic circuit system 3, and a third cavity 13 is formed between the first diaphragm 211, the first frame 231 or support 24, the voice coil 22 and the outer shell 1.

[0139] Understandably, the sound-generating device 100 is provided with a first sound outlet 313 that connects to the first cavity 314 and a second sound outlet 323 that connects to the second cavity 324, so that the sound-generating device 100 emits sound outward through the first sound outlet 313 and the second sound outlet 323.

[0140] In order to balance the air pressure of the first cavity 314, the second cavity 324 and the third cavity 13, the sound-generating device 100 is also provided with a vent hole 14 that connects to the third cavity 13, so that the third cavity 13 of the sound-generating device 100 can release air through the vent hole 14.

[0141] Understandably, the voice coil 22 drives the first diaphragm 211 and the vibrating plate 213 to radiate the first sound wave into the first cavity 314, and the voice coil 22 drives the second diaphragm 212 and the vibrating plate 213 to radiate the second sound wave into the second cavity 324, making the first and second sound waves out of phase. This causes the first sound wave in the first cavity 314 of the sound-generating device 100 to radiate outward through the first sound outlet 313, and the second sound wave in the second cavity 324 to radiate outward through the second sound outlet 323. From a fixed position at a relatively far distance in the environment, since the positions of the two sound waves are relatively close, it can be considered that the fixed position is approximately equidistant from the two sound waves, causing the two sound waves to generate two sound fields of equal size and opposite phase. Therefore, the fixed position will receive two sound waves of equal size and opposite phase. According to the superposition effect of dipoles, the sound waves at the fixed position can cancel each other out to the greatest extent, greatly improving the sound leakage problem of the sound-generating device 100 during use, protecting the user's privacy, and improving the user experience.

[0142] In another embodiment, the side magnet part 34 includes two side magnets 341 stacked along a first direction and a side magnetic plate 342 disposed between the two side magnets 341; wherein, the two side magnets 341 are magnetized along the first direction and the magnetization directions are opposite, and the magnetic poles at the ends of the two side magnets 341 that are far apart from each other have opposite polarities to the magnetic poles at the ends of the two center magnets 331 that are far apart from each other.

[0143] In this embodiment, as Figure 6 As shown, by configuring the side magnet 34 as two side magnets 341 stacked along the first direction and a side magnetic guide plate 342 disposed between the two side magnets 341, the two side magnets 341 respectively form magnetic circuits with the two center magnets 331, and the side magnetic guide plate 342 between the two side magnets 341 gathers and guides the magnetic field lines of the two magnetic circuits through the voice coil 22 located in the magnetic gap 35, thereby increasing the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, thereby improving the performance and improving the acoustic performance of the sound generating device 100.

[0144] Optionally, the two side magnets 341 and the side magnetic plate 342 of the side magnetic part 34 have similar structural outlines. That is, when the side magnetic part 34 is an integral ring structure, both side magnets 341 and the side magnetic plate 342 are integral ring structures. Alternatively, when the side magnetic part 34 is a split structure, both side magnets 341 and the side magnetic plate 342 are split structures, and they correspond one-to-one. Of course, in other embodiments, the structures of the two side magnets 341 and the side magnetic plate 342 of the side magnetic part 34 can also be different. For example, one of the two side magnets 341 and the side magnetic plate 342 may be an integral ring, and the other may be a split structure. This is not limited here.

[0145] In one embodiment, the projection of the side magnetic plate 342 along a direction perpendicular to the first direction is located within the extension length of the voice coil 22 along the first direction.

[0146] In this embodiment, when the sound-generating device 100 is in the assembled state, that is, when the voice coil 22 is not vibrating, the projection of the side magnetic guide plate 342 along the direction perpendicular to the first direction is located between the top and bottom of the voice coil 22. This guides more magnetic lines of force through the voice coil 22, making the magnetic lines of force in the magnetic field where the voice coil 22 is located more uniform. This ensures that the magnetic force experienced by the voice coil 22 remains unchanged or changes very little when it vibrates, and makes the magnetic lines of force distribution in the magnetic circuit system 3 more uniform and the BL(x) curve flatter, thereby reducing distortion.

[0147] Optionally, the thickness of the side magnetic plate 342 along the first direction is less than the extension length of the voice coil 22 along the first direction, and not less than 1 / 5 of the extension length of the voice coil 22 along the first direction. This arrangement ensures that the magnetic field lines gathered by the side magnetic plate 342 pass through the voice coil 22 located within the magnetic gap 35, thereby increasing the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, and thus improving performance and acoustic performance of the sound-generating device 100.

[0148] In one embodiment, the projection of the side magnetic plate 342 along a direction perpendicular to the first direction is located between the surfaces of the first central magnet 3311 and the second central magnet 3312 facing the diaphragm assembly 21.

[0149] In this embodiment, as Figure 6 As shown, by placing the side magnetic plate 342 of the side magnetic part 34 along a projection perpendicular to the first direction between the surfaces of the first center magnet 3311 and the second center magnet 3312 facing the diaphragm assembly 21, it is ensured that the side magnetic part 34 can form a magnetic circuit with the first center magnet 3311 and the second center magnet 3312 respectively, so that more magnetic lines of force pass through the voice coil 22, thereby increasing the magnetic field strength, effectively improving the BL value, making the magnetic lines of force distribution more uniform, and the BL(x) curve flatter, thereby reducing distortion.

[0150] In another embodiment, the side magnet 34 includes a side magnet 341 disposed between the first diaphragm 211 and the second diaphragm 212. The side magnet 341 is located outside the voice coil 22, and the surfaces of the side magnet 341 facing the first diaphragm 211 and the second diaphragm 212 are both exposed inside the third cavity 13.

[0151] In this embodiment, as Figure 7As shown, by setting the side magnet 34 as a single side magnet 341, that is, only one side magnet 341 along the first direction, the side magnet 341 forms a magnetic circuit with the two central magnets 331 respectively, and the magnetic field lines are concentrated and guided through the voice coil 22 located in the magnetic gap 35, thereby increasing the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, and thus improving the performance and acoustic performance of the sound generating device 100. At the same time, the side washer of the side magnet 34 is eliminated, thereby reducing the thickness of the sound generating device 100 in the Z direction.

[0152] Optionally, the side magnet 341 is magnetized in a direction perpendicular to the first direction, and the polarity of the magnetic pole of the side magnet 341 facing the voice coil 22 is the same as the polarity of the magnetic poles at the ends of the two central magnets 331 that are far apart from each other. It can be understood that the magnetization direction of the side magnet 341 is perpendicular to the magnetization direction of the central magnets 331.

[0153] Understandably, in order to further concentrate and guide the magnetic field lines of the magnetic circuit through the voice coil 22 located within the magnetic gap 35, a side magnetic guide plate 342 is provided on the side of the side magnet 341 facing the voice coil 22. In this embodiment, the thickness of the side magnetic guide plate 342 along the first direction is not greater than the thickness of the side magnet 341 along the first direction. Optionally, the length of the side magnetic guide plate 342 perpendicular to the first direction is not greater than 1 / 2 of the length of the side magnet 341 perpendicular to the first direction.

[0154] In this embodiment, the thickness of the side magnet 341 along the first direction is less than the extension length of the voice coil 22 along the first direction, and not less than 1 / 5 of the extension length of the voice coil 22 along the first direction. Optionally, the thickness of the side magnet 341 along the first direction is less than the thickness of the center magnet 331 along the first direction, and not less than 1 / 5 of the thickness of the center magnet 331 along the first direction. This arrangement ensures that the side magnet 341 and the two center magnets 331 form a magnetic circuit, and concentrates and guides the magnetic field lines through the voice coil 22 located within the magnetic gap 35, thereby increasing the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, and thus improving performance and acoustic performance of the sound-generating device 100. No limitation is imposed here.

[0155] In one embodiment, the side magnet portion 34 further includes a side magnetic guide plate 342 disposed on the side of the side magnet 341 facing the voice coil 22. It can be understood that by providing the side magnetic guide plate 342 on the side of the side magnet 341 facing the voice coil 22, the magnetic field lines of the magnetic circuit formed by the side magnet 341 and the two central magnets 331 are further concentrated by the side magnetic guide plate 342 and pass through the voice coil 22 in the magnetic gap 35, thereby increasing the magnetic field driving force acting on the voice coil 22 and improving the BL value.

[0156] Optionally, the thickness of the side magnetic plate 342 along the first direction is less than the extension length of the voice coil 22 along the first direction, and not less than 1 / 5 of the extension length of the voice coil 22 along the first direction. In this embodiment, the thickness of the side magnetic plate 342 along the first direction is not greater than the thickness of the side magnet 341 along the first direction.

[0157] In order to ensure the magnetic field strength of the side magnet 341, and to ensure the magnetic field strength of the magnetic circuit formed by the side magnet 341 and the two center magnets 331, in one embodiment, the extension length of the side magnetic plate 342 perpendicular to the first direction is not greater than 1 / 2 of the extension length of the side magnet 341 perpendicular to the first direction.

[0158] In another embodiment, the side magnetic part 34 includes a side magnetic plate 342 disposed between the first diaphragm 211 and the second diaphragm 212. The side magnetic plate 342 is located outside the voice coil 22, and the surfaces of the side magnetic plate 342 facing the first diaphragm 211 and the second diaphragm 212 are both exposed in the third cavity 13.

[0159] In this embodiment, as Figure 8 As shown, by setting the side magnetic part 34 as a side magnetic guiding plate 342, that is, only one side magnetic guiding plate 342 along the first direction, the magnetic field lines of the magnetic circuit formed by the two central magnets 331 are gathered and guided through the voice coil 22 located in the magnetic gap 35 by the side magnetic guiding plate 342, thereby increasing the driving force of the magnetic field acting on the voice coil 22, effectively increasing the BL value, and thus improving the performance and acoustic performance of the sound generating device 100. At the same time, the thickness of the sound generating device 100 in the Z direction is reduced.

[0160] Optionally, the thickness of the side magnetic plate 342 along the first direction is less than the length of the voice coil 22 along the first direction, and not less than 1 / 10 of the length of the voice coil 22 along the first direction. Optionally, the thickness of the side magnetic plate 342 along the first direction is less than the thickness of the central magnet 331 along the first direction, and not less than 1 / 10 of the thickness of the central magnet 331 along the first direction.

[0161] In one embodiment, the magnetic circuit system 3 further includes a first magnetic yoke 31 and a second magnetic yoke 32 disposed opposite to each other. The two central magnets 331 include a first central magnet 3311 and a second central magnet 3312. The side of the first central magnet 3311 facing away from the diaphragm 213 is connected to the first magnetic yoke 31, and the side of the second central magnet 3312 facing away from the diaphragm 213 is connected to the second magnetic yoke 32. A first cavity 314 is formed between the first diaphragm 211, the voice coil 22, and the diaphragm 213 and the first magnetic yoke 31. A second cavity 324 is formed between the second diaphragm 212, the voice coil 22, and the diaphragm 213 and the second magnetic yoke 32. The first magnetic yoke 31 and the second magnetic yoke 32 are respectively provided with a first sound outlet 313 and a second sound outlet 323.

[0162] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, by setting the first magnetic yoke 31 and the second magnetic yoke 32 so that the first magnetic yoke 31 and the second magnetic yoke 32 are arranged opposite to each other, the first magnetic yoke 31 and the second magnetic yoke 32 can be used to install and fix the two central magnets 331 respectively, and at the same time, the magnetic lines of force of the two central magnets 331 are concentrated to form a magnetic circuit.

[0163] Understandably, the side of the first central magnet 3311 facing away from the vibrating plate 213 is connected to the first magnetic yoke 31, and the side of the second central magnet 3312 facing away from the vibrating plate 213 is connected to the second magnetic yoke 32. Optionally, the projected area of ​​the first magnetic yoke 31 along the first direction is greater than or equal to the projected area of ​​the first central magnet 3311 along the first direction, and the projected area of ​​the second magnetic yoke 32 along the first direction is greater than or equal to the projected area of ​​the second central magnet 3312 along the first direction. This not only achieves the installation and fixation of the first central magnet 3311 and the second central magnet 3312, but also achieves a magnetic focusing effect.

[0164] In this embodiment, as Figures 4 to 10 As shown, a first cavity 314 is formed between the first diaphragm 211, voice coil 22, and diaphragm 213 and the first magnetic yoke 31, and a second cavity 324 is formed between the second diaphragm 212, voice coil 22, and diaphragm 213 and the second magnetic yoke 32, such that the first central magnet 3311 is located within the first cavity 314, and the second central magnet 3312 is located within the second cavity 324. It is understood that the first magnetic yoke 31 has a first sound outlet 313 communicating with the first cavity 314, and the second magnetic yoke 32 has a second sound outlet 323 communicating with the second cavity 324, thus enabling dual-sided sound emission from the sound-generating device 100.

[0165] To improve sound production, ensure smooth airflow within the first cavity 314 and the second cavity 324, and reduce weight, the first magnetic yoke 31 is provided with multiple first sound outlet holes 313, which are spaced apart. The second magnetic yoke 32 is provided with multiple second sound outlet holes 323, which are spaced apart, but not limited here.

[0166] In one embodiment, the first magnetic yoke 31 has a first recessed groove corresponding to the first central magnet 3311, and the first central magnet 3311 is disposed in the first recessed groove. It is understood that this arrangement allows for the positioning and installation of the first central magnet 3311 using the first recessed groove, improving installation stability. Furthermore, it reduces the assembly height between the first central magnet 3311 and the first magnetic yoke 31, increasing the vibration space of the vibrating plate 213.

[0167] In this embodiment, the first recessed groove can be formed by the recess of the first magnetic yoke 31 facing the first central magnet 3311, in which case the first magnetic yoke 31 is flat against the first central magnet 3311; or, the first recessed groove can be formed by bending the first magnetic yoke 31 toward the side away from the first central magnet 3311, in which case the side of the first magnetic yoke 31 opposite to the first central magnet 3311 is raised at the position of the first recessed groove, which is not limited here.

[0168] In one embodiment, the second magnetic yoke 32 has a second recessed groove corresponding to the second central magnet 3312, and the second central magnet 3312 is disposed within the second recessed groove. It is understood that this arrangement allows for the positioning and installation of the second central magnet 3312 using the second recessed groove, improving installation stability. Furthermore, it reduces the assembly height between the second central magnet 3312 and the second magnetic yoke 32, increasing the vibration space of the vibrating plate 213.

[0169] In this embodiment, the second recessed groove can be formed by the second magnetic yoke 32 being recessed on the side facing the second central magnet 3312, in which case the second magnetic yoke 32 is planar on the side away from the second central magnet 3312; or, the second recessed groove can be formed by bending the second magnetic yoke 32 toward the side away from the second central magnet 3312, in which case the side of the second magnetic yoke 32 away from the second central magnet 3312 is raised at the position of the second recessed groove, which is not limited here.

[0170] In one embodiment, the sound-generating device 100 further includes a housing 1, which is located between the first magnetic yoke 31 and the second magnetic yoke 32. The outer peripheries of the first diaphragm 211 and the second diaphragm 212 are respectively connected to the housing 1. The side magnetic part 34 is located between the first diaphragm 211 and the second diaphragm 212 and is connected to the housing 1. The housing 1, the first diaphragm 211, the voice coil 22 and the second diaphragm 212 cooperate to form a third cavity 13. The sound-generating device 100 is provided with a vent 14 communicating with the third cavity 13.

[0171] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, the housing 1 is provided to mount and fix the magnetic circuit system 3 and the vibration system 2. It is understood that the housing 1 is located between the first magnetic yoke 31 and the second magnetic yoke 32 along the first direction. The first magnetic yoke 31 / second magnetic yoke 32 can be connected to the housing 1 directly or indirectly, which is not limited here.

[0172] Understandably, the outer peripheries of the first diaphragm 211 and the second diaphragm 212 are respectively connected to the outer shell 1, and the side magnet 34 is located between the first diaphragm 211 and the second diaphragm 212 and connected to the outer shell 1. In this way, the outer shell 1, the first diaphragm 211, the first frame 231 or support 24, the voice coil 22, the second frame 232 or support 24, and the second diaphragm 212 cooperate to form the third cavity 13. In order to ensure the air pressure balance on the opposite sides of the first diaphragm 211 and the second diaphragm 212, the sound-generating device 100 is provided with a vent 14 communicating with the third cavity 13.

[0173] Optionally, the outer casing 1 is provided with a vent 14. Of course, in other embodiments, the vent 14 can also be formed by the outer casing 1 and the edge magnetic portion 34. In one embodiment, such as... Figure 1 As shown, the outer casing 1 is provided with a mounting hole 15, and the side magnetic part 34 is provided in the mounting hole 15 and surrounds the mounting hole 15 to form a vent hole 14.

[0174] Understandably, the outer casing 1 can be a frame structure or frame with openings at both ends. In this case, the first magnetic yoke 31 is connected to one end of the outer casing 1, and the second magnetic yoke 32 is located at the end of the outer casing 1 away from the first magnetic yoke 31. Optionally, the outer casing 1 can be made of metal or plastic.

[0175] In one embodiment, the outer shell 1 includes a first shell 11 and a second shell 12 disposed along a first direction. The two ends of the first shell 11 are respectively connected to the side magnetic part 34 and the first magnetic yoke 31, and the two ends of the second shell 12 are respectively connected to the side magnetic part 34 and the second magnetic yoke 32. A vent hole 14 is provided between the first shell 11 or the second shell 12 or between the first shell 11 and the second shell 12.

[0176] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, by setting the outer shell 1 as a split structure, the first shell 11 and the second shell 12 are arranged along the first direction. The two ends of the first shell 11 are connected to the side magnetic part 34 and the first magnetic yoke 31, respectively, and the two ends of the second shell 12 are connected to the side magnetic part 34 and the second magnetic yoke 32, respectively. This achieves the connection and fixation between the outer shell 1 and the magnetic circuit system 3. Optionally, the side magnetic part 34 is sandwiched between the first shell 11 and the second shell 12, and the outer surface of the side magnetic part 34 is flush with the outer surfaces of the first shell 11 and the second shell 12; this helps to reduce the radial dimension of the sound-generating device 100 and facilitates miniaturization design.

[0177] It is understood that the vent 14 may be provided in the first housing 11; or, the vent 14 may be provided in the second housing 12; or, both the first housing 11 and the second housing 12 may be provided with the vent 14; or, the first housing 11 and the second housing 12 may cooperate to form the vent 14, that is, the vent 14 may be provided between the first housing 11 and the second housing 12, which is not limited here.

[0178] Optionally, the vent holes 14 include multiple vent holes 14, which are spaced apart. Understandably, this arrangement can improve the airflow within the third cavity 13.

[0179] In one embodiment, the first magnetic yoke 31 includes a first top plate portion 311 and a first side plate portion 312 arranged at an angle. A first central magnet 3311 is disposed on the first top plate portion 311. The outer periphery of the first diaphragm 211 is sandwiched between the first side plate portion 312 and the outer shell 1, specifically sandwiched between the first side plate portion 312 and the first shell 11, and is opposite to and spaced from the first top plate portion 311. The second magnetic yoke 32 includes a second top plate portion 321 and a second side plate portion 322 arranged at an angle. A second central magnet 3312 is disposed on the second top plate portion 321. The outer periphery of the second diaphragm 212 is sandwiched between the second side plate portion 322 and the outer shell 1, specifically sandwiched between the second side plate portion 322 and the second shell 12, and is opposite to and spaced from the second top plate portion 321.

[0180] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, by setting the first magnetic yoke 31 as a first top plate portion 311 and a first side plate portion 312 arranged at an angle, the first side plate portion 312 cooperates with the first housing 11 to clamp the outer periphery of the first diaphragm 211, thereby improving the connection reliability of the first diaphragm 211. Furthermore, the first housing 11 supports the first diaphragm 211 away from the edge magnetic portion 34, thus providing vibration space for the first diaphragm 211.

[0181] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figures 6 to 8 As shown, by setting the second magnetic yoke 32 as a second top plate portion 321 and a second side plate portion 322 arranged at an angle, the second side plate portion 322 cooperates with the second housing 12 to clamp the outer periphery of the second diaphragm 212, thereby improving the connection reliability of the second diaphragm 212. Furthermore, the second housing 12 supports the second diaphragm 212 away from the side magnetic portion 34, thus providing vibration space for the second diaphragm 212.

[0182] In one embodiment, the first top plate portion 311 and / or the first side plate portion 312 are provided with a first sound outlet 313.

[0183] Understandably, a first cavity 314 is formed between the first magnetic yoke 31, the first diaphragm 211, and the vibrating plate 213. The first cavity 314 provides vibration space for the first diaphragm 211 and installation space for the first central magnet 3311. In order to enable the first diaphragm 211 to produce sound smoothly during vibration, the sound-producing device 100 is also provided with a first sound outlet 313 communicating with the first cavity 314.

[0184] In this embodiment, the first top plate portion 311 of the first magnetic yoke 31 is provided with a first sound outlet 313. Alternatively, the first side plate portion 312 of the first magnetic yoke 31 is provided with a first sound outlet 313. Alternatively, both the first top plate portion 311 and the first side plate portion 312 of the first magnetic yoke 31 are provided with first sound outlet 313, which is not limited here.

[0185] Optionally, the first top plate portion 311 is provided with a plurality of first sound outlet holes 313, which are spaced apart. In this embodiment, as shown... Figures 1 to 4 , Figures 6 to 8 As shown, a plurality of first sound outlet holes 313 are spaced apart and arranged around the first central magnet 3311. Optionally, all of the plurality of first sound outlet holes 313 are opposite to the folded ring portion 2112 of the first diaphragm 211. This arrangement facilitates the smooth and rapid flow of sound waves in the first cavity 314, thereby improving the sound production effect.

[0186] Optionally, the first side plate portion 312 is provided with a plurality of first sound outlet holes 313, which are spaced apart. By providing a plurality of first sound outlet holes 313, all of the plurality of first sound outlet holes 313 are connected to the first cavity 314, thereby increasing the radiation speed and area of ​​the first sound wave in the first cavity 314, improving the sound output effect, and at the same time reducing weight.

[0187] In one embodiment, the second top plate portion 321 and / or the second side plate portion 322 are provided with a second sound outlet 323.

[0188] Understandably, a second cavity 324 is formed between the second magnetic yoke 32, the second diaphragm 212, and the vibrating plate 213. The second cavity 324 provides vibration space for the second diaphragm 212 and installation space for the second central magnet 3312. In order to enable the second diaphragm 212 to produce sound smoothly during vibration, the sound-producing device 100 is also provided with a second sound outlet 323 communicating with the second cavity 324.

[0189] In this embodiment, the second top plate portion 321 of the second magnetic yoke 32 is provided with a first sound outlet 313. Alternatively, the second side plate portion 322 of the second magnetic yoke 32 is provided with a first sound outlet 313. Alternatively, both the second top plate portion 321 and the second side plate portion 322 of the second magnetic yoke 32 are provided with a first sound outlet 313, which is not limited here.

[0190] Optionally, the second top plate portion 321 is provided with a plurality of second sound outlet holes 323, which are spaced apart. In this embodiment, as shown... Figure 3 , Figure 4 , Figures 6 to 8 As shown, a plurality of second sound outlets 323 are spaced apart and arranged around the second central magnet 3312. Optionally, all of the plurality of second sound outlets 323 are opposite to the folded ring portion 2112 of the second diaphragm 212. This arrangement facilitates smooth and rapid airflow of sound waves in the second cavity 324, thereby improving the sound production effect.

[0191] Optionally, the second side plate portion 322 is provided with a plurality of second sound outlet holes 323, which are spaced apart. By providing a plurality of second sound outlet holes 323, all of the plurality of second sound outlet holes 323 are connected to the second cavity 324, thereby increasing the radiation speed and area of ​​the second sound wave in the second cavity 324, improving the sound output effect, and at the same time reducing weight.

[0192] It should be noted that the first sound outlet 313 of the sound-generating device 100 is located on the first top plate portion 311 and faces the first diaphragm 211, while the second sound outlet 323 is located on the second top plate portion 321 and faces the second diaphragm 212. When the sound-generating device 100 is applied to an electronic device or a sound-generating module, the housing of the electronic device or the sound-generating module is provided with sound outlets that are directly opposite the first sound outlet 313 and the second sound outlet 323, respectively. This allows the electronic device or the sound-generating module to have a positive sound-emitting structure, that is, the sound waves emitted by the sound-generating device 100 from the first sound outlet 313 and the second sound outlet 323 form a dipole, thereby effectively reducing sound leakage.

[0193] Of course, in other embodiments, when the first sound outlet 313 of the sound-emitting device 100 is located on the first side plate portion 312 and the second sound outlet 323 is located on the second side plate portion 322, when the sound-emitting device 100 is applied to an electronic device or a sound-emitting module, the sound outlet on the housing of the electronic device or the sound-emitting module is located on one side of the sound-emitting device 100, so that the sound outlet is connected to the first sound outlet 313 / second sound outlet 323 through the sound outlet channel, thereby making the electronic device or the sound-emitting module have a side-emitting structure.

[0194] In one embodiment, the vibration system 2 further includes a centering support 25 disposed in the third cavity 13. The centering support 25 includes an outer fixing part 251, an inner fixing part 252, and a spring arm part 253 connecting the outer fixing part 251 and the inner fixing part 252. The outer fixing part 251 is connected to the outer shell 1, and the inner fixing part 252 is connected to the voice coil 22.

[0195] In this embodiment, as Figure 1 and Figure 3As shown, by setting a centering support 25, one end of the centering support 25 is connected to the outer shell 1, and the other end of the centering support 25 is connected to the voice coil 22. In this way, the centering support 25 can be used to center the voice coil 22, so as to prevent the voice coil 22 from being polarized or oscillating during vibration, and improve the operational stability of the vibration system 2.

[0196] Understandable, such as Figure 3 As shown, by configuring the centering support 25 as an outer fixing part 251, a spring arm part 253, and an inner fixing part 252, the outer fixing part 251 is connected to the outer casing 1, and the inner fixing part 252 is provided with a first solder pad. Thus, when the inner fixing part 252 is connected to the voice coil 22, the lead of the voice coil 22 is electrically connected to the first solder pad, thereby enabling the external circuit to be connected and conductive with the voice coil 22 using the centering support 25. Optionally, the spring arm part 253 has at least one bent section.

[0197] Optionally, the outer fixing part 251 of the centering support 25 is clamped between the first housing 11 and the second housing 12 of the outer shell 1.

[0198] It should be noted that there can be one or more centering supports 25. When there is one centering support 25, the outer fixing part 251 of the centering support 25 is annular, and the spring arm part 253 and the inner fixing part 252 include multiple parts, such as two or four spring arm parts 253 and four inner fixing parts 252, etc., which is not limited here. When there are multiple centering supports 25, the outer fixing part 251, spring arm 253 and inner fixing part 252 all include multiple parts. In this case, there can be two or four centering supports 25. For example, when there are two centering supports 25, the two centering supports 25 are symmetrically arranged and distributed along the long axis or short axis of the outer shell 1; or, when there are four centering supports 25, the four centering supports 25 are arranged corresponding to the four corners of the outer shell 1, which is not limited here.

[0199] In one embodiment, the voice coil 22 includes two long sides 221 and two short sides 222 connected end to end. The side magnets 34 include two side magnets 34, which are symmetrically arranged on opposite sides of the voice coil 22 and are respectively opposite to and spaced apart from the two long sides 221. The two side magnets 34 extend along the extension direction of the long sides 221.

[0200] Of course, in other embodiments, the side magnetic parts 34 include four, with two side magnetic parts 34 facing and spaced apart from the two long sides 221, and the other two side magnetic parts 34 facing and spaced apart from the two short sides 222, which is not limited here.

[0201] In this embodiment, as Figures 3 to 8 As shown, the side magnet 34 includes two parts, which are symmetrically arranged on opposite sides of the voice coil 22 and are respectively opposite to and spaced apart from the two long sides 221. The two side magnets 34 extend along the extension direction of the long sides 221.

[0202] When the centering support 25 includes one, the outer fixing part 251 is annular, and the spring arm part 253 and the inner fixing part 252 each include four. The two ends of each spring arm part 253 are respectively connected to the outer fixing part 251 and an inner fixing part 252. The four spring arm parts 253 and the four inner fixing parts 252 are all located inside the outer fixing part 251, and two spring arm parts 253 and two inner fixing parts 252 are correspondingly arranged with one short side 222, and the other two spring arm parts 253 and the other two inner fixing parts 252 are correspondingly arranged with another short side 222.

[0203] When there are two centering support plates 25, each centering support plate 25 is respectively provided corresponding to the two short sides 222. It can be understood that each centering support plate 25 includes an outer fixing part 251, at least one spring arm part 253 and two inner fixing parts 252, which is not limited here.

[0204] When there are four centering support plates 25, two centering support plates 25 are correspondingly arranged with the two ends of one short side 222, and the other two centering support plates 25 are correspondingly arranged with the two ends of the other short side 222. It can be understood that each centering support plate 25 includes an outer fixing part 251, a spring arm part 253 and an inner fixing part 252, which is not limited here.

[0205] In this embodiment, there are four spring arm portions 253 and four inner fixing portions 252. The two ends of each spring arm portion 253 are connected to the outer fixing portion 251 and an inner fixing portion 252, respectively. Two spring arm portions 253 and two inner fixing portions 252 are correspondingly arranged with one short side 222, and the other two spring arm portions 253 and the other two inner fixing portions 252 are correspondingly arranged with the other short side 222.

[0206] The present invention also proposes an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 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.

[0207] Optionally, the aforementioned electronic device may be a mobile phone, earphones, computer, PAD, smart wearable device, etc., and the present invention does not impose specific limitations on it.

[0208] In this embodiment, the electronic device is provided with a mounting cavity and a first sound outlet and a second sound outlet communicating with the mounting cavity. The sound-emitting device 100 is disposed in the mounting cavity. The first sound outlet 313 of the sound-emitting device 100 is communicating with the first sound outlet, and the second sound outlet 323 of the sound-emitting device 100 is communicating with the second sound outlet.

[0209] Understandably, the electronic device also includes a device housing, which has a mounting cavity and a first sound outlet and a second sound outlet communicating with the mounting cavity. The sound-emitting device 100 is located in the mounting cavity of the device housing, and the first sound outlet 313 of the sound-emitting device 100 is communicating with the first sound outlet, and the second sound outlet 323 of the sound-emitting device 100 is communicating with the second sound outlet.

[0210] In one embodiment, the electronic device is smart glasses. The smart glasses include temples, which are provided with a mounting cavity, a first sound outlet, and a second sound outlet. The first sound outlet and the second sound outlet are located on two opposing surfaces of the temples along a first direction, and one of the surfaces faces the user's ear.

[0211] It is understood that smart glasses can be AR / VR / MR glasses, etc., and are not limited here. In this embodiment, by setting the sound-emitting device 100 in the mounting cavity of the temple of the glasses, the sound-emitting device 100 divides the mounting cavity of the temple of the glasses into two front cavities and one rear cavity. In order to facilitate sound output and venting, the temple of the glasses is also provided with a first sound outlet and a second sound outlet that respectively connect to the two front cavities, and a vent that connects to the rear cavity.

[0212] Optionally, the first sound outlet and the second sound outlet are located on two opposing surfaces of the temple along a first direction, with one of the surfaces facing the user's ear.

[0213] In this embodiment, the height of the temple is the height of the temple along the first direction, and the thickness of the temple is the thickness of the temple along the second direction. The height of the temple corresponds to the height of the sound-emitting device 100 along the first direction, and the thickness of the temple corresponds to the width of the sound-emitting device 100. It is understandable that by placing the first and second sound outlets on two opposite surfaces of the temple along the first direction, less space is occupied in the thickness direction of the temple, making the entire product thinner and improving the comfort of the user when wearing the smart glasses.

[0214] It should be noted that the first sound outlet 313 and the second sound outlet 323 of the sound-generating device 100 are respectively connected to the two front cavities, and the vent 14 of the sound-generating device 100 is connected to the rear cavity. In this way, the smart glasses can generate sound through the first and second sound outlets and vent through the vent. The sound waves radiated outward from the first and second sound outlets can be considered from a fixed position at a relatively far distance in the environment. Since the positions of the two sound waves are relatively close, it can be considered that the fixed position is approximately equidistant from the two sound waves. This causes the two sound waves to generate two sound fields of equal size and opposite phase. Therefore, the fixed position will receive two sound waves of equal size and opposite phase. According to the superposition effect of dipoles, the sound waves at the fixed position can cancel each other out to the greatest extent, which greatly improves the sound leakage problem of the smart glasses during use, protects the user's privacy, and improves the user experience.

[0215] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: A vibration system comprising a diaphragm assembly and a voice coil, the diaphragm assembly comprising a first diaphragm, a second diaphragm, and a vibrating plate, the first diaphragm and the second diaphragm both vibrating along a first direction, and the first diaphragm and the second diaphragm being spaced apart along the first direction and respectively connected to both ends of the voice coil along the first direction; the vibrating plate is located inside the voice coil, and the outer periphery of the vibrating plate abuts against the inner peripheral wall of the voice coil; and A magnetic circuit system includes a central magnetic section and a side magnetic section. The side magnetic section is disposed between the first diaphragm and the second diaphragm, and is located outside the voice coil. The central magnetic section includes two central magnets that are spaced apart and opposite to each other along a first direction. The two central magnets are located on both sides of the diaphragm along the first direction, and both central magnets are magnetized along the first direction but in opposite directions. The side magnetic section is a Helbeck magnetic circuit with a magnetic field enhancement side facing the voice coil. The side magnetic section and the central magnetic section cooperate to form a magnetic gap to accommodate the voice coil. The side magnetic section includes layers stacked along the first direction. The first, second, and third side magnets are arranged such that the first and third side magnets are magnetized along the first direction but in opposite directions, and the second side magnet is magnetized in a direction perpendicular to the first direction. The magnetic polarity of the second side magnet facing the voice coil is opposite to the magnetic polarity of the ends of the first and third side magnets that are far apart from each other, so that the first, second, and third side magnets form the Heilbeck magnetic circuit. The magnetic polarity of the first and third side magnets facing the second side magnet is the same as the magnetic polarity of the ends of the two central magnets that are far apart from each other. The sound-generating device comprises a first cavity and a second cavity located on both sides of the vibrating plate along the first direction. The two central magnets are exposed in the first cavity and the second cavity respectively on the side facing the vibrating plate. The sound-generating device also has a first sound outlet and a second sound outlet respectively connecting the first cavity and the second cavity.

2. The sound-generating device as described in claim 1, characterized in that, The sum of the thicknesses of the first side magnet, the second side magnet, and the third side magnet along the first direction is greater than the extension length of the voice coil along the first direction, but not greater than three times the extension length of the voice coil along the first direction. And / or, the projections of the two central magnets along the first direction are located inside the voice coil; And / or, the first diaphragm and the second diaphragm are arranged symmetrically with respect to the vibrating plate; And / or, the two central magnets are arranged symmetrically with respect to the vibrating plate; And / or, the voice coil is an integrally wound structure and extends along the first direction; or, the voice coil includes a first sub-voice coil and a second sub-voice coil disposed on opposite sides of the diaphragm, and the first diaphragm and the second diaphragm are respectively connected to the ends of the first sub-voice coil and the second sub-voice coil that are opposite to each other along the first direction; And / or, the periphery of the diaphragm bends and extends toward the inner surface of the voice coil to form an extension, the extension being connected to the inner surface of the voice coil.

3. The sound-generating device as described in claim 1, characterized in that, The vibration system further includes a first frame and a second frame, wherein the two ends of the first frame along the first direction are respectively connected to one end of the first diaphragm and one end of the voice coil, and the two ends of the second frame along the first direction are respectively connected to the other end of the second diaphragm and the voice coil. Both the first diaphragm and the second diaphragm include an inner connecting portion, a folded loop portion surrounding the inner connecting portion, and an outer connecting portion surrounding the folded loop portion. The inner connecting portion is connected to the end of the first frame or the second frame away from the voice coil.

4. The sound-generating device as described in claim 3, characterized in that, Both of the aforementioned folded ring portions protrude toward the edge magnetic portion; And / or, the sound-generating device further includes a housing, and the two external connecting parts are respectively connected to the two ends of the housing along the first direction; And / or, the first diaphragm and the vibrating plate radiate a first sound wave toward the first cavity, and the second diaphragm and the vibrating plate radiate a second sound wave toward the second cavity, wherein the first sound wave and the second sound wave are out of phase; And / or, one end of the first skeleton and / or the second skeleton adjacent to the inner connecting portion bends and extends toward the inner connecting portion to form a first bent portion, the first bent portion being connected to the inner connecting portion; And / or, the first skeleton and / or the second skeleton bend and extend at one end adjacent to the voice coil to form a second bend, the second bend being connected to the end of the voice coil; or, the first skeleton and / or the second skeleton extend along the inner surface of the voice coil at one end adjacent to the voice coil and are connected to the inner surface of the voice coil.

5. The sound-generating device as described in claim 1, characterized in that, The vibration system further includes a support, which is disposed inside the voice coil and extends along the first direction and protrudes from both ends of the voice coil along the first direction. The first diaphragm and the second diaphragm are respectively connected to both ends of the support along the first direction, and the outer periphery of the diaphragm is connected to the support. The bracket is bonded or welded to the vibrating plate. And / or, the bracket is bent and extended at both ends along the first direction to form edge portions, and the edge portions are connected to the first diaphragm or the second diaphragm.

6. The sound-generating device as claimed in claim 1, characterized in that, The magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other. The two central magnets include a first central magnet and a second central magnet. The side of the first central magnet facing away from the vibrating plate is connected to the first magnetic yoke, and the side of the second central magnet facing away from the vibrating plate is connected to the second magnetic yoke. The first cavity is formed between the first diaphragm, the voice coil, the vibrating plate, and the first magnetic yoke; the second cavity is formed between the second diaphragm, the voice coil, the vibrating plate, and the second magnetic yoke; and the first magnetic yoke and the second magnetic yoke are respectively provided with the first sound outlet and the second sound outlet.

7. The sound-generating device as described in claim 6, characterized in that, The sound-generating device further includes a housing, which is located between the first magnetic yoke and the second magnetic yoke. The outer peripheries of the first diaphragm and the second diaphragm are respectively connected to the housing. The side magnetic portion is located between the first diaphragm and the second diaphragm and is connected to the housing. The outer shell, the first diaphragm, the voice coil, and the second diaphragm together form a third cavity, and the sound-generating device is provided with a vent hole communicating with the third cavity.

8. The sound-generating device as claimed in claim 7, characterized in that, The outer casing includes a first casing and a second casing arranged along the first direction. The two ends of the first casing are respectively connected to the side magnetic part and the first magnetic yoke, and the two ends of the second casing are respectively connected to the side magnetic part and the second magnetic yoke. The vent hole is provided between the first housing, the second housing, or the first housing and the second housing.

9. The sound-generating device as claimed in claim 7, characterized in that, The first magnetic yoke includes a first top plate portion and a first side plate portion arranged at an angle, the first central magnet is disposed on the first top plate portion, and the outer periphery of the first diaphragm is sandwiched between the first side plate portion and the outer shell, and is opposite to and spaced from the first top plate portion; The second magnetic yoke includes a second top plate portion and a second side plate portion arranged at an angle, the second central magnet is disposed on the second top plate portion, and the outer periphery of the second diaphragm is sandwiched between the second side plate portion and the outer shell, and is opposite to and spaced from the second top plate portion; The first top plate portion and / or the first side plate portion are provided with the first sound outlet, and the second top plate portion and / or the second side plate portion are provided with the second sound outlet.

10. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 9; The electronic device is provided with a mounting cavity and a first sound outlet and a second sound outlet communicating with the mounting cavity. The sound-generating device is disposed in the mounting cavity, and the first sound outlet of the sound-generating device is communicating with the first sound outlet, and the second sound outlet of the sound-generating device is communicating with the second sound outlet.

11. The electronic device as claimed in claim 10, characterized in that, The electronic device is a smart glasses, which includes temples and has the mounting cavity, the first sound outlet and the second sound outlet. The first sound outlet and the second sound outlet are located on two opposing surfaces of the temple of the glasses along the first direction, and one of the surfaces faces the user's ear.

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