Sound production device and electronic device

Abstract

The utility model discloses a sound production device and electronic equipment relate to electric sound transduction technical field, the sound production device includes the first sound production unit and second sound production unit of opposite arrangement, the first vibration system of first sound production unit includes first diaphragm subassembly and first voice coil, and the first magnetic circuit system includes the first magnetic part and second magnetic part of being located the opposite both sides of first diaphragm subassembly, and first magnetic part and second magnetic part are corresponded to first voice coil and are equipped with first magnetic gap and second magnetic gap respectively, and the second vibration system of second sound production unit includes second diaphragm subassembly and second voice coil, and the second magnetic circuit system includes the third magnetic part and fourth magnetic part of being located the opposite both sides of second diaphragm subassembly, and third magnetic part and fourth magnetic part are corresponded to second voice coil and are equipped with third magnetic gap and fourth magnetic gap respectively. The sound production device of the utility model has lower distortion, can also effectively reduce the sound leakage problem of far field, has good acoustics.

Description

Technical Field

[0001] This utility model 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, the speakers used in smart glasses are generally placed inside the temples of the glasses near the ears. Due to the shape and structure of the temples, the sound outlet on the temples is usually a certain distance from the ear canal, which leads to a certain degree of attenuation of the loudness entering the ear canal. At the same time, 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 and poor privacy. Utility Model Content

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device, which aims to provide a sound-generating device that effectively improves acoustic performance. This sound-generating device has low distortion and can also effectively reduce sound leakage in the far field, thus exhibiting good acoustic performance.

[0005] To achieve the above objectives, this utility model proposes a sound-generating device, which includes a first sound-generating unit and a second sound-generating unit arranged back to back. The first sound-generating unit includes a first vibration system and a first magnetic circuit system, and the second sound-generating unit includes a second vibration system and a second magnetic circuit system. Both the first vibration system and the second vibration system vibrate along a first direction.

[0006] The first vibration system includes a first diaphragm assembly and a first voice coil connected to the first diaphragm assembly. The first magnetic circuit system includes a first magnetic part and a second magnetic part located on opposite sides of the first diaphragm assembly along the first direction. The first magnetic part has a first magnetic gap corresponding to one end of the first voice coil, and the second magnetic part has a second magnetic gap corresponding to the other end of the first voice coil.

[0007] The second vibration system includes a second diaphragm assembly and a second voice coil connected to the second diaphragm assembly. The second magnetic circuit system includes a third magnetic part and a fourth magnetic part located on opposite sides of the second diaphragm assembly along the first direction. The third magnetic part has a third magnetic gap corresponding to one end of the second voice coil, and the fourth magnetic part has a fourth magnetic gap corresponding to the other end of the second voice coil.

[0008] In one embodiment, the first voice coil includes a first sub-voice coil and a second sub-voice coil disposed on opposite sides of the first diaphragm assembly, wherein the first sub-voice coil is disposed corresponding to the first magnetic gap, and the second sub-voice coil is disposed corresponding to the second magnetic gap;

[0009] And / or, the second voice coil includes a third sub-voice coil and a fourth sub-voice coil disposed on opposite sides of the second diaphragm assembly, wherein the third sub-voice coil is disposed corresponding to the third magnetic gap, and the fourth sub-voice coil is disposed corresponding to the fourth magnetic gap.

[0010] In one embodiment, the first voice coil is an integrally wound structure and extends along the first direction;

[0011] And / or, the second voice coil is an integrally wound structure and extends along the first direction.

[0012] In one embodiment, the first diaphragm assembly includes a first diaphragm and a first diaphragm plate connected to the inner side of the first diaphragm; wherein the first diaphragm plate is an integrally formed structure; or, the first diaphragm plate includes a first inner diaphragm plate connected to the inner wall of the first voice coil and a first outer diaphragm plate connected to the outer wall of the first voice coil, wherein the first outer diaphragm plate is connected to the first diaphragm.

[0013] And / or, the second diaphragm assembly includes a second diaphragm and a second diaphragm plate connected to the inner side of the second diaphragm; wherein the second diaphragm plate is an integrally formed structure; or, the second diaphragm plate includes a second inner diaphragm plate connected to the inner wall of the second voice coil and a second outer diaphragm plate connected to the outer wall of the second voice coil, wherein the second outer diaphragm plate is connected to the second diaphragm.

[0014] In one embodiment, the first magnetic part includes a first magnetic plate and a first central magnet and a first side magnet disposed on the first magnetic plate. The first side magnet is located outside the first central magnet and is spaced apart from the first central magnet to form the first magnetic gap.

[0015] The second magnetic part includes a first support plate and a second central magnet and a second side magnet disposed on the first support plate. The second side magnet is located outside the second central magnet and is spaced apart from the second central magnet to form the second magnetic gap. The third magnetic part is connected to the side of the first support plate facing away from the first diaphragm assembly.

[0016] The sides of the first central magnet and the first side magnet facing the first diaphragm assembly are both exposed in the internal cavity of the first sound-generating unit; the sides of the second central magnet and the second side magnet facing the first diaphragm assembly are also exposed in the internal cavity of the first sound-generating unit.

[0017] In one embodiment, the first central magnet and the first side magnet are both magnetized along the first direction, and the magnetization directions are opposite; the second central magnet and the second side magnet are both magnetized along the first direction, and the magnetization directions are opposite; the first central magnet and the second central magnet are magnetized in opposite directions, the first side magnet and the second side magnet are magnetized in opposite directions, and the first magnetic gap and the second magnetic gap include a first magnetic field line dense region located between the first magnetic part and the second magnetic part along the first direction to accommodate the first voice coil;

[0018] And / or, the first central magnet and the second central magnet are symmetrically arranged with respect to the first diaphragm assembly;

[0019] And / or, the first side magnet and the second side magnet are symmetrically arranged with respect to the first diaphragm assembly;

[0020] And / or, the first side magnet includes two, and the two first side magnets are symmetrically arranged on opposite sides of the first central magnet;

[0021] And / or, the second side magnet includes two, and the two second side magnets are symmetrically arranged on opposite sides of the second central magnet;

[0022] And / or, the first voice coil is an integrally wound structure and extends along the first direction, the first voice coil has a height along the first direction and a thickness along a third direction, the first direction is perpendicular to the third direction, the height of the first voice coil is greater than the thickness of the first voice coil, the first magnetic gap includes a first gap located between the first center magnet and the first side magnet in the third direction, the second magnetic gap includes a second gap located between the second center magnet and the second side magnet in the third direction, and the thickness of the first voice coil is less than the width of the first gap and the second gap.

[0023] In one embodiment, the third magnetic part includes a second support plate and a third central magnet and a third side magnet disposed on the second support plate. The third side magnet is located outside the third central magnet and is spaced apart from the third central magnet to form the third magnetic gap. The side of the second support plate facing away from the second diaphragm assembly is connected to the side of the first support plate facing away from the first diaphragm assembly.

[0024] The fourth magnetic part includes a second magnetic plate and a fourth central magnet and a fourth side magnet disposed on the second magnetic plate. The fourth side magnet is located outside the fourth central magnet and is spaced apart from the fourth central magnet to form the fourth magnetic gap.

[0025] The third central magnet and the third side magnet are both exposed in the internal cavity of the second sound-generating unit on the side facing the second diaphragm assembly; the fourth central magnet and the fourth side magnet are both exposed in the internal cavity of the second sound-generating unit on the side facing the second diaphragm assembly.

[0026] In one embodiment, the third central magnet and the third lateral magnet are both magnetized along the first direction, and the magnetization directions are opposite; the fourth central magnet and the fourth lateral magnet are both magnetized along the first direction, and the magnetization directions are opposite; the magnetization directions of the third central magnet and the fourth central magnet are opposite, the magnetization directions of the third lateral magnet and the fourth lateral magnet are opposite, and the third magnetic gap and the fourth magnetic gap include a second magnetic field line dense region located between the third magnetic part and the fourth magnetic part along the first direction to accommodate the second voice coil;

[0027] And / or, the third central magnet and the fourth central magnet are symmetrically arranged with respect to the second diaphragm assembly;

[0028] And / or, the third side magnet and the fourth side magnet are symmetrically arranged with respect to the second diaphragm assembly;

[0029] And / or, the third side magnet includes two, and the two third side magnets are symmetrically arranged on opposite sides of the third central magnet;

[0030] And / or, the fourth side magnet includes two, and the two fourth side magnets are symmetrically arranged on opposite sides of the fourth central magnet;

[0031] And / or, the first support plate and the second support plate are integrally formed structures or separate structures; wherein, when the first support plate and the second support plate are separate structures, the first support plate and the second support plate are bonded or welded together.

[0032] And / or, the second voice coil is an integrally wound structure and extends along the first direction. The second voice coil has a height along the first direction and a thickness along a third direction. The first direction is perpendicular to the third direction. The height of the second voice coil is greater than the thickness of the second voice coil. The third magnetic gap includes a third gap located between the third center magnet and the third side magnet in the third direction. The fourth magnetic gap includes a fourth gap located between the fourth center magnet and the fourth side magnet in the third direction. The thickness of the second voice coil is less than the width of the third gap and the fourth gap.

[0033] In one embodiment, the first support plate and the second support plate are integrally formed flat plate structures;

[0034] Wherein, the second central magnet and the third central magnet are symmetrically arranged with respect to the plate structure, and the second side magnet and the third side magnet are symmetrically arranged with respect to the plate structure; and / or, the first diaphragm assembly and the second diaphragm assembly are symmetrically arranged with respect to the plate structure; and / or, the plate structure is made of a magnetically conductive material; or, the plate structure is made of a non-magnetically conductive material.

[0035] In one embodiment, the second central magnet and the third central magnet are both magnetized along the first direction, and the magnetization directions are the same; the second side magnet and the third side magnet are both magnetized along the first direction, and the magnetization directions are the same; the magnetization directions of the second central magnet and the third central magnet are opposite to the magnetization directions of the second side magnet and the third side magnet, so that the second magnetic part and the third magnetic part together form a single magnetic circuit that can simultaneously drive the first voice coil and the second voice coil;

[0036] Both the first central magnet and the fourth central magnet are magnetized along the first direction, and the magnetization directions are the same; both the first side magnet and the fourth side magnet are magnetized along the first direction, and the magnetization directions are the same; the magnetization directions of the first central magnet and the fourth central magnet are opposite to the magnetization directions of the first side magnet and the fourth side magnet.

[0037] The magnetization directions of the first central magnet and the fourth central magnet are opposite to those of the second central magnet and the third central magnet, and the magnetization directions of the first side magnet and the fourth side magnet are opposite to those of the second side magnet and the third side magnet.

[0038] In one embodiment, the first support plate and the second support plate are integrally formed flat plate structures;

[0039] Wherein, the second central magnet and the third central magnet are integrally formed first magnet structures, the plate structure is provided with a first through hole corresponding to the first magnet structure, and the first magnet structure passes through the first through hole; and / or, the second side magnet and the third side magnet are integrally formed second magnet structures, the plate structure is provided with a second through hole corresponding to the second magnet structure, and the second magnet structure passes through the second through hole.

[0040] In one embodiment, the outer periphery of the first magnetic plate is bent and extended toward the second magnetic plate to form a first welding part, and the first welding part is welded to the outer periphery of the second magnetic plate.

[0041] And / or, the outer periphery of the second magnetic plate bends and extends toward the first magnetic plate to form a second welding part, and the second welding part is welded to the outer periphery of the first magnetic plate;

[0042] And / or, the outer periphery of the first magnetic plate bends and extends toward the second magnetic plate to form a first welding part, and the outer periphery of the second magnetic plate bends and extends toward the first magnetic plate to form a second welding part, and the first welding part and the second welding part are welded together.

[0043] In one embodiment, the first sound-generating unit further includes a first housing, the two ends of which are respectively connected to the first magnetic plate and the first support plate, and the outer periphery of the first diaphragm assembly is connected to the first housing;

[0044] The second sound-generating unit also includes a second housing, the two ends of which are respectively connected to the second magnetic plate and the second support plate, and the outer periphery of the second diaphragm assembly is connected to the second housing;

[0045] Wherein, the first housing and the second housing are integrally formed structures and extend along the first direction; and / or, the first diaphragm assembly includes a first folded ring extending toward the second magnet, and the inner wall of the first housing is spaced apart from the second side magnet to form a first clearance gap to avoid the first folded ring; and / or, the second diaphragm assembly includes a second folded ring extending toward the third magnet, and the inner wall of the second housing is spaced apart from the third side magnet to form a second clearance gap to avoid the second folded ring.

[0046] In one embodiment, a first cavity is formed between the first diaphragm assembly and the first magnet, and a second cavity is formed between the first diaphragm assembly and the second magnet.

[0047] A third cavity is formed between the second diaphragm assembly and the third magnet, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnet.

[0048] The first outer shell is provided with a first sound outlet hole communicating with the second cavity, the second outer shell is provided with a second sound outlet hole communicating with the third cavity, the first magnetic plate is provided with a third sound outlet hole communicating with the first cavity, and the second magnetic plate is provided with a fourth sound outlet hole communicating with the fourth cavity.

[0049] In one embodiment, a first cavity is formed between the first diaphragm assembly and the first magnet, and a second cavity is formed between the first diaphragm assembly and the second magnet.

[0050] A third cavity is formed between the second diaphragm assembly and the third magnet, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnet.

[0051] Wherein, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity and the fourth cavity;

[0052] Alternatively, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity and the fourth cavity.

[0053] In one embodiment, the first diaphragm assembly radiates a first sound wave toward the first cavity, and the first diaphragm assembly radiates a second sound wave toward the second cavity, wherein the first sound wave and the second sound wave are out of phase.

[0054] The second diaphragm assembly radiates a third sound wave into the third cavity and a fourth sound wave into the fourth cavity, wherein the third sound wave and the fourth sound wave are out of phase.

[0055] Wherein, the second sound wave and the third sound wave are in phase, and the first sound wave and the fourth sound wave are in phase; or, the first sound wave and the third sound wave are in phase, and the second sound wave and the fourth sound wave are in phase.

[0056] In one embodiment, the first magnetic plate includes a first main body and two first recessed edges disposed on opposite sides of the first main body. The first central magnet and the first side magnet are disposed on the first main body. The two first recessed edges are close to the first diaphragm assembly and connected to the first housing. The outer periphery of the first diaphragm assembly is sandwiched between the first recessed edges and the first housing.

[0057] And / or, the second magnetic plate includes a second main body and two second recessed edges disposed on opposite sides of the second main body, the fourth central magnet and the fourth side magnet are disposed on the second main body, the two second recessed edges are close to the second diaphragm assembly and connected to the second housing, and the outer periphery of the second diaphragm assembly is sandwiched between the second recessed edges and the second housing.

[0058] In one embodiment, the first housing has a first clearance portion, and the first diaphragm assembly has a second clearance portion corresponding to the first clearance portion, so that the first diaphragm assembly is formed as an asymmetrical structure; wherein, the first clearance portion and the second clearance portion are chamfered or concave arc-shaped curved surfaces;

[0059] And / or, the second housing has a third clearance portion, and the second diaphragm assembly has a fourth clearance portion corresponding to the third clearance portion, so that the second diaphragm assembly is formed as an asymmetrical structure; wherein, the third clearance portion and the fourth clearance portion are chamfered or concave arc-shaped curved surfaces.

[0060] In one embodiment, the first vibration system further includes a first centering support, the first centering support including a first outer fixing part, a first inner fixing part and a first elastic arm part connecting the first outer fixing part and the first inner fixing part, the first outer fixing part being connected to the first outer shell, and the first inner fixing part being connected to the end of the first voice coil facing the first magnet.

[0061] The second vibration system further includes a second centering support, which includes a second outer fixing part, a second inner fixing part, and a second spring arm part connecting the second outer fixing part and the second inner fixing part. The second outer fixing part is connected to the second outer shell, and the second inner fixing part is connected to one end of the second voice coil facing the fourth magnet.

[0062] In one embodiment, the distance between the end face of the first voice coil facing the first magnet and the first magnet is the same as the distance between the end face of the first voice coil facing the second magnet and the second magnet.

[0063] And / or, the distance between the end face of the second voice coil facing the third magnet and the third magnet is the same as the distance between the end face of the second voice coil facing the fourth magnet and the fourth magnet.

[0064] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0065] In one embodiment, the electronic device includes a device housing, and the sound-generating device is disposed within the device housing; a first cavity is formed between the first diaphragm assembly and the first magnet, a second cavity is formed between the first diaphragm assembly and the second magnet, a third cavity is formed between the second diaphragm assembly and the third magnet, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnet.

[0066] Wherein, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity and the fourth cavity; or, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity and the fourth cavity.

[0067] The first sound outlet channel includes a sound outlet provided on the device housing, and the second sound outlet channel includes a vent provided on the device housing.

[0068] The sound-generating device of this utility model is configured with a first sound-generating unit and a second sound-generating unit, arranged back-to-back. The first sound-generating unit includes a first vibration system and a first magnetic circuit system, and the second sound-generating unit includes a second vibration system and a second magnetic circuit system. Both the first and second vibration systems vibrate along a first direction. This dual-vibration system structure allows for double-sided radiation and doubled loudness when the first and second sound-generating units radiate sound waves of the same phase, significantly improving the performance and overall loudness of the device. When they radiate sound waves of opposite phase, the two sound sources generate two equal-sized, opposite-phase sound fields. Therefore, two equal-sized, opposite-phase sound waves are received at the far-field position. Due to the dipole superposition effect, these far-field sound waves can cancel each other out to the greatest extent, greatly improving sound leakage during use, protecting user privacy, and enhancing user experience. Simultaneously, through… The first vibration system of the first sound-generating unit is configured as a first diaphragm assembly and a first voice coil connected to the first diaphragm assembly. The first magnetic circuit system of the first sound-generating unit is configured as a first magnetic part and a second magnetic part located on opposite sides of the first diaphragm assembly along a first direction, achieving a dual magnetic circuit design for the first sound-generating unit. This makes the magnetic field distribution within the vibration region of the first voice coil more uniform, providing a larger driving force that changes slowly and flatly with displacement, reducing the risk of distortion, and improving the acoustic performance of the first sound-generating unit. Similarly, the second vibration system of the second sound-generating unit is configured as a second diaphragm assembly and a second voice coil connected to the second diaphragm assembly. The second magnetic circuit system of the second sound-generating unit is configured as a third magnetic part and a fourth magnetic part located on opposite sides of the second diaphragm assembly along a first direction, achieving a dual magnetic circuit design for the second sound-generating unit. This makes the magnetic field distribution within the vibration region of the second voice coil more uniform, providing a larger driving force that changes slowly and flatly with displacement, reducing the risk of distortion, and improving the acoustic performance of the second sound-generating unit. Attached Figure Description

[0069] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0070] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model;

[0071] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model from another perspective;

[0072] Figure 3 An exploded view of an embodiment of the sound-generating device provided by this utility model;

[0073] Figure 4 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0074] Figure 5 A cross-sectional schematic diagram from another perspective of an embodiment of the sound-generating device provided by this utility model;

[0075] Figure 6 A cross-sectional schematic diagram from another perspective of an embodiment of the sound-generating device provided by this utility model;

[0076] Figure 7 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by this utility model;

[0077] Figure 8 This is a schematic diagram of the structure of an embodiment of the first diaphragm / second diaphragm provided by this utility model;

[0078] Figure 9 A schematic diagram of the connection structure between the first voice coil / second voice coil and the first diaphragm / second diaphragm according to an embodiment of the present invention;

[0079] Figure 10 A schematic diagram of the connection structure between the first voice coil / second voice coil and the first diaphragm / second diaphragm provided in another embodiment of the present invention;

[0080] Figure 11 A schematic diagram of the structure of an embodiment of the first centering support / second centering support provided by this utility model;

[0081] Figure 12 A cross-sectional schematic diagram of an embodiment of the second and third magnetic parts provided by this utility model;

[0082] Figure 13 A schematic diagram of the magnetic field distribution of an embodiment of the sound-generating device provided by this utility model;

[0083] Figure 14 A schematic diagram of the structure of an embodiment of the electronic device provided by this utility model;

[0084] Figure 15 A schematic diagram of the structure of an embodiment of the electronic device provided by this utility model from another perspective;

[0085] Figure 16 A cross-sectional schematic diagram of an embodiment of the electronic device provided by this utility model;

[0086] Figure 17 A cross-sectional schematic diagram from another perspective of an embodiment of the electronic device provided by this utility model.

[0087] Explanation of icon numbers:

[0088] 100. Sound-generating device; 101. First sound-generating unit; 1. First outer shell; 11. First clearance gap; 12. First sound outlet; 13. First clearance part; 2. First vibration system; 21. First diaphragm assembly; 211. First diaphragm; 2111. First surround; 2112. Second clearance part; 2113. First outer connecting part; 2114. First inner connecting part; 212. First diaphragm plate; 2121. First inner diaphragm plate; 2122. First outer diaphragm plate; 22. First voice coil; 221. First voice coil; 222. Second voice coil; 23. First centering support; 231. First outer fixing part; 232. First inner fixing part; 233. First spring arm part; 24. First cavity; 25. Second cavity; 3. First magnetic circuit system; 31. First magnetic part; 311. First magnetic guide plate; 3111. First welding part; 3112. Third sound outlet; 3113. First main body; 3114. First recessed edge; 312. First central magnet; 3121. First long side; 3122. First short side; 313. First side magnet; 314. First gap; 315. First dense area of ​​magnetic field lines; 32. Second magnetic part; 321. First support plate; 322. Second central magnet; 323. Second side magnet; 324. Second gap; 102. Second sound-emitting unit; 4. Second outer shell; 41. Second clearance gap; 42. Second sound outlet; 43. Third clearance part; 5. Second vibration system; 51. Second diaphragm assembly; 511. Second diaphragm; 5111. Second surround; 5112. Fourth clearance part; 5113. First outer connection part; 5114. First inner connection part; 512. Second diaphragm plate; 5121. Second inner diaphragm plate; 5122. Second outer diaphragm plate; 52. Second voice coil; 521. Third voice coil; 522. Fourth voice coil; 53. Second centering support; 531. Second outer fixing part; 532. Second inner fixing part; 533. Second spring arm part; 54. Third cavity; 55. Fourth cavity; 6. Second magnetic circuit system; 61. Third magnet; 611. Second support plate; 612. Third center magnet; 613. Third side magnet; 61 4. Third gap; 615. First magnet structure; 616. Second magnet structure; 617. Flat plate structure; 618. First through hole; 619. Second through hole; 62. Fourth magnetic part; 621. Second magnetic guide plate; 6211. Second welding part; 6212. Fourth sound outlet; 6213. Second main body part; 6214. Second recessed edge; 622. Fourth central magnet; 6221. Second long side; 6222. Second short side; 623. Fourth side magnet; 624. Fourth gap; 625. Second magnetic field line dense area; 700. Equipment housing; 710. Sound outlet; 720. Vent; 730. Mounting cavity; 740. Front cavity; 750. Rear cavity; 800. Electronic equipment.

[0089] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0090] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0091] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0092] 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.

[0093] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0094] This utility model 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, etc., and is not limited thereto.

[0095] Please refer to the reference. Figures 1 to 12As shown in this embodiment of the invention, the sound-generating device 100 includes a first sound-generating unit 101 and a second sound-generating unit 102 arranged back-to-back. The first sound-generating unit 101 includes a first vibration system 2 and a first magnetic circuit system 3. The second sound-generating unit 102 includes a second vibration system 5 and a second magnetic circuit system 6. Both the first vibration system 2 and the second vibration system 5 vibrate along a first direction. The first vibration system 2 includes a first diaphragm assembly 21 and a first voice coil 22 connected to the first diaphragm assembly 21. The first magnetic circuit system 3 includes first magnetic portions 3 located on opposite sides of the first diaphragm assembly 21 along the first direction. The first magnetic part 31 has a first magnetic gap corresponding to one end of the first voice coil 22, and the second magnetic part 32 has a second magnetic gap corresponding to the other end of the first voice coil 22. The second vibration system 5 includes a second diaphragm assembly 51 and a second voice coil 52 connected to the second diaphragm assembly 51. The second magnetic circuit system 6 includes a third magnetic part 61 and a fourth magnetic part 62 located on opposite sides of the second diaphragm assembly 51 along a first direction. The third magnetic part 61 has a third magnetic gap corresponding to one end of the second voice coil 52, and the fourth magnetic part 62 has a fourth magnetic gap corresponding to the other end of the second voice coil 52.

[0096] In this embodiment, the sound-generating device 100 can be a single sound-generating unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It should be noted that the first sound-generating unit 101 and the second sound-generating unit 102 of the sound-generating device 100 can also be separate sound-generating unit structures. By setting the first sound-generating unit 101 and the second sound-generating unit 102 to be arranged back to back, the sound-generating device 100 can integrate the two sound-generating unit structures into one, and the two sound-generating units can cooperate to form a dual-vibration system structure. When the first sound-generating unit 101 and the second sound-generating unit 102 radiate sound waves of the same phase outward, the superposition of the two-sided sound waves can be achieved, which can significantly improve the performance of the sound-generating device and increase the overall loudness.

[0097] Understandably, the first sound-emitting unit 101 and the second sound-emitting unit 102 of the sound-emitting device 100 are arranged back to back. The first sound-emitting unit 101 and the second sound-emitting unit 102 can radiate sound waves of equal size and opposite phase. According to the superposition effect of dipoles, the two sound waves with opposite phases in the far field can cancel each other out to the greatest extent, which greatly improves the sound leakage problem of the sound-emitting device 100 during use, protects the user's privacy, and improves the user experience.

[0098] In this embodiment, as Figures 1 to 7As shown, the first sound-generating unit 101 and the second sound-generating unit 102 of the sound-generating device 100 are arranged along a first direction. The first vibration system 2 and the first magnetic circuit system 3 of the first sound-generating unit 101 are arranged opposite to each other. The second vibration system 5 and the second magnetic circuit system 6 of the second sound-generating unit 102 are also arranged. Optionally, both the first vibration system 2 and the second vibration system 5 vibrate along the first direction.

[0099] Understandably, the first sound-emitting unit 101 and the second sound-emitting unit 102 are symmetrically arranged along a plane perpendicular to the first direction. This arrangement allows the first sound-emitting unit 101 and the second sound-emitting unit 102 to be designed as mirror images, ensuring that the loudness emitted from both sides is consistent. When the first sound-emitting unit 101 and the second sound-emitting unit 102 radiate sound waves of equal size and opposite phase, the dipole principle is used to effectively reduce far-field sound leakage.

[0100] In this embodiment, as Figures 3 to 7 As shown, by configuring the first vibration system 2 of the first sound-generating unit 101 as a first diaphragm assembly 21 and a first voice coil 22 connected to the first diaphragm assembly 21, and configuring the first magnetic circuit system 3 as a first magnetic part 31 and a second magnetic part 32 located on opposite sides of the first diaphragm assembly 21 along a first direction, the first magnetic part 31 has a first magnetic gap corresponding to one end of the first voice coil 22, and the second magnetic part 32 has a second magnetic gap corresponding to the other end of the first voice coil 22, the first magnetic part 31 and the second magnetic part 32 of the first magnetic circuit system 3 in the first sound-generating unit 101 respectively form magnetic fields on opposite sides of the first diaphragm assembly 21, realizing the dual magnetic circuit design of the first sound-generating unit 101, combined with Figure 13 As shown, the above configuration makes the magnetic field distribution in the vibration area of ​​the first voice coil 22 more uniform, which can provide the first voice coil 22 with a larger driving force that changes slowly and flatly with displacement, reduce the risk of distortion, and thus improve the acoustic performance of the first sound unit 101.

[0101] Meanwhile, by setting the second vibration system 5 of the second sound-generating unit 102 as a second diaphragm assembly 51 and a second voice coil 52 connected to the second diaphragm assembly 51, and setting the second magnetic circuit system 6 as a third magnetic part 61 and a fourth magnetic part 62 located on opposite sides of the second diaphragm assembly 51 along the first direction, the third magnetic part 61 has a third magnetic gap corresponding to one end of the second voice coil 52, and the fourth magnetic part 62 has a fourth magnetic gap corresponding to the other end of the second voice coil 52, so that the third magnetic part 61 and the fourth magnetic part 62 of the second magnetic circuit system 6 in the second sound-generating unit 102 respectively form magnetic fields on opposite sides of the second diaphragm assembly 51, realizing the dual magnetic circuit design of the second sound-generating unit 102, combined with Figure 13As shown, the above configuration makes the magnetic field distribution in the vibration area of ​​the second voice coil 52 more uniform, which can provide the second voice coil 52 with a larger driving force that changes slowly and flatly with displacement, reduce the risk of distortion, and thus improve the acoustic performance of the second sound unit 102.

[0102] Understandably, the first sound-generating unit 101 and the second sound-generating unit 102 of the sound-generating device 100 can be installed and fixed as a whole through a housing or casing. Optionally, the housing or casing can be a one-piece molded structure or a separate structure. When the housing or casing is a one-piece structure, the first vibration system 2 and the first magnetic circuit system 3 of the first sound-generating unit 101 and the second vibration system 5 and the second magnetic circuit system 6 of the second sound-generating unit 102 are all fixed to the housing or casing. When the housing or casing is a separate structure, for example, the housing or casing includes a first housing 1 and a second housing 4, the first vibration system 2 and the first magnetic circuit system 3 of the first sound-generating unit 101 are fixed to the first housing 1, and the second vibration system 5 and the second magnetic circuit system 6 of the second sound-generating unit 102 are fixed to the second housing 4. The first sound-generating unit 101 and the second sound-generating unit 102 can be connected as a whole through the first housing 1 and the second housing 4 or through the first magnetic circuit system 3 and the second magnetic circuit system 6, which is not limited here.

[0103] Optionally, the outer contour of the sound-generating device 100 can be circular or square, so that the outer contours of the first sound-generating unit 101 and the second sound-generating unit 102 are set to be circular or square respectively. The specific design depends on actual needs and is not limited here.

[0104] The sound-generating device 100 of this invention comprises a first sound-generating unit 101 and a second sound-generating unit 102, arranged back-to-back. The first sound-generating unit 101 includes a first vibration system 2 and a first magnetic circuit system 3, and the second sound-generating unit 102 includes a second vibration system 5 and a second magnetic circuit system 6. Both the first vibration system 2 and the second vibration system 5 vibrate along a first direction. This dual-vibration system structure allows the sound-generating device 100 to radiate sound waves of the same phase from both the first sound-generating unit 101 and the second sound-generating unit 102. When the first sound-emitting unit 101 and the second sound-emitting unit 102 radiate sound waves of opposite phase, they generate two equally sized and oppositely phased sound fields. Therefore, two equally sized and oppositely phased sound waves are received at the far-field position. According to the dipole superposition effect, the sound waves at this far-field position can cancel each other out to the greatest extent, greatly improving the sound leakage problem of the sound-emitting unit 100 during use, protecting user privacy, and improving user experience. Simultaneously, by using the first sound-emitting unit... The first vibration system 2 of the first sound-generating unit 101 is configured as a first diaphragm assembly 21 and a first voice coil 22 connected to the first diaphragm assembly 21. The first magnetic circuit system 3 of the first sound-generating unit 101 is configured as a first magnetic part 31 and a second magnetic part 32 located on opposite sides of the first diaphragm assembly 21 along a first direction. This achieves a dual magnetic circuit design for the first sound-generating unit 101, making the magnetic field distribution within the vibration region of the first voice coil 22 more uniform. This provides the first voice coil 22 with a larger driving force that changes slowly and flatly with displacement, reducing the risk of distortion and improving the acoustic performance of the first sound-generating unit 101. The second... The second vibration system 5 of the sound-generating unit 102 is configured as a second diaphragm assembly 51 and a second voice coil 52 connected to the second diaphragm assembly 51. The second magnetic circuit system 6 of the second sound-generating unit 102 is configured as a third magnetic part 61 and a fourth magnetic part 62 located on opposite sides of the second diaphragm assembly 51 along the first direction. This realizes the dual magnetic circuit design of the second sound-generating unit 102, which makes the magnetic field distribution in the vibration area of ​​the second voice coil 52 more uniform. This can provide the second voice coil 52 with a larger driving force that changes slowly and flatly with displacement, reduce the risk of distortion, and improve the acoustic performance of the second sound-generating unit 102.

[0105] In one embodiment, the first voice coil 22 includes a first sub-voice coil 221 and a second sub-voice coil 222 disposed on opposite sides of the first diaphragm assembly 21. The first sub-voice coil 221 is disposed corresponding to the first magnetic gap, and the second sub-voice coil 222 is disposed corresponding to the second magnetic gap.

[0106] In this embodiment, as Figure 10As shown, the first voice coil 221 and the second voice coil 222 are each wound with independent wires. The first diaphragm assembly 21 may include a first diaphragm 211 and a first diaphragm plate 212 connected to the inner side of the first diaphragm 211. The first voice coil 221 and the second voice coil 222 are respectively disposed on opposite sides of the first diaphragm plate 212. By setting the first voice coil 22 as a split structure, the first diaphragm plate 212 can be formed as an integral structure and connected to the first voice coil 221 and the second voice coil 222 respectively. This makes the structural design of the first diaphragm plate 212 simpler and the assembly simpler.

[0107] Of course, in other embodiments, such as Figures 3 to 7 , Figure 9 As shown, the first voice coil 22 can also be configured as a one-piece molded structure, that is, the first voice coil 22 is a one-piece wound structure and extends along the first direction, so that the two ends of the first voice coil 22 are respectively set to correspond to the first magnetic gap and the second magnetic gap, thereby simplifying the structural design of the sound generating device 100 and improving assembly efficiency. It is understood that the first voice coil 22 is set through the first diaphragm assembly 21, which is not limited here.

[0108] In one embodiment, the first voice coil 22 is an integrally wound structure and extends along a first direction. The first voice coil 22 has a height along the first direction and a thickness along a third direction. The first direction is perpendicular to the third direction. The height of the first voice coil 22 is greater than the thickness of the first voice coil 22. The first magnetic gap includes a first gap 314 located between the first center magnet 312 and the first side magnet 313 in the third direction. The second magnetic gap includes a second gap 324 located between the second center magnet 322 and the second side magnet 323 in the third direction. The thickness of the first voice coil 22 is less than the width of the first gap 314 and the second gap 324.

[0109] It should be noted that, as Figures 1 to 7 As shown, the direction of vibration of the first diaphragm assembly 21 is defined as the first direction, and the first direction is defined as the Z-axis direction. The length direction of the first shell 1 is defined as the second direction, and the second direction is defined as the Y-axis direction. The width direction of the first shell 1 is defined as the third direction, and the third direction is defined as the X-axis direction. That is, the first direction, the second direction, and the third direction are all perpendicular to each other.

[0110] In this embodiment, as Figures 3 to 7 , Figure 9 , Figure 13 As shown, the first voice coil 22 is an integral voice coil extending along a first direction, formed by winding the same wire. The first voice coil 22 has a height along the first direction and a thickness along a third direction. Optionally, the height of the first voice coil 22 is greater than the thickness of the first voice coil 22. It should be noted that the thickness of the first voice coil 22 is the distance between the inner and outer wall surfaces of the annular voice coil.

[0111] Understandably, since the height of the first voice coil 22 is greater than its thickness, it is less affected by changes in the magnetic field during vibration, especially when the vibration amplitude is large. This results in a significantly flatter BL(x) curve, significantly reducing distortion in the sound-generating device 100 and improving sound quality. Optionally, the first voice coil 22 in this embodiment is suitable for full-range loudspeakers, operating in the frequency range of 20Hz to 20kHz. Specifically, the ratio of the height to the thickness of the first voice coil 22 can range from 1.1:1 to 10:1, with specific ratios including 1.1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, and 10:1, which the user can select according to their actual needs.

[0112] In this embodiment, the two ends of the first voice coil 22 are respectively opposite to the first gap 314 and the second gap 324, and the thickness of the first voice coil 22 is less than the width of the first gap 314 and the second gap 324. During vibration, the two ends of the first voice coil 22 extend into the first gap 314 and the second gap 324 respectively. The first gap 314 and the second gap 324 respectively provide a buffer for the ends of their respective first voice coils 22. This can ensure the vibration amplitude of the first voice coil 22 when the thickness of the sound-generating device 100 is constant, or reduce the thickness of the sound-generating device 100 when the vibration amplitude of the first voice coil 22 is constant, facilitating a thinner design.

[0113] In one embodiment, the second voice coil 52 includes a third sub-voice coil 521 and a fourth sub-voice coil 522 disposed on opposite sides of the second diaphragm assembly 51. The third sub-voice coil 521 is disposed corresponding to the third magnetic gap, and the fourth sub-voice coil 522 is disposed corresponding to the fourth magnetic gap.

[0114] In this embodiment, as Figure 10 As shown, the third voice coil 521 and the fourth voice coil 522 are each wound with independent wires. The second diaphragm assembly 51 may include a second diaphragm 511 and a second diaphragm plate 512 connected to the inner side of the second diaphragm 511. The third voice coil 521 and the fourth voice coil 522 are respectively located on opposite sides of the second diaphragm plate 512. By setting the second voice coil 52 as a split structure, the second diaphragm plate 512 can be formed as an integral structure and connected to the third voice coil 521 and the fourth voice coil 522 respectively. This makes the structural design of the second diaphragm plate 512 simpler and the assembly simpler.

[0115] Of course, in other embodiments, such as Figures 3 to 7 , Figure 9As shown, the second voice coil 52 can also be configured as a one-piece molded structure, that is, the second voice coil 52 is a one-piece wound structure and extends along the first direction, so that the two ends of the second voice coil 52 are respectively set with the third magnetic gap and the fourth magnetic gap, thereby simplifying the structural design of the sound generating device 100 and improving assembly efficiency. It is understood that the second voice coil 52 is set through the second diaphragm assembly 51, which is not limited here.

[0116] In one embodiment, the second voice coil 52 is an integrally wound structure and extends along a first direction. The second voice coil 52 has a height along the first direction and a thickness along a third direction. The first direction is perpendicular to the third direction. The height of the second voice coil 52 is greater than the thickness of the second voice coil 52. The third magnetic gap includes a third gap 614 located between the third center magnet 612 and the third side magnet 613 in the third direction. The fourth magnetic gap includes a fourth gap 624 located between the fourth center magnet 622 and the fourth side magnet 623 in the third direction. The thickness of the second voice coil 52 is less than the width of the third gap 614 and the fourth gap 624.

[0117] In this embodiment, as Figures 3 to 7 , Figure 9 , Figure 13 As shown, the second voice coil 52 is an integral voice coil extending along a first direction, formed by winding the same wire. The second voice coil 52 has a height along the first direction and a thickness along a third direction. Optionally, the height of the second voice coil 52 is greater than its thickness. It should be noted that the thickness of the second voice coil 52 is the distance between the inner and outer walls of the annular voice coil.

[0118] Understandably, since the height of the second voice coil 52 is greater than its thickness, it is less affected by changes in the magnetic field during vibration, especially when the vibration amplitude is large. This results in a significantly flatter BL(x) curve, significantly reducing distortion in the sound-generating device 100 and improving sound quality. Optionally, the second voice coil 52 in this embodiment is suitable for full-range loudspeakers, operating in the frequency range of 20Hz to 20kHz. Specifically, the ratio of the height to the thickness of the second voice coil 52 can range from 1.1:1 to 10:1, with specific ratios including 1.1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, and 10:1, which the user can select according to their actual needs.

[0119] In this embodiment, the two ends of the second voice coil 52 are respectively opposite to the third gap 614 and the fourth gap 624, and the thickness of the second voice coil 52 is less than the width of the third gap 614 and the fourth gap 624. During vibration, the two ends of the second voice coil 52 extend into the third gap 614 and the fourth gap 624 respectively. The third gap 614 and the fourth gap 624 respectively provide a buffer for the ends of their respective second voice coils 52. This can ensure the vibration amplitude of the second voice coil 52 when the thickness of the sound-generating device 100 is constant, or reduce the thickness of the sound-generating device 100 when the vibration amplitude of the second voice coil 52 is constant, which is conducive to thinner design.

[0120] In one embodiment, the first diaphragm assembly 21 includes a first diaphragm 211 and a first diaphragm plate 212 connected to the inner side of the first diaphragm 211, and a first voice coil 22 connected to the first diaphragm plate 212. Optionally, the inner side of the first diaphragm 211 is bonded to the outer periphery of the first diaphragm plate 212.

[0121] In this embodiment, as Figures 3 to 8 As shown, the first diaphragm 211 includes a first folded ring 2111, a first outer connecting portion 2113 disposed on the outer side of the first folded ring 2111, and a first inner connecting portion 2114 disposed on the inner side of the first folded ring 2111. The first outer connecting portion 2113 of the first diaphragm 211 can be connected to a structure such as a shell or housing, and the first inner connecting portion 2114 of the first diaphragm 211 is connected to the first vibrating plate 212. It should be noted that the first folded ring 2111 of the first diaphragm 211 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0122] Understandable, such as Figure 10 As shown, the first diaphragm assembly 21's first vibrating plate 212 can be an integrally formed structure. In this case, the first voice coil 22 can be a separate structure, that is, the first sub-voice coil 221 and the second sub-voice coil 222 of the first voice coil 22 are respectively located on opposite sides of the first diaphragm assembly 212. This arrangement can ensure both the structural strength of the first diaphragm assembly 212 and the connection stability of the first sub-voice coil 221 and the second sub-voice coil 222 with the first diaphragm assembly 212.

[0123] Of course, in other embodiments, such as Figures 3 to 7 , Figure 9 As shown, the first diaphragm 212 includes a first inner diaphragm 2121 connected to the inner wall of the first voice coil 22 and a first outer diaphragm 2122 connected to the outer wall of the first voice coil 22. The first outer diaphragm 2122 is connected to the first diaphragm 211.

[0124] In this embodiment, by setting the first diaphragm 212 as a split structure, the first voice coil 22 can be selected as an integrally formed structure. This simplifies the electrical connection structure of the first voice coil 22. The first voice coil 22 has a lead wire on one side, and the electrical connector is only set on one side of the first voice coil 22.

[0125] In one embodiment, the second diaphragm assembly 51 includes a second diaphragm 511 and a second diaphragm plate 512 connected to the inner side of the second diaphragm 511, and a second voice coil 52 connected to the second diaphragm plate 512. Optionally, the inner side of the second diaphragm 511 is bonded to the outer periphery of the second diaphragm plate 512.

[0126] In this embodiment, as Figures 3 to 8 As shown, the second diaphragm 511 includes a second folded ring 5111, a second outer connecting portion 5113 disposed on the outer side of the second folded ring 5111, and a second inner connecting portion 5114 disposed on the inner side of the second folded ring 5111. The second outer connecting portion 5113 of the second diaphragm 511 can be connected to a structure such as a shell or housing, and the second inner connecting portion 5114 of the second diaphragm 511 is connected to the second vibrating plate 512. It should be noted that the second folded ring 5111 of the second diaphragm 511 can be an upwardly convex bulge structure or a downwardly concave bulge structure.

[0127] Understandable, such as Figure 10 As shown, the second diaphragm assembly 51's second diaphragm plate 512 can be an integrally molded structure. In this case, the second voice coil 52 can be a separate structure, that is, the third voice coil 521 and the fourth voice coil 522 of the second voice coil 52 are respectively located on opposite sides of the second diaphragm plate 512. This arrangement can ensure both the structural strength of the second diaphragm plate 512 and the connection stability of the third voice coil 521 and the fourth voice coil 522 with the second diaphragm plate 512.

[0128] Of course, in other embodiments, such as Figures 3 to 7 , Figure 9 As shown, the second diaphragm 512 includes a second inner diaphragm 5121 connected to the inner wall of the second voice coil 52 and a second outer diaphragm 5122 connected to the outer wall of the second voice coil 52. The second outer diaphragm 5122 is connected to the second diaphragm 511.

[0129] In this embodiment, by setting the second diaphragm 512 as a split structure, the second voice coil 52 can be selected as an integrally formed structure. This simplifies the electrical connection structure with the second voice coil 52. The second voice coil 52 has a lead wire on one side, and the electrical connector is only provided on one side of the second voice coil 52.

[0130] In one embodiment, the first magnetic part 31 includes a first magnetic plate 311 and a first central magnet 312 and a first side magnet 313 disposed on the first magnetic plate 311. The first side magnet 313 is located outside the first central magnet 312 and is spaced apart from the first central magnet 312 to form a first magnetic gap. The second magnetic part 32 includes a first support plate 321 and a second central magnet 322 and a second side magnet 323 disposed on the first support plate 321. The second side magnet 323 is located outside the second central magnet 322 and is spaced apart from the second central magnet 322 to form a second magnetic gap. The third magnetic part 61 is connected to the side of the first support plate 321 facing away from the first diaphragm assembly 21. The sides of the first central magnet 312 and the first side magnet 313 facing the first diaphragm assembly 21 are both exposed in the internal cavity of the first sound-generating unit 101. The sides of the second central magnet 322 and the second side magnet 323 facing the first diaphragm assembly 21 are also exposed in the internal cavity of the first sound-generating unit 101.

[0131] In this embodiment, as Figures 3 to 7 , Figure 13 As shown, by configuring the first magnetic part 31 as a first magnetic guide plate 311 and a first central magnet 312 and a first side magnet 313 disposed on the first magnetic guide plate 311, the sides of the first central magnet 312 and the first side magnet 313 facing the first diaphragm assembly 21 are both exposed in the internal cavity of the first sound-generating unit 101. And by configuring the second magnetic part 32 as a first support plate 321 and a second central magnet 322 and a second side magnet 323 disposed on the first support plate 321, the sides of the second central magnet 322 and the second side magnet 323 facing the first diaphragm assembly 21 are both exposed in the internal cavity of the first sound-generating unit 101. In this way, the central washer and side washer structures of the first magnetic part 31 and the second magnetic part 32 are eliminated, thereby reducing the thickness of the first sound-generating unit 101 in the Z direction and increasing the volume of the magnets in the first magnetic part 31 and the second magnetic part 32, thus improving the BL value. Furthermore, the first magnetic part 31 and the second magnetic part 32 form a magnetic field region that is longer in the first direction and has a more uniform magnetic field distribution, which makes the magnetic field lines passing through the first voice coil 22 more numerous and denser, and the driving force is greater. This provides the first voice coil 22 with a larger and flat driving force that changes slowly with displacement, resulting in a flatter BL(x) curve and reduced distortion risk.

[0132] Optionally, the first central magnet 312 and the first side magnet 313 are both magnetized along the first direction, but in opposite directions; the second central magnet 322 and the second side magnet 323 are both magnetized along the first direction, but in opposite directions; the magnetization directions of the first central magnet 312 and the second central magnet 322 are opposite, and the magnetization directions of the first side magnet 313 and the second side magnet 323 are opposite. The first magnetic gap and the second magnetic gap include a first magnetic field line density region 315 located between the first magnetic part 31 and the second magnetic part 32 along the first direction, accommodating the first voice coil 22, such as... Figure 13 As shown.

[0133] Understandably, this allows the first central magnet 312 and the second central magnet 322 to form a magnetic pair structure, and the first side magnet 313 and the second side magnet 323 to form a magnetic pair structure. Furthermore, the first central magnet 312 and the first side magnet 313 form a magnetic circuit, and the second central magnet 322 and the second side magnet 323 form a magnetic circuit. As a result, a magnetic field region (i.e., the first magnetic field line dense region 315) that is relatively long in the first direction and has a relatively uniform magnetic field distribution is formed between the first magnetic part 31 and the second magnetic part 32. This makes the magnetic field lines more dense and uniform, and the first voice coil 22 can be in the dense magnetic field line region when it reciprocates along the first direction. This makes the BLx curve flatter, thereby reducing distortion.

[0134] To ensure consistent loudness on opposite sides of the first diaphragm assembly 21, the first magnetic portion 31 and the second magnetic portion 32 of the first sound-generating unit 101 may optionally be symmetrically arranged with respect to the first diaphragm assembly 21. In this embodiment, the first central magnet 312 and the second central magnet 322 may optionally be symmetrically arranged with respect to the first diaphragm assembly 21. The first side magnet 313 and the second side magnet 323 may optionally be symmetrically arranged with respect to the first diaphragm assembly 21. This arrangement ensures that the driving force at both ends of the first voice coil 22 is the same.

[0135] In this embodiment, the first side magnet 313 of the first magnetic part 31 is located outside the first central magnet 312 and is spaced apart from the first central magnet 312 to form a first magnetic gap. It is understood that the first side magnet 313 of the first magnetic part 31 may be an integrally formed annular structure, in which case the first central magnet 312 is located in the center of the annular structure's first side magnet 313, and the first side magnet 313 and the first central magnet 312 are spaced apart to form the first magnetic gap. Optionally, the first magnetic gap may be annular or racetrack-shaped, etc., and is not limited here.

[0136] Of course, in other embodiments, there may be multiple first side magnets 313, which are arranged around the outside of the first central magnet 312. In this case, the multiple first side magnets 313 may be arranged end to end to form a closed ring structure, that is, adjacent first side magnets 313 may be spliced, butt-joined or abutted against each other; or, adjacent first side magnets 313 may be arranged at intervals, that is, the multiple first side magnets 313 may be arranged at intervals and around the first central magnet 312, which is not limited here.

[0137] In one embodiment, such as Figure 3 , Figures 5 to 7 As shown, the first central magnet 312 includes two first long sides 3121 and two first short sides 3122 connected end to end. The first side magnets 313 include two, which are symmetrically arranged on opposite sides of the first central magnet 312 and are respectively opposite to and spaced from the two first long sides 3121. The two first side magnets 313 extend along the extension direction of the first long sides 3121.

[0138] Of course, in other embodiments, the first side magnet 313 includes four, with two first side magnets 313 facing and spaced apart from the two first long sides 3121, and the other two first side magnets 313 facing and spaced apart from the two first short sides 3122, which is not limited here.

[0139] In this embodiment, the second side magnet 323 of the second magnetic part 32 is located outside the second central magnet 322 and is spaced apart from the second central magnet 322 to form a second magnetic gap. It is understood that the second side magnet 323 of the second magnetic part 32 can be an integrally formed annular structure, in which case the second central magnet 322 is located in the center of the annular structure's second side magnet 323, and the second side magnet 323 is spaced apart from the second central magnet 322 to form the second magnetic gap. Optionally, the second magnetic gap can be annular or racetrack-shaped, etc., and is not limited here.

[0140] Of course, in other embodiments, there are multiple second side magnets 323, which are arranged around the outside of the second central magnet 322. In this case, the multiple second side magnets 323 can be configured to form a closed ring structure with their ends connected, that is, adjacent second side magnets 323 are spliced, butt-joined or abutted against each other; or, adjacent second side magnets 323 are spaced apart, that is, the multiple second side magnets 323 are spaced apart and arranged around the second central magnet 322, which is not limited here.

[0141] In one embodiment, such as Figure 3 , Figures 5 to 7As shown, the second central magnet 322 includes two long sides and two short sides connected end to end. There are two second side magnets 323. The two second side magnets 323 are symmetrically arranged on opposite sides of the second central magnet 322, and are respectively opposite to and spaced apart from the two long sides. The two second side magnets 323 extend along the extension direction of the long sides.

[0142] Of course, in other embodiments, the second side magnet 323 includes four, with two second side magnets 323 facing and spaced apart from the two long sides, and the other two second side magnets 323 facing and spaced apart from the two short sides, which is not limited here.

[0143] In one embodiment, the third magnetic part 61 includes a second support plate 611 and a third central magnet 612 and a third side magnet 613 disposed on the second support plate 611. The third side magnet 613 is located outside the third central magnet 612 and is spaced apart from the third central magnet 612 to form a third magnetic gap. The side of the second support plate 611 facing away from the second diaphragm assembly 51 is connected to the side of the first support plate 321 facing away from the first diaphragm assembly 21. The fourth magnetic part 62 includes a second magnetic guide plate 621 and a third magnetic guide plate 623 disposed on the second magnetic guide plate 621. The fourth central magnet 622 and the fourth lateral magnet 623 of 621 are located outside the fourth central magnet 622 and are spaced apart from the fourth central magnet 622 to form a fourth magnetic gap; wherein, the sides of the third central magnet 612 and the third lateral magnet 613 facing the second diaphragm assembly 51 are both exposed in the internal cavity of the second sound-generating unit 102; the sides of the fourth central magnet 622 and the fourth lateral magnet 623 facing the second diaphragm assembly 51 are both exposed in the internal cavity of the second sound-generating unit 102.

[0144] In this embodiment, as Figures 3 to 7 , Figure 13As shown, by setting the third magnetic part 61 as the second support plate 611 and the third central magnet 612 and the third side magnet 613 provided on the second support plate 611, the sides of the third central magnet 612 and the third side magnet 613 facing the second diaphragm assembly 51 are both exposed in the internal cavity of the second sound-generating unit 102. And by setting the fourth magnetic part 62 as the second magnetic guide plate 621 and the fourth central magnet 622 and the fourth side magnet 623 provided on the second magnetic guide plate 621, the sides of the fourth central magnet 622 and the fourth side magnet 623 facing the second diaphragm assembly 51 are both exposed in the internal cavity of the second sound-generating unit 102. In this way, the central washer and side washer structures of the third magnetic part 61 and the fourth magnetic part 62 are eliminated, thereby reducing the thickness of the second sound-generating unit 102 in the Z direction and increasing the volume of the magnets in the third magnetic part 61 and the fourth magnetic part 62, thus improving the BL value. Furthermore, the third magnetic section 61 and the fourth magnetic section 62 form a magnetic field region that is longer in the first direction and has a more uniform magnetic field distribution. This results in more and denser magnetic field lines passing through the second voice coil 52, and a greater driving force. This provides the second voice coil 52 with a larger and flat driving force that changes slowly with displacement, resulting in a flatter BL(x) curve and reduced risk of distortion.

[0145] Optionally, the third central magnet 612 and the third lateral magnet 613 are both magnetized along the first direction, but in opposite directions; the fourth central magnet 622 and the fourth lateral magnet 623 are both magnetized along the first direction, but in opposite directions; the magnetization directions of the third central magnet 612 and the fourth central magnet 622 are opposite, and the magnetization directions of the third lateral magnet 613 and the fourth lateral magnet 623 are opposite. The third magnetic gap and the fourth magnetic gap include a second magnetic field line density region 625 located between the third magnetic part 61 and the fourth magnetic part 62 along the first direction, accommodating the second voice coil 52. Figure 13 As shown.

[0146] Understandably, this allows the third central magnet 612 and the fourth central magnet 622 to form a magnetic pair structure, and the third side magnet 613 and the fourth side magnet 623 to form a magnetic pair structure. Furthermore, the third central magnet 612 and the third side magnet 613 form a magnetic circuit, and the fourth central magnet 622 and the fourth side magnet 623 form a magnetic circuit. This creates a magnetic field region (i.e., the second magnetic field line dense region 625) that is relatively long in the first direction and has a relatively uniform magnetic field distribution between the third magnetic part 61 and the fourth magnetic part 62. This makes the magnetic field lines more dense and uniform, and the second voice coil 52 can be in the dense magnetic field line region when it reciprocates along the first direction. This makes the BLx curve flatter, thereby reducing distortion.

[0147] To ensure consistent loudness on both sides of the second diaphragm assembly 51, the third magnet 61 and the fourth magnet 62 of the first sound-generating unit 101 may optionally be symmetrically arranged with respect to the second diaphragm assembly 51. In this embodiment, the third center magnet 612 and the fourth center magnet 622 may optionally be symmetrically arranged with respect to the second diaphragm assembly 51. The third side magnet 613 and the fourth side magnet 623 may optionally be symmetrically arranged with respect to the second diaphragm assembly 51. This arrangement ensures that the driving force at both ends of the second voice coil 52 is the same.

[0148] In this embodiment, the second magnetic part 32 of the first sound-generating unit 101 is connected back to back to the third magnetic part 61 of the second sound-generating unit 102. That is, the side of the first support plate 321 of the second magnetic part 32 facing away from the first diaphragm assembly 21 is connected to the side of the second support plate 611 of the third magnetic part 61 facing away from the second diaphragm assembly 51.

[0149] It is understandable that the first support plate 321 and the second support plate 611 can be either integrally formed or separate structures. When the first support plate 321 and the second support plate 611 are integrally formed, such as... Figures 3 to 6 As shown, the first support plate 321 and the second support plate 611 form an integrally molded flat plate structure 617, which simplifies the structure of the sound-generating device 100 and improves assembly efficiency. Optionally, the flat plate structure 617 is made of a magnetically conductive material; or, the flat plate structure 617 is made of a non-magnetically conductive material. When the first support plate 321 and the second support plate 611 are separate structures, the first support plate 321 and the second support plate 611 are bonded or welded together. Optionally, the first support plate 321 and / or the second support plate 611 are made of a magnetically conductive material; or, the first support plate 321 and / or the second support plate 611 are made of a non-magnetically conductive material.

[0150] To ensure that the first magnetic part 31 of the first sound-generating unit 101 forms a magnetic circuit, the first magnetic guide plate 311 of the first magnetic part 31 may optionally be made of a magnetically conductive material. To ensure that the fourth magnetic part 62 of the second sound-generating unit 102 forms a magnetic circuit, the second magnetic guide plate 621 of the fourth magnetic part 62 may optionally be made of a magnetically conductive material.

[0151] In this embodiment, the third lateral magnet 613 of the third magnetic part 61 is located outside the third central magnet 612 and is spaced apart from the third central magnet 612 to form a third magnetic gap. It is understood that the third lateral magnet 613 of the third magnetic part 61 may be an integrally formed annular structure, in which case the third central magnet 612 is located in the center of the annular structure's third lateral magnet 613, and the third lateral magnet 613 and the third central magnet 612 are spaced apart to form a third magnetic gap. Optionally, the third magnetic gap may be annular or racetrack-shaped, etc., and is not limited here.

[0152] Of course, in other embodiments, there are multiple third-side magnets 613, which are arranged around the outside of the third central magnet 612. In this case, the multiple third-side magnets 613 can be configured to form a closed ring structure with their ends connected, that is, adjacent third-side magnets 613 are spliced, butt-joined or abutted against each other; or, adjacent third-side magnets 613 are spaced apart, that is, the multiple third-side magnets 613 are spaced apart and arranged around the third central magnet 612, which is not limited here.

[0153] In one embodiment, such as Figure 3 , Figures 5 to 7 As shown, the third central magnet 612 includes two long sides and two short sides connected end to end. The third side magnet 613 includes two magnets. The two third side magnets 613 are symmetrically arranged on opposite sides of the third central magnet 612, and are respectively opposite to and spaced apart from the two long sides. The two third side magnets 613 extend along the extension direction of the long sides.

[0154] Of course, in other embodiments, the third side magnet 613 includes four, with two third side magnets 613 facing and spaced apart from the two long sides, and the other two third side magnets 613 facing and spaced apart from the two short sides, which is not limited here.

[0155] In this embodiment, the fourth lateral magnet 623 of the fourth magnetic part 62 is located outside the fourth central magnet 622 and is spaced apart from the fourth central magnet 622 to form a fourth magnetic gap. It is understood that the fourth lateral magnet 623 of the fourth magnetic part 62 can be an integrally formed annular structure, in which case the fourth central magnet 622 is located in the center of the annular structure's fourth lateral magnet 623, and the fourth lateral magnet 623 and the fourth central magnet 622 are spaced apart to form a fourth magnetic gap. Optionally, the fourth magnetic gap can be annular or racetrack-shaped, etc., and is not limited here.

[0156] Of course, in other embodiments, there are multiple fourth side magnets 623, which are arranged around the outside of the fourth central magnet 622. In this case, the multiple fourth side magnets 623 can be arranged end to end to form a closed ring structure, that is, adjacent fourth side magnets 623 are spliced, butt-joined or abutted with each other; or, adjacent fourth side magnets 623 are arranged at intervals, that is, the multiple fourth side magnets 623 are arranged at intervals and around the fourth central magnet 622, which is not limited here.

[0157] In one embodiment, such as Figure 3 , Figures 5 to 7As shown, the fourth central magnet 622 includes two second long sides 6221 and two second short sides 6222 connected end to end. The fourth side magnet 623 includes two magnets. The two fourth side magnets 623 are symmetrically arranged on opposite sides of the fourth central magnet 622, and are respectively opposite to and spaced from the two second long sides 6221. The two fourth side magnets 623 extend along the extension direction of the second long sides 6221.

[0158] Of course, in other embodiments, the fourth side magnet 623 includes four, with two fourth side magnets 623 facing and spaced apart from the two second long sides 6221, and the other two fourth side magnets 623 facing and spaced apart from the two second short sides 6222, which is not limited here.

[0159] In one implementation, such as Figures 3 to 6 As shown, the first support plate 321 and the second support plate 611 are integrally formed flat plate structures 617. Optionally, the second central magnet 322 and the third central magnet 612 are symmetrically arranged with respect to the flat plate structure 617, and the second side magnet 323 and the third side magnet 613 are symmetrically arranged with respect to the flat plate structure 617. It can be understood that this arrangement makes the second magnetic part 32 of the first sound-emitting unit 101 and the third magnetic part 61 of the second sound-emitting unit 102 mirror images of the flat plate structure 617, which can further ensure that the loudness emitted by the first sound-emitting unit 101 and the second sound-emitting unit 102 is consistent.

[0160] Optionally, the first diaphragm assembly 21 and the second diaphragm assembly 51 are symmetrically arranged with respect to the planar structure 617. This arrangement makes the first diaphragm assembly 21 of the first sound-emitting unit 101 and the second diaphragm assembly 51 of the second sound-emitting unit 102 mirror images of each other with respect to the planar structure 617, which further ensures that the loudness emitted by the first sound-emitting unit 101 and the second sound-emitting unit 102 is consistent.

[0161] To further enhance the magnetic field strength of the first sound-generating unit 101 and the second sound-generating unit 102, in this embodiment, both the second magnetic part 32 and the third magnetic part 61 are magnetized along a first direction and in the same direction. The second magnetic part 32 and the third magnetic part 61 together form a single magnetic circuit capable of simultaneously driving the first voice coil 22 and the second voice coil 52. Understandably, this arrangement allows the second magnetic part 32 of the first sound-generating unit 101 to strengthen the magnetic field of the third magnetic part 61 of the second sound-generating unit 102, increasing the product BL value of the second sound-generating unit 102, thereby increasing the driving force of the magnetic circuit system on the second voice coil 52 and improving the sound sensitivity of the second sound-generating unit 102. Simultaneously, the third magnetic part 61 of the second sound-generating unit 102 can strengthen the magnetic field of the second magnetic part 32 of the first sound-generating unit 101, increasing the product BL value of the first sound-generating unit 101, thereby increasing the driving force of the magnetic circuit system on the first voice coil 22 and improving the sound sensitivity of the first sound-generating unit 101.

[0162] In one implementation, such as Figure 5 As shown, the second central magnet 322 and the third central magnet 612 are both magnetized along the first direction, and the magnetization directions are the same; the second side magnet 323 and the third side magnet 613 are both magnetized along the first direction, and the magnetization directions are the same; the magnetization directions of the second central magnet 322 and the third central magnet 612 are opposite to the magnetization directions of the second side magnet 323 and the third side magnet 613, so that the second magnetic part 32 and the third magnetic part 61 together form a single magnetic circuit that can simultaneously drive the first voice coil 22 and the second voice coil 52.

[0163] Optionally, the first central magnet 312 and the fourth central magnet 622 are both magnetized along the first direction and the magnetization directions are the same; the first side magnet 313 and the fourth side magnet 623 are both magnetized along the first direction and the magnetization directions are the same; the magnetization directions of the first central magnet 312 and the fourth central magnet 622 are opposite to the magnetization directions of the first side magnet 313 and the fourth side magnet 623.

[0164] In this embodiment, the magnetization directions of the first central magnet 312 and the fourth central magnet 622 are opposite to those of the second central magnet 322 and the third central magnet 612, and the magnetization directions of the first side magnet 313 and the fourth side magnet 623 are opposite to those of the second side magnet 323 and the third side magnet 613. The first magnetic gap and the second magnetic gap include a first magnetic field line dense region 315 located between the first magnetic part 31 and the second magnetic part 32 along the first direction, accommodating the first voice coil 22. The third magnetic gap and the fourth magnetic gap include a second magnetic field line dense region 625 located between the third magnetic part 61 and the fourth magnetic part 62 along the first direction, accommodating the second voice coil 52. Figure 13 As shown.

[0165] It should be noted that the first magnetic part 31 and the second magnetic part 32 form a relatively long magnetic field region (i.e., the first dense magnetic field line region 315) in the first direction, resulting in more and denser magnetic field lines passing through the first voice coil 22, thus increasing the driving force. This provides the first voice coil 22 with a larger and flatter driving force that changes slowly with displacement, resulting in a flatter BL(x) curve and reducing the risk of distortion. Furthermore, the third magnetic part 61 can strengthen the magnetic field of the second magnetic part 32, increasing the BL value of the first sound-producing unit 101, thereby increasing the driving force of the magnetic circuit system on the first voice coil 22 and improving the sound sensitivity of the first sound-producing unit 101.

[0166] Simultaneously, a relatively long and uniformly distributed magnetic field region (i.e., the second dense magnetic field line region 625) is formed between the third magnetic section 61 and the fourth magnetic section 62 in the first direction. This results in more and denser magnetic field lines passing through the second voice coil 52, leading to a greater driving force. This provides the second voice coil 52 with a larger and flatter driving force that changes slowly with displacement, resulting in a flatter BL(x) curve and reduced distortion risk. Furthermore, the second magnetic section 32 strengthens the magnetic field of the third magnetic section 61, increasing the BL value of the second sound-producing unit 102, thereby increasing the driving force of the magnetic circuit system on the second voice coil 52 and improving the sound sensitivity of the second sound-producing unit 102.

[0167] Understandably, the second magnetic part 32 of the first sound-emitting unit 101 and the third magnetic part 61 of the second sound-emitting unit 102 can be separately configured, such as... Figures 3 to 7 As shown. Of course, in other embodiments, such as Figure 12 As shown, the second magnetic part 32 of the first sound-emitting unit 101 and the third magnetic part 61 of the second sound-emitting unit 102 can be an integral structure.

[0168] In one implementation, such as Figures 3 to 6 , Figure 12 As shown, the first support plate 321 and the second support plate 611 are integrally formed flat plate structures 617.

[0169] Optionally, the second central magnet 322 and the third central magnet 612 are integrally formed as a first magnet structure 615. The flat plate structure 617 is provided with a first through hole 618 corresponding to the first magnet structure 615, and the first magnet structure 615 passes through the first through hole 618. It can be understood that the first sound-emitting unit 101 and the second sound-emitting unit 102 share the first magnet structure 615 formed by the second magnet part 32 and the third magnet part 61, which simplifies the structural arrangement and reduces the space volume.

[0170] Optionally, the second side magnet 323 and the third side magnet 613 are integrally formed as a second magnet structure 616, and the flat plate structure 617 is provided with a second through hole 619 corresponding to the second magnet structure 616, through which the second magnet structure 616 passes. It is understood that the first sound-emitting unit 101 and the second sound-emitting unit 102 share the second magnet structure 616 of the second magnet part 32 and the third magnet part 61, thus simplifying the structural arrangement and reducing the spatial volume.

[0171] To further improve the connection stability of the first sound-generating unit 101 and the second sound-generating unit 102, in one embodiment, the outer periphery of the first magnetic plate 311 is bent and extended toward the second magnetic plate 621 to form a first welding portion 3111, which is welded to the outer periphery of the second magnetic plate 621. It is understood that by utilizing the first welding portion 3111 of the first magnetic plate 311 of the first sound-generating unit 101 to weld the second magnetic plate 621 of the second sound-generating unit 102, the connection strength is improved, and the drop resistance of the sound-generating device 100 is enhanced. Of course, in other embodiments, the first welding portion 3111 of the first magnetic plate 311 and the second magnetic plate 621 can also be bonded together; this is not limited here.

[0172] In another embodiment, the outer periphery of the second magnetic plate 621 is bent and extended toward the first magnetic plate 311 to form a second welding portion 6211, which is welded to the outer periphery of the first magnetic plate 311. It is understood that this arrangement, by welding the first magnetic plate 311 of the first sound-generating unit 101 to the second magnetic plate 621 of the second sound-generating unit 102, improves the connection strength and enhances the drop resistance of the sound-generating device 100. Of course, in other embodiments, the second welding portion 6211 of the first magnetic plate 311 and the second magnetic plate 621 can also be bonded together; this is not limited here.

[0173] In yet another implementation, such as Figures 1 to 7 As shown, the outer periphery of the first magnetic plate 311 bends and extends toward the second magnetic plate 621 to form a first welding portion 3111, and the outer periphery of the second magnetic plate 621 bends and extends toward the first magnetic plate 311 to form a second welding portion 6211. The first welding portion 3111 and the second welding portion 6211 are welded together. It is understood that this arrangement, by welding the first welding portion 3111 and the second welding portion 6211 together, improves the connection strength and enhances the drop resistance of the sound-generating device 100. Of course, in other embodiments, the first welding portion 3111 and the second welding portion 6211 may also be bonded together; this is not limited here.

[0174] In one embodiment, the first sound-generating unit 101 further includes a first outer shell 1, the two ends of which are respectively connected to a first magnetic plate 311 and a first support plate 321, and the outer periphery of the first diaphragm assembly 21 is connected to the first outer shell 1; the second sound-generating unit 102 further includes a second outer shell 4, the two ends of which are respectively connected to a second magnetic plate 621 and a second support plate 611, and the outer periphery of the second diaphragm assembly 51 is connected to the second outer shell 4.

[0175] In this embodiment, as Figures 1 to 7As shown, by respectively providing a first outer shell 1 and a second outer shell 4, the first vibration system 2 and the first magnetic circuit system 3 of the first sound-generating unit 101 are mounted and fixed using the first outer shell 1, and the second vibration system 5 and the second magnetic circuit system 6 of the second sound-generating unit 102 are mounted and fixed using the second outer shell 4. Optionally, the first outer shell 1 and the second outer shell 4 are integrally formed structures and extend along the first direction, which is not limited here.

[0176] To improve the installation stability of the first sound-generating unit 101, the first outer shell 1 is disposed between the first magnetic part 31 and the second magnetic part 32 of the first sound-generating unit 101, that is, both ends of the first outer shell 1 are connected to the first magnetic guide plate 311 and the first support plate 321, respectively. To avoid interference between the first outer shell 1 and the first welding part 3111 of the first magnetic guide plate 311, the first welding part 3111 of the first magnetic guide plate 311 is located on the outside of the first outer shell 1.

[0177] Understandably, the second outer shell 4 is located between the third magnetic part 61 and the fourth magnetic part 62 of the second sound-emitting unit 102, that is, both ends of the second outer shell 4 are connected to the second magnetic guide plate 621 and the second support plate 611, respectively. In order to avoid interference between the second outer shell 4 and the second welding part 6211 of the second magnetic guide plate 621, the second welding part 6211 of the second magnetic guide plate 621 is located on the outside of the second outer shell 4.

[0178] Optionally, the first support plate 321 and the second support plate 611 are sandwiched between the first outer shell 1 and the second outer shell 4. This arrangement can further improve the installation stability of the first sound-emitting unit 101 and the second sound-emitting unit 102.

[0179] In order to avoid interference between the first magnetic part 31 and the second magnetic part 32 of the first sound-generating unit 101 and the first folded ring 2111 of the first diaphragm assembly 21, in one embodiment, the first diaphragm assembly 21 includes a first folded ring 2111 extending toward the second magnetic part 32, and the inner wall of the first housing 1 is spaced apart from the second side magnet 323 to form a first clearance gap 11 to avoid the first folded ring 2111.

[0180] Understandably, the outer periphery of the first diaphragm assembly 21 is connected to the first housing 1. Optionally, the outer periphery of the first diaphragm assembly 21 is sandwiched between the first housing 1 and the first magnetic plate 311. To ensure the vibration space of the first diaphragm assembly 21, the edge of the first magnetic part 31 facing away from the first diaphragm assembly 21 is recessed towards the direction close to the first diaphragm assembly 21 to form two opposing first recessed edges 3114, and the two first recessed edges 3114 extend along a second direction perpendicular to the first direction.

[0181] In this embodiment, the first magnetic plate 311 includes a first main body 3113 and two first recessed edges 3114 disposed on opposite sides of the first main body 3113. The two first recessed edges 3114 extend toward the direction close to the first diaphragm assembly 21, such that the outer periphery of the first diaphragm assembly 21 is sandwiched between the first recessed edges 3114 and the first outer shell 1.

[0182] In one implementation, such as Figures 1 to 3 , Figures 5 to 7 As shown, the first magnetic plate 311 includes a first main body 3113 and two first recessed edges 3114 disposed on opposite sides of the first main body 3113. A first central magnet 312 and a first side magnet 313 are disposed on the first main body 3113. The two first recessed edges 3114 approach the first diaphragm assembly 21 and are connected to the first housing 1. The outer periphery of the first diaphragm assembly 21 is sandwiched between the first recessed edges 3114 and the first housing 1.

[0183] Understandably, the edge of the first magnetic plate 311 facing away from the first diaphragm assembly 21 forms two first recessed edges 3114. The two first recessed edges 3114 are located on opposite sides of the first main body 3113. The first central magnet 312 and the first side magnet 313 are both located on the first main body 3113. The two first recessed edges 3114 extend obliquely along the first direction toward the first outer shell 1 and are connected to the first outer shell 1. The outer periphery of the first diaphragm assembly 21 is sandwiched between the first recessed edges 3114 and the first outer shell 1.

[0184] In one embodiment, the first recessed edge 3114 includes a first inclined extension and a first horizontal extension. The first horizontal extension is located on the side of the first main body 3113 facing the first diaphragm assembly 21. The first inclined extension extends obliquely from the first main body 3113 toward the first horizontal extension. The outer periphery of the first diaphragm assembly 21 is sandwiched between the first horizontal extension and the first outer shell 1.

[0185] In this embodiment, as Figures 1 to 7As shown, the direction of vibration of the first diaphragm assembly 21 is defined as the first direction, and the first direction is defined as the Z-axis direction. The length direction of the first housing 1 is defined as the second direction, and the second direction is defined as the Y-axis direction. The width direction of the first housing 1 is defined as the third direction, and the third direction is defined as the X-axis direction. That is, the first direction, the second direction, and the third direction are all perpendicular to each other. It can be understood that the first horizontal extension of the first recessed edge 3114 and the first main body 3113 are optionally arranged in parallel along the third direction. The first horizontal extension of the first recessed edge 3114 and the first main body 3113 are arranged vertically spaced along the first direction. The first horizontal extension is located on the side of the first main body 3113 facing the first diaphragm assembly 21. The first inclined extension of the first recessed edge 3114 extends obliquely from the first main body 3113 toward the first horizontal extension. That is, the first inclined extension is obliquely arranged along the third direction.

[0186] Understandably, this arrangement allows the first recessed edge 3114 to support the first main body 3113 away from the first outer shell 1, and the first inclined extension of the first recessed edge 3114 provides clearance and vibration space for the first folded ring 2111 of the first diaphragm assembly 21. In this embodiment, the first recessed edge 3114 is located on the long side of the first main body 3113 along its length. To facilitate the outer periphery of the first diaphragm assembly 21 being sandwiched between the first horizontal extension and the first outer shell 1, the first horizontal extension has a certain width along a third direction, which is not limited here.

[0187] In this embodiment, as Figures 5 to 7 As shown, the first folded ring 2111 of the first diaphragm assembly 21 extends toward the second magnetic part 32, which further avoids interference between the first magnetic plate 311 and the first folded ring 2111. To further avoid interference between the second magnetic part 32 and the first folded ring 2111 of the first diaphragm assembly 21, a first clearance gap 11 is formed by spacing the inner wall of the first housing 1 from the second side magnet 323 of the second magnetic part 32. This clearance gap 11 can be used to avoid the first folded ring 2111 and provide vibration space for the first folded ring 2111. Moreover, under the premise that the first diaphragm assembly 21 has the same amplitude, the above arrangement can reduce the space occupied by the first sound-generating unit 101 along the first direction, and can realize the thin design of the first sound-generating unit 101.

[0188] Optionally, the second magnet 32 ​​is located on the side of the first diaphragm assembly 21 facing the second sound-generating unit 102. The first diaphragm assembly 21 includes a first folded ring 2111 extending toward the second magnet 32. The inner wall of the housing 103 is spaced from the outer periphery of the second magnet 32 ​​to form a first clearance gap 11 to avoid the first folded ring 2111.

[0189] In order to avoid interference between the third magnet 61 and the fourth magnet 62 of the second sound-generating unit 102 and the second folded ring 5111 of the second diaphragm assembly 51, in one embodiment, the second diaphragm assembly 51 includes a second folded ring 5111 extending toward the third magnet 61, and the inner wall of the second housing 4 is spaced apart from the third side magnet 613 to form a second clearance gap 41 to avoid the second folded ring 5111.

[0190] Understandably, the outer periphery of the second diaphragm assembly 51 is connected to the second housing 4. Optionally, the outer periphery of the second diaphragm assembly 51 is sandwiched between the second housing 4 and the second magnetic plate 621. To ensure the vibration space of the second diaphragm assembly 51, the edge of the fourth magnetic part 62 facing away from the second diaphragm assembly 51 is recessed in the direction close to the second diaphragm assembly 51 to form two opposing second recessed edges 6214, which extend along a second direction perpendicular to the first direction.

[0191] In this embodiment, the second magnetic plate 621 includes a second main body 6213 and two second recessed edges 6214 disposed on opposite sides of the second main body 6213. The two second recessed edges 6214 extend toward the direction close to the second diaphragm assembly 51, such that the outer periphery of the second diaphragm assembly 51 is sandwiched between the second recessed edges 6214 and the second outer shell 4.

[0192] In one implementation, such as Figures 1 to 7 As shown, the second magnetic plate 621 includes a second main body 6213 and two second recessed edges 6214 disposed on opposite sides of the second main body 6213. A fourth central magnet 622 and a fourth side magnet 623 are disposed on the second main body 6213. The two second recessed edges 6214 approach the second diaphragm assembly 51 and are connected to the second housing 4. The outer periphery of the second diaphragm assembly 51 is sandwiched between the second recessed edges 6214 and the second housing 4.

[0193] Understandably, the edge of the second magnetic plate 621 facing away from the second diaphragm assembly 51 forms two second recessed edges 6214. The two second recessed edges 6214 are located on opposite sides of the second main body 6213. The fourth central magnet 622 and the fourth side magnet 623 are both located on the second main body 6213. The two second recessed edges 6214 extend obliquely along the first direction toward the direction close to the second outer shell 4 and are connected to the second outer shell 4. The outer periphery of the second diaphragm assembly 51 is sandwiched between the second recessed edges 6214 and the second outer shell 4.

[0194] In one embodiment, the second recessed edge 6214 includes a second inclined extension and a second horizontal extension. The second horizontal extension is located on the side of the second main body 6213 facing the second diaphragm assembly 51. The second inclined extension extends obliquely from the second main body 6213 toward the second horizontal extension. The outer periphery of the second diaphragm assembly 51 is sandwiched between the second horizontal extension and the second housing 4.

[0195] In this embodiment, as Figures 1 to 7 As shown, the direction of vibration of the second diaphragm assembly 51 is defined as the first direction, and the first direction is defined as the Z-axis direction. The length direction of the second housing 4 is defined as the second direction, and the second direction is defined as the Y-axis direction. The width direction of the second housing 4 is defined as the third direction, and the third direction is defined as the X-axis direction. That is, the first direction, the second direction, and the third direction are mutually perpendicular. It can be understood that the second horizontal extension of the second recessed edge 6214 and the second main body 6213 are optionally arranged parallel to each other along the third direction. The second horizontal extension of the second recessed edge 6214 and the second main body 6213 are arranged vertically spaced along the first direction. The second horizontal extension is located on the side of the second main body 6213 facing the second diaphragm assembly 51. The second inclined extension of the second recessed edge 6214 extends obliquely from the second main body 6213 toward the second horizontal extension. That is, the second inclined extension is obliquely arranged along the third direction.

[0196] Understandably, this arrangement allows the second recessed edge 6214 to support the second main body 6213 away from the second outer shell 2, and the second inclined extension of the second recessed edge 6214 provides clearance and vibration space for the second folded ring 5111 of the second diaphragm assembly 51. In this embodiment, the second recessed edge 6214 is located on the long side of the second main body 6213 in the length direction. To facilitate the outer periphery of the second diaphragm assembly 51 being sandwiched between the second horizontal extension and the second outer shell 4, the second horizontal extension has a certain width in the third direction, which is not limited here.

[0197] In this embodiment, as Figures 5 to 7 As shown, the second folded ring 5111 of the second diaphragm assembly 51 extends toward the third magnetic part 61, which further avoids interference between the second magnetic plate 621 and the second folded ring 5111. To further avoid interference between the third magnetic part 61 and the second magnetic plate 621 and the second folded ring 5111, a second clearance gap 41 is formed by spacing the inner wall of the second housing 4 from the third side magnet 613 of the third magnetic part 61. This clearance gap 41 can be used to avoid the second folded ring 5111 and provide vibration space for the second folded ring 5111. Moreover, under the premise that the second diaphragm assembly 51 has the same amplitude, the above arrangement can reduce the space occupied by the second sound-generating unit 102 along the first direction, and can realize the thin design of the second sound-generating unit 102.

[0198] Optionally, the third magnet 61 is located on the side of the second diaphragm assembly 51 facing the first sound-generating unit 101. The second diaphragm assembly 51 includes a second folded ring 5111 extending toward the third magnet 61. The inner wall of the housing 103 is spaced from the outer periphery of the third magnet 61 to form a second clearance gap 41 that avoids the second folded ring 5111.

[0199] In one embodiment, the first vibration system 2 further includes a first centering support 23, which includes a first outer fixing part 231, a first inner fixing part 232, and a first spring arm part 233 connecting the first outer fixing part 231 and the first inner fixing part 232. The first outer fixing part 231 is connected to the first outer shell 1, and the first inner fixing part 232 is connected to the end of the first voice coil 22 facing the first magnet 31.

[0200] In this embodiment, as Figures 2 to 7 , Figure 11 As shown, the first centering support 23 is located on the side of the first voice coil 22 facing away from the second sound-generating unit 102, and is connected to the first housing 1 and the first voice coil 22 respectively. In this way, the first centering support 23 can be used to center the first voice coil 22, avoid the first voice coil 22 from being polarized or oscillating during vibration, and improve the operational stability of the first vibration system 2.

[0201] Understandable, such as Figure 3 , Figure 11 As shown, by configuring the first centering support 23 as a first outer fixing part 231, a first spring arm part 233, and a first inner fixing part 232, the first outer fixing part 231 is connected to the first outer shell 1, and the first inner fixing part 232 is provided with a first solder pad. Thus, when the first inner fixing part 232 is connected to the first voice coil 22, the lead of the first voice coil 22 is electrically connected to the first solder pad, thereby enabling the connection and conduction of external circuits with the first voice coil 22 using the first centering support 23. Optionally, the first spring arm part 233 has at least one bent section.

[0202] It should be noted that there can be one or more first centering supports 23. When there is one first centering support 23, the first outer fixing part 231 of the first centering support 23 is annular, and the first spring arm part 233 and the first inner fixing part 232 include multiple parts, such as two or four first spring arm parts 233 and four first inner fixing parts 232, etc., which is not limited here. When there are multiple first centering supports 23, the first outer fixing part 231, the first spring arm 233 and the first inner fixing part 232 all include multiple parts. In this case, there can be two or four first centering supports 23. For example, when there are two first centering supports 23, the two first centering supports 23 are symmetrically arranged and distributed along the major axis or minor axis of the first outer shell 1; or, when there are four first centering supports 23, the four first centering supports 23 are arranged corresponding to the four corners of the first outer shell 1, which is not limited here.

[0203] In one implementation, such as Figure 3 , Figure 11 As shown, the first central magnet 312 includes two first long sides 3121 and two first short sides 3122 connected end to end. The first side magnets 313 include two, which are symmetrically arranged on opposite sides of the first central magnet 312 and are respectively opposite to and spaced apart from the two first long sides 3121.

[0204] When the first centering support 23 includes one, the first external fixing part 231 is annular, and the first elastic arm part 233 and the first internal fixing part 232 each include four. The two ends of each first elastic arm part 233 are respectively connected to the first external fixing part 231 and a first internal fixing part 232. The four first elastic arms part 233 and the four first internal fixing parts 232 are all located inside the first external fixing part 231. Two first elastic arms part 233 and two first internal fixing parts 232 are correspondingly arranged with a first short side 3122, and the other two first elastic arms part 233 and the other two first internal fixing parts 232 are correspondingly arranged with another first short side 3122.

[0205] When there are two first centering support plates 23, the two first centering support plates 23 are respectively provided corresponding to the two first short sides 3122. It can be understood that each first centering support plate 23 includes a first outer fixing part 231, at least one first elastic arm part 233 and two first inner fixing parts 232, which are not limited here.

[0206] When there are four first centering support plates 23, two first centering support plates 23 are correspondingly arranged with the two ends of one first short side 3122, and the other two first centering support plates 23 are correspondingly arranged with the two ends of another first short side 3122. It can be understood that each first centering support plate 23 includes a first external fixing part 231, a first elastic arm part 233, and a first internal fixing part 232, which is not limited here.

[0207] In one embodiment, the second vibration system 5 further includes a second centering support 53, which includes a second outer fixing part 531, a second inner fixing part 532, and a second spring arm part 533 connecting the second outer fixing part 531 and the second inner fixing part 532. The second outer fixing part 531 is connected to the second outer shell 4, and the second inner fixing part 532 is connected to the end of the second voice coil 52 facing the fourth magnet 62.

[0208] In this embodiment, as Figures 2 to 7 , Figure 11 As shown, the second centering support 53 is located on the side of the second voice coil 52 facing away from the first sound-generating unit 101, and is connected to the second housing 4 and the second voice coil 52 respectively. In this way, the second centering support 53 can be used to center the second voice coil 52, preventing the second voice coil 52 from being polarized or oscillating during vibration, and improving the operational stability of the second vibration system 5.

[0209] Understandable, such as Figure 3 , Figure 11 As shown, by configuring the second centering support 53 as a second outer fixing part 531, a second spring arm part 533, and a second inner fixing part 532, the second outer fixing part 531 is connected to the second outer casing 4, and the second inner fixing part 532 is provided with a second solder pad. Thus, when the second inner fixing part 532 is connected to the second voice coil 52, the lead of the second voice coil 52 is electrically connected to the second solder pad, thereby enabling the connection and conduction of external circuits with the second voice coil 52 using the second centering support 53. Optionally, the second spring arm part 533 has at least one bent section.

[0210] It should be noted that there can be one or more second centering supports 53. When there is one second centering support 53, the second outer fixing part 531 of the second centering support 53 is annular, and the second spring arm part 533 and the second inner fixing part 532 include multiple parts, such as two or four second spring arm parts 533 and four second inner fixing parts 532, etc., which is not limited here. When there are multiple second centering supports 53, the second outer fixing part 531, the second spring arm 533 and the second inner fixing part 532 all include multiple parts. In this case, there can be two or four second centering supports 53. For example, when there are two second centering supports 53, the two second centering supports 53 are symmetrically arranged and distributed along the major axis or minor axis of the second outer shell 4; or, when there are four second centering supports 53, the four second centering supports 53 are arranged corresponding to the four corners of the second outer shell 4, which is not limited here.

[0211] In one implementation, such as Figure 3 , Figure 11As shown, the fourth central magnet 622 includes two second long sides 6221 and two second short sides 6222 connected end to end. The fourth side magnet 623 includes two magnets. The two fourth side magnets 623 are symmetrically arranged on opposite sides of the fourth central magnet 622, and are respectively opposite to and spaced apart from the two second long sides 6221.

[0212] When the second centering support 53 includes one, the second external fixing part 531 is annular, and the second elastic arm part 533 and the second internal fixing part 532 each include four. The two ends of each second elastic arm part 533 are respectively connected to the second external fixing part 531 and a second internal fixing part 532. The four second elastic arms part 533 and the four second internal fixing parts 532 are all located inside the second external fixing part 531, and two second elastic arms part 533 and two second internal fixing parts 532 correspond to a second short side 6222, and the other two second elastic arms part 533 and the other two second internal fixing parts 532 correspond to another second short side 6222.

[0213] When there are two second centering supports 53, the two second centering supports 53 correspond to the two second short sides 6222 respectively. It can be understood that each second centering support 53 includes a second outer fixing part 531, at least one second elastic arm part 533 and two second inner fixing parts 532, which is not limited here.

[0214] When there are four second centering support plates 53, two second centering support plates 53 are correspondingly arranged with the two ends of one second short side 6222, and the other two second centering support plates 53 are correspondingly arranged with the two ends of another second short side 6222. It can be understood that each second centering support plate 53 includes a second outer fixing part 531, a second spring arm part 533, and a second inner fixing part 532, which is not limited here.

[0215] Optionally, the first centering support 23 and the second centering support 53 are arranged symmetrically with respect to the flat plate structure 617.

[0216] In one embodiment, the distance between the end face of the first voice coil 22 facing the first magnet 31 and the first magnet 31 is the same as the distance between the end face of the first voice coil 22 facing the second magnet 32 ​​and the second magnet 32.

[0217] Understandable, such as Figures 5 to 7 As shown, when the first sound-generating unit 101 is not working, the distance between the end face of the first voice coil 22 facing the first magnet 31 and the first magnet 31 is the same as the distance between the end face of the first voice coil 22 facing the second magnet 32 ​​and the second magnet 32. This ensures that when the first voice coil 22 vibrates along the first direction, it can receive the same driving force in the first magnet 31 and the second magnet 32, so as to ensure that the opposite sides of the first diaphragm assembly 21 can produce the same loudness.

[0218] In one embodiment, the distance between the end face of the second voice coil 52 facing the third magnet 61 and the third magnet 61 is the same as the distance between the end face of the second voice coil 52 facing the fourth magnet 62 and the fourth magnet 62.

[0219] Understandable, such as Figures 5 to 7 As shown, when the second sound-generating unit 102 is not working, the distance between the end face of the second voice coil 52 facing the third magnet 61 and the third magnet 61 is the same as the distance between the end face of the second voice coil 52 facing the fourth magnet 62 and the fourth magnet 62. This ensures that when the second voice coil 52 vibrates in the first direction, it can be subjected to the same driving force on the third magnet 61 and the fourth magnet 62, so as to ensure that the opposite sides of the first diaphragm assembly 21 can produce the same loudness.

[0220] In one embodiment, a first cavity 24 is formed between the first diaphragm assembly 21 and the first magnetic part 31, and a second cavity 25 is formed between the first diaphragm assembly 21 and the second magnetic part 32; a third cavity 54 is formed between the second diaphragm assembly 51 and the third magnetic part 61, and a fourth cavity 55 is formed between the second diaphragm assembly 51 and the fourth magnetic part 62; wherein, the first outer shell 1 is provided with a first sound outlet 12 communicating with the second cavity 25, the second outer shell 4 is provided with a second sound outlet 42 communicating with the third cavity 54, the first magnetic plate 311 is provided with a third sound outlet 3112 communicating with the first cavity 24, and the second magnetic plate 621 is provided with a fourth sound outlet 6212 communicating with the fourth cavity 55.

[0221] In this embodiment, as Figures 1 to 7 As shown, by providing sound outlet holes on the first sound-emitting unit 101 and the second sound-emitting unit 102 respectively, it is convenient to use the sound outlet holes to emit sound from the first sound-emitting unit 101 and the second sound-emitting unit 102 respectively. At the same time, by providing vent holes on the first sound-emitting unit 101 and the second sound-emitting unit 102 respectively, it is convenient to use the vent holes to adjust the pressure inside the first sound-emitting unit 101 and the second sound-emitting unit 102.

[0222] Understandably, the first housing 1 of the first sound-generating unit 101 is provided with a first sound outlet 12, and a third sound outlet 3112 is provided on the first magnetic plate 311. The first sound outlet 12 connects to the second cavity 25, and the third sound outlet 3112 connects to the first cavity 24, allowing the first sound-generating unit 101 to emit sound or release air through the first sound outlet 12 / third sound outlet 3112, thus ensuring the pressure difference between the two sides of the first diaphragm assembly 21. Simultaneously, the second housing 4 of the second sound-generating unit 102 is provided with a second sound outlet 42, and a fourth sound outlet 6212 is provided on the second magnetic plate 621. The second sound outlet 42 connects to the third cavity 54, and the fourth sound outlet 6212 connects to the fourth cavity 55, allowing the second sound-generating unit 102 to emit sound or release air through the second sound outlet 42 / fourth sound outlet 6212, thus ensuring the pressure difference between the two sides of the second diaphragm assembly 51.

[0223] In this embodiment, as Figures 1 to 3 , Figures 5 to 7 As shown, the first sound outlet 12 and the second sound outlet 42 are located on the same side of the sound-generating device 100. It is understandable that with this arrangement, when the sound-generating device 100 is applied to the electronic device 800, the first sound outlet 12 and the second sound outlet 42 of the sound-generating device 100 can be easily connected to the front cavity 740. Alternatively, the electronic device 800 can also be provided with sound outlets 710 that are directly connected to the first sound outlet 12 and the second sound outlet 42, respectively.

[0224] Optionally, the first sound outlet 12 includes multiple first sound outlets 12, which are spaced apart and all communicate with the second cavity 25. This arrangement allows for smooth and rapid airflow of sound waves in the second cavity 25, thereby improving the sound production effect.

[0225] Optionally, multiple second sound outlets 42 are provided, spaced apart, and all are connected to the third cavity 54. This arrangement allows for smooth and rapid airflow of sound waves into the third cavity 54, thereby improving the sound output.

[0226] Optionally, multiple third sound outlets 3112 are provided, spaced apart, and all are connected to the first cavity 24. This arrangement facilitates smooth and rapid airflow of sound waves into the first cavity 24, thereby improving the sound output effect.

[0227] Optionally, multiple fourth sound outlets 6212 are provided, spaced apart, and all are connected to the fourth cavity 55. This arrangement facilitates smooth and rapid airflow of sound waves into the fourth cavity 55, thereby improving the sound production effect.

[0228] In one embodiment, the first diaphragm assembly 21 radiates a first sound wave to the first cavity 24 and a second sound wave to the second cavity 25, the first and second sound waves being out of phase; the second diaphragm assembly 51 radiates a third sound wave to the third cavity 54 and a fourth sound wave to the fourth cavity 55, the third and fourth sound waves being out of phase.

[0229] In this embodiment, when the sound-generating device 100 is applied in the electronic device 800, it is connected to the first cavity 24, the second cavity 25, the third cavity 54, and the fourth cavity 55 through the sound output channel or the venting channel, respectively, so as to realize sound wave superposition or far-field noise reduction, thereby improving the sound-generating performance of the sound-generating device 100 and enhancing the user experience.

[0230] Optionally, the second and third sound waves are in phase, and the first and fourth sound waves are in phase. In one embodiment, the first diaphragm assembly 21 and the second diaphragm assembly 51 radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity 25 and the third cavity 54, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity 24 and the fourth cavity 55.

[0231] In this embodiment, by connecting the first sound outlet channel to the second cavity 25 and the third cavity 54 respectively, when both the second and third sound waves radiate outward through the first sound outlet channel, the sound waves are superimposed due to their identical phases, thus increasing the loudness. Simultaneously, by connecting the second sound outlet channel (i.e., the venting channel) to the first cavity 24 and the fourth cavity 55 respectively, venting of the first and fourth cavities 24 and 55 is achieved, ensuring the vibration performance of the first diaphragm assembly 21 and the second diaphragm assembly 51; or, by connecting the second sound outlet channel to the first cavity 24 and the fourth cavity 55 respectively, when both the first and fourth sound waves radiate outward through the second sound outlet channel, the sound waves are superimposed due to their identical phases, thus increasing the loudness. In this case, since the first and second sound waves are out of phase, the third sound wave and the second sound wave are superimposed due to their identical phases, thus increasing the loudness. The four sound waves are out of phase. This means that when the sound waves radiate outward from the two sound channels, from a fixed position at a relatively far distance in the environment, 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, so that the two sound waves will produce 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 sound generating device 100 during use, protects the user's privacy, and improves the user experience.

[0232] Optionally, the first and third sound waves are in phase, and the second and fourth sound waves are in phase. In one embodiment, the first diaphragm assembly 21 and the second diaphragm assembly 51 radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity 24 and the third cavity 54, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity 25 and the fourth cavity 55.

[0233] In this embodiment, by connecting the first sound outlet channel to both the first cavity 24 and the third cavity 54, when both the first and third sound waves radiate outward through the first sound outlet channel, the sound waves are superimposed due to their identical phases, thus increasing the loudness. Simultaneously, by connecting the second sound outlet channel (i.e., the venting channel) to both the second cavity 25 and the fourth cavity 55, venting of the second and fourth cavities 55 is achieved, ensuring the vibration performance of the first diaphragm assembly 21 and the second diaphragm assembly 51. Alternatively, by connecting the second sound outlet channel to both the second cavity 25 and the fourth cavity 55, when both the second and fourth sound waves radiate outward through the second sound outlet channel, the sound waves are superimposed due to their identical phases, thus increasing the loudness. In this case, since the first and second sound waves are out of phase, the third sound wave and the second diaphragm assembly 54 are superimposed due to their identical phases, thus increasing the loudness. The four sound waves are out of phase. This means that when the sound waves radiate outward from the two sound channels, from a fixed position at a relatively far distance in the environment, 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, so that the two sound waves will produce 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 sound generating device 100 during use, protects the user's privacy, and improves the user experience.

[0234] Understandably, when the sound-generating device 100 is applied to the electronic device 800, the external outline of the electronic device 800 can be a regular structure or an irregular structure. The external structure of the sound-generating device 100 is influenced and limited by the external outline of the device housing of the electronic device 800, and will change accordingly. When the external outline of the device housing of the electronic device 800 is an irregular structure, the external structure of the sound-generating device 100 will also be an irregular structure.

[0235] In one embodiment, the housing of the sound-generating device 100 forms a clearance structure to avoid irregular structures of the device housing. It is understood that the first sound-generating unit 101 and / or the second sound-generating unit 102 of the sound-generating device 100 are asymmetrically or irregularly arranged in relation to this clearance structure.

[0236] It should be noted that the regular or symmetrical structure of the sound-generating device 100 means that both sides of the housing are symmetrically arranged along the central axis of either the major or minor axis, such as a regular polygonal structure like a circle, ellipse, or square. The irregular or asymmetrical structure of the sound-generating device 100 means that at least one side of the housing is asymmetrically arranged along the central axis of either the major or minor axis, such as... Figures 1 to 3 As shown, no limitations are specified here.

[0237] Optionally, the first sound-generating unit 101 of the sound-generating device 100 forms a clearance structure. In one embodiment, the first housing 1 has a first clearance portion 13. It is understood that the first clearance portion 13 may be a chamfered angle or an arcuate surface to facilitate clearance from irregular structures of the device housing.

[0238] In this embodiment, the first vibration system 2 and the first magnetic circuit system 3 of the first sound-generating unit 101 are both provided with clearance structures corresponding to the first clearance portion 13. Optionally, the first diaphragm assembly 21 of the first vibration system 2 is provided with a second clearance portion 2112 corresponding to the first clearance portion 13, so that the first diaphragm assembly 21 is formed into an asymmetrical structure. The second clearance portion 2112 may be a chamfered angle or an arc-shaped surface, which is not limited here.

[0239] Understandably, by setting the first diaphragm assembly 21 of the first sound-generating unit 101 to an asymmetrical structure, the first diaphragm assembly 21 can make full use of the unused space in the whole machine, and the asymmetrical structure of the first diaphragm assembly 21 can form a larger Sd, further increasing the radiation area of ​​the first diaphragm assembly 21 and improving the performance of the first sound-generating unit 101. Moreover, the fit between the first sound-generating unit 101 and the whole machine is more compact, saving assembly space.

[0240] Understandably, the first centering support 23 of the first vibration system 2 is provided with a clearance structure that conforms to the contour of the first clearance portion 13, so that the first centering support 23 is formed as an asymmetrical structure. The first magnetic plate 311 and the first support plate 321 of the first magnetic circuit system 3 are respectively provided with clearance structures that conform to the contour of the first clearance portion 13, which are not limited here.

[0241] Optionally, the second sound-generating unit 102 of the sound-generating device 100 forms a clearance structure. In one embodiment, the second housing 4 has a third clearance portion 43. It is understood that the third clearance portion 43 may be a chamfered angle or an arcuate surface to facilitate clearance from irregular structures of the device housing.

[0242] In this embodiment, the second vibration system 5 and the second magnetic circuit system 6 of the second sound-generating unit 102 are both provided with clearance structures corresponding to the third clearance portion 43. Optionally, the second diaphragm assembly 51 of the second vibration system 5 is provided with a fourth clearance portion 5112 corresponding to the third clearance portion 43, so that the second diaphragm assembly 51 is formed as an asymmetrical structure. The fourth clearance portion 5112 may be a chamfered angle or an arc-shaped surface, which is not limited here.

[0243] Understandably, by setting the second diaphragm assembly 51 of the second sound-emitting unit 102 to an asymmetrical structure, the second diaphragm assembly 51 can make full use of the unused space in the whole unit, and the asymmetrical structure of the second diaphragm assembly 51 can form a larger Sd, further increasing the radiation area of ​​the second diaphragm assembly 51 and improving the performance of the second sound-emitting unit 102. Moreover, the fit between the second sound-emitting unit 102 and the whole unit is more compact, saving assembly space.

[0244] Understandably, the second centering support 53 of the second vibration system 5 has a clearance structure that matches the contour of the third clearance portion 43, so that the second centering support 53 is formed as an asymmetrical structure. The second magnetic guide plate 621 and the second support plate 611 of the second magnetic circuit system 6 are respectively provided with clearance structures that match the contour of the third clearance portion 43 corresponding to the third clearance portion 43, which are not limited here.

[0245] like Figures 14 to 17 As shown, this utility model also proposes an electronic device 800, which includes 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.

[0246] In one embodiment, the electronic device 800 further includes a device housing 700, and the sound-emitting device 100 is disposed within the device housing 700. In this embodiment, as... Figures 4 to 7 , Figure 17 As shown, a first cavity 24 is formed between the first diaphragm assembly 21 and the first magnetic part 31 of the sound-generating device 100, a second cavity 25 is formed between the first diaphragm assembly 21 and the second magnetic part 32, a third cavity 54 is formed between the second diaphragm assembly 51 and the third magnetic part 61, and a fourth cavity 55 is formed between the second diaphragm assembly 51 and the fourth magnetic part 62.

[0247] Optionally, the first diaphragm assembly 21 and the second diaphragm assembly 51 radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity 25 and the third cavity 54, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity 24 and the fourth cavity 55. In this embodiment, the first sound outlet channel includes a sound outlet 710 provided on the device housing 700, and the second sound outlet channel includes a vent 720 provided on the device housing 700.

[0248] Understandably, the electronic device 800 can emit sound through the sound outlet 710 and vent through the vent 720. When both the sound outlet 710 and the vent 720 of the electronic device 800 radiate sound waves outward, 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, greatly improving the sound leakage problem of the electronic device 800 during use, protecting user privacy, and improving user experience.

[0249] Optionally, the first diaphragm assembly 21 and the second diaphragm assembly 51 radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity 24 and the third cavity 54, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity 25 and the fourth cavity 55. In this embodiment, the first sound outlet channel includes a sound outlet 710 provided on the device housing 700, and the second sound outlet channel includes a vent 720 provided on the device housing 700.

[0250] Understandably, the electronic device 800 can emit sound through the sound outlet 710 and vent through the vent 720. When both the sound outlet 710 and the vent 720 of the electronic device 800 radiate sound waves outward, 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, greatly improving the sound leakage problem of the electronic device 800 during use, protecting user privacy, and improving user experience.

[0251] It should be noted that the sound-generating device 100 is located inside the equipment housing 700. The equipment housing 700 is provided with a sound outlet 710 that is directly connected to the first sound outlet 12 and the second sound outlet 42. The equipment housing 700 is also provided with a vent 720 that is directly connected to the third sound outlet 3112 and the fourth sound outlet 6212. These are not limited here.

[0252] In another embodiment, the electronic device 800 further includes a device housing 700, which has a mounting cavity 730. The sound-generating device 100 is disposed within the mounting cavity 730 of the device housing 700, forming a spaced-apart front cavity 740 and rear cavity 750. To facilitate sound output and venting, the device housing 700 also has a sound outlet 710 communicating with the front cavity 740 and a vent 720 communicating with the rear cavity 750.

[0253] In this embodiment, as Figure 14 , Figure 15 , Figure 17 As shown, the first sound outlet 12 and the second sound outlet 42 of the sound-generating device 100 are connected to the front cavity 740, and the third sound outlet 3112 and the fourth sound outlet 6212 of the sound-generating device 100 are connected to the rear cavity 750. Thus, the electronic device 800 can generate sound through the sound outlet 710 and vent through the vent 720. Utilizing the sound waves radiated outward from the sound outlet 710 and the vent 720, 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, greatly improving the sound leakage problem of the electronic device 800 during use, protecting user privacy, and improving user experience.

[0254] It is understood that the electronic device 800 can be a mobile phone, headphones, smart wearable devices, etc., and is not limited here. The smart wearable device can be smart glasses or AR / VR / MR glasses, etc., and is not limited here. This embodiment uses smart glasses as an example for explanation.

[0255] In this embodiment, as Figures 14 to 17 As shown, the smart glasses include a frame and temples. The temples are provided with a mounting cavity 730, and a sound-generating device 100 is disposed in the mounting cavity 730. The temples have recessed grooves for accommodating the ears, so that the inner wall of the mounting cavity 730 forms a protrusion corresponding to the recessed groove. The first clearance portion 13 of the sound-generating device 100 corresponds to the protrusion to avoid the protrusion.

[0256] Understandable, such as Figure 17As shown, the inner wall of the mounting cavity 730 of the temple of the glasses includes a first side and a second side disposed opposite to each other. The two sides of the first side are respectively provided with a first transition portion that bends and extends toward the sound-generating device 100. The two first recessed edges 3114 of the sound-generating device 100 are respectively disposed corresponding to the two first transition portions. Thus, when the sound-generating device 100 is applied to smart glasses, the first recessed edges 3114 can easily avoid the first transition portion of the first side of the temple of the smart glasses protruding toward the sound-generating device 100 at the corner position, thereby making the fitting structure between the sound-generating device 100 and the smart glasses more compact.

[0257] Furthermore, each side of the second side is provided with a second transition portion that bends and extends toward the sound-generating device 100, and the two second recessed edges 6214 of the sound-generating device 100 are respectively provided with the two second transition portions. In this way, when the sound-generating device 100 is used in smart glasses, the second recessed edges 6214 can be used to avoid the second transition portion that protrudes toward the sound-generating device 100 at the corner of the second side of the temple of the smart glasses, thereby making the fitting structure of the sound-generating device 100 and the smart glasses more compact.

[0258] Therefore, by having the first recessed edge 3114 cooperate with the first transition portion and the second recessed edge 6214 cooperate with the second transition portion, the fit between the sound-generating device 100 and the temple of the glasses can be made more compact, which can achieve the effect of thinning.

[0259] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes a first sound-generating unit and a second sound-generating unit arranged back to back. The first sound-generating unit includes a first vibration system and a first magnetic circuit system, and the second sound-generating unit includes a second vibration system and a second magnetic circuit system. Both the first vibration system and the second vibration system vibrate along a first direction. The first vibration system includes a first diaphragm assembly and a first voice coil connected to the first diaphragm assembly. The first magnetic circuit system includes a first magnetic part and a second magnetic part located on opposite sides of the first diaphragm assembly along the first direction. The first magnetic part has a first magnetic gap corresponding to one end of the first voice coil, and the second magnetic part has a second magnetic gap corresponding to the other end of the first voice coil. The second vibration system includes a second diaphragm assembly and a second voice coil connected to the second diaphragm assembly. The second magnetic circuit system includes a third magnetic part and a fourth magnetic part located on opposite sides of the second diaphragm assembly along the first direction. The third magnetic part has a third magnetic gap corresponding to one end of the second voice coil, and the fourth magnetic part has a fourth magnetic gap corresponding to the other end of the second voice coil.

2. The sound-generating device as described in claim 1, characterized in that, The first voice coil includes a first sub-voice coil and a second sub-voice coil disposed on opposite sides of the first diaphragm assembly. The first sub-voice coil is disposed corresponding to the first magnetic gap, and the second sub-voice coil is disposed corresponding to the second magnetic gap. And / or, the second voice coil includes a third sub-voice coil and a fourth sub-voice coil disposed on opposite sides of the second diaphragm assembly, wherein the third sub-voice coil is disposed corresponding to the third magnetic gap, and the fourth sub-voice coil is disposed corresponding to the fourth magnetic gap.

3. The sound-generating device as described in claim 1, characterized in that, The first voice coil is an integrally wound structure and extends along the first direction; And / or, the second voice coil is an integrally wound structure and extends along the first direction.

4. The sound-generating device as described in claim 1, characterized in that, The first diaphragm assembly includes a first diaphragm and a first diaphragm plate connected to the inner side of the first diaphragm; wherein the first diaphragm plate is an integrally formed structure; or, the first diaphragm plate includes a first inner diaphragm plate connected to the inner wall of the first voice coil and a first outer diaphragm plate connected to the outer wall of the first voice coil, wherein the first outer diaphragm plate is connected to the first diaphragm. And / or, the second diaphragm assembly includes a second diaphragm and a second diaphragm plate connected to the inner side of the second diaphragm; wherein the second diaphragm plate is an integrally formed structure; or, the second diaphragm plate includes a second inner diaphragm plate connected to the inner wall of the second voice coil and a second outer diaphragm plate connected to the outer wall of the second voice coil, wherein the second outer diaphragm plate is connected to the second diaphragm.

5. The sound-generating device as described in claim 1, characterized in that, The first magnetic part includes a first magnetic plate and a first central magnet and a first side magnet disposed on the first magnetic plate. The first side magnet is located outside the first central magnet and is spaced apart from the first central magnet to form the first magnetic gap. The second magnetic part includes a first support plate and a second central magnet and a second side magnet disposed on the first support plate. The second side magnet is located outside the second central magnet and is spaced apart from the second central magnet to form the second magnetic gap. The third magnetic part is connected to the side of the first support plate facing away from the first diaphragm assembly. The sides of the first central magnet and the first side magnet facing the first diaphragm assembly are both exposed in the internal cavity of the first sound-generating unit; the sides of the second central magnet and the second side magnet facing the first diaphragm assembly are also exposed in the internal cavity of the first sound-generating unit.

6. The sound-generating device as described in claim 5, characterized in that, The first central magnet and the first side magnet are both magnetized along the first direction, and the magnetization directions are opposite; the second central magnet and the second side magnet are both magnetized along the first direction, and the magnetization directions are opposite; the first central magnet and the second central magnet are magnetized in opposite directions, the first side magnet and the second side magnet are magnetized in opposite directions, and the first magnetic gap and the second magnetic gap include a first magnetic field line dense region located between the first magnetic part and the second magnetic part along the first direction to accommodate the first voice coil; And / or, the first central magnet and the second central magnet are symmetrically arranged with respect to the first diaphragm assembly; And / or, the first side magnet and the second side magnet are symmetrically arranged with respect to the first diaphragm assembly; And / or, the first side magnet includes two, and the two first side magnets are symmetrically arranged on opposite sides of the first central magnet; And / or, the second side magnet includes two, and the two second side magnets are symmetrically arranged on opposite sides of the second central magnet; And / or, the first voice coil is an integrally wound structure and extends along the first direction, the first voice coil has a height along the first direction and a thickness along a third direction, the first direction is perpendicular to the third direction, the height of the first voice coil is greater than the thickness of the first voice coil, the first magnetic gap includes a first gap located between the first center magnet and the first side magnet in the third direction, the second magnetic gap includes a second gap located between the second center magnet and the second side magnet in the third direction, and the thickness of the first voice coil is less than the width of the first gap and the second gap.

7. The sound-generating device as described in claim 5, characterized in that, The third magnetic part includes a second support plate and a third central magnet and a third side magnet disposed on the second support plate. The third side magnet is located outside the third central magnet and is spaced apart from the third central magnet to form the third magnetic gap. The side of the second support plate facing away from the second diaphragm assembly is connected to the side of the first support plate facing away from the first diaphragm assembly. The fourth magnetic part includes a second magnetic plate and a fourth central magnet and a fourth side magnet disposed on the second magnetic plate. The fourth side magnet is located outside the fourth central magnet and is spaced apart from the fourth central magnet to form the fourth magnetic gap. The third central magnet and the third side magnet are both exposed in the internal cavity of the second sound-generating unit on the side facing the second diaphragm assembly; the fourth central magnet and the fourth side magnet are both exposed in the internal cavity of the second sound-generating unit on the side facing the second diaphragm assembly.

8. The sound-generating device as claimed in claim 7, characterized in that, The third central magnet and the third lateral magnet are both magnetized along the first direction, and the magnetization directions are opposite; the fourth central magnet and the fourth lateral magnet are both magnetized along the first direction, and the magnetization directions are opposite; the magnetization directions of the third central magnet and the fourth central magnet are opposite, and the magnetization directions of the third lateral magnet and the fourth lateral magnet are opposite; the third magnetic gap and the fourth magnetic gap include a second magnetic field line dense region located between the third magnetic part and the fourth magnetic part along the first direction to accommodate the second voice coil; And / or, the third central magnet and the fourth central magnet are symmetrically arranged with respect to the second diaphragm assembly; And / or, the third side magnet and the fourth side magnet are symmetrically arranged with respect to the second diaphragm assembly; And / or, the third side magnet includes two, and the two third side magnets are symmetrically arranged on opposite sides of the third central magnet; And / or, the fourth side magnet includes two, and the two fourth side magnets are symmetrically arranged on opposite sides of the fourth central magnet; And / or, the first support plate and the second support plate are integrally formed structures or separate structures; wherein, when the first support plate and the second support plate are separate structures, the first support plate and the second support plate are bonded or welded together. And / or, the second voice coil is an integrally wound structure and extends along the first direction. The second voice coil has a height along the first direction and a thickness along a third direction. The first direction is perpendicular to the third direction. The height of the second voice coil is greater than the thickness of the second voice coil. The third magnetic gap includes a third gap located between the third center magnet and the third side magnet in the third direction. The fourth magnetic gap includes a fourth gap located between the fourth center magnet and the fourth side magnet in the third direction. The thickness of the second voice coil is less than the width of the third gap and the fourth gap.

9. The sound-generating device as claimed in claim 7, characterized in that, The first support plate and the second support plate are integrally formed flat plate structures; Wherein, the second central magnet and the third central magnet are symmetrically arranged with respect to the plate structure, and the second side magnet and the third side magnet are symmetrically arranged with respect to the plate structure; and / or, the first diaphragm assembly and the second diaphragm assembly are symmetrically arranged with respect to the plate structure; and / or, the plate structure is made of a magnetically conductive material; or, the plate structure is made of a non-magnetically conductive material.

10. The sound-generating device as claimed in claim 7, characterized in that, The second central magnet and the third central magnet are both magnetized along the first direction, and the magnetization directions are the same; the second side magnet and the third side magnet are both magnetized along the first direction, and the magnetization directions are the same; the magnetization directions of the second central magnet and the third central magnet are opposite to the magnetization directions of the second side magnet and the third side magnet, so that the second magnetic part and the third magnetic part together form a single magnetic circuit that can simultaneously drive the first voice coil and the second voice coil; Both the first central magnet and the fourth central magnet are magnetized along the first direction, and the magnetization directions are the same; both the first side magnet and the fourth side magnet are magnetized along the first direction, and the magnetization directions are the same; the magnetization directions of the first central magnet and the fourth central magnet are opposite to the magnetization directions of the first side magnet and the fourth side magnet. The magnetization directions of the first central magnet and the fourth central magnet are opposite to those of the second central magnet and the third central magnet, and the magnetization directions of the first side magnet and the fourth side magnet are opposite to those of the second side magnet and the third side magnet.

11. The sound-generating device as claimed in claim 7, characterized in that, The first support plate and the second support plate are integrally formed flat plate structures; Wherein, the second central magnet and the third central magnet are integrally formed first magnet structures, the plate structure is provided with a first through hole corresponding to the first magnet structure, and the first magnet structure passes through the first through hole; and / or, the second side magnet and the third side magnet are integrally formed second magnet structures, the plate structure is provided with a second through hole corresponding to the second magnet structure, and the second magnet structure passes through the second through hole.

12. The sound-generating device as claimed in claim 7, characterized in that, The outer periphery of the first magnetic plate bends and extends toward the second magnetic plate to form a first welding part, and the first welding part is welded to the outer periphery of the second magnetic plate. And / or, the outer periphery of the second magnetic plate bends and extends toward the first magnetic plate to form a second welding part, and the second welding part is welded to the outer periphery of the first magnetic plate; And / or, the outer periphery of the first magnetic plate bends and extends toward the second magnetic plate to form a first welding part, and the outer periphery of the second magnetic plate bends and extends toward the first magnetic plate to form a second welding part, and the first welding part and the second welding part are welded together.

13. The sound-generating device as claimed in claim 7, characterized in that, The first sound-generating unit further includes a first housing, with both ends of the first housing connected to the first magnetic plate and the first support plate, respectively, and the outer periphery of the first diaphragm assembly connected to the first housing; The second sound-generating unit also includes a second housing, the two ends of which are respectively connected to the second magnetic plate and the second support plate, and the outer periphery of the second diaphragm assembly is connected to the second housing; Wherein, the first housing and the second housing are integrally formed structures and extend along the first direction; and / or, the first diaphragm assembly includes a first folded ring extending toward the second magnet, and the inner wall of the first housing is spaced apart from the second side magnet to form a first clearance gap to avoid the first folded ring; and / or, the second diaphragm assembly includes a second folded ring extending toward the third magnet, and the inner wall of the second housing is spaced apart from the third side magnet to form a second clearance gap to avoid the second folded ring.

14. The sound-generating device as claimed in claim 13, characterized in that, A first cavity is formed between the first diaphragm assembly and the first magnet, and a second cavity is formed between the first diaphragm assembly and the second magnet. A third cavity is formed between the second diaphragm assembly and the third magnet, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnet. The first outer shell is provided with a first sound outlet hole communicating with the second cavity, the second outer shell is provided with a second sound outlet hole communicating with the third cavity, the first magnetic plate is provided with a third sound outlet hole communicating with the first cavity, and the second magnetic plate is provided with a fourth sound outlet hole communicating with the fourth cavity.

15. The sound-generating device as claimed in claim 14, characterized in that, The first diaphragm assembly radiates a first sound wave into the first cavity, and the first diaphragm assembly radiates a second sound wave into the second cavity, wherein the first sound wave and the second sound wave are out of phase. The second diaphragm assembly radiates a third sound wave into the third cavity and a fourth sound wave into the fourth cavity, wherein the third sound wave and the fourth sound wave are out of phase. Wherein, the second sound wave and the third sound wave are in phase, and the first sound wave and the fourth sound wave are in phase; or, the first sound wave and the third sound wave are in phase, and the second sound wave and the fourth sound wave are in phase.

16. The sound-generating device as claimed in claim 1, characterized in that, A first cavity is formed between the first diaphragm assembly and the first magnet, and a second cavity is formed between the first diaphragm assembly and the second magnet. A third cavity is formed between the second diaphragm assembly and the third magnet, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnet. Wherein, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity and the fourth cavity; Alternatively, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity and the fourth cavity.

17. The sound-generating device as claimed in claim 13, characterized in that, The first magnetic plate includes a first main body and two first recessed edges disposed on opposite sides of the first main body. The first central magnet and the first side magnet are disposed on the first main body. The two first recessed edges are close to the first diaphragm assembly and connected to the first housing. The outer periphery of the first diaphragm assembly is sandwiched between the first recessed edges and the first housing. And / or, the second magnetic plate includes a second main body and two second recessed edges disposed on opposite sides of the second main body, the fourth central magnet and the fourth side magnet are disposed on the second main body, the two second recessed edges are close to the second diaphragm assembly and connected to the second housing, and the outer periphery of the second diaphragm assembly is sandwiched between the second recessed edges and the second housing.

18. The sound-generating device as claimed in claim 13, characterized in that, The first housing has a first clearance portion, and the first diaphragm assembly has a second clearance portion corresponding to the first clearance portion, so that the first diaphragm assembly is formed as an asymmetrical structure; wherein, the first clearance portion and the second clearance portion are chamfered or concave arc-shaped curved surfaces; And / or, the second housing has a third clearance portion, and the second diaphragm assembly has a fourth clearance portion corresponding to the third clearance portion, so that the second diaphragm assembly is formed as an asymmetrical structure; wherein, the third clearance portion and the fourth clearance portion are chamfered or concave arc-shaped curved surfaces.

19. The sound-generating device as claimed in claim 13, characterized in that, The first vibration system further includes a first centering support, which includes a first outer fixing part, a first inner fixing part, and a first elastic arm part connecting the first outer fixing part and the first inner fixing part. The first outer fixing part is connected to the first outer shell, and the first inner fixing part is connected to the end of the first voice coil facing the first magnet. The second vibration system further includes a second centering support, which includes a second outer fixing part, a second inner fixing part, and a second spring arm part connecting the second outer fixing part and the second inner fixing part. The second outer fixing part is connected to the second outer shell, and the second inner fixing part is connected to one end of the second voice coil facing the fourth magnet.

20. The sound-generating device according to any one of claims 1 to 19, characterized in that, The distance between the end face of the first voice coil facing the first magnet and the first magnet is the same as the distance between the end face of the first voice coil facing the second magnet and the second magnet. And / or, the distance between the end face of the second voice coil facing the third magnet and the third magnet is the same as the distance between the end face of the second voice coil facing the fourth magnet and the fourth magnet.

21. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 20.

22. The electronic device as claimed in claim 21, characterized in that, The electronic device includes a device housing, and the sound-generating device is disposed within the device housing; a first cavity is formed between the first diaphragm assembly and the first magnetic part, a second cavity is formed between the first diaphragm assembly and the second magnetic part, a third cavity is formed between the second diaphragm assembly and the third magnetic part, and a fourth cavity is formed between the second diaphragm assembly and the fourth magnetic part; Wherein, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the second cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the first cavity and the fourth cavity; or, the first diaphragm assembly and the second diaphragm assembly radiate sound waves of the same phase to the outside through the first sound outlet channel after passing through the first cavity and the third cavity, and radiate sound waves of the same phase to the outside through the second sound outlet channel after passing through the second cavity and the fourth cavity. The first sound outlet channel includes a sound outlet provided on the device housing, and the second sound outlet channel includes a vent provided on the device housing.

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