Sound production device, sound production module and electronic equipment

Abstract

The utility model discloses a sounding device, a sounding module and an electronic device, and relates to the technical field of electro-acoustic transduction, the sounding device comprises a plurality of sounding monomers arranged side by side along a first direction, at least one sounding monomer is defined as a first sounding monomer, and at least one sounding monomer is defined as a second sounding monomer. A first vibration plate of the first sound production single body comprises a first plate part and a second plate part which are located on different horizontal planes, the top of the first voice coil is connected with the first plate part, and the periphery of the second plate part abuts against the inner circumferential wall of the first voice coil. The first central magnetic part of the first sound production single body comprises two central magnets which are located on the two opposite sides of the second plate part in the second direction, the sides, facing the first vibrating diaphragm assembly, of the two central magnets are both exposed in the inner cavity of the sound production device, the two central magnets are both magnetized in the second direction, and the magnetizing directions are opposite. The sounding device provided by the utility model not only can meet the space requirements of lightness, thinness and miniaturization, but also is provided with a multi-vibration system, so that the acoustic performance and the sound listening effect of the whole machine can be improved.

Description

Technical Field

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

[0002] In recent years, with the further development of science and technology, the field of smart electronics has also ushered in a period of rapid development. People have put forward more demands for the development of smart terminal electronic products, gradually forming new trends such as high performance, miniaturization, and thinness in electronic products. As the sound-producing unit of smart electronic products, the high performance, high sound quality, and thinness of speakers have gradually become the mainstream demands of consumers.

[0003] In related technologies, high-performance loudspeakers are typically bifacial, employing a shared magnetic circuit on both sides. This results in the voice coil and magnetic circuit being superimposed in the Z-axis, leading to a thicker and larger product. Limited by the internal space and slimming requirements of smart electronic devices, there is no longer sufficient internal space to improve loudspeaker performance. Therefore, there is an urgent need for a high-performance loudspeaker suitable for slim and lightweight electronic devices, one that meets the space requirements for miniaturization and lightness while also featuring a dual-vibration system to enhance loudspeaker performance. Utility Model Content

[0004] The main purpose of this utility model is to provide a sound-generating device, a sound-generating module, and an electronic device. The aim is to provide a sound-generating device with a multi-vibration system that can meet the space requirements of being lightweight and compact, while also having multiple vibration systems to improve the overall acoustic performance and listening effect of the device.

[0005] To achieve the above objectives, this utility model proposes a sound-generating device, which includes a plurality of sound-generating units arranged side by side along a first direction. Each sound-generating unit includes a magnetic circuit system and a vibration system. The magnetic circuit system is provided with a magnetic gap. The vibration system vibrates along a second direction perpendicular to the first direction. The vibration system includes a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is correspondingly arranged with respect to the magnetic gap.

[0006] Wherein, at least one of the sound-generating units is defined as a first sound-generating unit, the diaphragm assembly of the first sound-generating unit is a first diaphragm assembly, the first diaphragm assembly includes a first diaphragm and a first diaphragm plate, the inner periphery of the first diaphragm is connected to the first diaphragm plate, the first diaphragm plate includes a first plate portion and a second plate portion located on different horizontal planes, the voice coil of the first sound-generating unit is a first voice coil, the top of the first voice coil is connected to the first plate portion, the second plate portion is located inside the first voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the first voice coil, the magnetic circuit system of the first sound-generating unit is a first magnetic circuit system, the first magnetic circuit system has a first magnetic gap, the first magnetic circuit system includes a first central magnetic portion, the first central magnetic portion includes two central magnets that are opposite to each other and spaced apart along the second direction, the two central magnets are located on opposite sides of the second plate portion, the projection of the two central magnets along the second direction is located inside the first voice coil, and the side of the two central magnets facing the first diaphragm assembly is exposed in the internal cavity of the sound-generating device, and the two central magnets are magnetized along the second direction and in opposite directions.

[0007] In one embodiment, the first diaphragm further includes a third plate portion, which is located inside the first voice coil and is fitted and connected to the inner peripheral wall of the first voice coil. The two ends of the third plate portion along the second direction are respectively connected to the first plate portion and the second plate portion.

[0008] The first plate, the third plate, and the second plate are integrally formed structures.

[0009] In one embodiment, the vibration system of the first sound-generating unit is a first vibration system, which further includes a waterproof membrane. The waterproof membrane includes a first connecting portion located at the top of the first voice coil, a second connecting portion that is in contact with the inner peripheral wall of the first voice coil, and a third connecting portion located inside the first voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion.

[0010] In one embodiment, the first connecting portion is sandwiched between the first plate portion and the top of the first voice coil; or, the inner periphery of the first diaphragm is sandwiched between the first plate portion and the first connecting portion.

[0011] And / or, the second plate portion is located on the side of the third connecting portion facing the top of the first voice coil;

[0012] And / or, the first connecting part, the second connecting part and the third connecting part are integrally formed structures;

[0013] And / or, the extension length of the second connecting portion along the second direction is less than the extension length of the first voice coil along the second direction;

[0014] And / or, the first connecting portion and the third connecting portion are respectively connected to the two ends of the second connecting portion along the second direction.

[0015] In one embodiment, the outer periphery of the first plate portion is recessed and bent toward the first voice coil to form a stepped portion, and the inner periphery of the first diaphragm is supported and overlapped with the stepped portion;

[0016] And / or, along the second direction, the distances between the opposite sides of the second plate and the corresponding central magnets are the same.

[0017] In one embodiment, the first magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke disposed opposite to each other, and the two central magnets include a first central magnet and a second central magnet. The side of the first central magnet facing away from the first diaphragm assembly is connected to the first magnetic yoke, and the side of the second central magnet facing away from the first diaphragm assembly is connected to the second magnetic yoke.

[0018] In one embodiment, the first magnetic circuit system further includes a first side magnetic portion disposed on the second magnetic yoke. The first side magnetic portion is located outside the second central magnet and is spaced apart from the second central magnet to form the first magnetic gap. The first side magnetic portion includes a first side magnet and a first side magnetic plate stacked together, and the first side magnet is connected to the second magnetic yoke.

[0019] Wherein, the projection of the first side magnetic plate along the first direction is located between the top and bottom of the first voice coil; and / or, the projection of the first side magnetic plate along the first direction is located between the surfaces of the first center magnet and the second center magnet facing the first diaphragm assembly; and / or, the thickness of the first side magnet along the second direction is greater than the thickness of the second center magnet along the second direction.

[0020] In one embodiment, the second magnetic yoke includes a bottom and a side portion formed by bending and extending the periphery of the bottom toward the first diaphragm assembly, wherein the second central magnet is disposed on the bottom and spaced from the side portion to form the first magnetic gap.

[0021] In one embodiment, the outer periphery of the first magnetic yoke bends and extends toward the second magnetic yoke to form a first welded portion, and the first welded portion is welded to the outer periphery of the second magnetic yoke;

[0022] And / or, the outer periphery of the second magnetic yoke bends and extends toward the first magnetic yoke to form a second welded portion, and the second welded portion is welded to the outer periphery of the first magnetic yoke.

[0023] In one embodiment, each of the sound-generating units further includes a housing, and the magnetic circuit system and the vibration system of each of the sound-generating units are connected to the housing;

[0024] Wherein, the outer shell of the first sound-emitting unit is a first outer shell, the first outer shell is connected to the first magnetic yoke and the second magnetic yoke respectively, and is located between the first magnetic yoke and the second magnetic yoke, the first magnetic yoke includes at least a top plate portion located on the side of the first diaphragm assembly facing away from the second magnetic yoke, the first central magnet is disposed on the top plate portion, the outer periphery of the first diaphragm is connected to the end of the first outer shell away from the second magnetic yoke, and the first diaphragm is opposite to and spaced apart from the top plate portion.

[0025] In one embodiment, the first magnetic yoke further includes a side plate portion disposed at an angle to the top plate portion, the side plate portion being bent toward the side of the first diaphragm assembly to form a support platform, and the outer periphery of the first diaphragm being sandwiched between the first housing and the support platform;

[0026] And / or, the first outer shell is a plastic shell, and the first outer shell and the first magnetic yoke are integrally injection molded.

[0027] In one embodiment, the first magnetic circuit system further includes a first side magnetic portion disposed on the second magnetic yoke. The first side magnetic portion is located outside the second central magnet and is spaced apart from the second central magnet to form the first magnetic gap. The first side magnetic portion includes a first side magnet and a first side magnetic plate stacked together. The first side magnet is connected to the second magnetic yoke, and the first side magnetic plate is connected to the first outer shell.

[0028] The first side magnetic plate and the first outer shell are integrally formed.

[0029] In one embodiment, a first cavity is formed between the first magnetic yoke and the first diaphragm assembly, the first central magnet is located in the first cavity, and the first sound-generating unit is further provided with a sound outlet communicating with the first cavity;

[0030] The sound outlet is located in the first outer shell;

[0031] Alternatively, the first magnetic yoke includes a top plate portion and a side plate portion arranged at an angle, with the sound outlet located on the top plate portion and opposite to the first diaphragm; or, the sound outlet is located on the side plate portion.

[0032] Alternatively, the sound outlet may be located at the connection between the first outer shell and the first magnetic yoke.

[0033] In one embodiment, the two center magnets include a first center magnet and a second center magnet, the first center magnet being located near the top of the first voice coil and the second center magnet being located near the bottom of the first voice coil;

[0034] Wherein, the magnetic energy product of the first central magnet is greater than the magnetic energy product of the second central magnet; or, the volume of the first central magnet is greater than the volume of the second central magnet; or, the outer contours of the first central magnet and the second central magnet are the same, and the thickness of the first central magnet along the second direction is greater than the thickness of the second central magnet along the second direction.

[0035] In one embodiment, the plurality of sound-generating units of the sound-generating device are all the first sound-generating units, and each first magnetic circuit system includes a first magnetic yoke and a second magnetic yoke disposed opposite to each other, and two central magnets are respectively connected to the first magnetic yoke and the second magnetic yoke in a one-to-one correspondence; wherein, the plurality of first magnetic yokes are formed as a separate structure; or, the plurality of first magnetic yokes are formed as a one-piece molded structure; and / or, the plurality of second magnetic yokes are formed as a separate structure; or, the plurality of second magnetic yokes are formed as a one-piece molded structure;

[0036] And / or, each of the sound-generating units further includes a housing, and the magnetic circuit system and the vibration system of each of the sound-generating units are connected to the housing. The plurality of housings are integrally formed and arranged along the first direction.

[0037] And / or, the magnetic circuit system of each of the sound-generating units includes a central magnetic part and a side magnetic part disposed outside the central magnetic part, the side magnetic part being spaced apart from the central magnetic part to form the magnetic gap, the multiple central magnetic parts of the multiple sound-generating units being arranged at intervals along the first direction, and two adjacent central magnetic parts sharing one side magnetic part;

[0038] And / or, the diaphragm assembly of each of the said sound-generating units includes a diaphragm and a vibrating plate, the inner periphery of the diaphragm is connected to the vibrating plate, and the plurality of diaphragms are integrally formed structures and arranged along the first direction.

[0039] In one embodiment, the plurality of sound-generating units further includes a second sound-generating unit. The second sound-generating unit includes a second vibration system and a second magnetic circuit system. The second vibration system includes a second diaphragm and a second voice coil connected to the second diaphragm. The second diaphragm is located on one side of the second magnetic circuit system and is opposite to and spaced from the second magnetic circuit system. The second magnetic circuit system includes a magnetic yoke and a second central magnetic portion and a second side magnetic portion disposed on the magnetic yoke. The second side magnetic portion is disposed outside the second central magnetic portion and is spaced from the second central magnetic portion to form a second magnetic gap. The end of the second voice coil away from the second diaphragm is disposed corresponding to the second magnetic gap.

[0040] The second central magnetic part includes a third central magnet and a central magnetic plate stacked together, the third central magnet being connected to the magnetic yoke; the second side magnetic part includes a second side magnet and a second side magnetic plate stacked together, the second side magnet being connected to the magnetic yoke.

[0041] In one embodiment, the sound-generating device includes two sound-generating units arranged side by side along a first direction;

[0042] The two diaphragm assemblies together radiate sound waves outward from the same side of the sound-generating device;

[0043] And / or, both diaphragm assemblies simultaneously radiate sound waves of the same phase outward; or, both diaphragm assemblies simultaneously radiate sound waves of opposite phase outward.

[0044] This utility model also proposes a sound-generating module, the sound-generating module comprising:

[0045] Module housing, the module housing having a receiving cavity; and

[0046] The aforementioned sound-generating device is disposed within the receiving cavity, which divides the receiving cavity into a front cavity and a rear cavity;

[0047] The module housing is provided with a sound outlet that communicates with the front cavity.

[0048] In one embodiment, the sound outlet and the diaphragm assemblies of the plurality of sound-generating units of the sound-generating device are all arranged facing each other, so that the sound-generating module has a positive sound output structure;

[0049] Alternatively, the module housing may have multiple sound outlets; wherein the multiple sound outlets are all located on the same side of the module housing, and each sound outlet is directly opposite to the diaphragm assembly of each sound-emitting unit of the sound-emitting device, so that the sound-emitting module has a front-emitting structure; or, the multiple sound outlets are all located on the same side of the module housing, and each sound outlet is located on one side of the sound-emitting device, so that the sound-emitting module has a side-emitting structure; or, the multiple sound outlets are respectively located on different sides of the module housing, at least one sound outlet is directly opposite to the diaphragm assembly of at least one sound-emitting unit of the sound-emitting device, and at least one sound outlet is located on one side of the sound-emitting device.

[0050] This utility model also proposes an electronic device, which includes the sound-generating module described above;

[0051] Alternatively, the electronic device may include the sound-generating device described above.

[0052] The sound-generating device of this utility model comprises multiple sound-generating units arranged side-by-side along a first direction. Each sound-generating unit is configured as a magnetic circuit system and a vibration system. The magnetic circuit system includes a magnetic gap, and the vibration system comprises a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end corresponds to the magnetic gap. Current is passed through the multiple voice coils of the multiple sound-generating units, causing them to reciprocate within the magnetic field formed by the multiple magnetic circuit systems. This reciprocates the motion of the multiple diaphragm assemblies along a second direction perpendicular to the first direction, thereby pushing air to produce sound. Thus, the sound-generating device simultaneously possesses multiple vibration systems, improving the overall acoustic performance and listening effect, and reducing the thickness of the sound-generating device in the Z-direction, resulting in... The acoustic device can meet the space requirements of being lightweight, thin, and miniaturized. Simultaneously, at least one of multiple sound-generating units is designated as the first sound-generating unit, and the magnetic circuit system, vibration system, and voice coil of the first sound-generating unit are all defined as a first magnetic circuit system, a first magnetic circuit system, a first magnetic circuit system, a first magnetic circuit system, and a first magnetic circuit system. The first central magnet of the first magnetic circuit system is configured as two central magnets that are opposite to each other and spaced apart along a second direction. The inner periphery of the first diaphragm of the first magnetic circuit system is connected to a first vibrating plate. The first vibrating plate is configured as a first plate portion and a second plate portion located on different horizontal planes along the second direction. The top of the first voice coil is connected to the first plate portion, and the second plate portion is located on the first voice coil. The second plate is positioned on the inner side of the first voice coil, with its outer periphery abutting against the inner peripheral wall of the first voice coil. This positions the two central magnets on opposite sides of the second plate, with their projections along the second direction located inside the first voice coil. The sides of the two central magnets facing the first diaphragm assembly are exposed within the internal cavity of the sound-generating device. Both central magnets are magnetized along the second direction in opposite directions, thereby increasing the magnetic field strength in the area where the first voice coil is located. This increases the magnetic force on the first voice coil. Even when the first voice coil moves away from the first magnetic gap, the magnetic force on the first voice coil is still increased under the action of the two central magnets, thus increasing the volume, improving sound quality, and enhancing the acoustic performance of the first sound-generating unit, thereby improving the overall sound quality. The acoustic performance and listening effect of the sound device are improved. Furthermore, by utilizing the first plate portion and the second plate portion located on different horizontal planes along the second direction, and the projection of the two central magnets along the second direction located inside the first voice coil, the first voice coil and the second plate portion provide accommodating space for the two central magnets during the movement of the first diaphragm assembly. This allows the two central magnets to be closer to the first voice coil, resulting in a magnetic field enhancement effect. This effectively solves the problem of insufficient magnetic force affecting acoustic performance when the first voice coil moves away from the first magnetic gap during the reciprocating motion of the first voice coil. The two central magnets eliminate the conventional central washer structure, which not only enables a thinner design but also makes the magnetic field lines more uniformly distributed and the BLx curve flatter, thereby reducing distortion.Furthermore, given the same volume requirements, the absence of a central washer allows for a larger volume of the two central magnets, thereby increasing the product's black-and-white (BL) value. Attached Figure Description

[0053] 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.

[0054] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model;

[0055] Figure 2 A schematic diagram of the structure of an embodiment of the sound-generating device provided by this utility model from another perspective;

[0056] Figure 3 An exploded view of an embodiment of the sound-generating device provided by this utility model;

[0057] Figure 4 A cross-sectional schematic diagram of an embodiment of the sound-generating device provided by this utility model;

[0058] Figure 5 A cross-sectional schematic diagram from another perspective of an embodiment of the sound-generating device provided by this utility model;

[0059] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0060] Figure 7 A partially enlarged cross-sectional view of another embodiment of the sound-generating device provided by this utility model;

[0061] Figure 8 A partially enlarged cross-sectional view of another embodiment of the sound-generating device provided by this utility model;

[0062] Figure 9 A cross-sectional schematic diagram of another embodiment of the sound-generating device provided by this utility model;

[0063] Figure 10 An exploded view of the first vibrating plate and the waterproof membrane in one embodiment of the sound-generating device provided by this utility model;

[0064] Figure 11 An exploded view of the first vibrating plate and the waterproof membrane in another embodiment of the sound-generating device provided by this utility model;

[0065] Figure 12 A schematic diagram of the structure of the first vibrating plate in one embodiment of the sound-generating device provided by this utility model;

[0066] Figure 13 A cross-sectional schematic diagram of the first vibrating plate in one embodiment of the sound-generating device provided by this utility model;

[0067] Figure 14 A schematic diagram of the structure of the first magnetic yoke in the first embodiment of the sound-generating device provided by this utility model;

[0068] Figure 15 A schematic diagram of the structure of the first magnetic yoke in the second embodiment of the sound-generating device provided by this utility model;

[0069] Figure 16 A schematic diagram of the structure of the first magnetic yoke in the third embodiment of the sound-generating device provided by this utility model;

[0070] Figure 17 A schematic diagram of the structure of the first magnetic yoke in the fourth embodiment of the sound-generating device provided by this utility model;

[0071] Figure 18 A schematic diagram of the structure of the first magnetic yoke in the fifth embodiment of the sound-generating device provided by this utility model;

[0072] Figure 19 A schematic diagram of the structure of the first embodiment of the sound-generating module provided by this utility model;

[0073] Figure 20 A schematic diagram of the structure of the second embodiment of the sound-generating module provided by this utility model;

[0074] Figure 21 A cross-sectional schematic diagram of the second embodiment of the sound-generating module provided by this utility model;

[0075] Figure 22 This is a schematic diagram of the structure of the third embodiment of the sound-generating module provided by this utility model;

[0076] Figure 23 This is a schematic diagram of the fourth embodiment of the sound-generating module provided by this utility model;

[0077] Figure 24 A schematic diagram of the fifth embodiment of the sound-generating module provided by this utility model;

[0078] Figure 25 A cross-sectional schematic diagram of the fifth embodiment of the sound-generating module provided by this utility model;

[0079] Figure 26 A simulation effect diagram of an embodiment of the sound-generating device provided by this utility model.

[0080] Explanation of icon numbers:

[0081] 100. Sound-generating device; 101. First sound-generating unit; 1. First outer shell; 11. First cavity; 2. First vibration system; 21. First diaphragm assembly; 211. First diaphragm; 212. First diaphragm plate; 2121. First plate portion; 2122. Step portion; 2123. Second plate portion; 2124. Third plate portion; 2125. Receiving groove; 22. First voice coil; 23. Waterproof membrane; 231. First connecting portion; 232. Second connecting portion; 233. Third connecting portion; 3. First magnetic circuit system; 31, First magnetic yoke; 311, Top plate; 312, Side plate; 313, Support platform; 314, Sound outlet; 315, First welding part; 32, Second magnetic yoke; 33, First central magnetic part; 331, First central magnet; 332, Second central magnet; 34, First side magnetic part; 341, First side magnet; 342, First side magnetic guide plate; 35, First magnetic gap; 400, Module housing; 410, Sound outlet; 420, Rear cavity; 500, Sound generating module.

[0082] 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

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] Please refer to the reference. Figures 1 to 18 As shown, in this embodiment of the present invention, the sound-generating device 100 includes a plurality of sound-generating units arranged side by side along a first direction. Each sound-generating unit includes a magnetic circuit system and a vibration system. The magnetic circuit system is provided with a magnetic gap. The vibration system vibrates along a second direction perpendicular to the first direction. The vibration system includes a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is correspondingly arranged with the magnetic gap. At least one sound-generating unit is defined as a first sound-generating unit 101. The diaphragm assembly of the first sound-generating unit 101 is defined as a first diaphragm assembly 21. The first diaphragm assembly 21 includes a first diaphragm 211 and a first vibrating plate 212. The inner periphery of the first diaphragm 211 is connected to the first vibrating plate 212. The first vibrating plate 212 includes a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes. The first sound-generating unit 101... The voice coil is a first voice coil 22. The top of the first voice coil 22 is connected to the first plate portion 2121. The second plate portion 2123 is located inside the first voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the first voice coil 22. The magnetic circuit system of the first sound-generating unit 101 is a first magnetic circuit system 3. The first magnetic circuit system 3 has a first magnetic gap 35. The first magnetic circuit system 3 includes a first central magnetic part 33. The first central magnetic part 33 includes two central magnets that are arranged opposite to each other and spaced apart along the second direction. The two central magnets are located on opposite sides of the second plate portion 2123. The projection of the two central magnets along the second direction is located inside the first voice coil 22, and the side of the two central magnets facing the first diaphragm assembly 21 is exposed in the internal cavity of the sound-generating device 100. The two central magnets are magnetized along the second direction and the magnetization directions are opposite.

[0089] In this embodiment, the sound-generating device 100 can be a sound-generating component of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It is understood that the multiple sound-generating units of the sound-generating device 100 are arranged side by side along the first direction. The multiple sound-generating units of the sound-generating device 100 can be connected and fixed by a housing, bracket or frame, or the multiple sound-generating units of the sound-generating device 100 can be installed as separate structures in a module housing along the first direction. There is no limitation on this.

[0090] Understandably, each of the multiple sound-generating units in the sound-generating device 100 can be a single structure of a sound-generating device, and this is not limited here. Each of the multiple sound-generating units includes a magnetic circuit system and a vibration system. The voice coil of each vibration system corresponds to the magnetic gap of each magnetic circuit system. When current is passed through each voice coil, each voice coil reciprocates in the magnetic field formed by each magnetic circuit system, driving each diaphragm assembly to vibrate along the second direction, thereby pushing the air to produce sound. That is, multiple diaphragm assemblies of multiple sound-generating units vibrate along the second direction, so that the sound-generating device 100 has multiple vibration systems at the same time, improving the acoustic performance and listening effect of the whole device. Furthermore, arranging multiple sound-generating units side by side along the first direction to form multiple vibration systems side by side along the first direction effectively reduces the thickness of the sound-generating device 100 in the Z direction, allowing the sound-generating device 100 to meet the space requirements of being thinner and smaller.

[0091] In this embodiment, at least one of the multiple sound-generating units of the sound-generating device 100 is designated as the first sound-generating unit 101. The magnetic circuit system of the first sound-generating unit 101 is a first magnetic circuit system 3, the vibration system of the first sound-generating unit 101 is a first vibration system 2, the diaphragm assembly of the first sound-generating unit 101 is a first diaphragm assembly 21, and the voice coil of the first sound-generating unit 101 is a first voice coil 22. It is understood that the first magnetic circuit system 3 and the first vibration system 2 of the first sound-generating unit 101 are arranged opposite to each other.

[0092] It is understood that the first magnetic circuit system 3 and the first vibration system 2 of the first sound-generating unit 101 can be mounted and fixed through the first housing 1, that is, the first magnetic circuit system 3 and the first vibration system 2 are fixed to the first housing 1, so that the first sound-generating unit 101 is an independent component, which is not limited here. Of course, in other embodiments, the outer periphery of the first diaphragm 211 in the first vibration system 2 can be directly fixed to the first magnetic circuit system 3; or, the first magnetic circuit system 3 and the first vibration system 2 of the first sound-generating unit 101 can be a separate structure, which is not limited here.

[0093] Optionally, the outer contour of the first sound-generating unit 101 can be circular or square, so that the outer contours of the first outer shell 1, the first magnetic circuit system 3, and the first vibration system 2 are correspondingly set to circular or square, depending on actual needs, and are not limited here. In this embodiment, the first outer shell 1 can be a frame or frame structure, that is, the first outer shell 1 has a cavity with openings at both ends. The first magnetic circuit system 3 is connected to the outer shell 1, and the first vibration system 2 is connected to the first outer shell 1 and is opposite to and spaced from the first magnetic circuit system 3. The first outer shell 1 can be a steel sheet structure or a plastic structure, and is not limited here.

[0094] Optionally, the first outer casing 1 can be a single integral structure or formed by the combination of multiple separate structures; no limitation is made here. Understandably, the first outer casing 1 is provided with conductive terminals, and the first voice coil 22 is electrically connected to the conductive terminals. This facilitates the connection and conduction of the first sound-generating unit 101 with the first voice coil 22 to the external circuit via the conductive terminals.

[0095] In this embodiment, the first magnetic circuit system 3 of the first sound-generating unit 101 has a first magnetic gap 35. The first magnetic circuit system 3 includes a first central magnetic part 33. By setting the first central magnetic part 33 as two central magnets that are opposite to each other and spaced apart along a second direction, the two central magnets are located on opposite sides of the second plate part 2123. Specifically, the two central magnets include a first central magnet 331 and a second central magnet 332. The first central magnet 331 is close to the top of the first voice coil 22, and the second central magnet 332 is close to the bottom of the first voice coil 22. It should be noted that the top of the first voice coil 22 is the end where the first voice coil 22 is connected to the first plate part 2121, and the bottom of the first voice coil 22 is the end where the first voice coil 22 is suspended in the first magnetic gap 35.

[0096] Understandably, the first sound-generating unit 101 has a first central magnet 331 and a second central magnet 332 positioned on opposite sides of the second plate portion 2123, with the projections of the first central magnet 331 and the second central magnet 332 along the second direction located inside the first voice coil 22. Thus, when the first voice coil 22 drives the first diaphragm assembly 21 to vibrate, the second plate portion 2123 vibrates between the first central magnet 331 and the second central magnet 332. At this time, the first voice coil 22 and the second plate portion 2123 cooperate to accommodate the first central magnet 331 and the second central magnet 332, and cause the first voice coil 2123 to vibrate between the first central magnet 331 and the second central magnet 332. 2. When the first voice coil 22 is close to the first central magnet 331, it is subjected to the magnetic field of the first central magnet 331. When the first voice coil 22 is close to the second central magnet 332, it is subjected to the magnetic field of the second central magnet 332. This can increase the magnetic field strength in the area where the first voice coil 22 is located, thereby increasing the magnetic force on the first voice coil 22. Even when the first voice coil 22 moves to the side away from the first magnetic gap 35, the magnetic force on the first voice coil 22 will be increased under the action of the first central magnet 331 and the second central magnet 332, thereby increasing the volume, improving the sound quality, and improving the acoustic performance of the first sound unit 101.

[0097] Meanwhile, the first sound-generating unit 101 is configured by setting the first central magnetic part 33 of the first magnetic circuit system 3 as a first central magnet 331 and a second central magnet 332, such that the side of the first central magnet 331 and the second central magnet 332 facing the first diaphragm assembly 21 are both exposed in the internal cavity of the first sound-generating unit 101. The first central magnet 331 and the second central magnet 332 are both magnetized along the second direction and in opposite directions. With this configuration, compared with the magnetic circuit structure of a conventional loudspeaker, the first central magnetic part 33 of this utility model eliminates the central magnet. The structure of the first sound-generating unit 101 (or central magnetic plate) reduces the thickness in the Z direction. Furthermore, the first central magnet 331 and the second central magnet 332 are opposite in magnetization direction along the second direction, forming a magnetically opposed structure. The magnetic lines of force generated by the first central magnet 331 and the second central magnet 332 repel each other and are transmitted to the outside of the first voice coil 22, resulting in a more uniform distribution of magnetic lines of force. When the first voice coil 22 reciprocates along the second direction, it can always be in a dense magnetic field region, thus making the BLx curve flatter and reducing distortion. Figure 26 As shown; and, under the premise that the thickness of the sound-generating device is certain, the first central magnetic part 33 of this utility model eliminates the central washer (or central magnetic plate) structure, so that the first central magnet 331 and the second central magnet 332 can effectively increase the volume of the first central magnetic part 33 and improve the BL value.

[0098] Optionally, the first voice coil 22 is an annular voice coil extending along the second direction. Thus, the first diaphragm 212 is configured as a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes along the second direction, such that the top of the first voice coil 22 is connected to the first plate portion 2121, that is, the first plate portion 2121 is used to fix the first voice coil 22, and the second plate portion 2123 is located inside the first voice coil 22, and the outer periphery of the second plate portion 2123 is abutted against the inner peripheral wall of the first voice coil 22. The first plate portion 2121 and the second plate portion 2123 on different horizontal planes can be used to achieve a centering effect on the vibration of the first voice coil 22. At the same time, during the vibration of the first voice coil 22, the first voice coil 22 and the second plate portion 2123 cooperate to provide a accommodating space for the first central magnet 331, ensuring the normal operation of the first sound-generating unit 101.

[0099] The sound-generating device 100 of this invention comprises multiple sound-generating units arranged side-by-side along a first direction. Each sound-generating unit is configured as a magnetic circuit system and a vibration system. The magnetic circuit system includes a magnetic gap, and the vibration system comprises a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end is positioned corresponding to the magnetic gap. Current is passed through the multiple voice coils of the multiple sound-generating units, causing the multiple voice coils to reciprocate within the magnetic field formed by the multiple magnetic circuit systems. This reciprocates the motion of the multiple diaphragm assemblies along a second direction perpendicular to the first direction, thereby pushing air to produce sound. Thus, the sound-generating device 100 simultaneously possesses multiple vibration systems. This system improves the overall acoustic performance and listening effect of the device, and reduces the thickness of the sound-generating device 100 in the Z direction, allowing the sound-generating device 100 to meet the space requirements of being thinner and smaller. Simultaneously, at least one of the multiple sound-generating units is designated as the first sound-generating unit 101, and the magnetic circuit system of the first sound-generating unit 101 is the first magnetic circuit system 3, the vibration system of the first sound-generating unit 101 is the first vibration system 2, the diaphragm assembly of the first sound-generating unit 101 is the first diaphragm assembly 21, and the voice coil of the first sound-generating unit 101 is the first voice coil 22. The first central magnet 33 of the first magnetic circuit system 3 is configured to be phased along the second direction. Two central magnets are spaced apart, and the inner periphery of the first diaphragm 211 of the first diaphragm assembly 21 is connected to the first resonant plate 212. The first resonant plate 212 is configured as a first plate portion 2121 and a second plate portion 2123 located on different horizontal planes along a second direction, such that the top of the first voice coil 22 is connected to the first plate portion 2121, the second plate portion 2123 is located inside the first voice coil 22, and the outer periphery of the second plate portion 2123 abuts against the inner peripheral wall of the first voice coil 22. In this way, the two central magnets are located on opposite sides of the second plate portion 2123, and the projection of the two central magnets along the second direction is located on the first voice coil 22. Inside, the sides of the two central magnets facing the first diaphragm assembly 21 are exposed in the internal cavity of the sound-generating device 100. Both central magnets are magnetized in opposite directions along the second direction, thereby increasing the magnetic field strength in the area where the first voice coil 22 is located and improving the flatness of the BLx curve. Even when the first voice coil 22 moves to the side away from the first magnetic gap 35, the magnetic force on the first voice coil 22 will be increased under the action of the two central magnets, thereby increasing the volume, improving the sound quality, and improving the acoustic performance of the first sound-generating unit 101, thus improving the acoustic performance and listening effect of the sound-generating device 101.Furthermore, by utilizing the first plate portion 2121 and the second plate portion 2123 located on different horizontal planes along the second direction of the first diaphragm assembly 212, and with the projections of the two central magnets along the second direction located inside the first voice coil 22, the cooperation of the first voice coil 22 and the second plate portion 2123 provides accommodating space for the two central magnets during the movement of the first diaphragm assembly 21. This allows the two central magnets to be closer to the first voice coil 22, resulting in a magnetic field enhancement effect. This effectively solves the problem of insufficient magnetic force affecting acoustic performance when the first voice coil 22 moves away from the first magnetic gap 35 during its reciprocating motion. The elimination of the conventional center washer structure in the two central magnets not only enables a thinner design, resulting in a more uniform distribution of magnetic lines of force and a flatter BLx curve, thereby reducing distortion, but also allows for a larger volume of the two central magnets under the same volume requirements, thus improving the BL value of the product.

[0100] In one embodiment, the first diaphragm 212 further includes a third plate portion 2124, which is located inside the first voice coil 22 and is attached to the inner peripheral wall of the first voice coil 22. The two ends of the third plate portion 2124 along the second direction are respectively connected to the first plate portion 2121 and the second plate portion 2123; wherein the first plate portion 2121, the third plate portion 2124 and the second plate portion 2123 are integrally formed structures.

[0101] In this embodiment, as Figure 8 , Figure 12 , Figure 13 As shown, the first sound-generating unit 101 has a one-piece molded structure for the first vibrating plate 212, that is, the first plate portion 2121, the third plate portion 2124, and the second plate portion 2123 of the first vibrating plate 212 are one-piece molded structures. This can improve both the structural strength of the first vibrating plate 212 and the sealing performance. Optionally, the first plate portion 2121, the third plate portion 2124, and the second plate portion 2123 of the first vibrating plate 212 can be integrally stamped.

[0102] Understandably, the third plate portion 2124 extends along the second direction and is located inside the first voice coil 22, and is in close contact with the inner peripheral wall of the first voice coil 22. This allows the first plate portion 2121 and the second plate portion 2123 of the first diaphragm 212 to be connected to both ends of the third plate portion 2124 along the second direction. This not only achieves the connection and fixation of the first plate portion 2121 and the second plate portion 2123, but also further improves the connection stability and strength between the first diaphragm 212 and the first voice coil 22 by utilizing the first plate portion 2121 and the third plate portion 2124.

[0103] In this embodiment, the third plate portion 2124 and the second plate portion 2123 of the first vibrating plate 212 are optionally arranged perpendicularly, such that the third plate portion 2124 and the second plate portion 2123 surround to form a receiving groove 2125. The first plate portion 2121 extends in a direction away from the receiving groove 2125, and a central magnet corresponds to the receiving groove 2125, that is, the first central magnet 331 corresponds to the receiving groove 2125. Thus, when the first voice coil 22 moves along the second direction and approaches the first central magnet 331, the receiving groove 2125 provides a receiving space for the first central magnet 331.

[0104] Understandably, in order to avoid the second plate portion 2123 colliding and interfering with the two central magnets (i.e., the first central magnet 331 and the second central magnet 332) during the vibration of the first voice coil 22, the extension length of the third plate portion 2124 along the second direction is optionally less than the extension length of the first voice coil 22 along the second direction.

[0105] In one embodiment, the vibration system of the first sound-generating unit 101 is a first vibration system 2. The first vibration system 2 further includes a waterproof membrane 23. The waterproof membrane 23 includes a first connecting portion 231 located at the top of the first voice coil 22, a second connecting portion 232 that is in close contact with the inner peripheral wall of the first voice coil 22, and a third connecting portion 233 located inside the first voice coil 22. A first plate portion 2121 is connected to the first connecting portion 231, and a second plate portion 2123 is connected to the third connecting portion 233.

[0106] In this embodiment, as Figures 3 to 7 , Figure 10 , Figure 11 As shown, the first sound-generating unit 101 is configured with a split structure for the first diaphragm 212 and a waterproof membrane 23. The waterproof membrane 23 is configured with a first connecting part 231, a second connecting part 232, and a third connecting part 233. The second connecting part 232 of the waterproof membrane 23 is attached to the inner peripheral wall of the first voice coil 22. The first connecting part 231 is connected to the first plate 2121, and the third connecting part 233 is connected to the second plate 2123. This not only achieves the connection and fixation of the first plate 2121 and the second plate 2123, but also uses the waterproof membrane 23 in conjunction with the first diaphragm 212 to further improve the connection stability and strength between the first diaphragm 212 and the first voice coil 22, thereby enhancing the waterproof sealing effect.

[0107] Optionally, the first connecting portion 231, the second connecting portion 232, and the third connecting portion 233 of the waterproof membrane 23 are integrally formed. Understandably, this can improve both the structural strength of the waterproof membrane 23 and its waterproof sealing performance.

[0108] In this embodiment, the second connecting portion 232 and the third connecting portion 233 of the waterproof membrane 23 are optionally arranged vertically, such that the second connecting portion 232 and the third connecting portion 233 surround and form a receiving groove 2125. The first connecting portion 231 extends in a direction away from the receiving groove 2125, and a central magnet corresponds to the receiving groove 2125, that is, the first central magnet 331 corresponds to the receiving groove 2125. Thus, when the first voice coil 22 moves along the second direction and approaches the first central magnet 331, the receiving groove 2125 provides a receiving space for the first central magnet 331. Optionally, the first connecting portion 231 and the third connecting portion 233 are respectively connected to the two ends of the second connecting portion 232 along the second direction.

[0109] Understandably, in order to avoid the second plate portion 2123 colliding and interfering with the two central magnets (i.e., the first central magnet 331 and the second central magnet 332) when the first voice coil 22 vibrates, optionally, the extension length of the second connecting portion 232 of the waterproof membrane 23 along the second direction is less than the extension length of the first voice coil 22 along the second direction.

[0110] In this embodiment, the top of the first voice coil 22 can be fixed to the first plate portion 2121 or the first connecting portion 231 of the waterproof membrane 23. That is, the top of the first voice coil 22 is connected to the first plate portion 2121, and the first connecting portion 231 is connected to the side of the first plate portion 2121 facing away from the first voice coil 22. In other words, the first plate portion 2121 is sandwiched between the top of the first voice coil 22 and the first connecting portion 231. Alternatively, the top of the first voice coil 22 is connected to the first connecting portion 231, and the first plate portion 2121 is connected to the side of the first connecting portion 231 facing away from the first voice coil 22. That is, the first connecting portion 231 is sandwiched between the first plate portion 2121 and the top of the first voice coil 22. This is not limited here.

[0111] Of course, in other embodiments, the inner periphery of the first diaphragm 211 may be connected to the first plate portion 2121 or the first connecting portion 231 of the waterproof membrane 23. When the first plate portion 2121 is sandwiched between the top of the first voice coil 22 and the first connecting portion 231, the inner periphery of the first diaphragm 211 is connected to the side of the first connecting portion 231 facing away from the first plate portion 2121; or, when the first connecting portion 231 is sandwiched between the first plate portion 2121 and the top of the first voice coil 22, the inner periphery of the first diaphragm 211 is connected to the side of the first plate portion 2121 facing away from the first connecting portion 231; or, the inner periphery of the first diaphragm 211 is sandwiched between the first plate portion 2121 and the first connecting portion 231, which is not limited here.

[0112] Understandably, the second plate portion 2123 is connected to the third connecting portion 233 and located on either side of the third connecting portion 233, which can structurally reinforce the waterproof membrane 23. Optionally, the second plate portion 2123 is located on the side of the third connecting portion 233 facing the top of the first voice coil 22, that is, the second plate portion 2123 is located on the side of the third connecting portion 233 facing the top of the first voice coil 22.

[0113] It should be noted that the accommodating groove 2125 not only provides accommodating space for the first central magnet 331, but also prevents vibration from propagating along the surface of the first diaphragm 211, thereby improving the acoustic performance of the first sound-generating unit 101.

[0114] In one implementation, such as Figure 7 , Figure 8 , Figures 11 to 13 As shown, the outer periphery of the first plate portion 2121 is recessed and bent toward the first voice coil 22 to form a stepped portion 2122, and the inner periphery of the first diaphragm 211 is supported and overlapped with the stepped portion 2122.

[0115] In this embodiment, a step portion 2122 is formed by concave bending of the outer periphery of the first plate portion 2121. This step portion 2122 is used to fix the inner periphery of the first diaphragm 211 and to position and limit the inner periphery of the first diaphragm 211. Simultaneously, when the inner periphery of the first diaphragm 211 is supported and overlapped with the step portion 2122, the inner periphery of the first diaphragm 211 can optionally be flush with the first plate portion 2121. This makes the mating structure of the first plate portion 2121 and the first diaphragm 211 more compact, reducing the occupied vibration space.

[0116] Understandably, the stepped portion 2122 is formed by the outer periphery of the first plate portion 2121 being recessed and bent toward the first voice coil 22, so that the stepped portion 2122 and the inner periphery of the first plate portion 2121 form a limiting groove, and cooperate with the third plate portion 2124 or the second connecting portion 232 to limit the installation of the top of the first voice coil 22, thereby further improving the connection stability of the first voice coil 22.

[0117] In one embodiment, along the second direction, the distances between the opposite sides of the second plate portion 2123 and the corresponding central magnets are the same.

[0118] In this embodiment, as Figures 4 to 9As shown, the second plate portion 2123 has a first surface facing the first central magnet 331 and a second surface facing the second central magnet 332. Optionally, the distance from the first surface to the first central magnet 331 is the same as the distance from the second surface to the second central magnet 332. This ensures that when the first voice coil 22 drives the second plate portion 2123 to vibrate in the second direction, collision interference between the second plate portion 2123 and the first and second central magnets 331 and 332 can be effectively avoided. Optionally, the projection of the second plate portion 2123 along the first direction is located at the center of the first voice coil 22.

[0119] In one embodiment, the first magnetic circuit system 3 further includes a first magnetic yoke 31 and a second magnetic yoke 32 disposed opposite to each other, and the two central magnets include a first central magnet 331 and a second central magnet 332. The side of the first central magnet 331 facing away from the first diaphragm assembly 21 is connected to the first magnetic yoke 31, and the side of the second central magnet 332 facing away from the first diaphragm assembly 21 is connected to the second magnetic yoke 32.

[0120] In this embodiment, as Figures 1 to 9 , Figures 14 to 18 As shown, by setting the first magnetic yoke 31 and the second magnetic yoke 32 so that the first magnetic yoke 31 and the second magnetic yoke 32 are arranged opposite to each other, the first magnetic yoke 31 and the second magnetic yoke 32 can be used to install and fix the two central magnets respectively, and at the same time, the magnetic lines of force of the two central magnets can be concentrated to form a magnetic circuit.

[0121] Understandably, the side of the first central magnet 331 facing away from the first diaphragm assembly 21 is connected to the first magnetic yoke 31, and the side of the second central magnet 332 facing away from the first diaphragm assembly 21 is connected to the second magnetic yoke 32. Optionally, the projected area of ​​the first magnetic yoke 31 along the second direction is greater than or equal to the projected area of ​​the first central magnet 331 along the second direction, and the projected area of ​​the second magnetic yoke 32 along the second direction is greater than or equal to the projected area of ​​the second central magnet 332 along the second direction. This not only achieves the installation and fixation of the first central magnet 331 and the second central magnet 332, but also achieves a magnetic focusing effect. In this embodiment, the first magnetic yoke 31 and the second magnetic yoke 32 can be selected as a magnetic conductive plate structure.

[0122] In one embodiment, the first magnetic yoke 31 has a first recessed groove corresponding to the first central magnet 331, and the first central magnet 331 is disposed in the first recessed groove. It is understood that this arrangement allows for the positioning and installation of the first central magnet 331 using the first recessed groove, improving installation stability. Furthermore, it reduces the assembly height between the first central magnet 331 and the first magnetic yoke 31, increasing the vibration space of the first diaphragm assembly 21.

[0123] In this embodiment, the first recessed groove can be formed by the recess of the first magnetic yoke 31 facing the first central magnet 331, in which case the first magnetic yoke 31 is planar facing away from the first central magnet 331; or, the first recessed groove can be formed by bending the first magnetic yoke 31 toward the side away from the first central magnet 331, in which case the side of the first magnetic yoke 31 facing away from the first central magnet 331 is raised corresponding to the position of the first recessed groove, which is not limited here.

[0124] In one embodiment, the second magnetic yoke 32 has a second recessed groove corresponding to the second central magnet 332, and the second central magnet 332 is disposed within the second recessed groove. It is understood that this arrangement allows for the positioning and installation of the second central magnet 332 using the second recessed groove, improving installation stability. Furthermore, it reduces the assembly height between the first central magnet 331 and the first magnetic yoke 31, increasing the vibration space of the first diaphragm assembly 21.

[0125] In this embodiment, the second recessed groove can be formed by the second magnetic yoke 32 being recessed on the side facing the second central magnet 332, in which case the second magnetic yoke 32 is planar on the side away from the second central magnet 332; or, the second recessed groove can be formed by bending the second magnetic yoke 32 toward the side away from the second central magnet 332, in which case the side of the second magnetic yoke 32 away from the second central magnet 332 is raised at the position corresponding to the second recessed groove, which is not limited here.

[0126] In one embodiment, the first magnetic circuit system 3 further includes a first side magnetic portion 34 disposed on the second magnetic yoke 32. The first side magnetic portion 34 is located outside the second central magnet 332 and is spaced apart from the second central magnet 332 to form a first magnetic gap 35.

[0127] In this embodiment, as Figures 3 to 9 As shown, by placing the first side magnetic part 34 on the second magnetic yoke 32 and located outside the second central magnet 332, the first side magnetic part 34 and the second central magnet 332 are spaced apart to form a first magnetic gap 35, which can effectively ensure the magnetic field strength in the first magnetic gap 35.

[0128] Understandably, the first side magnetic part 34 not only forms a magnetic circuit with the second central magnet 332 through the second magnetic yoke 32, allowing the magnetic lines of force in the first magnetic gap 35 to pass through the first voice coil 22, but also forms a magnetic circuit with the first central magnet 331 and the first magnetic yoke 31, so that when the first voice coil 22 is close to the first central magnet 331, more magnetic lines of force pass through the first voice coil 22, thereby increasing the magnetic force on the first voice coil 22, effectively increasing the BL value, making the magnetic lines of force distribution more uniform, and the BLx curve flatter, thereby reducing distortion.

[0129] It should be noted that the first side magnetic part 34 can be a single integrated structure, for example, the first side magnetic part 34 can be arranged in a ring and surround the outside of the second central magnet 332. Of course, the first side magnetic part 34 can also be a separate structure, in which case there are multiple first side magnetic parts 34, which are spaced apart and surround the outside of the second central magnet 332, and this is not limited here.

[0130] In this embodiment, as Figures 3 to 9 As shown, the first side magnetic part 34 includes a first side magnet 341 and a first side magnetic guide plate 342 stacked together, and the first side magnet 341 is connected to the second magnetic yoke 32. It can be understood that the first side magnet 341 and the first side magnetic guide plate 342 are both located outside the second central magnet 332 and are spaced apart from the second central magnet 332 to form a first magnetic gap 35.

[0131] Optionally, the first side magnet 341 and the first side magnetic plate 342 of the first side magnetic part 34 have similar structural outlines. That is, when the first side magnetic part 34 is an integral ring structure, both the first side magnet 341 and the first side magnetic plate 342 are integral ring structures. Alternatively, when the first side magnetic part 34 is a split structure, both the first side magnet 341 and the first side magnetic plate 342 are split structures, and they correspond one-to-one. Of course, in other embodiments, the structures of the first side magnet 341 and the first side magnetic plate 342 of the first side magnetic part 34 can also be different. For example, one of the first side magnet 341 and the first side magnetic plate 342 may be an integral ring, and the other may be a split structure. This is not limited here.

[0132] In one embodiment, the projection of the first side magnetic plate 342 along the first direction is located between the top and bottom of the first voice coil 22.

[0133] In this embodiment, when the first sound-generating unit 101 is not working, that is, when the first voice coil 22 is not vibrating, the projection of the first side magnetic plate 342 along the first direction is located between the top and bottom of the first voice coil 22. This ensures that the first voice coil 22 can repeatedly approach the first central magnet 331 or the second central magnet 332 during vibration, thereby ensuring that the magnetic force experienced by the first voice coil 22 remains unchanged or changes very little when it moves to the side away from the first magnetic gap 35, and making the magnetic field lines of the first magnetic circuit system 3 more uniformly distributed and the BLx curve flatter, thereby reducing distortion.

[0134] It should be noted that, under small amplitude conditions, the projection of the first side magnetic plate 342 along the first direction is located between the top and bottom of the first voice coil 22. However, under small amplitude conditions, the projection of the first side magnetic plate 342 along the first direction is located between the top and bottom of the first voice coil 22 only when the first voice coil 22 is not vibrating; this is not a limitation.

[0135] In one embodiment, the projection of the first side magnetic plate 342 along the first direction is located between the surfaces of the first central magnet 331 and the second central magnet 332 facing the first diaphragm assembly 21.

[0136] In this embodiment, as Figure 4 , Figure 5 , Figure 9 As shown, by placing the projection of the first side magnetic plate 342 of the first side magnetic part 34 along the first direction between the surfaces of the first center magnet 331 and the second center magnet 332 facing the first diaphragm assembly 21, it is ensured that the first side magnetic part 34 can form a magnetic circuit with the first center magnet 331 and the second center magnet 332 respectively, so that more magnetic lines of force pass through the first voice coil 22, thereby increasing the magnetic field strength, effectively improving the BL value, making the magnetic lines of force distribution more uniform, and the BLx curve flatter, thereby reducing distortion.

[0137] Optionally, the thickness of the first side magnet 341 along the second direction is greater than the thickness of the second center magnet 332 along the second direction. In this embodiment, by setting the thickness of the first side magnet 341 along the second direction to be greater than the thickness of the second center magnet 332 along the second direction, it is ensured that the projection of the first side magnetic plate 342 along the first direction is located between the surfaces of the first center magnet 331 and the second center magnet 332 facing the first diaphragm assembly 21. At the same time, it should be noted that the first side magnet 341 needs to cooperate with the first center magnet 331 and the second center magnet 332 to form corresponding magnetic circuits. The above setting can also ensure that the first side magnet 341 forms magnetic circuits with equivalent magnetic field strength with the first center magnet 331 and the second center magnet 332.

[0138] In another embodiment, the second magnetic yoke 32 includes a bottom and a side portion (not shown) formed by bending and extending from the periphery of the bottom toward the first diaphragm assembly 21. The second central magnet 332 is disposed at the bottom and spaced from the side portion to form a first magnetic gap 35.

[0139] In this embodiment, the second magnetic yoke 32 is configured with its bottom and sides arranged at an angle, such that the sides of the second magnetic yoke 32 are located outside the second central magnet 332 and spaced apart from the second central magnet 332 to form a first magnetic gap 35. It is understood that the bottom and sides of the second magnetic yoke 32 may be an integrally formed structure. The bottom and sides are arranged perpendicularly, which is not limited here.

[0140] In one implementation, such as Figures 1 to 6 , Figure 9 , Figures 14 to 18As shown, the outer periphery of the first magnetic yoke 31 bends and extends toward the second magnetic yoke 32 to form a first welding portion 315, which is welded to the outer periphery of the second magnetic yoke 32. It can be understood that by welding the first welding portion 315 of the first magnetic yoke 31 to the second magnetic yoke 32, the connection stability is improved. Thus, when the first sound-generating unit 101 is applied to an electronic device, the structural stability of the first sound-generating unit 101 can be ensured in the event of a drop or other impact.

[0141] Optionally, the first welding part 315 includes a plurality of first welding parts 315, which are spaced apart on the outer periphery of the first magnetic yoke 31, and the plurality of first welding parts 315 are welded to the outer periphery of the second magnetic yoke 32, which is not limited here.

[0142] In this embodiment, as Figures 1 to 6 , Figure 9 , Figures 14 to 18 As shown, the first magnetic yoke 31 includes a top plate portion 311 and a side plate portion 312 arranged at an angle, and a portion of the side plate portion 312 extends toward the second magnetic yoke 32 to form a first welded portion 315. Optionally, the top plate portion 311, the side plate portion 312 and the first welded portion 315 of the first magnetic yoke 31 are integrally formed structures, which is not limited here.

[0143] In one embodiment, the outer periphery of the second magnetic yoke 32 bends and extends toward the first magnetic yoke 31 to form a second welding portion, which is welded to the outer periphery of the first magnetic yoke 31. It is understood that by welding the second welding portion of the second magnetic yoke 32 to the first magnetic yoke 31, the connection stability is improved. Thus, when the first sound-generating unit 101 is applied to an electronic device, the structural stability of the first sound-generating unit 101 can be ensured in the event of a drop or other event.

[0144] Optionally, the second welding part includes multiple parts, which are spaced apart on the outer periphery of the second magnetic yoke 32. All of the multiple second welding parts are welded to the outer periphery of the first magnetic yoke 31, which is not limited here.

[0145] In this embodiment, the second magnetic yoke 32 includes a top wall and a side wall arranged at an angle, with a portion of the side wall extending toward the first magnetic yoke 31 to form a second welded portion. Optionally, the top wall, side wall, and second welded portion of the second magnetic yoke 32 are integrally formed structures, which is not limited here.

[0146] In one embodiment, each sound-generating unit further includes a housing, and the magnetic circuit system and vibration system of each sound-generating unit are connected to the housing; wherein, the housing of the first sound-generating unit 101 is a first housing 1, the first housing 1 is connected to the first magnetic yoke 31 and the second magnetic yoke 32 respectively, and is located between the first magnetic yoke 31 and the second magnetic yoke 32, the first magnetic yoke 31 includes at least a top plate portion 311 located on the side of the first diaphragm assembly 21 facing away from the second magnetic yoke 32, the first central magnet 331 is disposed on the top plate portion 311, the outer periphery of the first diaphragm 211 is connected to the end of the first housing 1 away from the second magnetic yoke 32, and the first diaphragm 211 is opposite to and spaced from the top plate portion 311.

[0147] In this embodiment, the magnetic circuit system and vibration system of each sound-generating unit of the sound-generating device 100 are connected to the outer casing. It can be understood that the multiple outer casings of multiple sound-generating units can be separately configured, that is, the outer casing of each sound-generating unit is independent.

[0148] Of course, in other embodiments, the multiple housings of the multiple sound-generating units are integrally formed structures. Optionally, each sound-generating unit further includes a housing, and the magnetic circuit system and vibration system of each sound-generating unit are connected to the housing. The multiple housings are integrally formed structures and arranged along a first direction.

[0149] In this embodiment, as Figures 1 to 6 , Figure 9 As shown, the first sound-generating unit 101 is provided with a first outer shell 1, thereby using the first outer shell 1 to mount and fix the first magnetic circuit system 3 and the first vibration system 2. It can be understood that the first outer shell 1 is located between the first magnetic yoke 31 and the second magnetic yoke 32 along the second direction. The first magnetic yoke 31 is connected to the first outer shell 1, and the second magnetic yoke 32 can be connected to the first outer shell 1 directly or indirectly, which is not limited here.

[0150] Understandably, the first magnetic yoke 31 includes at least a top plate portion 311 located on the side of the first diaphragm assembly 21 facing away from the second magnetic yoke 32, thereby using the top plate portion 311 to mount and fix the first central magnet 331, thus connecting the outer periphery of the first diaphragm 211 to the end of the first housing 1 away from the second magnetic yoke 32, so that the first diaphragm 211 and the top plate portion 311 are opposite and spaced apart, thus ensuring the vibration of the first diaphragm 211.

[0151] In this embodiment, the first magnetic yoke 31 can be a flat plate structure, in which case the first magnetic yoke 31 is formed as a top plate portion 311, and the first magnetic yoke 31 and the first outer shell 1 can be an integrally molded structure. Optionally, the first outer shell 1 is a plastic shell, and the first outer shell 1 and the first magnetic yoke 31 are integrally injection molded. Of course, in other embodiments, the first magnetic yoke 31 and the first outer shell 1 can also be connected by welding or bonding, which is not limited here.

[0152] Understandably, the first outer shell 1 can be a frame structure or frame with openings at both ends. In this case, the first magnetic yoke 31 is connected to one end of the first outer shell 1, and the second magnetic yoke 32 is located at the end of the first outer shell 1 away from the first magnetic yoke 31. Of course, in other embodiments, the first outer shell 1 includes a straight portion and a vertical portion arranged at an angle. The straight portion has an installation opening, the first magnetic yoke 31 is located at the installation opening, and the second magnetic yoke 32 is located on the side of the vertical portion of the first outer shell 1 facing away from the straight portion. This is not limited here.

[0153] In one embodiment, the first magnetic yoke 31 further includes a side plate portion 312 disposed at an angle to the top plate portion 311. The side plate portion 312 is bent toward the side of the first diaphragm assembly 21 to form a support platform 313. The outer periphery of the first diaphragm 211 is sandwiched between the first outer shell 1 and the support platform 313.

[0154] In this embodiment, as Figures 1 to 6 , Figure 9 , Figures 14 to 18 As shown, by setting the first magnetic yoke 31 into a top plate portion 311 and a side plate portion 312 arranged at an angle, and setting a support platform 313 on the side plate portion 312, the support platform 313 can be used to position and install the first outer shell 1, fix the outer periphery of the first diaphragm 211 using the first outer shell 1 and the support platform 313, and position the outer periphery of the first diaphragm 211 away from the top plate portion 311, thus ensuring the vibration of the first diaphragm 211.

[0155] It is understood that the side plate portion 312 of the first magnetic yoke 31 and the first outer shell 1 can be integrally formed. Optionally, the first outer shell 1 is a plastic shell, and the first outer shell 1 and the first magnetic yoke 31 are integrally injection molded. Of course, in other embodiments, the side plate portion 312 of the first magnetic yoke 31 and the first outer shell 1 can be connected by welding or bonding, which is not limited here.

[0156] Of course, in other embodiments, the outer periphery of the first diaphragm 211 may also be fixed to the inner wall of the first housing 1. For example, the inner wall of the first housing 1 may be provided with a support platform or other structure, and the outer periphery of the first diaphragm 211 may be fixed to the support platform or other structure. This is not limited here.

[0157] In one embodiment, the first magnetic circuit system 3 further includes a first side magnetic part 34 disposed on the second magnetic yoke 32. The first side magnetic part 34 is located outside the second central magnet 332 and is spaced apart from the second central magnet 332 to form a first magnetic gap 35. The first side magnetic part 34 includes a first side magnet 341 and a first side magnetic guide plate 342 stacked together. The first side magnet 341 is connected to the second magnetic yoke 32, and the first side magnetic guide plate 342 is connected to the first outer shell 1. The first side magnetic guide plate 342 and the first outer shell 1 are integrally formed.

[0158] In this embodiment, as Figures 3 to 6 , Figure 9 As shown, the first side magnetic part 34 of the first magnetic circuit system 3 is disposed on the second magnetic yoke 32, and the second magnetic yoke 32 can be connected to the first outer shell 1 through the first side magnetic part 34. Optionally, the first side magnetic plate 342 of the first side magnetic part 34 and the first outer shell 1 can be an integrally formed structure. For example, the first outer shell 1 is a plastic shell, and the first outer shell 1 and the first side magnetic plate 342 are integrally injection molded; or, the first outer shell 1 is a metal shell, in which case the first outer shell 1 and the first side magnetic plate 342 are integrally stretched and formed, which is not limited here. Of course, in other embodiments, the first outer shell 1 and the first side magnetic plate 342 can also be connected by welding or bonding, which is not limited here.

[0159] It should be noted that the first outer shell 1 is used to fix the first diaphragm 211 of the first magnetic circuit system 3 and the first vibration system 2, and can also be used to support the first magnetic yoke 31 and the second magnetic yoke 32 of the first magnetic circuit system 3, so that the first magnetic yoke 31 and the second magnetic yoke 32 are arranged opposite each other and spaced apart.

[0160] In one embodiment, a first cavity 11 is formed between the first magnetic yoke 31 and the first diaphragm assembly 21, the first central magnet 331 is located inside the first cavity 11, and the first sound-emitting unit 101 is also provided with a sound outlet 314 communicating with the first cavity 11.

[0161] In this embodiment, as Figures 4 to 6 , Figure 9 As shown, a first cavity 11 is formed between the first magnetic yoke 31 and the first diaphragm assembly 21. The first cavity 11 provides a vibration space for the first diaphragm 211 and a mounting space for the first central magnet 331. Understandably, in order to enable the first diaphragm 211 to produce sound smoothly during vibration, the first sound-producing unit 101 is also provided with a sound outlet 314 communicating with the first cavity 11.

[0162] Understandably, the sound outlet 314 is located in the first outer casing 1; or, as... Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figures 14 to 18 As shown, the sound outlet 314 is located at the first magnetic yoke 31; or, the sound outlet 314 is located at the connection between the first outer shell 1 and the first magnetic yoke 31, which is not limited here.

[0163] In one embodiment, the first magnetic yoke 31 includes a top plate portion 311 and a side plate portion 312 arranged at an included angle. Optionally, as... Figure 15 and Figure 18 As shown, the sound outlet 314 is located on the top plate portion 311 and is opposite to the first diaphragm 211; or, as Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 14 , Figure 17 As shown, the sound outlet 314 is located on the side plate portion 312.

[0164] Understandably, when the sound outlet 314 of the first sound-emitting unit 101 is located on the top plate portion 311 and faces the first diaphragm 211, and the sound-emitting device 100 is applied to an electronic device or sound-emitting module, the housing of the electronic device or sound-emitting module is provided with a sound outlet directly opposite the sound outlet 314 of the first sound-emitting unit 101, thus making the electronic device or sound-emitting module have a front-emitting structure. Alternatively, the sound outlet on the housing of the electronic device or sound-emitting module is located on one side of the sound-emitting device 100, so that the sound outlet is connected to the sound outlet 314 of the first sound-emitting unit 101 through a sound outlet channel, thereby making the electronic device or sound-emitting module have a side-emitting structure.

[0165] Of course, in other embodiments, when the sound outlet 314 of the first sound-emitting unit 101 is located on the side plate portion 312, when the sound-emitting device 100 is applied to an electronic device or a sound-emitting module, and the sound outlet on the housing of the electronic device or the sound-emitting module is directly opposite the first diaphragm 211 of the first sound-emitting unit 101, the sound outlet is connected to the sound outlet 314 through the sound outlet channel, thus making the electronic device or the sound-emitting module have a front-emitting structure. Alternatively, the sound outlet on the housing of the electronic device or the sound-emitting module is located on one side of the sound-emitting device 100, and the sound outlet is correspondingly connected to the sound outlet 314 of the first sound-emitting unit 101, thereby making the electronic device or the sound-emitting module have a side-emitting structure.

[0166] In one embodiment, the two central magnets include a first central magnet 331 and a second central magnet 332, with the first central magnet 331 located near the top of the first voice coil 22 and the second central magnet 332 located near the bottom of the first voice coil 22; wherein the magnetic energy product of the first central magnet 331 is greater than the magnetic energy product of the second central magnet 332. It is understood that this arrangement ensures that the magnetic field strength of the first central magnet 331 is greater than the magnetic field strength of the second central magnet 332.

[0167] In this embodiment, the first side magnetic part 34 is located outside the second central magnet 332, so that the magnetic field strength in the magnetic gap 34 formed by the first side magnetic part 34 and the second central magnet 332 is greater than the magnetic field strength of the first central magnet 331. By setting the magnetic energy product of the first central magnet 331 to be greater than the magnetic energy product of the second central magnet 332, the magnetic field strength at both ends of the first voice coil 22 can be balanced, which can further improve the flatness of the BLx curve and reduce distortion.

[0168] Optionally, the volume of the first central magnet 331 is larger than the volume of the second central magnet 332. When the first central magnet 331 and the second central magnet 332 have the same grade, this ensures that the magnetic field strength of the first central magnet 331 is greater than that of the second central magnet 332. In this embodiment, as... Figures 3 to 5 , Figure 9 As shown, the outer contours of the first central magnet 331 and the second central magnet 332 are the same, and the thickness of the first central magnet 331 along the second direction is greater than the thickness of the second central magnet 332 along the second direction. This results in the magnetic field strength of the first central magnet 331 being greater than that of the second central magnet 332.

[0169] In one implementation, such as Figures 1 to 4 , Figure 9 As shown, the multiple sound-generating units of the sound-generating device 100 are all first sound-generating units 101. It can be understood that the multiple first sound-generating units 101 are arranged side-by-side along a first direction. The structure of each first sound-generating unit 101 is as described in the above embodiment, and will not be repeated here.

[0170] In another embodiment, the plurality of sound-emitting units of the sound-emitting device 100 further includes a second sound-emitting unit, that is, the plurality of sound-emitting units of the sound-emitting device 100 includes at least one first sound-emitting unit 101 and at least one second sound-emitting unit. It is understood that the structure of the first sound-emitting unit 101 is as described in the above embodiments, and will not be repeated here.

[0171] In this embodiment, the second sound-generating unit includes a second vibration system and a second magnetic circuit system. The second vibration system includes a second diaphragm and a second voice coil connected to the second diaphragm. The second diaphragm is located on one side of the second magnetic circuit system and is opposite to and spaced from the second magnetic circuit system. The second magnetic circuit system includes a magnetic yoke and a second central magnetic part and a second side magnetic part disposed on the magnetic yoke. The second side magnetic part is disposed outside the second central magnetic part and is spaced from the second central magnetic part to form a second magnetic gap. The end of the second voice coil away from the second diaphragm is correspondingly disposed with the second magnetic gap. The second central magnetic part includes a third central magnet and a central magnetic plate stacked together. The third central magnet is connected to the magnetic yoke. The second side magnetic part includes a second side magnet and a second side magnetic plate stacked together. The second side magnet is connected to the magnetic yoke.

[0172] Understandably, the structure of the second sound-generating unit can be that of a conventional single-sided sound-generating unit or sound-generating device. For details, please refer to the existing conventional single-sided sound-generating unit or sound-generating device structure, which will not be elaborated here.

[0173] It should be noted that the vibration system of each sound-producing unit also includes a centering support plate. One end of the centering support plate is connected to the voice coil, and the other end of the centering support plate is connected to the outer shell or magnetic circuit system. In this way, the centering support plate is used to further center the voice coil and prevent the voice coil from being polarized or oscillating during vibration.

[0174] In one embodiment, each sound-generating unit of the sound-generating device 100 further includes a housing, and the magnetic circuit system and vibration system of each sound-generating unit are connected to the housing. The multiple housings are integrally formed and arranged along a first direction.

[0175] Understandable, such as Figure 3 As shown, the multiple sound-generating units of the sound-generating device 100 can all be first sound-generating units 101. At this time, the multiple outer shells are multiple first outer shells 1. The multiple first outer shells 1 can be selected as an integrally formed structure and arranged along the first direction.

[0176] Of course, in other embodiments, the plurality of sound-generating units of the sound-generating device 100 include a first sound-generating unit 101 and a second sound-generating unit. In this case, the plurality of housings include a first housing 1 and a second housing. The plurality of first housings 1 and second housings may be integrally formed and arranged along the first direction, which is not limited here.

[0177] In one embodiment, the magnetic circuit system of each sound-generating unit includes a central magnetic part and a side magnetic part disposed outside the central magnetic part. The side magnetic part is spaced apart from the central magnetic part to form a magnetic gap. The multiple central magnetic parts of the multiple sound-generating units are arranged at intervals along a first direction, and two adjacent central magnetic parts share a side magnetic part.

[0178] Understandably, the multiple sound-generating units of the sound-generating device 100 can all be first sound-generating units 101. In this case, the magnetic circuit system is a first magnetic circuit system 3. The first magnetic circuit system 3 includes a first central magnetic part 33 and a first side magnetic part 34 disposed outside the first central magnetic part 33. The first side magnetic part 34 is spaced apart from the first central magnetic part 33 to form a first magnetic gap 35. The multiple first central magnetic parts 33 of the multiple first sound-generating units 101 are arranged at intervals along a first direction, and two adjacent first central magnetic parts 33 share a first side magnetic part 34.

[0179] In this embodiment, the first side magnet 34 of each first sound-emitting unit 101 is disposed outside the first central magnet 33. The first side magnet 34 can be an integral ring structure. In this case, multiple first side magnets 34 can be selected as an integrally formed structure and are arranged extending along the first direction. The integrally formed first side magnet 34 is provided with an accommodating space corresponding to each first central magnet 33, and each first central magnet 33 is located in each accommodating space. This is not limited here. Alternatively, the first side magnet 34 can also be separately arranged, such as... Figure 3As shown, at this time, the portions of the two adjacent first side magnetic parts 34 located between the two adjacent first central magnetic parts 33 are integrally formed, that is, the two adjacent first central magnetic parts 33 share a portion of the first side magnetic part 34, as shown. Figure 3 , Figure 4 , Figure 9 As shown, no limitations are specified here.

[0180] Of course, the multiple sound-generating units of the sound-generating device 100 include a first sound-generating unit 101 and a second sound-generating unit. In this embodiment, the first side magnetic portion 34 of each first sound-generating unit 101 is disposed outside the first central magnetic portion 33, and the second side magnetic portion of each second sound-generating unit is disposed outside the second central magnetic portion. It can be understood that the first side magnetic portion 34 can be an integral ring structure, the second side magnetic portion can be an integral ring structure, and the first side magnetic portion 34 and the second side magnetic portion between adjacent first central magnetic portions 33 and second central magnetic portions can be selected as an integrally formed structure and extended along the first direction, that is, adjacent first central magnetic portions 33 and second central magnetic portions share a side magnetic portion. Alternatively, the first side magnetic portion 34 can also be separately arranged, and the second side magnetic portion can also be separately arranged. In this case, the portion of the adjacent first side magnetic portion 34 and the portion of the second side magnetic portion located between adjacent first central magnetic portions 33 and second central magnetic portions are integrally formed structures, that is, adjacent first central magnetic portions 33 and second central magnetic portions share a side magnetic portion, which is not limited here.

[0181] In one embodiment, the diaphragm assembly of each sound-generating unit includes a diaphragm and a vibrating plate, the inner periphery of the diaphragm is connected to the vibrating plate, and multiple diaphragms are integrally formed and arranged along a first direction.

[0182] Understandable, such as Figure 3 As shown, the multiple sound-generating units of the sound-generating device 100 can all be first sound-generating units 101. In this case, the multiple diaphragms are multiple first diaphragms 211. The multiple first diaphragms 211 can be selected as an integrally formed structure and arranged along the first direction.

[0183] Of course, in other embodiments, the plurality of sound-generating units of the sound-generating device 100 include a first sound-generating unit 101 and a second sound-generating unit. In this case, the plurality of diaphragms include a first diaphragm 211 and a second diaphragm. The plurality of first diaphragms 211 and second diaphragms may be integrally formed structures and arranged along the first direction, which is not limited here.

[0184] In one embodiment, the multiple sound-generating units of the sound-generating device 100 are all first sound-generating units 101. The first magnetic circuit system 3 of each first sound-generating unit 101 includes a first magnetic yoke 31 and a second magnetic yoke 32 arranged opposite to each other. The two central magnets of each first sound-generating unit 101 are respectively connected to the corresponding first magnetic yoke 31 and the corresponding second magnetic yoke 32 in a one-to-one correspondence.

[0185] Optionally, the multiple first magnetic yokes 31 of the multiple first sound-generating units 101 are formed as separate structures, in which case the multiple first magnetic yokes 31 are arranged at intervals along the first direction. Optionally, the multiple first magnetic yokes 31 of the multiple first sound-generating units 101 are formed as an integral structure, that is, the multiple first sound-generating units 101 share a single first magnetic yoke 31, and the first magnetic yoke 31 extends along the first direction, which is not limited here.

[0186] Optionally, the multiple second magnetic yokes 32 of the multiple first sound-generating units 101 are formed as separate structures, in which case the multiple second magnetic yokes 32 are arranged at intervals along the first direction. Optionally, the multiple second magnetic yokes 32 of the multiple first sound-generating units 101 are formed as an integral structure, that is, the multiple first sound-generating units 101 share a single second magnetic yoke 32, and the second magnetic yoke 32 extends along the first direction, which is not limited here.

[0187] In one embodiment, the sound-generating device 100 includes two sound-generating units arranged side by side along a first direction; wherein the two diaphragm assemblies jointly radiate sound waves outward from the same side of the sound-generating device 100.

[0188] In this embodiment, the two diaphragm assemblies radiate sound waves outward from the same side of the sound-generating device 100, which can achieve the superposition and enhancement of sound waves, thereby increasing the loudness of the sound-generating device 100.

[0189] Understandably, both sound-generating units can be the first sound-generating unit 101. In this case, the two first diaphragm assemblies 21 of the two first sound-generating units 101 jointly radiate sound waves outward from the same side of the sound-generating device 100. Alternatively, the two sound-generating units can be the first sound-generating unit 101 and the second sound-generating unit. In this case, the first diaphragm assembly 21 of the first sound-generating unit 101 and the second diaphragm assembly of the second sound-generating unit jointly radiate sound waves outward from the same side of the sound-generating device 100.

[0190] Optionally, the two diaphragm assemblies of the two sound-generating units of the sound-generating device 100 simultaneously radiate sound waves of the same phase outward. In this embodiment, the two diaphragm assemblies may vibrate in the same direction, and the two diaphragm assemblies together radiate sound waves outward on the same side of the sound-generating device 100, which can achieve mutual superposition and enhancement of sound waves, thereby increasing loudness.

[0191] Optionally, the two diaphragm assemblies of the two sound-generating units of the sound-generating device 100 simultaneously radiate sound waves with opposite phases. In this embodiment, the two diaphragm assemblies of the two sound-generating units of the sound-generating device 100 can be selected to vibrate in opposite directions. In this way, both diaphragm assemblies of the two sound-generating units of the sound-generating device 100 are in communication with the external environment, and the two diaphragm assemblies radiate sound waves with opposite phases to the external environment. The two sound waves with opposite phases cancel each other out in the far field, which is suitable for environments that require far-field noise reduction and privacy protection.

[0192] It should be noted that the multiple sound-generating units in the sound-generating device 100 form multiple vibration systems. The multiple vibration systems of the sound-generating device 100 can be independent of each other and do not affect each other. The structural design can be completely consistent (for example, multiple sound-generating units are all the first sound-generating unit 101), thereby simplifying the debugging of the whole machine.

[0193] like Figures 19 to 25 As shown, this utility model also proposes a sound-generating module 500, 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.

[0194] In one embodiment, the sound-generating module 500 further includes a module housing 400, which has a receiving cavity, and the sound-generating device 100 is disposed in the receiving cavity, dividing the receiving cavity into a front cavity and a rear cavity 420; wherein, the module housing 400 has a sound outlet 410 communicating with the front cavity.

[0195] In this embodiment, the module housing 400 can be a metal housing or a plastic housing, and is not limited thereto. The module housing 400 can be a one-piece structure or a split structure, and is not limited thereto. The module housing 400 includes an upper module housing and a lower module housing, which are mated together and enclosed to form a receiving cavity. Optionally, the upper module housing and the lower module housing can be bonded together or welded together.

[0196] Optionally, the outer contour of the module housing 400 can be a square structure. In specific applications, other suitable shapes such as circles can be selected according to the actual situation, and it is not limited to a specific shape.

[0197] In this embodiment, the sound-generating device 100 is disposed within the receiving cavity, which is divided into a front cavity and a rear cavity 420. The upper shell of the module corresponds to the front cavity, and the lower shell of the module corresponds to the rear cavity 420. It is understood that the sound outlet 410 is located on the upper shell of the module or at the connection between the upper and lower shells.

[0198] In one embodiment, the module housing 400 is further provided with a vent hole communicating with the rear cavity 420 for adjusting the pressure within the rear cavity 420. It is understood that the vent hole is located in the lower housing of the module. Optionally, the vent hole can be a circular hole, an elliptical hole, or a polygonal hole, etc., and is not limited here. The number of vent holes can be one or more, depending on the actual application design, and is not limited here.

[0199] Understandably, the upper shell of the module includes a top wall and a first side wall, and the lower shell of the module includes a bottom wall and a second side wall. The first and second side walls together form the side walls of the module housing 400 of the sound-emitting module 500. That is, the module housing 400 includes a top wall and a bottom wall disposed opposite each other, and a side wall connecting the top wall and the bottom wall. Optionally, the sound outlet 410 is located in the connection area between the top wall and the side wall, and the sound leakage hole is located in the connection area between the side wall and the bottom wall. In this way, the sound-emitting performance of the sound-emitting module 500 and the technical effect of protecting privacy can be taken into account. The most suitable design scheme can be selected according to actual needs during use, and this utility model does not limit it.

[0200] In this embodiment, as Figures 19 to 25 As shown, the top wall of the upper shell of the module has a first opening, and the bottom wall of the lower shell of the module has a second opening. When the sound-generating device 100 is installed in the module housing 400, the first magnetic yoke 31 of the sound-generating device 100 corresponds to or is located at the first opening, and the second magnetic yoke 32 of the sound-generating device 100 corresponds to or is located at the second opening. It can be understood that the first opening can be a sound outlet 410; or, the first opening is only used to install the sound-generating device 100 to reduce the thickness of the sound-generating module 500 in the Z direction, which is not limited here.

[0201] In one implementation, such as Figure 20 , Figure 21 , Figure 24 and Figure 25 As shown, the diaphragm assemblies of the sound outlet 410 and the multiple sound-generating units of the sound-generating device 100 are all arranged facing each other, so that the sound-generating module 500 has a positive sound output structure.

[0202] Optionally, the sound output port 410 of the sound module 500 is one.

[0203] In one embodiment, the sound outlet 410 and the diaphragm assemblies of the plurality of sound-generating units of the sound-generating device 100 are all arranged facing each other, so that the sound-generating module 500 has a forward sound-emitting structure. It can be understood that the sound outlet 410 and the plurality of sound outlet holes 314 of the sound-generating device 100 are arranged facing each other and connected; or, the sound outlet 410 is connected to the plurality of sound outlet holes 314 of the sound-generating device 100 through a sound outlet channel, which is not limited here.

[0204] In another embodiment, the sound outlet 410 is located on one side of the sound-generating device 100, so that the sound-generating module 500 has a side-emitting structure, which is not limited here. It can be understood that the sound outlet 410 of the sound-generating module 500 is located on one side of the sound-generating device 100, that is, the sound outlet 410 is not directly opposite to the multiple diaphragm assemblies of the sound-generating device 100, but is located on one side of the periphery of the multiple diaphragm assemblies. In this case, the sound-generating module 500 has a side-emitting structure.

[0205] Optionally, the sound outlet 410 is arranged to be directly connected to the plurality of sound outlet holes 314 of the sound generating device 100; or, the sound outlet 410 is connected to the plurality of sound outlet holes 314 of the sound generating device 100 through a sound outlet channel, which is not limited here.

[0206] Optionally, the module housing 400 is provided with multiple sound outlets 410.

[0207] In one embodiment, a plurality of sound outlets 410 are provided on the same side of the module housing 400, and each sound outlet 410 is directly opposite to the diaphragm assembly of each sound-generating unit of the sound-generating device 100, so that the sound-generating module 500 has a positive sound-generating structure.

[0208] In another embodiment, such as Figure 19 , Figure 23 As shown, multiple sound outlets 410 are located on the same side of the module housing 400, and each sound outlet 410 is located on one side of the sound generating device 100, so that the sound generating module 500 has a side-emitting structure.

[0209] In yet another implementation, such as Figure 22 As shown, multiple sound outlets 410 are respectively disposed on different sides of the module housing 400, and at least one sound outlet 410 is directly opposite to the diaphragm assembly of at least one sound-generating unit of the sound-generating device 100, and at least one sound outlet 410 is located on one side of the sound-generating device 100.

[0210] Understandably, this allows some of the sound-emitting units in the sound-emitting device 100 of the module housing 400 to have a front-emitting structure and some to have a side-emitting structure, achieving a combination of front-emitting and side-emitting structures, which can be adapted to various assembly modes of the whole machine and improve the degree of freedom.

[0211] This utility model also proposes an electronic device, 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.

[0212] This utility model also proposes an electronic device, which includes the aforementioned sound-generating module 500. The specific structure of the sound-generating module 500 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 repeated here.

[0213] Optionally, the aforementioned electronic device may be a mobile phone, earphones, computer, PAD, smart wearable device, etc., and this utility model does not impose specific limitations on it.

[0214] 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 plurality of sound-generating units arranged side by side along a first direction. Each sound-generating unit includes a magnetic circuit system and a vibration system. The magnetic circuit system is provided with a magnetic gap. The vibration system vibrates along a second direction perpendicular to the first direction. The vibration system includes a diaphragm assembly and a voice coil. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is correspondingly arranged with respect to the magnetic gap. Wherein, at least one of the sound-generating units is defined as a first sound-generating unit, the diaphragm assembly of the first sound-generating unit is a first diaphragm assembly, the first diaphragm assembly includes a first diaphragm and a first diaphragm plate, the inner periphery of the first diaphragm is connected to the first diaphragm plate, the first diaphragm plate includes a first plate portion and a second plate portion located on different horizontal planes, the voice coil of the first sound-generating unit is a first voice coil, the top of the first voice coil is connected to the first plate portion, the second plate portion is located inside the first voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the first voice coil, the magnetic circuit system of the first sound-generating unit is a first magnetic circuit system, the first magnetic circuit system has a first magnetic gap, the first magnetic circuit system includes a first central magnetic portion, the first central magnetic portion includes two central magnets that are opposite to each other and spaced apart along the second direction, the two central magnets are located on opposite sides of the second plate portion, the projection of the two central magnets along the second direction is located inside the first voice coil, and the side of the two central magnets facing the first diaphragm assembly is exposed in the internal cavity of the sound-generating device, and the two central magnets are magnetized along the second direction and in opposite directions.

2. The sound-generating device as described in claim 1, characterized in that, The first diaphragm also includes a third plate portion, which is located inside the first voice coil and is attached to the inner peripheral wall of the first voice coil. The two ends of the third plate portion along the second direction are respectively connected to the first plate portion and the second plate portion. The first plate, the third plate, and the second plate are integrally formed structures.

3. The sound-generating device as described in claim 1, characterized in that, The vibration system of the first sound-generating unit is a first vibration system. The first vibration system further includes a waterproof membrane. The waterproof membrane includes a first connecting portion located at the top of the first voice coil, a second connecting portion that is in contact with the inner peripheral wall of the first voice coil, and a third connecting portion located inside the first voice coil. The first plate portion is connected to the first connecting portion, and the second plate portion is connected to the third connecting portion.

4. The sound-generating device as described in claim 3, characterized in that, The first connecting portion is sandwiched between the first plate portion and the top of the first voice coil; or, the inner periphery of the first diaphragm is sandwiched between the first plate portion and the first connecting portion. And / or, the second plate portion is located on the side of the third connecting portion facing the top of the first voice coil; And / or, the first connecting part, the second connecting part and the third connecting part are integrally formed structures; And / or, the extension length of the second connecting portion along the second direction is less than the extension length of the first voice coil along the second direction; And / or, the first connecting portion and the third connecting portion are respectively connected to the two ends of the second connecting portion along the second direction.

5. The sound-generating device as described in claim 1, characterized in that, The outer periphery of the first plate is recessed and bent toward the first voice coil to form a stepped portion, and the inner periphery of the first diaphragm is supported and overlapped with the stepped portion; And / or, along the second direction, the distances between the opposite sides of the second plate and the corresponding central magnets are the same.

6. The sound-generating device as claimed in claim 1, characterized in that, The first magnetic circuit system further includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other. The two central magnets include a first central magnet and a second central magnet. The side of the first central magnet facing away from the first diaphragm assembly is connected to the first magnetic yoke, and the side of the second central magnet facing away from the first diaphragm assembly is connected to the second magnetic yoke.

7. The sound-generating device as described in claim 6, characterized in that, The first magnetic circuit system further includes a first side magnetic portion disposed on the second magnetic yoke. The first side magnetic portion is located outside the second central magnet and is spaced apart from the second central magnet to form the first magnetic gap. The first side magnetic portion includes a first side magnet and a first side magnetic plate stacked together. The first side magnet is connected to the second magnetic yoke. Wherein, the projection of the first side magnetic plate along the first direction is located between the top and bottom of the first voice coil; and / or, the projection of the first side magnetic plate along the first direction is located between the surfaces of the first center magnet and the second center magnet facing the first diaphragm assembly; and / or, the thickness of the first side magnet along the second direction is greater than the thickness of the second center magnet along the second direction.

8. The sound-generating device as described in claim 6, characterized in that, The second magnetic yoke includes a bottom and a side portion formed by bending and extending the periphery of the bottom toward the first diaphragm assembly, and the second central magnet is disposed on the bottom and spaced from the side portion to form the first magnetic gap.

9. The sound-generating device as described in claim 6, characterized in that, The outer periphery of the first magnetic yoke bends and extends toward the second magnetic yoke to form a first welded portion, and the first welded portion is welded to the outer periphery of the second magnetic yoke; And / or, the outer periphery of the second magnetic yoke bends and extends toward the first magnetic yoke to form a second welded portion, and the second welded portion is welded to the outer periphery of the first magnetic yoke.

10. The sound-generating device as claimed in claim 6, characterized in that, Each of the aforementioned sound-generating units further includes a housing, and the magnetic circuit system and the vibration system of each of the aforementioned sound-generating units are connected to the housing; Wherein, the outer shell of the first sound-emitting unit is a first outer shell, the first outer shell is connected to the first magnetic yoke and the second magnetic yoke respectively, and is located between the first magnetic yoke and the second magnetic yoke, the first magnetic yoke includes at least a top plate portion located on the side of the first diaphragm assembly facing away from the second magnetic yoke, the first central magnet is disposed on the top plate portion, the outer periphery of the first diaphragm is connected to the end of the first outer shell away from the second magnetic yoke, and the first diaphragm is opposite to and spaced apart from the top plate portion.

11. The sound-generating device as claimed in claim 10, characterized in that, The first magnetic yoke also includes a side plate portion that is angled to the top plate portion. The side plate portion is bent toward the side of the first diaphragm assembly to form a support platform. The outer periphery of the first diaphragm is sandwiched between the first housing and the support platform. And / or, the first outer shell is a plastic shell, and the first outer shell and the first magnetic yoke are integrally injection molded.

12. The sound-generating device as claimed in claim 10, characterized in that, The first magnetic circuit system further includes a first side magnetic part disposed on the second magnetic yoke. The first side magnetic part is located outside the second central magnet and is spaced apart from the second central magnet to form the first magnetic gap. The first side magnetic part includes a first side magnet and a first side magnetic plate stacked together. The first side magnet is connected to the second magnetic yoke, and the first side magnetic plate is connected to the first outer shell. The first side magnetic plate and the first outer shell are integrally formed.

13. The sound-generating device as claimed in claim 10, characterized in that, A first cavity is formed between the first magnetic yoke and the first diaphragm assembly, the first central magnet is located in the first cavity, and the first sound-generating unit is also provided with a sound outlet hole communicating with the first cavity. The sound outlet is located in the first outer shell; Alternatively, the first magnetic yoke includes a top plate portion and a side plate portion arranged at an angle, with the sound outlet located on the top plate portion and opposite to the first diaphragm; or, the sound outlet is located on the side plate portion. Alternatively, the sound outlet may be located at the connection between the first outer shell and the first magnetic yoke.

14. The sound-generating device as claimed in claim 1, characterized in that, The two center magnets include a first center magnet and a second center magnet, the first center magnet being close to the top of the first voice coil and the second center magnet being close to the bottom of the first voice coil; Wherein, the magnetic energy product of the first central magnet is greater than the magnetic energy product of the second central magnet; or, the volume of the first central magnet is greater than the volume of the second central magnet; or, the outer contours of the first central magnet and the second central magnet are the same, and the thickness of the first central magnet along the second direction is greater than the thickness of the second central magnet along the second direction.

15. The sound-generating device as claimed in claim 1, characterized in that, The multiple sound-generating units of the sound-generating device are all the first sound-generating units. Each first magnetic circuit system includes a first magnetic yoke and a second magnetic yoke arranged opposite to each other. The two central magnets are respectively connected to the first magnetic yoke and the second magnetic yoke in a one-to-one correspondence. The multiple first magnetic yokes are formed as a separate structure; or, the multiple first magnetic yokes are formed as a one-piece molded structure; and / or, the multiple second magnetic yokes are formed as a separate structure; or, the multiple second magnetic yokes are formed as a one-piece molded structure. And / or, each of the sound-generating units further includes a housing, and the magnetic circuit system and the vibration system of each of the sound-generating units are connected to the housing. The plurality of housings are integrally formed and arranged along the first direction. And / or, the magnetic circuit system of each of the sound-generating units includes a central magnetic part and a side magnetic part disposed outside the central magnetic part, the side magnetic part being spaced apart from the central magnetic part to form the magnetic gap, the multiple central magnetic parts of the multiple sound-generating units being arranged at intervals along the first direction, and two adjacent central magnetic parts sharing one side magnetic part; And / or, the diaphragm assembly of each of the said sound-generating units includes a diaphragm and a vibrating plate, the inner periphery of the diaphragm is connected to the vibrating plate, and the plurality of diaphragms are integrally formed structures and arranged along the first direction.

16. The sound-generating device according to any one of claims 1 to 14, characterized in that, The plurality of sound-generating units also include a second sound-generating unit. The second sound-generating unit includes a second vibration system and a second magnetic circuit system. The second vibration system includes a second diaphragm and a second voice coil connected to the second diaphragm. The second diaphragm is located on one side of the second magnetic circuit system and is opposite to and spaced from the second magnetic circuit system. The second magnetic circuit system includes a magnetic yoke and a second central magnetic part and a second side magnetic part disposed on the magnetic yoke. The second side magnetic part is disposed outside the second central magnetic part and is spaced from the second central magnetic part to form a second magnetic gap. The end of the second voice coil away from the second diaphragm is disposed corresponding to the second magnetic gap. The second central magnetic part includes a third central magnet and a central magnetic plate stacked together, the third central magnet being connected to the magnetic yoke; the second side magnetic part includes a second side magnet and a second side magnetic plate stacked together, the second side magnet being connected to the magnetic yoke.

17. The sound-generating device according to any one of claims 1 to 14, characterized in that, The sound-generating device includes two sound-generating units arranged side by side along a first direction; The two diaphragm assemblies together radiate sound waves outward from the same side of the sound-generating device; And / or, both diaphragm assemblies simultaneously radiate sound waves of the same phase outward; or, both diaphragm assemblies simultaneously radiate sound waves of opposite phase outward.

18. A sound-generating module, characterized in that, The sound-generating module includes: Module housing, the module housing having a receiving cavity; and The sound-generating device as described in any one of claims 1 to 17 is disposed within the receiving cavity and divides the receiving cavity into a front cavity and a rear cavity; The module housing is provided with a sound outlet that communicates with the front cavity.

19. The sound-generating module as described in claim 18, characterized in that, The sound outlet and the diaphragm assemblies of the multiple sound-generating units of the sound-generating device are all arranged directly opposite each other, so that the sound-generating module has a positive sound output structure; Alternatively, the module housing may have multiple sound outlets; wherein the multiple sound outlets are all located on the same side of the module housing, and each sound outlet is directly opposite to the diaphragm assembly of each sound-emitting unit of the sound-emitting device, so that the sound-emitting module has a front-emitting structure; or, the multiple sound outlets are all located on the same side of the module housing, and each sound outlet is located on one side of the sound-emitting device, so that the sound-emitting module has a side-emitting structure; or, the multiple sound outlets are respectively located on different sides of the module housing, at least one sound outlet is directly opposite to the diaphragm assembly of at least one sound-emitting unit of the sound-emitting device, and at least one sound outlet is located on one side of the sound-emitting device.

20. An electronic device, characterized in that, The electronic device includes the sound-generating module as described in claim 18 or 19; Alternatively, the electronic device may include a sound-generating device as described in any one of claims 1 to 17.

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