Sound production device and electronic device

Abstract

The application discloses a sound generating device and electronic equipment, and relates to the technical field of electroacoustic conversion. The vibration plate of the vibration system in the sound generating device comprises a first plate part and a second plate part located on different horizontal planes. The top of a voice coil is connected with the first plate part. The second plate part is located on the inner side of the voice coil and is abuttingly arranged with the inner peripheral wall of the voice coil. First magnetic path assemblies and second magnetic path assemblies of a magnetic path system are located on opposite sides of a diaphragm assembly. A first side magnetic part of the first magnetic path assembly is located on the outer side of a first center magnetic part and is spaced to form a magnetic gap. The end of the voice coil away from the first plate part is suspended in the magnetic gap. A second side magnetic part of the second magnetic path assembly is located on the outer side of a second center magnetic part. The first center magnetic part and the second center magnetic part are oppositely arranged, and the projections in the first direction of the first center magnetic part and the second center magnetic part are both located on the inner side of the voice coil. The sound generating device of the application increases the volume of the magnet, improves the BL value, makes the magnetic force line distribution more uniform, and thus improves the acoustic performance.

Description

Technical Field

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

[0002] In recent years, with the 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, the magnetic circuit system of a loudspeaker is usually placed in the rear cavity. Due to the limited internal space, the number and size of magnets are limited, which prevents the loudspeaker from reaching its full potential and fails to meet consumers' higher demands for end electronic products. Summary of the Invention

[0004] The main objective of this invention is to provide a sound-generating device and an electronic device that addresses the problem of limited internal space in existing sound-generating devices, which prevents the increase of magnet volume. This sound-generating device increases magnet volume, improves the BL value, and makes the magnetic field lines more evenly distributed, thereby improving acoustic performance.

[0005] To achieve the above objectives, the present invention provides a sound-generating device, the sound-generating device comprising: shell; A vibration system, disposed within the housing and vibrating along a first direction, includes a diaphragm assembly and a voice coil. The diaphragm assembly includes a diaphragm and a diaphragm plate. The diaphragm plate includes a first plate portion and a second plate portion located on different horizontal planes. The inner periphery of the diaphragm is connected to the first plate portion, and the top of the voice coil is connected to the first plate portion. The second plate portion is located inside the voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the voice coil. A magnetic circuit system is disposed within the housing. The magnetic circuit system includes a first magnetic circuit assembly and a second magnetic circuit assembly located on opposite sides of the diaphragm assembly along the first direction. The first magnetic circuit assembly includes a first central magnetic part and a first side magnetic part. The first side magnetic part is located outside the first central magnetic part and is spaced apart from the first central magnetic part to form a magnetic gap. The end of the voice coil away from the first plate is suspended in the magnetic gap. The second magnetic circuit assembly includes a second central magnetic part and a second side magnetic part. The second side magnetic part is located outside the second central magnetic part. The first central magnetic part and the second central magnetic part are arranged opposite to each other along the first direction, and the projections of the first central magnetic part and the second central magnetic part along the first direction are both located inside the voice coil. Wherein, the first central magnetic part and the first side magnetic part are both magnetized along the first direction but in opposite directions, the first central magnetic part and the second central magnetic part are both magnetized along the first direction but in opposite directions, the second side magnetic part is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the second side magnetic part near the second central magnetic part has the same polarity as the magnetic pole of the second central magnetic part facing the second plate.

[0006] In one embodiment, the projection of the second side magnetic portion along the first direction at least partially coincides with the projection of the magnetic gap along the first direction; And / or, the second side magnetic part is disposed in close contact with the second central magnetic part; or, there is a gap between the second side magnetic part and the second central magnetic part, the width of the gap being no greater than 0.02 mm.

[0007] In one embodiment, the second side magnetic portion has a closed ring structure with the ends connected, and the second side magnetic portion is arranged around the outside of the second central magnetic portion; Alternatively, the second side magnetic part may include multiple parts, which are connected end to end to form a ring structure and are arranged around the outside of the second central magnetic part; Alternatively, the second side magnetic portion may include a plurality of second side magnetic portions, which are spaced apart and arranged around the outside of the second central magnetic portion; Alternatively, the second side magnetic part includes two parts, which are respectively disposed on opposite sides of the second central magnetic part along the second direction, and both the second side magnetic parts and the second central magnetic part extend along the third direction; wherein the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0008] In one embodiment, the first central magnetic part includes a first central magnet, the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together, the second central magnetic part includes a second central magnet, and the second side magnetic part includes a second side magnet. The sides of the first central magnet, the second central magnet, and the second side magnet facing the diaphragm assembly are all exposed in the internal cavity of the sound-generating device.

[0009] In one embodiment, the thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate facing the second central magnet to the second central magnet; And / or, the second plate portion is located at the middle position of the voice coil along the first direction; And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

[0010] In one embodiment, the first central magnetic part includes a first central magnet and a first central magnetic plate stacked together, the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together, the second central magnetic part includes a second central magnet, and the second side magnetic part includes a second side magnet. The sides of the second central magnet and the second side magnet facing the diaphragm assembly are both exposed in the internal cavity of the sound-generating device.

[0011] In one embodiment, the thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate facing the first central magnetic plate to the first central magnetic plate is the same as the distance from the side of the second plate facing the second central magnet to the second central magnet; And / or, the voice coil has a first end near the first plate portion and a second end away from the first plate portion, the second plate portion being located between the middle position of the voice coil and the first end; And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

[0012] In one embodiment, the first central magnetic part includes a first central magnet, the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together, the second central magnetic part includes a second central magnet and a second central magnetic plate stacked together, and the second side magnetic part includes a second side magnet. The sides of the first central magnet and the second side magnet facing the diaphragm assembly are both exposed in the internal cavity of the sound-generating device.

[0013] In one embodiment, the thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate portion facing the second central magnetic plate to the second central magnetic plate; And / or, the voice coil has a first end near the first plate portion and a second end away from the first plate portion, the second plate portion being located between the middle position of the voice coil and the second end; And / or, the thickness of the first side magnet along the first direction is greater than the thickness of the first center magnet along the first direction, and the thickness of the first side magnet along the first direction is less than or equal to twice the thickness of the first center magnet along the first direction. And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

[0014] In one embodiment, the first magnetic circuit assembly further includes an intermediate magnet disposed between the first central magnetic portion and the first side magnetic portion. The side of the intermediate magnet facing the diaphragm assembly is exposed in the internal cavity of the sound-generating device. The thickness of the intermediate magnet along the first direction is less than the thickness of the first central magnetic portion and the first side magnetic portion along the first direction, so that the first side magnetic portion, the intermediate magnet, and the first central magnetic portion enclose and form the magnetic gap. The intermediate magnet is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the intermediate magnet near the first central magnetic part has the same polarity as the magnetic pole of the first central magnetic part facing the second plate.

[0015] In one embodiment, the first side magnetic portion includes a first side magnet and a first side magnetic plate stacked together, the first side magnetic plate extending toward the magnetic gap and forming an extension located at the top of the intermediate magnet; wherein, the ratio of the extension length of the extension to the width between the first central magnetic portion and the first side magnetic portion is less than 0.5; And / or, the two opposite sides of the intermediate magnet are respectively attached to the first central magnetic part and the first side magnetic part.

[0016] In one embodiment, the outer casing includes a first housing and a second housing disposed opposite to each other. The sound-generating device further includes a bracket. The outer periphery of the diaphragm assembly is connected to the bracket. The bracket is connected to the first housing and the second housing respectively and is located between the first housing and the second housing. A first cavity is formed between the diaphragm assembly and the first housing. A second cavity is formed between the diaphragm assembly and the second housing. A first magnetic circuit assembly is disposed in the first cavity. The first central magnetic part and the first side magnetic part are connected to the first housing on the side facing away from the diaphragm assembly. A second magnetic circuit assembly is disposed in the second cavity. The second central magnetic part and the second side magnetic part are connected to the second housing on the side facing away from the diaphragm assembly. Wherein, the second housing is provided with a sound outlet communicating with the second cavity; or, the bracket is provided with a sound outlet communicating with the second cavity; or, the bracket and the second housing cooperate to form a sound outlet communicating with the second cavity.

[0017] In one embodiment, the first housing includes a first flat plate portion and a first side plate portion disposed around the periphery of the first flat plate portion and extending toward the bracket. One end of the first side plate portion away from the first flat plate portion is connected to the bracket. The second housing includes a second flat plate portion and a second side plate portion disposed around the periphery of the second flat plate portion and extending toward the bracket. One end of the second side plate portion away from the second flat plate portion is connected to the bracket. The outer periphery of the diaphragm assembly is sandwiched between the second side plate portion and the bracket. The second side plate portion is provided with the sound outlet. And / or, the bracket is a metal part, and the bracket is welded to the first housing and the second housing respectively; or, the bracket is a plastic part, and the bracket is bonded to the first housing and the second housing respectively; And / or, the sound-generating device further includes a welding part that extends along the first direction, one end of the welding part being welded to the first housing and the other end of the welding part being welded to the second housing; And / or, both the first housing and the second housing are made of magnetically conductive material.

[0018] The present invention also proposes an electronic device, which includes the sound-generating device described above.

[0019] The sound-generating device of this invention houses a vibration system and a magnetic circuit system within a casing. The casing provides installation, fixation, and protection for both systems. The vibration system comprises a diaphragm assembly and a voice coil. The magnetic circuit system consists of a first magnetic circuit assembly and a second magnetic circuit assembly located on opposite sides of the diaphragm assembly. The first side magnetic portion of the first magnetic circuit assembly is positioned outside the first central magnetic portion, spaced apart to form a magnetic gap. One end of the voice coil is suspended within this gap. The second side magnetic portion of the second magnetic circuit assembly is positioned outside the second central magnetic portion. Current is then passed through the voice coil, causing it to reciprocate within the magnetic field created by the magnetic circuit system, thus driving the diaphragm assembly along… The first direction of movement drives the air to produce sound. Both the first and second central magnetic parts are magnetized along the first direction but in opposite directions. The first central magnetic part and the first side magnetic part are also magnetized along the first direction but in opposite directions, forming a magnetically opposed structure. The second side magnetic part is magnetized in a direction perpendicular to the first direction, and the magnetic pole on the side of the second side magnetic part closest to the second central magnetic part has the same polarity as the magnetic pole on the side of the second central magnetic part facing the second plate. This allows the first central magnetic part and the first side magnetic part to form a magnetic circuit passing through the voice coil located within the magnetic gap. The second central magnetic part and the second side magnetic part cooperate to form a magnetic circuit passing through the voice coil. This not only effectively increases the magnetic field strength using the second magnetic circuit assembly... The magnet volume of the circuit system can also utilize the first and second magnetic circuit components located on opposite sides of the diaphragm assembly to enhance the magnetic field strength in the voice coil region, thereby increasing the magnetic induction intensity of the sound-generating device and thus increasing the magnetic force on the voice coil. This can increase the BL value of the sound-generating device. Even when the voice coil moves to the side away from the magnetic gap, the magnetic force on the voice coil will be increased under the action of the second magnetic circuit component, thereby improving the sound sensitivity, sound quality, and acoustic performance of the sound-generating device. Furthermore, by utilizing the first plate portion and the second plate portion located on different horizontal planes along the first direction in the diaphragm plate, and the first central magnetic portion and the second central magnetic portion being arranged opposite each other along the first direction, the first central magnetic portion and the second central magnetic portion can achieve the desired magnetic field strength. The projection of the magnetic part along the first direction is located inside the voice coil. Thus, during the movement of the diaphragm assembly, the voice coil and the second plate provide accommodating space for the first and second central magnetic parts, allowing them to be closer to the voice coil and enhancing the magnetic field. This effectively solves the problem of insufficient magnetic force affecting acoustic performance when the voice coil moves away from the magnetic gap during reciprocating motion. At the same time, the first and second magnetic circuit components located on opposite sides of the diaphragm assembly form magnetic loops passing through the voice coil, which not only increases the magnet volume and improves the BL value, but also makes the magnetic field lines more uniformly distributed and the BLx curve flatter, thereby reducing distortion and improving acoustic performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the sound-generating device provided by the present invention; Figure 2 A cross-sectional view along the second direction in the first embodiment of the sound-generating device provided by the present invention; Figure 3 A cross-sectional view along a third direction in the first embodiment of the sound-generating device provided by the present invention; Figure 4 A cross-sectional view along the second direction in a second embodiment of the sound-generating device provided by the present invention; Figure 5 A cross-sectional view along the second direction in the third embodiment of the sound-generating device provided by the present invention; Figure 6 A cross-sectional view along the second direction in the fourth embodiment of the sound-generating device provided by the present invention; Figure 7 A cross-sectional view along the second direction in the fifth embodiment of the sound-generating device provided by the present invention; Figure 8 A cross-sectional view along the second direction in the sixth embodiment of the sound-generating device provided by the present invention; Figure 9 An exploded view of an embodiment of the sound-generating device provided by the present invention; Figure 10 This is a cross-sectional schematic diagram of an embodiment of the vibration system provided by the present invention; Figure 11 This is an exploded view of an embodiment of the vibration system provided by the present invention.

[0022] Explanation of icon numbers: 100. Sound-generating device; 1. Housing; 11. First cavity; 12. Second cavity; 13. First shell; 131. First flat plate portion; 132. First side plate portion; 14. Second shell; 141. Second flat plate portion; 142. Second side plate portion; 143. Sound outlet; 2. Vibration system; 21. Diaphragm assembly; 211. Diaphragm; 212. Vibrating plate; 2121. First plate portion; 2122. Second plate portion; 22. Voice coil; 3. Magnetic circuit system; 33. First magnetic circuit assembly; 331 3311 First central magnetic part; 3312 First central magnetic guide plate; 332 First side magnetic part; 3321 First side magnet; 3322 First side magnetic guide plate; 3323 Extension part; 333 Intermediate magnet; 334 Magnetic gap; 34 Second magnetic circuit assembly; 341 Second central magnetic part; 3411 Second central magnet; 3412 Second central magnetic guide plate; 342 Second side magnetic part; 3421 Second side magnet; 4. Welding part; 5. Support.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] 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.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0028] This invention proposes a sound-generating device 100. It is understood that the sound-generating device 100 is applied to electronic devices, such as mobile phones, headphones, smart wearable devices, etc., and is not limited thereto.

[0029] Please refer to the reference. Figures 1 to 11 As shown, in this embodiment of the invention, the sound-generating device 100 includes a housing 1, a vibration system 2, and a magnetic circuit system 3. The vibration system 2 is disposed inside the housing 1 and vibrates along a first direction. The vibration system 2 includes a diaphragm assembly 21 and a voice coil 22. The diaphragm assembly 21 includes a diaphragm 211 and a vibrating plate 212. The vibrating plate 212 includes a first plate portion 2121 and a second plate portion 2122 located on different horizontal planes. The inner periphery of the diaphragm 211 is connected to the first plate portion 2121. The top of the voice coil 22... Connected to the first plate portion 2121, the second plate portion 2122 is located inside the voice coil 22, and the outer periphery of the second plate portion 2122 abuts against the inner peripheral wall of the voice coil 22. The magnetic circuit system 3 is disposed inside the housing 1. The magnetic circuit system 3 includes a first magnetic circuit assembly 33 and a second magnetic circuit assembly 34 located on opposite sides of the diaphragm assembly 21 along a first direction. The first magnetic circuit assembly 33 includes a first central magnetic portion 331 and a first side magnetic portion 332. The first side magnetic portion 332 is located outside the first central magnetic portion 331. The second magnetic circuit assembly 34 includes a second central magnetic part 341 and a second side magnetic part 342, with the second side magnetic part 342 located outside the second central magnetic part 341. The first central magnetic part 331 and the second central magnetic part 341 are arranged opposite to each other along a first direction, and the first central magnetic part 331 and the second central magnetic part 341 are arranged opposite to each other along the first direction. The projections are all located inside the voice coil 22; wherein, the first central magnetic part 331 and the first side magnetic part 332 are both magnetized along the first direction and the magnetization directions are opposite, the first central magnetic part 331 and the second central magnetic part 341 are both magnetized along the first direction and the magnetization directions are opposite, the second side magnetic part 342 is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the second side magnetic part 342 near the second central magnetic part 341 has the same polarity as the magnetic pole of the second central magnetic part 341 facing the second plate part 2122.

[0030] In this embodiment, the sound-generating device 100 can be a single unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. It is understood that the housing 1 of the sound-generating device 100 is used to install, fix, and support components such as the magnetic circuit system 3 and the vibration system 2; that is, the housing 1 provides a mounting base for components such as the magnetic circuit system 3 and the vibration system 2. The magnetic circuit system 3 and the vibration system 2 are housed within the housing 1, and are arranged opposite to each other. The first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 located on opposite sides of the diaphragm assembly 21 in the magnetic circuit system 3 are respectively arranged opposite to and spaced apart from the diaphragm assembly 21 of the vibration system 2.

[0031] Understandable, such as Figures 1 to 9 As shown, the outer shell 1 has a cavity, and both the vibration system 2 and the magnetic circuit system 3 are disposed within the cavity of the outer shell 1. The first magnetic circuit component 33 and the second magnetic circuit component 34 of the magnetic circuit system 3 are respectively disposed on opposite sides of the diaphragm assembly 21 and are positioned opposite to the diaphragm assembly 21. It should be noted that the outer shell 1 can be a single integral structure or formed by the combination of multiple separate structures; no limitation is made here. To facilitate the assembly of the vibration system 2 and the magnetic circuit system 3, the outer shell 1 in this embodiment can be selected as a separate structure.

[0032] In one implementation, such as Figures 1 to 9 As shown, the outer shell 1 includes a first shell 13 and a second shell 14, which are connected by a mating joint. It is understood that one of the first shell 13 and the second shell 14 may be a U-shaped structure or a flat plate structure; or both the first shell 13 and the second shell 14 may be U-shaped structures; or both the first shell 13 and the second shell 14 may be flat plate structures, which is not limited here.

[0033] Understandably, the sound-generating device 100 is used in electronic devices, meaning that the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a separate housing or enclosure structure from the electronic device. In this case, the housing 1 integrates the magnetic circuit system 3 and vibration system 2 of the sound-generating device 100 into a single structure, facilitating assembly and disassembly. Alternatively, the housing 1 of the sound-generating device 100 can be integrally molded with the housing or enclosure structure of the electronic device, which effectively improves structural strength and sealing performance.

[0034] In this embodiment, the outer shell 1 is used to house the fixed vibration system 2 and magnetic circuit system 3, etc., so that the sound generating device 100 can be used as an independent component in electronic devices or sound generating modules, which is not limited here. Of course, in other embodiments, the sound generating device 100 can also be a module structure, in which case the vibration system 2 and magnetic circuit system 3 of the sound generating unit are installed as multiple independent components on the outer shell 1 of the module structure, which is not limited here.

[0035] Optionally, the sound-generating device 100 is rectangular. In this embodiment, the housing 1 of the sound-generating device 100 is optionally rectangular. It should be noted that, as Figures 1 to 9 As shown, in a specific example, the vibration direction of the vibration system 2 of the sound-generating device 100 is the first direction (that is, the thickness direction of the sound-generating device 100), the short side direction of the sound-generating device 100 (that is, the width direction of the sound-generating device 100) is the second direction, and the long side direction of the sound-generating device 100 (that is, the length direction of the sound-generating device 100) is the third direction. At this time, the first direction, the second direction and the third direction are perpendicular to each other.

[0036] In this embodiment, the first direction is the thickness direction or Z-direction of the sound-generating device 100, the vibration system 2 vibrates along the first direction (e.g., the vertical direction), the second direction is the width direction or Y-direction of the sound-generating device 100, and the third direction is the length direction or X-direction of the sound-generating device 100.

[0037] Understandable, such as Figures 2 to 8 , Figure 10 As shown, the top of the voice coil 22 is connected to the diaphragm assembly 21, and the bottom of the voice coil 22 is suspended at one end of the magnetic gap 334. The first magnetic circuit assembly 33 of the magnetic circuit system 3 is located on the side near the bottom of the voice coil 22, and the second magnetic circuit assembly 34 is located on the side near the top of the voice coil 22.

[0038] In this embodiment, as Figures 2 to 8As shown, by disposing the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 of the magnetic circuit system 3 on opposite sides of the diaphragm assembly 21 along the first direction, the first side magnetic portion 332 of the first magnetic circuit assembly 33 is located outside the first central magnetic portion 331 and spaced apart from the first central magnetic portion 331 to form a magnetic gap 334. The end of the voice coil 22 away from the first plate portion 2121 is suspended in the magnetic gap 334, and the second side magnetic portion 342 of the second magnetic circuit assembly 34 is located outside the second central magnetic portion 341, thus aligning the voice coil 2... A current is passed through the magnetic circuit 3, causing the voice coil 22 to reciprocate within the magnetic field formed by the magnetic circuit system 3. This reciprocates the motion of the diaphragm assembly 21 along the first direction, thereby pushing the air to produce sound. The first central magnet 331 and the second central magnet 341 are both magnetized along the first direction but in opposite directions, forming a magnetically opposed structure. Furthermore, the first central magnet 331 and the first side magnet 332 are both magnetized along the first direction but in opposite directions, while the second side magnet 342 is magnetized along a direction perpendicular to the first direction. The direction of magnetization is such that the magnetic pole of the second side magnetic part 342 near the second central magnetic part 341 has the same polarity as the magnetic pole of the second central magnetic part 341 facing the second plate part 2122. This allows the first central magnetic part 331 and the first side magnetic part 332 to form a magnetic circuit passing through the voice coil 22 located within the magnetic gap 334. The second central magnetic part 341 and the second side magnetic part 342 cooperate to form a magnetic circuit passing through the voice coil 22. This not only effectively increases the magnet volume of the magnetic circuit system 3 using the second magnetic circuit assembly 34, but also utilizes the... The first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 on opposite sides of the diaphragm assembly 21 work together to increase the magnetic field strength in the area where the voice coil 22 is located, thereby increasing the magnetic induction intensity of the sound generating device 100 and thus increasing the magnetic force on the voice coil 22. This can increase the BL value of the sound generating device 100. Even when the voice coil 22 moves to the side away from the magnetic gap 334, the magnetic force on the voice coil 22 will be increased under the action of the second magnetic circuit assembly 34, thereby increasing the sound generation sensitivity, improving the sound quality, and improving the acoustic performance of the sound generating device 100.

[0039] At the same time, such as Figures 2 to 11As shown, by configuring the diaphragm assembly 21's vibrating plate 212 as a first plate portion 2121 and a second plate portion 2122 located on different horizontal planes along a first direction, the top of the voice coil 22 is connected to the first plate portion 2121, the second plate portion 2122 is located inside the voice coil 22, and the outer periphery of the second plate portion 2122 abuts against the inner peripheral wall of the voice coil 22. This allows the second plate portion 2122 to cooperate with the voice coil 22 inside the voice coil 22, forming two accommodating spaces within the second plate portion 2122. The first central magnet portion 331 and the second central magnet portion 341 are arranged opposite each other along the first direction, so that the projections of the first central magnet portion 331 and the second central magnet portion 341 along the first direction are both located inside the voice coil 22. Thus, during the movement of the diaphragm assembly 21, the sound... The voice coil 22 and the second plate 2122 cooperate to form two accommodating spaces on opposite sides of the second plate 2122, providing clearance for the first central magnet 331 and the second central magnet 341. This allows the first central magnet 331 and the second central magnet 341 to be closer to the voice coil 22, thereby enhancing the magnetic field. This effectively solves the problem of insufficient magnetic force when the voice coil 22 moves away from the magnetic gap 334 during the reciprocating motion of the voice coil, which affects the acoustic performance. At the same time, the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 on opposite sides of the diaphragm assembly 21 respectively form magnetic circuits passing through the voice coil 22. This not only increases the magnet volume and improves the BL value, but also makes the magnetic field lines more evenly distributed and the BLx curve flatter, thereby reducing distortion and improving the acoustic performance of the sound-generating device 100.

[0040] Optionally, the second side magnet 342 and the second center magnet 341 are disposed abutting against each other. In this embodiment, the outer periphery of the second center magnet 341 is disposed tightly against the inner side of the second side magnet 342. It should be noted that when the second side magnet 342 and the second center magnet 341 are assembled tightly against each other, a gap or gap may exist between the second side magnet 342 and the second center magnet 341 due to assembly tolerances or errors. This gap or gap is an assembly gap or gap. That is, there is a gap between the second side magnet 342 and the second center magnet 341. Optionally, the width of the gap is not greater than 0.02 mm. It should be noted that the width of the gap is the distance between the outer periphery of the second center magnet 341 and the inner side of the second side magnet 342, and is not limited here.

[0041] In this embodiment, no separate gap is provided between the second side magnet 342 and the second central magnet 341. It is understood that by abutting the second side magnet 342 and the second central magnet 341, and by magnetizing the second side magnet 342 in a direction perpendicular to the first direction, and by ensuring that the magnetic pole of the second side magnet 342 near the second central magnet 341 has the same polarity as the magnetic pole of the second central magnet 341 facing the second plate 2122, the magnetic field lines generated by the second central magnet 341 pass through the voice coil 22 due to the repulsive force of the first central magnet 331. Through the magnetizing effect of the second housing 14 and the magnetization direction of the second side magnet 342, the second central magnet 341 and the second side magnet 342 cooperate to form a magnetic circuit passing through the voice coil 22, thereby increasing the magnetic field strength. This not only increases the magnet volume of the magnetic circuit system 3 but also effectively improves the BL value of the sound-generating device 100.

[0042] In one embodiment, the projection of the second side magnetic portion 342 along the first direction at least partially coincides with the projection of the magnetic gap 334 along the first direction.

[0043] In this embodiment, as Figure 2 , Figures 4 to 8 As shown, by placing the second side magnetic part 342 outside the second central magnetic part 341, and making the second side magnetic part 342 abut against the second central magnetic part 341, and ensuring that the projection of the second side magnetic part 342 along the first direction at least partially overlaps with the projection of the magnetic gap 334 along the first direction, the second side magnetic part 342 and the second housing 14 can further guide the magnetic field lines of the second central magnetic part 341, allowing the second central magnetic part 341 and the second side magnetic part 342 to cooperate in forming a magnetic circuit, allowing more magnetic field lines to pass through. By passing through the voice coil 22, the problem of insufficient magnetic force when the voice coil 22 is far from the magnetic gap 334, which would affect the acoustic performance, is ensured. At the same time, the arrangement of the second central magnetic part 341 and the second side magnetic part 342 effectively increases the magnet volume of the magnetic circuit system 3, improves the BL value, and, together with the magnetic field formed by the first central magnetic part 331 and the first side magnetic part 332 of the first magnetic circuit assembly 33 located at the bottom of the voice coil 22, makes the magnetic field lines more evenly distributed and the BLx curve flatter, thereby reducing distortion and improving the acoustic performance of the sound generating device 100.

[0044] It is understandable that the projection of the second magnetic part 342 along the first direction and the projection of the magnetic gap 334 along the first direction at least partially coincide, that is, the second magnetic part 342 and the magnetic gap 334 are arranged facing each other along the first direction, which is not limited here.

[0045] Optionally, the voice coil 22 is an annular voice coil. In this embodiment, the voice coil 22 extends along a first direction. The diaphragm 212 is thus configured as a first plate portion 2121 and a second plate portion 2122 located on different horizontal planes along the first direction, such that the top of the voice coil 22 is connected to the first plate portion 2121, i.e., the voice coil 22 is fixed using the first plate portion 2121. The second plate portion 2122 is located inside the voice coil 22, and its outer periphery abuts against the inner peripheral wall of the voice coil 22. The first plate portion 2121 and the second plate portion 2122 on different horizontal planes can achieve a centering effect on the vibration of the voice coil 22. Simultaneously, during the vibration of the voice coil 22, the voice coil 22 and the second plate portion 2122 cooperate to provide accommodating space for the first central magnet portion 331 and the second central magnet portion 341, ensuring the normal operation of the sound-generating device 100.

[0046] In one embodiment, the outer shell 1 includes a first shell 13 and a second shell 14 disposed opposite to each other. The sound-generating device 100 also includes a bracket 5. The outer periphery of the diaphragm assembly 21 is connected to the bracket 5. The bracket 5 is connected to the first shell 13 and the second shell 14 respectively and is located between the first shell 13 and the second shell 14. A first cavity 11 is formed between the diaphragm assembly 21 and the first shell 13. A second cavity 12 is formed between the diaphragm assembly 21 and the second shell 14. A first magnetic circuit assembly 33 is disposed in the first cavity 11. The first central magnetic part 331 and the first side magnetic part 332 are connected to the first shell 13 on the side facing away from the diaphragm assembly 21. A second magnetic circuit assembly 34 is disposed in the second cavity 12. The second central magnetic part 341 and the second side magnetic part 342 are connected to the second shell 14 on the side facing away from the diaphragm assembly 21.

[0047] In this embodiment, as Figures 1 to 9 As shown, by setting the bracket 5, the diaphragm assembly 21 can be conveniently installed and fixed using the bracket 5, and the bracket 5 can also support and fix the first shell 13 and the second shell 14 of the outer casing 1. It is understood that the bracket 5 can be a frame or a cylindrical structure extending along the first direction, etc., and is not limited here.

[0048] Optionally, such as Figure 1 and Figure 9 As shown, the bracket 5 has two first sides extending along a second direction and two second sides extending along a third direction. The two first sides and two second sides of the bracket 5 are connected end to end to form a square frame structure.

[0049] In this embodiment, the diaphragm assembly 21 of the vibration system 2 may optionally be square in shape. The outer periphery of the diaphragm assembly 21 is connected to the support 5. It can be understood that... Figures 1 to 9As shown, by providing a first housing 13 and a second housing 14 to the outer casing 1, the first housing 13 and the second housing 14 are arranged opposite to each other, so that the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 can be installed and fixed by the first housing 13 and the second housing 14 respectively.

[0050] To further simplify the structure while converging the magnetic lines of force of the first magnetic circuit component 33 and the second magnetic circuit component 34 of the magnetic circuit system 3 to form a magnetic loop, in this embodiment, the first housing 13 and the second housing 14 can be made of a magnetically conductive material. It is understood that the first housing 13 and the second housing 14 are formed using a magnetically conductive plate material.

[0051] Understandably, the first housing 13 and the second housing 14 are arranged opposite each other along the first direction. The bracket 5 is connected to the first housing 13 and the second housing 14 respectively, so that the first housing 13, the bracket 5 and the second housing 14 enclose a cavity. The vibration system 2 is located in the cavity, and the outer periphery of the diaphragm assembly 21 in the vibration system 2 is connected to the bracket 5. In this way, the vibration system 2 divides the cavity into a first cavity 11 and a second cavity 12. At this time, the first cavity 11 is formed between the diaphragm assembly 21 and the first housing 13, and the second cavity 12 is formed between the diaphragm assembly 21 and the second housing 14.

[0052] In this embodiment, as Figures 2 to 8 As shown, the first magnetic circuit assembly 33 is disposed within the first cavity 11. The first central magnetic part 331 and the first side magnetic part 332 of the first magnetic circuit assembly 33 are connected to the first housing 13 on the side facing away from the diaphragm assembly 21. The second magnetic circuit assembly 34 is disposed within the second cavity 12. The second central magnetic part 341 and the second side magnetic part 342 of the second magnetic circuit assembly 34 are connected to the second housing 14 on the side facing away from the diaphragm assembly 21. In this way, the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 can be installed and fixed using the first housing 13 and the second housing 14 respectively. The first housing 13 and the second housing 14 can also have a magnetic focusing effect on the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 respectively, so that the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 form magnetic circuits respectively, and the magnetic field lines of the two magnetic circuits pass through the voice coil 22 more.

[0053] Optionally, the projected area of ​​the first housing 13 along the first direction is greater than or equal to the projected area of ​​the first magnetic circuit assembly 33 along the first direction, and the projected area of ​​the second housing 14 along the first direction is greater than or equal to the projected area of ​​the second magnetic circuit assembly 34 along the first direction. In this embodiment, both the first housing 13 and the second housing 14 are made of magnetically conductive material, thus effectively achieving magnetic conductivity and magnetic focusing properties.

[0054] In this embodiment, the first cavity 11 is the rear acoustic cavity of the sound-generating device 100, and the second cavity 12 is the front acoustic cavity of the sound-generating device 100. To ensure that the sound emitted by the diaphragm assembly 21 vibrates smoothly and is transmitted to the outside, the sound-generating device 100 is provided with an outlet 143 communicating with the second cavity 12. This facilitates the radiation of the sound emitted by the diaphragm assembly 21 through the outlet 143.

[0055] It is understandable that the sound outlet 143 is provided on the bracket 5 and / or the second housing 14. For example, the second housing 14 is provided with a sound outlet 143 communicating with the second cavity 12; or, the bracket 5 is provided with a sound outlet 143 communicating with the second cavity 12; or, the bracket 5 and the second housing 14 cooperate to form a sound outlet 143 communicating with the second cavity 12.

[0056] Optionally, the sound outlet 143 may include multiple outlets. Understandably, by providing multiple outlets 143, the sound wave airflow within the second cavity 12 can be smoothly radiated outward, thereby reducing the sound quality and improving the acoustic performance of the sound-generating device 100.

[0057] In one embodiment, the first housing 13 and the second housing 14 can be flat plate structures. In this case, the support 5 extends along a first direction, and its two ends along the first direction are respectively connected to the first housing 13 and the second housing 14. It is understood that the support 5 can be a square cylindrical structure along the first direction; or, the support 5 can be a split structure, that is, the support 5 includes a first support and a second support arranged sequentially along the first direction, with the end of the first support away from the second support connected to the first housing 13, and the end of the second support away from the first support connected to the second housing 14. Optionally, the outer periphery of the diaphragm assembly 21 is sandwiched between the first support and the second support, which is not limited here.

[0058] It is understood that the bracket 5 is integrally formed with the first housing 13 and / or the second housing 14. When the bracket 5 is an integral structure, it is integrally formed with the first housing 13 or the second housing 14. When the bracket 5 is a separate structure, it may include a separately configured first bracket and a second bracket. Optionally, the first bracket and the first housing 13 are integrally formed, and the second bracket and the second housing 14 are integrally formed; this is not limited here.

[0059] Optionally, the bracket 5 can be a metal bracket or an injection-molded bracket. It should be noted that when the bracket 5 is a metal bracket, the bracket 5 and the first housing 13 and / or the second housing 14 are integrally stretched and formed. When the bracket 5 is an injection-molded bracket, the bracket 5 and the first housing 13 and / or the second housing 14 are integrally injection-molded; this is not limited here.

[0060] Of course, in other embodiments, the bracket 5 is a separate structure from the first housing 13 and / or the second housing 14. For example, the bracket 5 is welded or bonded to the first housing 13 and / or the second housing 14, which is not limited here. Optionally, the bracket 5 is a metal part, and the bracket 5 is welded to the first housing 13 and the second housing 14 respectively. Optionally, the bracket 5 is a plastic part, and the bracket 5 is bonded to the first housing 13 and the second housing 14 respectively, which is not limited here.

[0061] It should be noted that the bracket 5 can be a frame structure or frame with openings at both ends. In this case, the first housing 13 is connected to one end of the bracket 5, and the second housing 14 is located at the end of the bracket 5 away from the first housing 13. Of course, in other embodiments, the bracket 5 includes a straight part and a vertical part arranged at an angle. The straight part has an installation opening, the first housing 13 is located at the installation opening, and the second housing 14 is located on the side of the vertical part of the outer shell 1 facing away from the straight part. This is not limited here.

[0062] In another embodiment, the first housing 13 / second housing 14 includes a flat plate portion and a side plate portion disposed around the periphery of the flat plate portion. The side plate portion and the flat plate portion are disposed at an angle, such that the side plate portion and the flat plate portion enclose and form an accommodating groove.

[0063] In this embodiment, as Figures 1 to 9 As shown, the first housing 13 includes a first flat plate portion 131 and a first side plate portion 132 disposed around the periphery of the first flat plate portion 131 and extending toward the bracket 5. The end of the first side plate portion 132 away from the first flat plate portion 131 is connected to the bracket 5. The second housing 14 includes a second flat plate portion 141 and a second side plate portion 142 disposed around the periphery of the second flat plate portion 141 and extending toward the bracket 5. The end of the second side plate portion 142 away from the second flat plate portion 141 is connected to the bracket 5.

[0064] Understandably, the first side plate portion 132 of the first housing 13 may be disposed around the periphery of the first flat plate portion 131. Of course, in other embodiments, there may be multiple first side plate portions 132, spaced apart and disposed around the periphery of the first flat plate portion 131; this is not limited here. Similarly, the second side plate portion 142 of the second housing 14 may be disposed around the periphery of the second flat plate portion 141. Of course, in other embodiments, there may be multiple second side plate portions 142, spaced apart and disposed around the periphery of the second flat plate portion 141; this is not limited here.

[0065] In this embodiment, the first side plate portion 132 and the first flat plate portion 131 of the first housing 13 can be made of the same material or different materials. It is understood that at least the first flat plate portion 131 of the first housing 13 can be made of a magnetically conductive material. Optionally, the projected area of ​​the first flat plate portion 131 along the first direction is greater than or equal to the projected area of ​​the first magnetic circuit assembly 33 along the first direction.

[0066] It should be noted that the first side plate portion 132 and the first flat plate portion 131 of the first housing 13 can both be made of magnetically conductive material. In this case, the first side plate portion 132 and the first flat plate portion 131 are made of the same material. To facilitate processing and maintain good structural strength and sealing, the first side plate portion 132 and the first flat plate portion 131 of the first housing 13 can be formed into an integral structure by integral stretching molding. Of course, the first side plate portion 132 and the first flat plate portion 131 of the first housing 13 can also be made of different materials. In this case, the first side plate portion 132 is made of injection molded material, and the first flat plate portion 131 is made of magnetically conductive material. The first side plate portion 132 and the first flat plate portion 131 of the first housing 13 can be formed by integral injection molding, which is not limited here.

[0067] In this embodiment, the second side plate portion 142 and the second flat plate portion 141 of the second housing 14 can be made of the same material or different materials. It is understood that at least the second flat plate portion 141 of the second housing 14 can be made of a magnetically conductive material. Optionally, the projected area of ​​the second flat plate portion 141 along the first direction is greater than or equal to the projected area of ​​the second magnetic circuit assembly 34 along the first direction.

[0068] It should be noted that the second side plate portion 142 and the second flat plate portion 141 of the second housing 14 can both be made of magnetically conductive material. In this case, the second side plate portion 142 and the second flat plate portion 141 are made of the same material. To facilitate processing and maintain good structural strength and sealing, the second side plate portion 142 and the second flat plate portion 141 of the second housing 14 can be formed into an integral structure by a one-piece stretching molding method. Of course, the second side plate portion 142 and the second flat plate portion 141 of the second housing 14 can also be made of different materials. In this case, the second side plate portion 142 is made of injection molded material, and the second flat plate portion 141 is made of magnetically conductive material. The second side plate portion 142 and the second flat plate portion 141 of the second housing 14 can be formed by an integral injection molding method, which is not limited here.

[0069] Optionally, the outer periphery of the diaphragm assembly 21 is sandwiched between the second side plate portion 142 and the bracket 5. In this embodiment, as... Figures 2 to 8 As shown, by clamping the outer periphery of the diaphragm assembly 21 between the second side plate portion 142 and the bracket 5, the installation stability of the vibration system 2 can be improved, while ensuring the sealing of the first cavity 11 and the second cavity 12.

[0070] Of course, in other embodiments, the bracket 5 may not be provided. In this case, the first housing 13 and the second housing 14 of the outer shell 1 are connected to each other, and the outer periphery of the diaphragm assembly 21 is sandwiched between the first side plate portion 132 and the second side plate portion 142. This is not limited here.

[0071] In this embodiment, the sound outlet 143 is disposed on the second flat plate portion 141 and / or the second side plate portion 142 of the second housing 14. It should be noted that when the sound outlet 143 is disposed on the second flat plate portion 141 of the second housing 14 and faces the diaphragm 211, the sound-generating device 100 is applied to an electronic device or a sound-generating module. In this case, the housing of the electronic device or the sound-generating module has a sound outlet hole directly opposite the sound outlet 143, thus making the electronic device or the sound-generating module have a front-emitting sound structure. Alternatively, the sound outlet hole on the housing of the electronic device or the sound-generating module is located on one side of the sound-generating device 100, so that the sound outlet hole communicates with the sound outlet 143 through a sound outlet channel, thereby making the electronic device or the sound-generating module have a side-emitting sound structure.

[0072] Of course, when the sound outlet 143 is located on the second side plate portion 142 of the second housing 14, the sound generating device 100 is applied to the electronic device or the sound generating module. At this time, the sound outlet hole on the housing of the electronic device or the sound generating module is directly connected to the sound outlet 143 or connected to the sound outlet 143 through the sound outlet channel, so that the electronic device or the sound generating module has a side sound output structure.

[0073] Optionally, such as Figure 1 and Figure 9 As shown, the second side panel 142 is provided with a sound outlet 143, which is not limited here.

[0074] In order to further improve the connection strength between the first housing 13 and the second housing 14 and the bracket 5, in one embodiment, the sound-generating device 100 further includes a welding part 4, which extends along a first direction. One end of the welding part 4 is welded to the first housing 13, and the other end of the welding part 4 is welded to the second housing 14.

[0075] In this embodiment, as Figures 1 to 9 As shown, the welding part 4 can be a welding piece or welding plate extending along the first direction, etc., and is not limited here. It is understood that the two ends of the welding part 4 are welded to the first housing 13 and the second housing 14 respectively, and is not limited here. Optionally, there are multiple welding parts 4, and the multiple welding parts 4 are spaced apart along the circumferential direction of the outer shell 1.

[0076] Of course, in other embodiments, the outer periphery of the first housing 13 bends and extends toward the second housing 14 to form a first welded portion, and the first welded portion is welded to the outer periphery of the second housing 14. And / or, the outer periphery of the second housing 14 bends and extends toward the first housing 13 to form a second welded portion, and the second welded portion is welded to the outer periphery of the first housing 13.

[0077] Understandably, the first housing 13 and the second housing 14 are welded together via the first welding portion / second welding portion, thereby improving connection stability. This ensures the structural stability of the sound-generating device 100 when it is applied to electronic devices, even in the event of drops or other incidents. Optionally, multiple first welding portions / second welding portions are provided, spaced apart on the outer periphery of the first housing 13 / second housing 14, and all are welded to the outer periphery of the second housing 14 / first housing 13. This is not limited to any particular type.

[0078] To further improve the connection stability between the first central magnet 331 and the first side magnet 332 of the first magnetic circuit assembly 33 and the first housing 13, in one embodiment, the first housing 13 is provided with first recessed grooves corresponding to the first central magnet 331 and the first side magnet 332, respectively, with the first central magnet 331 and the first side magnet 332 respectively disposed within the first recessed grooves. It is understood that this arrangement allows for the positioning and installation of the first central magnet 331 and the first side magnet 332 using the first recessed grooves, improving installation stability. Furthermore, it reduces the assembly height between the first central magnet 331 and the first side magnet 332 and the first housing 13, increasing the vibration space of the diaphragm assembly 21.

[0079] Understandably, in order to further improve the connection stability between the second central magnet 341 and the second side magnet 342 of the second magnetic circuit assembly 34 and the second housing 14, in one embodiment, the second housing 14 is provided with second recessed grooves corresponding to the second central magnet 341 and the second side magnet 342, respectively, with the second central magnet 341 and the second side magnet 342 respectively disposed within the second recessed grooves. Understandably, this arrangement allows for the positioning and installation of the second central magnet 341 and the second side magnet 342 using the second recessed grooves, improving installation stability. Furthermore, it can reduce the assembly height between the second central magnet 341 and the second side magnet 342 and the second housing 14, increasing the vibration space of the diaphragm assembly 21.

[0080] In the first embodiment, the first central magnetic part 331 includes a first central magnet 3311, the first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic plate 3322 stacked together, the second central magnetic part 341 includes a second central magnet 3411, and the second side magnetic part 342 includes a second side magnet 3421; wherein the sides of the first central magnet 3311, the second central magnet 3411, and the second side magnet 3421 facing the diaphragm assembly 21 are all exposed in the internal cavity of the sound generating device 100.

[0081] In this embodiment, as Figure 2 and Figure 3As shown, the first central magnet 331 consists only of the first central magnet 3311, the second central magnet 341 consists only of the second central magnet 3411, and the second side magnet 342 consists only of the second side magnet 3421. In this configuration, the side of the first central magnet 3311 facing the diaphragm assembly 21 is exposed within the internal cavity of the sound-generating device 100, i.e., within the first cavity 11. The sides of the second central magnet 3411 and the second side magnet 3421 facing the diaphragm assembly 21 are both exposed within the internal cavity of the sound-generating device 100, i.e., within the second cavity 12.

[0082] Understandably, the first central magnet 3311 and the first side magnet 3321 are both connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are both connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0083] In this embodiment, as Figure 2As shown, the first central magnet 331 and the first side magnet 3321 are both magnetized along the first direction but in opposite directions, thus forming a magnetic circuit. The second central magnet 3411 and the first central magnet 331 are both magnetized along the first direction but in opposite directions. The second side magnet 3421 is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the second side magnet 3421 near the second central magnet 3411 has the same polarity as the magnetic pole of the second central magnet 3411 facing the second plate 2122. This causes the magnetic field lines generated by the second central magnet 3411 to pass through the voice coil 22 due to the repulsive force of the first central magnet 331, and then through the second housing 14. The magnetic focusing effect and the magnetization direction of the second side magnet 3421 cause the second center magnet 3411 and the second side magnet 3421 to cooperate in forming a magnetic circuit passing through the voice coil 22, and the magnetic field lines of both magnetic circuits pass through the voice coil 22 in the same direction. At the same time, the magnetic focusing effect of the first side magnetic plate 3322 guides more magnetic field lines of the two magnetic circuits to pass through the voice coil 22, which can increase the magnetic field strength in the area where the voice coil 22 is located, and also improve the flatness of the BLx curve. Even when the voice coil 22 moves to the side away from the magnetic gap 334, the magnetic force on the voice coil 22 will be increased under the action of the two magnetic circuits, thereby improving the sound sensitivity, improving the sound quality, and improving the acoustic performance of the sound-generating device 100. Meanwhile, the first center magnet 3311 and the second center magnet 3411 are both magnetized in the first direction but in opposite directions, so that the first center magnet 3311 and the second center magnet 3411 form a magnetically opposed structure. The magnetic lines of force generated by the first central magnet 3311 and the second central magnet 3411 repel each other and are transmitted to the outside of the voice coil 22. Through the magnetic focusing effect of the first side magnetic plate 3322 and the magnetic focusing effect of the second housing 14, as well as the influence of the magnetization direction of the second side magnet 3421, the magnetic lines of force are more evenly distributed. When the voice coil 22 vibrates back and forth along the first direction, it can be in a dense magnetic field region, which makes the BLx curve flatter and reduces distortion.

[0084] Understandably, the sides of the first central magnet 3311, the second central magnet 3411, and the second side magnet 3421 facing the diaphragm assembly 21 are all exposed within the internal cavity of the sound-generating device 100. Compared to the magnetic circuit structure of a conventional loudspeaker, the first central magnet 3311, the second central magnet 3411, and the second side magnet 3421 of this invention eliminate the washer (or magnetic guide plate) structure, thereby reducing the thickness of the sound-generating device 100 in the Z direction. Furthermore, given a fixed thickness of the sound-generating device 100, the elimination of the washer (or magnetic guide plate) structure in the first central magnet 3311, the second central magnet 3411, and the second side magnet 3421 allows for an effective increase in the volume of the magnets in the magnetic circuit system 3, thereby improving the BL value.

[0085] Optionally, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction.

[0086] In this embodiment, as Figure 2 and Figure 3 As shown, the outer contours of the first central magnet 3311 and the second central magnet 3411 are the same, and the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. This results in the magnetic field strength of the first central magnet 3311 being less than or equal to the magnetic field strength of the second central magnet 3411.

[0087] Understandably, the first side magnet 3321 is located outside the first center magnet 3311, so that the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is greater than the magnetic field strength of the first center magnet 3311. By setting the magnetic energy product of the second center magnet 3411 to be greater than or equal to the magnetic energy product of the first center magnet 3311, the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is comparable to the magnetic field strength formed by the second center magnet 3411 and the second side magnet 3421. This can balance the magnetic field strength at both ends of the voice coil 22, further improve the flatness of the BLx curve, and thus reduce distortion.

[0088] Optionally, the amplitude of the vibration system 2 is less than or equal to the thickness of the first central magnet 3311 along the first direction. In this embodiment, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. By making the amplitude of the vibration system 2 less than or equal to the thickness of the first central magnet 3311 along the first direction, it can be ensured that the diaphragm assembly 21 of the vibration system 2 avoids interference with the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 when it vibrates.

[0089] In one embodiment, along the first direction, the distance from the side of the second plate portion 2122 facing the first central magnet 3311 to the first central magnet 3311 is the same as the distance from the side of the second plate portion 2122 facing the second central magnet 3411 to the second central magnet 3411.

[0090] In this embodiment, as Figure 2 , Figure 3 As shown, the second plate portion 2122 has a first surface facing the first central magnet 3311 and a second surface facing the second central magnet 3411. Optionally, the distance from the first surface to the first central magnet 3311 is the same as the distance from the second surface to the second central magnet 3411. This ensures that when the voice coil 22 drives the second plate portion 2122 to vibrate in the first direction, collision interference between the second plate portion 2122 and the first and second central magnets 3311 can be effectively avoided.

[0091] Optionally, the projection of the second plate portion 2122 along the direction perpendicular to the first direction is located at the middle of the voice coil 22. In this embodiment, the second plate portion 2122 is located at the middle position of the voice coil 22 along the first direction.

[0092] In one embodiment, the thickness of the second side magnet 3421 along the first direction is less than or equal to half the thickness of the second center magnet 3411 along the first direction.

[0093] In this embodiment, as Figure 2 As shown, by setting the thickness of the second side magnet 3421 along the first direction to be less than or equal to 1 / 2 the thickness of the second center magnet 3411 along the first direction, it is possible not only to ensure that the magnet volume of the magnetic circuit system 3 is increased and the BL value is improved, but also that the second side magnet 3421 does not occupy too much volume of the second cavity 12, and can also ensure that the sound waves radiated by the diaphragm assembly 21 into the second cavity 12 can flow smoothly, thereby reducing the sound quality and improving the acoustic performance of the sound generating device 100.

[0094] In one embodiment, the projection of the first side magnetic plate 3322 perpendicular to the first direction is located between the top and bottom of the voice coil 22.

[0095] In this embodiment, when the sound-generating device 100 is not working, that is, when the voice coil 22 is not vibrating, the projection of the first side magnetic plate 3322 along the direction perpendicular to the first direction is located between the top and bottom of the voice coil 22. This ensures that the voice coil 22 can repeatedly approach the first central magnet 3311 or the second central magnet 3411 during vibration, thereby ensuring that the magnetic force experienced by the voice coil 22 remains unchanged or changes very little when it moves to the side away from the magnetic gap 334, and makes the magnetic field lines of the magnetic circuit system 3 more uniformly distributed and the BLx curve flatter, thereby reducing distortion.

[0096] It should be noted that, under small amplitude conditions, the projection of the first side magnetic plate 3322 perpendicular to the first direction is located between the top and bottom of the voice coil 22. However, under large amplitude conditions, the projection of the first side magnetic plate 3322 perpendicular to the first direction is located between the top and bottom of the voice coil 22 only when the voice coil 22 is not vibrating; this is not a limitation.

[0097] In one embodiment, the projection of the first side magnetic plate 3322 along a direction perpendicular to the first direction is located between the surfaces of the first central magnet 3311 and the second central magnet 3411 facing the diaphragm assembly 21.

[0098] In this embodiment, as Figure 2 and Figure 3 As shown, by projecting the first side magnetic plate 3322 of the first side magnetic part 332 along a direction perpendicular to the first direction, it is positioned between the surfaces of the first center magnet 3311 and the second center magnet 3411 facing the diaphragm assembly 21. This ensures that the first side magnetic plate 3322 can both magnetically guide the magnetic field lines of the magnetic circuit formed by the first center magnet 3311 and the first side magnet 3321 through the voice coil 22, and also magnetically guide the magnetic field lines of the magnetic circuit formed by the second center magnet 3411 and the second side magnet 3421 through the voice coil 22. This allows more magnetic field lines to pass through the voice coil 22, thereby increasing the magnetic field strength, effectively improving the BL value, making the magnetic field line distribution more uniform, and the BLx curve flatter, thus reducing distortion.

[0099] Optionally, the thickness of the first side magnet 3321 along the first direction is greater than or equal to the thickness of the first center magnet 3311 along the first direction. In this embodiment, by setting the thickness of the first side magnet 3321 along the first direction to be greater than or equal to the thickness of the first center magnet 3311 along the first direction, it is ensured that the projection of the first side magnetic plate 3322 perpendicular to the first direction is positioned between the surfaces of the first center magnet 3311 and the second center magnet 3411 facing the diaphragm assembly 21. It should also be noted that the magnetic field strength of the magnetic circuit formed by the first center magnet 3311 and the first side magnet 3321 is comparable to the magnetic field strength of the magnetic circuit formed by the second center magnet 3411 and the second side magnet 3421.

[0100] In one embodiment, the sound-generating device 100 further includes a bracket 5 connected to the housing 1, the outer periphery of the diaphragm assembly 21 is fixed to the bracket 5, and the bracket 5 and the first side magnetic plate 3322 are integrally formed.

[0101] Optionally, the bracket 5 and the first side magnetic plate 3322 are integrally formed. In this embodiment, the first side magnetic plate 3322 of the first side magnetic part 332 and the bracket 5 can be integrally formed. For example, the bracket 5 is a plastic bracket, and the bracket 5 and the first side magnetic plate 3322 are integrally injection molded; or, the bracket 5 is a metal bracket, in which case the bracket 5 and the first side magnetic plate 3322 are integrally stretched and formed, which is not limited here. Of course, in other embodiments, the bracket 5 and the first side magnetic plate 3322 can also be connected by welding or bonding, which is not limited here.

[0102] It should be noted that the bracket 5 is used to fix the vibration system 2 and to support the first housing 13 and the second housing 14, so that the first housing 13 and the second housing 14 are arranged opposite each other and spaced apart.

[0103] In the second embodiment, the first central magnetic part 331 includes a first central magnet 3311 and a first central magnetic plate 3312 stacked together, the first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic plate 3322 stacked together, the second central magnetic part 341 includes a second central magnet 3411, and the second side magnetic part 342 includes a second side magnet 3421; wherein, the side of the second central magnet 3411 and the side magnet 3421 facing the diaphragm assembly 21 are both exposed in the internal cavity of the sound generating device 100.

[0104] In this embodiment, as Figure 4 As shown, the second central magnet 341 consists only of the second central magnet 3411, and the second side magnet 342 consists only of the second side magnet 3421. At this time, the side of the second central magnet 3411 and the side magnet 3421 facing the diaphragm assembly 21 are both exposed in the internal cavity of the sound generating device 100, that is, exposed in the second cavity 12.

[0105] Understandably, the first central magnet 3311 and the first side magnet 3321 are both connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are both connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0106] It should be noted that, compared with the first embodiment, the second embodiment provides a first central magnetic guide plate 3312 on the first central magnet 3311. While maintaining the same functions and effects, the second embodiment further utilizes the first central magnetic guide plate 3312 in conjunction with the first side magnetic guide plate 3322 to achieve a magnetic focusing effect. This allows more magnetic field lines to pass through the voice coil 22 in the same direction, forming a magnetic circuit with the first central magnet 3311 and the first side magnet 3321, and another magnetic circuit with the second central magnet 3411 and the second side magnet 3421. This increases the magnetic field strength in the region where the voice coil 22 is located and also improves the flatness of the BLx curve. Even when the voice coil 22 moves to a side away from the magnetic gap 334, the magnetic force on the voice coil 22 is increased under the action of the two magnetic circuits, thereby improving the sound sensitivity, enhancing the sound quality, and improving the acoustic performance of the sound-generating device 100. It is understood that the functions and effects of the second embodiment are the same as those of the first embodiment and will not be elaborated upon further.

[0107] In one embodiment, along the first direction, the distance from the side of the second plate portion 2122 facing the first central magnetic plate 3312 to the first central magnetic plate 3312 is the same as the distance from the side of the second plate portion 2122 facing the second central magnet 3411 to the second central magnet 3411.

[0108] In this embodiment, as Figure 4 As shown, the second plate portion 2122 has a first surface facing the first central magnetic plate 3312 and a second surface facing the second central magnet 3411. Optionally, the distance from the first surface to the first central magnetic plate 3312 is the same as the distance from the second surface to the second central magnet 3411. This ensures that when the voice coil 22 drives the second plate portion 2122 to vibrate in the first direction, collision interference between the second plate portion 2122 and the first central magnetic plate 3312 and the second central magnet 3411 can be effectively avoided.

[0109] Optionally, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction.

[0110] In this embodiment, as Figure 4 As shown, the first central magnet 3311 and the second central magnet 3411 have the same outer contour, and the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. This results in the magnetic field strength of the first central magnet 3311 being less than or equal to the magnetic field strength of the second central magnet 3411. Optionally, the first central magnet 3311 and the first central magnetic plate 3312 have the same outer contour and are both plate-shaped.

[0111] Understandably, the first side magnet 3321 is located outside the first center magnet 3311, so that the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is greater than the magnetic field strength of the first center magnet 3311. By setting the magnetic energy product of the second center magnet 3411 to be greater than or equal to the magnetic energy product of the first center magnet 3311, the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is comparable to the magnetic field strength formed by the second center magnet 3411 and the second side magnet 3421. This can balance the magnetic field strength at both ends of the voice coil 22, further improve the flatness of the BLx curve, and thus reduce distortion.

[0112] Optionally, the amplitude of the vibration system 2 is less than or equal to the thickness of the first central magnet 3311 along the first direction. In this embodiment, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. By making the amplitude of the vibration system 2 less than or equal to the thickness of the first central magnet 3311 along the first direction, it can be ensured that the diaphragm assembly 21 of the vibration system 2 avoids interference with the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 when it vibrates.

[0113] In one embodiment, the thickness of the second side magnet 3421 along the first direction is less than or equal to half the thickness of the second center magnet 3411 along the first direction.

[0114] In this embodiment, as Figure 4 As shown, by setting the thickness of the second side magnet 3421 along the first direction to be less than or equal to 1 / 2 the thickness of the second center magnet 3411 along the first direction, it is possible not only to ensure that the magnet volume of the magnetic circuit system 3 is increased and the BL value is improved, but also that the second side magnet 3421 does not occupy too much space in the second cavity 12. It can also ensure that the sound waves radiated by the diaphragm assembly 21 into the second cavity 12 can flow smoothly, thereby reducing the sound quality and improving the acoustic performance of the sound generating device 100.

[0115] Understandable, such as Figure 4 As shown, the voice coil 22 has a first end near the first plate portion 2121 and a second end away from the first plate portion 2121. In this embodiment, since a first central magnetic plate 3312 is provided on the first central magnet 3311, optionally, the second plate portion 2122 is located between the middle position of the voice coil 22 and the first end. That is, the projection of the second plate portion 2122 along the direction perpendicular to the first direction is located between the middle position of the voice coil 22 and the first end.

[0116] It should be noted that the second plate portion 2122 and the first plate portion 2121 are located on different planes along the first direction. Therefore, the second plate portion 2122 is located below the first end of the voice coil 22, that is, below the end of the voice coil 22 that is close to the first plate portion 2121. This is not limited here.

[0117] In one embodiment, the sound-generating device 100 further includes a bracket 5 connected to the housing 1, the outer periphery of the diaphragm assembly 21 is fixed to the bracket 5, and the bracket 5 and the first side magnetic plate 3322 are integrally formed.

[0118] Optionally, the bracket 5 and the first side magnetic plate 3322 are integrally formed. In this embodiment, the first side magnetic plate 3322 of the first side magnetic part 332 and the bracket 5 can be integrally formed. For example, the bracket 5 is a plastic bracket, and the bracket 5 and the first side magnetic plate 3322 are integrally injection molded; or, the bracket 5 is a metal bracket, in which case the bracket 5 and the first side magnetic plate 3322 are integrally stretched and formed, which is not limited here. Of course, in other embodiments, the bracket 5 and the first side magnetic plate 3322 can also be connected by welding or bonding, which is not limited here.

[0119] It should be noted that the bracket 5 is used to fix the vibration system 2 and to support the first housing 13 and the second housing 14, so that the first housing 13 and the second housing 14 are arranged opposite each other and spaced apart.

[0120] In the third embodiment, the first central magnetic part 331 includes a first central magnet 3311, the first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic plate 3322 stacked together, the second central magnetic part 341 includes a second central magnet 3411 and a second central magnetic plate 3412 stacked together, and the second side magnetic part 342 includes a second side magnet 3421; wherein, the sides of the first central magnet 3311 and the second side magnet 3421 facing the diaphragm assembly 21 are both exposed in the internal cavity of the sound generating device 100.

[0121] In this embodiment, as Figure 5 As shown, the first central magnet 331 consists only of the first central magnet 3311, and the second side magnet 342 consists only of the second side magnet 3421. At this time, the side of the first central magnet 3311 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound-generating device 100, that is, exposed in the first cavity 11, and the side of the second side magnet 3421 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound-generating device 100, that is, exposed in the second cavity 12.

[0122] Understandably, the first central magnet 3311 and the first side magnet 3321 are both connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are both connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0123] It should be noted that, compared with the first embodiment, the third embodiment provides a second central magnetic guide plate 3412 on the second central magnet 3411. While maintaining the same functions and effects, the second central magnetic guide plate 3412 further utilizes the magnetic focusing effect, allowing more magnetic field lines to pass through the voice coil 22, increasing the magnetic field strength in the area where the voice coil 22 is located. It also improves the flatness of the BLx curve. Even when the voice coil 22 moves to a side away from the magnetic gap 334, the magnetic force on the voice coil 22 is increased under the action of the two magnetic circuits, thereby improving the sound sensitivity, enhancing sound quality, and improving the acoustic performance of the sound-generating device 100. It is understood that the functions and effects of the third embodiment that are the same as those of the first embodiment will not be elaborated upon further.

[0124] In one embodiment, along the first direction, the distance from the side of the second plate portion 2122 facing the first central magnet 3311 to the first central magnet 3311 is the same as the distance from the side of the second plate portion 2122 facing the second central magnetic guide plate 3412 to the second central magnetic guide plate 3412.

[0125] In this embodiment, as Figure 5 As shown, the second plate portion 2122 has a first surface facing the first central magnet 3311 and a second surface facing the second central magnetic plate 3412. Optionally, the distance from the first surface to the first central magnet 3311 is the same as the distance from the second surface to the second central magnetic plate 3412. This ensures that when the voice coil 22 drives the second plate portion 2122 to vibrate in the first direction, collision interference between the second plate portion 2122 and the first central magnet 3311 and the second central magnetic plate 3412 can be effectively avoided.

[0126] Optionally, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction.

[0127] In this embodiment, as Figure 5 As shown, the first central magnet 3311 and the second central magnet 3411 have the same outer contour, and the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. This results in the magnetic field strength of the first central magnet 3311 being less than or equal to the magnetic field strength of the second central magnet 3411. Optionally, the second central magnet 3411 and the second central magnetic plate 3412 have the same outer contour and are both plate-shaped.

[0128] Understandably, the first side magnet 3321 is located outside the first center magnet 3311, so that the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is greater than the magnetic field strength of the first center magnet 3311. By setting the magnetic energy product of the second center magnet 3411 to be greater than or equal to the magnetic energy product of the first center magnet 3311, the magnetic field strength in the magnetic gap 334 formed by the first side magnet 3321 and the first center magnet 3311 is comparable to the magnetic field strength formed by the second center magnet 3411 and the second side magnet 3421. This can balance the magnetic field strength at both ends of the voice coil 22, further improve the flatness of the BLx curve, and thus reduce distortion.

[0129] Optionally, the amplitude of the vibration system 2 is less than or equal to the thickness of the first central magnet 3311 along the first direction. In this embodiment, the thickness of the first central magnet 3311 along the first direction is less than or equal to the thickness of the second central magnet 3411 along the first direction. By making the amplitude of the vibration system 2 less than or equal to the thickness of the first central magnet 3311 along the first direction, it can be ensured that the diaphragm assembly 21 of the vibration system 2 avoids interference with the first magnetic circuit assembly 33 and the second magnetic circuit assembly 34 when it vibrates.

[0130] In one embodiment, the thickness of the second side magnet 3421 along the first direction is less than or equal to half the thickness of the second center magnet 3411 along the first direction.

[0131] In this embodiment, as Figure 5 As shown, by setting the thickness of the second side magnet 3421 along the first direction to be less than or equal to 1 / 2 the thickness of the second center magnet 3411 along the first direction, it is possible not only to ensure that the magnet volume of the magnetic circuit system 3 is increased and the BL value is improved, but also that the second side magnet 3421 does not occupy too much space in the second cavity 12. It can also ensure that the sound waves radiated by the diaphragm assembly 21 into the second cavity 12 can flow smoothly, thereby reducing the sound quality and improving the acoustic performance of the sound generating device 100.

[0132] Understandable, such as Figure 5 As shown, the voice coil 22 has a first end near the first plate portion 2121 and a second end away from the first plate portion 2121. In this embodiment, since a second central magnetic plate 3412 is provided on the second central magnet 3411, optionally, the second plate portion 2122 is located between the middle position of the voice coil 22 and the second end. That is, the projection of the second plate portion 2122 along the direction perpendicular to the first direction is located between the middle position of the voice coil 22 and the second end.

[0133] Of course, in other embodiments, the second plate portion 2122 may be disposed at the bottom of the voice coil 22, that is, the second plate portion 2122 is connected to the second end of the voice coil 22. This is to ensure that the second end of the voice coil 22, away from the first plate portion 2121, remains within the magnetic gap 334. It is understood that the thickness of the first side magnet 3321 along the first direction is greater than the thickness of the first center magnet 3311 along the first direction, and the thickness of the first side magnet 3321 along the first direction is less than or equal to twice the thickness of the first center magnet 3311 along the first direction.

[0134] In one embodiment, the sound-generating device 100 further includes a bracket 5 connected to the housing 1, the outer periphery of the diaphragm assembly 21 is fixed to the bracket 5, and the bracket 5 and the first side magnetic plate 3322 are integrally formed.

[0135] Optionally, the bracket 5 and the first side magnetic plate 3322 are integrally formed. In this embodiment, the first side magnetic plate 3322 of the first side magnetic part 332 and the bracket 5 can be integrally formed. For example, the bracket 5 is a plastic bracket, and the bracket 5 and the first side magnetic plate 3322 are integrally injection molded; or, the bracket 5 is a metal bracket, in which case the bracket 5 and the first side magnetic plate 3322 are integrally stretched and formed, which is not limited here. Of course, in other embodiments, the bracket 5 and the first side magnetic plate 3322 can also be connected by welding or bonding, which is not limited here.

[0136] It should be noted that the bracket 5 is used to fix the vibration system 2 and to support the first housing 13 and the second housing 14, so that the first housing 13 and the second housing 14 are arranged opposite each other and spaced apart.

[0137] In one embodiment, the first magnetic circuit assembly 33 further includes an intermediate magnet 333 disposed between the first central magnetic part 331 and the first side magnetic part 332. The side of the intermediate magnet 333 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound generating device 100. The thickness of the intermediate magnet 333 along the first direction is less than the thickness of the first central magnetic part 331 and the first side magnetic part 332 along the first direction, so that the first side magnetic part 332, the intermediate magnet 333 and the first central magnetic part 331 surround and form a magnetic gap 334.

[0138] In this embodiment, as Figures 6 to 8 As shown, the intermediate magnet 333 is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the intermediate magnet 333 near the first central magnetic part 331 has the same polarity as the magnetic pole of the first central magnetic part 331 facing the second plate part 2122. In this way, the first central magnetic part 331, the intermediate magnet 333, and the first side magnetic part 332 of the first magnetic circuit assembly 33 cooperate to form a Hellbeck magnetic array, such that the magnetic field strengthening side of the Hellbeck magnetic array formed by the first magnetic circuit assembly 33 faces the side closer to the diaphragm assembly 21.

[0139] Understandably, the intermediate magnet 333 is abutted against the first central magnet 331 and the first side magnet 332 on opposite sides perpendicular to the first direction. That is, the intermediate magnet 333 is abutted against the first central magnet 331 and the first side magnet 332 on opposite sides. It should be noted that when the first central magnet 331, intermediate magnet 333, and first side magnet 332 of the first magnetic circuit assembly 33 are assembled close together, gaps or gaps may exist between the intermediate magnet 333 and the first central magnet 331 and the first side magnet 332 due to assembly tolerances or errors. These gaps or gaps are assembly gaps or gaps.

[0140] In this embodiment, no separate gap is provided between the intermediate magnet 333 and the first central magnetic part 331 and the first side magnetic part 332. It can be understood that this arrangement allows the Heilbeck magnetic array formed by the first magnetic circuit assembly 33 to further enhance the magnetic field strength, which not only increases the magnet volume of the magnetic circuit system 3, but also effectively improves the BL value of the sound generating device 100.

[0141] In this embodiment, as Figures 6 to 8 As shown, the thickness of the intermediate magnet 333 along the first direction is less than the thickness of the first central magnetic part 331 and the first side magnetic part 332 along the first direction, so that the first side magnetic part 332, the intermediate magnet 333 and the first central magnetic part 331 surround and form a magnetic gap 334. At this time, the intermediate magnet 333 and the voice coil 22 are directly opposite each other along the first direction.

[0142] It should be noted that the structural configuration of the first central magnetic part 331 and the first side magnetic part 332 of the first magnetic circuit assembly 33, and the second central magnetic part 341 and the second side magnetic part 342 of the second magnetic circuit assembly 34 are the same as those described in the first to third embodiments.

[0143] In one embodiment, the first side magnetic portion 332 includes a first side magnet 3321 and a first side magnetic guide plate 3322 stacked together. The first side magnetic guide plate 3322 extends toward the magnetic gap 334 and forms an extension portion 3323 located on top of the intermediate magnet 333. The ratio of the extension length of the extension portion 3323 to the width between the first central magnetic portion 331 and the first side magnetic portion 332 is less than 0.5.

[0144] In this embodiment, as Figures 6 to 8 As shown, the thickness of the middle magnet 333 along the first direction is less than the thickness of the first central magnetic part 331 and the first side magnetic part 332 along the first direction, so that the first side magnetic part 332, the middle magnet 333 and the first central magnetic part 331 surround and form a magnetic gap 334.

[0145] Understandably, in the magnetic circuit formed by the first central magnetic part 331 and the first side magnetic part 332, the magnetic field lines near the first housing 13 are guided from the first side magnetic part 332 to the first central magnetic part 331 by the magnetic focusing effect of the first housing 13 and in conjunction with the intermediate magnet 333. In this embodiment, by extending the first side magnetic guide plate 3322 toward the magnetic gap 334 and forming an extension 3323 located at the top of the intermediate magnet 333, the magnetic field lines near the diaphragm assembly 21 in the magnetic circuit formed by the first central magnetic part 331 and the first side magnetic part 3322 are guided from the first central magnetic part 331 to the first side magnetic part 332 by the magnetic focusing effect of the first side magnetic guide plate 3322 and the extension 3323, thereby forming a complete magnetic circuit between the first central magnetic part 331 and the first side magnetic part 332.

[0146] Meanwhile, the first side magnetic plate 3322 and the extension 3323 can also guide the magnetic field lines near the diaphragm assembly 21 in the magnetic circuit formed by the second central magnetic part 341 and the second side magnetic part 342 from the second central magnetic part 341 to the second housing 14 and the second side magnetic part 342 through the magnetic focusing effect of the first side magnetic plate 3322 and the extension 3323. This is not limited here.

[0147] Optionally, the ratio of the extension length of the extension portion 3323 to the width between the first central magnetic portion 331 and the first side magnetic portion 332 is less than 0.5. This arrangement enhances the magnetic focusing effect between the first side magnetic plate 3322 and the extension portion 3323 while preventing the extension portion 3323 from interfering with the voice coil 22 within the magnetic gap 334. In this embodiment, as... Figures 6 to 8 As shown, the extension 3323 is located outside the voice coil 22.

[0148] In the fourth embodiment, the first magnetic circuit assembly 33 includes a first central magnetic part 331, an intermediate magnet 333, and a first side magnetic part 332. The first central magnetic part 331 includes a first central magnet 3311, the first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic guide plate 3322 stacked together, the second central magnetic part 341 includes a second central magnet 3411, and the second side magnetic part 342 includes a second side magnet 3421. The side of the first central magnet 3311, the intermediate magnet 333, the second central magnet 3411, and the second side magnet 3421 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound generating device 100.

[0149] In this embodiment, as Figure 6As shown, the first central magnet 331 consists only of the first central magnet 3311, the second central magnet 341 consists only of the second central magnet 3411, and the second side magnet 342 consists only of the second side magnet 3421. At this time, the sides of the first central magnet 3311 and the intermediate magnet 333 facing the diaphragm assembly 21 are exposed in the internal cavity of the sound-generating device 100, that is, exposed in the first cavity 11. The sides of the second central magnet 3411 and the second side magnet 3421 facing the diaphragm assembly 21 are both exposed in the internal cavity of the sound-generating device 100, that is, exposed in the second cavity 12.

[0150] Understandably, the first central magnet 3311, the middle magnet 333, and the first side magnet 3321 are all connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are all connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0151] It should be noted that, compared with the first embodiment, the fourth embodiment adds an intermediate magnet 333 between the first central magnet 3311 and the first side magnet 3321. While maintaining the same functions and effects, the intermediate magnet 333 further increases the magnetic field strength of the magnetic circuit formed by the first central magnet 3311 and the first side magnet 3321, thereby increasing the magnetic field strength in the region where the voice coil 22 is located. This enhances the magnetic force on the voice coil 22, thereby improving sound sensitivity, sound quality, and the acoustic performance of the sound-generating device 100. It is understood that the functions and effects of the fourth embodiment that are the same as those of the first embodiment will not be elaborated upon further.

[0152] In the fifth embodiment, the first magnetic circuit assembly 33 includes a first central magnetic part 331, an intermediate magnet 333, and a first side magnetic part 332. The first central magnetic part 331 includes a first central magnet 3311 and a first central magnetic guide plate 3312 stacked together. The first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic guide plate 3322 stacked together. The second central magnetic part 341 includes a second central magnet 3411, and the second side magnetic part 342 includes a second side magnet 3421. The side of the intermediate magnet 333, the second central magnet 3411, and the second side magnet 3421 facing the diaphragm assembly 21 are all exposed in the internal cavity of the sound generating device 100.

[0153] In this embodiment, as Figure 7As shown, the second central magnet 341 consists only of the second central magnet 3411, and the second side magnet 342 consists only of the second side magnet 3421. At this time, the side of the central magnet 333 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound-generating device 100, that is, exposed in the first cavity 11. The sides of the second central magnet 3411 and the second side magnet 3421 facing the diaphragm assembly 21 are both exposed in the internal cavity of the sound-generating device 100, that is, exposed in the second cavity 12.

[0154] Understandably, the first central magnet 3311, the middle magnet 333, and the first side magnet 3321 are all connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are all connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0155] It should be noted that, compared with the second embodiment, the fifth embodiment provides an intermediate magnet 333 between the first central magnet 3311 and the first side magnet 3321. While maintaining the same functions and effects, the intermediate magnet 333 further increases the magnetic field strength of the magnetic circuit formed by the first central magnet 3311 and the first side magnet 3321, thereby increasing the magnetic field strength in the region where the voice coil 22 is located. This enhances the magnetic force on the voice coil 22, thereby improving sound sensitivity, sound quality, and the acoustic performance of the sound-generating device 100. It is understood that the functions and effects of the fifth embodiment that are the same as those of the second embodiment will not be elaborated upon further.

[0156] In the sixth embodiment, the first magnetic circuit assembly 33 includes a first central magnetic part 331, an intermediate magnet 333, and a first side magnetic part 332. The first central magnetic part 331 includes a first central magnet 3311, the first side magnetic part 332 includes a first side magnet 3321 and a first side magnetic guide plate 3322 stacked together, the second central magnetic part 341 includes a second central magnet 3411 and a second central magnetic guide plate 3412 stacked together, and the second side magnetic part 342 includes a second side magnet 3421. The sides of the first central magnet 3311, the intermediate magnet 333, and the second side magnet 3421 facing the diaphragm assembly 21 are all exposed in the internal cavity of the sound generating device 100.

[0157] In this embodiment, as Figure 8 As shown, the first central magnet 331 consists only of the first central magnet 3311, and the second side magnet 342 consists only of the second side magnet 3421. At this time, the sides of the first central magnet 3311 and the middle magnet 333 facing the diaphragm assembly 21 are exposed in the internal cavity of the sound generating device 100, that is, exposed in the first cavity 11. The side of the second side magnet 3421 facing the diaphragm assembly 21 is exposed in the internal cavity of the sound generating device 100, that is, exposed in the second cavity 12.

[0158] Understandably, the first central magnet 3311, the middle magnet 333, and the first side magnet 3321 are all connected to the first housing 13 on the side facing away from the diaphragm assembly 21, and the second central magnet 3411 and the second side magnet 3421 are all connected to the second housing 14 on the side facing away from the diaphragm assembly 21.

[0159] It should be noted that, compared with the third embodiment, the sixth embodiment provides an intermediate magnet 333 between the first central magnet 3311 and the first side magnet 3321. While maintaining the same functions and effects, the intermediate magnet 333 further increases the magnetic field strength of the magnetic circuit formed by the first central magnet 3311 and the first side magnet 3321, thereby increasing the magnetic field strength in the region where the voice coil 22 is located. This enhances the magnetic force on the voice coil 22, thereby improving sound sensitivity, sound quality, and the acoustic performance of the sound-generating device 100. It is understood that the functions and effects of the sixth embodiment are the same as those of the third embodiment and will not be elaborated upon further.

[0160] In one embodiment, the first side magnetic portion 332 has a closed annular structure with its ends connected, and the first side magnetic portion 332 is disposed around the outside of the first central magnetic portion 331. In this embodiment, the first side magnetic portion 332 is an integrally formed closed annular structure, in which case the first central magnetic portion 331 is located inside the annular first side magnetic portion 332, that is, the first side magnetic portion 332 is disposed around the outside of the first central magnetic portion 331, and a magnetic gap 334 is formed between the first side magnetic portion 332 and the first central magnetic portion 331.

[0161] It is understandable that the structural outlines of the first side magnet 3321 and the first side magnetic plate 3322 of the first side magnetic part 332 are similar. That is, when the first side magnetic part 332 is an integral ring structure, both the first side magnet 3321 and the first side magnetic plate 3322 are integral ring structures; or, when the first side magnetic part 332 is a split structure, both the first side magnet 3321 and the first side magnetic plate 3322 are split structures, and they correspond one-to-one. Of course, in other embodiments, the structures of the first side magnet 3321 and the first side magnetic plate 3322 of the first side magnetic part 332 can also be different. For example, one of the first side magnet 3321 and the first side magnetic plate 3322 may be an integral ring, and the other may be a split structure. This is not limited here.

[0162] In another embodiment, the first side magnetic portion 332 includes multiple first side magnetic portions 332, which are connected end to end to form a ring structure and are disposed around the outside of the first central magnetic portion 331. In this embodiment, the multiple first side magnetic portions 332 are spliced ​​together and disposed around the outside of the first central magnetic portion 331, such that adjacent first side magnetic portions 332 abut or abut against each other. At this time, the multiple first side magnetic portions 332 are connected end to end to form a ring structure and are located outside the first central magnetic portion 331, and are spaced apart from the first central magnetic portion 331 to form a magnetic gap 334.

[0163] It is understandable that the first magnet 3321 and the first magnetic guide plate 332 of the first side magnetic part 332 have similar structural outlines. In this embodiment, the first magnet 3321 and the first magnetic guide plate 3322 may be arranged in the form of a strip or a plate, and there is no limitation here.

[0164] In another embodiment, the first side magnetic portion 332 includes a plurality of such portions, which are spaced apart and arranged around the outside of the first central magnetic portion 331. In this embodiment, as... Figure 9 As shown, a plurality of first side magnetic parts 332 are spaced apart, such that gaps are formed between adjacent first side magnetic parts 332. The plurality of first side magnetic parts 332 are spaced apart and arranged around the outside of the first central magnetic part 331, and form magnetic gaps 334 with the first central magnetic part 331.

[0165] It is understandable that the first magnet 3321 and the first magnetic guide plate 332 of the first side magnetic part 332 have similar structural outlines. In this embodiment, the first magnet 3321 and the first magnetic guide plate 3322 may be arranged in the form of a strip or a plate, and there is no limitation here.

[0166] Optionally, the first side magnetic part 332 may include two or four. When there are two first side magnetic parts 332, the two first side magnetic parts 332 are respectively disposed on opposite sides of the first central magnetic part 331 along the second direction, and both the two first side magnetic parts 332 and the first central magnetic part 331 extend along a third direction, with the first direction, the second direction, and the third direction being arranged perpendicularly to each other. When there are four first side magnetic parts 332, the two first side magnetic parts 332 are respectively disposed on opposite sides of the first central magnetic part 331 along the second direction, and the other two first side magnetic parts 332 are respectively disposed on opposite sides of the first central magnetic part 331 along a third direction, with the first direction, the second direction, and the third direction being arranged perpendicularly to each other, which is not limited here.

[0167] In one embodiment, the intermediate magnet 333 has a closed ring structure with the ends connected. The intermediate magnet 333 is arranged around the outside of the first central magnetic part 331 and is located between the first central magnetic part 331 and the first side magnetic part 332. The two sides of the intermediate magnet 333 facing the first central magnetic part 331 and the first side magnetic part 332 are respectively abutted or closely attached to the first central magnetic part 331 and the first side magnetic part 332, which is not limited here.

[0168] Of course, in other embodiments, there may be multiple intermediate magnets 333, which are connected end to end to form a ring structure and are arranged around the outside of the first central magnetic part 331, located between the first central magnetic part 331 and the first side magnetic part 332. The two sides of the intermediate magnets 333 facing the first central magnetic part 331 and the first side magnetic part 332 are respectively abutted against or closely attached to the first central magnetic part 331 and the first side magnetic part 332, which is not limited here. Alternatively, there may be multiple intermediate magnets 333, which are spaced apart and arranged around the outside of the first central magnetic part 331, located between the first central magnetic part 331 and the first side magnetic part 332. The multiple intermediate magnets 333 are spaced apart, forming gaps between adjacent intermediate magnets 333. The two sides of each intermediate magnet 333 facing the first central magnetic part 331 and the first side magnetic part 332 are respectively abutted against or closely attached to the first central magnetic part 331 and the first side magnetic part 332, which is not limited here.

[0169] Optionally, the intermediate magnets 333 may include two or four. When there are two intermediate magnets 333, the two intermediate magnets 333 are respectively disposed on opposite sides of the first central magnetic part 331 along the second direction, and both the two intermediate magnets 333 and the first central magnetic part 331 extend along a third direction, with the first direction, second direction and third direction being arranged perpendicularly to each other. When there are four intermediate magnets 333, the two intermediate magnets 333 are respectively disposed on opposite sides of the first central magnetic part 331 along the second direction, and the other two intermediate magnets 333 are respectively disposed on opposite sides of the first central magnetic part 331 along a third direction, with the first direction, second direction and third direction being arranged perpendicularly to each other, which is not limited here.

[0170] In one embodiment, the second side magnetic portion 342 has a closed annular structure with its ends connected, and the second side magnetic portion 342 is disposed around the outside of the second central magnetic portion 341. In this embodiment, the second side magnetic portion 342 is an integrally formed closed annular structure, in which case the second central magnetic portion 341 is located inside the annular second side magnetic portion 342, that is, the second side magnetic portion 342 is disposed around the outside of the second central magnetic portion 341 and spaced apart from the second central magnetic portion 341. Optionally, the second side magnetic portion 342 is disposed in close contact with the second central magnetic portion 341.

[0171] In another embodiment, the second side magnetic portion 342 includes multiple second side magnetic portions 342, which are connected end-to-end to form a ring structure and are disposed around the outside of the second central magnetic portion 341. In this embodiment, the multiple second side magnetic portions 342 are spliced ​​together and disposed around the outside of the second central magnetic portion 341, such that adjacent second side magnetic portions 342 abut or abut against each other. In this case, the multiple second side magnetic portions 342 are connected end-to-end to form a ring structure and are located outside the second central magnetic portion 341, and are spaced apart from the second central magnetic portion 341. Optionally, all of the multiple second side magnetic portions 342 are disposed in close contact with the second central magnetic portion 341.

[0172] In another embodiment, the second side magnetic portion 342 includes a plurality of second side magnetic portions 342, which are spaced apart and arranged around the outside of the second central magnetic portion 341. In this embodiment, the plurality of second side magnetic portions 342 are spaced apart, such that a gap is formed between adjacent second side magnetic portions 342, and the plurality of second side magnetic portions 342 are spaced apart and arranged around the outside of the second central magnetic portion 341, and are spaced apart from the second central magnetic portion 341. Optionally, the plurality of second side magnetic portions 342 are all disposed in close contact with the second central magnetic portion 341.

[0173] Optionally, the second magnetic section 342 may include two or four. For example... Figures 2 to 9 As shown, when there are two second side magnetic parts 342, the two second side magnetic parts 342 are respectively disposed on opposite sides of the second central magnetic part 341 along the second direction, and both the two second side magnetic parts 342 and the second central magnetic part 341 extend along the third direction, with the first direction, the second direction, and the third direction being arranged perpendicularly to each other. Optionally, the second central magnetic part 341 is respectively disposed close to the two second side magnetic parts 342 on both sides along the second direction.

[0174] When there are four second side magnetic parts 342, two second side magnetic parts 342 are respectively disposed on opposite sides of the second central magnetic part 341 along the second direction, and the other two second side magnetic parts 342 are respectively disposed on opposite sides of the second central magnetic part 341 along the third direction. The first direction, the second direction, and the third direction are arranged perpendicularly to each other, which is not limited here. Optionally, the two sides of the second central magnetic part 341 along the second direction are respectively attached to the two second side magnetic parts 342, and the two sides of the second central magnetic part 341 along the third direction are respectively attached to the two second side magnetic parts 342.

[0175] In some embodiments of the present invention, such as Figures 9 to 11As shown, the first plate portion 2121 can be a planar annular structure, with the inner periphery of the diaphragm 211 connected to the first plate portion 2121. Optionally, the first plate portion 2121 is located between the inner periphery of the diaphragm 211 and the top of the voice coil 22. Of course, in other embodiments, the outer periphery of the first plate portion 2121 is recessed and bent towards the voice coil 22 to form a stepped portion, with the inner periphery of the diaphragm 211 supported and overlapping the stepped portion.

[0176] In this embodiment, a step is formed by concave bending of the outer periphery of the first plate portion 2121, thereby fixing the inner periphery of the diaphragm 211 and positioning and limiting the inner periphery of the diaphragm 211. Simultaneously, when the inner periphery of the diaphragm 211 is supported and overlapped with the step, the inner periphery of the diaphragm 211 can optionally be flush with the first plate portion 2121. This makes the mating structure between the first plate portion 2121 and the diaphragm 211 more compact, reducing the occupied vibration space.

[0177] The present invention also proposes a sound-generating module, which includes the sound-generating device 100 described above. 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.

[0178] In one embodiment, the sound-generating module further includes a module housing, which has a receiving cavity. The sound-generating device 100 is disposed in the receiving cavity, and the receiving cavity is divided into a front sound cavity and a rear sound cavity. The module housing has a sound outlet hole that communicates with the front sound cavity.

[0179] In this embodiment, the module housing can be a metal housing or a plastic housing, and there is no limitation thereto. The module housing can be a one-piece structure or a split structure, and there is no limitation thereto. The module housing includes an upper module shell and a lower module shell, which are butt-connected and enclose a receiving cavity. Optionally, the upper module shell and the lower module shell can be bonded together or welded together.

[0180] Optionally, the outer contour of the module housing 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.

[0181] In this embodiment, the sound-generating device 100 is disposed within the receiving cavity, which is divided into a front sound cavity and a rear sound cavity. The upper shell of the module corresponds to the front sound cavity, and the lower shell of the module corresponds to the rear sound cavity. It is understood that the sound outlet is located on the upper shell of the module or at the connection between the upper and lower shells.

[0182] In one embodiment, the module housing is further provided with a vent hole communicating with the rear acoustic cavity for adjusting the pressure within the rear acoustic cavity. 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.

[0183] 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 of the sound-generating module. That is, the module housing 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 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-generating performance of the sound-generating module 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 invention does not limit it.

[0184] In this embodiment, 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 shell, the first shell 13 of the sound-generating device 100 corresponds to or is located at the first opening, and the second shell 14 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; or, the first opening is only used to install the sound-generating device 100 to reduce the thickness of the sound-generating module in the Z direction, which is not limited here.

[0185] In one embodiment, the sound outlet is directly opposite the diaphragm assembly 21 of the sound-generating device 100, so that the sound-generating module has a forward sound output structure. It can be understood that when the sound outlet of the sound-generating module is directly opposite the diaphragm assembly 21 of the sound-generating device 100, the sound-generating module has a forward sound output structure.

[0186] Optionally, the sound outlet hole and the sound outlet 143 of the sound-generating device 100 are directly connected; or, the sound outlet hole is connected to the sound outlet 143 of the sound-generating device 100 through a sound outlet channel, which is not limited here.

[0187] In one embodiment, the sound outlet is located on one side of the sound-generating device 100, so that the sound-generating module has a side-emitting structure. It can be understood that the sound outlet of the sound-generating module is located on one side of the sound-generating device 100, that is, the sound outlet is not directly opposite the diaphragm assembly 21 of the sound-generating device 100, but is located on one side of the periphery of the diaphragm assembly 21, in which case the sound-generating module has a side-emitting structure.

[0188] Optionally, the sound outlet hole and the sound outlet 143 of the sound-generating device 100 are directly connected; or, the sound outlet hole is connected to the sound outlet 143 of the sound-generating device 100 through a sound outlet channel, which is not limited here.

[0189] The present invention also proposes an electronic device, which includes the aforementioned sound-generating device 100 or sound-generating module. The specific structure of the sound-generating device 100 or sound-generating module 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.

[0190] Optionally, the aforementioned electronic device may be a mobile phone, earphones, computer, PAD, smart wearable device, etc., and the present invention does not impose specific limitations on it.

[0191] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: shell; A vibration system, disposed within the housing and vibrating along a first direction, includes a diaphragm assembly and a voice coil. The diaphragm assembly includes a diaphragm and a diaphragm plate. The diaphragm plate includes a first plate portion and a second plate portion located on different horizontal planes. The inner periphery of the diaphragm is connected to the first plate portion, and the top of the voice coil is connected to the first plate portion. The second plate portion is located inside the voice coil, and the outer periphery of the second plate portion abuts against the inner peripheral wall of the voice coil. A magnetic circuit system is disposed within the housing. The magnetic circuit system includes a first magnetic circuit assembly and a second magnetic circuit assembly located on opposite sides of the diaphragm assembly along the first direction. The first magnetic circuit assembly includes a first central magnetic part and a first side magnetic part. The first side magnetic part is located outside the first central magnetic part and is spaced apart from the first central magnetic part to form a magnetic gap. The end of the voice coil away from the first plate is suspended in the magnetic gap. The second magnetic circuit assembly includes a second central magnetic part and a second side magnetic part. The second side magnetic part is located outside the second central magnetic part. The first central magnetic part and the second central magnetic part are arranged opposite to each other along the first direction, and the projections of the first central magnetic part and the second central magnetic part along the first direction are both located inside the voice coil. Wherein, the first central magnetic part and the first side magnetic part are both magnetized along the first direction but in opposite directions, the first central magnetic part and the second central magnetic part are both magnetized along the first direction but in opposite directions, the second side magnetic part is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the second side magnetic part near the second central magnetic part has the same polarity as the magnetic pole of the second central magnetic part facing the second plate, and the projection of the second side magnetic part along the first direction at least partially coincides with the projection of the magnetic gap along the first direction.

2. The sound-generating device as described in claim 1, characterized in that, The second side magnetic part is disposed in close contact with the second central magnetic part; or, there is a gap between the second side magnetic part and the second central magnetic part, the width of the gap being no greater than 0.02 mm.

3. The sound-generating device as described in claim 1, characterized in that, The second side magnetic part has a closed ring structure with the ends connected, and the second side magnetic part is arranged around the outside of the second central magnetic part; Alternatively, the second side magnetic part may include multiple parts, which are connected end to end to form a ring structure and are arranged around the outside of the second central magnetic part; Alternatively, the second side magnetic portion may include a plurality of second side magnetic portions, which are spaced apart and arranged around the outside of the second central magnetic portion; Alternatively, the second side magnetic part includes two parts, which are respectively disposed on opposite sides of the second central magnetic part along the second direction, and both the second side magnetic parts and the second central magnetic part extend along the third direction; wherein the first direction, the second direction and the third direction are arranged perpendicularly to each other.

4. The sound-generating device as described in claim 1, characterized in that, The first central magnetic part includes a first central magnet, the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together, the second central magnetic part includes a second central magnet, and the second side magnetic part includes a second side magnet; The sides of the first central magnet, the second central magnet, and the second side magnet facing the diaphragm assembly are all exposed in the internal cavity of the sound-generating device.

5. The sound-generating device as described in claim 4, characterized in that, The thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate facing the second central magnet to the second central magnet; And / or, the second plate portion is located at the middle position of the voice coil along the first direction; And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

6. The sound-generating device as claimed in claim 1, characterized in that, The first central magnetic part includes a first central magnet and a first central magnetic plate stacked together; the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together; the second central magnetic part includes a second central magnet; and the second side magnetic part includes a second side magnet. The sides of the second central magnet and the second side magnet facing the diaphragm assembly are both exposed in the internal cavity of the sound-generating device.

7. The sound-generating device as described in claim 6, characterized in that, The thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate facing the first central magnetic plate to the first central magnetic plate is the same as the distance from the side of the second plate facing the second central magnet to the second central magnet; And / or, the voice coil has a first end near the first plate portion and a second end away from the first plate portion, the second plate portion being located between the middle position of the voice coil and the first end; And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

8. The sound-generating device as claimed in claim 1, characterized in that, The first central magnetic part includes a first central magnet, the first side magnetic part includes a first side magnet and a first side magnetic plate stacked together, the second central magnetic part includes a second central magnet and a second central magnetic plate stacked together, and the second side magnetic part includes a second side magnet. The sides of the first central magnet and the second side magnet facing the diaphragm assembly are both exposed in the internal cavity of the sound-generating device.

9. The sound-generating device as described in claim 8, characterized in that, The thickness of the first central magnet along the first direction is less than or equal to the thickness of the second central magnet along the first direction; And / or, the amplitude of the vibration system is less than or equal to the thickness of the first central magnet along the first direction; And / or, the thickness of the second side magnet along the first direction is less than or equal to 1 / 2 of the thickness of the second center magnet along the first direction; And / or, along the first direction, the distance from the side of the second plate portion facing the first central magnet to the first central magnet is the same as the distance from the side of the second plate portion facing the second central magnetic plate to the second central magnetic plate; And / or, the voice coil has a first end near the first plate portion and a second end away from the first plate portion, the second plate portion being located between the middle position of the voice coil and the second end; And / or, the thickness of the first side magnet along the first direction is greater than the thickness of the first center magnet along the first direction, and the thickness of the first side magnet along the first direction is less than or equal to twice the thickness of the first center magnet along the first direction. And / or, the sound-generating device further includes a bracket connected to the housing, the outer periphery of the diaphragm assembly is fixed to the bracket, and the bracket and the first side magnetic plate are integrally formed.

10. The sound-generating device as claimed in claim 1, characterized in that, The first magnetic circuit assembly further includes an intermediate magnet disposed between the first central magnetic part and the first side magnetic part. The side of the intermediate magnet facing the diaphragm assembly is exposed in the internal cavity of the sound-generating device. The thickness of the intermediate magnet along the first direction is less than the thickness of the first central magnetic part and the first side magnetic part along the first direction, so that the first side magnetic part, the intermediate magnet and the first central magnetic part surround and form the magnetic gap. The intermediate magnet is magnetized in a direction perpendicular to the first direction, and the magnetic pole of the intermediate magnet near the first central magnetic part has the same polarity as the magnetic pole of the first central magnetic part facing the second plate.

11. The sound-generating device as claimed in claim 10, characterized in that, The first side magnetic portion includes a first side magnet and a first side magnetic plate stacked together. The first side magnetic plate extends toward the magnetic gap and forms an extension located at the top of the middle magnet. The ratio of the extension length of the extension to the width between the first central magnetic portion and the first side magnetic portion is less than 0.

5. And / or, the two opposite sides of the intermediate magnet are respectively attached to the first central magnetic part and the first side magnetic part.

12. The sound-generating device as claimed in claim 1, characterized in that, The outer casing includes a first housing and a second housing disposed opposite to each other. The sound-generating device also includes a bracket. The outer periphery of the diaphragm assembly is connected to the bracket. The bracket is connected to the first housing and the second housing respectively and is located between the first housing and the second housing. A first cavity is formed between the diaphragm assembly and the first housing. A second cavity is formed between the diaphragm assembly and the second housing. A first magnetic circuit assembly is disposed in the first cavity. The first central magnetic part and the first side magnetic part are connected to the first housing on the side opposite to the diaphragm assembly. A second magnetic circuit assembly is disposed in the second cavity. The second central magnetic part and the second side magnetic part are connected to the second housing on the side opposite to the diaphragm assembly. Wherein, the second housing is provided with a sound outlet communicating with the second cavity; or, the bracket is provided with a sound outlet communicating with the second cavity; or, the bracket and the second housing cooperate to form a sound outlet communicating with the second cavity.

13. The sound-generating device as claimed in claim 12, characterized in that, The first housing includes a first flat plate portion and a first side plate portion disposed around the periphery of the first flat plate portion and extending toward the bracket. The end of the first side plate portion away from the first flat plate portion is connected to the bracket. The second housing includes a second flat plate portion and a second side plate portion disposed around the periphery of the second flat plate portion and extending toward the bracket. The end of the second side plate portion away from the second flat plate portion is connected to the bracket. The outer periphery of the diaphragm assembly is sandwiched between the second side plate portion and the bracket. The second side plate portion is provided with the sound outlet. And / or, the bracket is a metal part, and the bracket is welded to the first housing and the second housing respectively; or, the bracket is a plastic part, and the bracket is bonded to the first housing and the second housing respectively; And / or, the sound-generating device further includes a welding part that extends along the first direction, one end of the welding part being welded to the first housing and the other end of the welding part being welded to the second housing; And / or, both the first housing and the second housing are made of magnetically conductive material.

14. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 13.

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