Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and an electronic device, and relates to the electroacoustic transduction technology field, the sounding device comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnetic conductive yoke, a central magnetic part and an edge magnetic part, the edge magnetic part is arranged at the outer side of the central magnetic part, and the edge magnetic part and the central magnetic part are spaced to form a magnetic gap; the central magnetic part comprises a first magnetic group, a second magnetic group and a third magnetic group which are stacked, the first magnetic group is connected to the magnetic conductive yoke, the vibration system comprises a vibrating diaphragm and a voice coil, and the voice coil and the magnetic gap are correspondingly arranged; wherein the first magnetic group and the third magnetic group are magnetized along the vibration direction of the vibration system, and the magnetizing direction of the second magnetic group is perpendicular to the magnetizing directions of the first magnetic group and the third magnetic group, so that the central magnetic part forms a Halbach magnetic circuit. According to the sounding device of the utility model, through optimizing the central magnetic part of the magnetic circuit system, the BL value is increased, the flatness of a BL curve is effectively improved, the FR frequency response curve is obviously improved, the harmonic distortion THD is effectively reduced, and the tone quality and performance of the whole machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducer, in particular to a sound generating device and electronic equipment using the sound generating device. Background Art

[0002] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become part of people's daily lives. With the rapid development of technology, people's demand for the sound quality of electronic devices has become higher and higher, and full-range and miniaturized speakers have become mainstream demands.

[0003] At present, the box space in electronic devices is getting smaller and smaller. The BL value of the sound-generating device is limited by the space size, resulting in a small number of magnetic lines passing through the voice coil, which leads to a smaller magnetic field force on the voice coil, low sensitivity of the sound-generating device, and poor overall acoustic performance and sound effects. Utility Model Content

[0004] The main purpose of the utility model is to provide a sound-generating device and an electronic device, aiming to provide a sound-generating device that effectively improves the BL value. The sound-generating device increases the BL value by optimizing the central magnetic part of the magnetic circuit system, effectively improves the flatness of the BL curve, significantly improves the FR frequency response curve, and effectively reduces the harmonic distortion THD, so that the sound quality and performance of the whole machine are better improved.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a sound-generating device, which comprises:

[0006] A magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the side magnetic portion being located outside the central magnetic portion and spaced apart from the central magnetic portion to form a magnetic gap, the central magnetic portion comprising a first magnetic group, a second magnetic group and a third magnetic group arranged in a stacked manner, the first magnetic group being connected to the magnetic yoke;

[0007] A vibration system, the vibration system comprising a diaphragm and a voice coil connected to the diaphragm, the voice coil being arranged corresponding to the magnetic gap;

[0008] The first magnetic group and the third magnetic group are magnetized along the vibration direction of the vibration system, and the magnetization direction of the second magnetic group is perpendicular to the magnetization directions of the first magnetic group and the third magnetic group, so that the central magnetic part forms a Halbach magnetic circuit.

[0009] In one embodiment, the magnetization direction of the first magnetic group is opposite to the magnetization direction of the third magnetic group;

[0010] The second magnetic group is magnetized along a vibration direction perpendicular to the vibration system, and the magnetization direction of the second magnetic group is along the periphery of the second magnetic group toward the center of the second magnetic group; or, the second magnetic group has a first axis and a second axis perpendicular to the vibration direction of the vibration system, and the first axis and the second axis are perpendicular to each other, and the magnetization direction of the second magnetic group is along the first axis and / or the second axis;

[0011] The magnetic poles on the inner side of the second magnetic group close to the center thereof are the same as the magnetic poles on the side of the first magnetic group away from the second magnetic group.

[0012] In one embodiment, the second magnetic group includes a second magnet with an integral plate-shaped structure, and a through hole is opened at the center of the second magnet with the plate-shaped structure.

[0013] In one embodiment, the edge magnetic portion includes a stacked edge magnet and an edge magnetic conductive plate, and the edge magnet is connected to the magnetic conductive yoke;

[0014] The first magnetic group, the third magnetic group and the edge magnet are all magnetized along the vibration direction of the vibration system. The magnetization direction of the first magnetic group is opposite to the magnetization direction of the edge magnet of the edge magnet part, and the magnetization direction of the third magnetic group is the same as the magnetization direction of the edge magnet of the edge magnet part.

[0015] In one embodiment, a projection of at least part of the second magnetic group along a vibration direction perpendicular to the vibration system coincides with a projection of the voice coil along a vibration direction perpendicular to the vibration system.

[0016] In one embodiment, the first magnetic group includes a first magnet having an integral plate-like structure;

[0017] Alternatively, the first magnetic group includes a plurality of first magnets, and the plurality of first magnets are arranged adjacent to each other and located between the second magnetic group and the magnetic yoke; wherein the plurality of first magnets are magnetized along the vibration direction of the vibration system, and the magnetization directions of the plurality of first magnets are the same.

[0018] In one embodiment, the voice coil is in a rectangular ring shape, and the voice coil has a long side and a short side connected end to end;

[0019] The second magnetic group includes two second magnets, the two second magnets are adjacent to each other and arranged in parallel along the direction of the long side, the two second magnets are magnetized along the direction of the long side, and the magnetization directions of the two second magnets are opposite;

[0020] Or, the second magnetic group includes two second magnets, the two second magnets are adjacent to each other and arranged in parallel along the direction of the short side, the two second magnets are magnetized along the direction of the short side, and the magnetization directions of the two second magnets are opposite;

[0021] Or, the second magnetic group includes two second magnets and two third magnets, the two second magnets are adjacent and arranged in parallel along the direction of the short side, the two third magnets are arranged at both ends of the two second magnets along the direction of the long side, the two second magnets and the two third magnets are magnetized along the direction of the short side and the direction of the long side respectively, the magnetization directions of the two second magnets are opposite, and the magnetization directions of the two third magnets are opposite;

[0022] Or, the second magnetic group is divided along two diagonal lines to form two second magnets and two third magnets, the two second magnets are arranged in parallel along the direction of the short side, the two third magnets are arranged in parallel along the direction of the long side, the two second magnets and the two third magnets are magnetized along the direction of the short side and the direction of the long side, respectively, the magnetization directions of the two second magnets are opposite, and the magnetization directions of the two third magnets are opposite.

[0023] In one embodiment, the third magnetic group includes a plurality of fourth magnets, and the plurality of fourth magnets are disposed adjacent to each other and located on a side of the second magnetic group facing away from the first magnetic group;

[0024] Wherein, the plurality of fourth magnets are all magnetized along the vibration direction of the vibration system, and the magnetization directions of the plurality of fourth magnets are the same.

[0025] In one embodiment, at least a portion of a side of the third magnetic group facing away from the second magnetic group protrudes toward a side facing away from the second magnetic group to form a protrusion.

[0026] In one embodiment, the third magnetic group includes a central portion and an edge portion, the edge portion is arranged around the outer periphery of the central portion, and a side of the central portion facing away from the second magnetic group protrudes from a side of the edge portion facing away from the second magnetic group to form the protruding portion;

[0027] The edge portion forms a closed integral annular structure; or, the edge portion includes a plurality of adjacent edge portions connected end to end to form a closed annular structure; or, the edge portion includes a plurality of adjacent edge portions spaced apart to form an annular structure with a gap; or, the edge portion and the center portion are an integrally formed structure.

[0028] In one embodiment, the sound-generating device further includes a shell, the edge magnetic portion includes a stacked edge magnet and an edge magnetic conductive plate, the edge magnet is connected to the magnetic conductive yoke, one end of the shell is connected to the edge magnetic conductive plate, and the other end of the shell is connected to the periphery of the diaphragm.

[0029] In one embodiment, the side magnetic conductive plate and the housing are an integrally formed structure;

[0030] And / or, the diaphragm is annular, the inner periphery of the diaphragm is fixed to the magnetic circuit system, one end of the voice coil is connected to the diaphragm, and the other end of the voice coil is suspended in the magnetic gap.

[0031] In one embodiment, the vibration system further includes a frame, and the voice coil is connected to the diaphragm through the frame.

[0032] In one embodiment, the skeleton includes a main body and a connecting portion connected to the periphery of the main body, and the main body is provided between the diaphragm and the voice coil;

[0033] The vibration system also includes a centering support plate, which includes an external fixing portion, an internal fixing portion, and an elastic wall portion connecting the external fixing portion and the internal fixing portion, the external fixing portion is connected to the outer shell and / or the edge magnetic portion, and the internal fixing portion is connected to the connecting portion.

[0034] In one embodiment, the diaphragm includes an inner ring portion, a first folded ring arranged around the inner ring portion, a straight portion arranged around the first folded ring, a second folded ring arranged around the straight portion, and a fixed portion connected to the outer side of the second folded ring, the fixed portion is connected to the outer shell, the straight portion is connected to the skeleton, the inner ring portion is formed with an inner ring hole, the inner ring portion is connected to the third magnetic group, and at least a portion of the third magnetic group is protruded from the inner ring hole.

[0035] In one embodiment, the inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure;

[0036] And / or, the first fold ring protrudes in a direction away from the magnetic yoke, and the second fold ring protrudes in a direction close to the magnetic yoke;

[0037] And / or, the diaphragm further comprises a reinforcement portion, wherein the reinforcement portion is disposed between the straight portion and the frame;

[0038] And / or, one end of the fixing portion away from the second fold ring is bent and extended toward the shell to form a bent portion, and the bent portion is connected to the outer wall of the shell.

[0039] The utility model also provides an electronic device, which includes the sound-generating device mentioned above.

[0040] The sound-generating device of the technical solution of the utility model is provided by setting the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part provided on the magnetic yoke, so that the side magnetic part is located on the outside of the central magnetic part and is spaced from the central magnetic part to form a magnetic gap, and the voice coil of the vibration system is provided corresponding to the magnetic gap, so that current is passed through the voice coil, so that the voice coil vibrates in the magnetic field formed by the magnetic circuit system and drives the diaphragm to vibrate and produce sound; at the same time, by setting the central magnetic part as the first magnetic group, the second magnetic group and the third magnetic group stacked on the magnetic yoke, the first magnetic group and the third magnetic group are both arranged along the vibration direction of the vibration system The second magnetic group is magnetized in a vertical direction, and the magnetizing direction of the second magnetic group is perpendicular to the magnetizing directions of the first magnetic group and the third magnetic group, so that the central magnetic part forms a Halbach magnetic circuit. The Halbach magnetic circuit formed by the central magnetic part can effectively improve the magnetic field strength, increase the density of the magnetic flux in the magnetic gap, increase the number of magnetic lines of force passing through the voice coil, increase the magnetic field force on the voice coil, effectively improve the BL value, improve the sensitivity of the sound-emitting device, effectively improve the flatness of the BL curve, significantly improve the FR frequency response curve, and effectively reduce the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0042] Figure 1 A structural schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0043] Figure 2 A structural schematic diagram of another perspective of an embodiment of a sound-generating device provided by the utility model;

[0044] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0045] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0046] Figure 5 A partial structural schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0047] Figure 6 This is an exploded schematic diagram of an embodiment of the central magnetic part provided by the utility model;

[0048] Figure 7 A schematic diagram of a top view of the structure of an embodiment of a second magnetic group and a voice coil provided by the utility model;

[0049] Figure 8 A schematic diagram of a top view of another embodiment of the second magnetic group and the voice coil provided by the utility model;

[0050] Fig. 9 A schematic diagram of a top view of the structure of a second magnetic group according to an embodiment of the present invention;

[0051] Fig.10 A schematic diagram of a top view of another embodiment of the second magnetic group provided by the utility model;

[0052] Fig.11 A comparison chart of the BL curves of the sound-generating device provided by the utility model and the prior art;

[0053] Fig.12 This is a comparison chart of the FR curves of the sound-generating device provided by the utility model and the prior art.

[0054] Description of Figure Numbers:

[0055] 100. Sounding device; 1. Shell; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Central magnetic part; 221. First magnetic group; 2211. First magnet; 222. Second magnetic group; 2221. Second magnet; 2222. Third magnet; 223. Third magnetic group; 2231. Fourth magnet; 2232. Central part; 2233. Edge; 2234. Protrusion; 23. Side magnetic part; 231. Side magnet; 232. Side magnetic plate; 24. Magnetic Gap; 3. Vibration system; 31. Diaphragm; 311. Inner ring; 312. Inner ring hole; 313. First folded ring; 314. Straight portion; 315. Second folded ring; 316. Fixed portion; 317. Bent portion; 318. Reinforcement portion; 32. Voice coil; 321. Long side; 322. Short side; 33. Skeleton; 331. Main body; 332. Connecting portion; 34. Centering support plate; 341. External fixed portion; 342. Internal fixed portion; 343. Elastic wall portion.

[0056] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0060] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0061] In recent years, convenient electronic devices (such as mobile phones, headphones, and computers) have become part of people's daily lives. With the rapid development of technology, people's demand for the sound quality of electronic devices has become higher and higher, and full-range and miniaturized speakers have become mainstream demands.

[0062] At present, the box space in electronic devices is getting smaller and smaller. The BL value of the sound-generating device is limited by the space size, resulting in a small number of magnetic lines passing through the voice coil, which leads to a smaller magnetic field force on the voice coil, low sensitivity of the sound-generating device, and poor overall acoustic performance and sound effects.

[0063] Based on the above ideas and problems, the present invention proposes a sound device 100. It can be understood that the sound device 100 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, speakers, computers, headphones or televisions, etc., which are not limited here.

[0064] Please refer to Figures 1 to 10As shown, in the embodiment of the utility model, the sound-generating device 100 includes a magnetic circuit system 2 and a vibration system 3, the magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 arranged on the magnetic yoke 21, the side magnetic portion 23 is located on the outside of the central magnetic portion 22, and is spaced from the central magnetic portion 22 to form a magnetic gap 24, the central magnetic portion 22 includes a first magnetic group 221, a second magnetic group 222 and a third magnetic group 223 which are stacked, the first magnetic group 221 is connected to the magnetic yoke 21, the vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31, and the voice coil 32 is arranged corresponding to the magnetic gap 24; wherein the first magnetic group 221 and the third magnetic group 223 are both magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization directions of the first magnetic group 221 and the third magnetic group 223, so that the central magnetic portion 22 forms a Halbach magnetic circuit.

[0065] In this embodiment, the sound-generating device 100 may be a sound-generating unit of a speaker, and the speaker may be a micro speaker. Of course, the sound-generating device 100 may also be a speaker module, that is, a sound-generating module structure, which is not limited here.

[0066] It should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged relative to each other. Of course, in other embodiments, in order to further reduce the Z-direction size of the electronic device, the Z-direction height of the sound-generating device 100 itself can be used to increase the Z-direction height of the magnetic circuit system 2 of the sound-generating device 100, that is, a through structure for the magnetic circuit system 2 to protrude is provided in the center of the vibration system 3, and at least part of the magnetic circuit system 2 protrudes from the through structure in the center of the vibration system 3, and the center of the vibration system 3 is connected and fixed to the magnetic circuit system 2, which is not limited here.

[0067] Optionally, the magnetic circuit system 2 may be arranged in a square shape. For example, the magnetic circuit system 2 may include a central magnetic portion 22 and a side magnetic portion 23, both of which are square structures. The vibration system 3 may optionally be arranged in a square shape. It is understandable that the periphery of the diaphragm 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be respectively assembled on a housing or a module housing, etc., which is not limited here.

[0068] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In one embodiment, as Figures 1 to 5 As shown, the sound-generating device 100 further includes a housing 1 , a magnetic circuit system 2 connected to one end of the housing 1 , and a vibration system 3 connected to the other end of the housing 1 , that is, the periphery of a diaphragm 31 of the vibration system 3 is connected to the other end of the housing 1 .

[0069] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or a plurality of split structures, which is not limited here. The housing 1 in this embodiment can be selected as a square frame or frame structure, that is, the housing 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the housing 1, so that the magnetic circuit system 2, the housing 1 and the diaphragm 31 of the vibration system 3 enclose a vibration cavity.

[0070] It can be understood that the sound-generating device 100 is applied to electronic devices, that is, 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 housing or box structure independent of the electronic device. In this case, the housing 1 is used to integrate the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 into an integral structure, so as to facilitate disassembly and assembly. Of course, the housing 1 of the sound-generating device 100 can also be an integrally formed structure with the housing or box structure of the electronic device, which can effectively improve the structural strength and sealing performance.

[0071] In this embodiment, the housing 1 is used to accommodate and fix the vibration system 3 and the magnetic circuit system 2 and other structures, so that the sound device 100 can be used as an independent component in an electronic device or a sound module, which is not limited here. Of course, in other embodiments, the sound device 100 can also be a module structure, in which case the vibration system 3 and the magnetic circuit system 2 and other structures of the sound unit are installed as multiple independent components on the housing 1 of the module structure, which is not limited here.

[0072] It can be understood that by configuring the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the housing 1 through the periphery of the magnetic yoke 21; or, the magnetic circuit system 2 can be connected to the housing 1 through the side magnetic portion 23, which is not limited here. In this embodiment, the side magnetic portion 23 is located outside the central magnetic portion 22 and is enclosed with the central magnetic portion 22 to form a magnetic gap 24, so that the diaphragm 31 of the vibration system 3 is connected to the end of the housing 1 away from the magnetic yoke 21, and is opposite to and spaced from the magnetic circuit system 2, so that one end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is arranged corresponding to the magnetic gap 24.

[0073] It should be noted that the voice coil 32 can be a flat voice coil, in which case it is fixed to the side of the diaphragm 31 facing the magnetic circuit system 2, and is opposite to and spaced from the magnetic gap 24 of the magnetic circuit system 2, that is, the other end of the voice coil 32 is located outside the magnetic gap 24, and along the vibration direction of the vibration system 3, the other end of the voice coil 32 is opposite to the magnetic gap 24; or, the voice coil 32 is in the shape of an annular cylinder, in which case one end of the voice coil 32 is connected to the diaphragm 31, and the other end of the voice coil 32 is suspended in the magnetic gap 24, which is not limited here.

[0074] In order to realize the electrical connection between the voice coil 32 and the external circuit. Figures 2 to 5 As shown, the vibration system 3 further includes a centering support plate 34 , one end of which is connected to the voice coil 32 and is connected and conducted with the lead wire of the voice coil 32 , and the other end of the centering support plate 34 is connected to the housing 1 .

[0075] It can be understood that the two ends of the centering support 34 are electrically connected to the lead wires of the voice coil 32 and the external circuit respectively. In this embodiment, the centering support 34 can be arranged at the bottom of the voice coil 32, and the centering support 34 is located at the four corners of the sound-generating device 100 or in the short axis or long axis direction of the sound-generating device 100. Of course, the centering support 34 can also be arranged at the top of the voice coil 32, and the centering support 34 is located between the voice coil 32 and the diaphragm 31, which is not limited here.

[0076] In this embodiment, by setting the central magnetic part 22 to be a first magnetic group 221, a second magnetic group 222 and a third magnetic group 223 stacked on the magnetic yoke 21, the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization directions of the first magnetic group 221 and the third magnetic group 223, so that the central magnetic part 22 forms a Halbach magnetic circuit, forming a magnetic field with a higher magnetic field strength, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines of force passing through the voice coil 32, and increasing the magnetic field force on the voice coil 32, thereby effectively improving the BL value, improving the sensitivity of the sound-generating device 100, and effectively improving the flatness of the BL curve (such as Fig.11 As shown), the FR frequency response curve is significantly improved (as shown Fig.12 As shown in the figure, the harmonic distortion THD is effectively reduced, which improves the sound effect and performance of the whole machine.

[0077] It should be noted that Fig.11 This is a comparison diagram of the BL curve of the sound-emitting device 100 of the present application and the BL curve of an existing conventional speaker, where the horizontal axis of the BL curve is the amplitude mm and the vertical axis is the BL value Tm. It can be seen that the BL curve of the sound-emitting device 100 of the present application is more symmetrical than the BL curve of the existing conventional speaker, and the BL value of the sound-emitting device 100 of the present application is higher than the BL value of the existing conventional speaker. Fig.12This is a comparison diagram of the FR curve of the sound-generating device 100 of the present application and the FR curve of the conventional speaker of the prior art, where the horizontal coordinate of the FR curve is Hz and the vertical coordinate is db. It can be seen that when the frequency is less than 1000 Hz, the FR curve of the sound-generating device 100 of the present application is significantly higher than the FR curve of the conventional speaker of the prior art; when the frequency is greater than 1000 Hz to about 10000 Hz, the FR curve of the sound-generating device 100 of the present application is also significantly higher than the FR curve of the conventional speaker of the prior art.

[0078] Optionally, the vibration direction of the vibration system 3 in this embodiment can be selected as a vertical direction. In this embodiment, the central magnetic portion 22 is configured as a first magnetic group 221, a second magnetic group 222 and a third magnetic group 223 stacked on the magnetic yoke 21, that is, the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 are stacked on the magnetic yoke 21 along the vertical direction.

[0079] Optionally, the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are magnetized in the vertical direction. It can be understood that the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization directions of the first magnetic group 221 and the third magnetic group 223, that is, the second magnetic group 222 is magnetized in the horizontal direction. It should be noted that Figure 4 , Figure 5 , Figures 7 to 10 The direction of the arrow in the middle magnetic circuit system 2 is the direction from the S pole to the N pole, that is, the magnetization direction.

[0080] It can be understood that the central magnetic part 22 forms a Halbach magnetic array, which can generate a strong magnetic field. The magnetic field generated by the Halbach magnetic array drives the voice coil 32 to drive the diaphragm 31 to vibrate and produce sound, so that there is a strong magnetic field at the voice coil 32, which is conducive to improving the sensitivity of controlling the vibration of the diaphragm 31; and the Halbach magnetic array allows the magnetic flux lines at the voice coil 32 to be evenly distributed and the magnetic field change in the vibration direction of the diaphragm 31 has good linearity, which can effectively improve the sound quality of the audio output by the sound device 100, enhance the treble effect, and alleviate the distortion of the audio output by the sound device 100 to a certain extent. Among them, the vibration of the diaphragm 31 is specifically that the edge of the diaphragm 31 is fixed, and the surface of the diaphragm 31 reciprocates in a direction perpendicular to the surface of the diaphragm 31.

[0081] In this embodiment, the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 are stacked along the moving direction of the voice coil 32, that is, the first magnetic group 221 is connected to the magnetic yoke 21, the second magnetic group 222 is stacked on the side of the first magnetic group 221 facing away from the magnetic yoke 21, and the third magnetic group 223 is stacked on the side of the second magnetic group 222 facing away from the first magnetic group 221.

[0082] Optionally, the first magnetic group 221 , the second magnetic group 222 and the third magnetic group 223 of the central magnetic portion 22 are in a square plate-shaped structure, which is not limited here.

[0083] In this embodiment, if Figures 3 to 6 As shown, by magnetizing the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 in the vertical direction, and the magnetizing direction of the second magnetic group 222 is perpendicular to the magnetizing directions of the first magnetic group 221 and the third magnetic group 223, the first magnetic group 221, the second magnetic group 222 and the third magnetic group 223 of the central magnetic part 22 are used to form a Halbach magnetic array, forming a magnetic field with a higher magnetic field strength, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic lines of force passing through the voice coil 32, increasing the magnetic field force on the voice coil 32, effectively improving the BL value, and improving the sensitivity of the sound-generating device 100, so that the sound effect and performance of the whole machine are better improved.

[0084] It can be understood that the first magnetic group 221 and the third magnetic group 223 are both magnetized along the vibration direction of the vibration system 3, that is, they are both magnetized along the moving direction of the voice coil 32. Optionally, the first magnetic group 221 and the third magnetic group 223 are both magnetized in the vertical direction. In this embodiment, the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are both magnetized in the vertical direction, and the magnetization direction of the second magnetic group 222 is perpendicular to the magnetization direction of the first magnetic group 221 and the third magnetic group 223, that is, the second magnetic group 222 is magnetized in the horizontal direction, and the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are both magnetized in the vertical direction, so as to effectively superimpose and form a magnetic field with a higher magnetic field strength.

[0085] In one embodiment, the magnetization direction of the first magnetic group 221 is opposite to the magnetization direction of the third magnetic group 223. Figure 4 As shown, when the first magnetic group 221 is magnetized from bottom to top, the third magnetic group 223 is magnetized from top to bottom, that is, when the N pole of the first magnetic group 221 is at the top and the S pole is at the bottom, the N pole of the third magnetic group 223 is at the bottom and the S pole is at the top; or, when the first magnetic group 221 is magnetized from top to bottom, the third magnetic group 223 is magnetized from bottom to top, that is, when the N pole of the first magnetic group 221 is at the bottom and the S pole is at the top, the N pole of the third magnetic group 223 is at the top and the S pole is at the bottom, which is not limited here.

[0086] Optionally, the magnetic pole of the first magnetic group 221 close to the second magnetic group 222 is the same as the magnetic pole of the third magnetic group 223 close to the second magnetic group 222 .

[0087] It can be understood that the magnetization direction of the first magnetic group 221 is opposite to the magnetization direction of the third magnetic group 223, so that the magnetic flux lines of the first magnetic group 221 and the third magnetic group 223 of the central magnetic part 22 are gathered in the second magnetic group 222, and the magnetic field with a stronger magnetic field strength generated by the central magnetic part 22 passes through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, increasing the number of magnetic flux lines passing through the voice coil 32, and increasing the magnetic field force on the voice coil 32, thereby effectively improving the BL value.

[0088] In one embodiment, the second magnetic group 222 is magnetized along a vibration direction perpendicular to the vibration system 3, and the magnetization direction of the second magnetic group 222 is along the periphery of the second magnetic group 222 toward the center of the second magnetic group 222; or, the second magnetic group 222 has a first axis and a second axis perpendicular to the vibration direction of the vibration system 3, and the first axis and the second axis are perpendicular to each other, and the magnetization direction of the second magnetic group 222 is along the first axis and / or the second axis.

[0089] In this embodiment, if Figure 4 , Figure 5 , Figures 7 to 10 As shown, the vibration direction of the vibration system 3 can be selected as the vertical direction, and the vibration direction perpendicular to the vibration system 3 can be selected as the horizontal direction. When the second magnetic group 222 is magnetized in the horizontal direction, the magnetization direction of the second magnetic group 222 can be from the voice coil 32 to the center of the second magnetic group 222, that is, the S pole of the second magnetic group 222 faces the voice coil 32, and the N pole is located at the center of the second magnetic group 222; or, the magnetization direction of the second magnetic group 222 can be from the center of the second magnetic group 222 to the voice coil 32, that is, the S pole of the second magnetic group 222 is located at the center of the second magnetic group 222, and the N pole faces the voice coil 32; or, as Figure 5 , Figure 7 , Figure 8 and Fig.10 As shown, the magnetization direction of the second magnetic group 222 may be along the cross axis, which is not limited here.

[0090] Understandable, such as Figure 4 , Figure 5 , Figures 7 to 10 As shown, when the magnetization direction of the second magnetic group 222 is from the center of the second magnetic group 222 to the periphery of the second magnetic group 222, the first magnetic group 221 of the central magnetic part 22 is magnetized from bottom to top, and the third magnetic group 223 is magnetized from top to bottom. When the magnetization direction of the second magnetic group 222 is from the periphery of the second magnetic group 222 to the center of the second magnetic group 222, the first magnetic group 221 of the central magnetic part 22 is magnetized from top to bottom, and the third magnetic group 223 is magnetized from bottom to top, which is not limited here.

[0091] Optionally, the magnetic poles on the inner side of the second magnetic group 222 close to the center thereof are the same as the magnetic poles on the side of the first magnetic group 221 away from the second magnetic group 222 .

[0092] In one embodiment, the second magnetic group 222 includes an integral second magnet 2221 of a plate-like structure, and a through hole is opened at the center of the second magnet 2221 of the plate-like structure.

[0093] In this embodiment, if Fig. 9 As shown, the second magnetic group 222 may be a second magnet 2221, which is arranged in a square or rectangular plate-like structure. It can be understood that in order to facilitate magnetization, a through hole is provided in the center of the second magnet 2221.

[0094] The sound-generating device 100 of the utility model is provided with a magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke, so that the side magnetic portion 23 is located outside the central magnetic portion 22 and is spaced from the central magnetic portion 22 to form a magnetic gap 24, and the voice coil 32 of the vibration system 3 is provided corresponding to the magnetic gap 24, so that a current is passed through the voice coil 32, so that the voice coil 32 vibrates in the magnetic field formed by the magnetic circuit system 2 and drives the diaphragm 31 to vibrate and produce sound; at the same time, the central magnetic portion 22 of the central magnetic portion 22 is provided as a first magnetic group 221, a second magnetic group 222 and a third magnetic group 223 which are stacked on the magnetic yoke 21, so that the first magnetic group 221 and the third magnetic group 223 are provided. The groups 223 are all magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the second magnetic group 222 is arranged perpendicular to the magnetization directions of the first magnetic group 221 and the third magnetic group 223, so that the central magnetic part 22 forms a Halbach magnetic circuit. The Halbach magnetic circuit formed by the central magnetic part 22 can effectively improve the magnetic field strength, increase the density of the magnetic flux in the magnetic gap 24, increase the number of magnetic lines of force passing through the voice coil 32, increase the magnetic field force on the voice coil 32, effectively improve the BL value, improve the sensitivity of the sound-generating device 100, effectively improve the flatness of the BL curve, significantly improve the FR frequency response curve, and effectively reduce the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved.

[0095] In one embodiment, the edge magnet portion 23 includes a stacked edge magnet 231 and a edge magnetic conductive plate 232, and the edge magnet 231 is connected to the magnetic conductive yoke 21; the first magnetic group 221, the third magnetic group 223 and the edge magnet 231 are all magnetized along the vibration direction of the vibration system 3, the magnetization direction of the first magnetic group 221 is opposite to the magnetization direction of the edge magnet 231 of the edge magnet portion 23, and the magnetization direction of the third magnetic group 223 is the same as the magnetization direction of the edge magnet 231 of the edge magnet portion 23.

[0096] In this embodiment, if Figures 2 to 5As shown, the side magnets 231 and the side magnetic plates 232 of the side magnetic part 23 are stacked on the magnetic yoke 21, and the side magnets 231 are connected to the magnetic yoke 21. The side magnets 231 and the side magnetic plates 232 of the side magnetic part 23 are located outside the central magnetic part 22 and are spaced to form a magnetic gap 24.

[0097] Optionally, the magnetic pole of the side magnet 231 close to the side magnetic conductive plate 232 is opposite to the magnetic pole of the first magnetic group 221 close to the second magnetic group 222, and the magnetic pole of the side magnet 231 close to the side magnetic conductive plate 232 is opposite to the magnetic pole of the third magnetic group 223 close to the second magnetic group 222.

[0098] In one embodiment, the edge magnet portion 23 may be arranged in an annular shape, in which case the annular edge magnet portion 23 is located outside the central magnet portion 22 and is spaced apart from the central magnet portion 22 to form a magnetic gap 24. Optionally, the edge magnet 231 and / or the edge magnetic conductive plate 232 form a closed integral annular structure.

[0099] Of course, in other embodiments, the edge magnetic part 23 includes a plurality of edge magnetic parts 23, which are arranged around the outside of the central magnetic part 22 and are spaced apart from the central magnetic part 22 to form a magnetic gap 24. Optionally, there are a plurality of edge magnets 231 and edge magnetic conductive plates 232, which are arranged one by one, and adjacent edge magnets 231 are connected end to end to form a closed ring structure. Alternatively, there are multiple side magnets 231 and side magnetic conductive plates 232, and they are arranged in one-to-one correspondence, and adjacent side magnets 231 are spaced to form an annular structure with a gap, and adjacent side magnetic conductive plates 232 are spaced to form an annular structure with a gap; or, the side magnets 231 form a closed integral annular structure, there are multiple side magnetic conductive plates 232, adjacent side magnetic conductive plates 232 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular side magnets 231; or, the side magnetic conductive plates 232 form a closed integral annular structure, there are multiple side magnets 231, adjacent side magnets 231 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular side magnetic conductive plates 232, which is not limited here.

[0100] It should be noted that, in order to facilitate the installation of the centering support piece 34, multiple side magnets 23 are arranged around the outside of the central magnet part 22, and a gap is provided between two adjacent side magnets 23 for avoiding the centering support piece 34, which is not limited here.

[0101] In this embodiment, the side magnets 231 of the side magnet portion 23 and the first magnetic group 221 and the third magnetic group 223 of the central magnetic portion 22 are magnetized in the vertical direction, that is, they are magnetized in the moving direction of the voice coil 32. Optionally, the magnetization direction of the first magnetic group 221 is opposite to the magnetization direction of the side magnets 231 of the side magnet portion 23, and the magnetization direction of the third magnetic group 223 is the same as the magnetization direction of the side magnets 231 of the side magnet portion 23.

[0102] It can be understood that when the first magnetic group 221 is magnetized from bottom to top, the third magnetic group 223 and the side magnet 231 are magnetized from top to bottom, that is, when the N pole of the first magnetic group 221 is at the top and the S pole is at the bottom, the N pole of the third magnetic group 223 and the side magnet 231 are at the bottom and the S pole is at the top; or, when the first magnetic group 221 is magnetized from top to bottom, the third magnetic group 223 and the side magnet 231 are magnetized from bottom to top, that is, when the N pole of the first magnetic group 221 is at the bottom and the S pole is at the top, the N pole of the third magnetic group 223 and the side magnet 231 are at the top and the S pole is at the bottom, which is not limited here.

[0103] In one embodiment, at least a portion of the projection of the second magnetic group 222 along the vibration direction perpendicular to the vibration system 3 coincides with the projection of the voice coil 32 along the vibration direction perpendicular to the vibration system 3. It can be understood that such a configuration enables the magnetic flux lines of the first magnetic group 221 and the third magnetic group 223 of the central magnetic portion 22 to gather at the second magnetic group 222 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, so that the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100. Optionally, the projection of the second magnetic group 222 along the horizontal direction is located in the projection of the voice coil 32 along the horizontal direction.

[0104] In one embodiment, the first magnetic group 221 includes an integral plate-shaped first magnet 2211. It can be understood that such a configuration not only facilitates the processing of the first magnet 2211, but also facilitates assembly and magnetization, and effectively improves production and assembly efficiency.

[0105] In one embodiment, the first magnetic group 221 includes a plurality of first magnets 2211, which are arranged adjacent to each other and located between the second magnetic group 222 and the magnetic yoke 21; wherein the plurality of first magnets 2211 are magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the plurality of first magnets 2211 are the same.

[0106] In this embodiment, if Figure 3 , Figure 4 and Figure 6 As shown, by setting the first magnetic group 221 to multiple first magnets 2211, the multiple first magnets 2211 are laid flat between the magnetic yoke 21 and the second magnetic group 222. Optionally, the multiple first magnets 2211 are magnetized in the vertical direction, and the magnetization directions of the multiple first magnets 2211 are the same. That is, the multiple first magnets 2211 are magnetized in the direction of movement of the voice coil 32, and the multiple first magnets 2211 are magnetized upward or downward at the same time, which is not limited here. Optionally, the magnetic poles of the multiple first magnets 2211 close to the second magnetic group 222 are the same.

[0107] It can be understood that the first magnetic group 221 can be an integral first magnet 2211 of a square plate-like structure, which is arranged between the magnetic yoke 21 and the second magnetic group 222; or, the first magnetic group 221 includes a plurality of first magnets 2211, and the plurality of first magnets 2211 are adjacently and parallelly arranged between the second magnetic group 222 and the magnetic yoke 21, so that the plurality of first magnets 2211 cooperate to form a square plate-like structure, which is not limited here.

[0108] In this embodiment, the voice coil 32 is in a rectangular ring shape, and has a long side 321 and a short side 322 connected end to end. Optionally, a plurality of first magnets 2211 are arranged adjacently and in parallel along the direction of the long side 321; or, a plurality of first magnets 2211 are arranged adjacently and in parallel along the direction of the short side 322; or, a portion of the first magnets 2211 are arranged adjacently and in parallel along the direction of the long side 321, and another portion of the first magnets 2211 are arranged at both ends of a portion of the first magnets 2211 along the direction of the short side 322, or vice versa, which is not limited here.

[0109] In one embodiment, the voice coil 32 is in a rectangular ring shape, and has a long side 321 and a short side 322 connected end to end; the second magnetic group 222 includes two second magnets 2221, and the two second magnets 2221 are adjacent to and arranged in parallel along the direction of the long side 321. The two second magnets 2221 are magnetized along the direction of the long side 321, and the magnetization directions of the two second magnets 2221 are opposite.

[0110] In this embodiment, if Figure 7 As shown, by configuring the second magnetic group 222 to include two second magnets 2221 , the two second magnets 2221 are laid out along the direction of the long side 321 and are located between the first magnetic group 221 and the third magnetic group 223 .

[0111] Optionally, both second magnets 2221 are magnetized in the horizontal direction, and the magnetization directions of the two second magnets 2221 are opposite. The two second magnets 2221 are adjacent and arranged in parallel along the direction of the long side 321. The two second magnets 2221 are magnetized from the voice coil 32 in the direction of the sides where the two second magnets 2221 abut against each other; or, the two second magnets 2221 are magnetized from the sides where the two second magnets 2221 abut against each other in the direction of the voice coil 32, which is not limited here. In this embodiment, the magnetic poles of the two second magnets 2221 facing the magnetic gap 24 are the same.

[0112] It can be understood that the second magnetic group 222 can be an integral second magnet 2221 of a square plate-like structure, and is arranged between the first magnetic group 221 and the third magnetic group 223; or, the second magnetic group 222 includes a plurality of second magnets 2221, and the plurality of second magnets 2221 are adjacent to each other and arranged in parallel along the direction of the long side 321 between the first magnetic group 221 and the third magnetic group 223, so that the plurality of second magnets 2221 cooperate to form a square plate-like structure, which is not limited here.

[0113] Optionally, the multiple second magnets 2221 of the second magnetic group 222 are magnetized in the horizontal direction, the magnetization directions of the multiple second magnets 2221 are perpendicular to the length extension direction of each second magnet 2221, and the polarities of the ends of the long sides of the multiple second magnets 2221 facing the voice coil 32 are all N poles or all S poles, which is not limited here.

[0114] In one embodiment, the voice coil 32 is in a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 connected end to end. The second magnetic group 222 includes two second magnets 2221, and the two second magnets 2221 are adjacent to and arranged in parallel along the direction of the short side 322. The two second magnets 2221 are magnetized along the direction of the short side 322, and the magnetization directions of the two second magnets 2221 are opposite.

[0115] In this embodiment, if Figure 8 As shown, by configuring the second magnetic group 222 to include two second magnets 2221 , the two second magnets 2221 are laid out along the short side 322 and are located between the first magnetic group 221 and the third magnetic group 223 .

[0116] Optionally, both second magnets 2221 are magnetized in the horizontal direction, and the magnetization directions of the two second magnets 2221 are opposite. The two second magnets 2221 are adjacent and arranged in parallel along the direction of the short side 322. The two second magnets 2221 are magnetized from the voice coil 32 in the direction of the sides where the two second magnets 2221 abut against each other; or, the two second magnets 2221 are magnetized from the sides where the two second magnets 2221 abut against each other in the direction of the voice coil 32, which is not limited here. In this embodiment, the magnetic poles of the two second magnets 2221 facing the magnetic gap 24 are the same.

[0117] It can be understood that the second magnetic group 222 can be an integral second magnet 2221 of a square plate-like structure, and is arranged between the first magnetic group 221 and the third magnetic group 223; or, the second magnetic group 222 includes a plurality of second magnets 2221, and the plurality of second magnets 2221 are adjacent to and arranged in parallel between the first magnetic group 221 and the third magnetic group 223 along the direction of the short side 322, so that the plurality of second magnets 2221 cooperate to form a square plate-like structure, which is not limited here.

[0118] Optionally, the multiple second magnets 2221 of the second magnetic group 222 are magnetized in the horizontal direction, the magnetization directions of the multiple second magnets 2221 are perpendicular to the length extension direction of each second magnet 2221, and the polarities of the ends of the long sides of the multiple second magnets 2221 facing the voice coil 32 are all N poles or all S poles, which is not limited here.

[0119] In one embodiment, the voice coil 32 is in a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 connected end to end. The second magnetic group 222 includes two second magnets 2221 and two third magnets 2222. The two second magnets 2221 are adjacent to and arranged in parallel along the direction of the short side 322. The two third magnets 2222 are arranged at both ends of the two second magnets 2221 along the direction of the long side 321. The two second magnets 2221 and the two third magnets 2222 are magnetized along the direction of the short side 322 and the direction of the long side 321, respectively. The magnetization directions of the two second magnets 2221 are opposite, and the magnetization directions of the two third magnets 2222 are opposite.

[0120] In this embodiment, the polarities of the ends of the two second magnets 2221 and the two third magnets 2222 facing the voice coil 32 are both N poles or both S poles. Figure 5 As shown, the two second magnets 2221 and the two third magnets 2222 of the second magnetic group 222 are laid horizontally and located between the first magnetic group 221 and the third magnetic group 223, and the two second magnets 2221 are adjacent and arranged in parallel along the direction of the short side 322, and the two third magnets 2222 are arranged at both ends of the two second magnets 2221 along the direction of the long side 321.

[0121] Optionally, the two second magnets 2221 and the two third magnets 2222 are magnetized in the horizontal direction, the magnetizing directions of the two second magnets 2221 are opposite, the magnetizing directions of the two third magnets 2222 are opposite, and the magnetizing directions of the two second magnets 2221 and the two third magnets 2222 are perpendicular to their respective length extension directions, and the polarities of the ends of the two second magnets 2221 and the two third magnets 2222 facing the voice coil 32 are both N poles or both S poles, which are not limited here.

[0122] In this embodiment, the second magnet 2221 and the third magnet 2222 of the second magnetic group 222 can be an integral square bar or plate structure; or, the second magnet 2221 and the third magnet 2222 each include a plurality of second magnets 2221 and a plurality of third magnets 2222, respectively, adjacent to each other along the long side 321 and the short side 322 and arranged in parallel between the first magnetic group 221 and the third magnetic group 223, so that the plurality of second magnets 2221 and the plurality of third magnets 2222 cooperate to form a square bar or plate structure, which is not limited here.

[0123] In one embodiment, the voice coil 32 is in a rectangular ring shape, and the voice coil 32 has a long side 321 and a short side 322 connected end to end. The second magnetic group 222 is divided along two diagonal lines to form two second magnets 2221 and two third magnets 2222. The two second magnets 2221 are arranged in parallel along the direction of the short side 322, and the two third magnets 2222 are arranged in parallel along the direction of the long side 321. The two second magnets 2221 and the two third magnets 2222 are magnetized in the direction of the short side 322 and the direction of the long side 321, respectively. The magnetization directions of the two second magnets 2221 are opposite, and the magnetization directions of the two third magnets 2222 are opposite.

[0124] In this embodiment, if Fig.10 As shown, the upper and lower surfaces of the second magnetic group 222 are generally rectangular, and the second magnetic group 222 is divided along two diagonal lines to form two second magnets 2221 and two third magnets 2222. The two second magnets 2221 and the two third magnets 2222 can be formed by cutting a second magnetic group 222, or can be formed by combining split structures to form the second magnetic group 222. Optionally, the two second magnets 2221 are arranged in parallel along the direction of the short side 322, and the two third magnets 2222 are arranged in parallel along the direction of the long side 321. The two second magnets 2221 and the two third magnets 2222 are magnetized in the direction of the short side 322 and the direction of the long side 321, respectively, and the magnetization directions of the two second magnets 2221 are opposite.

[0125] Optionally, the magnetization directions of the two third magnets 2222 are opposite. The polarities of the ends of the two second magnets 2221 and the two third magnets 2222 facing the voice coil 32 are both N poles or both S poles. The two second magnets 2221 and the two third magnets 2222 of the second magnetic group 222 are laid horizontally and located between the first magnetic group 221 and the third magnetic group 223. Optionally, the two second magnets 2221 are symmetrically arranged at the intersection of the two diagonals of the second magnetic group 222, and the two third magnets 2222 are symmetrically arranged at the intersection of the two diagonals of the second magnetic group 222.

[0126] It can be understood that the second magnetic group 222 and the third magnet 2222 are both arranged in a triangle shape, so that the vertex angles of the two second magnets 2221 and the two third magnets 2222 coincide with the intersection of the two diagonals of the second magnetic group 222 .

[0127] Optionally, the two second magnets 2221 and the two third magnets 2222 are magnetized in the horizontal direction, the magnetizing directions of the two second magnets 2221 are opposite, the magnetizing directions of the two third magnets 2222 are opposite, and the magnetizing directions of the two second magnets 2221 and the two third magnets 2222 are perpendicular to the direction of the bottom edge relative to the intersection of the two diagonals of the second magnetic group 222, and the polarities of the ends of the two second magnets 2221 and the two third magnets 2222 facing the voice coil 32 are both N poles or both S poles, which are not limited here.

[0128] In one embodiment, the third magnetic group 223 includes a plurality of fourth magnets 2231, which are arranged adjacent to each other and located on the side of the second magnetic group 222 facing away from the first magnetic group 221; wherein the plurality of fourth magnets 2231 are all magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the plurality of fourth magnets 2231 are the same.

[0129] In this embodiment, if Figure 3 , Figure 4 and Figure 6 As shown, by setting the third magnetic group 223 to a plurality of fourth magnets 2231, the plurality of fourth magnets 2231 are laid flat on the side of the second magnetic group 222 facing away from the second magnetic group 222. Optionally, the plurality of fourth magnets 2231 are magnetized in the vertical direction, and the magnetization directions of the plurality of fourth magnets 2231 are the same. That is, the plurality of fourth magnets 2231 are magnetized in the direction of movement of the voice coil 32, and the plurality of fourth magnets 2231 are magnetized upward or downward at the same time, which is not limited here. Optionally, the magnetic poles of the plurality of fourth magnets 2231 close to the second magnetic group 222 are the same.

[0130] It can be understood that the third magnetic group 223 can be an integral square plate-shaped fourth magnet 2231, which is arranged on the side of the second magnetic group 222 facing away from the second magnetic group 222; or, the third magnetic group 223 includes a plurality of fourth magnets 2231, and the plurality of fourth magnets 2231 are adjacently and parallelly arranged on the side of the second magnetic group 222 facing away from the second magnetic group 222, so that the plurality of fourth magnets 2231 cooperate to form a square plate-shaped structure, which is not limited here.

[0131] In this embodiment, the voice coil 32 is in a rectangular ring shape, and has a long side 321 and a short side 322 connected end to end. Optionally, a plurality of fourth magnets 2231 are arranged adjacently and in parallel along the direction of the long side 321; or, a plurality of fourth magnets 2231 are arranged adjacently and in parallel along the direction of the short side 322; or, a portion of the fourth magnets 2231 are arranged adjacently and in parallel along the direction of the long side 321, and another portion of the fourth magnets 2231 are arranged at both ends of a portion of the fourth magnets 2231 along the direction of the short side 322, or vice versa, which is not limited here.

[0132] In one embodiment, at least a portion of the side of the third magnetic group 223 facing away from the second magnetic group 222 is protruded toward a side facing away from the second magnetic group 222 to form a protrusion 2234 .

[0133] In this embodiment, if Figure 3 , Figure 4 and Figure 6 As shown, the third magnetic group 223 includes a central portion 2232 and an edge portion 2233, the edge portion 2233 is arranged around the periphery of the central portion 2232, and the central portion 2232 is protruded from the side of the edge portion 2233 facing away from the second magnetic group 222 and forms a protrusion 2234. Optionally, the central portion 2232 and the edge portion 2233 of the third magnetic group 223 are an integrally formed structure. Of course, in other embodiments, the central portion 2232 and the edge portion 2233 of the third magnetic group 223 can also be set as a split structure, which is not limited here.

[0134] Optionally, the thickness of the center portion 2232 along the moving direction of the voice coil 32 is optionally greater than the thickness of the edge portion 2233 along the moving direction of the voice coil 32. That is, the side surface of the center portion 2232 facing away from the second magnetic group 222 protrudes beyond the side surface of the edge portion 2233 facing away from the second magnetic group 222 to form a protruding portion 2234.

[0135] It can be understood that the vibration system 3 is provided with a through structure for the protrusion 2234 to pass through. When the sound-emitting device 100 is applied to an electronic device, in order to reduce the Z-direction height of the electronic device, the protrusion 2234 of the central magnetic portion 22 in the sound-emitting device 100 can be used to abut against the inner wall of the shell of the electronic device. There is no need to increase the front cavity space additionally. The front sound cavity structure can be formed by utilizing the height difference between the protrusion 2234 of the central magnetic portion 22 and the vibration system 3, which is not limited here.

[0136] Of course, in other implementations, the thickness of the center portion 2232 along the moving direction of the voice coil 32 may be the same as the thickness of the edge portion 2233 along the moving direction of the voice coil 32. The diaphragm 31 of the vibration system 3 is disposed opposite to and spaced from the center magnetic portion 22, which is not limited here.

[0137] In one embodiment, the third magnetic group 223 includes a central portion 2232 and an edge portion 2233, the edge portion 2233 is arranged around the outer periphery of the central portion 2232, the central portion 2232 protrudes on the side of the edge portion 2233 facing away from the second magnetic group 222 and forms a protrusion 2234; the edge portion 2233 forms a closed integral ring structure; or, the edge portion 2233 includes a plurality of adjacent edge portions 2233 connected end to end to form a closed ring structure; or, the edge portion 2233 includes a plurality of adjacent edge portions 2233 spaced apart to form a ring structure with a gap; or, the edge portion 2233 and the central portion 2232 are an integrally formed structure.

[0138] In this embodiment, if Figure 3 and Figure 6 As shown, the edge portion 2233 of the third magnetic group 223 includes a plurality of edge portions 2233, and the plurality of edge portions 2233 are arranged around the periphery of the center portion 2232. Optionally, adjacent edge portions 2233 are connected end to end to form a closed annular structure; or, a plurality of edge portions 2233 are arranged around and spaced around the periphery of the center portion 2232, and there are gaps between adjacent edge portions 2233, that is, a plurality of edge portions 2233 are spaced to form an annular structure with gaps. Of course, the edge portions 2233 can also form a closed integrated annular structure arranged around the periphery of the center portion 2232, which is not limited here.

[0139] It can be understood that, in order to facilitate processing and organization, the edge portion 2233 and the center portion 2232 of the third magnetic group 223 can be selected as an integrally formed structure.

[0140] In this embodiment, if Figure 3 and Figure 4 As shown, the diaphragm 31 may be annular, and the inner periphery of the diaphragm 31 is fixed to the end surface of the edge portion 2233 facing away from the second magnetic group 222. Optionally, the top surface of the diaphragm 31 facing away from the second magnetic group 222 is not higher than the top surface of the protrusion 2234 facing away from the second magnetic group 222. In this way, the overall thickness of the product can be reduced.

[0141] In one embodiment, the sound-generating device 100 also includes a shell 1, the edge magnetic portion 23 includes a stacked edge magnet 231 and an edge magnetic conductive plate 232, the edge magnet 231 is connected to the magnetic conductive yoke 21, one end of the shell 1 is connected to the edge magnetic conductive plate 232, and the other end of the shell 1 is connected to the periphery of the diaphragm 31.

[0142] Optionally, the side magnetic conductive plate 232 and the housing 1 are integrally formed. It is understandable that when the housing 1 is a plastic part, the side magnetic conductive plate 232 and the housing 1 are integrally injection molded. When the housing 1 is a metal part, the side magnetic conductive plate 232 and the housing 1 are formed by stamping, punching or riveting, which is not limited here. Such a setting can effectively simplify the processing steps and improve the heat dissipation effect.

[0143] In one embodiment, the diaphragm 31 is annular, the inner periphery of the diaphragm 31 is fixed to the magnetic circuit system 2 , one end of the voice coil 32 is connected to the diaphragm 31 , and the other end of the voice coil 32 is suspended in the magnetic gap 24 .

[0144] In this embodiment, the diaphragm 31 includes an inner ring portion 311, a first fold ring 313 disposed around the inner ring portion 311, a straight portion 314 disposed around the first fold ring 313, a second fold ring 315 disposed around the straight portion 314, and a fixing portion 316 connected to the outer side of the second fold ring 315, the fixing portion 316 is connected to the housing 1, and one end of the voice coil 32 is directly or indirectly connected to the straight portion 314. Optionally, the first fold ring 313 and the second fold ring 315 are in a convex structure protruding upward or a concave structure concave downward, which is not limited here.

[0145] In order to strengthen the structural strength of the central part of the diaphragm 31, the vibration system 3 also includes a vibration plate, which is arranged in the central part of the diaphragm 31. It is understandable that in order to reduce the weight of the vibration system 3, the central part of the diaphragm 31 is provided with a hollow hole, and the vibration plate is connected to the central part and covers the hollow hole. Optionally, a step surface is formed on the periphery of the vibration plate, and one side of the diaphragm 31 adjacent to the hollow hole is supported and connected to the step surface, and the step surface is located between the voice coil 32 and the diaphragm 31. It is understandable that by providing a step surface on the periphery of the vibration plate, the step surface is recessed toward one side of the voice coil 32, thereby ensuring that when the central part of the diaphragm 31 is overlapped and supported on the step surface of the vibration plate, the upper surface of the central part of the diaphragm 31 is flush with the upper surface of the vibration plate, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm 31.

[0146] In one embodiment, the vibration system 3 further includes a skeleton 33 , and the voice coil 32 is connected to the diaphragm 31 via the skeleton 33 .

[0147] In this embodiment, if Figure 3 and Figure 4 As shown, by providing the skeleton 33, the voice coil 32 is connected to the diaphragm 31 through the skeleton 33, so that the voice coil 32 can be ensured to be in a more reasonable magnetic field, that is, the area with the largest magnetic flux density, thereby effectively improving the BL value.

[0148] In one embodiment, the skeleton 33 includes a main body portion 331 and a connecting portion 332 connected to the periphery of the main body portion 331, and the main body portion 331 is arranged between the diaphragm 31 and the voice coil 32; the vibration system 3 also includes a centering support plate 34, and the centering support plate 34 includes an external fixing portion 341, an internal fixing portion 342 and an elastic wall portion 343 connecting the external fixing portion 341 and the internal fixing portion 342, the external fixing portion 341 is connected to the outer shell 1 and / or the edge magnetic portion 23, and the internal fixing portion 342 is connected to the connecting portion 332.

[0149] In this embodiment, if Figure 3 and Figure 4 As shown, the main body 331 of the skeleton 33 can be optionally an annular structure, that is, the main body 331 is arranged in an annular shape, and the main body 331 is arranged around the central magnetic part 22. Optionally, the main body 331 is arranged in a rectangular ring shape, and the connecting part 332 includes a plurality of connecting parts 332, and the plurality of connecting parts 332 are respectively arranged at the four corners of the main body 331.

[0150] It can be understood that by providing the centering support plate 34, the lead of the voice coil 32 can be connected to the external circuit by the centering support plate 34, and the voice coil 32 can be prevented from swinging or polarizing during vibration.

[0151] In one embodiment, the centering support plates 34 include a plurality of centering support plates 34, one ends of the plurality of centering support plates 34 are respectively connected to the connecting portions 332 of the frame 33, and the lead wires of the voice coil 32 extend along the connecting portions 332 to the centering support plates 34, and the other ends of the plurality of centering support plates 34 are respectively connected to the outer shell 1 and / or the edge magnetic portion 23, thereby improving the operating stability of the vibration system 3.

[0152] Optionally, multiple centering supports 34 are correspondingly distributed along the long axis direction and / or short axis direction of the magnetic circuit system 2 and / or the diagonal or four corner positions of the magnetic circuit system 2. It can be understood that multiple centering supports 34 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; multiple centering supports 34 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; multiple centering supports 34 can also be correspondingly arranged at the diagonal positions of the magnetic circuit system 2; multiple centering supports 34 can also be correspondingly arranged at the four corner positions of the magnetic circuit system 2. Of course, in other embodiments, multiple centering supports 34 can be correspondingly distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, which is not limited here.

[0153] Optionally, the centering support plates 34 include two or four. Such an arrangement can not only utilize the centering support plates 34 to connect the voice coil 32 to the external circuit, but also ensure the vibration balance of the sound-generating device 100 .

[0154] It can be understood that when there are two centering support pieces 34, the two centering support pieces 34 are arranged at intervals along the long axis direction of the magnetic circuit system 2; or, the two centering support pieces 34 are arranged at intervals along the short axis direction of the magnetic circuit system 2, which is not limited here. Of course, when there are four centering support pieces 34, the four centering support pieces 34 can also be arranged correspondingly along the four corners of the magnetic circuit system 2. The utility model does not specifically limit the arrangement of the centering support pieces 34.

[0155] In one embodiment, each centering support plate 34 includes an outer fixing portion 341, an elastic wall portion 343 and an inner fixing portion 342 which are connected in sequence. The outer fixing portion 341 is connected to the outer shell 1, and the inner fixing portion 342 is connected to the connecting portion 332. The inner fixing portion 342 is provided with an inner solder pad, and the lead of the voice coil 32 extends along the connecting portion 332 to the inner solder pad.

[0156] In this embodiment, if Figure 2 , Figure 3 , Figure 5 As shown, the outer fixing portion 341, the elastic wall portion 343 and the inner fixing portion 342 of the centering support 34 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support 34 and simplify the processing steps of the centering support 34. It can be understood that in order to ensure the deformation ability of the centering support 34, the elastic wall portion 343 has at least one bend.

[0157] It can be understood that in order to facilitate the lead routing connection of the voice coil 32 and smoothly connect and conduct with the external circuit, the inner fixing portion 342 is provided with an inner pad, and the lead of the voice coil 32 extends along the connecting portion 332 to the inner pad.

[0158] In one embodiment, if Figure 2 , Figure 3 and Figure 5 As shown, the outer fixing portion 341, the elastic wall portion 343 and the inner fixing portion 342 of the centering support 34 can be located in the same plane. Of course, in other embodiments, the outer fixing portion 341 and the inner fixing portion 342 of the centering support 34 can also be located in different planes. It can be understood that the centering support 34 is used to connect the external circuit to the voice coil 32, and the centering support 34 can also be used to effectively prevent the voice coil 32 from swinging or polarizing during vibration.

[0159] In one embodiment, the diaphragm 31 includes an inner ring portion 311, a first folded ring 313 arranged around the inner ring portion 311, a straight portion 314 arranged around the first folded ring 313, a second folded ring 315 arranged around the straight portion 314, and a fixed portion 316 connected to the outer side of the second folded ring 315, the fixed portion 316 is connected to the outer shell 1, the straight portion 314 is connected to the skeleton 33, the inner ring portion 311 is formed with an inner ring hole 312, the inner ring portion 311 is connected to the third magnetic group 223, and at least a portion of the third magnetic group 223 is protruded from the inner ring hole 312.

[0160] In this embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the inner ring portion 311 , the first fold ring 313 , the straight portion 314 , the second fold ring 315 and the fixing portion 316 of the diaphragm 31 may be an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 31 .

[0161] It can be understood that the first fold ring 313 and the second fold ring 315 of the diaphragm 31 are in an upwardly protruding convex structure or a downwardly concave structure, which is not limited here. Optionally, the protruding direction of the first fold ring 313 is opposite to the protruding direction of the second fold ring 315. In this embodiment, the first fold ring 313 protrudes in a direction away from the magnetic yoke 21, and the second fold ring 315 protrudes in a direction close to the magnetic yoke 21, that is, the protruding direction of the first fold ring 313 is upward, which can effectively avoid interference with the central magnetic part 22; the protruding direction of the second fold ring 315 is downward, so when the sound-emitting device 100 is applied to an electronic device, the height difference between the first fold ring 313 and the second fold ring 315 of the diaphragm 31 can be used to form a front sound cavity structure, so as to effectively reduce the height dimension of the electronic device in the Z direction.

[0162] In this embodiment, the protruding portion 2234 of the third magnetic group 223 is protruded from the inner ring hole 312 , that is, the inner ring portion 311 of the diaphragm 31 is connected to the edge portion 2233 of the third magnetic group 223 .

[0163] In one embodiment, if Figure 3 and Figure 4 As shown, the diaphragm 31 further includes a reinforcement portion 318, which is disposed between the straight portion 314 and the frame 33. It can be understood that by providing the reinforcement portion 318, the structural strength of the straight portion 314 of the diaphragm 31 can be effectively strengthened, thereby improving the connection stability of the voice coil 32, and preventing the diaphragm 31 from tearing when the voice coil 32 drives the diaphragm 31 to vibrate.

[0164] In one embodiment, if Figures 2 to 4 As shown, one end of the fixing portion 316 away from the second fold ring 315 is bent and extended toward the housing 1 to form a bent portion 317, and the bent portion 317 is connected to the outer wall of the housing 1. It can be understood that by bending downward on the outer side of the fixing portion 316 to form the bent portion 317, the bent portion 317 is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1, improving the connection stability and sealing performance.

[0165] The utility model also provides an electronic device, which includes the above-mentioned sound-generating device 100. The specific structure of the sound-generating device 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0166] In one embodiment, the electronic device further includes a device housing, the device housing has an installation space, and the sound-generating device 100 is disposed in the installation space of the device housing.

[0167] In this embodiment, the electronic device further includes a flexible circuit board, one end of which is electrically connected to the sound-generating device 100, and the other end of which is used to connect to an external power source. It can be understood that the flexible circuit board is used to connect the external circuit to the sound-generating device 100. The flexible circuit board is provided with an inner pad and an outer pad, the inner pad of the flexible circuit board is connected to the sound-generating device 100, and the outer pad of the flexible circuit board is used to connect to an external terminal.

[0168] In this embodiment, the device housing has an installation space, the sound device 100 is disposed in the installation space of the device housing, and at least one end of the flexible circuit board connected to the sound device 100 is located in the installation space of the device housing. Of course, in other embodiments, the flexible circuit board can also be entirely disposed in the installation space of the device housing, which is not limited here.

[0169] It is understandable that the electronic device can be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., which is not limited here. In the electronic device, the sound device 100 can be assembled into the housing of the electronic device in the form of a module, or it can be assembled into the housing of the electronic device in the form of a monomer. The electronic device can be a mobile phone, an MP3, an MP4, a tablet computer, a headset, a wearable device, etc., which are not listed one by one here.

[0170] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device (100), characterized in that: The sound-generating device (100) comprises: A magnetic circuit system (2), the magnetic circuit system (2) comprising a magnetic yoke (21), and a central magnetic portion (22) and a side magnetic portion (23) arranged on the magnetic yoke (21), the side magnetic portion (23) being located outside the central magnetic portion (22) and spaced apart from the central magnetic portion (22) to form a magnetic gap (24), the central magnetic portion (22) comprising a first magnetic group (221), a second magnetic group (222) and a third magnetic group (223) arranged in a stacked manner, the first magnetic group (221) being connected to the magnetic yoke (21); A vibration system (3), the vibration system (3) comprising a diaphragm (31) and a voice coil (32) connected to the diaphragm (31), the voice coil (32) being arranged corresponding to the magnetic gap (24); The first magnetic group (221) and the third magnetic group (223) are both magnetized along the vibration direction of the vibration system (3), and the magnetization direction of the second magnetic group (222) is arranged perpendicular to the magnetization directions of the first magnetic group (221) and the third magnetic group (223), so that the central magnetic part (22) forms a Halbach magnetic circuit.

2. The sound-generating device (100) according to claim 1, characterized in that: The magnetization direction of the first magnetic group (221) is opposite to the magnetization direction of the third magnetic group (223); The second magnetic group (222) is magnetized along a vibration direction perpendicular to the vibration system (3), and the magnetization direction of the second magnetic group (222) is along the periphery of the second magnetic group (222) toward the center of the second magnetic group (222); or, the second magnetic group (222) has a first axis and a second axis perpendicular to the vibration direction of the vibration system (3), and the first axis and the second axis are perpendicular to each other, and the magnetization direction of the second magnetic group (222) is along the first axis and / or the second axis; The magnetic pole on the inner side of the second magnetic group (222) close to the center thereof is the same as the magnetic pole on the side of the first magnetic group (221) away from the second magnetic group (222).

3. The sound-generating device (100) according to claim 2, characterized in that: The second magnetic group (222) comprises a second magnet (2221) of an integral plate-shaped structure, and a through hole is provided at the center of the second magnet (2221) of the plate-shaped structure.

4. The sound-generating device (100) according to claim 1, characterized in that: The edge magnetic part (23) comprises a stacked edge magnet (231) and an edge magnetic conductive plate (232), and the edge magnet (231) is connected to the magnetic conductive yoke (21); The first magnetic group (221), the third magnetic group (223) and the side magnet (231) are all magnetized along the vibration direction of the vibration system (3); the magnetization direction of the first magnetic group (221) is opposite to the magnetization direction of the side magnet (231) of the side magnet portion (23); and the magnetization direction of the third magnetic group (223) is the same as the magnetization direction of the side magnet (231) of the side magnet portion (23).

5. The sound-generating device (100) according to claim 1, characterized in that: The projection of at least part of the second magnetic group (222) along the vibration direction perpendicular to the vibration system (3) coincides with the projection of the voice coil (32) along the vibration direction perpendicular to the vibration system (3).

6. The sound-generating device (100) according to claim 1, characterized in that: The first magnetic group (221) includes a first magnet (2211) with an integral plate-shaped structure; Alternatively, the first magnetic group (221) comprises a plurality of first magnets (2211), the plurality of first magnets (2211) are arranged adjacent to each other and are located between the second magnetic group (222) and the magnetic yoke (21); wherein the plurality of first magnets (2211) are all magnetized along the vibration direction of the vibration system (3), and the magnetization directions of the plurality of first magnets (2211) are the same.

7. The sound-generating device (100) according to claim 1, characterized in that: The voice coil (32) is in a rectangular ring shape, and has a long side (321) and a short side (322) connected end to end; The second magnetic group (222) comprises two second magnets (2221), the two second magnets (2221) are adjacent to each other and arranged in parallel along the direction of the long side (321), the two second magnets (2221) are magnetized along the direction of the long side (321), and the magnetization directions of the two second magnets (2221) are opposite; Or, the second magnetic group (222) comprises two second magnets (2221), the two second magnets (2221) are adjacent to each other and arranged in parallel along the direction of the short side (322), the two second magnets (2221) are magnetized along the direction of the short side (322), and the magnetization directions of the two second magnets (2221) are opposite; Or, the second magnetic group (222) comprises two second magnets (2221) and two third magnets (2222), the two second magnets (2221) are adjacent to and arranged in parallel along the direction of the short side (322), the two third magnets (2222) are arranged at both ends of the two second magnets (2221) along the direction of the long side (321), the two second magnets (2221) and the two third magnets (2222) are magnetized along the direction of the short side (322) and the direction of the long side (321), respectively, the magnetization directions of the two second magnets (2221) are opposite, and the magnetization directions of the two third magnets (2222) are opposite; Alternatively, the second magnetic group (222) is divided along two diagonal lines to form two second magnets (2221) and two third magnets (2222); the two second magnets (2221) are arranged in parallel along the direction of the short side (322); the two third magnets (2222) are arranged in parallel along the direction of the long side (321); the two second magnets (2221) and the two third magnets (2222) are magnetized along the direction of the short side (322) and the direction of the long side (321), respectively; the magnetization directions of the two second magnets (2221) are opposite, and the magnetization directions of the two third magnets (2222) are opposite.

8. The sound-generating device (100) according to claim 1, characterized in that: The third magnetic group (223) comprises a plurality of fourth magnets (2231), wherein the plurality of fourth magnets (2231) are arranged adjacent to each other and are located on a side of the second magnetic group (222) facing away from the first magnetic group (221); Wherein, the plurality of fourth magnets (2231) are all magnetized along the vibration direction of the vibration system (3), and the magnetization directions of the plurality of fourth magnets (2231) are the same.

9. The sound-generating device (100) according to claim 1, characterized in that: At least a portion of the side of the third magnetic group (223) facing away from the second magnetic group (222) protrudes toward a side facing away from the second magnetic group (222) to form a protrusion (2234).

10. The sound-generating device (100) according to claim 9, characterized in that: The third magnetic group (223) comprises a central portion (2232) and an edge portion (2233), wherein the edge portion (2233) is arranged around the outer periphery of the central portion (2232), and a side of the central portion (2232) facing away from the second magnetic group (222) protrudes from a side of the edge portion (2233) facing away from the second magnetic group (222) to form the protruding portion (2234); The edge portion (2233) forms a closed integral annular structure; or, the edge portion (2233) includes a plurality of adjacent edge portions (2233) connected end to end to form a closed annular structure; or, the edge portion (2233) includes a plurality of adjacent edge portions (2233) spaced apart to form an annular structure with a gap; or, the edge portion (2233) and the center portion (2232) are an integrally formed structure.

11. The sound generating device (100) according to any one of claims 1 to 10, characterized in that: The sound-generating device (100) further comprises a housing (1); the edge magnetic portion (23) comprises a stacked edge magnet (231) and an edge magnetic conductive plate (232); the edge magnet (231) is connected to the magnetic conductive yoke (21); one end of the housing (1) is connected to the edge magnetic conductive plate (232); and the other end of the housing (1) is connected to the periphery of the diaphragm (31).

12. The sound-generating device (100) according to claim 11, characterized in that: The side magnetic conductive plate (232) and the housing (1) are an integrally formed structure; And / or, the diaphragm (31) is annular, the inner periphery of the diaphragm (31) is fixed to the magnetic circuit system (2), one end of the voice coil (32) is connected to the diaphragm (31), and the other end of the voice coil (32) is suspended in the magnetic gap (24).

13. The sound-generating device (100) according to claim 11, characterized in that: The vibration system (3) also includes a skeleton (33), and the voice coil (32) is connected to the diaphragm (31) via the skeleton (33).

14. The sound-generating device (100) according to claim 13, characterized in that: The skeleton (33) comprises a main body (331) and a connecting portion (332) connected to the periphery of the main body (331); the main body (331) is arranged between the diaphragm (31) and the voice coil (32); The vibration system (3) also includes a centering support plate (34), the centering support plate (34) including an external fixing portion (341), an internal fixing portion (342), and an elastic wall portion (343) connecting the external fixing portion (341) and the internal fixing portion (342), the external fixing portion (341) being connected to the housing (1) and / or the edge magnetic portion (23), and the internal fixing portion (342) being connected to the connecting portion (332).

15. The sound-generating device (100) according to claim 13, characterized in that: The diaphragm (31) comprises an inner ring portion (311), a first folded ring (313) arranged around the inner ring portion (311), a straight portion (314) arranged around the first folded ring (313), a second folded ring (315) arranged around the straight portion (314), and a fixed portion (316) connected to the outer side of the second folded ring (315), wherein the fixed portion (316) is connected to the outer shell (1), the straight portion (314) is connected to the skeleton (33), the inner ring portion (311) is formed with an inner ring hole (312), the inner ring portion (311) is connected to the third magnetic group (223), and at least a portion of the third magnetic group (223) is protruding from the inner ring hole (312).

16. The sound-generating device (100) according to claim 15, characterized in that: The inner ring portion (311), the first folded ring (313), the straight portion (314), the second folded ring (315) and the fixing portion (316) are an integrally formed structure; And / or, the first fold ring (313) protrudes in a direction away from the magnetic yoke (21), and the second fold ring (315) protrudes in a direction close to the magnetic yoke (21); And / or, the diaphragm (31) further includes a reinforcement portion (318), wherein the reinforcement portion (318) is disposed between the straight portion (314) and the frame (33); And / or, one end of the fixing portion (316) away from the second fold ring (315) is bent and extended toward the outer shell (1) to form a bent portion (317), and the bent portion (317) is connected to the outer wall of the outer shell (1).

17. An electronic device, characterized in that: The electronic device comprises the sound emitting device (100) according to any one of claims 1 to 16.

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