Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and electronic equipment, relates to electroacoustic transduction technology field, the sounding device comprises a vibration system and a magnetic circuit system, the vibration system comprises a diaphragm and a voice coil, the magnetic circuit system comprises a magnetic conductive yoke, and a central magnetic part and an edge magnetic part arranged on the magnetic conductive yoke, the edge magnetic part is arranged outside the central magnetic part, and the magnetic circuit system is arranged on the magnetic conductive yoke. The voice coil is arranged in the central magnetic part and is spaced from the central magnetic part to form a magnetic gap, the voice coil and the magnetic gap are correspondingly arranged, the central magnetic part comprises a middle magnetic assembly and a Halbach magnetic circuit, the Halbach magnetic circuit is arranged on at least one side of the middle magnetic assembly in the vibration direction perpendicular to the vibration system, and the middle magnetic assembly comprises a first central magnet and a central magnetic conductive plate which are arranged in a stacked mode; the first center magnet is connected to the magnetic conductive yoke. According to the sounding device, 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 the performance of the whole machine are better 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 vibration system, the vibration system comprising a diaphragm and a voice coil connected to the diaphragm;

[0007] A magnetic circuit system, the magnetic circuit system includes a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the side magnetic portion is located on the outside of the central magnetic portion and is spaced from the central magnetic portion to form a magnetic gap, the voice coil is arranged corresponding to the magnetic gap, the central magnetic portion includes an intermediate magnetic component and a Halbach magnetic circuit, the Halbach magnetic circuit is arranged on at least one side of the intermediate magnetic component perpendicular to the vibration direction of the vibration system, the intermediate magnetic component includes a first central magnet and a central magnetic plate arranged in a stacked manner, and the first central magnet is connected to the magnetic yoke.

[0008] In one embodiment, the intermediate magnetic assembly also includes a second central magnet, which is arranged on the side of the central magnetic conductive plate facing away from the first central magnet; the first central magnet and the second central magnet are both magnetized along the vibration direction of the vibration system, and the magnetization direction of the first central magnet is opposite to the magnetization direction of the second central magnet.

[0009] In one embodiment, the intermediate magnetic assembly further includes a third central magnet; the third central magnet is disposed between the first central magnet and the central magnetic conductive plate; and / or the third central magnet is disposed between the second central magnet and the central magnetic conductive plate; wherein the magnetization direction of the third central magnet is perpendicular to the magnetization directions of the first central magnet and the second central magnet;

[0010] And / or, the central magnetic conductive plates include a plurality of plates, the plurality of central magnetic conductive plates are arranged adjacent to and side by side, and are located between the first central magnet and the second central magnet.

[0011] 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;

[0012] The first center magnet, the second center magnet and the side magnets are all magnetized along the vibration direction of the vibration system. The magnetization direction of the first center magnet is opposite to the magnetization direction of the side magnets of the side magnet part, and the magnetization direction of the second center magnet is the same as the magnetization direction of the side magnets of the side magnet part.

[0013] In one embodiment, the Halbach magnetic circuit includes a first magnet, a second magnet, and a third magnet which are stacked, and the first magnet is connected to the magnetic yoke;

[0014] The first magnet and the third magnet are both magnetized along the vibration direction of the vibration system, and the magnetization direction of the second magnet is perpendicular to the magnetization directions of the first magnet and the third magnet.

[0015] In one embodiment, the magnetization direction of the first magnet is opposite to the magnetization direction of the third magnet;

[0016] And / or, the magnetization direction of the first magnet is the same as the magnetization direction of the first central magnet, and the magnetization direction of the third magnet is the same as the magnetization direction of the second central magnet;

[0017] And / or, the polarity of the end of the second magnet away from the intermediate magnetic assembly is the same as the polarity of the ends of the first magnet and the third magnet close to the second magnet;

[0018] And / or, the second magnet includes a plurality of second magnets, and the plurality of second magnets are arranged adjacent to and side by side and are located between the first magnet and the third magnet.

[0019] In one embodiment, the first magnet and the first central magnet are an integrally formed structure;

[0020] And / or, the thickness of the first magnet along the vertical direction is equal to the thickness of the first central magnet along the vertical direction;

[0021] And / or, the third magnet and the second central magnet are an integrally formed structure;

[0022] And / or, the thickness of the third magnet along the vertical direction is less than or equal to the thickness of the second central magnet along the vertical direction;

[0023] And / or, the thickness of the second magnet along the vertical direction is greater than or equal to the thickness of the central magnetic conductive plate along the vertical direction.

[0024] In one embodiment, a projection of at least part of the second magnet 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;

[0025] And / or, at least a portion of the projection of the central magnetic conductive plate along the vibration direction perpendicular to the vibration system coincides with the projection of the second magnet along the vibration direction perpendicular to the vibration system.

[0026] In one embodiment, the Halbach magnetic circuit is disposed around the outer periphery of the intermediate magnetic component;

[0027] The second magnet forms a closed integral ring structure; or, the second magnet includes a plurality of second magnets, and adjacent second magnets are connected end to end to form a closed ring structure; or, the second magnet includes a plurality of second magnets, and the plurality of second magnets are arranged around the outer circumference of the intermediate magnetic component, and there are gaps between adjacent second magnets.

[0028] In one embodiment, the Halbach magnetic circuit further includes a first magnetic conductive plate;

[0029] The first magnetic conductive plate is arranged between the first magnet and the second magnet; and / or, the first magnetic conductive plate is arranged between the third magnet and the second magnet; and / or, the first magnetic conductive plate is adjacent to and arranged side by side with the second magnet, and is located between the first magnet and the third magnet.

[0030] In one embodiment, the first magnetic conductive plate and the second magnet are adjacent to each other and arranged alternately, and are located between the first magnet and the third magnet;

[0031] And / or, the first magnetic conductive plate and the central magnetic conductive plate are an integrally formed structure;

[0032] And / or, the intermediate magnetic assembly also includes a third center magnet; the third center magnet is arranged between the central magnetic conductive plate and the first center magnet and / or the second center magnet, the magnetization direction of the third center magnet is perpendicular to the magnetization direction of the first center magnet and the second center magnet, and the third center magnet and the second magnet are an integrally formed structure.

[0033] In one embodiment, the intermediate magnetic assembly is arranged in a square shape, and the intermediate magnetic assembly has a short axis side and a long axis side connected end to end;

[0034] The two short-axis sides of the intermediate magnetic component are respectively provided with the Halbach magnetic circuit; and / or, the two long-axis sides of the intermediate magnetic component are respectively provided with the Halbach magnetic circuit.

[0035] 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.

[0036] In one embodiment, the side magnetic conductive plate and the housing are an integrally formed structure;

[0037] 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.

[0038] In one embodiment, the vibration system further includes a frame, and the voice coil is connected to the diaphragm through the frame.

[0039] 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;

[0040] 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.

[0041] 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 frame, the inner ring portion is formed with an inner ring hole, the inner ring portion is connected to the central magnetic portion, and at least a portion of the intermediate magnetic component is protruded from the inner ring hole.

[0042] 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;

[0043] 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;

[0044] And / or, the diaphragm further comprises a reinforcement portion, wherein the reinforcement portion is disposed between the straight portion and the frame;

[0045] 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.

[0046] The utility model also provides an electronic device, which includes the sound-generating device mentioned above.

[0047] The sound-generating device of the technical solution of the utility model is provided with a 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 outside 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, the intermediate magnetic component of the central magnetic part is provided as a first central magnet and a central magnetic plate stacked on the magnetic yoke, and a Halbach magnetic circuit is provided on at least one side of the intermediate magnetic component perpendicular to the vibration direction of the vibration system, so that the Halbach magnetic circuit and the intermediate magnetic component cooperate with each other, so that the magnetic field passes through the magnetic gap after superposition, thereby increasing the density of the magnetic flux of the magnetic gap, increasing the number of magnetic lines of force passing through the voice coil, increasing the magnetic field force on the voice coil, effectively improving the BL value, improving the sensitivity of the sound-generating device, effectively improving the flatness of the BL curve, significantly improving the FR frequency response curve and effectively reducing the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] 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.

[0049] Figure 1 A structural schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0050] Figure 2A structural schematic diagram of another perspective of an embodiment of a sound-generating device provided by the utility model;

[0051] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0052] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0053] Figure 5 A partial structural schematic diagram of an embodiment of a sound-generating device provided by the utility model;

[0054] Figure 6 This is an exploded schematic diagram of an embodiment of the central magnetic part provided by the utility model;

[0055] Figure 7 A cross-sectional schematic diagram of an embodiment of a central magnetic part provided by the utility model;

[0056] Figure 8 A cross-sectional schematic diagram of another embodiment of the central magnetic part provided by the utility model;

[0057] Fig. 9 A cross-sectional schematic diagram of another embodiment of the central magnetic part provided by the utility model;

[0058] Fig.10 A schematic diagram of the structure of the arrangement of the central magnetic conductive plate and the second magnet according to an embodiment of the present invention;

[0059] Fig.11 A structural schematic diagram of another embodiment of the arrangement of the central magnetic conductive plate and the second magnet provided by the utility model;

[0060] Fig.12 A structural schematic diagram of another embodiment of the arrangement of the central magnetic conductive plate and the second magnet provided by the utility model;

[0061] Fig.13 A structural schematic diagram of another embodiment of the arrangement of the central magnetic conductive plate and the second magnet provided by the utility model;

[0062] Fig.14 A comparison chart of the BL curves of the sound-generating device provided by the utility model and the prior art;

[0063] Fig.15 This is a comparison chart of the FR curves of the sound-generating device provided by the utility model and the prior art.

[0064] Description of Figure Numbers:

[0065] 100. Sounding device; 1. Shell; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Center magnetic part; 221. Intermediate magnetic assembly; 2211. First center magnet; 2212. Center magnetic plate; 2213. Second center magnet; 2214. Third center magnet; 222. Halbach magnetic circuit; 2221. First magnet; 2222. Second magnet; 2223. Third magnet; 2224. First magnetic plate; 23. Side magnetic part; 231. Side magnetic Iron; 232, edge magnetic plate; 24, magnetic gap; 3, vibration system; 31, diaphragm; 311, inner ring; 312, inner ring hole; 313, first fold ring; 314, straight portion; 315, second fold ring; 316, fixed portion; 317, bent portion; 318, reinforcement portion; 32, voice coil; 33, skeleton; 331, main body; 332, connecting portion; 34, centering support plate; 341, external fixing portion; 342, internal fixing portion; 343, elastic wall portion.

[0066] 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

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Please refer to Figures 1 to 13 As shown, in an embodiment of the utility model, the sound-generating device 100 includes a vibration system 3 and a magnetic circuit system 2, wherein the vibration system 3 includes a diaphragm 31 and a voice coil 32 connected to the diaphragm 31, 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 voice coil 32 is arranged corresponding to the magnetic gap 24, the central magnetic portion 22 includes an intermediate magnetic component 221 and a Halbach magnetic circuit 222, the Halbach magnetic circuit 222 is arranged on at least one side of the intermediate magnetic component 221 perpendicular to the vibration direction of the vibration system 3, the intermediate magnetic component 221 includes a first central magnet 2211 and a central magnetic plate 2212 arranged in a stacked manner, and the first central magnet 2211 is connected to the magnetic yoke 21.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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 .

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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 also 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 and / or the edge magnetic part 23 .

[0085] 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.

[0086] In this embodiment, the central magnetic portion 22 is set as an intermediate magnetic component 221 and a Halbach magnetic circuit 222, that is, the Halbach magnetic circuit 222 is set on at least one side of the intermediate magnetic component 221 along a vibration direction perpendicular to the vibration system 3, and the intermediate magnetic component 221 is set as a first central magnet 2211 and a central magnetic plate 2212 stacked on the magnetic yoke 21. In this way, the magnetic field formed by the Halbach magnetic circuit 222 and the magnetic field formed by the intermediate magnetic component 221 are superimposed and pass through the magnetic gap 24 to form 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.14 As shown), the FR frequency response curve is significantly improved (as shown Fig.15 As shown in the figure, the harmonic distortion THD is effectively reduced, which improves the sound effect and performance of the whole machine.

[0087] It should be noted that Fig.14 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.15 This 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 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.

[0088] Optionally, the vibration system 3 in this embodiment vibrates in the vertical direction, that is, the Halbach magnetic circuit 222 is arranged on at least one side of the intermediate magnetic component 221 in the horizontal direction. Of course, the Halbach magnetic circuit 222 is arranged on multiple sides of the intermediate magnetic component 221 in the horizontal direction or surrounds the periphery of the intermediate magnetic component 221 in the horizontal direction.

[0089] It should be noted that Figure 4 and Figure 5 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.

[0090] It can be understood that the Halbach magnetic circuit 222 can form 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 the voice coil 32 has a strong magnetic field, 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.

[0091] It can be understood that the first center magnet 2211 and the center magnetic plate 2212 of the intermediate magnetic assembly 221 are stacked along the moving direction of the voice coil 32, that is, the first center magnet 2211 is connected to the magnetic yoke 21, and the center magnetic plate 2212 is stacked on the side of the first center magnet 2211 facing away from the magnetic yoke 21. In this embodiment, the first center magnet 2211 and the center magnetic plate 2212 of the intermediate magnetic assembly 221 can optionally be a square plate structure, which is not limited here. Optionally, the first center magnet 2211 and the center magnetic plate 2212 of the intermediate magnetic assembly 221 are stacked in the vertical direction.

[0092] In one embodiment, the intermediate magnetic assembly 221 further includes a second central magnet 2213 . The second central magnet 2213 is disposed on a side of the central magnetic conductive plate 2212 facing away from the first central magnet 2211 .

[0093] In this embodiment, the first center magnet 2211, the center magnetic conductive plate 2212 and the second center magnet 2213 of the intermediate magnetic component 221 are stacked along the moving direction of the voice coil 32, that is, the first center magnet 2211, the center magnetic conductive plate 2212 and the second center magnet 2213 of the intermediate magnetic component 221 are stacked along the vertical direction.

[0094] It can be understood that the first central magnet 2211 is connected to the magnetic yoke 21, the central magnetic plate 2212 is stacked on the side of the first central magnet 2211 facing away from the magnetic yoke 21, and the second central magnet 2213 is stacked on the side of the central magnetic plate 2212 facing away from the first central magnet 2211. In this embodiment, the first central magnet 2211, the central magnetic plate 2212 and the second central magnet 2213 of the intermediate magnetic assembly 221 can optionally be in a square plate-like structure, which is not limited here.

[0095] In one embodiment, if Fig.10 , Fig.12 and Fig.13As shown, the central magnetic conductive plates 2212 include a plurality of central magnetic conductive plates 2212 , which are adjacent to and arranged side by side and are located on a side of the first central magnet 2211 facing away from the magnetic conductive yoke 21 .

[0096] Optionally, the central magnetic conductive plates 2212 include a plurality of central magnetic conductive plates 2212 , which are adjacently and side by side arranged and located between the first central magnet 2211 and the second central magnet 2213 .

[0097] It can be understood that the central magnetic conductive plate 2212 of the intermediate magnetic component 221 can be an integral square plate-like structure and be located between the first central magnet 2211 and the second central magnet 2213; or, the central magnetic conductive plate 2212 includes multiple central magnetic conductive plates 2212, which are adjacent to and arranged in parallel between the first central magnet 2211 and the second central magnet 2213, so that the multiple central magnetic conductive plates 2212 cooperate to form a square plate-like structure, which is not limited here.

[0098] It should be noted that the first center magnet 2211 of the intermediate magnetic component 221 can be an integral square plate-like structure; or, the first center magnet 2211 includes multiple first center magnets 2211, which are adjacent and arranged in parallel between the magnetic yoke 21 and the central magnetic plate 2212, so that the multiple first center magnets 2211 cooperate to form a square plate-like structure, which is not limited here. The second center magnet 2213 of the intermediate magnetic component 221 can be an integral square plate-like structure; or, the second center magnet 2213 includes multiple second center magnets 2213, which are adjacent and arranged in parallel on the side of the central magnetic plate 2212 facing away from the first center magnet 2211, so that the multiple second center magnets 2213 cooperate to form a square plate-like structure, which is not limited here.

[0099] The sound-generating device 100 of the utility model is provided by configuring the magnetic circuit system 2 to be 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 when current is passed through the voice coil 32, the voice coil 32 vibrates in the magnetic field formed by the magnetic circuit system 2 and drives the diaphragm 31 to vibrate and generate sound; at the same time, by configuring the intermediate magnetic component 221 of the central magnetic portion 22 to be a first central magnet 2211, a central magnetic plate 2212 and a first magnetic plate 2213 provided on the magnetic yoke 21 in a stacked manner, Two central magnets 2213 are provided, and a Halbach magnetic circuit 222 is provided on at least one side of the intermediate magnetic component 221 perpendicular to the vibration direction of the vibration system 3. In this way, the Halbach magnetic circuit 222 and the intermediate magnetic component 221 cooperate with each other, so that the magnetic field passes through the magnetic gap 24 after being superimposed, thereby increasing the density of the magnetic flux in 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, improving the sensitivity of the sound-generating device 100, effectively improving the flatness of the BL curve, significantly improving the FR frequency response curve, and effectively reducing the harmonic distortion THD, so that the sound effect and performance of the whole machine are better improved.

[0100] In one embodiment, the first central magnet 2211 and the second central magnet 2213 are both magnetized along the vibration direction of the vibration system 3 , and the magnetization direction of the first central magnet 2211 is opposite to the magnetization direction of the second central magnet 2213 .

[0101] Optionally, the magnetic pole of the first central magnet 2211 close to the central magnetic conductive plate 2212 is the same as the magnetic pole of the second central magnet 2213 close to the central magnetic conductive plate 2212 .

[0102] In this embodiment, if Figure 4 As shown, by magnetizing the first center magnet 2211 and the second center magnet 2213 located on both sides of the center magnetic conductive plate 2212 in the intermediate magnetic assembly 221 along the direction of movement of the voice coil 32, the magnetizing direction of the first center magnet 2211 is opposite to the magnetizing direction of the second center magnet 2213, so that the magnetic flux lines of the first center magnet 2211 and the second center magnet 2213 are gathered on the center magnetic conductive plate 2212, thereby passing through the magnetic gap 24 to generate a magnetic field with a stronger magnetic field strength.

[0103] In this embodiment, the vibration system 3 vibrates in the vertical direction, that is, the voice coil 32 moves in the vertical direction. Optionally, the first center magnet 2211 and the second center magnet 2213 are magnetized in the vertical direction, and the magnetization direction of the first center magnet 2211 is opposite to the magnetization direction of the second center magnet 2213.

[0104] It can be understood that the magnetization direction of the first central magnet 2211 is opposite to that of the second central magnet 2213, that is, the N pole of the first central magnet 2211 is at the top and the S pole is at the bottom, and the N pole of the second central magnet 2213 is at the bottom and the S pole is at the top, and vice versa.

[0105] In this embodiment, when the first central magnet 2211 is magnetized from bottom to top, the second central magnet 2213 is magnetized from top to bottom; or, when the first central magnet 2211 is magnetized from top to bottom, the second central magnet 2213 is magnetized from bottom to top, which is not limited here.

[0106] In one embodiment, the edge magnet portion 23 includes a stacked edge magnet 231 and a edge magnetic plate 232, and the edge magnet 231 is connected to the magnetic yoke 21; the first center magnet 2211, the second center magnet 2213 and the edge magnet 231 are all magnetized along the vibration direction of the vibration system 3, the magnetization direction of the first center magnet 2211 is opposite to the magnetization direction of the edge magnet 231 of the edge magnet portion 23, and the magnetization direction of the second center magnet 2213 is the same as the magnetization direction of the edge magnet 231 of the edge magnet portion 23.

[0107] 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 center magnet 2211 close to the center magnetic conductive plate 2212, 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 second center magnet 2213 close to the center magnetic conductive plate 2212.

[0108] In this embodiment, if Figures 2 to 5 As 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.

[0109] 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.

[0110] 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, the edge magnets 231 and the edge magnetic conductive plates 232 are both multiple and arranged one by one, and the adjacent edge magnets 231 are connected end to end to form a closed annular structure. Alternatively, the edge magnets 231 form a closed integral annular structure, the edge magnetic conductive plates 232 are multiple, the adjacent edge magnetic conductive plates 232 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnets 231; or, the edge magnetic conductive plates 232 form a closed integral annular structure, the edge magnets 231 are multiple, the adjacent edge magnets 231 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnetic conductive plates 232; or multiple edge magnetic parts 23 surround the outside of the central magnetic part 22, and multiple edge magnetic parts 23 are spaced apart, which is not limited here.

[0111] 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.

[0112] In this embodiment, the side magnets 231 of the side magnet portion 23 and the first center magnet 2211 and the second center magnet 2213 of the middle magnet assembly 221 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 center magnet 2211 is opposite to the magnetization direction of the side magnets 231 of the side magnet portion 23, and the magnetization direction of the second center magnet 2213 is the same as the magnetization direction of the side magnets 231 of the side magnet portion 23.

[0113] It can be understood that when the first center magnet 2211 is magnetized from bottom to top, the second center magnet 2213 and the side magnet 231 are magnetized from top to bottom; or, when the first center magnet 2211 is magnetized from top to bottom, the second center magnet 2213 and the side magnet 231 are magnetized from bottom to top, which is not limited here. That is, when the N pole of the first center magnet 2211 is at the top and the S pole is at the bottom, the N pole of the second center magnet 2213 and the side magnet 231 is at the bottom and the S pole is at the top; or, when the N pole of the first center magnet 2211 is at the bottom and the S pole is at the top, the N pole of the second center magnet 2213 and the side magnet 231 is at the top and the S pole is at the bottom, which is not limited here.

[0114] In one embodiment, the intermediate magnetic assembly 221 also includes a third central magnet 2214; the third central magnet 2214 is disposed between the first central magnet 2211 and the central magnetic conductive plate 2212; and / or the third central magnet 2214 is disposed between the second central magnet 2213 and the central magnetic conductive plate 2212; wherein the magnetization direction of the third central magnet 2214 is perpendicular to the magnetization direction of the first central magnet 2211 and the second central magnet 2213.

[0115] In this embodiment, if Figures 7 to 9 As shown, by arranging the third center magnet 2214 between the center magnetic conductive plate 2212 and the first center magnet 2211 and / or the second center magnet 2213, the magnetization direction of the third center magnet 2214 is perpendicular to the magnetization directions of the first center magnet 2211 and the second center magnet 2213, so that the intermediate magnetic assembly 221 forms a Halbach magnetic array to generate a stronger magnetic field, 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, improving the sensitivity of the sound generating device 100, and effectively improving the flatness of the BL curve (such as Fig.14 As shown), the FR frequency response curve is significantly improved (as shown Fig.15 As shown in the figure, the harmonic distortion THD is effectively reduced, which improves the sound effect and performance of the whole machine.

[0116] It can be understood that the third center magnet 2214 can be set between the first center magnet 2211 and the center magnetic conductive plate 2212; or, the third center magnet 2214 can be set between the second center magnet 2213 and the center magnetic conductive plate 2212; or, the third center magnet 2214 can be set between the first center magnet 2211 and the center magnetic conductive plate 2212, and the third center magnet 2214 can be set between the second center magnet 2213 and the center magnetic conductive plate 2212 at the same time, and no limitation is made here.

[0117] It should be noted that the third center magnet 2214 can be an integral square plate-like structure, arranged between the central magnetic conductive plate 2212 and the first center magnet 2211 and / or the second center magnet 2213; or, the third center magnet 2214 includes multiple third center magnets 2214, and the multiple third center magnets 2214 are adjacently and parallelly arranged between the central magnetic conductive plate 2212 and the first center magnet 2211 and / or the second center magnet 2213, so that the multiple third center magnets 2214 cooperate to form a square plate-like structure, which is not limited here.

[0118] In one embodiment, the Halbach magnetic circuit 222 includes a first magnet 2221, a second magnet 2222 and a third magnet 2223 which are stacked, and the first magnet 2221 is connected to the magnetic yoke 21; the first magnet 2221 and the third magnet 2223 are magnetized along the vibration direction of the vibration system 3, and the magnetization direction of the second magnet 2222 is perpendicular to the magnetization direction of the first magnet 2221 and the third magnet 2223.

[0119] In this embodiment, if Figures 3 to 13 As shown, by setting the Halbach magnetic circuit 222 as the first magnet 2221, the second magnet 2222 and the third magnet 2223 stacked on the magnetic yoke 21, the magnetization direction of the second magnet 2222 is perpendicular to the magnetization directions of the first magnet 2221 and the third magnet 2223, so that the first magnet 2221, the second magnet 2222 and the third magnet 2223 of the Halbach magnetic circuit 222 form a Halbach magnetic array, forming a magnetic field with a higher magnetic field strength, so that the Halbach magnetic circuit 222 has a magnetic field enhancement side facing the magnetic gap 24 and a magnetic field weakening side away from the magnetic gap 24, so that it is superimposed with the magnetic field formed by the intermediate magnetic component 221, and the magnetic field strength is further enhanced, 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, improving the sensitivity of the sound-generating device 100, and improving the sound effect and performance of the whole machine.

[0120] It can be understood that the first magnet 2221 and the third magnet 2223 are magnetized along the vibration direction of the vibration system 3, that is, they are magnetized along the moving direction of the voice coil 32. Optionally, the first magnet 2221 and the third magnet 2223 are magnetized along the vertical direction. In this embodiment, the magnetization direction of the second magnet 2222 is perpendicular to the magnetization direction of the first magnet 2221 and the third magnet 2223. Optionally, the first magnet 2221 and the third magnet 2223 of the Halbach magnetic circuit 222 are magnetized along the vertical direction, the second magnet 2222 is magnetized along the horizontal direction, and the first center magnet 2211 and the second center magnet 2213 of the intermediate magnetic component 221 are magnetized along the vertical direction, so as to effectively superimpose and form a magnetic field with a higher magnetic field strength.

[0121] Optionally, the magnetization direction of the first magnet 2221 is opposite to the magnetization direction of the third magnet 2223. In this embodiment, the magnetic pole of the first magnet 2221 close to the second magnet 2222 is the same as the magnetic pole of the third magnet 2223 close to the second magnet 2222.

[0122] In this embodiment, when the first magnet 2221 is magnetized from bottom to top, the third magnet 2223 is magnetized from top to bottom; or, when the first magnet 2221 is magnetized from top to bottom, the third magnet 2223 is magnetized from bottom to top, which is not limited here. That is, when the N pole of the first magnet 2221 is at the top and the S pole is at the bottom, the N pole of the third magnet 2223 is at the bottom and the S pole is at the top; or, when the N pole of the first magnet 2221 is at the bottom and the S pole is at the top, the N pole of the third magnet 2223 is at the top and the S pole is at the bottom, which is not limited here.

[0123] In this embodiment, the magnetization direction of the first magnet 2221 is the same as that of the first center magnet 2211, and the magnetization direction of the third magnet 2223 is the same as that of the second center magnet 2213, so that the magnetic flux lines of the first center magnet 2211 and the second center magnet 2213 of the intermediate magnetic component 221 are gathered on the central magnetic conductive plate 2212, and the magnetic flux lines of the first magnet 2221 and the third magnet 2223 of the Halbach magnetic circuit 222 are gathered on the second magnet 2222, so that the magnetic field with a relatively strong magnetic field strength generated by the intermediate magnetic component 221 is superimposed on the magnetic field with a relatively strong magnetic field strength generated by the Halbach magnetic circuit 222 and 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, increasing the magnetic field force on the voice coil 32, and effectively improving the BL value.

[0124] It can be understood that when the second magnet 2222 is magnetized in the horizontal direction, the polarity of the end of the second magnet 2222 away from the intermediate magnetic component 221 is the same as the polarity of the end of the first magnet 2221 and the third magnet 2223 close to the second magnet 2222. The magnetization direction of the second magnet 2222 can be from the voice coil 32 to the center magnetic conductive plate 2212, that is, the S pole of the second magnet 2222 faces the voice coil 32, and the N pole faces the center magnetic conductive plate 2212; or, the magnetization direction of the second magnet 2222 can be from the center magnetic conductive plate 2212 to the voice coil 32, that is, the S pole of the second magnet 2222 faces the center magnetic conductive plate 2212, and the N pole faces the voice coil 32, which is not limited here.

[0125] In this embodiment, the magnetization direction of the second magnet 2222 is from the direction of the central magnetic plate 2212 to the voice coil 32. At this time, the first magnet 2221 of the Halbach magnetic circuit 222 is magnetized from bottom to top, the third magnet 2223 is magnetized from top to bottom, the first center magnet 2211 of the intermediate magnetic assembly 221 is magnetized from bottom to top, and the second center magnet 2213 is magnetized from top to bottom. When the magnetization direction of the second magnet 2222 is from the direction of the voice coil 32 to the central magnetic plate 2212, at this time, the first magnet 2221 of the Halbach magnetic circuit 222 is magnetized from top to bottom, the third magnet 2223 is magnetized from bottom to top, the first center magnet 2211 of the intermediate magnetic assembly 221 is magnetized from top to bottom, and the second center magnet 2213 is magnetized from bottom to top, which is not limited here.

[0126] In one embodiment, if Fig.10 , Fig.11 As shown, the second magnet 2222 includes a plurality of second magnets 2222 , which are adjacent to and arranged side by side and are located between the first magnet 2221 and the third magnet 2223 .

[0127] It can be understood that the second magnet 2222 of the Halbach magnetic circuit 222 can be an integral square bar or plate structure; or, the second magnet 2222 includes a plurality of second magnets 2222, and the plurality of second magnets 2222 are adjacently and parallelly arranged between the first magnet 2221 and the third magnet 2223, so that the plurality of second magnets 2222 cooperate to form a square bar or plate structure, which is not limited here.

[0128] It should be noted that the first magnet 2221 of the Halbach magnetic circuit 222 can be an integral square bar or plate structure; or, the first magnet 2221 includes multiple first magnets 2221, which are adjacent and arranged in parallel between the magnetic yoke 21 and the second magnet 2222, so that the multiple first magnets 2221 cooperate to form a square bar or plate structure, which is not limited here. The third magnet 2223 of the intermediate magnetic component 221 can be an integral square bar or plate structure; or, the third magnet 2223 includes multiple third magnets 2223, which are adjacent and arranged in parallel on the side of the second magnet 2222 facing away from the first magnet 2221, so that the multiple third magnets 2223 cooperate to form a square bar or plate structure, which is not limited here.

[0129] Optionally, the first magnet 2221 of the Halbach magnetic circuit 222 and the first center magnet 2211 of the intermediate magnetic assembly 221 are an integrally formed structure, which can simplify the processing steps and assembly steps. Optionally, the third magnet 2223 of the Halbach magnetic circuit 222 and the second center magnet 2213 of the intermediate magnetic assembly 221 are an integrally formed structure, which can simplify the processing steps and assembly steps, which are not limited here.

[0130] In this embodiment, the thickness of the first magnet 2221 along the vertical direction may be equal to the thickness of the first center magnet 2211 along the vertical direction. That is, the thickness of the first magnet 2221 along the moving direction of the voice coil 32 is the same as the thickness of the first center magnet 2211 along the moving direction of the voice coil 32. Of course, in other embodiments, the thickness of the first magnet 2221 along the vertical direction may be different from the thickness of the first center magnet 2211 along the vertical direction, which is not limited here.

[0131] Optionally, the thickness of the second magnet 2222 along the vertical direction is greater than or equal to the thickness of the central magnetic plate 2212 along the vertical direction. That is, the thickness of the second magnet 2222 along the moving direction of the voice coil 32 is the same as the thickness of the central magnetic plate 2212 along the moving direction of the voice coil 32.

[0132] In one embodiment, the thickness of the third magnet 2223 along the vertical direction is less than or equal to the thickness of the second central magnet 2213 along the vertical direction.

[0133] In this embodiment, if Figure 1 , Figure 3 , Figure 4 , Figures 6 to 9 As shown, the thickness of the third magnet 2223 along the moving direction of the voice coil 32 may be smaller than the thickness of the second center magnet 2213 along the moving direction of the voice coil 32. That is, the side surface of the second center magnet 2213 facing away from the center magnetic plate 2212 protrudes from the side surface of the third magnet 2223 facing away from the second magnet 2222 to form a protrusion.

[0134] It can be understood that the vibration system 3 is provided with a through structure for the protrusion to pass through. When the sound-generating device 100 is applied to an electronic device, in order to reduce the Z-direction height of the electronic device, the protrusion of the intermediate magnetic component 221 in the sound-generating 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 of the intermediate magnetic component 221 and the vibration system 3, which is not limited here.

[0135] Of course, in other implementations, the thickness of the third magnet 2223 along the moving direction of the voice coil 32 may be the same as the thickness of the second central magnet 2213 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 central magnetic part 22, which is not limited here.

[0136] In one embodiment, a projection of at least a portion of the second magnet 2222 along a vibration direction perpendicular to the vibration system 3 coincides with a projection of the voice coil 32 along a vibration direction perpendicular to the vibration system 3 .

[0137] Optionally, at least part of the projection of the second magnet 2222 along the horizontal direction coincides with the projection of the voice coil 32 along the horizontal direction. It can be understood that such a configuration places the voice coil 32 in a more reasonable magnetic field 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 magnet 2222 along the horizontal direction is located in the projection of the voice coil 32 along the horizontal direction.

[0138] In one embodiment, at least a portion of the projection of the central magnetic conductive plate 2212 along the vibration direction perpendicular to the vibration system 3 coincides with the projection of the second magnet 2222 along the vibration direction perpendicular to the vibration system 3 .

[0139] Optionally, at least a portion of the projection of the central magnetic plate 2212 in the horizontal direction overlaps with the projection of the second magnet 2222 in the horizontal direction. It can be understood that such an arrangement allows the magnetic flux lines of the first central magnet 2211 and the second central magnet 2213 of the intermediate magnetic assembly 221 to gather on the central magnetic plate 2212, and the magnetic flux lines of the first magnet 2221 and the third magnet 2223 of the superimposed Halbach magnetic circuit 222 to gather on the second magnet 2222, pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, and the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound device 100 and improve the sound quality of the audio output by the sound device 100.

[0140] In one embodiment, the Halbach magnetic circuit 222 is arranged around the outer circumference of the intermediate magnetic component 221; the second magnet 2222 forms a closed integrated ring structure; or, the second magnet 2222 includes a plurality of second magnets 2222, and adjacent second magnets 2222 are connected end to end to form a closed ring structure; or, the second magnet 2222 includes a plurality of second magnets 2222, and the plurality of second magnets 2222 are arranged around the outer circumference of the intermediate magnetic component 221, and there are gaps between adjacent second magnets 2222.

[0141] In this embodiment, the outer periphery of the intermediate magnetic assembly 221 is provided with a Halbach magnetic circuit 222. Optionally, the Halbach magnetic circuit 222 can be optionally arranged in an annular shape, in which case the Halbach magnetic circuit 222 is arranged around the outer periphery of the intermediate magnetic assembly 221; or, the Halbach magnetic circuit 222 includes a plurality of Halbach magnetic circuits 222, and the plurality of Halbach magnetic circuits 222 are arranged around the outer periphery of the intermediate magnetic assembly 221. Of course, in other embodiments, the Halbach magnetic circuit 222 includes a plurality of Halbach magnetic circuits 222, and the plurality of Halbach magnetic circuits 222 are arranged around and spaced apart from the outer periphery of the intermediate magnetic assembly 221, that is, there is a gap between adjacent second magnets 2222.

[0142] It can be understood that when the Halbach magnetic circuit 222 is arranged in a ring shape, the first magnet 2221, the second magnet 2222, and the third magnet 2223 are all arranged as a closed integral ring structure; or, the first magnet 2221 is a closed integral ring structure, the second magnet 2222 and the third magnet 2223 each include a plurality of adjacent second magnets 2222 connected end to end to form a closed ring structure, and adjacent third magnets 2223 connected end to end to form a closed ring structure; or, the second magnet 2222 forms a closed integral ring structure. , the first magnet 2221 and the third magnet 2223 each include a plurality of adjacent first magnets 2221 connected end to end to form a closed ring structure, and adjacent third magnets 2223 connected end to end to form a closed ring structure; or, the third magnet 2223 forms a closed integrated ring structure, the first magnet 2221 and the second magnet 2222 each include a plurality of adjacent first magnets 2221 connected end to end to form a closed ring structure, and adjacent second magnets 2222 connected end to end to form a closed ring structure, which is not limited here.

[0143] Of course, the Halbach magnetic circuit 222 includes multiple Halbach magnetic circuits 222, which are arranged around the outer periphery of the intermediate magnetic component 221. At this time, the first magnet 2221, the second magnet 2222, and the third magnet 2223 all include multiple ones. Adjacent first magnets 2221 are connected end to end to form a closed ring structure, adjacent second magnets 2222 are connected end to end to form a closed ring structure, and adjacent third magnets 2223 are connected end to end to form a closed ring structure. The first magnet 2221, the second magnet 2222, and the third magnet 2223 are all arranged one by one, and no limitation is made here. Alternatively, the Halbach magnetic circuit 222 includes multiple Halbach magnetic circuits 222, which are arranged around the outer periphery of the intermediate magnetic component 221. In this case, the first magnet 2221, the second magnet 2222, and the third magnet 2223 each include multiple ones, and adjacent first magnets 2221 are spaced to form an annular structure with a gap, adjacent second magnets 2222 are spaced to form an annular structure with a gap, and adjacent third magnets 2223 are spaced to form an annular structure with a gap, and the first magnet 2221, the second magnet 2222, and the third magnet 2223 are all arranged in a one-to-one correspondence, which is not limited here.

[0144] In one embodiment, the thickness of the Halbach magnetic circuit 222 along the vertical direction is smaller than the thickness of the intermediate magnetic assembly 221 along the vertical direction, the diaphragm 31 is annular, and the inner periphery of the diaphragm 31 is fixed to the end surface of the Halbach magnetic circuit 222 away from the magnetic yoke 21; further, the top surface of the diaphragm 31 away from the magnetic yoke 21 is not higher than the top surface of the intermediate magnetic assembly 221 away from the magnetic yoke 21. In this way, the overall thickness of the product can be reduced.

[0145] In one embodiment, the Halbach magnetic circuit 222 also includes a first magnetic conductive plate 2224; the first magnetic conductive plate 2224 is disposed between the first magnet 2221 and the second magnet 2222; and / or, the first magnetic conductive plate 2224 is disposed between the third magnet 2223 and the second magnet 2222; and / or, the first magnetic conductive plate 2224 is adjacent to and arranged side by side with the second magnet 2222, and is located between the first magnet 2221 and the third magnet 2223.

[0146] In this embodiment, if Figures 7 to 13 As shown, by arranging the first magnetic conductive plate 2224 between the second magnet 2222 and the first magnet 2221 and / or the third magnet 2223, the Halbach magnetic circuit 222 can generate a stronger magnetic field, thereby increasing the density of the magnetic flux in 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.

[0147] The first magnetic conductive plate 2224 may be arranged between the first magnet 2221 and the second magnet 2222; or, the first magnetic conductive plate 2224 may be arranged between the third magnet 2223 and the second magnet 2222; or, the first magnetic conductive plate 2224 may be arranged between the first magnet 2221 and the second magnet 2222, and the first magnetic conductive plate 2224 may be arranged between the third magnet 2223 and the second magnet 2222 at the same time, and no limitation is made here.

[0148] Of course, in other embodiments, such as Figures 10 to 13 As shown, the first magnetic conductive plate 2224 and the second magnet 2222 may be arranged adjacent to and side by side with each other, and located between the first magnet 2221 and the third magnet 2223, which is not limited here. Optionally, the first magnetic conductive plate 2224 and the second magnet 2222 are arranged adjacent to and side by side with each other, and are located between the first magnet 2221 and the third magnet 2223.

[0149] It should be noted that the first magnetic conductive plate 2224 can be an integral square bar or plate-shaped structure, which is arranged between the second magnet 2222 and the first magnet 2221 and / or the third magnet 2223; or, the first magnetic conductive plate 2224 includes multiple first magnetic conductive plates 2224, which are adjacent to and arranged in parallel between the second magnet 2222 and the first magnet 2221 and / or the third magnet 2223, so that the multiple first magnetic conductive plates 2224 cooperate to form a square plate-shaped structure, which is not limited here.

[0150] Optionally, the first magnetic conductive plate 2224 and the central magnetic conductive plate 2212 may be integrally formed, which can effectively simplify the processing steps and the assembly steps.

[0151] In one embodiment, the intermediate magnetic assembly 221 further includes a third central magnet 2214; the third central magnet 2214 is disposed between the central magnetic conductive plate 2212 and the first central magnet 2211 and / or the second central magnet 2213, the magnetization direction of the third central magnet 2214 is perpendicular to the magnetization direction of the first central magnet 2211 and the second central magnet 2213, and the third central magnet 2214 and the second magnet 2222 are an integrally formed structure. It can be understood that this can effectively simplify the processing steps and assembly steps.

[0152] In one embodiment, the intermediate magnetic component 221 is arranged in a square shape, and the intermediate magnetic component 221 has a short axis side and a long axis side connected end to end; the two short axis sides of the intermediate magnetic component 221 are respectively provided with a Halbach magnetic circuit 222; and / or, the two long axis sides of the intermediate magnetic component 221 are respectively provided with a Halbach magnetic circuit 222.

[0153] It can be understood that the Halbach magnetic circuit 222 is arranged on at least one side of the middle magnetic assembly 221, that is, when there is one Halbach magnetic circuit 222, the Halbach magnetic circuit 222 is arranged on one short axis side or one long axis side of the middle magnetic assembly 221. When there are two Halbach magnetic circuits 222, the two Halbach magnetic circuits 222 are respectively arranged on the two short axis sides of the middle magnetic assembly 221; or, the two Halbach magnetic circuits 222 are respectively arranged on the two long axis sides of the middle magnetic assembly 221. When there are three Halbach magnetic circuits 222, the three Halbach magnetic circuits 222 are respectively arranged on the two short axis sides and one long axis side of the middle magnetic assembly 221; or, the three Halbach magnetic circuits 222 are respectively arranged on the two long axis sides and one short axis side of the middle magnetic assembly 221. When there are four Halbach magnetic circuits 222, the four Halbach magnetic circuits 222 are respectively arranged corresponding to one side of the intermediate magnetic component 221, that is, the two short axis sides of the intermediate magnetic component 221 are respectively provided with Halbach magnetic circuits 222, and the two long axis sides of the intermediate magnetic component 221 are respectively provided with Halbach magnetic circuits 222, which is not limited here.

[0154] In one embodiment, if Figures 1 to 5 As shown, the sound-generating device 100 also includes a housing 1, and 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 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.

[0155] 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.

[0156] 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 .

[0157] 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.

[0158] 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.

[0159] 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 .

[0160] 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.

[0161] 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.

[0162] In this embodiment, if Figures 2 to 5 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.

[0163] It can be understood that by providing the centering support 34, the lead wire of the voice coil 32 can be connected to the external circuit by using the centering support 34, and the voice coil 32 can be prevented from swinging or polarizing during vibration by using the centering support 34. Optionally, the inner fixing portion 342 is provided with an inner pad, and the lead wire of the voice coil 32 extends along the connecting portion 332 to the inner pad.

[0164] 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.

[0165] 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.

[0166] 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 .

[0167] 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.

[0168] 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 / or the edge magnetic portion 23, 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.

[0169] 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.

[0170] 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.

[0171] 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 central magnetic portion 22, and at least a portion of the intermediate magnetic component 221 is protruded from the inner ring hole 312.

[0172] 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 .

[0173] 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.

[0174] In this embodiment, the protruding portion of the central magnetic portion 22 is protruding from the inner ring hole 312 , that is, the inner ring portion 311 of the diaphragm 31 is connected to the Halbach magnetic circuit 222 of the central magnetic portion 22 .

[0175] 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.

[0176] In one embodiment, if Figures 1 to 5 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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 vibration system (3), the vibration system (3) comprising a diaphragm (31) and a voice coil (32) connected to the diaphragm (31); 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 voice coil (32) being arranged corresponding to the magnetic gap (24), the central magnetic portion (22) comprising an intermediate magnetic component (221) and a Halbach magnetic circuit (222), the Halbach magnetic circuit (222) being arranged on at least one side of the intermediate magnetic component (221) perpendicular to the vibration direction of the vibration system (3), the intermediate magnetic component (221) comprising a first central magnet (2211) and a central magnetic plate (2212) arranged in a stacked manner, the first central magnet (2211) being connected to the magnetic yoke (21).

2. The sound-generating device (100) according to claim 1, characterized in that: The intermediate magnetic assembly (221) further comprises a second central magnet (2213), wherein the second central magnet (2213) is arranged on a side of the central magnetic conductive plate (2212) facing away from the first central magnet (2211); The first central magnet (2211) and the second central magnet (2213) are both magnetized along the vibration direction of the vibration system (3), and the magnetization direction of the first central magnet (2211) is opposite to the magnetization direction of the second central magnet (2213).

3. The sound-generating device (100) according to claim 2, characterized in that: The intermediate magnetic assembly (221) further comprises a third central magnet (2214); the third central magnet (2214) is arranged between the first central magnet (2211) and the central magnetic conductive plate (2212); and / or the third central magnet (2214) is arranged between the second central magnet (2213) and the central magnetic conductive plate (2212); wherein the magnetization direction of the third central magnet (2214) is arranged perpendicular to the magnetization directions of the first central magnet (2211) and the second central magnet (2213); And / or, the central magnetic conductive plate (2212) includes a plurality of central magnetic conductive plates (2212), and the plurality of central magnetic conductive plates (2212) are arranged adjacent to and side by side, and are located between the first central magnet (2211) and the second central magnet (2213).

4. The sound-generating device (100) according to claim 2, 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 central magnet (2211), the second central magnet (2213) and the side magnet (231) are all magnetized along the vibration direction of the vibration system (3); the magnetization direction of the first central magnet (2211) is opposite to the magnetization direction of the side magnet (231) of the side magnet portion (23); and the magnetization direction of the second central magnet (2213) 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 2, characterized in that: The Halbach magnetic circuit (222) comprises a first magnet (2221), a second magnet (2222) and a third magnet (2223) which are stacked, and the first magnet (2221) is connected to the magnetic yoke (21); The first magnet (2221) and the third magnet (2223) are both magnetized along the vibration direction of the vibration system (3), and the magnetization direction of the second magnet (2222) is arranged perpendicular to the magnetization directions of the first magnet (2221) and the third magnet (2223).

6. The sound-generating device (100) according to claim 5, characterized in that: The magnetization direction of the first magnet (2221) is opposite to the magnetization direction of the third magnet (2223); And / or, the magnetization direction of the first magnet (2221) is the same as the magnetization direction of the first central magnet (2211), and the magnetization direction of the third magnet (2223) is the same as the magnetization direction of the second central magnet (2213); And / or, the polarity of the end of the second magnet (2222) away from the intermediate magnetic component (221) is the same as the polarity of the end of the first magnet (2221) and the end of the third magnet (2223) close to the second magnet (2222); And / or, the second magnet (2222) includes a plurality of second magnets (2222), and the plurality of second magnets (2222) are arranged adjacent to and side by side, and are located between the first magnet (2221) and the third magnet (2223).

7. The sound-generating device (100) according to claim 5, characterized in that: The first magnet (2221) and the first central magnet (2211) are an integrally formed structure; And / or, the thickness of the first magnet (2221) along the vertical direction is equivalent to the thickness of the first central magnet (2211) along the vertical direction; And / or, the third magnet (2223) and the second central magnet (2213) are an integrally formed structure; And / or, the thickness of the third magnet (2223) along the vertical direction is less than or equal to the thickness of the second central magnet (2213) along the vertical direction; And / or, the thickness of the second magnet (2222) along the vertical direction is greater than or equal to the thickness of the central magnetic conductive plate (2212) along the vertical direction.

8. The sound-generating device (100) according to claim 5, characterized in that: The projection of at least part of the second magnet (2222) 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); And / or, at least a portion of the projection of the central magnetic conductive plate (2212) along the vibration direction perpendicular to the vibration system (3) coincides with the projection of the second magnet (2222) along the vibration direction perpendicular to the vibration system (3).

9. The sound-generating device (100) according to claim 5, characterized in that: The Halbach magnetic circuit (222) is arranged around the outer periphery of the intermediate magnetic component (221); The second magnet (2222) forms a closed integral ring structure; or, the second magnet (2222) includes a plurality of second magnets (2222), and adjacent second magnets (2222) are connected end to end to form a closed ring structure; or, the second magnet (2222) includes a plurality of second magnets (2222) arranged around the outer periphery of the intermediate magnetic component (221), and there are gaps between adjacent second magnets (2222).

10. The sound-generating device (100) according to claim 5, characterized in that: The Halbach magnetic circuit (222) further includes a first magnetic conductive plate (2224); The first magnetic conductive plate (2224) is arranged between the first magnet (2221) and the second magnet (2222); and / or, the first magnetic conductive plate (2224) is arranged between the third magnet (2223) and the second magnet (2222); and / or, the first magnetic conductive plate (2224) is adjacent to and arranged side by side with the second magnet (2222), and is located between the first magnet (2221) and the third magnet (2223).

11. The sound-generating device (100) according to claim 10, characterized in that: The first magnetic conductive plate (2224) and the second magnet (2222) are arranged adjacent to each other and alternately, and are located between the first magnet (2221) and the third magnet (2223); And / or, the first magnetic conductive plate (2224) and the central magnetic conductive plate (2212) are an integrally formed structure; And / or, the intermediate magnetic component (221) further comprises a third central magnet (2214); the third central magnet (2214) is arranged between the central magnetic conductive plate (2212) and the first central magnet (2211) and / or the second central magnet (2213); the magnetization direction of the third central magnet (2214) is arranged perpendicular to the magnetization directions of the first central magnet (2211) and the second central magnet (2213); the third central magnet (2214) and the second magnet (2222) are an integrally formed structure.

12. The sound-generating device (100) according to claim 1, characterized in that: The intermediate magnetic component (221) is arranged in a square shape, and the intermediate magnetic component (221) has a short axis side and a long axis side connected end to end; The two short axis sides of the intermediate magnetic component (221) are respectively provided with the Halbach magnetic circuit (222); and / or, the two long axis sides of the intermediate magnetic component (221) are respectively provided with the Halbach magnetic circuit (222).

13. The sound-generating device (100) according to any one of claims 1 to 12, 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).

14. The sound-generating device (100) according to claim 13, 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).

15. The sound-generating device (100) according to claim 13, 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).

16. The sound-generating device (100) according to claim 15, 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).

17. The sound-generating device (100) according to claim 15, 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 central magnetic portion (22), and at least a portion of the intermediate magnetic component (221) is protruding from the inner ring hole (312).

18. The sound-generating device (100) according to claim 17, 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).

19. An electronic device, characterized in that: The electronic device comprises the sound emitting device (100) according to any one of claims 1 to 18.

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