Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a vibration system and a magnetic circuit system, the magnetic circuit system comprises a magnetic conductive yoke, a central magnetic part and an edge magnetic part, the edge magnetic part and the central magnetic part are spaced to form a magnetic gap, one end of a voice coil of the vibration system is suspended in the magnetic gap, and the other end of the voice coil is suspended in the magnetic gap. The central magnetic part comprises a middle magnetic assembly and a Halbach magnetic circuit arranged around the middle magnetic assembly. The Halbach magnetic circuit comprises a first magnet, a second magnet and a third magnet which are sequentially arranged on the magnetic conductive yoke in a stacked mode. Wherein the first magnet and the third magnet are both magnetized in the direction perpendicular to the vibration direction of the vibration system, the magnetizing direction of the first magnet is opposite to the magnetizing direction of the third magnet, and the second magnet is magnetized in the vibration direction of the vibration system. According to the sound production device, the central magnetic part of the magnetic circuit system is optimized, so that the magnetic induction lines are effectively gathered in the magnetic gap, the BL value is increased, the sensitivity of the sound production device is improved, and the sound effect of the whole machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducer, and 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 demands for the sound quality and sensitivity of speakers in electronic devices are getting 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, and 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 in the speaker, which leads to a smaller magnetic field force on the voice coil, making the sound-generating device low in sensitivity and poor in overall acoustic performance and sound effects. Summary of the invention

[0004] The main purpose of the present invention 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 optimizes the central magnetic part of the magnetic circuit system, designs and adjusts the position and magnetic induction direction of the magnet, so that the magnetic flux lines are effectively gathered in the magnetic gap, thereby increasing the BL value of the sound-generating device, improving the sensitivity of the sound-generating device, and then improving the sound effect of the whole machine.

[0005] To achieve the above object, the present invention provides a sound-generating device, comprising:

[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 comprising a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the side magnetic portion being located outside the central magnetic portion and spaced apart from the central magnetic portion to form a magnetic gap, one end of the voice coil being suspended in the magnetic gap, the central magnetic portion comprising an intermediate magnetic component and a Halbach magnetic circuit arranged around the intermediate magnetic component, the Halbach magnetic circuit comprising a first magnet, a second magnet and a third magnet sequentially stacked on the magnetic yoke;

[0008] The first magnet and the third magnet are both magnetized along a vibration direction perpendicular to the vibration system, and the magnetization direction of the first magnet is opposite to the magnetization direction of the third magnet, and the second magnet is magnetized along the vibration direction of the vibration system.

[0009] In one embodiment, the magnetic pole of the first magnet close to the intermediate magnetic component is the same as the magnetic pole of the third magnet close to the magnetic gap, and the magnetic pole of the first magnet close to the intermediate magnetic component is the same as the magnetic pole of the second magnet close to the third magnet;

[0010] And / or, the magnetization direction of the first magnet is along the direction from the magnetic gap to the intermediate magnetic component, and the magnetization direction of the third magnet is along the direction from the intermediate magnetic component to the magnetic gap; or, the magnetization direction of the first magnet is along the direction from the intermediate magnetic component to the magnetic gap, and the magnetization direction of the third magnet is along the direction from the magnetic gap to the intermediate magnetic component.

[0011] In one embodiment, the projection of the voice coil along the vibration direction perpendicular to the vibration system is located within the projection range of the third magnet along the vibration direction perpendicular to the vibration system;

[0012] And / or, the thickness of the third magnet along the vibration direction of the vibration system is greater than or equal to the sum of the thicknesses of the first magnet and the second magnet along the vibration direction of the vibration system;

[0013] And / or, along the vibration direction of the vibration system, the first magnet and the second magnet are both located below an end of the voice coil away from the diaphragm.

[0014] In one embodiment, the first magnet forms a closed integral ring structure; or, the first magnet includes a plurality of first magnets, and adjacent first magnets are connected end to end to form a closed ring structure; or, the first magnet includes a plurality of first magnets, and the plurality of first magnets are arranged around the outer periphery of the intermediate magnetic component, and there are gaps between adjacent first magnets;

[0015] And / or, 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 a plurality of second magnets are arranged around the outer periphery of the intermediate magnetic component, and there are gaps between adjacent second magnets;

[0016] And / or, the third magnet forms a closed integrated ring structure; or, the third magnet includes a plurality of adjacent third magnets connected end to end to form a closed ring structure; or, the third magnet includes a plurality of third magnets, a plurality of third magnets are arranged around the outer circumference of the intermediate magnetic component, and there are gaps between adjacent third magnets.

[0017] In one embodiment, the intermediate magnetic assembly includes a first central magnet, a central magnetic plate and a second central magnet sequentially stacked on the magnetic yoke;

[0018] Wherein, both the first central magnet and the second central magnet are 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.

[0019] 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;

[0020] Among them, the second magnet, the first central magnet, the second central magnet and the side magnet are all magnetized along the vibration direction of the vibration system, the magnetization direction of the second magnet is the same as the magnetization direction of the first central magnet, and the magnetization direction of the second central magnet is the same as the magnetization direction of the side magnet.

[0021] In one embodiment, the polarity of the first magnet near the middle magnetic assembly is the same as the polarity of the first center magnet near the center magnetic plate, and the polarity of the first magnet near the middle magnetic assembly is the same as the polarity of the side magnet near the magnetic yoke.

[0022] And / or, the thickness of the first central magnet along the vibration direction of the vibration system is greater than or equal to the sum of the thicknesses of the first magnet and the second magnet along the vibration direction of the vibration system;

[0023] And / or, the projection of the central magnetic conductive plate along the vibration direction perpendicular to the vibration system is located within the projection range of the third magnet along the vibration direction perpendicular to the vibration system.

[0024] In one embodiment, the first central magnet is an integral plate-shaped structure; or, the first central magnet includes a plurality of first central magnets, the plurality of first central magnets are adjacent to and laid flat between the central magnetic conductive plate and the magnetic conductive yoke, the plurality of first central magnets are magnetized along the vibration direction of the vibration system, and the magnetization directions of the plurality of first central magnets are the same;

[0025] 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;

[0026] And / or, the second central magnet is an integral plate-shaped structure; or, the second central magnet includes a plurality of second central magnets, the plurality of second central magnets are adjacent to and laid flat on a side of the central magnetic conductive plate facing away from the first central magnet, the plurality of second central magnets are magnetized along the vibration direction of the vibration system, and the plurality of second central magnets have the same magnetization direction.

[0027] In one embodiment, one end of the intermediate magnetic component facing away from the magnetic yoke protrudes from a surface of the third magnet facing away from the second magnet to form a protrusion, the diaphragm is annular, and the inner periphery of the diaphragm is fixed to the third magnet and arranged around the protrusion;

[0028] And / or, the top surface of the diaphragm facing away from the magnetic circuit system is not higher than the top surface of the intermediate magnetic component facing away from the magnetic yoke.

[0029] In one embodiment, an edge of the third magnet is provided with an avoidance structure, and the avoidance structure is at least one of an inclined surface, a fillet, a chamfer, and a step structure;

[0030] The avoidance structure is disposed around the periphery of the third magnet facing away from the second magnet; or, the avoidance structure includes a plurality of avoidance structures, the plurality of avoidance structures are arranged at intervals, and are disposed around the periphery of the third magnet facing away from the second magnet; or, the avoidance structure includes a plurality of adjacent avoidance structures connected end to end to form a closed ring structure, and are disposed around the periphery of the third magnet facing away from the second magnet;

[0031] And / or, an angle formed by the avoidance structure and a surface of the third magnet facing away from the second magnet is greater than 90° and less than 180°.

[0032] 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 outer periphery of the diaphragm.

[0033] In one embodiment, the side magnetic conductive plate and the housing are an integrally formed structure;

[0034] And / or, the diaphragm is annular, the inner periphery of the diaphragm is fixed to the third magnet, 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.

[0035] In one embodiment, the vibration system further comprises a frame, the frame comprising a main body and a connecting portion connected to a periphery of the main body, the main body being disposed between the diaphragm and the voice coil;

[0036] The vibration system also includes a centering support plate, which includes an external fixing portion, an internal fixing portion, and an elastic arm 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.

[0037] 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 third magnet, and at least a portion of the intermediate magnetic component is protruded from the inner ring hole.

[0038] 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;

[0039] 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;

[0040] And / or, the diaphragm further comprises a reinforcement portion, wherein the reinforcement portion is disposed between the straight portion and the frame;

[0041] 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.

[0042] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0043] The sound-generating device of the technical solution of the present invention is provided by configuring the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part provided on the magnetic yoke, so that the side magnetic part is located on the outside of the central magnetic part and is spaced from the central magnetic part to form a magnetic gap, and suspending one end of the voice coil of the vibration system in the magnetic gap, so that current is passed through the voice coil, so that the voice coil vibrates in the magnetic field formed by the magnetic circuit system and drives the diaphragm to vibrate and produce sound; at the same time, by configuring the central magnetic part as an intermediate magnetic component and a Halbach magnetic circuit provided around the intermediate magnetic component, and configuring the Halbach magnetic circuit as a first magnet, a second magnet and a third magnet provided in sequence and stacked on the magnetic yoke, so that the first magnet and the third magnet are both arranged along the magnetic gap. The magnetization is performed perpendicular to the vibration direction of the vibration system, and the magnetization direction of the first magnet is opposite to that of the third magnet, and the second magnet is magnetized along the vibration direction of the vibration system. In this way, the Halbach magnetic circuit and the intermediate magnetic component cooperate with each other to effectively improve the magnetic field strength. The magnetic flux lines after the magnetic field superposition are effectively gathered in the magnetic gap, thereby increasing the density of the magnetic flux in the magnetic gap, increasing the number of magnetic force lines passing through the voice coil, increasing the magnetic field force on the voice coil, effectively improving the BL value, and improving the sensitivity of the sound-generating device. In this way, the flatness of the BL curve is improved, the FR frequency response curve is significantly improved, and the harmonic distortion THD is effectively reduced, so that the sound effect and performance of the whole machine are better improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0045] Figure 1 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0046] Figure 2 A schematic structural diagram of another perspective of an embodiment of a sound-generating device provided by the present invention;

[0047] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0048] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0049] Figure 5 A partial cross-sectional schematic diagram of an embodiment of a magnetic circuit system provided by the present invention;

[0050] Figure 6 A schematic structural diagram of an embodiment of a first magnet provided by the present invention;

[0051] Figure 7 This is a schematic structural diagram of an embodiment of a third magnet provided by the present invention.

[0052] Description of Figure Numbers:

[0053] 100. Sounding device; 1. Housing; 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. Protrusion; 222. Halbach magnetic circuit; 2221. First magnet; 2222. Second magnet; 2223. Third magnet; 23. Side magnetic part; 231. Side magnet; 232. Side Magnetic conductive 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 arm portion.

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) 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.

[0057] 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.

[0058] In addition, in the present invention, 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 invention.

[0059] 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 demands for the sound quality and sensitivity of speakers in electronic devices are getting higher and higher, and full-range and miniaturized speakers have become mainstream demands.

[0060] At present, the box space in electronic devices is getting smaller and smaller, and 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 in the speaker, which leads to a smaller magnetic field force on the voice coil, making the sound-generating device low in sensitivity and poor in overall acoustic performance and sound effects.

[0061] Based on the above concepts and problems, the present invention proposes a sound device 100. It is understandable that the sound device 100 can be applied to electronic devices, and the electronic devices can be headphones, mobile phones, MP3, MP4, computers, tablet computers, smart wearable devices, etc., which are not limited here.

[0062] Please refer to Figures 1 to 7 As shown, in the embodiment of the present invention, the sound-generating device 100 includes a vibration system 3 and a magnetic circuit system 2, 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, one end of the voice coil 32 is suspended in the magnetic gap 24, the central magnetic portion 22 includes an intermediate magnetic component 221 and The Halbach magnetic circuit 222 is arranged around the intermediate magnetic component 221, and the Halbach magnetic circuit 222 includes a first magnet 2221, a second magnet 2222 and a third magnet 2223 which are sequentially stacked on the magnetic yoke 21; wherein the first magnet 2221 and the third magnet 2223 are both magnetized along a vibration direction perpendicular to the vibration system 3, and the magnetization direction of the first magnet 2221 is opposite to the magnetization direction of the third magnet 2223, and the second magnet 2222 is magnetized along the vibration direction of the vibration system 3.

[0063] 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.

[0064] 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.

[0065] 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 2 to 4 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 .

[0066] 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.

[0067] 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.

[0068] 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.

[0069] It can be understood that by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 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 part 23, which is not limited here. In this embodiment, the side magnetic part 23 is located outside the central magnetic part 22, and is enclosed with the central magnetic part 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 the magnetic circuit system 2 and spaced or the center of the diaphragm 31 is connected to the central magnetic part 22 of the magnetic circuit system 2, etc., 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 set corresponding to the magnetic gap 24.

[0070] In this embodiment, the voice coil 32 may be 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. Of course, in other embodiments, the voice coil 32 may 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 arranged 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 arranged opposite to the magnetic gap 24, which is not limited here.

[0071] In order to realize the electrical connection between the voice coil 32 and the external circuit. Figures 2 to 4 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 .

[0072] 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.

[0073] In this embodiment, the central magnetic portion 22 is set as the intermediate magnetic component 221 and the Halbach magnetic circuit 222, so that the Halbach magnetic circuit 222 is arranged around the periphery of the intermediate magnetic component 221, and the Halbach magnetic circuit 222 is set as the first magnet 2221, the second magnet 2222 and the third magnet 2223 stacked on the magnetic yoke 21, so that the first magnet 2221 and the third magnet 2223 are magnetized along the vibration direction perpendicular to the vibration system 3, and the second magnet 2222 is magnetized along the vibration direction of the vibration system 3, that is, the magnetization direction of the first magnet 2221 and the third magnet 2223 is arranged perpendicular to the magnetization direction of the second magnet 2222, so that the first magnet 2221, the second magnet 2222 and the third magnet 2223 of the Halbach magnetic circuit 222 are used. The iron 2223 forms a Halbach magnetic array, forming a magnetic field with a relatively high 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. In this way, the magnetic field formed by the Halbach magnetic circuit 222 is superimposed on the magnetic field formed by the intermediate magnetic component 221 to further enhance the magnetic field strength, thereby increasing the density of the magnetic flux in the magnetic gap 24. In this way, the magnetic flux lines are effectively gathered in 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, effectively improving the BL value, improving the sensitivity of the sound-generating device 100, and effectively improving the flatness of the BL curve, so that the FR frequency response curve is significantly improved and the harmonic distortion THD is effectively reduced, so that the sound effect and performance of the whole machine are better improved.

[0074] Optionally, the vibration system 3 in this embodiment vibrates in the vertical direction, and the Halbach magnetic circuit 222 is arranged around the periphery of the intermediate magnetic component 221 in the horizontal direction. It should be noted that: Figures 4 to 7 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.

[0075] It can be understood that the first magnet 2221, the second magnet 2222 and the third magnet 2223 of the Halbach magnetic circuit 222 are optionally stacked on the magnetic yoke 21 in the vertical direction, and the first magnet 2221 and the third magnet 2223 are magnetized in a vibration direction perpendicular to the vibration system 3, and the second magnet 2222 is magnetized in the vibration direction of the vibration system 3, so that the Halbach magnetic circuit 222 forms a Halbach magnetic array, which can generate a strong magnetic field. The magnetic field generated by the Halbach magnetic array drives the voice coil 32 to drive the diaphragm 31 to vibrate and produce sound, so that there is a strong magnetic field at the voice coil 32, which is beneficial to improve 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-generating device 100, enhance the treble effect, and alleviate the distortion of the audio output by the sound-generating device 100 to a certain extent. The vibration of the diaphragm 31 is specifically that the edge of the diaphragm 31 is fixed, and the surface of the diaphragm 31 vibrates back and forth in a direction perpendicular to the surface of the diaphragm 31 .

[0076] The sound-generating device 100 of the present invention is provided 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, 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 central magnetic portion 22 as an intermediate magnetic component 221 and a magnetic gap 24 provided around the intermediate magnetic component 221, the sound-generating device 100 of the present invention is provided by configuring the magnetic circuit system 2 as a magnetic yoke 21 and a side magnetic portion 23, 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 central magnetic portion 22 as an intermediate magnetic component 221 and a magnetic gap 24 provided around the intermediate magnetic component 221, the side magnetic portion 23 is provided corresponding to the magnetic gap 24, and the voice coil 32 of the vibration system 3 is provided corresponding to the magnetic gap 24, and the voice coil 32 is provided corresponding to the magnetic gap 24, and the voice coil 32 is provided corresponding to the magnetic gap 24, and the voice coil 32 is provided corresponding to the magnetic The Halbach magnetic circuit 222 is arranged in a certain position, and the Halbach magnetic circuit 222 and the intermediate magnetic component 221 cooperate with each other to effectively improve the magnetic field strength, so that the magnetic flux lines after the magnetic field is superimposed are effectively gathered in the magnetic gap 24, thereby increasing the density of the magnetic flux in 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, effectively improving the BL value, and improving the sensitivity of the sound-emitting device 100. In this way, the flatness of the BL curve is improved, the FR frequency response curve is significantly improved, and the harmonic distortion THD is effectively reduced, so that the sound effect and performance of the whole machine are better improved.

[0077] In one embodiment, the magnetization direction of the first magnet 2221 is opposite to the magnetization direction of the third magnet 2223. Figures 4 to 7 As shown, the magnetic pole of the first magnet 2221 close to the middle magnetic component 221 is the same as the magnetic pole of the third magnet 2223 close to the magnetic gap 24, and the magnetic pole of the first magnet 2221 close to the middle magnetic component 221 is the same as the magnetic pole of the second magnet 2222 close to the third magnet 2223.

[0078] In this embodiment, if Figures 4 to 7 As shown, when the second magnet 2222 is magnetized from bottom to top, the magnetization direction of the first magnet 2221 is along the magnetic gap 24 toward the middle magnetic component 221, and the magnetization direction of the third magnet 2223 is along the middle magnetic component 221 toward the magnetic gap 24. At this time, the magnetic induction direction of the third magnet 2223 is radially outward, forming a magnetic field loop with the edge magnetic portion 23. The direction of the magnetic induction lines of the second magnet 2222 is perpendicular to the direction of the magnetic induction lines of the third magnet 2223, and the magnetic induction lines can be gathered and transferred to the third magnet 2223, which can reduce the discreteness of the magnetic field and increase the magnetic field. The magnetic induction direction of the first magnet 2221 is radially inward, and the magnetic field loop is formed with the edge magnetic portion 23. The third magnet 2223, the side magnet 23 and the first magnet 2221 cooperate to form a magnetic circuit, and the magnetic flux lines are gathered and transferred to the second magnet 2222, so as to reduce the discreteness of the magnetic field and increase the magnetic field. That is, the third magnet 2223, the side magnet 23 and the first magnet 2221 cooperate to form a magnetic circuit, and at the same time, the first magnet 2221 and the second magnet 2222 cooperate to gather the magnetic flux lines to the third magnet 2223, so as to reduce the discreteness of the magnetic field and increase the magnetic field. As a result, the central magnetic part 22 generates a magnetic field with a stronger magnetic field strength passing 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.

[0079] Of course, in other embodiments, when the second magnet 2222 is magnetized from top to bottom, the magnetization direction of the first magnet 2221 is along the direction from the middle magnetic component 221 to the magnetic gap 24, and the magnetization direction of the third magnet 2223 is along the direction from the magnetic gap 24 to the middle magnetic component 221. It can be understood that the third magnet 2223, the side magnetic part 23 and the first magnet 2221 cooperate to form a magnetic circuit, and at the same time, the first magnet 2221 and the second magnet 2222 cooperate to gather the magnetic flux lines to the third magnet 2223, which can reduce the dispersion of the magnetic field and increase the magnetic field, so that the central magnetic part 22 generates a magnetic field with a strong magnetic field strength passing 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.

[0080] In one embodiment, the projection of the voice coil 32 along the vibration direction perpendicular to the vibration system 3 is located within the projection range of the third magnet 2223 along the vibration direction perpendicular to the vibration system 3. It can be understood that such a configuration enables the magnetic flux lines of the first magnet 2221 and the second magnet 2222 of the Halbach magnetic circuit 222 to gather at the third magnet 2223 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24, so that the voice coil 32 is in a more reasonable magnetic field, so as to alleviate the distortion of the audio output by the sound device 100 and improve the sound quality of the audio output by the sound device 100.

[0081] In this embodiment, the thickness of the first magnet 2221 along the vibration direction of the vibration system 3 is less than the thickness of the third magnet 2223 along the vibration direction of the vibration system 3, and the thickness of the second magnet 2222 along the vibration direction of the vibration system 3 is less than the thickness of the third magnet 2223 along the vibration direction of the vibration system 3. Optionally, the thickness of the first magnet 2221 along the vibration direction of the vibration system 3 is equal to the thickness of the second magnet 2222 along the vibration direction of the vibration system 3.

[0082] Optionally, the thickness of the third magnet 2223 along the vibration direction of the vibration system 3 is greater than or equal to the sum of the thicknesses of the first magnet 2221 and the second magnet 2222 along the vibration direction of the vibration system 3. It can be understood that this can ensure that the voice coil 32 is in a more reasonable magnetic field, so that the magnetic flux lines of the first magnet 2221 and the second magnet 2222 of the central magnetic part 22 are gathered on the third magnet 2223 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24.

[0083] Optionally, the thickness of the third magnet 2223 along the vibration direction of the vibration system 3 is greater than or equal to twice the thickness of the first magnet 2221 along the vibration direction of the vibration system 3; and / or, the thickness of the third magnet 2223 along the vibration direction of the vibration system 3 is greater than or equal to twice the thickness of the second magnet 2222 along the vibration direction of the vibration system 3. It can be understood that this ensures that the Halbach magnetic circuit 222 forms a Halbach magnetic array, which can generate a stronger magnetic field.

[0084] In order to further ensure that the voice coil 32 is in a more reasonable magnetic field, in this embodiment, along the vibration direction of the vibration system 3, the first magnet 2221 and the second magnet 2222 are both located below the end of the voice coil 32 away from the diaphragm 31. It can be understood that in this way, the magnetic flux lines of the first magnet 2221 and the second magnet 2222 of the central magnetic part 22 can be gathered on the third magnet 2223 and pass through the magnetic gap 24, thereby increasing the density of the magnetic flux of the magnetic gap 24.

[0085] In one embodiment, the first magnet 2221 is an integral ring structure and is arranged around the intermediate magnetic assembly 221. Optionally, the first magnet 2221 forms a closed integral ring structure. It can be understood that the first magnet 2221 is arranged as an integrally formed structure, which is convenient for the processing of the first magnet 2211, and is also convenient for assembly and magnetization, effectively improving the production and assembly efficiency.

[0086] Of course, in other embodiments, the first magnet 2221 includes multiple first magnets. In one embodiment, the first magnet 2221 includes multiple first magnets 2221, and adjacent first magnets 2221 are connected end to end to form a closed ring structure and are arranged around the middle magnetic component 221. It can be understood that multiple first magnets 2221 are connected end to end to form a closed ring structure and are arranged around the middle magnetic component 221, that is, adjacent first magnets 2221 are abutted and connected to each other.

[0087] In another embodiment, the first magnet 2221 includes a plurality of first magnets 2221, and the plurality of first magnets 2221 are disposed around the outer periphery of the middle magnetic component 221, and there are gaps between adjacent first magnets 2221. It can be understood that the plurality of first magnets 2221 are spaced apart from each other and disposed around the middle magnetic component 221, and the adjacent first magnets 2221 are spaced apart from each other, so that the plurality of first magnets 2221 form a ring structure with gaps, which is not limited here.

[0088] In this embodiment, the intermediate magnetic component 221 is arranged in a square or rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. Optionally, the long side or the short side of the intermediate magnetic component 221 corresponds to a first magnet 2221 or a plurality of first magnets 2221, respectively, which is not limited here. The plurality of first magnets 2221 are magnetized in the horizontal direction, and the magnetization direction of the plurality of first magnets 2221 is from the magnetic gap 24 toward the intermediate magnetic component 221 or from the intermediate magnetic component 221 toward the magnetic gap 24, which is not limited here.

[0089] In one embodiment, the intermediate magnetic component 221 is arranged in a rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. The first magnet 2221 includes two, and the two first magnets 2221 are arranged corresponding to the two long sides respectively. The two first magnets 2221 are magnetized in the horizontal direction, and the magnetization directions of the two first magnets 2221 are opposite.

[0090] Of course, in other embodiments, the first magnet 2221 corresponding to the short side of the middle magnetic component 221 includes a plurality of first magnets 2221 , and the plurality of first magnets 2221 are adjacent to each other and arranged along the short side, which is not limited here.

[0091] In one embodiment, the intermediate magnetic component 221 is arranged in a rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. The first magnets 2221 include four, two first magnets 2221 are arranged corresponding to the two long sides respectively, and the other two first magnets 2221 are arranged corresponding to the two short sides respectively. The four first magnets 2221 are magnetized in a horizontal direction, and the magnetization directions of the two first magnets 2221 arranged corresponding to the long sides are opposite, and the magnetization directions of the two first magnets 2221 arranged corresponding to the short sides are opposite.

[0092] In one embodiment, the second magnet 2222 forms a closed integral ring structure and is disposed around the intermediate magnetic component 221. It is understandable that the second magnet 2222 can be selected as a ring magnet, that is, the second magnet 2222 forms a closed integral ring structure and is disposed around the intermediate magnetic component 221.

[0093] Of course, in other embodiments, the second magnet 2222 includes multiple ones. In one embodiment, the second magnet 2222 includes multiple ones, and the adjacent second magnets 2222 are connected end to end to form a closed ring structure, and are arranged around the middle magnetic component 221. It can be understood that the multiple second magnets 2222 are connected end to end to form a closed ring structure, and are arranged around the middle magnetic component 221, that is, the adjacent second magnets 2222 are abutted and connected to each other.

[0094] In another embodiment, the second magnet 2222 includes a plurality of second magnets 2222, which are disposed around the outer periphery of the intermediate magnetic component 221, and there are gaps between adjacent second magnets 2222. It can be understood that the plurality of second magnets 2222 are spaced apart from each other and disposed around the intermediate magnetic component 221, and the adjacent second magnets 2222 are spaced apart from each other, so that the plurality of second magnets 2222 form a ring structure with gaps, which is not limited here.

[0095] In one embodiment, the third magnet 2223 is an integral ring structure and is arranged around the intermediate magnetic assembly 221. Optionally, the third magnet 2223 forms a closed integral ring structure. It can be understood that the third magnet 2223 is arranged as an integrally formed structure, which is convenient for the processing of the third magnet 2223, as well as for assembly and magnetization, and effectively improves the production and assembly efficiency.

[0096] Of course, in other embodiments, the third magnet 2223 includes multiple third magnets. In one embodiment, the third magnet 2223 includes multiple third magnets 2223, and adjacent third magnets 2223 are connected end to end to form a closed ring structure, and are arranged around the middle magnetic component 221. It can be understood that multiple third magnets 2223 are connected end to end to form a closed ring structure, and are arranged around the middle magnetic component 221, that is, adjacent third magnets 2223 are abutted and connected to each other.

[0097] In another embodiment, the third magnet 2223 includes a plurality of third magnets 2223, and the plurality of third magnets 2223 are disposed around the outer periphery of the intermediate magnetic component 221, and there is a gap between adjacent third magnets 2223. It can be understood that the plurality of third magnets 2223 are spaced apart from each other and disposed around the intermediate magnetic component 221, and the adjacent third magnets 2223 are spaced apart from each other, so that the plurality of third magnets 2223 form a ring structure with a gap, which is not limited here.

[0098] In one embodiment, the intermediate magnetic component 221 is arranged in a rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. The third magnet 2223 includes two, and the two third magnets 2223 are arranged corresponding to the two long sides respectively. The two third magnets 2223 are magnetized in the horizontal direction, and the magnetization directions of the two third magnets 2223 are opposite.

[0099] Of course, in other embodiments, the third magnet 2223 corresponding to the long side of the middle magnetic component 221 includes a plurality of third magnets 2223 , and the plurality of third magnets 2223 are adjacent to each other and arranged along the long side, which is not limited here.

[0100] In one embodiment, the intermediate magnetic component 221 is arranged in a rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. The third magnet 2223 includes two, and the two third magnets 2223 are arranged corresponding to the two short sides respectively. The two third magnets 2223 are magnetized in the horizontal direction, and the magnetization directions of the two third magnets 2223 are opposite.

[0101] Of course, in other embodiments, the third magnet 2223 corresponding to the short side of the middle magnetic component 221 includes multiple third magnets 2223, and the multiple third magnets 2223 are adjacent to each other and arranged along the short side, which is not limited here.

[0102] In one embodiment, the intermediate magnetic component 221 is arranged in a rectangular shape, and the intermediate magnetic component 221 has a long side and a short side connected end to end. The third magnet 2223 includes four, two third magnets 2223 are arranged corresponding to the two long sides respectively, and the other two third magnets 2223 are arranged corresponding to the two short sides respectively. The four third magnets 2223 are all magnetized in the horizontal direction, the magnetization directions of the two third magnets 2223 arranged corresponding to the long sides are opposite, and the magnetization directions of the two third magnets 2223 arranged corresponding to the short sides are opposite.

[0103] Of course, in other embodiments, the third magnet 2223 corresponding to the long side or short side of the middle magnetic component 221 includes multiple third magnets 2223, and the multiple third magnets 2223 are adjacent and arranged along the long side or short side, which is not limited here.

[0104] In one embodiment, the intermediate magnetic component 221 includes a first central magnet 2211, a central magnetic plate 2212 and a second central magnet 2213 which are sequentially stacked on the magnetic yoke 21; wherein 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.

[0105] In this embodiment, if Figure 1 , Figures 3 to 5As shown, by setting the intermediate magnetic component 221 as a magnetic structure, the first central magnet 2211, the central magnetic plate 2212 and the second central magnet 2213 are stacked in sequence on the magnetic yoke 21 in the vertical direction, so that the first central magnet 2211 and the second central magnet 2213 are 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. In this way, the first central magnet 2211 and the second central magnet 2213 are magnetized along the vibration direction of the vibration system 3 by utilizing the magnetic conductivity of the central magnetic plate 2212. The magnetic flux lines of the center magnet 2211 and the second center magnet 2213 gather on the center magnetic conductive plate 2212 and are transmitted to the third magnet 2223 by the center magnetic conductive plate 2212, so that the intermediate magnetic component 221 generates a magnetic field with a relatively strong magnetic field strength, and the Halbach magnetic circuit 222 generates a magnetic field with a relatively strong magnetic field strength that passes through the magnetic gap 24, thereby increasing the density of the magnetic flux in 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.

[0106] The sound-generating device 100 of the present invention 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 central magnet 2213 provided on the magnetic yoke 21 in a stacked manner, Two central magnets 2213 are provided, and a Halbach magnetic circuit 222 is arranged on the periphery 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, and 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, so that the FR frequency response curve is significantly improved and the harmonic distortion THD is effectively reduced, so that the sound effect and performance of the whole machine are better improved.

[0107] In this embodiment, the magnetization direction of the second magnet 2222 is the same as that of the first center magnet 2211, and the magnetization direction of the second magnet 2222 is opposite to 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 second magnet 2222 of the Halbach magnetic circuit 222 are gathered on the third magnet 2223. In this way, 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.

[0108] It can be understood that when the first magnet 2221 and the third magnet 2223 are magnetized in the horizontal direction, the magnetic pole of the first magnet 2221 close to the middle magnetic assembly 221 is the same as the magnetic pole of the third magnet 2223 close to the magnetic gap 24. The magnetic pole of the first magnet 2221 close to the middle magnetic assembly 221 is the same as the magnetic pole of the first center magnet 2211 close to the center magnetic conductive plate 2212, the magnetic pole of the first magnet 2221 close to the middle magnetic assembly 221 is the same as the magnetic pole of the second magnet 2222 close to the third magnet 2223, and the magnetic pole of the third magnet 2223 close to the magnetic gap 24 is the same as the magnetic pole of the second center magnet 2213 close to the center magnetic conductive plate 2212.

[0109] It should be noted that the structure of the central magnetic part 22 in the present application is designed as an intermediate magnetic component 221 and a Halbach magnetic circuit 222 arranged around the periphery of the intermediate magnetic component 221, so that the intermediate magnetic component 221 adopts a counter-magnetic structure, and the Halbach magnetic circuit 222 is designed as a Halbach magnetic field. The central magnetic part 22 is layered, which can effectively reduce the magnetic field dispersion and increase the magnetic field strength at the magnetic gap 24, thereby effectively concentrating the magnetic induction into the magnetic gap 24 near the voice coil 32, enhancing the magnetic field strength, and the magnets in each layer are split, which can more effectively increase the utilization rate of the magnets. Compared with the magnetic circuit system in a conventional speaker, the magnetic field strength of the sound-generating device 100 of the present application can be increased by about 34%.

[0110] In one embodiment, the Halbach magnetic circuit 222 is arranged around the outer periphery of the middle magnetic component 221. It can be understood that the first magnet 2221, the second magnet 2222, and the third magnet 2223 of the Halbach magnetic circuit 222 are all configured as a closed integral ring structure; or, the first magnet 2221 of the Halbach magnetic circuit 222 is a closed integral ring structure, and 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 of the Halbach magnetic circuit 222 forms a closed integral ring structure. Structure, the first magnet 2221 and the third magnet 2223 each include a plurality, adjacent first magnets 2221 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; or, the third magnet 2223 of the Halbach magnetic circuit 222 forms a closed integrated ring structure, the first magnet 2221 and the second magnet 2222 each include a plurality, adjacent first magnets 2221 are connected end to end to form a closed ring structure, and adjacent second magnets 2222 are connected end to end to form a closed ring structure, which is not limited here.

[0111] Of course, in other embodiments, the first magnet 2221, the second magnet 2222, and the third magnet 2223 of the Halbach magnetic circuit 222 each include a plurality of them, and the adjacent first magnets 2221 are connected end to end to form a closed annular structure, the adjacent second magnets 2222 are connected end to end to form a closed annular structure, and the adjacent third magnets 2223 are connected end to end to form a closed annular structure, 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. Alternatively, the first magnet 2221, the second magnet 2222, and the third magnet 2223 of the Halbach magnetic circuit 222 each include a plurality of them, and the adjacent first magnets 2221 are spaced to form an annular structure with a gap, the adjacent second magnets 2222 are spaced to form an annular structure with a gap, and the 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.

[0112] 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; wherein the second magnet 2222, 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 second magnet 2222 is the same as the magnetization direction of the first center magnet 2211, and the magnetization direction of the second center magnet 2213 is the same as the magnetization direction of the edge magnet 231.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] In this embodiment, the second magnet 2222, the first center magnet 2211, the second center magnet 2213 and the side magnet 231 are all magnetized along the vibration direction of the vibration system 3, that is, they are all magnetized along the moving direction of the voice coil 32. Optionally, the magnetization direction of the second magnet 2222 is the same as the magnetization direction of the first center magnet 2211, and the magnetization direction of the second center magnet 2213 is the same as the magnetization direction of the side magnet 231.

[0118] Optionally, the polarity of the first magnet 2221 near the middle magnetic component 221 is the same as the polarity of the first center magnet 2211 near the center magnetic plate 2212, and the polarity of the first magnet 2221 near the middle magnetic component 221 is the same as the polarity of the side magnet 231 near the magnetic yoke 21.

[0119] In one embodiment, the projection of the central magnetic plate 2212 in the direction perpendicular to the vibration direction of the vibration system 3 is located within the projection range of the third magnet 2223 in the direction perpendicular to the vibration direction of the vibration system 3. It can be understood that such a configuration allows the magnetic flux lines of the first central magnet 2211 and the second central magnet 2213 of the intermediate magnetic assembly 221 to be gathered on the central magnetic plate 2212, and the magnetic flux lines of the first magnet 2221 and the second magnet 2222 of the superimposed Halbach magnetic circuit 222 to be gathered on the third magnet 2223, passing 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-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100.

[0120] Optionally, the thickness of the first central magnet 2211 along the vibration direction of the vibration system 3 is greater than or equal to the sum of the thicknesses of the first magnet 2221 and the second magnet 2222 along the vibration direction of the vibration system 3. It can be understood that such a configuration can ensure that the magnetic flux lines of the first central magnet 2211 and the second central magnet 2213 of the intermediate magnetic component 221 are gathered on the central magnetic conductive plate 2212, and are transmitted from the central magnetic conductive plate 2212 to the third magnet 2223 of the Halbach magnetic circuit 222 to 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-generating device 100 and improve the sound quality of the audio output by the sound-generating device 100.

[0121] Optionally, the first central magnet 2211 is an integral plate-shaped structure. Figures 3 to 5 As shown, by configuring the first central magnet 2211 as an integral plate-shaped structure, it is convenient for processing, assembling and magnetizing the first central magnet 2211, thereby effectively improving production and assembly efficiency.

[0122] In one embodiment, the first center magnet 2211 includes multiple first center magnets 2211, and the multiple first center magnets 2211 are adjacent and laid flat between the central magnetic plate 2212 and the magnetic yoke 21. The multiple first center magnets 2211 are magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the multiple first center magnets 2211 are the same.

[0123] In this embodiment, the first center magnet 2211 is provided in plurality, and the plurality of first center magnets 2211 are laid flat between the center magnetic conductive plate 2212 and the magnetic conductive yoke 21. Optionally, the plurality of first center magnets 2211 are magnetized in the vertical direction, and the magnetization directions of the plurality of first center magnets 2211 are the same. That is, the plurality of first center magnets 2211 are magnetized in the direction of movement of the voice coil 32, and the plurality of first center magnets 2211 are magnetized upward or downward at the same time, which is not limited here. Optionally, the magnetic poles of the plurality of first center magnets 2211 close to the center magnetic conductive plate 2212 are the same.

[0124] It can be understood that the first center magnet 2211 can be an integral square plate-like structure, arranged between the central magnetic plate 2212 and the magnetic yoke 21; or, the first center magnet 2211 includes multiple first center magnets 2211, and the multiple first center magnets 2211 are adjacently and parallelly arranged between the central magnetic plate 2212 and the magnetic yoke 21, so that the multiple first center magnets 2211 cooperate to form a square plate-like structure, which is not limited here.

[0125] In this embodiment, the voice coil 32 is in a rectangular ring shape, and has a long side and a short side connected end to end. Optionally, a plurality of first central magnets 2211 are arranged adjacently and in parallel along the direction of the long side; or, a plurality of first central magnets 2211 are arranged adjacently and in parallel along the direction of the short side; or, a portion of the first central magnets 2211 are arranged adjacently and in parallel along the direction of the long side, and another portion of the first central magnets 2211 are arranged at both ends of a portion of the first central magnets 2211 along the direction of the short side, or vice versa, which is not limited here.

[0126] In one embodiment, 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 .

[0127] 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.

[0128] 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.

[0129] Optionally, the second central magnet 2213 is an integral plate-shaped structure. Figures 3 to 5 As shown, by configuring the second central magnet 2213 as an integral plate-shaped structure, the processing, assembly and magnetization of the second central magnet 2213 are facilitated, thereby effectively improving the production and assembly efficiency.

[0130] In one embodiment, the second center magnet 2213 includes multiple second center magnets 2213, which are adjacent and laid flat on the side of the center magnetic conductive plate 2212 facing away from the first center magnet 2211. The multiple second center magnets 2213 are magnetized along the vibration direction of the vibration system 3, and the magnetization directions of the multiple second center magnets 2213 are the same.

[0131] In this embodiment, the second center magnet 2213 is provided in plurality, and the plurality of second center magnets 2213 are laid flat on the side of the center magnetic conductive plate 2212 facing away from the first center magnet 2211. Optionally, the plurality of second center magnets 2213 are magnetized in the vertical direction, and the magnetization directions of the plurality of second center magnets 2213 are the same. That is, the plurality of second center magnets 2213 are magnetized in the direction of movement of the voice coil 32, and the plurality of second center magnets 2213 are magnetized upward or downward at the same time, which is not limited here. Optionally, the magnetic poles of the plurality of second center magnets 2213 close to the side of the center magnetic conductive plate 2212 are the same.

[0132] In this embodiment, the voice coil 32 is in a rectangular ring shape, and has a long side and a short side connected end to end. Optionally, a plurality of second center magnets 2213 are arranged adjacently and in parallel along the direction of the long side; or, a plurality of second center magnets 2213 are arranged adjacently and in parallel along the direction of the short side; or, a portion of the second center magnets 2213 are arranged adjacently and in parallel along the direction of the long side, and another portion of the second center magnets 2213 are arranged at both ends of a portion of the second center magnets 2213 along the direction of the short side, or vice versa, which is not limited here.

[0133] In one embodiment, the third magnet 2223 protrudes from one end of the intermediate magnetic component 221 facing away from the magnetic guide yoke 21 and forms a protrusion 2214 on one side surface facing away from the second magnet 2222 . The diaphragm 31 is annular, and the inner periphery of the diaphragm 31 is fixed to the third magnet 2223 and arranged around the protrusion 2214 .

[0134] In this embodiment, if Figure 1 , Figure 4 and Figure 5 As shown, by setting the end of the intermediate magnetic component 221 facing away from the magnetic yoke 21 to protrude or be higher than the end face of the Halbach magnetic circuit 222 facing away from the magnetic yoke 21, the intermediate magnetic component 221 forms a protrusion 2214, and the diaphragm 31 is annular, so that the inner periphery of the diaphragm 31 is fixed to the periphery of the side of the Halbach magnetic circuit 222 facing away from the magnetic yoke 21, that is, the protrusion 2214 is arranged in the center of the diaphragm 31, that is, the center of the diaphragm 31 is provided with a through hole for the protrusion 2214 to pass through. The structure is connected, so that the Halbach magnetic circuit 222 can be used to fix and seal the diaphragm 31. At the same time, when the sound-emitting device 100 is applied to an electronic device, in order to reduce the Z-axis height of the electronic device, the protrusion 2214 of the central magnetic part 22 in the sound-emitting device 100 can be used to abut against the inner wall of the shell of the electronic device. There is no need to increase the front cavity space. The front sound cavity structure can be formed by utilizing the height difference between the protrusion 2214 of the central magnetic part 22 and the vibration system 3, which is not limited here.

[0135] Furthermore, the top surface of the diaphragm 31 facing away from the magnetic circuit system 2 is not higher than the top surface of the intermediate magnetic component 221 facing away from the magnetic guide yoke 21. In this way, the overall thickness of the product can be reduced.

[0136] In this embodiment, the second center magnet 2213 of the intermediate magnetic component 221 has a side surface facing away from the center magnetic conductive plate 2212 that protrudes from the side surface of the third magnet 2223 facing away from the second magnet 2222 to form a protrusion 2214, and the inner periphery of the diaphragm 31 is fixed to the periphery of the third magnet 2223 facing away from the second magnet 2222.

[0137] In one implementation, an avoidance structure is provided at the edge of the third magnet 2223. In this embodiment, the avoidance structure can be selected as at least one of an inclined surface, a fillet, a chamfer, and a step structure.

[0138] Optionally, the angle formed between the avoidance structure and the surface of the third magnet 2223 facing away from the second magnet 2222 is greater than 90° and less than 180°. In this embodiment, the range of the angle formed between the avoidance structure and the surface of the third magnet 2223 facing away from the second magnet 2222 can be further selected as 100° to 150°, which is not limited here. Optionally, the angle is 100°, 110°, 120°, 130°, 140°, 150°, etc., which is not limited here.

[0139] In the present embodiment, the avoidance structure surrounds the periphery of the third magnet 2223 on the side facing away from the second magnet 2222, that is, the avoidance structure is an integral annular inclined surface. Of course, in other embodiments, the avoidance structure includes multiple, multiple avoidance structures are arranged at intervals, and surround the periphery of the third magnet 2223 on the side facing away from the second magnet 2222. At this time, the two adjacent avoidance structures are not connected, and there is also a certain spacing. Alternatively, the avoidance structure includes multiple, adjacent avoidance structures are connected end to end to form a closed annular structure, and surround the periphery of the third magnet 2223 on the side facing away from the second magnet 2222. At this time, the adjacent avoidance structures in the multiple avoidance structures are adjacent and adjacent to form an annular structure. Optionally, the angles formed by the multiple avoidance structures and the surface of the third magnet 2223 on the side facing away from the second magnet 2222 can be the same, different, or at least partially the same, which is not limited here.

[0140] In one embodiment, the sound-generating device 100 also includes a shell 1, the edge magnetic portion 23 includes a stacked edge magnet 231 and an edge magnetic conductive plate 232, the edge magnet 231 is connected to the magnetic conductive yoke 21, one end of the shell 1 is connected to the edge magnetic conductive plate 232, and the other end of the shell 1 is connected to the outer periphery of the diaphragm 31.

[0141] In this embodiment, if Figures 2 to 4 As shown, the side magnetic conductive plate 232 can be optionally integrated with the housing 1. It can be understood 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.

[0142] In one embodiment, the diaphragm 31 is annular, the inner periphery of the diaphragm 31 is fixed to the third magnet 2223 , 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 .

[0143] In this embodiment, the diaphragm 31 includes an inner ring portion 311, a first folded ring 313 disposed around the inner ring portion 311, a straight portion 314 disposed around the first folded ring 313, a second folded ring 315 disposed around the straight portion 314, and a fixing portion 316 connected to the outer side of the second folded ring 315, the fixing portion 316 is connected to the housing 1, one end of the voice coil 32 is directly or indirectly connected to the straight portion 314, and the inner ring portion 311 is connected to the magnetic circuit system 2. In order to strengthen the structural strength of the central portion of the diaphragm 31, the vibration system 3 further includes a vibration plate, which is disposed on the straight portion 314 of the diaphragm 31.

[0144] Optionally, the first fold ring 313 and the second fold ring 315 are in a convex structure protruding upward or a concave structure concave downward, which is not limited here.

[0145] In 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 .

[0146] 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.

[0147] 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, one end of the centering support plate 34 is connected to the outer shell 1 and / or the edge magnetic portion 23, and the other end of the centering support plate 34 is connected to the connecting portion 332.

[0148] In this embodiment, if Figure 3 and Figure 4 As shown, the main body 331 of the skeleton 33 can be optionally an annular structure, that is, the main body 331 is arranged in an annular shape, and the main body 331 is arranged around the central magnetic part 22. Optionally, the main body 331 is arranged in a rectangular ring shape, and the connecting part 332 includes a plurality of connecting parts 332, and the plurality of connecting parts 332 are respectively arranged at the four corners of the main body 331.

[0149] It can be understood that by providing the centering support plate 34, the lead of the voice coil 32 can be connected to the external circuit by the centering support plate 34, and the voice coil 32 can be prevented from swinging or polarizing during vibration.

[0150] 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.

[0151] 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.

[0152] 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 .

[0153] In one embodiment, the centering support piece 34 includes an outer fixing portion 341 , an inner fixing portion 342 , and an elastic arm portion 343 connecting the outer fixing portion 341 and the inner fixing portion 342 . The outer fixing portion 341 is connected to the outer shell 1 and / or the edge magnetic portion 23 , and the inner fixing portion 342 is connected to the connecting portion 332 .

[0154] In this embodiment, 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. Figure 2 and Figure 3 As shown, the outer fixing portion 341, the elastic arm 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. In order to ensure the deformation ability of the centering support 34, the elastic arm portion 343 can be optionally provided with at least one bend.

[0155] It can be understood that in order to facilitate the lead routing connection of the voice coil 32 and smoothly connect and conduct with the external circuit, the inner fixing portion 342 is provided with an inner pad, and the lead of the voice coil 32 extends along the connecting portion 332 to the inner pad.

[0156] In one embodiment, if Figure 2 and Figure 3 As shown, the outer fixing portion 341, the elastic arm 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.

[0157] In one embodiment, if Figure 3 As shown, the vibration system 3 also includes a skeleton 33, the skeleton 33 includes 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 includes an external fixing portion 341, an internal fixing portion 342 and an elastic arm 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.

[0158] In one embodiment, the diaphragm 31 includes an inner ring portion 311, a first folded ring 313 arranged around the inner ring portion 311, a straight portion 314 arranged around the first folded ring 313, a second folded ring 315 arranged around the straight portion 314, and a fixed portion 316 connected to the outer side of the second folded ring 315, the fixed portion 316 is connected to the outer shell 1, the straight portion 314 is connected to the skeleton 33, the inner ring portion 311 is formed with an inner ring hole 312, the inner ring portion 311 is connected to the third magnet 2223, and at least a portion of the intermediate magnetic component 221 is protruded from the inner ring hole 312.

[0159] 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 .

[0160] 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.

[0161] It should be noted that the diaphragm 31 and the voice coil 32 may be directly connected, for example, one end of the voice coil 32 is connected to the straight portion 314 of the diaphragm 31, and the other end of the voice coil 32 is suspended in the magnetic gap 24. Of course, the diaphragm 31 and the voice coil 32 may also be indirectly connected, for example, the diaphragm 31 is connected to the voice coil 32 through the skeleton 33, that is, the straight portion 314 of the diaphragm 31 is connected to the main body 331 of the skeleton 33, and the side of the main body 331 facing away from the straight portion 314 is connected to one end of the voice coil 32, and the other end of the voice coil 32 is suspended in the magnetic gap 24, which is not limited here.

[0162] In this embodiment, the inner ring portion 311 of the diaphragm 31 can be a sealed structure, that is, the inner ring portion 311 is in the shape of a straight plate, and the inner ring portion 311 is connected and fitted to the side of the third magnet 2223 of the Halbach magnetic circuit 222 facing away from the second magnet 2222 and the side of the second center magnet 2213 of the intermediate magnetic assembly 221 facing away from the center magnetic conductive plate 2212.

[0163] Of course, the diaphragm 31 may also be arranged in an annular shape, in which case an inner ring hole 312 is formed in the center of the inner ring portion 311, and the inner ring portion 311 is connected to the edge of the third magnet 2223, so that the protrusion 2214 of the intermediate magnetic component 221 is arranged corresponding to the inner ring hole 312. In this embodiment, the protrusion 2214 is convexly arranged on the inner ring hole 312, that is, the inner ring portion 311 of the diaphragm 31 is connected to the edge of the third magnet 2223.

[0164] In one embodiment, if Figure 3 and Figure 4 As shown, the diaphragm 31 further includes a reinforcement portion 318, which is disposed on the straight portion 314. 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 avoiding the diaphragm 31 from tearing when the voice coil 32 drives the diaphragm 31 to vibrate. Optionally, the reinforcement portion 318 is disposed between the straight portion 314 and the frame 33.

[0165] In one embodiment, if Figure 3 and Figure 4 As shown, one end of the fixing portion 316 away from the second fold ring 315 is bent and extended toward the housing 1 to form a bent portion 317, and the bent portion 317 is connected to the outer wall of the housing 1. It can be understood that by bending downward on the outer side of the fixing portion 316 to form the bent portion 317, the bent portion 317 is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1, improving the connection stability and sealing performance.

[0166] The present invention further 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 described one by one here.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] It is understandable that the electronic device can be headphones, mobile phones, MP3, MP4, computers, tablet computers, smart wearable devices, etc., which are 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 single body.

[0171] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, 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, characterized in that: The sound-generating device comprises: A vibration system, the vibration system comprising a diaphragm and a voice coil connected to the diaphragm; A magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the side magnetic portion being located outside the central magnetic portion and spaced apart from the central magnetic portion to form a magnetic gap, one end of the voice coil being suspended in the magnetic gap, the central magnetic portion comprising an intermediate magnetic component and a Halbach magnetic circuit arranged around the intermediate magnetic component, the Halbach magnetic circuit comprising a first magnet, a second magnet and a third magnet sequentially stacked on the magnetic yoke; The first magnet and the third magnet are both magnetized along a vibration direction perpendicular to the vibration system, and the magnetization direction of the first magnet is opposite to the magnetization direction of the third magnet, and the second magnet is magnetized along the vibration direction of the vibration system.

2. The sound-generating device according to claim 1, characterized in that: The magnetic pole of the first magnet close to the middle magnetic component is the same as the magnetic pole of the third magnet close to the magnetic gap, and the magnetic pole of the first magnet close to the middle magnetic component is the same as the magnetic pole of the second magnet close to the third magnet; And / or, the magnetization direction of the first magnet is along the direction from the magnetic gap to the intermediate magnetic component, and the magnetization direction of the third magnet is along the direction from the intermediate magnetic component to the magnetic gap; or, the magnetization direction of the first magnet is along the direction from the intermediate magnetic component to the magnetic gap, and the magnetization direction of the third magnet is along the direction from the magnetic gap to the intermediate magnetic component.

3. The sound generating device according to claim 1, characterized in that: The projection of the voice coil along the vibration direction perpendicular to the vibration system is located within the projection range of the third magnet along the vibration direction perpendicular to the vibration system; And / or, the thickness of the third magnet along the vibration direction of the vibration system is greater than or equal to the sum of the thicknesses of the first magnet and the second magnet along the vibration direction of the vibration system; And / or, along the vibration direction of the vibration system, the first magnet and the second magnet are both located below an end of the voice coil away from the diaphragm.

4. The sound generating device according to claim 1, characterized in that: The first magnet forms a closed integral ring structure; or, the first magnet includes a plurality of first magnets, and adjacent first magnets are connected end to end to form a closed ring structure; or, the first magnet includes a plurality of first magnets, and the plurality of first magnets are arranged around the outer periphery of the intermediate magnetic component, and there are gaps between adjacent first magnets; And / or, 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 a plurality of second magnets are arranged around the outer periphery of the intermediate magnetic component, and there are gaps between adjacent second magnets; And / or, the third magnet forms a closed integrated ring structure; or, the third magnet includes a plurality of adjacent third magnets connected end to end to form a closed ring structure; or, the third magnet includes a plurality of third magnets, a plurality of third magnets are arranged around the outer circumference of the intermediate magnetic component, and there are gaps between adjacent third magnets.

5. The sound generating device according to claim 1, characterized in that: The intermediate magnetic assembly includes a first central magnet, a central magnetic plate and a second central magnet which are sequentially stacked on the magnetic yoke; Wherein, both the first central magnet and the second central magnet are 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.

6. The sound generating device according to claim 5, characterized in that: The edge magnet part includes a stacked edge magnet and an edge magnetic conductive plate, and the edge magnet is connected to the magnetic conductive yoke; Among them, the second magnet, the first central magnet, the second central magnet and the side magnet are all magnetized along the vibration direction of the vibration system, the magnetization direction of the second magnet is the same as the magnetization direction of the first central magnet, and the magnetization direction of the second central magnet is the same as the magnetization direction of the side magnet.

7. The sound generating device according to claim 6, characterized in that: The polarity of the first magnet near the middle magnetic assembly is the same as the polarity of the first center magnet near the center magnetic plate, and the polarity of the first magnet near the middle magnetic assembly is the same as the polarity of the side magnet near the magnetic yoke. And / or, the thickness of the first central magnet along the vibration direction of the vibration system is greater than or equal to the sum of the thicknesses of the first magnet and the second magnet along the vibration direction of the vibration system; And / or, the projection of the central magnetic conductive plate along the vibration direction perpendicular to the vibration system is located within the projection range of the third magnet along the vibration direction perpendicular to the vibration system.

8. The sound generating device according to claim 5, characterized in that: The first central magnet is an integral plate-shaped structure; or, the first central magnet includes a plurality of first central magnets, the plurality of first central magnets are adjacent to and laid flat between the central magnetic conductive plate and the magnetic conductive yoke, the plurality of first central magnets are magnetized along the vibration direction of the vibration system, and the magnetization directions of the plurality of first central magnets are the same; 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; And / or, the second central magnet is an integral plate-shaped structure; or, the second central magnet includes a plurality of second central magnets, the plurality of second central magnets are adjacent to and laid flat on a side of the central magnetic conductive plate facing away from the first central magnet, the plurality of second central magnets are magnetized along the vibration direction of the vibration system, and the plurality of second central magnets have the same magnetization direction.

9. The sound generating device according to claim 1, characterized in that: One end of the intermediate magnetic component facing away from the magnetic yoke protrudes from a surface of the third magnet facing away from the second magnet to form a protrusion; the diaphragm is annular; the inner periphery of the diaphragm is fixed to the third magnet and is arranged around the protrusion; And / or, the top surface of the diaphragm facing away from the magnetic circuit system is not higher than the top surface of the intermediate magnetic component facing away from the magnetic yoke.

10. The sound generating device according to claim 1, characterized in that: The edge of the third magnet is provided with an avoidance structure, and the avoidance structure is at least one of an inclined surface, a fillet, a chamfer, and a step structure; The avoidance structure is disposed around the periphery of the third magnet facing away from the second magnet; or, the avoidance structure includes a plurality of avoidance structures, the plurality of avoidance structures are arranged at intervals, and are disposed around the periphery of the third magnet facing away from the second magnet; or, the avoidance structure includes a plurality of adjacent avoidance structures connected end to end to form a closed ring structure, and are disposed around the periphery of the third magnet facing away from the second magnet; And / or, an angle formed by the avoidance structure and a surface of the third magnet facing away from the second magnet is greater than 90° and less than 180°.

11. The sound generating device according to any one of claims 1 to 10, characterized in that: The sound-generating device also includes a shell, the edge magnetic part 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 outer periphery of the diaphragm.

12. The sound generating device according to claim 11, characterized in that: The side magnetic conductive plate and the shell are an integrally formed structure; And / or, the diaphragm is annular, the inner periphery of the diaphragm is fixed to the third magnet, 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.

13. The sound generating device according to claim 11, characterized in that: The vibration system further includes a frame, the frame including a main body and a connecting portion connected to the periphery of the main body, the main body being arranged between the diaphragm and the voice coil; The vibration system also includes a centering support plate, which includes an external fixing portion, an internal fixing portion, and an elastic arm 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.

14. The sound generating device according to claim 13, characterized in that: 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 third magnet, and at least a portion of the intermediate magnetic component is protruded from the inner ring hole.

15. The sound generating device according to claim 14, characterized in that: The inner ring portion, the first fold ring, the straight portion, the second fold ring and the fixing portion are an integrally formed structure; 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; And / or, the diaphragm further comprises a reinforcement portion, wherein the reinforcement portion is disposed between the straight portion and the frame; 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.

16. An electronic device, characterized in that: The electronic device comprises the sound emitting device according to any one of claims 1 to 15.

Images