Sound production device and electronic equipment

Abstract

The invention is suitable for the technical field of electro-acoustic conversion, and particularly relates to a sound production device and electronic equipment, the sound production device comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system comprises four side magnetic parts, and each side magnetic part comprises a side magnet and a side magnetic conductive plate stacked on the side magnet; a concave connecting part on one side of the magnetic conductive yoke is connected between the two adjacent magnetic conductive plates, is provided with a wire outlet space, and is positioned on the circumferential outer side of the side magnet; the vibrating system comprises a vibrating diaphragm assembly and a voice coil which are connected, the vibrating diaphragm assembly is connected to the shell, the other end of the voice coil is opposite to the magnetic gap, a wire outlet gap is formed between every two adjacent side magnets, and a lead of the voice coil is led out through the wire outlet gap and the wire outlet space in sequence. According to the sound production device, the magnetic induction intensity of the magnetic circuit system can be improved, the sound production sensitivity of the sound production device is improved, and meanwhile the fracture risk of the voice coil lead can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application is suitable for the technical field of electro-acoustic conversion, and particularly relates to a sound production device and electronic equipment. BACKGROUND

[0002] In recent years, with the development of electronic equipment, the requirement for thinness of electronic products is higher and higher, and the requirement for the size of the sound production device is also higher. Under the condition of the structure and size limitation of the sound production device, how to improve the sound production sensitivity and reliability margin of the sound production device becomes a key. In the related technology, in order to facilitate the connection of the centering support sheet and the voice coil, a notch part is usually arranged at the four corner positions of the side magnetic part to facilitate the centering support sheet to extend to the inside of the side magnetic part, but the above design reduces the magnetic energy product of the magnetic circuit system and reduces the sound production sensitivity of the product. In order to improve the sensitivity of the sound production device, a magnet is usually arranged at the corner of the voice coil, but the increased magnet squeezes the space of the corner, which further increases the risk of lead breakage of the sound production device, reduces the structural reliability, and further reduces the product competitiveness. Therefore, in view of the above problems, the present application is proposed. SUMMARY

[0003] The present application aims to provide a sound production device and electronic equipment to at least partially solve the above technical problems.

[0004] The first aspect of the present application provides a sound production device, comprising:

[0005] a shell;

[0006] a magnetic circuit system, comprising a magnetic yoke, a center magnetic part and a side magnetic part arranged on the magnetic yoke, the magnetic yoke being connected to the shell, the side magnetic part being annularly arranged on the center magnetic part and forming a magnetic gap with the center magnetic part; the number of the side magnetic parts is four, and each of the side magnetic parts comprises a side magnetic body and a side magnetic guide plate stacked on the side magnetic body, a connecting part recessed to one side of the magnetic yoke is connected between two adjacent side magnetic guide plates, the connecting part has a lead-out space, and the connecting part is located on the circumferential outer side of the side magnetic body;

[0007] a vibration system, comprising a diaphragm assembly and a voice coil connected in series, the diaphragm assembly being connected to the shell, one end of the voice coil being connected to the diaphragm assembly, the other end of the voice coil being opposite to the magnetic gap, a lead-out gap being arranged between two adjacent side magnetic bodies, and the lead of the voice coil being led out through the lead-out gap and the lead-out space in sequence.

[0008] The sound production device provided by the present application can further have the following additional technical features:

[0009] In one specific embodiment of the present application, the connecting part is arranged in a U shape, or the connecting part is arranged in a V shape.

[0010] And / or, the maximum amplitude of the vibration system is Xmax, and the recess depth of the outgoing line space is Xmax+0.2mm.

[0011] In one specific embodiment of the present application, the shell is a metal shell, and the edge magnetic conductive plate is in an integrated structure with the shell; or, at least part of the shell is a plastic material piece, and the edge magnetic conductive plate is integrally injection molded with the shell.

[0012] And / or, the edge magnetic conductive plate and the connecting part are formed in an integrated stamping structure.

[0013] In one specific embodiment of the present application, the edge magnetic part has a first connecting edge and a second connecting edge connected head to tail, the edge magnetic part includes a first edge magnet corresponding to the first connecting edge and a second edge magnet corresponding to the second connecting edge, and the ends of the first edge magnet and the ends of the corresponding second edge magnet cooperatively form a avoiding gap avoiding the connecting part.

[0014] In one specific embodiment of the present application, the vibration system further includes a centering support piece, the centering support piece is arranged along the circumference of the voice coil and located outside the edge magnetic part, the centering support piece includes an outer fixed part, a cantilever part and an inner fixed part, the outer fixed part is connected with the shell, the inner fixed part is provided with a pad part, and the lead wire of the voice coil is sequentially connected with the pad part through the outgoing line gap and the outgoing line space.

[0015] In one specific embodiment of the present application, the vibration system further includes a skeleton, the skeleton includes a body part and a leg part connected with the body part, one end of the leg part away from the body part extends along the vibration direction of the vibration system, one side of the body part is connected with the diaphragm assembly, the other side of the body part is connected with the voice coil, and the one end of the leg part away from the body part is connected with the inner fixed part.

[0016] In one specific embodiment of the present application, the body part is formed in a square structure, and the leg part is four and respectively located at the four corner positions of the body part.

[0017] In one specific embodiment of the present application, along the vibration direction of the vibration system, part of the cantilever part and the shell oppositely form a first cantilever, and the shell is provided with an avoiding groove oppositely arranged with the first cantilever.

[0018] In one specific embodiment of the present application, the first cantilever further includes a transition part, and along the direction from the fixed part to the cantilever part, the width of at least part of the transition part gradually decreases.

[0019] The second aspect of the present application also provides an electronic device comprising the sound production device according to any one of the above.

[0020] The sound production device provided by the present application sets the shell, the magnetic circuit system and the vibration system, and sets the voice coil of the vibration system in the magnetic gap of the magnetic force system, so that the magnetic field of the magnetic gap can be provided for the voice coil, so that the energized voice coil can vibrate in the magnetic gap, and further drive the diaphragm assembly to vibrate and produce sound. By setting the connecting part between the adjacent side magnetic conductive plates, the magnetic field strength of the corner of the voice coil can be improved without changing the volume of the sound production device, the BL value of the sound production device is improved, and the sensitivity of the sound production device is improved. In addition, the above setting can also define a specific space between the two adjacent side magnets through the connecting part, so as to avoid the collision of the two adjacent side magnets when falling, and further avoid the extrusion of the two adjacent side magnets to the voice coil lead, thereby reducing the risk of breaking the voice coil lead, thereby improving the reliability margin of the sound production device and improving the competitiveness of the sound production device. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 It is a structure exploded view of the sound production device in the embodiment of the present application.

[0023] Figures 2-4 It is a structure schematic view of the shell, the side magnetic conductive plate and the connecting part in the embodiment of the present application.

[0024] Figure 5 It is a cross-sectional schematic view of part of the structure of the sound production device in the embodiment of the present application.

[0025] Figure 6 It is a schematic view of part of the structure of the sound production device in the embodiment of the present application.

[0026] Figure 7 It is a connection schematic view of the voice coil and the skeleton in the embodiment of the present application.

[0027] Figure 8 It is a structure schematic view of the skeleton in the embodiment of the present application.

[0028] Figure 9 It is a structure schematic view of the centering sheet in the embodiment of the present application.

[0029] Explanation of reference signs:

[0030] 100-sound production device

[0031] 10 - housing, 11 - relief groove;

[0032] 20 - vibration system, 11 - diaphragm assembly, 111 - diaphragm, 112 - vibrating plate, 12 - skeleton, 121 - main body portion, 122 - leg portion, 123 - boss, 13 - voice coil, 14 - vent hole;

[0033] 30 - magnetic circuit system, 31 - magnetic yoke, 32 - center magnetic portion, 33 - center magnet, 34 - center magnetic plate, 35 - edge magnetic portion, 36 - edge magnet, 361 - first edge magnet, 362 - second edge magnet, 37 - edge magnetic plate, 38 - connecting portion;

[0034] 40 - centering bracket, 41 - outer fixing portion, 42 - cantilever portion, 43 - inner fixing portion, 44 - pad portion, 45 - transition portion. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0036] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0037] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0038] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms can be interpreted, for example, in the context of the figures, in accordance with an embodiment of the present application. For example, if an element or feature is depicted as being "below" or "beneath" another element or feature, it can be interpreted that the element or feature is located at a different spatial attitude than the other element or feature, in use or operation. Such spatially relative terms can include different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0039] The embodiment of the present application provides a sound generating device 100 and an electronic device comprising the sound generating device 100, which can effectively improve the reliability margin of the sound generating device 100 and the service life of the sound generating device 100 under the condition that the structural size is limited.

[0040] With reference to Figures 1-9The first aspect of the present application provides a sound production device 100, comprising a shell 10, a magnetic circuit system 30 and a vibration system 20, wherein the magnetic circuit system 30 comprises a magnetic yoke 31, a center magnetic part 32 and a side magnetic part 35 arranged on the magnetic yoke 31, the magnetic yoke 31 is connected to the shell 10, the side magnetic part 35 is annularly arranged on the center magnetic part 32 and forms a magnetic gap with the center magnetic part 32; the number of the side magnetic part 35 is four, and each comprises a side magnetic body 36 and a side magnetic plate 37 stacked on the side magnetic body 36, and a connecting part 38 recessed to one side of the magnetic yoke 31 is connected between two adjacent side magnetic plates 37, the connecting part 38 has a wire outlet space, and the connecting part 38 is located on the circumferential outer side of the side magnetic body 36; the vibration system 20 comprises a diaphragm assembly 11 and a voice coil 13 connected to each other, the diaphragm assembly 11 is connected to the shell 10, one end of the voice coil 13 is connected to the diaphragm assembly 11, and the other end of the voice coil 13 is opposite to the magnetic gap, there is a wire outlet gap between two adjacent side magnetic bodies 36, and the lead wire of the voice coil 13 is led out through the wire outlet gap and the wire outlet space in turn.

[0041] Specifically, the shell 10 is formed as a hollow frame structure, and has a first side and a second side arranged oppositely along the axial direction, wherein the vibration system 20 is connected to the first side, and the magnetic circuit system 30 is connected to the second side.

[0042] In the vibration system 20, the diaphragm assembly 11 comprises a diaphragm 111 with a folded ring part and a vibration plate 112 connected to the center of the diaphragm 111, and the outer periphery of the diaphragm 111 is connected to the first side of the shell 10; the voice coil 13 is connected to the face of the diaphragm assembly 11 facing the magnetic circuit system 30.

[0043] In the magnetic circuit system 30, the magnetic yoke 31 is connected to the shell 10, and the center magnetic part 32 and the side magnetic part 35 are arranged on the side of the magnetic yoke 31 facing the vibration system 20, wherein the center magnetic part 32 is arranged at the center of the magnetic yoke 31, the side magnetic part 35 is annularly arranged on the center magnetic part 32 and forms a magnetic gap opposite to the end of the voice coil 13, and the magnetic gap is used to provide a magnetic field for the voice coil 13 to drive the voice coil 13 to vibrate, thereby driving the diaphragm assembly 11 to vibrate and produce sound.

[0044] The center magnetic part 32 comprises a center magnetic body 33 arranged at the center of the magnetic yoke 31 and a center magnetic plate 34 stacked on the center magnetic body 33, and the center magnetic body 33 and the center magnetic plate 34 are both arranged in a strip shape and have substantially the same outer contour.

[0045] The side magnetic part 35 includes four side magnets 36 arranged on the magnetic yoke 31 and four side magnetic plates 37 arranged on the side magnets 36. The four side magnets 36 are arranged in a ring shape with the heads opposite to each other. Along the radial direction of the side magnetic part 35, a wire outlet gap and a mounting gap are formed between two adjacent side magnets 36, and the width of the wire outlet gap is smaller than the width of the mounting gap. A connecting part 38 recessed to one side of the magnetic yoke 31 is arranged between two adjacent side magnetic plates 37 and arranged in the mounting gap and corresponding to the side magnets 36 on both sides. The wire outlet space formed in the connecting part 38 due to the recess is in communication with the wire outlet gap. In this way, the lead of the voice coil 13 can be led out through the wire outlet gap and the wire outlet space. In the above arrangement, the wire outlet gap with a reduced width is formed on the side of the adjacent side magnets 36 close to the magnetic gap, so that the volume of the side magnets 36 can be increased without affecting the wire outlet, and the magnetic field strength of the corner of the voice coil 13 is improved, the BL value of the sound generating device 100 is improved, and the sensitivity of the sound generating device 100 is improved. At the same time, by arranging the connecting part 38 in the mounting gap, on the one hand, the magnetic conductivity at the gap position between the two side magnets 36 is improved, the magnetic field strength of the corner of the voice coil 13 is improved, the BL value of the sound generating device 100 is improved, and the sensitivity of the sound generating device 100 is improved; on the other hand, the connecting part 38 can define a specific space between the two adjacent side magnets 36, so as to avoid collision between the two adjacent side magnets 36 when falling, and to avoid the extrusion of the lead of the voice coil 13 by the two adjacent side magnets 36, thereby reducing the risk of breakage of the lead of the voice coil 13, improving the reliability margin of the sound generating device 100, and improving the competitiveness of the sound generating device 100.

[0046] The sound generating device 100 provided by the embodiment of the present application can provide a magnetic field for the voice coil 13 by arranging the shell 10, the magnetic circuit system 30 and the vibration system 20 and arranging the voice coil 13 of the vibration system 20 relative to the magnetic gap of the magnetic system, so that the voice coil 13 can vibrate in the magnetic gap when energized, and drive the diaphragm assembly 11 to vibrate and generate sound. By arranging the connecting part 38 between the two adjacent side magnetic plates 37, the magnetic field strength of the corner of the voice coil 13 can be improved without changing the volume of the sound generating device 100, the BL value of the sound generating device 100 is improved, and the sensitivity of the sound generating device 100 is improved. The arrangement can also define a specific space between the two adjacent side magnets 36 by the connecting part 38, so as to avoid collision between the two adjacent side magnets 36 when falling, and to avoid the extrusion of the lead of the voice coil 13 by the two adjacent side magnets 36, thereby reducing the risk of breakage of the lead of the voice coil 13, improving the reliability margin of the sound generating device 100, and improving the competitiveness of the sound generating device 100.

[0047] In some embodiments, the connecting part 38 is arranged in a U shape, or the connecting part 38 is arranged in a V shape.

[0048] Specifically, the connecting portion 38 can be formed in a U shape, so that the space in the U-shaped structure is formed as the wire outlet space, and the two side walls of the U-shaped space can abut against the two adjacent side magnets 36 respectively, so as to avoid the falling collision of the two adjacent side magnets 36, thereby improving the structural reliability at this position. Or the connecting portion 38 is formed in a V shape, so that the space in the V-shaped structure is formed as the wire outlet space.

[0049] In this embodiment, the connecting portion 38 has a simple and effective structure, and the improvement of the related art is small, thereby facilitating popularization and application.

[0050] In some embodiments, the maximum amplitude of the vibration system 20 is Xmax, and the recess depth of the wire outlet space is Xmax+0.2mm. In this way, not only the vibration of the voice coil 13 and its lead can be met, but also a certain space can be reserved, so that the lead and the connecting portion 38 can be prevented from colliding in the working process of the vibration system 20 to avoid noise.

[0051] In some embodiments, the shell 10 is a metal shell 10, and the side magnetic guide plate 37 and the shell 10 are in an integrated structure.

[0052] Specifically, the connecting portion 38 and the side magnetic guide plate 37 are in an integrated metal structure, so when the shell 10 is a metal shell 10, the connecting portion 38, the side magnetic guide plate 37 and the shell 10 can be formed in an integrated structure, so as to simplify the processing procedure of the shell 10 and the side magnetic guide plate 37, thereby effectively improving the processing efficiency.

[0053] In some embodiments, at least part of the shell 10 is a plastic material piece, and the side magnetic guide plate 37 and the shell 10 are injection molded in an integrated structure. In this way, the side magnetic guide plate 37 and the connecting portion 38 formed in an integrated structure can be embedded in the injection mold of the shell 10, and the shell 10 is injection molded in an integrated structure.

[0054] In some embodiments, the side magnetic guide plate 37 and the connecting portion 38 are formed in an integrated stamping structure. By setting the connecting portion 38 and the side magnetic guide plate 37 as an integrated stamping structure, the processing efficiency can be improved, thereby reducing the influence of structural improvement on the overall production efficiency.

[0055] In some embodiments, the side magnetic portion 35 has a first connecting edge and a second connecting edge connected end to end, the side magnetic portion 35 includes a first side magnet 361 corresponding to the first connecting edge and a second side magnet 362 corresponding to the second connecting edge, and the ends of the first side magnet 361 and the ends of the corresponding second side magnet 362 are matched to form a avoiding gap for avoiding the connecting portion 38.

[0056] Specifically, the shell 10 can be formed as a square structure, the length direction of which is the long axis and the width direction of which is the short axis. The first connecting side and the second connecting side of the edge magnetic part 35 correspond to the long axis and the short axis of the shell 10 respectively. The edge magnetic part 35 includes the first edge magnet 361 corresponding to the long axis and the second edge magnet 362 arranged corresponding to the short axis. The corners of the first edge magnet 361 and the second edge magnet 362 away from the magnetic gap are formed with avoiding notches, and the opposite ends of the first edge magnet 361 and the second edge magnet 362 form a wire outlet gap, and the avoiding notches combine to form a mounting gap capable of accommodating the connecting part 38.

[0057] The above arrangement of the present embodiment can not only maximize the volume of the edge magnet 36, but also reserve mounting space for the connecting part 38, and then the connecting part 38 can be used to avoid the compression of the adjacent two edge magnets 36 on the lead wire of the voice coil 13, thereby reducing the risk of breakage of the lead wire of the voice coil 13, thereby improving the reliability margin of the sound generating device 100 and improving the competitiveness of the sound generating device 100.

[0058] In some embodiments, the vibration system 20 further includes a centering sheet 40 arranged along the circumference of the voice coil 13 and located outside the edge magnetic part 35. The centering sheet 40 includes an outer fixed part 41, a cantilever part 42 and an inner fixed part 43. The outer fixed part 41 is connected with the shell 10, and the inner fixed part 43 is provided with a solder pad part 44. The lead wire of the voice coil 13 passes through the wire outlet gap and the wire outlet space in sequence and is electrically connected with the solder pad part 44. In this way, the voice coil 13 can be connected with an external power supply by using the centering sheet 40, and then the voice coil 13 is powered to vibrate and drive the diaphragm assembly 11 to vibrate and sound.

[0059] In some embodiments, the vibration system 20 further includes a skeleton 12. The skeleton 12 includes a body part and a leg part 122 connected with the body part. The leg part 122 extends away from the body part along the vibration direction of the vibration system 20. One side of the body part is connected with the diaphragm assembly 11, and the other side of the body part is connected with the voice coil 13. The end of the leg part 122 away from the body part is connected with the inner fixed part 43. In this way, the vibration system 20 can be connected with the centering sheet 40 by using the skeleton 12, so as to improve the vibration stability of the vibration system 20 and reduce the vibration deviation of the vibration system 20 by using the centering sheet 40.

[0060] In some embodiments, the body part is formed as a square structure, and the leg part 122 is four and is located at the four corners of the body part respectively.

[0061] Specifically, the shape of the main body 121 is substantially the same as that of the voice coil 13, the number of the leg portions 122 is the same as that of the centering fins 40, and each of the leg portions 122 corresponds to a position of a centering fin 40 and is arranged at a corner of the main body 121. In this way, the leg portions 122 can extend to the centering fins 40 in the vibration direction and be connected to the inner fixing portions 43 of the centering fins 40. Thus, the arrangement described above can improve the centering effect of the centering fins 40 and the running stability of the vibration system 20.

[0062] In some embodiments, the main body 121 is provided with bosses 123 spaced along the axial direction of the main body 121 on the side facing the voice coil 13. Adjacent two bosses 123 have a gap therebetween, and the bosses 123 extend away from the diaphragm assembly 11 relative to the main body 121. The voice coil 13 is connected to the bosses 123, and the top of the voice coil 13 and the gap together form the air hole 14. In this way, the air hole 14 can be used to communicate the inside and outside of the voice coil 13, and the heat generated inside the voice coil 13 due to energization can be conducted to the outside of the voice coil 13 through the air hole 14, which is conducive to conducting the heat to the outside of the sound production device 100, thereby improving the reliability of the sound production device 100 and prolonging the service life of the sound production device 100.

[0063] In some embodiments, along the vibration direction of the vibration system 20, part of the cantilever portion 42 is opposite to the housing 10 to form a first cantilever, and the housing 10 is provided with an avoiding groove 11 arranged opposite to the first cantilever. In this way, the extension length of the cantilever portion 42 can be effectively increased without changing the volume of the sound production device 100, thereby avoiding cracks or breakage of the cantilever portion 42 and prolonging the service life of the sound production device 100.

[0064] In some embodiments, the first cantilever further includes a transition portion 45, and at least part of the transition portion 45 gradually decreases in width along the direction from the fixing portion to the cantilever portion 42. In this way, the stress concentration phenomenon of the cantilever portion 42 can be reduced, the deformation capacity of the cantilever portion 42 is improved, the deformation amount of the cantilever portion 42 is effectively increased, cracks or breakage of the cantilever portion 42 are avoided, and the service life of the sound production device 100 is prolonged.

[0065] The second aspect of the present application also provides an electronic device including the sound production device 100 of any one of the above embodiments. The structure of the sound production device 100 is described with reference to the above embodiments. Since the electronic device in the present embodiment includes the sound production device 100 in all the above embodiments, it also has at least all the beneficial effects described above, which will not be repeated here.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound-generating device, characterized in that: include: case; A magnetic circuit system comprising a magnetic yoke and a central magnetic portion and a side magnetic portion disposed on the magnetic yoke, wherein the magnetic yoke is connected to the housing, and the side magnetic portion is annularly disposed on the central magnetic portion and forms a magnetic gap with the central magnetic portion; the number of the side magnetic portions is four, and each includes a side magnet and a side magnetic plate stacked on the side magnet, and a connecting portion recessed toward one side of the magnetic yoke is connected between two adjacent side magnetic plates, the connecting portion having a wire outlet space and located circumferentially outside the side magnet; A vibration system includes a diaphragm assembly and a voice coil connected to each other, the diaphragm assembly is connected to the shell, one end of the voice coil is connected to the diaphragm assembly, the other end of the voice coil is opposite to the magnetic gap, and there is a wire outlet gap between two adjacent side magnets. The lead of the voice coil is led out through the wire outlet gap and the wire outlet space in sequence.

2. The sound-generating device according to claim 1, wherein: The connecting portion is arranged in a U-shape, or the connecting portion is arranged in a V-shape; And / or, the maximum amplitude of the vibration system is Xmax, and the recessed depth of the wire outlet space is Xmax+0.2 mm.

3. The sound-generating device according to claim 1, characterized in that: The housing is a metal housing, and the side magnetic conductive plate and the housing are an integral structure; or at least a portion of the housing is a plastic material, and the side magnetic conductive plate and the housing are injection-molded as one piece; And / or, the edge magnetic conductive plate and the connecting portion are formed into an integral stamping structure.

4. The sound-generating device according to claim 1, wherein: The edge magnetic portion has a first connecting edge and a second connecting edge connected end to end, and the edge magnetic portion includes a first edge magnet corresponding to the first connecting edge and a second edge magnet corresponding to the second connecting edge, and the ends of the first edge magnet respectively cooperate with the corresponding ends of the second edge magnet to form an avoidance gap to avoid the connecting portion.

5. The sound-generating device according to claim 1, characterized in that: The vibration system also includes a centering support plate, which is arranged along the circumference of the voice coil and located on the outside of the edge magnet portion. The centering support plate includes an external fixing portion, a cantilever portion and an internal fixing portion. The external fixing portion is connected to the shell, and a soldering pad portion is provided on the internal fixing portion. The lead of the voice coil passes through the wire outlet gap and the wire outlet space in sequence and is electrically connected to the soldering pad portion.

6. The sound-generating device according to claim 5, characterized in that: The vibration system also includes a skeleton, which includes a main body and a support leg connected to the main body, wherein one end of the support leg away from the main body extends along the vibration direction of the vibration system, one side of the main body is connected to the diaphragm assembly, and the other side of the main body is connected to the voice coil, and the end of the support leg away from the main body is connected to the internal fixing part.

7. The sound-generating device according to claim 6, characterized in that: The main body is formed into a square structure, and the number of the supporting legs is four and they are respectively located at the four corners of the main body.

8. The sound-generating device according to claim 5, characterized in that: Along the vibration direction of the vibration system, part of the cantilever portion and the shell are opposite to form a first cantilever, and the shell is provided with an avoidance groove arranged opposite to the first cantilever.

9. The sound-generating device according to claim 8, characterized in that: The first cantilever further includes a transition portion, and along a direction from the fixing portion to the cantilever portion, a width of at least a portion of the transition portion gradually decreases.

10. An electronic device, characterized in that: The invention comprises the sound-generating device according to any one of claims 1 to 9.

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