Sound production device, sound production module and electronic equipment

Abstract

The application discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction. The magnetic circuit system of the sound production device is provided with a mounting hole penetrating through a magnetic yoke and a central magnetic part, and a conductive support is arranged in the mounting hole. The vibration system comprises a diaphragm assembly, a voice coil and a centering support sheet. The diaphragm assembly is of a ring structure. The centering support sheet comprises a main body part and a leg part. The main body part is connected to the top of the conductive support and is electrically connected to the solder pad of the conductive support. The inner side of the diaphragm assembly is fixed to the main body part. One end of the leg part is connected to the main body part, and the other end of the leg part is connected to the diaphragm assembly and is electrically connected to the lead wire of the voice coil. The sound production device is provided with a hollow magnetic circuit system and a conductive support. The centering support sheet is electrically connected to the voice coil and the conductive support. Therefore, the setting volume of the side magnetic part can be increased, the magnetic field strength can be improved, the product BL value can be increased, and the acoustic performance can be improved. In addition, the sound production device has low magnetic flux leakage and meets the use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic transducer technology, and in particular to a sound-generating device and a sound-generating module and electronic equipment using the sound-generating device. Background Art

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as smartphones and VR devices have gained widespread acceptance and adoption. Technicians in this field have also developed improvements to related supporting products, such as headphones, to meet the performance requirements of these electronic products and satisfy consumer demand for higher performance.

[0003] Sound generators are important electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As electronic product performance improves, the acoustic performance of these devices is also an inevitable trend. To achieve better acoustic performance, sound generators often require larger magnetic circuit systems with stronger magnetic field strength.

[0004] In related technologies, the sound-generating device usually adopts a centering support structure, and the centering support is set at the four corners of the sound-generating device or the short axis of the sound-generating device, occupying part of the space of the magnetic circuit system, resulting in the size of the side magnets of the magnetic circuit system being limited and unable to be increased, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound-generating device. Summary of the Invention

[0005] The main purpose of the present invention is to provide a sound-generating device, a sound-generating module and an electronic device, aiming to provide a sound-generating device that effectively increases the magnetic field strength of the magnetic circuit system. The sound-generating device effectively increases the magnetic field strength, increases the BL value, and thus improves the acoustic performance.

[0006] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0007] A magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and a central magnetic portion and an edge magnetic portion provided on the magnetic yoke, the edge magnetic portion being located outside the central magnetic portion and enclosing a magnetic gap with the central magnetic portion, the magnetic circuit system being provided with a mounting hole extending through the magnetic yoke and the central magnetic portion;

[0008] a conductive bracket, the conductive bracket being disposed in the mounting hole; and

[0009] A vibration system comprising a diaphragm assembly, a voice coil and a centering support plate. The diaphragm assembly is an annular structure. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended in the magnetic gap. The centering support plate comprises a main body and a leg portion. The main body is connected to the top of the conductive bracket and is electrically connected to the pad of the conductive bracket. The inner side of the diaphragm assembly is fixed to the main body, one end of the leg portion is connected to the main body, and the other end of the leg portion is connected to the diaphragm assembly and electrically connected to the lead of the voice coil.

[0010] In one embodiment, the leg portion includes a first leg and a second leg connected to each other, the first leg extending along the short axis direction of the main body portion and connected to the main body portion, and the second leg extending along the long axis direction of the main body portion and connected to the diaphragm assembly.

[0011] In one embodiment, the leg portion includes a plurality of the first legs and a plurality of the second legs, and the plurality of the first legs and the plurality of the second legs are alternately arranged.

[0012] In one embodiment, the voice coil is in a rectangular ring shape, comprising two long sides and two short sides connected end to end, and has two lead wires, which are respectively arranged on the two long sides or the short sides.

[0013] In one embodiment, the main body and the leg portion are an integrally formed structure;

[0014] And / or, the main body and the leg portions are located in the same plane;

[0015] And / or, the main body is provided with a first pad, and the leg portion is provided with a second pad at one end away from the main body, the first pad is electrically connected to the pad of the conductive bracket, and the second pad is electrically connected to the lead of the voice coil.

[0016] In one embodiment, the central magnetic portion is provided with a relief structure corresponding to the leg portion, and the relief structure is connected to the mounting hole;

[0017] The avoidance structure is a groove formed by the central magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through-hole structure penetrating the central magnetic part.

[0018] In one embodiment, the central magnetic portion includes a stacked central magnet and a central washer, the central magnet is sandwiched between the central washer and the magnetic yoke, and the mounting hole sequentially passes through the magnetic yoke, the central magnet, and the central washer;

[0019] The center magnet is recessed towards the direction away from the diaphragm assembly to form the avoiding structure; or, the center magnet is provided with a first recessed groove recessed towards the direction away from the diaphragm assembly, the center magnet is provided with a second recessed groove recessed towards the direction away from the diaphragm assembly, and the first recessed groove and the second recessed groove are communicated and jointly form the avoiding structure.

[0020] In an embodiment, part of the center magnet is recessed towards the direction away from the diaphragm assembly to form an avoiding area, one end of the avoiding area is communicated with the avoiding structure, the other end of the avoiding area extends towards the periphery of the center magnet, and the avoiding area is arranged corresponding to the lead wire of the voice coil;

[0021] And / or, the center magnet is arranged in a ring shape; or, the center magnet includes a plurality of center magnets, and the plurality of center magnets are arranged in a ring shape to form the mounting hole;

[0022] And / or, the center magnet is arranged in a ring shape; or, the center magnet includes a plurality of center magnets, and the plurality of center magnets are arranged in a ring shape to form the mounting hole.

[0023] In an embodiment, the conductive support includes:

[0024] a main body provided with a first welding surface and a second welding surface arranged in opposite directions; and

[0025] a pad piece embedded in the main body, the pad piece including a first pad portion and a second pad portion connected to each other, at least part of the first pad portion being exposed to the first welding surface, and at least part of the second pad portion being exposed to the second welding surface;

[0026] The first welding surface is connected to the main body portion, and the second welding surface is used to connect an external power supply.

[0027] In an embodiment, along the vibration direction of the vibration system, the first welding surface is higher than the side surface of the center magnet portion facing the diaphragm assembly;

[0028] And / or, the main body is provided with a recess on the side opposite to the first welding surface, and the bottom wall of the recess forms the second welding surface;

[0029] And / or, the magnetic yoke, the main body and the pad piece are integrally injection molded.

[0030] In an embodiment, the diaphragm assembly includes a vibration portion, a first folded ring portion arranged outside the vibration portion, and a second folded ring portion arranged inside the vibration portion, and the inner side of the second folded ring portion is connected to the main body portion.

[0031] The first folding ring portion, the vibration portion and the second folding ring portion are an integrally formed structure; or, the vibration portion is formed as a vibration plate, the material of the vibration plate is metal or fiber material, the inner side of the first folding ring portion is bonded to the outer periphery of the vibration plate, and the inner periphery of the vibration plate is bonded to the outer side of the second folding ring portion.

[0032] In one embodiment, a hollow hole is provided on the inner side of the second folding ring portion, and a portion of the centering support piece is exposed in the hollow hole;

[0033] And / or, along the vibration direction of the vibration system, the second folding ring portion protrudes and extends in a direction away from the magnetic circuit system, and the second folding ring portion is arranged opposite to the support leg portion.

[0034] In one embodiment, the outer periphery of the vibration portion forms a first step surface, and the inner periphery of the vibration portion forms a second step surface;

[0035] The inner side of the first folding ring portion extends perpendicularly to the vibration direction of the vibration system to form an inner fixing portion, and the outer side of the second folding ring portion extends perpendicularly to the vibration direction of the vibration system to form an outer fixing portion;

[0036] The inner fixing portion is overlapped on the first step surface and bonded to the first step surface, and the outer fixing portion is overlapped on the second step surface and bonded to the second step surface.

[0037] In one embodiment, a side of the inner fixing portion facing away from the first step surface is flush with the vibrating portion;

[0038] And / or, a side of the external fixing portion facing away from the second step surface is flush with the vibrating portion;

[0039] And / or, the second folding ring portion protrudes toward a side away from the magnetic circuit system, and the first folding ring portion protrudes toward a side close to the magnetic circuit system.

[0040] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge washer, and the edge magnet is sandwiched between the magnetic yoke and the edge washer;

[0041] The side magnets and the side washers both form a closed annular structure; or, there are multiple side magnets and multiple side washers, which are arranged in a one-to-one correspondence, and adjacent side magnets are connected end to end to form a closed annular structure.

[0042] In one embodiment, a pressing groove is further provided on the side of the magnetic yoke facing away from the diaphragm assembly, one end of the pressing groove is connected to the mounting hole, and the other end of the pressing groove extends toward the periphery of the magnetic yoke, and the pressing groove is used to avoid wiring.

[0043] The present invention further provides a sound module, comprising:

[0044] module housing;

[0045] The sound-generating device described above is disposed in the module housing; and

[0046] A flexible circuit board, one end of which is electrically connected to the conductive bracket of the sound-generating device, and the other end of which is used to connect to an external power supply.

[0047] The present invention also provides an electronic device, comprising the above-mentioned sound-generating device;

[0048] Alternatively, the electronic device includes the sound module described above.

[0049] The sound-generating device of the technical solution of the present invention is configured as a magnetic circuit system with 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 encloses the central magnetic part to form a magnetic gap, and the vibration system is configured as a diaphragm assembly, a voice coil and a centering support plate opposite to the magnetic circuit system, so that one end of the voice coil is connected to the diaphragm assembly and the other end of the voice coil is suspended in the magnetic gap, so that current is passed through the voice coil, so that the voice coil converts electrical energy into mechanical energy in the magnetic gap formed by the magnetic circuit system, so as to drive the voice coil to drive the diaphragm assembly to vibrate, thereby achieving sound generation; at the same time, by providing a mounting hole that passes through the magnetic yoke and the central magnetic part in the magnetic circuit system, and providing a conductive bracket in the mounting hole, so that one end of the centering support plate is electrically connected to the welding pad of the conductive bracket, and the other end of the centering support plate is connected to the diaphragm assembly and electrically connected to the lead of the voice coil, so that the conductive bracket can be used to achieve both the installation and fixation of the centering support plate and the passage of the voice coil. The connection with the external circuit is achieved through the centering support plate and the conductive bracket. At the same time, the centering support plate can effectively prevent the voice coil from swinging or polarizing, thereby improving the acoustic performance of the sound-generating device. By arranging a mounting hole at the central position of the central magnetic part of the magnetic circuit system where the magnetic field utilization rate is not high, both weight reduction and installation and fixation of the conductive bracket can be achieved. Moreover, since the centering support plate is arranged in the center of the diaphragm assembly and connected to the conductive bracket in the mounting hole arranged in the middle of the central magnetic part, the centering support plate will not occupy the setting space of the side magnetic part, thereby increasing the volume of the side magnetic part. In addition, since there is leakage magnetic field at the central position of the central magnetic part, the mounting hole needs to be formed by removing at least a part of the central magnet at the central position of the central magnetic part, thereby reducing the leakage magnetic field of the central magnet. When the sound-generating device is assembled in an electronic device, the influence of the central magnet in the sound-generating device on the performance of the electronic device due to leakage magnetic field can be reduced, thereby meeting the requirements of the electronic device for leakage magnetic field. Furthermore, by setting the centering support plate as a main body and a leg part, the main body is connected to the top of the conductive bracket and electrically connected to the soldering pad of the conductive bracket, and the inner side of the diaphragm assembly is fixed to the main body, one end of the leg part is connected to the main body, and the other end of the leg part is connected to the diaphragm assembly and electrically connected to the lead of the voice coil. In this way, the centering support plate not only has good deformation ability, but also can extend the leg part to connect and conduct with the lead of the voice coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0051] Figure 1A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention;

[0052] Figure 2 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention from another perspective;

[0053] Figure 3 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0054] Figure 4 A cross-sectional schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0055] Figure 5 for Figure 4 A magnified schematic diagram of point A in the middle;

[0056] Figure 6 A cross-sectional schematic diagram of another perspective of an embodiment of the sound-generating device provided by the present invention;

[0057] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle;

[0058] Figure 8 A schematic diagram of the structure of the connection between the vibrating part, the voice coil and the centering support in one embodiment of the present invention;

[0059] Figure 9 This is a schematic structural diagram of a center washer in one embodiment of the present invention;

[0060] Figure 10 This is a schematic structural diagram of the connection between the magnetic yoke and the conductive bracket in one embodiment of the present invention;

[0061] Figure 11 A cross-sectional schematic diagram of the connection between the magnetic yoke and the conductive bracket in one embodiment of the present invention;

[0062] Figure 12 This is a schematic structural diagram of a conductive bracket in one embodiment of the present invention;

[0063] Figure 13 is a schematic cross-sectional view of a conductive bracket according to an embodiment of the present invention;

[0064] Figure 14 is an exploded schematic diagram of a diaphragm assembly according to an embodiment of the present invention;

[0065] Figure 15 Schematic diagram of the structure of the centering support plate in one embodiment of the present invention.

[0066] Description of Figure Numbers:

[0067] 100. Sounding device; 1. Housing; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Positioning platform; 212. Pressing groove; 213. Avoidance gap; 22. Center magnetic part; 221. Center magnet; 222. Center washer; 223. Avoidance area; 224. Avoidance structure; 23. Side magnetic part; 231. Side magnet; 232. Side washer; 24. Magnetic gap; 25. Mounting hole; 3. Conductive bracket; 31. Main body; 311. First welding surface; 312. Second welding surface; 313. Groove; 314. Positioning groove; 315. First connecting part; 316. Second connecting part; 317. Avoidance space; 32. Solder pad ;321, first pad portion; 322, second pad portion; 4, vibration system; 41, diaphragm assembly; 411, vibration portion; 4111, first step surface; 4112, second step surface; 4113, convex portion; 412, first folding ring portion; 4121, inner fixing portion; 4122, fixing portion; 413, second folding ring portion; 4131, outer fixing portion; 4132, hollow hole; 42, voice coil; 421, long side; 422, short side; 43, centering support plate; 431, main body; 4311, first pad; 432, leg portion; 4321, first leg; 4322, second leg; 4323, second pad.

[0068] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0070] 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 various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0071] 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 an option in which both A and B are satisfied.

[0072] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not 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 such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0073] The present invention provides a sound-generating device 100. It is understandable that the sound-generating device 100 is applied to an electronic device, which may be a smart watch, a mobile phone, a speaker, a computer, a headset, or a television, etc., without limitation herein.

[0074] Please refer to Figures 1 to 15 As shown, in an embodiment of the present invention, the sound-generating device 100 includes a magnetic circuit system 2, a conductive bracket 3 and a vibration system 4, wherein the magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 provided on the magnetic yoke 21, the side magnetic portion 23 is located outside the central magnetic portion 22, and is enclosed with the central magnetic portion 22 to form a magnetic gap 24, the magnetic circuit system 2 is provided with a mounting hole 25 passing through the magnetic yoke 21 and the central magnetic portion 22, the conductive bracket 3 is provided in the mounting hole 25, the vibration system 4 includes a diaphragm assembly 41, a voice coil 42 and a centering The support piece 43 and the diaphragm assembly 41 are annular structures. One end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is suspended in the magnetic gap 24. The centering support piece 43 includes a main body 431 and a leg portion 432. The main body 431 is connected to the top of the conductive bracket 3 and is electrically connected to the pad of the conductive bracket 3. The inner side of the diaphragm assembly 41 is fixed to the main body 431, one end of the leg portion 432 is connected to the main body 431, and the other end of the leg portion 432 is connected to the diaphragm assembly 41 and is electrically connected to the lead of the voice coil 42.

[0075] In this embodiment, the sound-generating device 100 may be a sound-generating unit of a speaker, and the speaker may be a micro speaker. It should be noted that the magnetic circuit system 2 and the vibration system 4 of the sound-generating device 100 are arranged opposite to each other.

[0076] Optionally, the magnetic circuit system 2 is 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. In this embodiment, the vibration system 4 is optionally arranged in a square shape. It is understood that the periphery of the diaphragm assembly 41 of the vibration system 4 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 4 may be separately assembled on the module housing, etc., without limitation herein.

[0077] In order to better assemble the magnetic circuit system 2 and the vibration system 4 of the sound generating device 100. In one embodiment, as Figures 1 to 4 、 Figure 6 As shown, the sound-generating device 100 also includes a shell 1, a magnetic circuit system 2 is connected to one end of the shell 1, and a vibration system 4 is connected to the other end of the shell 1 and is arranged opposite to the magnetic circuit system 2, that is, the periphery of the diaphragm assembly 41 of the vibration system 4 is connected to the other end of the shell 1 and is arranged opposite to the magnetic circuit system 2.

[0078] 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 4, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 4. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The housing 1 in this embodiment can be optionally 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 4 are respectively connected to the two sides of the housing 1 and are arranged relative to each other, so that the magnetic circuit system 2, the housing 1 and the diaphragm assembly 41 of the vibration system 4 enclose to form a vibration cavity.

[0079] It is understood that the sound-generating device 100 is used in an electronic device, 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 4 of the sound-generating device 100 into an integral structure, thereby facilitating assembly and disassembly. Of course, the housing 1 of the sound-generating device 100 can also be configured as an integrally molded structure with the housing or box structure of the electronic device, which can effectively improve the structural strength and sealing performance.

[0080] In this embodiment, the housing 1 is used to house and fix the vibration system 4 and the magnetic circuit system 2, etc., so that the sound-generating 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-generating device 100 can also be a modular structure, in which case the vibration system 4 and the magnetic circuit system 2 of the sound unit are installed as multiple independent components on the modular housing 1, which is not limited here.

[0081] It is understood that by configuring the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the housing 1 via the periphery of the magnetic yoke 21; alternatively, the magnetic circuit system 2 can be connected to the housing 1 via the side magnetic portion 23, without limitation. In this embodiment, the side magnetic portion 23 is disposed outside the central magnetic portion 22 and encloses the central magnetic portion 22 to form a magnetic gap 24. This allows the diaphragm assembly 41 of the vibration system 4 to be connected to the end of the housing 1 away from the magnetic yoke 21 and opposite and spaced from the magnetic circuit system 2. Consequently, one end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is suspended within the magnetic gap 24. Current is then passed through the voice coil 42, causing the voice coil 42 to convert electrical energy into mechanical energy within the magnetic gap 24 formed by the magnetic circuit system 2, thereby driving the voice coil 42 to vibrate the diaphragm assembly 41, thereby producing sound.

[0082] To achieve electrical connection between the voice coil 42 and the external circuit, the sound-generating device 100 in the related art typically employs a centering support 43 structure, with both ends of the centering support 43 electrically connected to the voice coil 42 leads and the external circuit, respectively. In the related art, the centering support 43 is typically positioned at the four corners of the sound-generating device 100 or along the short axis of the sound-generating device 100. Specifically, a clearance is provided at the four corners or along the short axis of the magnetic circuit system 2 to provide installation space or a location for the centering support 43. This centering support 43 occupies a portion of the space in the magnetic circuit system 2, limiting the size of the side magnets in the magnetic circuit system 2 from being increased. This results in a low magnetic field strength in the magnetic circuit system 2, lowering the BL value and thus affecting the acoustic performance of the sound-generating device 100.

[0083] In this embodiment, a mounting hole 25 is provided in the magnetic circuit system 2, which passes through the magnetic yoke 21 and the central magnetic portion 22, and a conductive bracket 3 is provided in the mounting hole 25. Thus, one end of the centering support 43 is electrically connected to the pad of the conductive bracket 3, and the other end of the centering support 43 is connected to the diaphragm assembly 41 and is electrically connected to the lead of the voice coil 42. In this way, an external current is introduced into the voice coil 42 through the conductive bracket 3 and the centering support 43. At the same time, the centering support 43 is used to center the vibration of the voice coil 42, thereby preventing the voice coil 42 from swinging or polarizing during the vibration process, thereby improving the sound effect and acoustic performance of the sound-generating device 100.

[0084] It should be noted that the magnetic field utilization rate at the central position of the central magnetic part 22 of the magnetic circuit system 2 is low. By setting a mounting hole 25 on the magnetic circuit system 2, for example, a mounting hole 25 can be set at the central position of the central magnetic part 22 of the magnetic circuit system 2 where the magnetic field utilization rate is not high. Under the premise of having little impact on the magnetic field strength of the magnetic circuit system 2, both weight reduction and installation and fixation of the conductive bracket 3 can be achieved; moreover, since the centering support piece 43 is set in the center of the diaphragm assembly 41 and is connected to the conductive bracket 3 in the mounting hole 25 set in the middle of the central magnetic part 22, the centering support piece 43 will not occupy the setting space of the side magnetic part 23, thereby increasing the volume of the side magnetic part 23, improving the magnetic field strength of the magnetic circuit system 2, and then improving the BL value, thereby improving the acoustic performance of the sound-generating device 100. In addition, due to the phenomenon of magnetic leakage in the central position of the central magnetic part 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 in the central position of the central magnetic part 22, thereby reducing the amount of magnetic leakage of the central magnet 221. When the sound-emitting device 100 is assembled in an electronic device, the influence of the magnetic leakage of the central magnet 221 in the sound-emitting device 100 on the performance of the electronic device can be reduced, thereby meeting the requirements of the electronic device for magnetic leakage.

[0085] Optionally, the mounting hole 25 can be a polygonal hole or a special-shaped hole such as a circular hole, an elliptical hole, a square hole, or a triangular hole, and the specific selection and setting is based on actual needs and is not limited here. In this embodiment, a through-hole structure is formed in the center of the central magnetic portion 22, and a third through-hole is also formed in the center of the magnetic yoke 21 corresponding to the through-hole structure of the central magnetic portion 22. In this case, the through-hole structure of the central magnetic portion 22 is connected to the third through-hole of the magnetic yoke 21 to form the mounting hole 25.

[0086] In this embodiment, the diaphragm assembly 41 can be annular in structure. As will be appreciated, the outer side of the diaphragm assembly 41 is connected to the housing 1, while the inner side of the diaphragm assembly 41 is connected to the conductive support 3. This allows the diaphragm assembly 41 to be fixed to the housing 1 and the conductive support 3, achieving a sealed connection. Furthermore, the diaphragm assembly 41 is positioned relative to the magnetic circuit system 2, forming a vibration space.

[0087] In one embodiment, the centering support plate 43 includes a main body 431 and a leg portion 432. The main body 431 is connected to the top of the conductive bracket 3 and is electrically connected to the solder pad of the conductive bracket 3. The inner side of the diaphragm assembly 41 is fixed to the main body 431. One end of the leg portion 432 is connected to the main body 431, and the other end of the leg portion 432 is connected to the diaphragm assembly 41 and is electrically connected to the lead of the voice coil 42.

[0088] In this embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 8 、 Figures 10 to 15 As shown, the main body 431 of the centering sheet 43 is fixed to the end of the conductive bracket 3 away from the magnetic yoke 21. Alternatively, the main body 431 of the centering sheet 43 is located between the inner side of the conductive bracket 3 and the second folded ring portion 413 of the diaphragm assembly 41.

[0089] The sound-generating device 100 of the present invention is configured 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 forms a magnetic gap 24 with the central magnetic portion 22. The vibration system 4 is configured as a diaphragm assembly 41, a voice coil 42 and a centering support 43 opposite to the magnetic circuit system 2, so that one end of the voice coil 42 is connected to the diaphragm assembly 41 and the other end of the voice coil 42 is suspended in the magnetic gap 24. In this way, current is passed through the voice coil 42, so that the voice coil 42 is magnetically The electrical energy is converted into mechanical energy in the magnetic gap 24 formed by the circuit system 2 to drive the voice coil 42 to drive the diaphragm assembly 41 to vibrate, thereby achieving sound production; at the same time, by providing a mounting hole 25 that passes through the magnetic yoke 21 and the central magnetic portion 22 in the magnetic circuit system 2, and arranging a conductive bracket 3 in the mounting hole 25, one end of the centering support 43 is electrically connected to the pad of the conductive bracket 3, and the other end of the centering support 43 is connected to the diaphragm assembly 41 and is electrically connected to the lead of the voice coil 42, so that the conductive bracket 3 can be used to not only achieve the installation and fixation of the centering support 43, but also can achieve the sound generation. The voice coil 42 is connected to the external circuit through the centering support 43 and the conductive bracket 3. At the same time, the centering support 43 can also effectively prevent the voice coil 42 from swinging or polarizing, thereby improving the acoustic performance of the sound-generating device 100. By setting the mounting hole 25 at the central position of the magnetic field utilization rate of the central magnetic part 22 in the magnetic circuit system 2 is not high, both weight reduction and installation and fixation of the conductive bracket 3 can be achieved. Moreover, since the centering support 43 is set at the center of the diaphragm assembly 41 and is connected to the conductive bracket in the mounting hole 25 set in the middle of the central magnetic part 22 3, so that the centering support piece 43 does not occupy the installation space of the edge magnet portion 23, thereby increasing the volume of the edge magnet portion 23; in addition, since there is a leakage phenomenon in the central position of the central magnet portion 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 in the central position of the central magnet portion 22, thereby reducing the leakage of the central magnet 221. When the sounding device 100 is assembled in an electronic device, the influence of the leakage of the central magnet 221 in the sounding device 100 on the performance of the electronic device can be reduced, thereby meeting the leakage requirements of the electronic device. Furthermore, by setting the centering support piece 43 as a main body 431 and a leg portion 432, the main body 431 is connected to the top of the conductive bracket 3 and electrically connected to the solder pad of the conductive bracket 3, and the inner side of the diaphragm assembly 41 is fixed to the main body 431, one end of the leg portion 432 is connected to the main body 431, and the other end of the leg portion 432 is connected to the diaphragm assembly 41 and electrically connected to the lead of the voice coil 42. In this way, the centering support piece 43 not only has good deformation ability, but also can extend the leg portion 432 to connect and conduct with the lead of the voice coil 42.

[0090] In one embodiment, the diaphragm assembly 41 includes a vibrating portion 411, a first fold portion 412 disposed outside the vibrating portion 411, and a second fold portion 413 disposed inside the vibrating portion 411. The inner side of the second fold portion 413 is connected to the main body 431. It is understood that the outer side of the first fold portion 412 is connected to a side of the housing 1 away from the magnetic circuit system 2, and the inner side of the second fold portion 413 is connected to the conductive bracket 3.

[0091] Optionally, the first fold portion 412 and the second fold portion 413 are recessed in opposite directions. In this embodiment, the second fold portion 413 protrudes toward the side away from the magnetic circuit system 2 , and the first fold portion 412 protrudes toward the side close to the magnetic circuit system 2 .

[0092] In this embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 8 、 Figure 14 As shown, by setting the diaphragm assembly 41 as a vibration part 411, a first folding ring part 412 provided on the outside of the vibration part 411 and a second folding ring part 413 provided on the inside of the vibration part 411, the inner side of the second folding ring part 413 is connected to the conductive bracket 3, and the recessed directions of the first folding ring part 412 and the second folding ring part 413 are opposite, so that the second folding ring part 413 is raised toward the side away from the magnetic circuit system 2, thereby utilizing the second folding ring part 413 of the diaphragm assembly 41 to provide an avoidance space for the centering support piece 43, thereby reducing the avoidance made by the central magnetic part 22 for the centering support piece 43, thereby increasing the volume of the central magnetic part 22, further improving the magnetic field strength of the magnetic circuit system 2, and then improving the BL value, thereby improving the acoustic performance of the sound-emitting device 100.

[0093] In one embodiment, the side magnet portion 23 may optionally be arranged in a closed annular shape. In this case, the annular side 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. It will be appreciated that because the centering support 43 is disposed in the center of the diaphragm assembly 41 and is connected to the conductive bracket 3 disposed in the mounting hole 25 in the middle of the central magnet portion 22, the centering support 43 does not occupy the space provided by the side magnet portion 23. Thus, the side magnet portion 23 can be increased in size, thereby increasing the magnetic field strength of the magnetic circuit system 2, thereby increasing the BL value and improving the acoustic performance of the sound-generating device 100.

[0094] Of course, in other embodiments, the edge magnetic portion 23 includes multiple edge magnetic portions 23, and the multiple edge magnetic portions 23 are arranged around the outside of the central magnetic portion 22, and are spaced apart from the central magnetic portion 22 to form a magnetic gap 24. Adjacent edge magnetic portions 23 are connected end to end to form a closed ring structure, which is not limited here.

[0095] In one embodiment, if Figures 3 to 7 As shown, the edge magnet portion 23 includes a stacked edge magnet 231 and an edge washer 232, with the edge magnet 231 sandwiched between the magnetic yoke 21 and the edge washer 232. In this embodiment, the edge magnet 231 can be a permanent magnet, and the edge washer 232 can be a magnetic plate structure, which is not limited here.

[0096] Optionally, the side magnets 231 and the side washers 232 both form a closed annular structure. In this case, the side magnetic portion 23 forms a closed annular structure and is arranged around the outside of the central magnetic portion 22. Of course, in other embodiments, there are multiple side magnets 231 and side washers 232, and they are arranged in a one-to-one correspondence. Adjacent side magnets 231 are connected end to end to form a closed annular structure, and adjacent side washers 232 are connected end to end to form a closed annular structure. In this case, the side magnetic portion 23 includes multiple side magnetic portions 23, and multiple side magnetic portions 23 are connected end to end to form a closed annular structure. This is not limited here.

[0097] It should be noted that the centering support plate 43 in the present invention is arranged in the center of the diaphragm assembly 41 and is connected to the conductive bracket 3 in the mounting hole 25 in the middle of the central magnetic part 22. Compared with the traditional solution in which the centering support plate 43 is arranged at the four corners of the magnetic circuit system 2, the centering support plate 43 in the present invention does not occupy the setting space of the side magnetic part 23, and there is no need to set a accommodating space for the centering support plate 43 between two adjacent side magnets 231, so that the side magnets 231 can be set into a closed ring structure, thereby increasing the setting volume of the side magnets 231, improving the magnetic field strength of the magnetic circuit system 2, and then improving the BL value.

[0098] In one embodiment, the first fold portion 412, the vibrating portion 411, and the second fold portion 413 of the diaphragm assembly 41 can be formed as an integrally molded structure to ensure the vibration performance and structural strength of the diaphragm assembly 41. For example, the first fold portion 412, the vibrating portion 411, and the second fold portion 413 of the diaphragm assembly 41 can be made of the same material and formed into an integrally molded structure, which can be selected based on actual usage requirements. In this embodiment, the first fold portion 412 and the second fold portion 413 have an upwardly protruding convex structure or a downwardly concave concave structure, which is not limited here.

[0099] In one embodiment, the vibrating portion 411 is formed as a vibration plate. Optionally, the vibration plate is made of metal or fiber. In this embodiment, the inner side of the first fold portion 412 is bonded to the outer periphery of the vibration plate, and the inner periphery of the vibration plate is bonded to the outer side of the second fold portion 413.

[0100] In one embodiment, if Figure 1 、 Figures 3 to 8As shown, the outer periphery of the vibration part 411 forms a first step surface 4111, and the inner periphery of the vibration part 411 forms a second step surface 4112; the inner side of the first folding ring part 412 extends along the vibration direction perpendicular to the vibration system 4 to form an inner fixing part 4121, and the outer side of the second folding ring part 413 extends along the vibration direction perpendicular to the vibration system 4 to form an outer fixing part 4131; wherein, the inner fixing part 4121 overlaps the first step surface 4111 and is bonded to the first step surface 4111, and the outer fixing part 4131 overlaps the second step surface 4112 and is bonded to the second step surface 4112.

[0101] As can be understood, the vibrating portion 411 is respectively bonded to the first fold portion 412 and the second fold portion 413. By forming a first step surface 4111 on the outer periphery of the vibrating portion 411, the first step surface 4111 is recessed toward the magnetic circuit system 2, thereby ensuring that the inner fixing portion 4121 of the first fold portion 412 overlaps the first step surface 4111. When bonded to the first step surface 4111, the side of the inner fixing portion 4121 facing away from the first step surface 4111 is flush with the vibrating portion 411, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41. At the same time, by forming a second step surface 4112 on the inner periphery of the vibrating part 411, the second step surface 4112 is recessed in the direction close to the magnetic circuit system 2, thereby ensuring that the outer fixing part 4131 of the second folding ring part 413 overlaps the second step surface 4112, and when bonded to the second step surface 4112, the side of the outer fixing part 4131 facing away from the second step surface 4112 is flush with the vibrating part 411, thereby making the assembly structure more compact and saving vibration space.

[0102] In this embodiment, if Figure 1 、 Figures 3 to 7 As shown, the vibrating portion 411 has a convex portion 4113 that projects away from the magnetic circuit system 2. The leads of the voice coil 42 are routed along the inner wall of the convex portion 4113 and are electrically connected to the centering support 43. Optionally, the end surface of a portion of the voice coil 42 facing the diaphragm assembly 41 corresponds to and is spaced from the convex portion 4113. The convex portion 4113 of the vibrating portion 411 provides routing and clearance space for the leads of the voice coil 42, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41.

[0103] It can be understood that the vibration part 411 is formed by stamping to form a convex part 4113, a first step surface 4111 and a second step surface 4112. The first step surface 4111 is located at the outer periphery of the convex part 4113 and is close to the magnetic circuit system 2. The second step surface 4112 is located at the inner periphery of the convex part 4113 and is close to the magnetic circuit system 2.

[0104] Optionally, the voice coil 42 is rectangular and includes two long sides 421 and two short sides 422 connected end to end. The voice coil 42 has two leads, one provided on each of the two long sides 421 or the short sides 422. In this embodiment, the convex portion 4113 of the vibrating portion 411 corresponds to the two leads provided on each of the two long sides 421 or the short sides 422 of the voice coil 42, but this is not a limitation herein.

[0105] In one embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 14 As shown, a hollow hole 4132 is provided on the inner side of the second folding ring portion 413 , and a portion of the centering support piece 43 is exposed in the hollow hole 4132 .

[0106] It can be understood that by setting a hollow hole 4132 at the central position of the diaphragm assembly 41, part of the centering support plate 43 is exposed in the hollow hole 4132, so that the hollow hole 4132 is used to dissipate heat for the centering support plate 43 and the conductive bracket 3, so as to improve the service life of the diaphragm assembly 41, the centering support plate 43 and the conductive bracket 3.

[0107] In one embodiment, if Figures 1 to 4 、 Figure 6 As shown, the outer side of the first folding ring portion 412 of the diaphragm assembly 41 extends perpendicularly to the vibration direction of the vibration system 4 to form a fixing portion, which is connected and fixed to the housing 1.

[0108] It is understandable that in order to further increase the connection area between the diaphragm assembly 41 and the housing 1 and improve stability, the end of the fixing portion away from the first fold portion 412 is bent and extended toward the housing 1 to form a bent portion, and the bent portion is connected to the outer wall of the housing 1. By bending the outer side of the fixing portion downward to form the bent portion, the bent portion is connected to the outer wall of the housing 1, thereby increasing the connection area with the housing 1 and improving the connection stability and sealing performance.

[0109] To further enhance the structural strength of the vibrating portion 411 of the diaphragm assembly 41, in one embodiment, the diaphragm assembly 41 further includes a reinforcement portion disposed on the vibrating portion 411. As will be appreciated, the reinforcement portion effectively enhances the structural strength of the vibrating portion 411, thereby improving the connection stability of the voice coil 42 and preventing the diaphragm assembly 41 from tearing when the voice coil 42 drives the diaphragm assembly 41 to vibrate.

[0110] In this embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 8 、 Figures 10 to 15As shown, the main body 431 of the centering support 43 is fixed to the end of the conductive bracket 3 away from the magnetic yoke 21, and at least a portion of the main body 431 is exposed in the hollow hole 4132. Optionally, the main body 431 of the centering support 43 is located between the conductive bracket 3 and the inner side of the second fold portion 413 of the diaphragm assembly 41.

[0111] As will be understood, the leg portion 432 is opposed to the second fold portion 413 of the diaphragm assembly 41. Optionally, along the vibration direction of the vibration system 4, the second fold portion 413 protrudes and extends away from the leg portion 432 and is disposed opposite the leg portion 432. This provides vibration and clearance space for the leg portion 432 of the centering support plate 43, thereby reducing the clearance required by the central magnetic portion 22 for the centering support plate 43, increasing the volume of the central magnetic portion 22, and improving the magnetic field strength of the magnetic circuit system 2, thereby increasing the BL value and improving the acoustic performance of the sound-generating device 100.

[0112] Optionally, the main body 431 and the leg portions 432 are integrally formed. This effectively simplifies the processing steps for the centering support 43 and improves the structural strength of the centering support 43. In this embodiment, the main body 431 and the leg portions 432 are optionally located on the same plane, thereby ensuring the structural strength of the centering support 43.

[0113] In one embodiment, if Figure 3 、 Figure 8 and Figure 15 As shown, the main body 431 is provided with a first pad 4311 , and the leg 432 is provided with a second pad 4323 at one end away from the main body 431 . The first pad 4311 is electrically connected to the pad of the conductive bracket 3 , and the second pad 4323 is electrically connected to the lead of the voice coil 42 .

[0114] As can be understood, this arrangement ensures that the voice coil 42 is electrically connected to the conductive bracket 3 via the centering support 43. Optionally, the first solder pad 4311 of the main body 431 is exposed through the hollow hole 4132 to achieve heat dissipation. In this embodiment, the second solder pad 4323 is correspondingly connected to the second stepped surface 4112 of the vibrating portion 411.

[0115] In one embodiment, if Figure 3 、 Figure 8 and Figure 15 As shown, the two legs 432 are provided. In this embodiment, the voice coil 42 has two leads, one for input and one for output. By providing two legs 432 on the centering support 43, the two leads can be connected to the two legs 432, thereby allowing current to flow into the voice coil 42. Optionally, the two legs 432 of the centering support 43 are symmetrically arranged.

[0116] In one embodiment, if Figure 3and Figure 8 As shown, the voice coil 42 can optionally be rectangular, comprising two long sides 421 and two short sides 422 connected end to end. In this embodiment, the voice coil 42 has two leads. Optionally, the two leads are located on either the long sides 421 or the short sides 422, respectively. The centering support 43 includes two symmetrically arranged legs 432, each corresponding to and electrically connected to a lead.

[0117] In one embodiment, the leg portion 432 includes a first leg 4321 and a second leg 4322 connected to each other, the first leg 4321 extends along the short axis direction of the main body portion 431 and is connected to the main body portion 431, and the second leg 4322 extends along the long axis direction of the main body portion 431 and is connected to the diaphragm assembly 41.

[0118] In this embodiment, if Figure 3 、 Figure 8 and Figure 15 As shown, by configuring the leg portion 432 as a first leg 4321 extending along the short axis of the main body 431 and a second leg 4322 extending along the long axis of the main body 431, the leg portion 432 of the centering support 43 not only has good deformability, but also can be extended to connect to the lead wire of the voice coil 42. Optionally, a second solder pad 4323 is provided at one end of the second leg 4322 away from the first leg 4321.

[0119] It is understood that along the vibration direction of the vibration system 4, the second fold 413 is opposite to the first leg 4321 and the second leg 4322. Thus, the second fold 413 of the diaphragm assembly 41 can avoid the first leg 4321 and the second leg 4322 of the centering support 43, thereby reducing the avoidance of the central magnetic portion 22 for the first leg 4321 and the second leg 4322, increasing the magnetic field strength of the central magnetic portion 22, and thus improving the BL value and the acoustic performance of the sound-generating device 100.

[0120] Optionally, the leg portion 432 includes a plurality of first legs 4321 and a plurality of second legs 4322, which are alternately arranged. It will be appreciated that this arrangement ensures that even when two lead wires are respectively arranged on the two long sides 421 or the short sides 422 of the voice coil 42, they can still be smoothly connected to the leg portion 432, and also ensures that the leg portion 432 of the centering support 43 has good deformability.

[0121] In one embodiment, the central magnetic portion 22 is provided with a relief structure 224 corresponding to the leg portion 432 , and the relief structure 224 is connected to the mounting hole 25 .

[0122] In this embodiment, if Figure 3、 Figure 9 As shown, by providing a relief structure 224 on central magnetic portion 22, relief structure 224 corresponds to centering arm 43, thereby further ensuring deformation and vibration space for centering arm 43, preventing centering arm 43 from interfering with central magnetic portion 22 during vibration, thereby affecting the sound performance of sound-generating device 100. Optionally, relief structure 224 corresponds to leg portion 432 of centering arm 43.

[0123] Optionally, the relief structure 224 is a groove 313 formed by the central magnetic portion 22 being recessed toward the magnetic guide yoke 21. Of course, in other embodiments, the relief structure 224 is a through-hole extending through the central magnetic portion 22, which is not limited here. In this embodiment, the relief structure 224 is connected to the mounting hole 25, thereby ensuring sufficient space for deformation and vibration of the leg portion 432 of the centering support 43.

[0124] In one embodiment, the central magnetic portion 22 includes a stacked central magnet 221 and a central washer 222 . The central magnet 221 is sandwiched between the central washer 222 and the magnetic yoke 21 . The mounting hole 25 passes through the magnetic yoke 21 , the central magnet 221 , and the central washer 222 in sequence.

[0125] In this embodiment, if Figures 3 to 7 As shown, by setting the central magnetic part 22 as a stacked central magnet 221 and a central washer 222, the central magnet 221 is sandwiched between the central washer 222 and the magnetic yoke 21, and the mounting hole 25 passes through the magnetic yoke 21, the central magnet 221 and the central washer 222 in sequence. In this way, the mounting hole 25 can be effectively utilized to reduce the weight of the central magnetic part 22. Since the magnet in the middle position of the central magnetic part 22 contributes less to the magnetic field strength, the conductive bracket 3 can be installed and fixed under the premise of having little impact on the magnetic field strength.

[0126] It can be understood that the center washer 222 forms a first through hole, the center magnet 221 forms a second through hole, and the magnetic yoke 21 forms a third through hole. The first through hole, the second through hole and the third through hole are connected in sequence to form the mounting hole 25.

[0127] Optionally, the central magnetic portion 22 may be provided in an annular structure, so that a through-hole structure is formed in the center of the central magnetic portion 22. Of course, in other embodiments, the central magnetic portion 22 includes a plurality of strip structures, the plurality of strip structures enclose a ring structure, and the plurality of strip structures enclose a through-hole structure, which is not limited here.

[0128] It is understood that the center magnet 221 can optionally be arranged in an annular shape, so that a second through-hole is formed in the center of the center magnet 221. Of course, in other embodiments, the center magnet 221 includes multiple center magnets 221, and the multiple center magnets 221 are arranged in an annular shape to form the mounting hole 25, that is, the multiple center magnets 221 are arranged in an annular shape to form the second through-hole. The center washer 222 is arranged in an annular shape, so that a first through-hole is formed in the center of the center washer 222. Of course, in other embodiments, the center washer 222 includes multiple center washers 222, and the multiple center washers 222 are arranged in an annular shape to form the mounting hole 25, that is, the multiple center washers 222 are arranged in an annular shape to form the first through-hole, which is not limited here.

[0129] In one embodiment, the center washer 222 is provided with a recessed groove directed away from the diaphragm assembly 41 to form a relief structure 224 for circumventing the centering arm 43. As will be appreciated, by providing a recessed groove or a through-hole extending through the center washer 222 of the central magnetic portion 22 to form the relief structure 224, the relief structure 224 can be utilized to provide space for deformation and vibration of the leg portion 432 of the centering arm 43, thereby ensuring the sound quality of the sound-generating device 100.

[0130] In another embodiment, Figure 3 As shown, the center washer 222 is provided with a first groove that is recessed in the direction away from the diaphragm assembly 41, and the center magnet 221 is provided with a second groove that is recessed in the direction away from the diaphragm assembly 41. The first groove and the second groove are connected and together form an avoidance structure 224 for avoiding the centering support plate 43.

[0131] In this embodiment, the first groove can be a groove recessed in the center washer 222 or a through-hole extending through the center washer 222. Optionally, at least a portion of the first groove can be a through-hole extending through the center washer 222. The second groove can be a groove recessed in the center magnet 221 or a through-hole extending through the center magnet 221. Optionally, at least a portion of the first groove and the second groove can communicate and together form a relief structure 224. This provides space for deformation and vibration of the leg portion 432 of the centering support 43, thereby ensuring the sound effect of the sound-generating device 100.

[0132] Optionally, the portion of the avoidance structure 224 corresponding to the leg portion 432 of the centering support piece 43 is a groove recessed in the center washer 222, and the portion of the avoidance structure 224 corresponding to the second solder pad 4323 of the leg portion 432 of the centering support piece 43 is a through-hole structure that sequentially passes through the center washer 222 and the center magnet 221, although this is not limited herein. In this embodiment, the avoidance structure 224 communicates with the mounting hole 25.

[0133] In one embodiment, a portion of the center washer 222 is recessed in a direction away from the diaphragm assembly 41 to form an avoidance area 223. One end of the avoidance area 223 is connected to the avoidance structure 224, and the other end of the avoidance area 223 extends toward the periphery of the center washer 222. The avoidance area 223 corresponds to the lead setting of the voice coil 42.

[0134] In this embodiment, if Figure 3 and Figure 9 As shown, by providing a clearance area 223 on the center washer 222, the clearance area 223 is arranged to correspond to the leads of the voice coil 42, thereby providing sufficient vibration space for the leads of the voice coil 42. Optionally, the clearance area 223 corresponds to the leads of the voice coil 42. Of course, in other embodiments, the clearance area 223 can also be provided to correspond to the vibrating portion 411 and the centering support plate 43, thereby providing sufficient vibration space for the vibrating portion 411 and the centering support plate 43. Optionally, the clearance area 223 is provided to correspond to the second step surface 4112 of the vibrating portion 411, which is not limited here.

[0135] It is understood that one end of the avoidance region 223 is connected to the avoidance structure 224 and / or the mounting hole 25, and the other end of the avoidance region 223 extends toward the periphery of the center washer 222. Optionally, the avoidance region 223 is a groove structure formed by the center washer 222 being recessed in a direction away from the diaphragm assembly 41, which is not limited here. Of course, in other embodiments, the avoidance region 223 may be a through hole or notch structure that passes through the center washer 222, which is not limited here.

[0136] In one embodiment, the conductive bracket 3 and the magnetic yoke 21 are integrally injection molded. It is understood that by integrally injection molding the conductive bracket 3 and the magnetic yoke 21, the installation stability of the conductive bracket 3 and the magnetic yoke 21 is improved, and the processing steps and assembly efficiency are simplified.

[0137] In one embodiment, the conductive bracket 3 includes a main body 31 and a solder pad 32. The main body 31 is provided with a first soldering surface 311 and a second soldering surface 312 arranged opposite to each other. The solder pad 32 is embedded in the main body 31. The solder pad 32 includes a first soldering pad portion 321 and a second soldering pad portion 322 connected to each other. At least part of the first soldering pad portion 321 is exposed on the first soldering surface 311, and at least part of the second soldering pad portion 322 is exposed on the second soldering surface 312; wherein the first soldering surface 311 is connected to the main body 431, and the second soldering surface 312 is used to connect to an external power supply.

[0138] Optionally, the main body 31 is a plastic material piece, and the solder pad 32 is injection molded in the main body 31, and the solder pad 32 is embedded in the main body 31. In the embodiment, the conductive support 3 is provided with a first welding surface 311 and a second welding surface 312 which are arranged oppositely, the first welding surface 311 is arranged to face the centering support sheet 43 and is connected with the centering support sheet 43, and the second welding surface 312 is used to connect an external power supply; wherein, along the vibration direction of the vibration system 4, the first welding surface 311 is higher than the side surface of the center magnetic part 22 which faces the diaphragm assembly 41.

[0139] In the embodiment, as shown in Figure 3 、 Figure 4 、 Figure 6 、 Figures 10 to 13 , the first welding surface 311 is formed on the side of the conductive support 3 which faces the centering support sheet 43, and the second welding surface 312 is further arranged on the side of the conductive support 3 which is opposite to the first welding surface 311, so that the first welding surface 311 is connected with the centering support sheet 43 in conduction, and the second welding surface 312 is used to connect the external power supply, thereby making the conductive support 3 connect the external circuit with the centering support sheet 43 in conduction, so as to supply power to the voice coil 42.

[0140] It can be understood that the main body part 431 of the centering support sheet 43 is fixed to the first welding surface 311, and the first welding pad 4311 is connected with the first welding surface 311 in conduction.

[0141] Optionally, along the vibration direction of the vibration system 4, the first welding surface 311 is higher than the side surface of the center magnetic part 22 which faces the diaphragm assembly 41. In this way, a space for the vibration of the centering support sheet 43 is formed between the first welding surface 311 of the conductive support 3 and the center magnetic part 22, and at the same time, the second folded ring part 413 of the diaphragm assembly 41 provides vibration space for the centering support sheet 43, which can facilitate the installation of the centering support sheet 43 without affecting the diaphragm assembly 41, and can also ensure that the centering support sheet 43 has sufficient vibration space during vibration.

[0142] In an embodiment, the side of the main body 31 which is opposite to the first welding surface 311 is provided with a groove 313, and the bottom wall of the groove 313 forms the second welding surface 312.

[0143] In the embodiment, as shown in Figure 4 、 Figure 6 、 Figure 11 、 Figure 13 , the groove 313 is arranged on the side of the conductive support 3 which is opposite to the first welding surface 311, so that the bottom wall of the groove 313 forms the second welding surface 312, thereby providing installation space for the conductive circuit or flexible circuit board which is used to connect the conductive support 3, and realizing protection of the conductive circuit or flexible circuit board.

[0144] Optionally, the pad 32 and the main body 31 of the conductive bracket 3 can be integrally formed by injection molding. Figure 4 、 Figure 6 、 Figure 11 、 Figure 13 As shown, the main body 31 of the conductive bracket 3 can be a plastic part, and the pad 32 can be a metal conductive part.

[0145] It can be understood that by setting the pad piece 32 as a first pad portion 321 and a second pad portion 322 that are connected, at least a portion of the first pad portion 321 is exposed on the first welding surface 311, and at least a portion of the second pad portion 322 is exposed on the second welding surface 312, thereby facilitating the connection and conduction between the first pad 4311 of the centering support piece 43 and the first pad portion 321 of the first welding surface 311, and the connection and conduction between the conductive circuit or the flexible circuit board of the external circuit and the second pad portion 322 of the second welding surface 312, thereby smoothly conducting the external current through the conductive bracket 3 and the centering support piece 43 to the voice coil 42.

[0146] It is understood that the first soldering surface 311 is provided with two first soldering pad contacts. In this embodiment, the first soldering pad portion 321 of the soldering pad sheet 32 ​​is exposed on the first soldering surface 311 to form two first soldering pad contacts spaced apart. Optionally, the two first soldering pad contacts are spaced apart along the long axis of the magnetic circuit system 2; or, the two first soldering pad contacts are spaced apart along the short axis of the magnetic circuit system 2.

[0147] It should be noted that the two first pad contacts are arranged at intervals along the long axis direction of the magnetic circuit system 2. At this time, the two first pads 4311 of the main body 431 of the centering support 43 are arranged along the long axis direction of the magnetic circuit system 2 and are connected to the two first pad contacts respectively. Figure 3 、 Figure 10 and Figure 12 As shown, the two first solder pad contacts are arranged at intervals along the short axis direction of the magnetic circuit system 2. At this time, the two first solder pads 4311 of the main body 431 of the centering support piece 43 are arranged along the long axis direction of the magnetic circuit system 2 and are respectively connected to the two first solder pad contacts.

[0148] It is understood that the second soldering surface 312 is provided with two second soldering pad contacts. In this embodiment, the second soldering pad portion 322 of the soldering pad sheet 32 ​​is exposed on the second soldering surface 312 to form two second soldering pad contacts spaced apart. Optionally, the two second soldering pad contacts are spaced apart along the long axis of the magnetic circuit system 2; or, the two second soldering pad contacts are spaced apart along the short axis of the magnetic circuit system 2.

[0149] In an embodiment, the magnetic yoke 21, the main body 31 and the soldering pad 32 are integrally injection molded. It can be understood that the main body 31 of the conductive support 3 is a plastic part, the soldering pad 32 can be selected as a metal conductive part, the magnetic yoke 21 is a metal magnetic plate, and the main body 31, the soldering pad 32 and the magnetic yoke 21 of the conductive support 3 are optionally integrally injection molded, so that the installation stability of the conductive support 3 and the magnetic yoke 21 can be improved, and the processing and assembly steps are simplified.

[0150] In an embodiment, the magnetic yoke 21 is provided with a positioning table 211 adjacent to the mounting hole 25, and the conductive support 3 is provided with a positioning groove 314 corresponding to the positioning table 211, and the positioning table 211 is embedded in the positioning groove 314.

[0151] In the present embodiment, as shown in Figure 4 , Figures 11 to 13 , the positioning table 211 is provided on the magnetic yoke 21, so that the conductive support 3 is further installed, fixed and positioned by the positioning table 211. It can be understood that when the conductive support 3 and the magnetic yoke 21 are injection molded, the positioning table 211 is embedded in the main body 31 of the conductive support 3 to form a positioning groove 314 on the conductive support 3, that is, the positioning groove 314 corresponds to the positioning table 211, and the positioning table 211 is embedded in the positioning groove 314.

[0152] It can be understood that the positioning table 211 is arranged adjacent to the mounting hole 25. Alternatively, the positioning table 211 can be a protrusion extending towards one side of the diaphragm assembly 41; or the positioning table 211 can be a protrusion extending towards one side away from the diaphragm assembly 41, which is not limited herein.

[0153] In an embodiment, the positioning table 211 is formed by bending one side of the magnetic yoke 21 adjacent to the mounting hole 25, that is, the positioning table 211 is formed by bending one side of the magnetic yoke 21 adjacent to the third through hole. Alternatively, the positioning table 211 and the magnetic yoke 21 are integrally formed, so that the processing steps of the magnetic yoke 21 can be simplified, and the structural strength of the positioning table 211 can be improved. Of course, in other embodiments, the positioning table 211 and the magnetic yoke 21 can also be separately arranged, and the positioning table 211 is connected to the magnetic yoke 21 by welding or pasting, which is not limited herein.

[0154] In the present embodiment, the magnetic yoke 21 is formed by punching to form the positioning table 211. Alternatively, the positioning table 211 is formed by bending one side of the magnetic yoke 21 adjacent to the mounting hole 25 towards the side close to the diaphragm assembly 41, which is not limited herein. In this way, the side of the magnetic yoke 21 away from the diaphragm assembly 41 can be arranged as a plane, facilitating the assembly of the sound generating device 100 in the electronic equipment. At the same time, the positioning table 211 can be used to position and limit the center magnetic part 22 and the conductive support 3.

[0155] Optionally, the positioning platform 211 is an annular boss arranged around the mounting hole 25. Such arrangement can effectively increase the contact area between the positioning platform 211 and the conductive support 3, thereby improving the installation stability. Of course, in other embodiments, the positioning platform 211 includes a plurality of positioning platforms 211 arranged at intervals along the periphery of the mounting hole 25. It can be understood that the spacing between the two adjacent positioning platforms 211 can not only reduce the cost, but also achieve the installation and positioning effect of the conductive support 3.

[0156] In an embodiment, the main body 31 includes a first connecting portion 315 and a second connecting portion 316 arranged on the side of the first connecting portion 315 close to the diaphragm assembly 41, the first connecting portion 315 is connected with the magnetic yoke 21, and the second connecting portion 316 is connected with the centering support 43; wherein the second connecting portion 316 is recessed and extended in a direction away from the center magnetic portion 22 relative to the first connecting portion 315 to form an avoiding space 317 for avoiding the centering support 43.

[0157] In the embodiment, as shown in Figure 3 、 Figure 4 、 Figure 6 、 Figures 10 to 13 , the conductive support 3 is arranged as the first connecting portion 315 and the second connecting portion 316 connected with each other, so that the first connecting portion 315 is connected with the magnetic yoke 21 and the second connecting portion 316 is connected with the centering support 43. It can be understood that the second connecting portion 316 is recessed and extended in a direction away from the center magnetic portion 22 relative to the first connecting portion 315 to form the avoiding space 317 for avoiding the centering support 43, so that the avoiding space 317 provides vibration and avoiding space for the centering support 43.

[0158] It can be understood that by forming the avoiding space 317 on the conductive support 3, the avoiding of the center magnetic portion 22 for the centering support 43 can be further reduced, so that the volume of the center magnetic portion 22 is increased, thereby improving the magnetic field strength, which can improve the BL value and improve the acoustic performance of the sound generating device 100.

[0159] In the embodiment, the main body 31 of the conductive support 3 forms the first connecting portion 315 and the second connecting portion 316 connected with each other. Optionally, the connection between the first connecting portion 315 and the second connecting portion 316 forms a stepped structure, so that the stepped structure forms the avoiding space 317. It can be understood that the solder pad 32 of the conductive support 3 is injection molded in the main body 31. Optionally, the side of the first connecting portion 315 away from the second connecting portion 316 forms a second solder surface 312, and the side of the second connecting portion 316 away from the first connecting portion 315 forms a first solder surface 311, which is not limited herein.

[0160] In one embodiment, a pressing groove 212 is further provided on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 . One end of the pressing groove 212 is connected to the mounting hole 25 , and the other end of the pressing groove 212 extends toward the periphery of the magnetic yoke 21 . The pressing groove 212 is used to avoid wiring.

[0161] In this embodiment, if Figure 2 As shown, by providing a pressing groove 212 on the magnetic yoke 21, one end of the pressing groove 212 is connected to the mounting hole 25, and the other end of the pressing groove 212 extends toward the periphery of the magnetic yoke 21, so that the pressing groove 212 can be conveniently used for avoiding wiring.

[0162] As will be appreciated, the conductive bracket 3 of the sound-generating device 100 is connected to an external circuit via a conductive circuit or a flexible circuit board. The groove 212 on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 provides routing space for the conductive circuit or flexible circuit board, and facilitates positioning and position-limiting installation of the routing structure, thereby making the overall structure more compact and saving space. Alternatively, the groove 212 is formed by a depression on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41.

[0163] Optionally, the pressing groove 212 includes a plurality of pressing grooves 212, which are spaced apart. In this embodiment, one end of the plurality of pressing grooves 212 is connected to the mounting hole 25, and the other end of the plurality of pressing grooves 212 extends toward the periphery of the guide yoke 21 and is spaced apart.

[0164] In order to improve the balance performance of the sound-generating device 100, the plurality of pressing grooves 212 are symmetrically arranged with respect to the mounting hole 25. Of course, in other embodiments, the plurality of pressing grooves 212 can optionally be radially arranged with respect to the mounting hole 25 as the center, which is not limited here.

[0165] In one embodiment, a peripheral edge of the magnetic yoke 21 is further provided with an escape notch 213 , and an end of the pressing groove 212 away from the mounting hole 25 is communicated with the escape notch 213 .

[0166] In this embodiment, if Figure 2 、 Figure 3 and Figure 10 As shown, by setting an avoidance gap 213 on the periphery of the magnetic yoke 21, the end of the pressing groove 212 away from the mounting hole 25 is connected to the avoidance gap 213. In this way, the avoidance gap 213 can be used to further limit the assembly of structures such as conductive circuits or flexible circuit boards, thereby realizing directional wiring installation.

[0167] In one embodiment, if Figure 2As shown, the periphery of the side of the shell 1 opposite to the diaphragm assembly 41 is provided with a positioning column, and the magnetic yoke 21 is provided with a positioning notch corresponding to the positioning column, and the positioning column and the positioning notch are in positioning cooperation. It can be understood that by providing the positioning column on the shell 1 and forming the positioning notch on the magnetic yoke 21 which is in positioning cooperation with the positioning column, the positioning and installation cooperation of the magnetic circuit system 2 is realized, and the installation convenience and accuracy are improved.

[0168] In the embodiment, as shown in the figure, Figure 3 , Figure 4 , Figure 6 As shown, the edge magnetic part 23 includes the edge magnet 231 and the edge amperometric sensor 232 which are stacked, the edge magnet 231 is clamped between the edge amperometric sensor 232 and the magnetic yoke 21, and the edge amperometric sensor 232 is connected with the shell 1. Alternatively, the edge amperometric sensor 232 and the shell 1 are an integral molding structure, so that the structure can be simplified, and the installation stability can be improved.

[0169] The present application also provides a sound production module, which comprises the sound production device 100 described above, and the specific structure of the sound production device 100 is referred to the foregoing embodiments. Since the sound production module adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0170] In an embodiment, the sound production module further comprises a flexible circuit board, one end of the flexible circuit board is electrically connected with the conductive support 3 of the sound production device 100, and the other end of the flexible circuit board is used for connecting an external power supply.

[0171] It can be understood that the flexible circuit board is used for connecting and conducting the external circuit and the sound production 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 and conducted with the second welding surface 312 of the conductive support 3 of the sound production device 100, and the outer pad of the flexible circuit board is used for connecting with an external terminal.

[0172] In the embodiment, the sound production module further comprises a module shell, the module shell has a containing cavity, the sound production device 100 is arranged in the containing cavity of the module shell, and at least one end of the flexible circuit board connected with the sound production device 100 is located in the containing cavity of the module shell. Of course, in other embodiments, the flexible circuit board can also be arranged in the containing cavity of the module shell, which is not limited here.

[0173] The present application also provides an electronic device, which comprises the sound production device 100 described above. The specific structure of the sound production device 100 is referred to the foregoing embodiments. Since the electronic device adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0174] In this embodiment, the electronic device further includes a device housing, and the sound generating device 100 and the flexible circuit board are both disposed in the device housing. It is understood that the electronic device may be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited here.

[0175] The present invention also provides an electronic device including the aforementioned sound module. The specific structure of the sound module is similar to that of the aforementioned embodiments. Since this electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here.

[0176] It is understandable that the electronic device can be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., which is not limited here. In this embodiment, the electronic device further includes a device housing, and the sound module is disposed in the device housing.

[0177] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications 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 magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and a central magnetic portion and an edge magnetic portion provided on the magnetic yoke, the edge magnetic portion being located outside the central magnetic portion and enclosing a magnetic gap with the central magnetic portion, the magnetic circuit system being provided with a mounting hole extending through the magnetic yoke and the central magnetic portion; a conductive bracket, the conductive bracket being disposed in the mounting hole; and A vibration system comprising a diaphragm assembly, a voice coil, and a centering support. The diaphragm assembly is an annular structure. One end of the voice coil is connected to the diaphragm assembly, and the other end of the voice coil is suspended within the magnetic gap. The centering support comprises a main body and a leg portion. The main body is connected to the top of the conductive bracket and electrically connected to the pad of the conductive bracket. The inner side of the diaphragm assembly is fixed to the main body. One end of the leg portion is connected to the main body, and the other end of the leg portion is connected to the diaphragm assembly and electrically connected to the lead of the voice coil. Among them, the diaphragm assembly includes a vibration part, a first folding ring part arranged on the outside of the vibration part, and a second folding ring part arranged on the inside of the vibration part, the inner side of the second folding ring part is connected to the main body part; the inner side of the second folding ring part is provided with a hollow hole, and part of the centering support plate is exposed in the hollow hole.

2. The sound-generating device according to claim 1, wherein: The leg portion includes a first leg and a second leg connected to each other, the first leg extending along the short axis direction of the main body portion and connected to the main body portion, and the second leg extending along the long axis direction of the main body portion and connected to the diaphragm assembly.

3. The sound-generating device according to claim 2, wherein: The leg portion includes a plurality of first legs and a plurality of second legs, and the plurality of first legs and the plurality of second legs are alternately arranged.

4. The sound-generating device according to claim 1, wherein: The voice coil is in a rectangular ring shape and includes two long sides and two short sides connected end to end. The voice coil has two lead wires, and the two lead wires are respectively arranged on the two long sides or the short sides.

5. The sound-generating device according to claim 1, wherein: The main body and the leg parts are an integrally formed structure; And / or, the main body and the leg portions are located in the same plane; And / or, the main body is provided with a first pad, and the leg portion is provided with a second pad at one end away from the main body, the first pad is electrically connected to the pad of the conductive bracket, and the second pad is electrically connected to the lead of the voice coil.

6. The sound-generating device according to claim 1, wherein: The central magnetic portion is provided with a relief structure corresponding to the leg portion, and the relief structure is connected to the mounting hole; The avoidance structure is a groove formed by the central magnetic part being recessed toward the magnetic yoke; or, the avoidance structure is a through-hole structure penetrating the central magnetic part.

7. The sound-generating device according to claim 6, wherein: The central magnetic portion includes a stacked central magnet and a central washer, the central magnet is sandwiched between the central washer and the magnetic yoke, and the mounting hole sequentially passes through the magnetic yoke, the central magnet, and the central washer; In which, the center washer is provided with a groove which is recessed in the direction away from the diaphragm assembly to form the avoidance structure; or, the center washer is provided with a first groove which is recessed in the direction away from the diaphragm assembly, and the center magnet is provided with a second groove which is recessed in the direction away from the diaphragm assembly, and the first groove and the second groove are connected and together form the avoidance structure.

8. The sound-generating device according to claim 7, wherein: Part of the center washer is recessed in a direction away from the diaphragm assembly to form a avoidance area, one end of the avoidance area is connected to the avoidance structure, and the other end of the avoidance area extends toward the periphery of the center washer, and the avoidance area corresponds to the lead setting of the voice coil.

9. The sound-generating device according to claim 7, wherein: The central magnet is arranged in a ring shape; or, the central magnet includes multiple central magnets, and the multiple central magnets are arranged in a ring shape to form the mounting hole.

10. The sound generating device according to claim 7, wherein: The center washer is arranged in a ring shape; or, the center washer includes a plurality of center washers, and the plurality of center washers are arranged in a ring shape to form the mounting hole.

11. The sound generating device according to claim 1, wherein: The conductive support comprises: A main body, the main body having a first welding surface and a second welding surface disposed away from each other; and a solder pad sheet embedded in the main body, the solder pad sheet comprising a first solder pad portion and a second solder pad portion connected to each other, at least a portion of the first solder pad portion being exposed on the first soldering surface, and at least a portion of the second solder pad portion being exposed on the second soldering surface; Wherein, the first welding surface is connected to the main body, and the second welding surface is used to connect to an external power source.

12. The sound generating device according to claim 11, wherein: Along the vibration direction of the vibration system, the first welding surface is higher than the surface of the central magnetic portion facing the diaphragm assembly; And / or, a groove is provided on a side of the main body facing away from the first welding surface, and a bottom wall of the groove forms the second welding surface; And / or, the magnetic yoke, the main body and the solder pad are integrally injection molded.

13. The sound-generating device according to claim 1, wherein: The first folding ring portion, the vibration portion and the second folding ring portion are an integrally formed structure; or, the vibration portion is formed as a vibration plate, the material of the vibration plate is metal or fiber material, the inner side of the first folding ring portion is bonded to the outer periphery of the vibration plate, and the inner periphery of the vibration plate is bonded to the outer side of the second folding ring portion.

14. The sound generating device according to claim 13, wherein: Along the vibration direction of the vibration system, the second folding ring portion protrudes and extends in a direction away from the magnetic circuit system, and the second folding ring portion is arranged opposite to the leg portion.

15. The sound generating device according to claim 13, wherein: The outer periphery of the vibration part forms a first step surface, and the inner periphery of the vibration part forms a second step surface; The inner side of the first folding ring portion extends perpendicularly to the vibration direction of the vibration system to form an inner fixing portion, and the outer side of the second folding ring portion extends perpendicularly to the vibration direction of the vibration system to form an outer fixing portion; The inner fixing portion is overlapped on the first step surface and bonded to the first step surface, and the outer fixing portion is overlapped on the second step surface and bonded to the second step surface.

16. The sound generating device according to claim 15, wherein: The side of the inner fixing portion facing away from the first step surface is flush with the vibrating portion; And / or, a side of the external fixing portion facing away from the second step surface is flush with the vibrating portion; And / or, the second folding ring portion protrudes toward a side away from the magnetic circuit system, and the first folding ring portion protrudes toward a side close to the magnetic circuit system.

17. The sound generating device according to any one of claims 1 to 16, characterized in that: The edge magnet portion includes a stacked edge magnet and an edge washer, wherein the edge magnet is sandwiched between the magnetic yoke and the edge washer; The side magnets and the side washers both form a closed annular structure; or, there are multiple side magnets and multiple side washers, which are arranged in a one-to-one correspondence, and adjacent side magnets are connected end to end to form a closed annular structure.

18. The sound generating device according to any one of claims 1 to 16, characterized in that: A pressing groove is further provided on the side of the magnetic yoke facing away from the diaphragm assembly, one end of the pressing groove is connected to the mounting hole, and the other end of the pressing groove extends toward the periphery of the magnetic yoke, and the pressing groove is used to avoid wiring.

19. A sound module, characterized in that: The sound module includes: module housing; The sound-generating device according to any one of claims 1 to 18, wherein the sound-generating device is disposed in the module housing; and A flexible circuit board, one end of which is electrically connected to the conductive bracket of the sound-generating device, and the other end of which is used to connect to an external power supply.

20. An electronic device, characterized in that: The electronic device comprises a sound-generating device according to any one of claims 1 to 18; Or, the electronic device includes the sound module as described in claim 19.

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