Sound production apparatus, sound production module and electronic device

Abstract

Disclosed in the present invention are a sound production apparatus, a sound production module and an electronic device. The sound production apparatus comprises a magnetic circuit system, an electrically conductive bracket and a vibration system, wherein the magnetic circuit system is provided with a mounting hole running through a magnetically conductive yoke and a central magnetic portion, and the electrically conductive bracket is arranged in the mounting hole; one end of a voice coil of the vibration system is connected to a diaphragm assembly, and the other end of the voice coil is arranged corresponding to a magnetic gap; one end of a spider is electrically connected to the electrically conductive bracket, and the other end of the spider is connected to the diaphragm assembly and is electrically connected to a lead wire of the voice coil; and the central magnetic portion comprises a central magnet and a central magnetically conductive plate arranged on a side of the central magnet opposite to the diaphragm assembly, the mounting hole runs through the central magnet and the central magnetically conductive plate, and the electrically conductive bracket is formed as an integral injection-molded structure with the central magnetically conductive plate or the magnetically conductive yoke. The present invention provides a sound production apparatus having an effectively increased magnetic circuit, and the sound production apparatus has a simple and compact structure, is easy to assemble, and has a low magnetic flux leakage to meet the use requirements. In addition, the product has a large BL value, thereby improving the acoustic performance.

Description

Sound-generating device, sound-generating module and electronic device 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, consumer electronics have experienced rapid growth, with smartphones, VR devices, and other electronic devices gaining widespread acceptance and adoption. Technicians in this field have also developed improvements to related ancillary 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 the related art, the sound-generating device usually adopts a centering support structure. By setting the centering support at the four corners of the sound-generating device or the short axis of the sound-generating device, part of the space is occupied, resulting in the size of the side magnets of the magnetic circuit system being limited and unable to be increased, resulting in low magnetic field utilization of the magnetic circuit system and reducing the BL value, thereby affecting the acoustic performance of the sound-generating device.

[0005] Summary of the Invention

[0006] 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 circuit. The sound-generating device has a simple and compact structure and is easy to assemble; the magnetic leakage is low and meets the use requirements. In addition, the BL value of the product is large, thereby improving the acoustic performance.

[0007] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0008] 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;

[0009] a conductive bracket, the conductive bracket being disposed in the mounting hole; and

[0010] a vibration system comprising a diaphragm assembly, a voice coil, and a centering support plate opposite the magnetic circuit system, one end of the voice coil being connected to the diaphragm assembly, the other end of the voice coil being disposed corresponding to the magnetic gap, one end of the centering support plate being electrically connected to the conductive bracket, the other end of the centering support plate being connected to the diaphragm assembly and electrically connected to a lead of the voice coil;

[0011] Among them, the central magnetic part includes a central magnet and a central magnetic conductive plate arranged on the side of the central magnet opposite to the diaphragm assembly, the mounting hole passes through the central magnet and the central magnetic conductive plate, and the conductive bracket and the central magnetic conductive plate or the magnetic conductive yoke form an integrated injection molding structure.

[0012] In one embodiment, the conductive bracket, the central magnetic conductive plate and the central magnet are formed into an integral injection-molded structure;

[0013] Alternatively, the conductive bracket, the magnetic yoke and the central magnet are formed into an integral injection-molded structure;

[0014] Alternatively, the conductive bracket, the magnetic yoke, the central magnet and the central magnetic plate are formed into an integral injection-molded structure.

[0015] In one embodiment, the edge magnetic portion includes an edge magnet and an edge magnetic conductive plate provided on the edge magnet;

[0016] The side magnets and / or the side magnetic conductive plates form a closed integral ring structure; or, the side magnets and the side magnetic conductive plates are both multiple and arranged in one-to-one correspondence, and adjacent side magnets are connected end to end to form a closed ring structure.

[0017] In one embodiment, a limiting hole is formed between the conductive bracket and the hole wall of the mounting hole;

[0018] The magnetic circuit system further includes an auxiliary magnet, which is disposed in the limiting hole, and at least a portion of the auxiliary magnet is disposed corresponding to the centering support piece.

[0019] In one embodiment, the auxiliary magnet and the central magnet are integrally formed; or, the auxiliary magnet and the central magnet are bonded together;

[0020] And / or, the distance between the auxiliary magnet and the diaphragm assembly is greater than the distance between the central magnet and the diaphragm assembly;

[0021] And / or, the auxiliary magnet is arranged in a ring shape; or, the auxiliary magnet includes a plurality of auxiliary magnets, and the plurality of auxiliary magnets are arranged at intervals and surround the conductive bracket;

[0022] And / or, a portion of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly to form a relief area, one end of the relief area is connected to the mounting hole, and the other end of the relief area extends toward a periphery of the central magnetic conductive plate, and the relief area is arranged corresponding to the lead of the voice coil and / or the centering support plate;

[0023] And / or, the central magnet is arranged in an annular shape; or, the central magnet includes a plurality of central magnets, and the plurality of central magnets are arranged in an annular shape to form the mounting hole;

[0024] And / or, the central magnetic conductive plate is arranged in an integral ring shape; or, the central magnetic conductive plate includes a plurality of central magnetic conductive plates, and the plurality of central magnetic conductive plates are arranged in an annular shape to form the mounting hole;

[0025] And / or, a positioning boss is provided on a side of the conductive bracket facing away from the centering support plate, and the positioning boss is in positioning contact with a side of the central magnet facing away from the central magnetic conductive plate.

[0026] In one embodiment, the magnetic yoke is provided with a positioning platform adjacent to the mounting hole;

[0027] The positioning platform is formed by bending a side of the magnetic yoke adjacent to the mounting hole; or, the positioning platform and the magnetic yoke are formed as a separate structure;

[0028] And / or, the positioning platform is an annular boss arranged around the mounting hole; or, the positioning platform includes a plurality of positioning platforms, and the plurality of positioning platforms are arranged at intervals along the periphery of the mounting hole.

[0029] In one embodiment, a press groove is further provided on a side of the magnetic yoke facing away from the diaphragm assembly, one end of the press groove is connected to the mounting hole, and the other end of the press groove extends toward the periphery of the magnetic yoke, and the press groove is used to avoid wiring. There are one or more press grooves. When there are multiple press grooves, the multiple press grooves are arranged at intervals; and / or the multiple press grooves are symmetrically arranged with respect to the mounting hole; and / or the multiple press grooves are radially arranged with the mounting hole as the center.

[0030] And / or, a circumference of the magnetic yoke is further provided with an avoidance gap, and an end of the pressing groove away from the mounting hole is connected to the avoidance gap.

[0031] In one embodiment, the conductive bracket is provided with a first welding surface and a second welding surface which are arranged in opposite directions, the first welding surface is arranged to face the centering support piece and is connected to the centering support piece, and the second welding surface is used to connect to an external power supply;

[0032] Wherein, the first welding surface is not higher than a side surface of the central magnetic portion facing the diaphragm assembly.

[0033] In one embodiment, a groove is provided on a side of the conductive bracket facing away from the first welding surface, and a bottom wall of the groove forms the second welding surface;

[0034] And / or, the conductive bracket includes a main body and a pad piece, the pad piece is embedded in the main body, the pad piece includes a first pad portion and a second pad portion connected to each other, at least part of the first pad portion is exposed on the first welding surface, and at least part of the second pad portion is exposed on the second welding surface.

[0035] In one embodiment, the centering supports include a plurality of support plates, one end of each of the plurality of support plates is connected to the conductive bracket, and the other ends of each of the plurality of support plates are connected to the diaphragm assembly and are electrically connected to the leads of the voice coil.

[0036] Each of the centering supports includes a first connecting portion, an elastic arm, and a second connecting portion connected in sequence. The first connecting portion is connected to the diaphragm assembly and electrically connected to the lead of the voice coil. The second connecting portion is connected to the conductive bracket.

[0037] In one embodiment, the plurality of centering arms are correspondingly distributed along the major axis direction and / or minor axis direction of the magnetic circuit system and / or at diagonal positions or four corners of the magnetic circuit system;

[0038] And / or, the first connection portion and the second connection portion are located in different planes;

[0039] And / or, the first connecting portion, the elastic arm and the second connecting portion are an integrally formed structure;

[0040] And / or, the elastic arm has at least one bend;

[0041] And / or, the centering supports include two, and the two second connecting portions are an integrally formed structure, so that the two centering supports are connected as one.

[0042] In one embodiment, the diaphragm assembly includes:

[0043] a diaphragm, the diaphragm being arranged opposite to the magnetic circuit system, and having an inner ring hole at the center thereof;

[0044] A skeleton, the skeleton is arranged in the inner ring hole and connected to the diaphragm, the centering support is connected to the skeleton, and the skeleton is provided with an assembly hole corresponding to the conductive bracket; and

[0045] A spherical top, wherein the spherical top cover is arranged on the assembly hole;

[0046] Wherein, the voice coil is connected to the diaphragm or the skeleton.

[0047] In one embodiment, the skeleton is further provided with a connecting platform adjacent to the assembly hole and extending toward the installation hole, and one end of the centering support piece away from the conductive bracket is connected to the connecting platform.

[0048] In one embodiment, the connecting platform is formed by bending or stretching a side of the frame adjacent to the assembly hole;

[0049] And / or, the connecting platform is an annular boss arranged around the assembly hole; or, the connecting platform includes multiple, and the multiple connecting platforms are arranged at intervals along the circumference of the assembly hole; or, the connecting platform includes two, and the two connecting platforms are respectively arranged corresponding to the major axis direction, minor axis direction or diagonal direction of the magnetic circuit system.

[0050] The present invention further provides a sound module, comprising:

[0051] module housing;

[0052] The sound-generating device described above is disposed in the module housing; and

[0053] 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.

[0054] In one embodiment, a positioning ear is provided at one end of the flexible circuit board adjacent to the conductive bracket, and the conductive bracket is formed with a positioning side wall that is positioned and matched with the positioning ear;

[0055] And / or, the conductive bracket is further provided with a clearance gap corresponding to the flexible circuit board.

[0056] The present invention also provides an electronic device, comprising the above-mentioned sound-generating device;

[0057] Alternatively, the electronic device includes the sound module described above.

[0058] The sound-generating device of the technical solution of the present invention sets the magnetic circuit system as a magnetic yoke and a central magnetic part and a side magnetic part provided on the magnetic yoke, so that the side magnetic part is located on the outside of the central magnetic part and encloses the central magnetic part to form a magnetic gap, and sets the vibration system 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 arranging 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 electrically connected to the welding pad of the conductive bracket. One end 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 not only realize the installation and fixation of the centering support plate, but also enable the voice coil to be connected to the external circuit through the centering support plate and the conductive bracket. At the same time, the centering support plate can also effectively prevent the voice coil from swinging or polarizing, thereby improving the acoustic performance of the sound-emitting device. By arranging a mounting hole at the central position where the magnetic field utilization rate of the central magnetic part of the magnetic circuit system is not high, it is possible to achieve weight reduction and the installation and fixation of the conductive bracket. Moreover, since the centering support plate is arranged in the mounting hole in the middle of the central magnetic part, the centering support plate will not occupy the setting space of the side magnetic part, so that the setting volume of the side magnetic part can be increased, the magnetic field strength of the magnetic circuit system can be improved, and then the BL value can be improved, thereby improving the acoustic performance of the sound-emitting device. Furthermore, due to the significant magnetic flux leakage at the center of the central magnetic portion, the mounting hole is formed by removing at least a portion of the central magnet at the center of the central magnetic portion. This reduces the magnetic flux leakage of the central magnet. When the sound-generating device is assembled into an electronic device, the impact of magnetic flux leakage from the central magnet in the sound-generating device on the performance of the electronic device can be reduced, thereby meeting the magnetic flux leakage requirements of the electronic device. Furthermore, by forming the conductive bracket and the central magnetic plate or yoke into an integral injection-molded structure, the assembly process of the sound-generating device is effectively simplified, improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] 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.

[0060] FIG1 is a schematic structural diagram of a sound-generating device according to an embodiment of the present invention;

[0061] FIG2 is a schematic structural diagram of a sound-generating device from another perspective according to an embodiment of the present invention;

[0062] FIG3 is an exploded schematic diagram of a sound-generating device according to an embodiment of the present invention;

[0063] FIG4 is a schematic cross-sectional view of a sound-generating device along the long axis in one embodiment of the present invention;

[0064] FIG5 is a schematic cross-sectional view of a sound-generating device along the minor axis in one embodiment of the present invention;

[0065] FIG6 is a schematic structural diagram of an integral injection molding of a central magnetic portion and a conductive bracket in one embodiment of the present invention;

[0066] FIG7 is a structural diagram showing another perspective of the central magnetic portion and the conductive bracket being integrally injection-molded in one embodiment of the present invention;

[0067] FIG8 is a cross-sectional view of an integral injection molding of a central magnetic portion and a conductive bracket in one embodiment of the present invention;

[0068] FIG9 is a schematic structural diagram of an integral injection molding of a conductive bracket, a central magnetic portion, and a magnetic yoke in one embodiment of the present invention;

[0069] FIG10 is a schematic structural diagram of another perspective of an embodiment of the present invention, wherein the conductive bracket, the central magnetic portion, and the magnetic yoke are integrally molded;

[0070] FIG11 is a cross-sectional view of an embodiment of the present invention showing a conductive bracket, a central magnetic portion, and a magnetic yoke integrally injection-molded;

[0071] FIG12 is a schematic structural diagram of an integral injection molding of a conductive bracket and a magnetic yoke in one embodiment of the present invention;

[0072] FIG13 is a cross-sectional view of an integrally-injected conductive bracket and a magnetic yoke according to an embodiment of the present invention;

[0073] FIG14 is a schematic structural diagram of a sound module according to an embodiment of the present invention.

[0074] Description of Figure Numbers:

[0075] 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

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] The present invention provides a sound-generating device 100. It is understandable that the sound-generating device 100 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, speakers, computers, headphones, or televisions, etc., which are not limited here.

[0081] 1 to 13 , 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. 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 that passes 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 support plate opposite to the magnetic circuit system 2. 43, one end of the voice coil 42 is connected to the diaphragm assembly 41, and the other end of the voice coil 42 is arranged corresponding to the magnetic gap 24, one end of the centering support plate 43 is electrically connected to the conductive bracket 3, and the other end of the centering support plate 43 is connected to the diaphragm assembly 41 and electrically connected to the lead of the voice coil 42; wherein, the central magnetic portion 22 includes a central magnet 221 and a central magnetic plate 222 arranged on the side opposite to the central magnet 221 and the diaphragm assembly 41, the mounting hole 25 passes through the central magnet 221 and the central magnetic plate 222, and the conductive bracket 3 and the central magnetic plate 222 or the magnetic yoke 21 form an integral injection molded structure.

[0082] In this embodiment, the sound-emitting device 100 can be a sound-emitting unit of a loudspeaker, and the loudspeaker can be a micro-loudspeaker. It should be noted that the magnetic circuit system 2 and the vibration system 4 of the sound-emitting device 100 are arranged relative to each other. Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 can include a central magnetic portion 22 and a side magnetic portion 23, both of which are square structures. The vibration system 4 is also arranged in a square shape. It can be understood that the periphery of the diaphragm assembly 41 of the vibration system 4 can be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 4 can be respectively assembled on the module shell, etc., which is not limited here.

[0083] 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 shown in Figures 1 to 5, the sound-generating device 100 further includes a housing 1, the magnetic circuit system 2 is connected to one end of the housing 1, and the vibration system 4 is connected to the other end of the housing 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 housing 1 and is arranged opposite to the magnetic circuit system 2.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] It will be appreciated that by configuring the magnetic circuit system 2 as a magnetic yoke 21 with a central magnetic portion 22 and side magnetic portions 23 disposed thereon, 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 portions 23, without limitation. In this embodiment, the side magnetic portions 23 are located outside the central magnetic portion 22 and, together with the central magnetic portion 22, form a magnetic gap 24. This allows the diaphragm assembly 41 of the vibration system 4 to be connected to the housing 1 at an end away from the magnetic yoke 21, and to be opposite and spaced from the magnetic circuit system 2. This allows one end of the voice coil 42 to be connected to the diaphragm assembly 41, while the other end of the voice coil 42 is suspended within the magnetic gap 24. Of course, the other end of the voice coil 42 can also be located outside the magnetic gap 24, with the other end of the voice coil 42 disposed opposite the magnetic gap 24 along the vibration direction of the vibration system 4.

[0088] In order to achieve electrical connection between the voice coil 42 and the external circuit, the sound-emitting device 100 in the related art usually adopts a centering support structure, and the two ends of the centering support 43 are electrically connected to the voice coil 42 lead and the external circuit respectively. By setting the centering support 43 at the four corners of the sound-emitting device 100 or the short axis of the sound-emitting device 100, that is, setting avoidance space at the four corners or short axis of the magnetic circuit system 2 to provide installation space or installation position for the centering support 43, the centering support 43 will occupy part of the space of the magnetic circuit system 2, resulting in the side magnet size of the magnetic circuit system 2 being limited and unable to be increased, resulting in the magnetic field strength of the magnetic circuit system 2 being not high, reducing the BL value, and thus affecting the acoustic performance of the sound-emitting device 100.

[0089] 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.

[0090] It can be understood 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 at the central position of the magnetic circuit system 2, that is, setting a mounting hole 25 at the central position of the magnetic circuit system 2 where the magnetic field utilization rate of the central magnetic part 22 is not high, the weight can be reduced and the installation and fixation of the conductive bracket 3 can be achieved under the premise of little impact on the magnetic field strength of the magnetic circuit system 2. Moreover, since the centering support piece 43 is set in the mounting hole 25 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, so that the side magnetic part 23 can increase the setting volume, the magnetic field strength of the magnetic circuit system 2 can be improved, and the BL value can be improved, thereby improving the acoustic performance of the sound-generating device 100. In addition, due to the serious magnetic leakage at the central position of the central magnetic portion 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 at the central position of the central magnetic portion 22, thereby reducing the 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.

[0091] In this embodiment, 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 configuration is selected based on actual needs and is not limited here. It can be understood that 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 and the third through-hole of the magnetic yoke 21 are connected to form the mounting hole 25.

[0092] In order to simplify the assembly process of the sound-generating device 100 and improve assembly efficiency, in this embodiment, the conductive bracket 3 and the central magnetic plate 222 or the magnetic yoke 21 are formed into an integral injection-molded structure. That is, the conductive bracket 3 can be formed into an integral injection-molded structure with the central magnetic plate 222; the conductive bracket 3 can also be formed into an integral injection-molded structure with the magnetic yoke 21. It can be understood that the central magnetic portion 22 includes a central magnet 221 and a central magnetic plate 222 that are stacked, and the central magnet 221 is sandwiched between the central magnetic plate 222 and the magnetic yoke 21. The mounting hole 25 passes through the magnetic yoke 21, the central magnet 221 and the central magnetic plate 222 in sequence, wherein the conductive bracket 3 and the central magnetic plate 222 and / or the central magnet 221 are formed into an integral injection-molded structure.

[0093] In this embodiment, as shown in Figures 3 to 9, the central magnetic portion 22 is arranged as a stacked central magnet 221 and a central magnetic plate 222, so that the central magnet 221 is sandwiched between the central magnetic plate 222 and the magnetic yoke 21, and the mounting hole 25 passes through the magnetic yoke 21, the central magnet 221 and the central magnetic plate 222 in sequence. In this way, the mounting hole 25 can be effectively utilized to reduce the weight of the central magnetic portion 22. Since the magnet in the middle position of the central magnetic portion 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.

[0094] As can be understood, the central magnetic plate 222 forms a first through hole, the central 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 sequentially connected to form a mounting hole 25. It should be noted that due to the serious magnetic flux leakage at the central position of the central magnetic portion 22, the mounting hole 25 needs to be formed by removing at least a portion of the central magnet 221 at the central position of the central magnetic portion 22. This can reduce the magnetic flux leakage of the central magnet 221. When the sound-generating device 100 is assembled in an electronic device, the impact of the magnetic flux leakage of the central magnet 221 in the sound-generating device 100 on the performance of the electronic device can be reduced, thereby meeting the magnetic flux leakage requirements of the electronic device.

[0095] In one embodiment, the conductive bracket 3 is formed into an integral injection-molded structure with the central magnetic plate 222 and the central magnet 221. It is understood that by integrally injecting the conductive bracket 3, the central magnetic plate 222 and the central magnet 221 to form an integral injection-molded structure, the conductive bracket 3 and the central magnetic portion 22 can be assembled as one integrated component, effectively simplifying the assembly process and improving assembly efficiency.

[0096] Of course, in other embodiments, the conductive bracket 3 may be formed into an integral injection-molded structure with the magnetic yoke 21 and the central magnet 221; or the conductive bracket 3 may be formed into an integral injection-molded structure with the magnetic yoke 21, the central magnet 221, and the central magnetic plate 222. In this way, the conductive bracket 3, the central magnetic portion 22 of the magnetic circuit system 2, and the magnetic yoke 21 are assembled as a single integrated component, effectively simplifying the assembly process and improving assembly efficiency.

[0097] 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.

[0098] It is understandable that the center magnet 221 can optionally be arranged in an annular shape, that is, the center magnet 221 is arranged in an integral 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 multiple center magnets 221 are arranged in an annular shape to form the mounting hole 25, that is, multiple center magnets 221 are arranged in an annular shape to form the second through hole. The center magnetic conductive plate 222 is arranged in an integral annular shape, so that a first through hole is formed in the center of the center magnetic conductive plate 222. Of course, in other embodiments, the center magnetic conductive plate 222 includes multiple center magnetic conductive plates 222, and multiple center magnetic conductive plates 222 are arranged in an annular shape to form the mounting hole 25, that is, multiple center magnetic conductive plates 222 are arranged in an annular shape to form the first through hole, which is not limited here.

[0099] The sound-generating device 100 of the present invention is configured by providing the magnetic circuit system 2 with 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 encloses the central magnetic portion 22 to form a magnetic gap 24, and the vibration system 4 is configured as a diaphragm assembly 41, a voice coil 42 and a centering support plate 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, so that current is passed through the voice coil 42, so that the voice coil 42 converts electrical energy into mechanical energy in the magnetic gap 24 formed by the magnetic circuit system 2, thereby driving the voice coil 42 to drive the diaphragm assembly 41 to vibrate, thereby achieving sound generation; 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 providing a conductive bracket 3 in the mounting hole 25, so that one end of the centering support plate 43 is electrically connected to the welding pad of the conductive bracket 3. Then, the other end of the centering support piece 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 realize the installation and fixation of the centering support piece 43, but also enable the voice coil 42 to be connected to the external circuit through the centering support piece 43 and the conductive bracket 3. At the same time, the centering support piece 43 can also effectively prevent the voice coil 42 from swinging or polarizing, thereby improving the acoustic performance of the sound-emitting device 100. By providing a mounting hole 25 at the central position of the central magnetic part 22 in the magnetic circuit system 2 where the magnetic field utilization rate is not high, both weight reduction and installation and fixation of the conductive bracket 3 can be achieved. Moreover, since the centering support piece 43 is provided in the mounting hole 25 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, so that the side magnetic part 23 can increase the setting volume, the magnetic field strength of the magnetic circuit system 2 can be improved, and the BL value can be improved, thereby improving the acoustic performance of the sound-emitting device 100. Furthermore, due to the significant magnetic flux leakage at the center of the central magnetic portion 22, the mounting hole 25 is formed by removing at least a portion of the central magnet 221 at the center of the central magnetic portion 22. This reduces the magnetic flux leakage from the central magnet 221. When the sound-generating device 100 is assembled into an electronic device, the impact of magnetic flux leakage from the central magnet 221 in the sound-generating device 100 on the performance of the electronic device can be reduced, thereby meeting the magnetic flux leakage requirements of the electronic device. Furthermore, by forming the conductive bracket 3 and the central magnetic plate 222 or the magnetic yoke 21 into an integral injection-molded structure, the assembly process of the sound-generating device 100 is effectively simplified, improving assembly efficiency.

[0100] In one embodiment, the side magnet portion 23 includes side magnets 231 and side magnetic conductive plates 232 disposed on the side magnets 231. As will be appreciated, as shown in Figures 3 to 5 , the side magnets 231 and side magnetic conductive plates 232 of the side magnet portion 23 are stacked on the magnetic yoke 21, with the side magnets 231 sandwiched between the side magnetic conductive plates 232 and the magnetic yoke 21. The side magnets 231 and side magnetic conductive plates 232 of the side magnet portion 23 are located outside the central magnetic portion 22 and are separated to form a magnetic gap 24.

[0101] In one embodiment, the side magnet portion 23 may be annular in 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. Optionally, the side magnets 231 and / or the side magnetic conductive plates 232 form a closed, integrated annular structure.

[0102] Of course, in other embodiments, the edge magnetic portion 23 includes a plurality of edge magnetic portions 23, and the plurality of 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. Optionally, both the edge magnets 231 and the edge magnetic conductive plates 232 are multiple, and are arranged one-to-one, and adjacent edge magnets 231 are connected end to end to form a closed annular structure. Alternatively, the edge magnets 231 form a closed integral annular structure, the edge magnetic conductive plates 232 are multiple, and adjacent edge magnetic conductive plates 232 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnets 231; or, the edge magnetic conductive plates 232 form a closed integral annular structure, the edge magnets 231 are multiple, and adjacent edge magnets 231 are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnetic conductive plates 232. This is not limited here.

[0103] It should be noted that the centering support plate 43 in the present invention is arranged 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 edge magnetic part 23. There is no need to set up a accommodating space for the centering support plate 43 between two adjacent edge magnets 231, so that the edge magnets 231 can be set into a closed ring structure, thereby increasing the setting volume of the edge magnets 231, improving the magnetic field strength of the magnetic circuit system 2, and then improving the BL value.

[0104] In one embodiment, a limiting hole 26 is formed between the conductive bracket 3 and the hole wall of the mounting hole 25; the magnetic circuit system 2 also includes an auxiliary magnet 27, which is arranged in the limiting hole 26, and at least part of the auxiliary magnet 27 is arranged corresponding to the centering support piece 43.

[0105] In this embodiment, as shown in Figures 3 and 4, the auxiliary magnet 27 is disposed within the mounting hole 25 and between the central magnet 221 and the conductive bracket 3. At least a portion of the auxiliary magnet 27 is disposed corresponding to the centering support piece 43. It will be appreciated that the conductive bracket 3 is disposed within the mounting hole 25 such that a retaining hole 26 is formed between a portion of the outer wall of the conductive bracket 3 and the wall of the mounting hole 25. The retaining hole 26 thus provides space for the auxiliary magnet 27 to be installed, fixed, and positioned.

[0106] In this embodiment, an auxiliary magnet 27 is provided so that the auxiliary magnet 27 is provided on the magnetic yoke 21 and is located between the central magnet 221 and the conductive bracket 3, thereby effectively increasing the magnet volume of the central magnetic part 22 and improving the magnetic field strength of the magnetic field to a certain extent, so that the auxiliary magnet 27 makes full use of the space in the mounting hole 25 of the central magnetic part 22 and improves the acoustic performance.

[0107] It should be noted that the provision of auxiliary magnets 27 not only increases the magnet volume of the central magnetic portion 22, thus improving acoustic performance, but also aligns at least some of the auxiliary magnets 27 with the centering support 43, utilizing the height difference between the auxiliary magnets 27 and the central magnetic plate 222 of the central magnetic portion 22 to provide clearance or vibration space for the centering support 43. Optionally, the distance between the auxiliary magnets 27 and the diaphragm assembly 41 is greater than the distance between the central magnets 221 and the diaphragm assembly 41. This effectively ensures sufficient vibration space for the centering support 43.

[0108] Optionally, the auxiliary magnet 27 and the central magnet 221 are integrally formed. Of course, in other embodiments, the auxiliary magnet 27 and the central magnet 221 are bonded and connected, which is not limited here.

[0109] In this embodiment, the auxiliary magnet 27 is arranged in an annular shape, that is, the annular auxiliary magnet 27 is arranged around the conductive bracket 3. At this time, the central magnet 221 of the central magnetic portion 22 is connected to the auxiliary magnet 27, so that the auxiliary magnet 27 surrounds the mounting hole 25. Of course, in other embodiments, the auxiliary magnet 27 includes multiple auxiliary magnets 27, and the multiple auxiliary magnets 27 are arranged at intervals and arranged around the conductive bracket 3. Optionally, there are two or four auxiliary magnets 27, etc., which is not limited here.

[0110] To further enhance the mounting stability of the auxiliary magnet 27 and to position the auxiliary magnet 27, in one embodiment, a mounting groove is provided on the side of the central magnet 221 and / or the conductive bracket 3 facing the auxiliary magnet 27, and at least a portion of the auxiliary magnet 27 is retained within the mounting groove. It will be appreciated that by providing the mounting groove on the central magnet 221 and / or the conductive bracket 3, the auxiliary magnet 27 is mounted and secured therein, thereby achieving the installation, securing, and position-limiting functions of the auxiliary magnet 27 and improving mounting stability.

[0111] It can be understood that the mounting groove can be set on the side of the central magnet 221 facing the auxiliary magnet 27; or, the mounting groove can be set on the side of the conductive bracket 3 facing the auxiliary magnet 27; or, both the side of the central magnet 221 facing the auxiliary magnet 27 and the side of the conductive bracket 3 facing the auxiliary magnet 27 are provided with mounting grooves.

[0112] In one embodiment, a portion of the central magnetic conductive plate 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 mounting hole 25, and the other end of the avoidance area 223 extends toward the periphery of the central magnetic conductive plate 222. The avoidance area 223 is arranged corresponding to the lead wire and / or centering support plate 43 of the voice coil 42.

[0113] In this embodiment, as shown in Figures 3 and 6, an avoidance area 223 is provided on the central magnetic conductive plate 222, so that one end of the avoidance area 223 is connected to the mounting hole 25, and the other end of the avoidance area 223 extends toward the periphery of the central magnetic conductive plate 222, so that the avoidance area 223 is arranged corresponding to the lead wire of the voice coil 42 and / or the centering support plate 43, thereby providing an avoidance space for the vibration of the lead wire of the voice coil 42 and / or the centering support plate 43.

[0114] It is understandable that the avoidance area 223 can be a through hole or notch structure penetrating the central magnetic conductive plate 222. Of course, the avoidance area 223 can also be a groove structure formed by the central magnetic conductive plate 222 being recessed in a direction away from the diaphragm assembly 41, which is not limited here.

[0115] In one embodiment, a positioning boss 311 is provided on a side of the conductive bracket 3 facing away from the centering support piece 43 . The positioning boss 311 is positioned and abutted against a side of the central magnet 221 facing away from the central magnetic conductive plate 222 .

[0116] In this embodiment, as shown in Figures 5, 7, 8 and 11, a positioning boss 311 is provided on the periphery of the conductive bracket 3, so that when the conductive bracket 3 is installed in the mounting hole 25, the positioning boss 311 is used to position and abut against the side of the center magnet 221 facing away from the center magnetic plate 222, so as to achieve limited installation of the conductive bracket 3 and improve the assembly firmness of the conductive bracket 3.

[0117] In the specific embodiments shown in Figures 3 and 11 to 14 , a third through-hole is defined in the magnetic yoke 21, through which the conductive bracket 3 extends into the sound-generating device 100. The conductive bracket 3 has a first sidewall and a second sidewall disposed opposite each other, one of which is provided with a positioning boss 311. The positioning boss 311 is positioned and abutted against the side of the central magnet 221 facing away from the central magnetic plate 222, while the other of the first sidewall and the second sidewall abuts or has a clearance fit with the inner wall of the third through-hole.

[0118] In one embodiment, a positioning platform 211 is provided adjacent to the mounting hole 25 of the magnetic yoke 21. The positioning platform 211 is connected to the conductive bracket 3. In this embodiment, as shown in Figures 5, 11, and 13, the positioning platform 211 is provided on the magnetic yoke 21, thereby further installing, fixing, and positioning the conductive bracket 3.

[0119] It is understood that the positioning platform 211 is provided adjacent to the mounting hole 25. Optionally, the positioning platform 211 may be a protrusion extending toward a side of the diaphragm assembly 41; or, the positioning platform 211 may be a protrusion extending toward a side away from the diaphragm assembly 41, which is not limited here.

[0120] In this embodiment, a positioning platform 211 is optionally located between the central magnetic portion 22 and the conductive bracket 3. As will be appreciated, the positioning platform 211 extends and protrudes toward one side of the diaphragm assembly 41. This ensures that the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 is flat, facilitating assembly of the sound-generating device 100 in an electronic device. Furthermore, the positioning platform 211 can be used to position and limit the central magnetic portion 22 and the conductive bracket 3.

[0121] In one embodiment, the positioning platform 211 is formed by bending the side of the magnetic yoke 21 adjacent to the mounting hole 25. Specifically, the positioning platform 211 is formed by bending the side of the magnetic yoke 21 adjacent to the third through hole. It is understood that the positioning platform 211 and the magnetic yoke 21 are integrally formed, which simplifies the processing steps of the magnetic yoke 21 and improves the structural strength of the positioning platform 211. Of course, in other embodiments, the positioning platform 211 and the magnetic yoke 21 can also be separate components, with the positioning platform 211 connected to the magnetic yoke 21 by welding or gluing, which is not limited here.

[0122] Optionally, the positioning platform 211 is an annular boss arranged around the mounting hole 25. Such an arrangement can effectively increase the contact area between the positioning platform 211 and the conductive bracket 3, thereby improving the installation stability. Of course, in other embodiments, the positioning platform 211 includes multiple positioning platforms 211, and the multiple positioning platforms 211 are arranged at intervals along the periphery of the mounting hole 25. It can be understood that the spacing between two adjacent positioning platforms 211 can not only reduce costs, but also achieve the installation, fixation and positioning of the conductive bracket 3. Of course, in other embodiments, the positioning platform 211 and the magnetic yoke 21 can also be formed as a split structure, which is not limited here.

[0123] Optionally, the positioning platform 211 is located between the central magnetic portion 22 and the conductive bracket 3. It should be noted that the positioning platform 211 can also be provided between the conductive bracket 3 and the central magnet 221. This can not only improve the connection stability between the magnetic yoke 21 and the central magnetic portion 22, but also facilitate the fixed positioning of the conductive bracket 3 on both sides of the magnetic yoke 21 and the central magnetic portion 22. It is understandable that the positioning platform 211 is formed by extending from the side of the magnetic yoke 21 adjacent to the mounting hole 25 toward the center of the mounting hole 25 (the third through hole), and is not limited here.

[0124] In one embodiment, the positioning platform 211 includes a first positioning portion and a second positioning portion arranged at an angle, the end of the first positioning portion away from the second positioning portion is connected to the magnetic yoke 21, and the second positioning portion extends in a direction away from the central magnetic portion 22. The conductive bracket 3 is provided with a limit platform, which is limitedly connected to the second positioning portion.

[0125] It can be understood that by setting the positioning platform 211 as an inverted L-shaped mechanism, the first positioning part and the second positioning part of the positioning platform 211 cooperate to form a limiting step structure, and a limiting platform is set on the conductive bracket 3, so that the limiting step structure formed by the cooperation of the first positioning part and the second positioning part is used to realize the limiting installation of the limiting platform of the conductive bracket 3. In this way, the installation and fixation of the conductive bracket 3 can be realized, and the installation position and installation height of the conductive bracket 3 can be ensured, thereby avoiding displacement of the conductive bracket 3.

[0126] Optionally, the mounting hole 25 is arranged in a square hole. It is understandable that the positioning platform 211 includes two or four. In this embodiment, the positioning platform 211 includes two, and the two positioning platforms 211 are arranged oppositely and correspond to two opposite edges of the mounting hole 25 respectively, which is not limited here.

[0127] In one embodiment, the conductive bracket 3 is further provided with a space-avoiding groove corresponding to the positioning platform 211 , and the positioning platform 211 is accommodated in the space-avoiding groove.

[0128] In this embodiment, as shown in FIG11 , a clearance groove is provided on the conductive bracket 3 , thereby utilizing the clearance groove to cooperate with the positioning platform 211 to achieve positioning assembly, while increasing the contact area between the conductive bracket 3 and the positioning platform 211 and improving installation stability.

[0129] 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.

[0130] In this embodiment, as shown in Figures 2, 10, and 14, a press groove 212 is provided on the magnetic yoke 21, so that one end of the press groove 212 is connected to the mounting hole 25, and the other end of the press groove 212 extends toward the periphery of the magnetic yoke 21, so that the press groove 212 is conveniently used for avoiding wiring.

[0131] 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 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. In this embodiment, the groove 212 is formed by a depression on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41.

[0132] Optionally, there are one or more pressing grooves 212. When there are multiple pressing grooves 212, the multiple pressing grooves 212 are spaced apart. In this embodiment, one end of the multiple pressing grooves 212 is connected to the mounting hole 25, and the other end of the multiple pressing grooves 212 extends toward the periphery of the guide yoke 21 and is spaced apart.

[0133] 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.

[0134] 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 .

[0135] In this embodiment, as shown in Figures 2, 3, 9, 10, and 12 to 14, an avoidance notch 213 is provided on the periphery of the magnetic yoke 21, so that the end of the pressing groove 212 away from the mounting hole 25 is connected to the avoidance notch 213. In this way, the avoidance notch 213 can be used to further limit the assembly of structures such as conductive circuits or flexible circuit boards, thereby realizing directional wiring installation.

[0136] In one embodiment, the sound-generating device 100 further includes a connecting bracket disposed in the mounting hole 25. The connecting bracket defines a fixing cavity, and the conductive bracket 3 is disposed within the fixing cavity. It will be appreciated that by providing the connecting bracket, the conductive bracket 3 is fixedly mounted in the mounting hole 25 via the connecting bracket, thereby further improving the installation stability and structural strength of the conductive bracket 3.

[0137] Optionally, the connecting bracket is a metal stamping. It is understood that the shape and profile of the connecting bracket are roughly equivalent to those of the conductive bracket 3. Of course, to facilitate the integral injection molding of the conductive bracket 3 with the central magnetic portion 22 and / or the magnetic yoke 21, the connecting bracket can also be embedded in the conductive bracket 3, which is not limited here.

[0138] In one embodiment, a support groove is formed on a side of the magnetic yoke 21 facing away from the diaphragm assembly 41 and surrounding the mounting hole 25 , and a portion of the conductive bracket 3 is accommodated and confined in the support groove.

[0139] Of course, in other embodiments, the connecting bracket includes a main body and a support surrounding the main body, the main body having a fixing cavity, the main body being passed through the mounting hole 25, and the support being received and restrained within the support groove. It is understood that by providing a recessed support groove on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41, with the mounting hole 25 extending through the bottom wall of the support groove, the supporting groove is utilized to support and restrain the connecting bracket.

[0140] It is understood that the main body and support of the connecting bracket can be formed as an integral structure, which can not only simplify the processing steps of the connecting bracket, but also improve the structural strength of the connecting bracket. Optionally, the support is arranged around the periphery of the main body, so that when the main body of the connecting bracket is inserted into the mounting hole 25, the support is limited to the support groove. In this embodiment, the fixing cavity of the connecting bracket can be a cavity structure with openings at both ends, which can facilitate the installation of the conductive bracket 3 and facilitate the connection of the conductive bracket 3 with the external circuit.

[0141] In this embodiment, the pressing groove 212 on the side of the magnetic yoke 21 facing away from the diaphragm assembly 41 is connected to the supporting groove, thereby providing installation and limiting space for the conductive circuit or flexible circuit board used to connect the conductive bracket 3 and the external circuit.

[0142] In one embodiment, the connecting bracket further includes a clearance notch that connects to the fixing cavity and is used to provide space for wiring. As will be appreciated, this arrangement allows the clearance notch to provide installation and positioning space for the conductive circuitry or flexible printed circuit board used to connect the conductive bracket 3 to the external circuit, preventing the conductive circuitry or flexible printed circuit board from protruding from the side of the magnetic yoke 21 facing away from the diaphragm assembly 41, thereby making the overall structure more compact.

[0143] In one embodiment, the conductive bracket 3 is provided with a first welding surface and a second welding surface which are arranged in opposite directions. The first welding surface is arranged facing the centering support plate 43 and is connected to the centering support plate 43. The second welding surface is used to connect to an external power supply. The first welding surface is not higher than the side surface of the central magnetic portion 22 facing the diaphragm assembly 41.

[0144] In this embodiment, as shown in Figures 2 to 13, a first welding surface is formed on the side of the conductive bracket 3 facing the centering support plate 43, and a second welding surface is provided on the side of the conductive bracket 3 facing away from the first welding surface. In this way, the first welding surface can be used to connect and conduct with the centering support plate 43, and the second welding surface can be used to connect to an external power supply, so that the conductive bracket 3 connects and conducts the external circuit with the centering support plate 43 to supply power to the voice coil 42.

[0145] Optionally, the first welding surface is no higher than the side surface of the central magnetic portion 22 facing the diaphragm assembly 41. It can be understood that such a configuration can facilitate the installation of the centering support 43 without affecting the diaphragm assembly 41, and can also ensure that the centering support 43 has sufficient vibration space during the vibration process.

[0146] In one embodiment, a groove 312 is provided on a side of the conductive bracket 3 facing away from the first welding surface, and a bottom wall of the groove 312 forms the second welding surface.

[0147] In this embodiment, as shown in Figures 2, 4, 5, 7, 8, 10, 11, and 14, a groove 312 is provided on the side of the conductive bracket 3 facing away from the first welding surface, so that the bottom wall of the groove 312 forms a second welding surface, thereby providing an installation space for the conductive circuit or flexible circuit board used to connect the conductive bracket 3, and protecting the conductive circuit or the flexible circuit board.

[0148] In one embodiment, the conductive bracket 3 includes a main body 31 and a pad piece 32, the pad piece 32 is embedded in the main body 31, and the pad piece 32 includes a first pad portion 321 and a second pad portion 322 connected to each other, at least a portion of the first pad portion 321 is exposed on the first welding surface, and at least a portion of the second pad portion 322 is exposed on the second welding surface.

[0149] In this embodiment, as shown in Figures 5, 8, and 11, the main body 31 of the conductive bracket 3 can be a plastic part, and the pad 32 can be a metal conductive part. The pad 32 and the main body 31 of the conductive bracket 3 can be integrally formed by injection molding. It can be understood that by providing the pad 32 with 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, and at least a portion of the second pad portion 322 is exposed on the second welding surface, the centering support 43 is conveniently connected to the first pad portion 321 of the first welding surface, and the conductive circuit or flexible circuit board connected to the external circuit is conveniently connected to the second pad portion 322 of the second welding surface, thereby smoothly conducting the external current through the conductive bracket 3 and the centering support 43 to the voice coil 42.

[0150] It is understood that the first welding surface is provided with two first welding pads. In this embodiment, the first welding pad portion 321 of the welding pad sheet 32 ​​is exposed on the first welding surface to form two first welding pads spaced apart. Optionally, the two first welding pads are spaced apart along the long axis of the magnetic circuit system 2; or, the two first welding pads are spaced apart along the short axis of the magnetic circuit system 2.

[0151] It should be noted that the two first pads are spaced apart along the long axis of the magnetic circuit system 2. In this case, the two centering supports 43 are arranged along the long axis of the magnetic circuit system 2 and are respectively connected to the two first pads. As shown in Figures 6, 9, and 12, the two first pads are spaced apart along the short axis of the magnetic circuit system 2. In this case, the two centering supports 43 are arranged along the long axis of the magnetic circuit system 2 and are respectively connected to the two first pads.

[0152] It is understood that the second welding surface is provided with two second welding pads. In this embodiment, the second welding pad portion 322 of the welding pad sheet 32 ​​is exposed on the second welding surface to form two second welding pads spaced apart. Optionally, the two second welding pads are spaced apart along the long axis of the magnetic circuit system 2; or, the two second welding pads are spaced apart along the short axis of the magnetic circuit system 2.

[0153] In one embodiment, the centering supports 43 include multiple ones, one end of each of the centering supports 43 is connected to the conductive bracket 3 , the other end of each of the centering supports 43 is connected to the diaphragm assembly 41 , and are electrically connected to the leads of the voice coil 42 .

[0154] In this embodiment, as shown in Figures 3 and 4, by providing a plurality of centering supports 43, one ends of the plurality of centering supports 43 are respectively connected to the conductive bracket 3, and the other ends of the plurality of centering supports 43 are respectively connected to the diaphragm assembly 41, and are respectively electrically connected to the leads of the voice coil 42, thereby improving the operating stability of the vibration system 4.

[0155] Optionally, multiple centering supports 43 are distributed along the long axis direction and / or short axis direction of the magnetic circuit system 2 and / or the diagonal or four corner positions of the magnetic circuit system 2. It is understandable that multiple centering supports 43 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; multiple centering supports 43 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; multiple centering supports 43 can also be arranged in correspondence at the diagonal positions of the magnetic circuit system 2; multiple centering supports 43 can also be arranged in correspondence at the four corner positions of the magnetic circuit system 2. Of course, in other embodiments, multiple centering supports 43 can be distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, and this is not limited here.

[0156] Optionally, the centering supports 43 include two or four. This arrangement can not only utilize the centering supports 43 to connect the conductive bracket 3 and the voice coil 42, but also ensure the vibration balance of the sound-generating device 100.

[0157] It is understandable that when there are two centering supports 43, the two centering supports 43 are arranged at intervals along the long axis direction of the magnetic circuit system 2; or, the two centering supports 43 are arranged at intervals along the short axis direction of the magnetic circuit system 2, and this is not limited here. Of course, when there are four centering supports 43, the two centering supports 43 are arranged at intervals along the long axis direction of the magnetic circuit system 2, and the two centering supports 43 are arranged at intervals along the short axis direction of the magnetic circuit system 2. In addition, when there are four centering supports 43, the four centering supports 43 can also be arranged correspondingly along the four corners of the magnetic circuit system 2. The present invention does not make any specific limitations on the arrangement of the centering supports 43.

[0158] In one embodiment, each centering support 43 includes a first connecting portion 431, an elastic arm 432, and a second connecting portion 433 connected in sequence. The first connecting portion 431 is connected to the diaphragm assembly 41 and is electrically connected to the lead of the voice coil 42. The second connecting portion 433 is connected to the conductive bracket 3.

[0159] In this embodiment, as shown in Figures 3 and 4 , the first connecting portion 431, the elastic arm 432, and the second connecting portion 433 of the centering support 43 can be integrally formed. This effectively ensures the structural strength of the centering support 43 while simplifying the processing steps of the centering support 43.

[0160] As will be appreciated, to ensure the deformation capacity of the centering arm 43, the elastic arm 432 has at least one bend. In this embodiment, a vibration space 33 is formed between the conductive bracket 3 and the inner wall of the mounting hole 25 to accommodate the centering arm 43. This ensures that the centering arm 43 has sufficient vibration space when vibrating with the voice coil 42, avoiding interference or impact on other components.

[0161] In one embodiment, as shown in Figures 3 and 4, the first connection portion 431 and the second connection portion 433 are located in different planes. It is understood that by arranging the first connection portion 431 and the second connection portion 433 of the centering support 43 in different planes, a height difference is created between the planes containing the first connection portion 431 and the planes containing the second connection portion 433 in the vibration direction of the voice coil 42. This facilitates the connection of the first connection portion 431 of the centering support 43 to the frame 412 of the diaphragm assembly 41 while also allowing for smooth welding to the leads of the voice coil 42. This also ensures that the centering support 43 avoids interference with the central magnetic plate 222 of the central magnetic portion 22 during vibration, thereby reducing the size of the avoidance area 223 provided on the central magnetic portion 22. Furthermore, the centering support 43 is used to connect the conductive bracket 3 to the diaphragm assembly 41 and effectively prevents problems such as oscillation or polarization of the voice coil 42 during vibration.

[0162] In one embodiment, as shown in FIG3 , two centering supports 43 are provided, and the two second connecting portions 433 are integrally formed, thereby connecting the two centering supports 43 as a whole. It will be appreciated that by providing the two second connecting portions 433 of the two centering supports 43 as an integrally formed structure, the two centering supports 43 are connected as a whole, thereby further simplifying the structure and processing steps of the centering supports 43.

[0163] In one embodiment, the diaphragm assembly 41 includes a diaphragm 411, a skeleton 412, and a dome 413. The diaphragm 411 is arranged opposite to the magnetic circuit system 2. An inner ring hole 4111 is provided in the center of the diaphragm 411. The skeleton 412 is provided in the inner ring hole 4111 and is connected to the diaphragm 411. The centering support piece 43 is connected to the skeleton 412. The skeleton 412 has an assembly hole 4121 corresponding to the conductive bracket 3. The dome 413 covers the assembly hole 4121. The voice coil 42 is connected to the diaphragm 411 or the skeleton 412.

[0164] In this embodiment, as shown in Figures 1, 3, and 5, the diaphragm assembly 41 is configured as a three-part structure consisting of a diaphragm 411, a frame 412, and a dome 413. The periphery of the diaphragm 411 is connected to the housing 1, and an inner ring hole 4111 is formed in the center of the diaphragm. By providing a frame 412 at the inner ring hole 4111, the frame 412 is utilized to connect and secure the voice coil 42 and the centering support 43, thereby improving installation stability. Furthermore, by providing an assembly hole 4121 in the frame 412 corresponding to the conductive bracket 3, the centering support 43 can be conveniently installed and secured using the assembly hole 4121, thereby connecting and securing the centering support 43 to the conductive bracket 3 and the frame 412, thereby improving installation convenience.

[0165] It can be understood that in order to seal the assembly hole 4121, a spherical top 413 is provided at the assembly hole 4121 so that the spherical top 413 covers the assembly hole 4121. This can not only seal the assembly hole 4121 but also ensure the vibration performance of the diaphragm assembly 41.

[0166] In one embodiment, as shown in Figures 1 and 3 through 5 , the diaphragm 411 includes a rim, a fixed portion connected to the outer side of the rim, and an inner ring portion connected to the inner side of the rim. The inner ring portion defines an inner ring hole 4111. The periphery of the frame 412 is connected to the inner ring portion and is positioned between the voice coil 42 and the inner ring portion. As will be appreciated, the fixed portion, rim, and inner ring portion of the diaphragm 411 are sequentially connected to form an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 411.

[0167] In this embodiment, as shown in FIG3 , the frame 412 is provided with a receiving groove surrounding the assembly hole 4121, and the dome 413 is restrained within the receiving groove. It will be appreciated that by providing the receiving groove on the side of the frame 412 facing away from the voice coil 42, so that the receiving groove surrounds the assembly hole 4121, the receiving groove can be conveniently utilized to install and accommodate the dome 413, ensuring that the upper surface of the dome 413 is flush with the upper surface of the frame 412, thereby reducing the height of the sound-generating device 100 along the vibration direction of the vibration system 4 and ensuring the vibration performance of the entire diaphragm assembly 41.

[0168] Optionally, a step surface is formed on the periphery of the skeleton 412 , and a side of the diaphragm 411 adjacent to the inner ring hole 4111 is supported and connected to the step surface, and the step surface is located between the voice coil 42 and the diaphragm 411 .

[0169] In this embodiment, as shown in Figure 3, a step surface is provided on the periphery of the skeleton 412 so that the step surface is recessed toward the side of the voice coil 42, thereby ensuring that when the inner ring portion of the diaphragm 411 is overlapped and supported on the step surface of the skeleton 412, the upper surface of the inner ring portion of the diaphragm 411 is flush with the upper surface of the skeleton 412, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 41.

[0170] In one embodiment, the frame 412 is further provided with a connecting platform 4122 adjacent to the assembly hole 4121 and extending toward the mounting hole 25 . An end of the centering support piece 43 away from the conductive bracket 3 is connected to the connecting platform 4122 .

[0171] In this embodiment, as shown in Figures 3 to 5, a connecting platform 4122 is provided on the frame 412, extending toward the interior of the mounting hole 25. This allows the connecting platform 4122 to further secure the centering support 43, thereby improving the connection stability of the centering support 43. It will be appreciated that, since a gap exists between the diaphragm assembly 41 and the central magnetic portion 22 to define the vibration space 33, the top surface of the centering support 43 does not exceed the top surface of the central magnetic portion 22. Therefore, along the vibration direction of the vibration system 4, there is a height difference between the centering support 43 and the diaphragm assembly 41. By providing the connecting platform 4122 extending toward the interior of the mounting hole 25, the connecting platform 4122 can extend to the plane where the centering support 43 is located and connect to the centering support 43, thereby facilitating assembly.

[0172] Of course, it is understandable that the end of the centering support 43 away from the conductive bracket 3 can also extend toward the diaphragm assembly 41, thereby facilitating the assembly of the centering support 43 and the diaphragm assembly 41.

[0173] Optionally, the connecting platform 4122 is formed by bending or stretching a side of the frame 412 adjacent to the assembly hole 4121. For example, the connecting platform 4122 is formed as a vertically extending structure extending from a sidewall of the frame 412 adjacent to the assembly hole 4121 along the vibration direction (vertical direction) of the vibration system 4. This configuration can effectively improve the structural strength and processing ease of the connecting platform 4122. Of course, in other embodiments, the connecting platform 4122 and the frame 412 can also be provided as separate components and connected to form an integrated structure through welding or bonding, which is not limited here.

[0174] Optionally, the connecting platform 4122 is an annular boss disposed around the assembly hole 4121. As will be appreciated, the annular connection platform 4122 facilitates the connection and fixation of multiple centering supports 43, improving installation convenience. Of course, in other embodiments, the connecting platform 4122 comprises multiple connecting platforms 4122, with the multiple connecting platforms 4122 spaced apart along the periphery of the assembly hole 4121. Optionally, the connecting platform 4122 comprises two connecting platforms, with the two connecting platforms 4122 being disposed in a direction corresponding to the major axis, minor axis, or diagonal direction of the magnetic circuit system 2, respectively.

[0175] In one embodiment, the connecting platform 4122 includes a first connecting arm and a second connecting arm arranged at an angle, the end of the first connecting arm away from the second connecting arm is connected to the inner wall of the assembly hole 4121, the second connecting arm extends in a direction away from the skeleton 412, and the end of the centering support plate 43 away from the conductive bracket 3 is connected to the second connecting arm, the first connecting arm and the skeleton 412.

[0176] In this embodiment, by setting the connecting platform 4122 as the first connecting arm and the second connecting arm set at an angle, that is, the first connecting arm and the second connecting arm are set in an L shape, the contact area with the centering support plate 43 can be further increased, thereby improving the installation stability.

[0177] Optionally, the shape and structure of the first connecting portion 431 of the centering support plate 43 is similar to the shape and structure of the connecting platform 4122. In this way, the second connecting arm can be used to position the centering support plate 43, and the first connecting arm and the second connecting arm can be used to connect and fix the L-shaped first connecting portion 431 to guide the first connecting portion 431 to the side of the skeleton 412 facing away from the dome 413, so as to facilitate the connection and fixation of the lead of the voice coil 42 to the first connecting portion 431. This is not limited here.

[0178] In one embodiment, the connecting platform 4122 also includes two arcuate side walls, which are respectively arranged on both sides of the first connecting arm and connected to the second connecting arm and the inner wall of the assembly hole 4121, so that the first connecting arm, the second connecting arm and the two arcuate side walls enclose a curved groove.

[0179] It is understood that when the connecting platform 4122 is formed by stretching, it can form a semi-grooved structure, so that both sides of the first connecting arm and the second connecting arm of the connecting platform 4122 have curved sidewalls. Optionally, the first connecting arm is connected to the inner wall of the assembly hole 4121 in a smooth transition. Optionally, the first connecting arm and the second connecting arm are connected in a smooth transition.

[0180] It should be noted that the specific structural design of the connecting platform 4122 is not limited to the above-described case. As long as the centering support piece 43 can be installed and fixed, the present invention does not impose any specific restrictions on this.

[0181] In one embodiment, as shown in Figures 2, 3, 9, 10, and 12, a positioning post is provided on the periphery of the side of the housing 1 facing away from the diaphragm assembly 41. The magnetic yoke 21 is provided with a positioning notch corresponding to the positioning post, and the positioning post and the positioning notch are positioned and engaged. It will be understood that by providing the positioning post on the housing 1 and forming the positioning notch on the magnetic yoke 21 to position and engage with the positioning post, the magnetic circuit system 2 is positioned and installed, thereby improving installation convenience and accuracy.

[0182] In this embodiment, as shown in Figures 3 to 5, the edge magnetic portion 23 includes a stacked edge magnet 231 and a edge magnetic conductive plate 232. The edge magnet 231 is sandwiched between the edge magnetic conductive plate 232 and the magnetic conductive yoke 21. The edge magnetic conductive plate 232 is connected to the housing 1. Optionally, the edge magnetic conductive plate 232 and the housing 1 are integrally formed, which can simplify the structure and improve installation stability.

[0183] As shown in Figure 14, the present invention also proposes a sound module 600, which includes the above-mentioned sound device 100. The specific structure of the sound device 100 refers to the aforementioned embodiment. Since the sound module 600 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be repeated here.

[0184] In one embodiment, the sound module 600 also includes a module shell and a flexible circuit board 500. The sound device 100 is disposed in the module shell. One end of the flexible circuit board 500 is electrically connected to the conductive bracket 3 of the sound device 100, and the other end of the flexible circuit board 500 is used to connect to an external power supply.

[0185] As can be understood, the flexible circuit board 500 is used to connect the external circuit to the sound-generating device 100. The flexible circuit board 500 is provided with inner and outer pads. The inner pads of the flexible circuit board 500 are connected to the second soldering surface of the conductive bracket 3 of the sound-generating device 100, and the outer pads of the flexible circuit board 500 are used to connect to the external terminals.

[0186] In this embodiment, the module housing has a cavity, the sound-generating device 100 is disposed within the cavity of the module housing, and at least one end of the flexible circuit board 500 connected to the sound-generating device 100 is located within the cavity of the module housing. Of course, in other embodiments, the flexible circuit board 500 may be entirely disposed within the cavity of the module housing, and this is not a limitation here.

[0187] In one embodiment, a positioning ear 510 is provided at one end of the flexible circuit board 500 adjacent to the conductive bracket 3 , and the conductive bracket 3 is formed with a positioning side wall 314 that is positioned and matched with the positioning ear 510 .

[0188] In this embodiment, as shown in Figure 14, by providing a positioning ear 510 on the flexible circuit board 500, the positioning ear 510 is used to limit the contact with the positioning side wall 314 of the conductive bracket 3, so that the flexible circuit board 500 and the second welding surface of the conductive bracket 3 can be connected and conducted, and the problem of poor connection between the second welding surface of the flexible circuit board 500 and the conductive bracket 3 when the flexible circuit board 500 is shifted can be avoided.

[0189] To further achieve position-limited installation of the flexible circuit board 500, in one embodiment, as shown in Figures 2 and 7, the conductive bracket 3 is further provided with a clearance notch 313 corresponding to the flexible circuit board 500. It can be understood that the flexible circuit board 500 passes through the clearance notch 313 (avoidance notch) and the pressing groove 212 (avoidance notch 213) in sequence. In other words, the clearance notch 313 (avoidance notch) and the pressing groove 212 (avoidance notch 213) can not only achieve position-limited installation of the flexible circuit board 500, making the matching structure of the flexible circuit board 500 and the sound-generating device 100 simpler and more compact, but also play a guiding role for the flexible circuit board 500.

[0190] The present invention further provides an electronic device comprising the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present 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 thus will not be described in detail here.

[0191] In this embodiment, the electronic device further includes a device housing, in which the sound generating device 100 and the flexible circuit board 500 are both disposed. It is understood that the electronic device may be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., without limitation herein.

[0192] The present invention further provides an electronic device including the aforementioned sound module 600. The specific structure of the sound module 600 is similar to that of the aforementioned embodiments. Since the present 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 described in detail here.

[0193] 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 600 is disposed in the device housing.

[0194] 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 plate opposite the magnetic circuit system, one end of the voice coil being connected to the diaphragm assembly, the other end of the voice coil being disposed corresponding to the magnetic gap, one end of the centering support plate being electrically connected to the conductive bracket, the other end of the centering support plate being connected to the diaphragm assembly and electrically connected to a lead of the voice coil; Among them, the central magnetic part includes a central magnet and a central magnetic conductive plate arranged on the side of the central magnet opposite to the diaphragm assembly, the mounting hole passes through the central magnet and the central magnetic conductive plate, and the conductive bracket and the central magnetic conductive plate or the magnetic conductive yoke form an integrated injection molding structure.

2. The sound-generating device according to claim 1, wherein: The conductive bracket, the central magnetic plate and the central magnet are formed into an integral injection-molded structure; Alternatively, the conductive bracket, the magnetic yoke and the central magnet are formed into an integral injection-molded structure; Alternatively, the conductive bracket, the magnetic yoke, the central magnet and the central magnetic plate are formed into an integral injection-molded structure.

3. The sound-generating device according to claim 1, wherein: The edge magnetic part includes an edge magnet and an edge magnetic conductive plate provided on the edge magnet; The side magnets and / or the side magnetic conductive plates form a closed integral ring structure; or, the side magnets and the side magnetic conductive plates are both multiple and arranged in one-to-one correspondence, and adjacent side magnets are connected end to end to form a closed ring structure.

4. The sound-generating device according to claim 1, wherein: A limiting hole is formed between the conductive bracket and the hole wall of the mounting hole; The magnetic circuit system further includes an auxiliary magnet, which is disposed in the limiting hole, and at least a portion of the auxiliary magnet is disposed corresponding to the centering support piece.

5. The sound-generating device according to claim 4, wherein: The auxiliary magnet and the central magnet are integrally formed; or, the auxiliary magnet and the central magnet are bonded and connected; And / or, the distance between the auxiliary magnet and the diaphragm assembly is greater than the distance between the central magnet and the The distance between the diaphragm components; And / or, the auxiliary magnet is arranged in a ring shape; or, the auxiliary magnet includes a plurality of auxiliary magnets, and the plurality of auxiliary magnets are arranged at intervals and surround the conductive bracket; And / or, a portion of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly to form a relief area, one end of the relief area is connected to the mounting hole, and the other end of the relief area extends toward a periphery of the central magnetic conductive plate, and the relief area is arranged corresponding to the lead of the voice coil and / or the centering support plate; And / or, the central magnet is arranged in an annular shape; or, the central magnet includes a plurality of central magnets, and the plurality of central magnets are arranged in an annular shape to form the mounting hole; And / or, the central magnetic conductive plate is arranged in an integral ring shape; or, the central magnetic conductive plate includes a plurality of central magnetic conductive plates, and the plurality of central magnetic conductive plates are arranged in an annular shape to form the mounting hole; And / or, a positioning boss is provided on a side of the conductive bracket facing away from the centering support plate, and the positioning boss is in positioning contact with a side of the central magnet facing away from the central magnetic conductive plate.

6. The sound-generating device according to claim 1, wherein: The magnetic yoke is provided with a positioning platform adjacent to the mounting hole; The positioning platform is formed by bending a side of the magnetic yoke adjacent to the mounting hole; or, the positioning platform and the magnetic yoke are formed as a separate structure; And / or, the positioning platform is an annular boss arranged around the mounting hole; or, the positioning platform includes a plurality of positioning platforms, and the plurality of positioning platforms are arranged at intervals along the periphery of the mounting hole.

7. The sound-generating device according to claim 1, wherein: 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. There are one or more pressing grooves; wherein, when there are multiple pressing grooves, the multiple pressing grooves are arranged at intervals; and / or the multiple pressing grooves are symmetrically arranged with respect to the mounting hole; and / or the multiple pressing grooves are radially arranged with the mounting hole as the center; And / or, a circumference of the magnetic yoke is further provided with an avoidance gap, and an end of the pressing groove away from the mounting hole is connected to the avoidance gap.

8. The sound-generating device according to claim 1, wherein: The conductive bracket is provided with a first welding surface and a second welding surface which are arranged in opposite directions. The first welding surface is arranged to face the centering support piece and is connected to the centering support piece. The second welding surface is used to connect to an external power supply. Wherein, the first welding surface is not higher than a side surface of the central magnetic portion facing the diaphragm assembly.

9. The sound-generating device according to claim 8, wherein: A groove is provided on a side of the conductive bracket facing away from the first welding surface, and a bottom wall of the groove forms the second welding surface; And / or, the conductive bracket includes a main body and a pad piece, the pad piece is embedded in the main body, the pad piece includes a first pad portion and a second pad portion connected to each other, at least part of the first pad portion is exposed on the first welding surface, and at least part of the second pad portion is exposed on the second welding surface.

10. The sound-generating device according to claim 1, wherein: The centering supports include a plurality of support plates, one end of each of the support plates is connected to the conductive bracket, and the other ends of each of the support plates are connected to the diaphragm assembly and are electrically connected to the leads of the voice coil. Each of the centering supports includes a first connecting portion, an elastic arm, and a second connecting portion connected in sequence. The first connecting portion is connected to the diaphragm assembly and electrically connected to the lead of the voice coil. The second connecting portion is connected to the conductive bracket.

11. The sound generating device according to claim 10, wherein: The plurality of centering supports are correspondingly distributed along the major axis direction and / or minor axis direction of the magnetic circuit system and / or at diagonal or four corner positions of the magnetic circuit system; And / or, the first connection portion and the second connection portion are located in different planes; And / or, the first connecting portion, the elastic arm and the second connecting portion are an integrally formed structure; And / or, the elastic arm has at least one bend; And / or, the centering supports include two, and the two second connecting portions are an integrally formed structure, so that the two centering supports are connected as one.

12. The sound generating device according to any one of claims 1 to 11, characterized in that: The diaphragm assembly comprises: a diaphragm, the diaphragm being arranged opposite to the magnetic circuit system, and having an inner ring hole at the center thereof; A skeleton, the skeleton is arranged in the inner ring hole and connected to the diaphragm, the centering support is connected to the skeleton, and the skeleton is provided with an assembly hole corresponding to the conductive bracket; and A spherical top, wherein the spherical top cover is arranged on the assembly hole; Wherein, the voice coil is connected to the diaphragm or the skeleton.

13. The sound generating device according to claim 12, wherein: The skeleton is further provided with a connecting platform adjacent to the assembly hole and extending toward the installation hole, and one end of the centering support piece away from the conductive bracket is connected to the connecting platform.

14. The sound generating device according to claim 13, wherein: The connecting platform is formed by bending or stretching one side of the frame adjacent to the assembly hole; And / or, the connecting platform is an annular boss arranged around the assembly hole; or, the connecting platform includes multiple, and the multiple connecting platforms are arranged at intervals along the circumference of the assembly hole; or, the connecting platform includes two, and the two connecting platforms are respectively arranged corresponding to the major axis direction, minor axis direction or diagonal direction of the magnetic circuit system.

15. A sound module, characterized in that: The sound module includes: module housing; The sound-generating device according to any one of claims 1 to 14, 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.

16. The sound module according to claim 15, wherein: The flexible circuit board is provided with a positioning ear at one end adjacent to the conductive bracket, and the conductive bracket is formed with a positioning side wall that is positioned and matched with the positioning ear; And / or, the conductive bracket is further provided with a clearance gap corresponding to the flexible circuit board.

17. An electronic device, characterized in that: The electronic device comprises a sound-generating device according to any one of claims 1 to 14; Or, the electronic device includes the sound module as described in claim 15 or 16.

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