Sound production device and electronic device

Abstract

The application discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction. Two magnetic circuit assemblies of the sound production device are arranged at intervals along a first direction and form a magnetic gap therebetween. Each magnetic circuit assembly comprises a first magnetic conduction plate, a first magnet, a second magnetic conduction plate and a second magnet which are sequentially arranged along a second direction. The second magnet is connected with a magnetic yoke. One of the second magnetic conduction plate and the magnetic yoke is bent to extend to form a first welding part. The first welding part is welded to the other one. A voice coil of a vibration system is formed in a flat shape and is inserted into the magnetic gap. The voice coil drives a diaphragm assembly to vibrate along the second direction. At least one of a first side edge and a second side edge of the first magnetic conduction plate is bent to extend towards the first magnet to form a bent part. The bent part is limited to abut against the first magnet. The application aims to improve the installation stability of a magnetic circuit system in the sound production device and avoid problems such as falling off and failure of the magnetic circuit assemblies of the magnetic circuit system.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained widespread acceptance and adoption. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As the performance of electronic products improves, the acoustic performance of these devices is also an inevitable trend.

[0003] In the related art, the magnetic circuit system of the sound-generating device is usually fixed by glue. When the glue fails due to external environmental factors, the adhesive force of the glue decays or disappears, causing the magnets of the magnetic circuit system to fall off and fail. Summary of the Invention

[0004] The main purpose of the present invention is to provide a sound-generating device and an electronic device, aiming to improve the installation stability of the magnetic circuit system in the sound-generating device and avoid problems such as the magnetic circuit components of the magnetic circuit system falling off and failing.

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

[0006] shell;

[0007] A magnetic circuit system connected to the housing, comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, wherein the two magnetic circuit components are spaced apart along a first direction and a magnetic gap is formed therebetween, and each magnetic circuit component comprises a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked in sequence along a second direction, wherein the second magnet is connected to the magnetic yoke, wherein a periphery of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, wherein the first welding portion is welded to the other, and the second direction is perpendicular to the first direction; and

[0008] a vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, wherein the periphery of the diaphragm assembly is connected to the housing, the voice coil is flat, the axial direction of the voice coil is along the first direction and the voice coil is inserted into the magnetic gap, and the voice coil drives the diaphragm assembly to vibrate along the second direction;

[0009] The first magnetic conductive plate has a first side facing away from the voice coil and two second sides extending along the first direction;

[0010] At least one of the first side and the second side is bent and extended toward the first magnet to form a bent portion, and the bent portion is in limited contact with the first magnet.

[0011] In one embodiment, the second magnetic conductive plate has a first side wall on a side facing away from the voice coil, and the first side wall is bent and extended toward the magnetic conductive yoke to form the first welding portion; wherein the first welding portion includes a plurality of first welding portions, and the plurality of first welding portions are arranged at intervals along a third direction and are all welded to the magnetic conductive yoke, and the third direction is perpendicular to the first direction and the second direction respectively; or, both ends of the second magnetic conductive plate along the third direction are bent and extended to form the first welding portions, and both first welding portions are welded to the magnetic conductive yoke; and / or, the second magnet and the magnetic conductive yoke are provided with a first groove corresponding to the first welding portion, the first welding portion is accommodated in the first groove and is welded to the magnetic conductive yoke, and the surface of the first welding portion facing away from the first groove does not extend beyond the surfaces of the second magnet and the magnetic conductive yoke facing away from the voice coil;

[0012] And / or, the second magnetic conductive plate has two second side walls extending along the first direction, each second side wall being bent and extended toward the magnetic conductive yoke to form the first welding portion; wherein the first welding portion is located at an end of the second side wall away from the voice coil; and / or, the second magnet and the magnetic conductive yoke are provided with a first groove corresponding to the first welding portion, the first welding portion is received in the first groove and is welded to the magnetic conductive yoke, and a surface of the first welding portion facing away from the first groove does not extend beyond a side surface of the second magnet extending along the first direction;

[0013] And / or, the magnetic yoke is bent and extended toward the side of the second magnetic plate facing away from the voice coil to form the first welding portion, the second magnet and the second magnetic plate are provided with a first groove corresponding to the first welding portion, the first welding portion is accommodated in the first groove and is welded to the second magnetic plate, and the surface of the first welding portion facing away from the first groove does not exceed the surface of the second magnet and the second magnetic plate facing away from the voice coil.

[0014] In one embodiment, the first side edge is bent and extended toward the first magnet to form the bent portion; wherein the bent portion includes one and is located in the middle region of the first side edge; or, both ends of the first side edge along the third direction are bent and extended to form the bent portion, both bent portions are in limited contact with the first magnet, and the third direction is perpendicular to the first direction and the second direction respectively;

[0015] And / or, each of the second side edges is bent to extend towards the first magnet to form the bent portion; wherein the bent portion comprises one, which is located at an end of the second side edge away from the voice coil; or the bent portion comprises a plurality, which are arranged in the first direction and each abuts against the first magnet.

[0016] And / or, the first magnet is provided with a positioning groove corresponding to the bent portion, and the bent portion is accommodated in the positioning groove and abuts against the first magnet.

[0017] In an embodiment, each of the first magnetic conductive plates further has a third side edge facing the magnetic gap, and the third side edge is provided with a first stop portion which abuts against a side of the first magnet facing the magnetic gap.

[0018] And / or, each of the second magnetic conductive plates has a third side wall facing the magnetic gap, and the third side wall is provided with a second stop portion which abuts against a side of the second magnet facing the magnetic gap.

[0019] In an embodiment, each of the third side edges is provided with a plurality of the first stop portions which are arranged in the first direction and each abuts against the side of the first magnet facing the magnetic gap; or each of the third side edges is provided with the first stop portion at two corners in a third direction, and the two first stop portions each abut against the side of the first magnet facing the magnetic gap, and the third direction is perpendicular to the first direction and the second direction.

[0020] And / or, the first stop portion is formed by bending the corner of the first magnetic conductive plate close to the magnetic gap to extend towards the first magnet; or the first stop portion is a boss formed by recessing the corner of the first magnetic conductive plate close to the magnetic gap towards the first magnet, and the boss is formed by stamping and half-cutting process of the first magnetic conductive plate.

[0021] And / or, each of the first magnets is provided with a first limiting groove corresponding to the first stop portion on a side facing the magnetic gap, and the first stop portion is limited in the first limiting groove, and a surface of the first stop portion facing the magnetic gap does not exceed a surface of the first magnet facing the magnetic gap.

[0022] In one embodiment, each of the third side walls is provided with a plurality of the second stop portions, the plurality of the second stop portions are spaced apart, and each of the second stop portions is in limited contact with a side of the second magnet facing the magnetic gap; or, each of the third side walls is provided with a second stop portion at two corners along a third direction, and both of the second stop portions are in limited contact with a side of the second magnet facing the magnetic gap, and the third direction is perpendicular to the first direction and the second direction, respectively.

[0023] And / or, the second stop portion is formed by bending and extending the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet; or, the second stop portion is a boss formed by recessing the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet, and the boss is formed by the second magnetic conductive plate through a stamping and half-shearing process;

[0024] And / or, a second limiting groove is provided on the side of each second magnet facing the magnetic gap corresponding to the second stop portion, the second stop portion is limited in the second limiting groove, and the surface of the second stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

[0025] In one embodiment, the housing is a metal shell, and the housing is welded to the first magnetic conductive plate;

[0026] And / or, the first magnet and the second magnet of each magnetic circuit assembly are magnetized along the second direction and in opposite directions, and the magnetization directions of the two first magnets and the two second magnets facing each other along the first direction are opposite.

[0027] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate connected to the diaphragm, and the vibration plate is connected to the voice coil;

[0028] The outer shell includes a connected annular bracket and a bottom shell, the periphery of the diaphragm is combined with the inner wall of the annular bracket, and the diaphragm and the annular bracket are integrally hot-pressed or injection-molded, the bottom shell is a metal shell, the bottom shell includes an annular body and a side wall connected to the annular body, the side wall has a receiving hole, the magnetic circuit assembly extends to the receiving hole, and the first magnetic plate is welded to the annular body on the side facing away from the magnetic yoke.

[0029] In one embodiment, the vibration system further includes a frame and a centering support, wherein the frame includes two frames and is respectively provided at both ends of the voice coil along a third direction, the frame connecting the voice coil and the diaphragm assembly, and the third direction is perpendicular to the first direction and the second direction respectively;

[0030] There are two centering supports, which are distributed at both ends of the voice coil corresponding to the frame. Each centering support includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion. Each inner fixing portion is connected to one of the frames and has an inner solder pad electrically connected to the lead of the voice coil.

[0031] The housing is provided with a relief opening corresponding to each of the external fixing parts, each of the external fixing parts is passed through the relief opening and provided with an external soldering pad, and the magnetic yoke is bent and extended toward the external fixing part corresponding to each of the relief openings to form a positioning protrusion.

[0032] The present invention further provides an electronic device, which includes the above-mentioned sound-generating device.

[0033] The sound-generating device of the technical solution of the present invention connects the magnetic circuit system and the vibration system to the shell, thereby realizing the installation and fixation of the magnetic circuit system and the vibration system, and sets the magnetic circuit system as a magnetic yoke and two magnetic circuit components arranged on one side of the magnetic yoke, so that the two magnetic circuit components are arranged at intervals along the first direction and form a magnetic gap therebetween, and sets the vibration system as a diaphragm component and a voice coil connected to the diaphragm component, so that the voice coil is located in the magnetic gap of the magnetic circuit system, so that when power is turned on, the voice coil can vibrate in the magnetic gap under the drive of the magnetic circuit system, thereby driving the diaphragm component to vibrate and make sound, so that the sound-generating device has a sound-generating function; at the same time, by setting the voice coil to a flat shape, the axial direction of the voice coil is along the first direction and inserted into the magnetic gap, so that compared with the sound-generating device with an annular voice coil and an annular magnetic gap, the structure of the sound-generating device of the present invention is more compact and occupies less assembly space; further, by setting each magnetic circuit component The component is configured as a first magnetic plate, a first magnet, a second magnetic plate and a second magnet stacked in sequence along the second direction, the second magnet is connected to the magnetic yoke, and one of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, so that the first welding portion is welded to the other, thereby utilizing the first welding portion to further connect the magnetic yoke and the magnetic circuit component of the magnetic circuit system into a whole, thereby improving the connection stability. In this way, the suction force between the magnetic circuit components of the magnetic circuit system can be offset by the first welding portion, and the magnetic circuit components of the magnetic circuit system can be prevented from falling off and failing when the glue bonding force of the magnetic circuit system decays or disappears. At the same time, by arranging a bending portion extending toward the first magnet on at least one of the first side edge and the second side edge of the first magnetic plate, the bending portion is used to limit the contact with the first magnet, so that the bending portion can be used to position and limit the installation of the first magnet, thereby further improving the installation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 A schematic structural diagram of a first embodiment of a sound-generating device provided by the present invention;

[0036] Figure 2 A schematic structural diagram of the first embodiment of the sound-generating device provided by the present invention from another perspective;

[0037] Figure 3 A partially exploded schematic diagram of a first embodiment of the sound-generating device provided by the present invention;

[0038] Figure 4 A cross-sectional schematic diagram of a first embodiment of the sound-generating device provided by the present invention;

[0039] Figure 5 A schematic structural diagram of a first embodiment of a magnetic circuit system provided by the present invention;

[0040] Figure 6 A side structural diagram of a first embodiment of a magnetic circuit system provided by the present invention;

[0041] Figure 7 An exploded schematic diagram of a first embodiment of the magnetic circuit system provided by the present invention;

[0042] Figure 8 An exploded schematic diagram of a first embodiment of a magnetic circuit assembly provided by the present invention;

[0043] Figure 9 A schematic structural diagram of a second embodiment of the sound-generating device provided by the present invention;

[0044] Figure 10 A schematic structural diagram of the second embodiment of the sound-generating device provided by the present invention from another perspective;

[0045] Figure 11 A schematic structural diagram of a second embodiment of the magnetic circuit system provided by the present invention;

[0046] Figure 12 A side structural diagram of a second embodiment of the magnetic circuit system provided by the present invention;

[0047] Figure 13 An exploded schematic diagram of a second embodiment of the magnetic circuit system provided by the present invention;

[0048] Figure 14An exploded schematic diagram of a second embodiment of a magnetic circuit assembly provided by the present invention;

[0049] Figure 15 A cross-sectional schematic diagram of a third embodiment of the sound-generating device provided by the present invention;

[0050] Figure 16 A schematic structural diagram of a third embodiment of the magnetic circuit system provided by the present invention;

[0051] Figure 17 A side structural diagram of a third embodiment of the magnetic circuit system provided by the present invention;

[0052] Figure 18 An exploded schematic diagram of a third embodiment of the magnetic circuit system provided by the present invention;

[0053] Figure 19 An exploded schematic diagram of a third embodiment of a magnetic circuit assembly provided by the present invention;

[0054] Figure 20 A cross-sectional schematic diagram of the connection between the diaphragm assembly and the annular support in one embodiment of the sound-generating device provided by the present invention;

[0055] Figure 21 This is a schematic structural diagram of the connection between the voice coil, the frame and the centering support in one embodiment of the sound-generating device provided by the present invention.

[0056] Description of Figure Numbers:

[0057] 100. Sound-generating device; 1. Housing; 11. Annular bracket; 12. Bottom shell; 121. Annular body; 1211. Limiting portion; 1212. Avoidance groove; 122. Sidewall; 1221. Accommodating hole; 1222. Avoidance opening; 2. Magnetic circuit system; 21. Magnetic yoke; 211. Positioning protrusion; 22. Magnetic circuit assembly; 221. First magnetic plate; 2211. Protrusion; 2212. Limiting groove; 2213. First stopper; 2214. Bend; 2215. First side edge; 2216. Second side edge; 2217. Third side edge; 222. First magnet; 2221. First limiting groove; 2222. Positioning groove; 223. Second magnetic conductive plate; 2231. First welding portion; 2232. Second stopping portion; 2233. First side wall; 2234. Second side wall; 2235. Third side wall; 224. Second magnet; 2241. Second limiting groove; 23. Magnetic gap; 24. First groove; 3. Vibration system; 31. Diaphragm assembly; 311. Diaphragm; 312. Vibration plate; 3121. Reinforcing rib; 32. Voice coil; 33. Skeleton; 331. First connecting portion; 332. Second connecting portion; 333. Third connecting portion; 34. Centering support plate; 341. External fixing portion; 3411. External welding pad; 342. Internal fixing portion; 343. Elastic arm.

[0058] 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

[0059] 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.

[0060] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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.

[0061] 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.

[0062] 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.

[0063] In recent years, with the rapid development of consumer electronics, electronic devices such as headphones, smartphones, and VR devices have gained widespread acceptance and adoption. Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As the performance of electronic products improves, the acoustic performance of these devices is also an inevitable trend.

[0064] In the related art, the magnetic circuit system of the sound generating device is usually fixed by adhesive bonding. The adhesive can be stored for a long time without adhesion decay in a normal temperature physical environment, but in some high temperature, high humidity or acid-base environments, the adhesive bonding force will quickly decay, resulting in bonding failure. When the adhesive fails due to external environmental factors, the adhesive bonding force decays or disappears, causing the magnets of the magnetic circuit system to fall off and fail. At the same time, the magnetic circuit system provides driving force for the vibration of the voice coil, and there is an attractive or repulsive static magnetic force between the magnets of the magnetic circuit system, which accelerates the falling off and failure of the magnets due to the existence of the static magnetic force.

[0065] Based on the above ideas and problems, the present application provides a sound generating device 100 applied to an electronic device. It can be understood that the electronic device can be a mobile phone, earphone, smart wearable device, smart glasses, etc., which is not limited here.

[0066] In this embodiment, the sound generating device 100 is provided with a first welding part 2231 on the second magnetic conduction plate 223 or the magnetic conduction yoke 21 of the magnetic circuit assembly 22 of the magnetic circuit system 2, so that the first welding part 2231 is welded and connected with the magnetic conduction yoke 21 or the second magnetic conduction plate 223. Even if the adhesive of the magnetic circuit system 2 fails, it will not fall off due to the welding and fixing limitation of the first welding part 2231. At the same time, the first side edge 2215 and / or the second side edge 2216 of the first magnetic conduction plate 221 is provided with a bending part 2214 extending towards the first magnet 222, which is limited and abuts with the first magnet 222 by the bending part 2214. In this way, the bending part 2214 can be used to position and limit the installation of the first magnet 222, further improving the installation stability.

[0067] Please refer to Figures 1 to 21As shown, in an embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3. The magnetic circuit system 2 is connected to the housing 1. The magnetic circuit system 2 includes a magnetic yoke 21 and two magnetic circuit components 22 provided on one side of the magnetic yoke 21. The two magnetic circuit components 22 are arranged at intervals along the first direction and a magnetic gap 23 is formed between them. Each magnetic circuit component 22 includes a first magnetic plate 221, a first magnet 222, a second magnetic plate 223 and a second magnet 224 stacked in sequence along the second direction. The second magnet 224 is connected to the magnetic yoke 21. The periphery of one of the second magnetic plate 223 and the magnetic yoke 21 is bent and extended to form a first welding portion 2231. The first welding portion 2231 is connected to the other Welded connection, the second direction is perpendicular to the first direction, the vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31, the periphery of the diaphragm assembly 31 is connected to the shell 1, the voice coil 32 is formed into a flat shape, the axial direction of the voice coil 32 is along the first direction and inserted in the magnetic gap 23, the voice coil 32 drives the diaphragm assembly 31 to vibrate along the second direction; wherein, the first magnetic conductive plate 221 has a first side 2215 on the side facing away from the voice coil 32 and two second sides 2216 extending along the first direction; at least one of the first side 2215 and the second side 2216 is bent and extended toward the first magnet 222 to form a bent portion 2214, and the bent portion 2214 is limitedly abutted against the first magnet 222.

[0068] In this embodiment, the sound-generating device 100 may be a speaker unit, and the sound-generating device 100 may be applied to electronic devices, such as computers, mobile phones, smart wearable devices, etc. This embodiment is described by taking the sound-generating device 100 as a speaker unit as an example.

[0069] Understandably, Figures 1 to 3 、 Figure 9 and Figure 10 As shown, the sound-generating device 100 has a long and narrow shape. It should be noted that the sound-generating device 100 has a long axis, a short axis, and a height (thickness) along the vibration direction. The short axis of the sound-generating device 100 is defined as the first direction, the vibration direction of the sound-generating device 100 (i.e., the height (thickness) direction of the sound-generating device 100) is defined as the second direction, and the long axis of the sound-generating device 100 is defined as the third direction. The vibration direction, short axis, and long axis directions are mutually perpendicular, meaning that the first, second, and third directions are perpendicular to each other.

[0070] In this embodiment, the ratio of the length to the width of the sound-generating device 100 is greater than or equal to 2:1, allowing it to better fit within the reserved space of a miniature electronic device, such as a smart wearable device (e.g., a smartwatch). As will be appreciated, the voice coil 32 of the vibration system 3 is flat, with its axial direction along a first direction and inserted within the magnetic gap 23. This allows the voice coil 32 to drive the diaphragm assembly 31 to vibrate in a second direction, thereby vibrating the vibration system 3 in the second direction. By configuring the voice coil 32 in a flat shape, the voice coil 32 of the present invention, when used in the sound-generating device 100, achieves a thinner structure compared to sound-generating devices with an annular voice coil and an annular magnetic gap, facilitating the development of thinner electronic devices.

[0071] Understandably, Figures 3 to 7 、 Figures 11 to 13 、 Figures 15 to 18 As shown, the two magnetic circuit assemblies 22 of the magnetic circuit system 2 are arranged at intervals along a first direction on one side of the magnetic yoke 21, forming a magnetic gap 23 between the two magnetic circuit assemblies 22. The voice coil 32 is inserted into the magnetic gap 23 on the side away from the diaphragm assembly 31. In this way, when powered, the voice coil 32 can vibrate under the drive of the magnetic circuit system 2, thereby driving the diaphragm assembly 31 connected to the voice coil 32 to vibrate and produce sound, thus enabling the sound-generating device 100 to have a sound-generating function. At the same time, by configuring the voice coil 32 in a flat shape, the structure of the sound-generating device 100 of the present invention is more compact than a sound-generating device with an annular voice coil and an annular magnetic gap, occupying less assembly space.

[0072] In this embodiment, if Figures 1 to 19 As shown, by setting each magnetic circuit component 22 to have a first magnetic conductive plate 221, a first magnet 222, a second magnetic conductive plate 223 and a second magnet 224 stacked in sequence along the second direction, the second magnet 224 of each magnetic circuit component 22 is connected to one side of the magnetic yoke 21, the second magnetic conductive plate 223 is clamped between the first magnet 222 and the second magnet 224, and the first magnet 222 is clamped between the first magnetic conductive plate 221 and the second magnetic conductive plate 223, so that the first magnetic conductive plate 221, the first magnet 222, the second magnetic conductive plate 223 and the second magnet 224 of the two magnetic circuit components 22 correspond one to one along the first direction and are spaced to form a magnetic gap 23.

[0073] Alternatively, as Figure 4 、 Figure 15 As shown, the first magnet 222 and the second magnet 224 of each magnetic circuit assembly 22 are magnetized along the second direction and in opposite directions. The magnetization directions of the two first magnets 222 and the two second magnets 224 facing each other along the first direction are opposite.

[0074] It can be understood that a first magnetic gap is formed between the two first magnetic conductive plates 221, and the long side of the voice coil 32 close to the diaphragm assembly 31 is located in the first magnetic gap. A second magnetic gap is formed between the two second magnetic conductive plates 223, and the long side of the voice coil 32 away from the diaphragm assembly 31 is located in the second magnetic gap. The utilization rate of the magnetic circuit system 2 is higher, and the voice coil 32 can obtain greater driving force.

[0075] In this embodiment, a first welding portion 2231 is formed by bending and extending the periphery of the second magnetic plate 223 toward the magnetic yoke 21, so that the first welding portion 2231 is welded to the magnetic yoke 21, or a first welding portion 2231 is formed by bending and extending the magnetic yoke 21 toward the second magnetic plate 223, so that the first welding portion 2231 is welded to the second magnetic plate 223. In this way, the first welding portion 2231 is used to further strengthen the connection strength between the magnetic yoke 21 and the magnetic circuit component 22 of the magnetic circuit system 2, so that the magnetic circuit system 2 is further connected as a whole through the first welding portion 2231, thereby improving the structural stability of the magnetic circuit system 2. In this way, the first welding portion 2231 can be used to offset the suction force between the magnetic circuit components 22 of the magnetic circuit system 2, and can also prevent the magnetic circuit components 22 of the magnetic circuit system 2 from falling off and failing when the adhesive force of the glue of the magnetic circuit system 2 declines or disappears.

[0076] At the same time, a bending portion 2214 extending toward the first magnet 222 is further provided on at least one of the first side 2215 and the second side 2216 of the first magnetic conductive plate 221, that is, a bending portion 2214 extending toward the first magnet 222 is provided on the first side 2215 and / or the second side 2216, and the bending portion 2214 is used to limit the contact with the first magnet 222. In this way, the bending portion 2214 can be used to position and limit the installation of the first magnet 222. At the same time, the provision of the bending portion 2214 is also beneficial to effectively fix the first magnet 222 to prevent it from displacement or loosening during use, thereby ensuring that the overall performance of the magnetic circuit system 2 is stable and reliable and extending its service life.

[0077] It is understood that each second magnetic conductive plate 223 may optionally be square. In one embodiment, the second magnetic conductive plate 223 includes a first sidewall 2233 on a side facing away from the voice coil 32 and two second sidewalls 2234 extending along a first direction. At least one of the first sidewall 2233 and the second sidewall 2234 bends and extends toward the magnetic guide yoke 21 to form a first welding portion 2231, which is welded to the magnetic guide yoke 21. Specifically, the first sidewall 2233 may bend and extend toward the magnetic guide yoke 21 to form the first welding portion 2231, or each second sidewall 2234 may be bent and extended toward the magnetic guide yoke 21 to form the first welding portion 2231. Alternatively, both the first sidewall 2233 and each second sidewall 2234 may be bent and extended toward the magnetic guide yoke 21 to form the first welding portion 2231.

[0078] In this embodiment, if Figures 1 to 3 、 Figures 5 to 15 、 Figures 16 to 19 As shown, the first side wall 2233 and / or the second side wall 2234 of the second magnetic conductive plate 223 are provided with a first welding portion 2231. This arrangement not only strengthens the connection strength between the magnetic conductive yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 through the first welding portion 2231, but also facilitates assembly and improves assembly efficiency without affecting the driving of the voice coil 32 by the magnetic circuit system 2.

[0079] In one embodiment, if Figures 9 to 14 、 Figures 16 to 19 As shown, the first sidewall 2233 bends and extends toward the guide yoke 21 to form a first welding portion 2231. Optionally, the first welding portion 2231 includes one or more. It will be appreciated that when the first sidewall 2233 is provided with one first welding portion 2231, the length of the first welding portion 2231 along the third direction is less than or equal to the length of the first sidewall 2233 along the third direction. Optionally, the first welding portion 2231 is located in the middle of the first sidewall 2233.

[0080] When the first side wall 2233 is provided with multiple first welding portions 2231 , the multiple first welding portions 2231 are arranged at intervals along the third direction and are all welded to the magnetic yoke 21 . The third direction is perpendicular to the first direction and the second direction respectively, which is not limited here.

[0081] As can be understood, the side of the second magnetic plate 223 facing away from the voice coil 32 bends and extends toward the magnetic yoke 21 to form a plurality of spaced first welding portions 2231. Each of the first welding portions 2231 is welded to the magnetic yoke 21. This further strengthens the connection between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2.

[0082] Of course, in other embodiments, such as Figures 9 to 14 、 Figures 16 to 19 As shown, both ends of the second magnetic plate 223 along the third direction are bent and extended to form first welding portions 2231, and both first welding portions 2231 are welded to the magnetic yoke 21. It will be understood that by bending and extending both ends of the first side wall 2233 along the third direction to form the first welding portions 2231, and thereby utilizing the two first welding portions 2231 to weld to the magnetic yoke 21, the connection strength between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 can be improved, which is not limited here.

[0083] In one embodiment, if Figures 1 to 3 、 Figures 5 to 8As shown, each second side wall 2234 is bent to extend towards the magnetic yoke 21 to form a first welding portion 2231. Optionally, the first welding portion 2231 comprises one or more. It can be understood that when each second side wall 2234 is provided with one first welding portion 2231, the length of the first welding portion 2231 along the first direction is less than or equal to the length of the second side wall 2234 along the first direction. Optionally, the first welding portion 2231 is located at the end of the second side wall 2234 away from the voice coil 32.

[0084] When each second side wall 2234 is provided with a plurality of first welding portions 2231, the plurality of first welding portions 2231 are spaced apart along the first direction and are all welded to the magnetic yoke 21, which is not limited herein. It can be understood that by using the plurality of first welding portions 2231 to be welded to the magnetic yoke 21, the connection strength of the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 can be further improved.

[0085] In an embodiment, the magnetic yoke 21 is provided with at least one first welding portion 2231 corresponding to each second magnetic plate 223, and the first welding portion 2231 is welded to the second magnetic plate 223, which is not limited herein. In this way, the structural stability of the magnetic circuit system 2 can be further improved. Optionally, the first welding portion 2231 is welded to the middle position of the second magnetic plate 223. It can be understood that the magnetic yoke 21 is provided with a plurality of first welding portions 2231 corresponding to each second magnetic plate 223, and the plurality of first welding portions 2231 are spaced apart along the third direction, which is not limited herein.

[0086] In an embodiment, the magnetic yoke 21 is bent to extend towards the side of the second magnetic plate 223 away from the voice coil 32 to form a first welding portion 2231, and the first welding portion 2231 is welded to the second magnetic plate 223. In this way, the first welding portion 2231 can not only strengthen the connection strength of the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2, but also facilitate assembly, improve assembly efficiency, and does not affect the driving of the voice coil 32 by the magnetic circuit system 2.

[0087] Optionally, the first welding portion 2231 comprises a plurality of. In the present embodiment, the plurality of first welding portions 2231 are spaced apart along the third direction and are all welded to the second magnetic plate 223, and the third direction is perpendicular to the first direction and the second direction.

[0088] It can be understood that the circumference of the magnetic yoke 21 is bent to extend towards the side of the magnetic circuit assembly 22 away from the voice coil 32 to form a plurality of first welding portions 2231 spaced apart, and the plurality of first welding portions 2231 are all welded to the second magnetic plate 223. In this way, the connection strength of the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 can be further improved.

[0089] Of course, in other embodiments, the first welding portion 2231 includes one. Optionally, the first welding portion 2231 is welded to the middle of the side of the second magnetic conducting plate 223 facing away from the voice coil 32, which is not limited here.

[0090] It can be understood that each first magnetic conducting plate 221 is optionally square. In an embodiment, the first magnetic conducting plate 221 has a first side 2215 facing away from the voice coil 32 and two second sides 2216 extending in the first direction; wherein the first side 2215 is bent to extend to form a bending portion 2214 towards the first magnet 222; and / or each second side 2216 is bent to extend to form a bending portion 2214 towards the first magnet 222.

[0091] In the present embodiment, as shown in Figures 1 to 3 , Figures 5 to 14 , Figures 16 to 19 At least one of the first side 2215 and the second side 2216 of the first magnetic conducting plate 221 is provided with a bending portion 2214. Such an arrangement can achieve positioning and limiting installation of the first magnet 222 through the bending portion 2214, and the arrangement of the bending portion 2214 is also conducive to effective fixation of the first magnet 222, preventing displacement or loosening of the first magnet 222 during use, ensuring stable and reliable overall performance of the magnetic circuit system 2, and prolonging the service life.

[0092] In an embodiment, as shown in Figures 9 to 14 , Figures 16 to 19 The first side 2215 is bent to extend to form a bending portion 2214 towards the first magnet 222. Optionally, the bending portion 2214 includes one or more. It can be understood that when the first side 2215 is provided with one bending portion 2214, the length of the bending portion 2214 in the third direction is less than or equal to the length of the first side 2215 in the third direction. Optionally, the bending portion 2214 is located in the middle region of the first side 2215.

[0093] When the first side 2215 is provided with multiple bending portions 2214, the multiple bending portions 2214 are arranged in intervals in the third direction and are all in limiting abutment with the first magnet 222, and the third direction is perpendicular to the first direction and the second direction. It can be understood that the side of the first magnetic conducting plate 221 facing away from the voice coil 32 is bent to extend to form multiple bending portions 2214 arranged in intervals, and the multiple bending portions 2214 are all in limiting abutment with the first magnet 222, which can further strengthen the connection strength of the magnetic conducting yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2.

[0094] Of course, in other embodiments, as shown in Figures 9 to 14 , Figures 16 to 19As shown, both ends of the first side 2215 along the third direction are bent and extended to form bent portions 2214. Both bent portions 2214 are in positional contact with the first magnet 222. The third direction is perpendicular to the first and second directions. It will be appreciated that by bending and extending both ends of the first magnetic plate 221 along the third direction, which faces away from the voice coil 32, to form bent portions 2214, the two bent portions 2214 are in positional contact with the first magnet 222. This improves the connection strength between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2, which is not limited herein.

[0095] In one embodiment, if Figures 1 to 3 、 Figures 5 to 8 As shown, each second side 2216 bends and extends toward the first magnet 222 to form a bent portion 2214. Optionally, one or more bent portions 2214 may be provided. It will be appreciated that when each second side 2216 is provided with one bent portion 2214, the length of the bent portion 2214 along the first direction is less than or equal to the length of the second side 2216 along the first direction. Optionally, the bent portion 2214 is located at the end of the second side 2216 away from the voice coil 32.

[0096] When multiple bent portions 2214 are provided on each second side 2216, the bent portions 2214 are spaced apart along the first direction and all abut against the first magnet 222. This can further enhance the connection strength between the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2.

[0097] The sound-generating device 100 of the present invention connects the magnetic circuit system 2 and the vibration system 3 to the housing 1, thereby achieving the installation and fixation of the magnetic circuit system 2 and the vibration system 3, and sets the magnetic circuit system 2 as a magnetic yoke 21 and two magnetic circuit components 22 arranged on one side of the magnetic yoke 21, so that the two magnetic circuit components 22 are arranged at intervals along the first direction and form a magnetic gap 23 between them, and sets the vibration system 3 as a diaphragm component 31 and a voice coil 32 connected to the diaphragm component 31, so that the voice coil 32 is located in the magnetic gap 23 of the magnetic circuit system 2, so that when power is turned on, the voice coil 32 can vibrate in the magnetic gap 23 under the drive of the magnetic circuit system 2, thereby driving the diaphragm assembly 31 to vibrate and make sound, so that the sound-generating device 100 has a sound-generating function; at the same time, by setting the voice coil 32 to be flat, the axial direction of the voice coil 32 is along the first direction and inserted into the magnetic gap 23, so that compared with the sound-generating device with an annular voice coil and an annular magnetic gap, the structure of the sound-generating device 100 of the present invention is more compact and occupies less assembly space; further, by setting each magnetic circuit assembly 22 to be a first magnetic circuit assembly stacked in sequence along the second direction, the first magnetic circuit assembly 31 can be vibrated in the magnetic gap 23, thereby driving the diaphragm assembly 31 to vibrate and make sound, thereby making the sound-generating device 100 have a sound-generating function; at the same time, by setting the voice coil 32 to be flat, the axial direction of the voice coil 32 is along the first direction and inserted into the magnetic gap 23, so that the structure of the sound-generating device 100 of the present invention is more compact and occupies less assembly space The magnetic plate 221, the first magnet 222, the second magnetic plate 223 and the second magnet 224, the second magnet 224 is connected to the magnetic yoke 21, and the periphery of one of the second magnetic plate 223 and the magnetic yoke 21 is bent and extended to form a first welding portion 2231, so that the first welding portion 2231 is welded to the other of the two; thereby, the first welding portion 2231 is further used to connect the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 into a whole, thereby improving the connection stability. In this way, the magnetic field can be offset by the first welding portion 2231. The suction force between the magnetic circuit components 22 of the magnetic circuit system 2 can prevent the magnetic circuit components 22 of the magnetic circuit system 2 from falling off and failing when the adhesive force of the glue of the magnetic circuit system 2 declines or disappears. At the same time, a bending portion 2214 extending toward the first magnet 222 is provided on the first side 2215 and / or the second side 2216 of the first magnetic conductive plate 221, and the bending portion 2214 is used to limit the contact with the first magnet 222. In this way, the bending portion 2214 can be used to achieve positioning and limiting installation of the first magnet 222, thereby further improving the installation stability.

[0098] In one embodiment, the second magnet 224 and the magnetic yoke 21 are provided with a first groove 24 corresponding to the first welding portion 2231 . The first welding portion 2231 is received in the first groove 24 and is welded to the magnetic yoke 21 .

[0099] In this embodiment, if Figures 1 to 3 、 Figures 5 to 14 、 Figures 16 to 19As shown, the second magnet 224 and the magnetic yoke 21 are both provided with a first groove 24. The first groove 24 provides an accommodation space for the first welding portion 2231. This not only allows the first welding portion 2231 to be positioned and installed, but also allows the first welding portion 2231 to further enhance the structural stability of the magnetic circuit system 2. Optionally, the first welding portion 2231 is provided in a one-to-one correspondence with the first groove 24.

[0100] Optionally, the surface of the first welding portion 2231 facing away from the first groove 24 does not extend beyond the side surface of the second magnet 224 extending along the first direction. This arrangement ensures that the first welding portion 2231 does not protrude from the outer surface of the sound-emitting device 100, thereby improving the aesthetics while preventing the first welding portion 2231 from interfering with or affecting other structures. In this embodiment, the side of the first welding portion 2231 facing away from the first groove 24 is flush with the side of the second magnet 224 and the magnetic yoke 21 facing away from the voice coil 32.

[0101] In this embodiment, a welding identification line is provided on the first welding portion 2231 corresponding to the magnetic yoke 21 , so that the first welding portion 2231 and the magnetic yoke 21 can be easily positioned during welding, thereby improving welding efficiency.

[0102] It is understood that when the first welding portion 2231 is provided on the first sidewall 2233 of the second magnetic conductive plate 223, the sidewalls of the second magnet 224 and the magnetic yoke 21 extending along the third direction are both provided with first grooves 24, that is, the first grooves 24 are both located outside the second magnet 224 and the magnetic yoke 21. When the first welding portion 2231 is provided on the second sidewall 2234 of the second magnetic conductive plate 223, the sidewalls of the second magnet 224 extending along the first direction are provided with first grooves 24, and the magnetic yoke 21 is provided with a through hole or an opening with a notch corresponding to the first groove 24 of the second magnet 224, which is not limited here. Optionally, the side of the first welding portion 2231 facing away from the first groove 24 is flush with the side of the second magnet 224 extending along the first direction.

[0103] In one embodiment, the second magnet 224 and the second magnetic conductive plate 223 are provided with a first groove 24 corresponding to the first welding portion 2231 . The first welding portion 2231 is received in the first groove 24 and is welded to the second magnetic conductive plate 223 .

[0104] In this embodiment, a first groove 24 is provided on each of the second magnet 224 and the second magnetic conductive plate 223 on a side facing away from the voice coil 32, corresponding to the first welding portion 2231. The first groove 24 provides accommodation space for the first welding portion 2231, thereby enabling positioning and installation of the first welding portion 2231 and further enhancing the structural stability of the magnetic circuit system 2. Optionally, the first welding portions 2231 and the first grooves 24 are provided in a one-to-one correspondence.

[0105] Optionally, the surface of the first welding portion 2231 facing away from the first groove 24 does not extend beyond the surfaces of the second magnet 224 and the second magnetic conductive plate 223 facing away from the voice coil 32. This arrangement ensures that the first welding portion 2231 does not protrude from the outer surface of the sound-producing device 100, thereby improving the aesthetics while preventing the first welding portion 2231 from interfering with or affecting other structures. In this embodiment, the side of the first welding portion 2231 facing away from the first groove 24 is flush with the side of the magnetic circuit assembly 22 facing away from the voice coil 32.

[0106] In this embodiment, a welding identification line is provided on the first welding portion 2231 corresponding to the second magnetic conductive plate 223 , so that the first welding portion 2231 and the second magnetic conductive plate 223 can be easily positioned during welding, thereby improving welding efficiency.

[0107] In one embodiment, the first magnet 222 is provided with a positioning groove 2222 corresponding to the bent portion 2214 . The bent portion 2214 is received in the positioning groove 2222 and is in limited contact with the first magnet 222 .

[0108] In this embodiment, if Figures 1 to 3 、 Figures 5 to 14 、 Figures 16 to 19 As shown, by providing a positioning groove 2222 on the first magnet 222, the bent portion 2214 is accommodated in the positioning groove 2222 and is in position-limiting abutment with the first magnet 222. In this way, the positioning groove 2222 can be used to provide a space for accommodating and positioning the bent portion 2214, and the bent portion 2214 can also be used to cooperate with the first magnet 222 in position-limiting abutment, further enhancing the structural stability of the magnetic circuit system 2. Optionally, the bent portion 2214 and the positioning groove 2222 are provided in a one-to-one correspondence.

[0109] Optionally, the side of the bent portion 2214 facing away from the positioning groove 2222 is flush with the outer wall of the first magnet 222. This arrangement can ensure that the bent portion 2214 does not protrude from the outer surface of the sound-emitting device 100, thereby improving the aesthetics while avoiding interference or impact of the bent portion 2214 on other structures.

[0110] It is understood that when the bent portion 2214 is provided on the first side 2215 of the first magnetic conductive plate 221, the side of the bent portion 2214 facing away from the positioning slot 2222 is flush with the side of the first magnet 222 along the third direction. When the bent portion 2214 is provided on the second side 2216 of the first magnetic conductive plate 221, the side of the bent portion 2214 facing away from the positioning slot 2222 is flush with the side of the first magnet 222 along the first direction, which is not limited here.

[0111] In one embodiment, each first magnetic conductive plate 221 further has a third side 2217 facing the magnetic gap 23 . The third side 2217 is provided with a first stopper 2213 . The first stopper 2213 abuts against a side of the first magnet 222 facing the magnetic gap 23 .

[0112] In this embodiment, if Figures 5 to 8 、 Figures 11 to 19 As shown, by setting a first stop portion 2213 on the side of the first magnetic conductive plate 221 facing the voice coil 32, the first stop portion 2213 is limitedly abutted against the first magnet 222, thereby preventing the two first magnets 222 from attracting each other and approaching each other along the first direction, further offsetting the static magnetic force, and avoiding product defects caused by the attraction of the two first magnets 222. At the same time, when the glue bonding force of the magnetic circuit system 2 declines or disappears, it can prevent the magnetic circuit component 22 of the magnetic circuit system 2 from falling off and failing.

[0113] Optionally, the first stop portion 2213 includes multiple or more first stop portions. It is understood that when one first stop portion 2213 is provided on the third side 2217, the length of the first stop portion 2213 along the third direction is less than or equal to the length of the third side 2217 along the third direction. Optionally, the first stop portion 2213 is located in the middle of the third side 2217.

[0114] Each third side 2217 is provided with a plurality of first stoppers 2213, which are spaced apart along the third direction and are all in contact with the side of the first magnet 222 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0115] In this embodiment, if Figures 5 to 8 、 Figures 11 to 19 As shown, by providing a first stop portion 2213 on the side of the first magnetic conductive plate 221 facing the voice coil 32, the first stop portion 2213 is utilized to limit and abut against the side of the first magnet 222 facing the voice coil 32, thereby preventing the two first magnets 222 from being attracted to each other along the first direction.

[0116] Optionally, a plurality of first stoppers 2213 are provided on a side of the first magnetic conductive plate 221 facing the voice coil 32. The plurality of first stoppers 2213 are spaced apart along a third direction, and each of the plurality of first stoppers 2213 is in limited contact with a side of the first magnet 222 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0117] In one embodiment, each third side 2217 is provided with a first stop portion 2213 at two corners along the third direction, and the two first stop portions 2213 are both in limited contact with one side of the first magnet 222 facing the magnetic gap 23, and the third direction is perpendicular to the first direction and the second direction respectively.

[0118] Understandably, Figures 5 to 8 、 Figures 11 to 19 As shown, by providing the first stop portions 2213 at the two corners of the first magnetic conductive plate 221 facing the voice coil 32, the two first stop portions 2213 at the two corners can be used to limit the first magnet 222 without affecting the magnetic field driving effect of the first magnetic conductive plate 221 and the first magnet 222 on the voice coil 32.

[0119] Optionally, the first stop portion 2213 is formed by bending and extending the corner of the first magnetic conductive plate 221 on the side close to the magnetic gap 23 toward the first magnet 222. This can simplify the processing steps.

[0120] Of course, in other embodiments, the first stop portion 2213 may alternatively be a boss formed by a corner portion of the first magnetic conductive plate 221 on the side near the magnetic gap 23 that is recessed toward the first magnet 222, and the boss is formed by the first magnetic conductive plate 221 through a stamping and half-shearing process. It is understood that the side of the first magnetic conductive plate 221 facing away from the first magnet 222 is recessed toward the first magnet 222, so that the side of the first magnetic conductive plate 221 facing the first magnet 222 protrudes to form the first stop portion 2213. Optionally, the height of the first stop portion 2213 protruding from the side of the first magnetic conductive plate 221 facing the first magnet 222 is consistent with the thickness of the first magnetic conductive plate 221 along the second direction.

[0121] In one embodiment, a first limiting groove 2221 is provided on the side of each first magnet 222 facing the magnetic gap 23 corresponding to the first stop portion 2213, and the first stop portion 2213 is limited in the first limiting groove 2221, and the surface of the first stop portion 2213 facing the magnetic gap 23 does not exceed the surface of the first magnet 222 facing the magnetic gap 23.

[0122] In this embodiment, if Figures 5 to 8 、 Figures 11 to 19 As shown, by providing a first limiting groove 2221 on the side of the first magnet 222 facing the voice coil 32, the first limiting groove 2221 corresponds to the first stop portion 2213. In this way, the first stop portion 2213 is limited within the first limiting groove 2221. Therefore, the first limiting groove 2221 can be used to position the first stop portion 2213 and prevent the two first magnets 222 from attracting each other along the first direction. It can be understood that the first limiting groove 2221 is formed by removing material from the position of the first magnet 222 corresponding to the first stop portion 2213.

[0123] Optionally, the surface of the first stop portion 2213 facing the magnetic gap 23 does not exceed the surface of the first magnet 222 facing the magnetic gap 23. In this way, the voice coil 32 can be effectively prevented from colliding with the first stop portion 2213, and the strength of the first stop portion 2213 can be enhanced, thereby increasing the stability of the product. In the embodiment, the side of the first stop portion 2213 facing the magnetic gap 23 is flush with the side of the first magnet 222 facing the magnetic gap 23.

[0124] In the embodiment, the lower end surface of the first stop portion 2213 does not exceed the side surface of the first magnet 222 facing away from the first magnetic conducting plate 221. Optionally, the lower end surface of the first stop portion 2213 is flush with the side surface of the first magnet 222 facing away from the first magnetic conducting plate 221. In this way, the stopping force of the first stop portion 2213 on the first magnet 222 can be effectively increased, thereby ensuring the stability of the product. It should be noted that the shape of the first stop portion 2213 can be cylindrical or other shapes, as long as it cooperates with the first limiting groove 2221, which is not limited herein.

[0125] In an embodiment, each second magnetic conducting plate 223 has a third side wall 2235 facing the magnetic gap 23, and the third side wall 2235 is provided with a second stop portion 2232, which is in limiting abutment with the side of the second magnet 224 facing the magnetic gap 23.

[0126] In the embodiment, as shown in Figures 5 to 8 、 Figures 11 to 19 , by providing the second stop portion 2232 on the side of the second magnetic conducting plate 223 close to the magnetic gap 23, the second stop portion 2232 is in limiting abutment with the second magnet 224. In this way, the two second magnets 224 along the first direction can be prevented from being attracted to each other and approaching, further canceling the static magnetic force, avoiding product defects caused by the attraction of the two second magnets 224, and preventing the magnetic circuit assembly 22 of the magnetic circuit system 2 from falling off and failing when the adhesive bonding force of the magnetic circuit system 2 decays or disappears.

[0127] Optionally, the second stop portion 2232 includes one or more. It can be understood that when the third side wall 2235 is provided with one second stop portion 2232, the length of the second stop portion 2232 along the third direction is less than or equal to the length of the third side wall 2235 along the third direction. Optionally, the second stop portion 2232 is located at the middle position of the third side wall 2235.

[0128] In an embodiment, each third side wall 2235 is provided with a plurality of second stop portions 2232, and the plurality of second stop portions 2232 are spaced apart along the third direction and are in limiting abutment with the side of the second magnet 224 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0129] In this embodiment, if Figures 5 to 8 、 Figures 11 to 19 As shown, by providing a second stop portion 2232 on the side of the second magnetic conductive plate 223 facing the voice coil 32, the second stop portion 2232 is utilized to limit and abut against the side of the second magnet 224 facing the voice coil 32, thereby preventing the two second magnets 224 from being attracted to each other along the first direction.

[0130] Optionally, a plurality of second stoppers 2232 are provided on a side of the second magnetic conductive plate 223 facing the voice coil 32. The plurality of second stoppers 2232 are spaced apart along a third direction, and each of the plurality of second stoppers 2232 is in limited contact with a side of the second magnet 224 facing the magnetic gap 23. The third direction is perpendicular to the first direction and the second direction.

[0131] In one embodiment, each third side wall 2235 is provided with a second stop portion 2232 at two corners along the third direction, and the two second stop portions 2232 are both limitedly abutted against one side of the second magnet 224 facing the magnetic gap 23, and the third direction is perpendicular to the first direction and the second direction respectively.

[0132] Understandably, Figures 5 to 8 、 Figures 11 to 19 As shown, by providing second stop portions 2232 at the two corners of the second magnetic conductive plate 223 facing the voice coil 32, the two second stop portions 2232 at the two corners can be used to limit the second magnet 224 without affecting the magnetic field driving effect of the second magnetic conductive plate 223 and the second magnet 224 on the voice coil 32.

[0133] Optionally, the second stop portion 2232 is formed by bending and extending a corner portion of the second magnetic conductive plate 223 on a side close to the magnetic gap 23 toward the second magnet 224. This simplifies the processing steps.

[0134] Of course, in other embodiments, the second stop portion 2232 is a boss formed by a corner portion of the second magnetic conductive plate 223 on the side near the magnetic gap 23, which is recessed toward the second magnet 224. The boss is formed by the second magnetic conductive plate 223 through a stamping and half-shearing process. It is understood that the side of the second magnetic conductive plate 223 facing away from the second magnet 224 is recessed toward the second magnet 224, so that the side of the second magnetic conductive plate 223 facing the second magnet 224 protrudes to form the second stop portion 2232. Optionally, the height of the second stop portion 2232 protruding from the side of the second magnetic conductive plate 223 facing the second magnet 224 is consistent with the thickness of the second magnetic conductive plate 223 along the second direction.

[0135] In one embodiment, a second limiting groove 2241 is provided on the side of each second magnet 224 facing the magnetic gap 23 corresponding to the second stop portion 2232, and the second stop portion 2232 is limited in the second limiting groove 2241, and the surface of the second stop portion 2232 facing the magnetic gap 23 does not exceed the surface of the first magnet 222 facing the magnetic gap 23.

[0136] In this embodiment, if Figures 5 to 8 、 Figures 11 to 19 As shown, by providing a second limiting groove 2241 on the side of the second magnet 224 facing the voice coil 32, the second limiting groove 2241 corresponds to the second stop portion 2232, so that the second stop portion 2232 is limited in the second limiting groove 2241. Therefore, the second limiting groove 2241 can be used to position the second stop portion 2232 and prevent the two second magnets 224 from attracting each other along the first direction. It can be understood that the second limiting groove 2241 is formed by removing material from the second magnet 224 at the position corresponding to the second stop portion 2232.

[0137] Optionally, the surface of the second stopper 2232 facing the magnetic gap 23 does not extend beyond the surface of the second magnet 224 facing the magnetic gap 23. This arrangement effectively prevents collision between the voice coil 32 and the second stopper 2232 while also strengthening the second stopper 2232 and thereby increasing product stability. In this embodiment, the side of the second stopper 2232 facing the magnetic gap 23 is flush with the side of the second magnet 224 facing the magnetic gap 23.

[0138] In this embodiment, the lower end surface of the second stop portion 2232 is flush with the surface of the second magnet 224 facing away from the second magnetic conductive plate 223. This effectively increases the stopping force of the second stop portion 2232 on the second magnet 224, ensuring product stability. It should be noted that the shape of the second stop portion 2232 can be cylindrical or other shapes, as long as it matches the second limiting groove 2241, and is not limited here.

[0139] To further improve the installation stability and reliability of the magnetic circuit system 2 of the sound-generating device 100, in one embodiment, the housing 1 is a metal housing, and the housing 1 is welded to the first magnetic conductive plate 221. Optionally, the housing 1 is a metal housing or at least partially made of metal. In this way, while the housing 1 is welded to the first magnetic conductive plate 221, the magnetic yoke 21 is also welded to the magnetic circuit assembly 22 using the first welding portion 2231. As a result, the magnetic yoke 21 and the magnetic circuit assembly 22 of the magnetic circuit system 2 are welded and fixed to the housing 1, thereby further improving the reliability of the magnetic circuit system 2 and the stability of the connection between the magnetic circuit system 2 and the housing 1.

[0140] Of course, in other embodiments, the shell 1 can also be bonded to the first magnetic conduction plate 221, which is not limited here.

[0141] In order to further improve the connection stability of the shell 1 and the magnetic circuit system 2, in an embodiment, as shown in Figure 3 , Figure 4 , Figure 15 , the inner wall of the shell 1 is provided with a limiting portion 1211, and the limiting portion 1211 is connected with the first magnetic conduction plate 221. It can be understood that the limiting portion 1211 is arranged along the plane in the first direction, and optionally, the limiting portion 1211 is arranged in a ring shape. The limiting portion 1211 is connected with the side of the first magnetic conduction plate 221 away from the first magnet 222. Optionally, the limiting portion 1211 is welded or bonded to the first magnetic conduction plate 221, which is not limited here.

[0142] Optionally, the limiting portion 1211 is arranged in a ring shape along the inside of the shell 1, and the limiting portion 1211 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage and achieving high waterproofness.

[0143] It can be understood that in order to ensure that the diaphragm assembly 31 has sufficient vibration space, the limiting portion 1211 is provided with a recess 1212 corresponding to the folded ring portion of the diaphragm assembly 31. In this way, the recess 1212 can provide vibration and avoidance space for the diaphragm assembly 31 during vibration.

[0144] In an embodiment, the side of the first magnetic conduction plate 221 close to the magnetic gap 23 is raised to form a protruding portion 2211 in the second direction away from the first magnet 222, the protruding portion 2211 cooperates with the first magnetic conduction plate 221 to form a limiting recess 2212, the limiting portion 1211 is limited in the limiting recess 2212 and abuts with the protruding portion 2211.

[0145] In the present embodiment, as shown in Figures 3 to 8 , Figures 11 to 19 , by providing the protruding portion 2211 on the side of the first magnetic conduction plate 221 close to the magnetic gap 23, the magnetic induction density passing through the voice coil 32 is increased by the protruding portion 2211 of the first magnetic conduction plate 221, the magnetic induction intensity is improved, and the magnetic field area where the voice coil 32 is located is further expanded, so that the driving force factor of the voice coil 32 can be symmetrical relative to the static balance position.

[0146] In an embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312 connected to the diaphragm 311, and the vibration plate 312 is connected with the voice coil 32; the shell 1 includes a ring-shaped support 11 and a bottom shell 12 connected together, the periphery of the diaphragm 311 is combined with the inner circumferential wall of the ring-shaped support 11, and the diaphragm 311 is integrally formed with the ring-shaped support 11 by hot pressing or injection molding, and the bottom shell 12 is connected with the magnetic circuit system 2.

[0147] In this embodiment, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 9 、 Figure 15 、 Figure 20 As shown, the diaphragm 311 can optionally be annular, with the vibration plate 312 disposed in the center of the diaphragm 311. Optionally, the vibration plate 312 can be provided with reinforcing ribs 3121 that extend concavely toward the side closest to the voice coil 32. This can enhance the structural strength of the vibration plate 312. It is understood that there can be one or more reinforcing ribs 3121, and one or more reinforcing ribs 3121 can extend along the first direction or the third direction, without limitation.

[0148] Optionally, the vibration plate 312 is hot-pressed or injection-molded using one of magnesium-aluminum alloy, aluminum, polyethylene naphthalate, polyethylene terephthalate, liquid crystal polymer, or polyetherimide. Alternatively, the diaphragm 311 can be hot-pressed or injection-molded using one of silicone rubber, AEM rubber, or ACM rubber. In this embodiment, the prepared vibration plate 312 is placed as an insert in a mold, and then the diaphragm 311 is molded, so that the vibration plate 312 and diaphragm 311 form an integrated structure.

[0149] In this embodiment, if Figures 1 to 4 、 Figure 9 、 Figure 10 、 Figure 15 and Figure 21 As shown, the housing 1 includes an annular support 11, and the diaphragm 311 is combined with the inner circumferential wall of the annular support 11. Optionally, the diaphragm 311 and the annular support 11 are integrally formed by hot pressing or injection molding. It is understood that the annular support 11 is made of plastic and can be integrally formed with the diaphragm 311 of the vibration system 3 through an injection molding process.

[0150] As can be understood, the annular support 11 is placed in the mold as an insert, and then the diaphragm raw material is injection-molded into the mold to form the diaphragm 311. During the injection of the raw material, the raw material combines with the annular support 11, thereby achieving a connection between the two, that is, the diaphragm 311 is combined with the inner circumferential wall of the annular support 11. Alternatively, the diaphragm 311 is integrally formed with the annular support 11 through a hot pressing process.

[0151] In this embodiment, the diaphragm 311 and the annular bracket 11 are integrally formed, which can improve the connection stability between the two. No glue is required between the diaphragm 311 and the annular bracket 11, thereby meeting the high-level waterproof requirements of electronic equipment.

[0152] In this embodiment, if Figures 1 to 4 、 Figure 9 、 Figure 10 、 Figure 15 As shown, the housing 1 further includes a bottom shell 12 , which is an annular frame structure and is bonded or inlaid to the side of the annular bracket 11 facing the magnetic circuit system 2 . The magnetic circuit system 2 is connected inside the bottom shell 12 .

[0153] It is understood that the bottom shell 12 can be made of plastic or metal. In this embodiment, the bottom shell 12 can be made of metal, that is, the bottom shell 12 is a metal shell. In this way, the bottom shell 12 is welded to the first magnetic conductive plate 221 of the magnetic circuit assembly 22, thereby further improving the connection stability between the housing 1 and the magnetic circuit system 2.

[0154] In this embodiment, the first magnet 222, the second magnetic conductive plate 223, and the second magnet 224 are sequentially connected to the first magnetic conductive plate 221 by bonding. It is understood that the two first magnetic conductive plates 221 can also provide support for the diaphragm 311 under high water pressure, thereby protecting the diaphragm 311 from water pressure damage, thereby achieving high waterproofing.

[0155] In one embodiment, if Figures 1 to 3 、 Figure 9 、 Figure 10 As shown, the bottom shell 12 includes an annular body 121 and a side wall 122 connected to the annular body 121. The first magnetic plate 221 is connected to the annular body 121 on the side facing away from the magnetic yoke 21, and the side wall 122 is welded to the magnetic yoke 21. This effectively enhances the connection strength between the bottom shell 12, the magnetic yoke 21, and the magnetic circuit system 2.

[0156] In one embodiment, if Figures 1 to 3 、 Figure 9 、 Figure 10 As shown, the bottom shell 12 includes an annular body 121 and a side wall 122 connected to the annular body 121. The first magnetic conductive plate 221 is connected to the annular body 121 on a side facing away from the magnetic guide yoke 21. The side wall 122 has a receiving hole 1221, and the magnetic circuit assembly 22 extends into the receiving hole 1221. Optionally, the first magnetic conductive plate 221 is welded to the annular body 121 on a side facing away from the magnetic guide yoke 21.

[0157] It is understandable that by providing the receiving hole 1221 on the side wall 122, each magnetic circuit assembly 22 can extend into the receiving hole 1221 and form an extension portion, thereby increasing the volume of each magnetic circuit assembly 22, improving the magnetic field strength, and further improving the acoustic performance of the sound-generating device 100. It should be noted that the outer surface of the extension portion of the magnetic circuit assembly 22 does not exceed the outer surface of the side wall 122. Optionally, the outer surface of the extension portion of the magnetic circuit assembly 22 is substantially flush with the outer surface of the side wall 122. In this way, the outer shape of the sound-generating device 100 is more regular, making it easier to adapt to the reserved space of the electronic device.

[0158] In one embodiment, the vibration system 3 further includes a skeleton 33 , which includes two skeletons and is respectively arranged at both ends of the voice coil 32 along the third direction. The skeleton 33 connects the voice coil and the diaphragm assembly 31 ; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0159] In this embodiment, if Figure 3 、 Figure 21 As shown, the voice coil 32 is connected to the vibration plate 312 of the diaphragm assembly 31 via a bobbin 33. This allows the bobbin 33 to be used to adjust the vertical position and depth of the voice coil 32 within the magnetic gap 23, placing the voice coil 32 in a location with denser magnetic flux lines, thereby improving magnetic circuit utilization. Optionally, two bobbins 33 are provided, one at each end of the voice coil 32 along the third direction.

[0160] It can be understood that the voice coil 32 is a flat voice coil formed by winding a wire. The voice coil 32 includes two opposite long axis sides arranged in the magnetic gap 23 and a short axis side connecting the two long axis sides. The skeleton 33 includes two skeletons 33, and the two skeletons 33 are arranged at both ends of the voice coil 32 along the long axis direction (i.e., the third direction), and are respectively connected to the vibration plate 312 of the diaphragm assembly 31 and the short axis side of the voice coil 32. In this way, the skeleton 33 does not occupy the width of the magnetic gap 23, and can reduce the width of the sound-emitting device 100, or when the width dimension is constant, the setting dimension of the magnetic circuit assembly 22 can be increased to improve the magnetic field performance; at the same time, the skeleton 33 can flexibly adjust the (height) position of the voice coil 32 in the magnetic gap 23, which is convenient for operation.

[0161] In one embodiment, the vibration system 3 further includes two centering supports 34 , which are distributed at both ends of the voice coil 32 corresponding to the skeleton 33 .

[0162] Optionally, each skeleton 33 includes a first connecting portion 331 and a second connecting portion 332 and a third connecting portion 333 respectively arranged at both ends of the first connecting portion 331 and bent toward both sides of the first connecting portion 331. The two first connecting portions 331 are located at both ends of the voice coil 32 along the third direction and are respectively connected to two side surfaces opposite to the voice coil 32. The two second connecting portions 332 are respectively connected to the vibration plate 312, and the two third connecting portions 333 are respectively connected to the two centering supports 34.

[0163] In this embodiment, if Figures 1 to 4 、 Figure 9 、 Figure 10 、 Figure 15 、 Figure 21As shown, each centering support 34 is provided with at least two electrically connected spot welding pads. One of the spot welding pads on each centering support 34 is connected to an external power line, while the other spot welding pad on each centering support 34 is connected to a lead of the voice coil 32. This allows current to flow into the voice coil 32 through one centering support 34 and out through the other centering support 34, thus achieving electrical connection between the voice coil 32 and the external power source. This arrangement not only solves the connection problem between the voice coil 32 and the external power source, but also improves the balance of the voice coil 32, thereby reducing polarization of the vibration system 3.

[0164] It can be understood that the skeleton 33 can be optionally an integrally molded structure, that is, the skeleton 33 includes a first connecting part 331, a second connecting part 332 and a third connecting part 333, all of which are plate-shaped, wherein the two first connecting parts 331 of the two skeletons 33 are located at both ends of the voice coil 32 along the third direction, and are respectively bonded to the two side surfaces opposite to the voice coil 32, the two second connecting parts 332 are respectively connected to the vibration plate 312, and the two third connecting parts 333 are respectively connected to the two centering supports 34.

[0165] Through the above arrangement, this embodiment solves the connection problem between the voice coil 32 and the external power supply and improves the balance of the voice coil 32 , thereby reducing the polarization phenomenon of the vibration system 3 .

[0166] In one embodiment, each centering support 34 includes an outer fixing portion 341 , an inner fixing portion 342 , and an elastic arm 343 connecting the outer fixing portion 341 and the inner fixing portion 342 . Each inner fixing portion 342 is connected to a frame 33 and has an inner solder pad electrically connected to the lead of the voice coil 32 .

[0167] In this embodiment, if Figures 1 to 4 、 Figure 9 、 Figure 10 、 Figure 15 、 Figure 21 As shown, two centering supports 34 are provided at both ends of the sound-generating device 100 along the long axis direction. Each centering support 34 includes an inner fixing portion 342, an elastic arm 343 and an outer fixing portion 341. The inner fixing portion 342 is connected to the third connecting portion 333 of the skeleton 33, and the outer fixing portion 341 is provided on the outer shell 1. The two ends of the elastic arm 343 are respectively connected to the inner fixing portion 342 and the outer fixing portion 341. The outer fixing portion 341 is also provided with an outer soldering pad 3411 that can be electrically connected to an external circuit, and the inner fixing portion 342 is provided with an inner soldering pad that is electrically connected to the lead of the voice coil 32.

[0168] As can be understood, the provision of the external solder pad 3411 enables the centering support 34 to be connected to the external circuit, thereby facilitating the introduction of external circuit current into the voice coil 32. It should be noted that an internal solder pad is provided on the internal fixing portion 342, and the lead of the voice coil 32 is electrically connected to the internal solder pad.

[0169] Optionally, the outer solder pad 3411 and the centering support 34 are integrally formed, thereby reducing the number of structural components and facilitating assembly of the sound-generating device 100. Furthermore, the skeleton 33 is connected to the inner fixing portion 342, that is, the skeleton 33 simultaneously connects the vibration plate 312, the voice coil 32, and the centering support 34. This improves the vibration consistency of the vibration system 3, enhances the responsiveness of the sound-generating device 100, reduces distortion, and further optimizes the acoustic performance of the sound-generating device 100.

[0170] In one embodiment, the housing 1 has an escape opening 1222 corresponding to each external fixing portion 341 . Each external fixing portion 341 passes through the escape opening 1222 and has an external solder pad 3411 . The magnetic yoke 21 bends and extends toward the external fixing portion 341 corresponding to each escape opening 1222 to form a positioning protrusion 211 .

[0171] In this embodiment, if Figures 1 to 4 、 Figure 9 、 Figure 10 、 Figure 15 、 Figure 21 As shown, the outer fixing portion 341 of the centering support 34 is at least partially located outside the housing 1, facilitating electrical connection between the outer solder pad 3411 and the external circuit. By providing a clearance opening 1222 on the housing 1, the outer fixing portion 341 of the centering support 34 extends toward the outside of the housing 1.

[0172] It is understandable that in order to cover the avoidance openings 1222 , the magnetic yoke 21 bends and extends toward the outer fixing portion 341 corresponding to each avoidance opening 1222 to form a positioning protrusion 211 , that is, the outer fixing portion 341 is located between the positioning protrusion 211 and the avoidance openings 1222 of the housing 1 .

[0173] In this embodiment, the centering support 34 not only provides a restraining force to restrain the voice coil 32 from vibrating along the vibration direction, but also introduces the external circuit current into the voice coil 32, thereby simplifying the number of structural components of the sound-generating device 100, simplifying the assembly process, and improving assembly efficiency.

[0174] 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.

[0175] Optionally, the electronic device of the present invention may be a portable mobile electronic product such as a mobile phone or a tablet, or a wearable device such as a watch, VR, AR, etc., which is not specifically limited here.

[0176] 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: shell; A magnetic circuit system connected to the housing, comprising a magnetic yoke and two magnetic circuit components disposed on one side of the magnetic yoke, wherein the two magnetic circuit components are spaced apart along a first direction and a magnetic gap is formed therebetween, and each magnetic circuit component comprises a first magnetic plate, a first magnet, a second magnetic plate, and a second magnet stacked in sequence along a second direction, wherein the second magnet is connected to the magnetic yoke, wherein a periphery of the second magnetic plate and the magnetic yoke is bent and extended to form a first welding portion, wherein the first welding portion is welded to the other, and the second direction is perpendicular to the first direction; and a vibration system comprising a diaphragm assembly and a voice coil connected to the diaphragm assembly, wherein the periphery of the diaphragm assembly is connected to the housing, the voice coil is flat, the axial direction of the voice coil is along the first direction and the voice coil is inserted into the magnetic gap, and the voice coil drives the diaphragm assembly to vibrate along the second direction; The first magnetic conductive plate has a first side facing away from the voice coil and two second sides extending along the first direction; At least one of the first side and the second side is bent and extended toward the first magnet to form a bent portion, and the bent portion is in limited contact with the first magnet.

2. The sound-generating device according to claim 1, wherein: The second magnetic conductive plate has a first side wall on a side facing away from the voice coil, and the first side wall is bent and extended toward the magnetic conductive yoke to form the first welding portion; wherein the first welding portions include a plurality of first welding portions, and the plurality of first welding portions are arranged at intervals along a third direction and are all welded to the magnetic conductive yoke, and the third direction is perpendicular to the first direction and the second direction respectively; or, both ends of the second magnetic conductive plate along the third direction are bent and extended to form the first welding portions, and both first welding portions are welded to the magnetic conductive yoke; and / or, the second magnet and the magnetic conductive yoke are provided with a first groove corresponding to the first welding portion, the first welding portion is accommodated in the first groove and is welded to the magnetic conductive yoke, and the surface of the first welding portion facing away from the first groove does not extend beyond the surfaces of the second magnet and the magnetic conductive yoke facing away from the voice coil; And / or, the second magnetic conductive plate has two second side walls extending along the first direction, each second side wall being bent and extended toward the magnetic conductive yoke to form the first welding portion; wherein the first welding portion is located at an end of the second side wall away from the voice coil; and / or, the second magnet and the magnetic conductive yoke are provided with a first groove corresponding to the first welding portion, the first welding portion is received in the first groove and is welded to the magnetic conductive yoke, and a surface of the first welding portion facing away from the first groove does not extend beyond a side surface of the second magnet extending along the first direction; And / or, the magnetic yoke is bent and extended toward the side of the second magnetic plate facing away from the voice coil to form the first welding portion, the second magnet and the second magnetic plate are provided with a first groove corresponding to the first welding portion, the first welding portion is accommodated in the first groove and is welded to the second magnetic plate, and the surface of the first welding portion facing away from the first groove does not exceed the surface of the second magnet and the second magnetic plate facing away from the voice coil.

3. The sound-generating device according to claim 1, wherein: The first side edge is bent and extended toward the first magnet to form the bent portion; wherein the bent portion includes one and is located in the middle area of ​​the first side edge; or, both ends of the first side edge along the third direction are bent and extended to form the bent portion, both bent portions are in limited contact with the first magnet, and the third direction is perpendicular to the first direction and the second direction respectively; And / or, each second side is bent and extended toward the first magnet to form the bent portion; wherein the bent portion includes one, and the bent portion is located at an end of the second side away from the voice coil; or the bent portion includes multiple, and the multiple bent portions are arranged at intervals along the first direction and are all in limited contact with the first magnet; And / or, the first magnet is provided with a positioning groove corresponding to the bent portion, the bent portion is accommodated in the positioning groove and is in limited contact with the first magnet.

4. The sound-generating device according to claim 1, wherein: Each of the first magnetic conductive plates further has a third side facing the magnetic gap, the third side is provided with a first stop portion, and the first stop portion is in limited contact with a side of the first magnet facing the magnetic gap; And / or, each of the second magnetic conductive plates has a third side wall facing the magnetic gap, the third side wall is provided with a second stop portion, and the second stop portion is in limited contact with a side of the second magnet facing the magnetic gap.

5. The sound-generating device according to claim 4, wherein: Each of the third sides is provided with a plurality of the first stop portions, the plurality of the first stop portions are arranged at intervals, and all of the first stop portions are in limited contact with the side of the first magnet facing the magnetic gap; or, each of the third sides is provided with a first stop portion at two corners along the third direction, and both of the two first stop portions are in limited contact with the side of the first magnet facing the magnetic gap, and the third direction is perpendicular to the first direction and the second direction respectively; And / or, the first stop portion is formed by bending and extending the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet; or, the first stop portion is a boss formed by recessing the corner portion of the first magnetic conductive plate on the side close to the magnetic gap toward the first magnet, and the boss is formed by the first magnetic conductive plate through a stamping and half-shearing process; And / or, a first limiting groove is provided on the side of each first magnet facing the magnetic gap corresponding to the first stop portion, the first stop portion is limited in the first limiting groove, and the surface of the first stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

6. The sound-generating device according to claim 4, wherein: Each of the third side walls is provided with a plurality of second stop portions, the plurality of second stop portions are spaced apart, and each of the second stop portions is in limited contact with a side of the second magnet facing the magnetic gap; or each of the third side walls is provided with a second stop portion at two corners along a third direction, and both of the second stop portions are in limited contact with a side of the second magnet facing the magnetic gap, and the third direction is perpendicular to the first direction and the second direction respectively; And / or, the second stop portion is formed by bending and extending the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet; or, the second stop portion is a boss formed by recessing the corner portion of the second magnetic conductive plate on the side close to the magnetic gap toward the second magnet, and the boss is formed by the second magnetic conductive plate through a stamping and half-shearing process; And / or, a second limiting groove is provided on the side of each second magnet facing the magnetic gap corresponding to the second stop portion, the second stop portion is limited in the second limiting groove, and the surface of the second stop portion facing the magnetic gap does not exceed the surface of the first magnet facing the magnetic gap.

7. The sound-generating device according to claim 1, wherein: The outer shell is a metal shell, and the outer shell is welded to the first magnetic conductive plate; And / or, the first magnet and the second magnet of each magnetic circuit assembly are magnetized along the second direction and in opposite directions, and the magnetization directions of the two first magnets and the two second magnets facing each other along the first direction are opposite.

8. The sound generating device according to any one of claims 1 to 7, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate connected to the diaphragm, and the vibration plate is connected to the voice coil; The outer shell includes a connected annular bracket and a bottom shell, the periphery of the diaphragm is combined with the inner wall of the annular bracket, and the diaphragm and the annular bracket are integrally hot-pressed or injection-molded, the bottom shell is a metal shell, the bottom shell includes an annular body and a side wall connected to the annular body, the side wall has a receiving hole, the magnetic circuit assembly extends to the receiving hole, and the first magnetic plate is welded to the annular body on the side facing away from the magnetic yoke.

9. The sound generating device according to any one of claims 1 to 7, characterized in that: The vibration system further includes a frame and a centering support, wherein the frame includes two frames and is respectively provided at both ends of the voice coil along a third direction, the frame connecting the voice coil and the diaphragm assembly, and the third direction is perpendicular to the first direction and the second direction respectively; There are two centering supports, which are distributed at both ends of the voice coil corresponding to the frame. Each centering support includes an outer fixing portion, an inner fixing portion, and an elastic arm connecting the outer fixing portion and the inner fixing portion. Each inner fixing portion is connected to one of the frames and has an inner solder pad electrically connected to the lead of the voice coil. The housing is provided with a relief opening corresponding to each of the external fixing parts, each of the external fixing parts is passed through the relief opening and provided with an external soldering pad, and the magnetic yoke is bent and extended toward the external fixing part corresponding to each of the relief openings to form a positioning protrusion.

10. An electronic device, characterized in that: The electronic device includes the sound emitting device according to any one of claims 1 to 9.

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