Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electro-acoustic transduction, the sound production device comprises a shell, a magnetic circuit system, a vibration system and a supporting piece, the vibration system is arranged on one side of the magnetic circuit system, the vibration system comprises a vibrating diaphragm, a framework, a voice coil and a centering disk, the vibrating diaphragm is connected with the shell and the framework, one end of the voice coil is connected with the framework, and the other end of the voice coil is connected with the supporting piece. The framework is provided with a magnetic material coating as a first magnetic attraction part, and the centering disk is connected with one end, far away from the vibrating diaphragm, of the framework and the shell respectively; at least part of the supporting piece is located on the side, opposite to the magnetic circuit system, of the vibrating diaphragm and provided with a permanent magnet serving as a second magnetic attraction part, first attraction force exists between the first magnetic attraction part and the second magnetic attraction part, second attraction force exists between the first magnetic attraction part and the magnetic circuit system, and in the non-working state, the vibrating system is located at the balance position under the action of the first attraction force and the second attraction force. According to the technical scheme, the low-frequency effect and the acoustic performance of the sound production device can be improved.

Description

Technical Field

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

[0002] In recent years, consumer electronic products have developed rapidly, and electronic devices such as smart phones and VR devices have been recognized by consumers and widely used. Those skilled in the art have also made corresponding improvements to related supporting products such as speakers to meet the sound performance requirements of electronic products and meet the needs of consumers for product performance.

[0003] The sound-generating device is an important electroacoustic transducer component in electronic products, and is widely used as a speaker, receiver, earphone, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend. In theory, the low-frequency loudness of the sound-generating device is closely related to the maximum amount of air that its vibration system can push (the product of the maximum amplitude and the effective vibration area). In order to meet the requirements of acoustic performance, a larger vibration space needs to be reserved to meet the large amplitude requirements.

[0004] As the requirements for electronic devices to be thinner and lighter become higher and higher, the assembly space left for micro sound devices in electronic devices is getting smaller and smaller. When a larger vibration space is reserved, the space available for installing the magnetic circuit system is also relatively smaller, resulting in a reduction in the volume of the magnets in the magnetic circuit system, thereby reducing the BL value of the product. As a result, even if a larger vibration space is reserved, it is difficult for the diaphragm to reach the maximum amplitude, affecting the acoustic performance of the sound device. Summary of the invention

[0005] The main purpose of the present invention is to propose a sound-generating device and an electronic device, which aims to introduce static magnetic force into the vibration system by setting a first magnetic attraction part and a second magnetic attraction part, and reduce the stiffness of the vibration system by static magnetic force, so as to greatly improve the low-frequency effect of the sound-generating device. By connecting the voice coil and the centering support plate with a skeleton, the volume of the magnet in the magnetic circuit system can be increased, the BL value of the product can be increased, and the acoustic performance of the sound-generating device can be improved.

[0006] To achieve the above object, the sound-generating device proposed by the present invention comprises:

[0007] shell;

[0008] A magnetic circuit system, the magnetic circuit system comprising a central magnetic portion and a side magnetic portion arranged at intervals, wherein the central magnetic portion and the side magnetic portion are arranged at intervals to form a magnetic gap;

[0009] A vibration system, wherein the vibration system is arranged on one side of the magnetic circuit system, the vibration system comprises a diaphragm, a skeleton, a voice coil and a centering support, wherein the outer edge of the diaphragm is connected to the housing, the inner edge of the diaphragm is connected to the skeleton, one end of the voice coil is connected to the skeleton, the other end of the voice coil is arranged corresponding to the magnetic gap, the centering support is opposite to the diaphragm and arranged at intervals, one end of the centering support is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support is connected to the housing; and

[0010] A support member, at least a portion of which is located on a side of the vibration system facing away from the magnetic circuit system;

[0011] In which, the skeleton is provided with a first magnetic attraction part, the first magnetic attraction part includes a magnetic material coating arranged on the surface of the skeleton, the support member is provided with a second magnetic attraction part, the second magnetic attraction part is a permanent magnet, there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, there is a second attraction force between the first magnetic attraction part and the magnetic circuit system, and in a non-working state, the vibration system is located in a balanced position between the second magnetic attraction part and the magnetic circuit system under the action of the combined force of the first attraction force and the second attraction force.

[0012] In one embodiment, the first magnetic attraction portion is disposed on a surface of the frame facing the second magnetic attraction portion;

[0013] And / or, the first magnetic attraction portion is arranged on a surface of the skeleton facing the magnetic circuit system.

[0014] In one embodiment, the skeleton includes a main body structure and at least two connecting structures, the main body structure is connected to the diaphragm, one end of the connecting structure is connected to the main body structure, and the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected to the centering support plate, and the magnetic material coating is provided on the surface of the main body structure.

[0015] In one embodiment, the main body structure and the connecting structure are integrally formed; or, the main body structure and the connecting structure are separate structures connected to each other;

[0016] And / or, the sound-generating device has two short sides arranged oppositely and two long sides arranged oppositely, and the frame includes two connecting structures, and the two connecting structures are respectively arranged correspondingly on the two short sides or the two long sides;

[0017] And / or, a recessed portion is provided on one side of the main body structure facing the second magnetic attraction portion, the recessed portion is formed by the frame being recessed toward the central magnetic portion, and the first magnetic attraction portion is provided in the recessed portion;

[0018] Or, the main body structure is provided with a hollow hole, the frame further includes a ball top portion, the ball top portion is provided on the main body structure and covers the hollow hole, and the first magnetic attraction portion is provided on the ball top portion;

[0019] And / or, part of the main body structure is recessed and extends toward a direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected to the connecting frame.

[0020] In one embodiment, the edge magnet portion includes a stacked edge magnet and an edge magnetic conductive plate, and the edge magnetic conductive plate is disposed on a side of the edge magnet facing the vibration system;

[0021] The centering support plate is arranged on a side of the edge magnetic conductive plate facing away from the diaphragm, and a gap is provided between at least part of the edge magnetic conductive plate and the shell, and the connecting structure is passed through the gap.

[0022] In one embodiment, the side magnetic conductive plate and the housing are integrally provided; or, the side magnetic conductive plate and the housing are separate structures connected to each other;

[0023] And / or, a first avoidance opening is provided on the side of the magnetic conductive plate facing the notch;

[0024] And / or, the edge of the side magnet is provided with a second avoidance opening for avoiding the connection structure.

[0025] In one embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, the connection structure includes a first extension portion and a second extension portion, two ends of the first extension portion are respectively connected to the body structure and the second extension portion, at least a portion of the first extension portion extends along the vibration direction of the vibration system, and the second extension portion is arranged at an angle with the first extension portion and is connected to the centering support plate;

[0026] The lead portion is arranged along the connecting structure, and includes a first lead wire routed along the first extension portion and a second lead wire routed along the second extension portion. The centering support piece is provided with a conductive portion, and the second lead wire is connected to the conductive portion.

[0027] In one embodiment, the voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, the frame also includes a conductive layer, the centering support plate is provided with a conductive portion, and the lead portion and the conductive portion are electrically connected to the conductive layer respectively.

[0028] In one embodiment, the conductive layer is provided on the connecting structure, or the conductive layer is provided on the main structure and the connecting structure respectively;

[0029] And / or, the conductive layer is provided on the outer surface of the skeleton;

[0030] Alternatively, at least a portion of the frame is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injection-molded inside the plastic structure.

[0031] In one embodiment, the voice coil comprises a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, and the centering support is provided with a conductive portion;

[0032] The main body structure is an insulating material part, the connecting structure is a metal part, and the connecting structure is electrically connected to the conductive part and the lead part respectively;

[0033] Alternatively, the skeleton includes two components made of metal materials, at least part of the connecting structure and part of the main body structure form the components, the two components are arranged separately, and each component is electrically connected to the conductive part and the lead part.

[0034] In one embodiment, there are two centering support plates, one of which is provided with two conductive parts; or each of the centering support plates is provided with a conductive part;

[0035] The voice coil comprises a voice coil body and two lead parts connected to the voice coil body. The voice coil body is connected to the frame, and each of the lead parts is electrically connected to one of the conductive parts.

[0036] In one embodiment, a storage space is defined between the housing and the magnetic circuit system, the centering support comprises a first connection portion, an elastic portion, and a second connection portion connected to each other, the first connection portion is connected to the housing, the elastic portion and the second connection portion are located in the storage space, and the frame is connected to the second connection portion;

[0037] And / or, there are two centering support plates, and the two centering support plates are arranged on opposite sides of the frame.

[0038] In one embodiment, the magnetic circuit system further includes a magnetic yoke, the magnetic yoke includes a main body and a bent portion arranged on the outer periphery of the main body, the central magnetic portion and the edge magnetic portion are both arranged on a side of the main body opposite to the vibration system, the bent portion is bent and extended relative to the main body toward a direction close to the vibration system, and the bent portion, the housing and the edge magnetic portion jointly define a storage space for arranging at least part of the centering support piece;

[0039] And / or, the central magnetic part includes a central magnet and a central magnetic conductive plate which are stacked, the central magnetic conductive plate is located on a side of the central magnet facing the vibration system, and along the vibration direction of the vibration system, the central magnetic conductive plate is provided with a recessed area corresponding to the first magnetic attraction part;

[0040] Part of the central magnetic conductive plate is recessed in a direction away from the vibration system to form the recessed area; or, the recessed area is a through hole structure penetrating the central magnetic conductive plate.

[0041] In one embodiment, the second attraction force exists between the first magnetic attraction portion and the central magnetic portion, and the magnetization direction of the second magnetic attraction portion is opposite to the magnetization direction of the central magnetic portion;

[0042] And / or, the second magnetic attraction portion is provided on a side of the support member facing the first magnetic attraction portion;

[0043] And / or, the second magnetic attraction portion is arranged on a side of the support member facing away from the first magnetic attraction portion;

[0044] And / or, a mounting cavity is provided in the support member, and the second magnetic attraction portion is provided in the mounting cavity;

[0045] And / or, the second magnetic attraction portion is circular, elliptical or polygonal;

[0046] And / or, the second magnetic attraction portion is arranged opposite to the first magnetic attraction portion;

[0047] And / or, a mounting groove is provided on a side of the support member facing the diaphragm, and the second magnetic attraction portion is provided in the mounting groove;

[0048] And / or, at least two second magnetic attraction parts are provided, and at least two second magnetic attraction parts are provided on the same side or different sides of the support member.

[0049] In one embodiment, the sound-generating device is provided with a front cover, which is located on a side of the vibration system facing away from the magnetic circuit system, the front cover forms the support, and the outer edge of the diaphragm is connected between the front cover and the housing.

[0050] In one embodiment, the sound-generating device includes a module shell, the module shell includes a module upper shell and a module lower shell covering each other, the module upper shell and the module lower shell enclose an installation space, the magnetic circuit system and the vibration system are arranged in the installation space, the module upper shell is located on the side of the vibration system facing away from the magnetic circuit system, the module upper shell forms the support member, and the second magnetic attraction part is arranged on the module upper shell.

[0051] The present invention further provides an electronic device, comprising the sound-generating device as described in any of the above embodiments.

[0052] According to the technical solution of the present invention, a magnetic material coating is arranged on the skeleton of the vibration system of the sound-generating device as a first magnetic attraction part, and a support is arranged on the side of the vibration system facing away from the magnetic circuit system, and a second magnetic attraction part is arranged on the support, so that a first attraction force exists between the first magnetic attraction part and the second magnetic attraction part, and a second attraction force exists between the first magnetic attraction part and the magnetic circuit system. In this way, the first magnetic attraction part is utilized to interact with the second magnetic attraction part of the support and the magnetic circuit system respectively, and a static magnetic force is introduced into the vibration system, thereby effectively reducing the strain recovery force of the vibration system during movement, and reducing the stiffness of the vibration system by the static magnetic force, so that the compliance of the vibration system is better, thereby greatly improving the low-frequency effect of the sound-generating device.

[0053] In the present invention, the voice coil and the centering support plate are connected by a skeleton in the vibration system. With such an arrangement, there is no need to extend the centering support plate to the position of the voice coil, so that the magnetic circuit system does not need to avoid the centering support plate in the vibration direction of the vibration system, thereby increasing the magnet setting volume of the magnetic circuit system, increasing the magnetic field strength of the magnetic circuit system acting on the vibration system, and increasing the BL value of the product, so as to enhance the sensitivity of the sound-generating device, thereby improving the performance of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0055] Figure 1 A cross-sectional view of a first embodiment of a sound-generating device provided by the present invention;

[0056] Figure 2 for Figure 1 A cross-sectional view of the sound-generating device from another perspective;

[0057] Figure 3 for Figure 1 An exploded view of the sound-generating device;

[0058] Figure 4 for Figure 1 Coordination structure diagram of the middle frame and the centering support piece;

[0059] Figure 5 A cross-sectional view of a second embodiment of the sound-generating device provided by the present invention;

[0060] Figure 6 for Figure 5 A cross-sectional view of the sound-generating device from another perspective;

[0061] Figure 7 An exploded view of a third embodiment of the sound-generating device provided by the present invention;

[0062] Figure 8 An exploded view of a fourth embodiment of a sound-generating device provided by the present invention;

[0063] Fig. 9 for Figure 8 The matching structure diagram of the voice coil, connection structure and centering support of the middle sound device;

[0064] Fig.10 A cross-sectional view of a fifth embodiment of the sound-generating device provided by the present invention;

[0065] Fig.11 for Fig.10 The matching structure diagram of the voice coil, frame and centering support of the central sound device;

[0066] Fig.12 It is a structural diagram of an embodiment of a skeleton in a sound-generating device of the present invention;

[0067] Fig.13 An exploded view of two assembly parts of a frame of a sound-generating device according to the present invention;

[0068] Fig.14 An exploded view of two assembly parts of another embodiment of the framework of the sound-generating device of the present invention;

[0069] Fig.15 It is a structural diagram of an embodiment of a centering support plate in a sound-generating device of the present invention;

[0070] Fig.16 This is a diagram showing the matching structure of the housing and the side magnetic conductive plate in one embodiment of the sound-generating device of the present invention;

[0071] Fig.17 A static magnetostrictive force curve diagram of the vibration direction of the sound-generating device in one embodiment of the present invention;

[0072] Fig.18 is a stiffness curve diagram of the sound-generating device of the present invention and the prior art design;

[0073] Fig.19 This is a test diagram of the frequency response performance of the sound-generating device of the present invention and the existing design.

[0074] Description of Figure Numbers:

[0075] 100. Sound-generating device; 1. Shell; 2. Magnetic circuit system; 21. Central magnetic part; 211. Central magnet; 212. Central magnetic plate; 213. Concave area; 22. Side magnetic part; 221. Side magnet; 222. Side magnetic plate; 223. Notch; 224. First avoidance; 225. Second avoidance; 23. Magnetic yoke; 231. Main body; 232. Bend; 233. Accommodation space; 24. Magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Inner ring hole; 32. Frame; 321. Main body structure; 3211. Concave part; 3212. Hollow hole; 3213. Connecting frame; 322. Connecting structure; 3221. First extension part; 32 22. Second extension part; 3223. Third extension part; 323. First magnetic part; 324. Conductive layer; 325. Dome part; 326. Component part; 33. Voice coil; 331. Lead part; 3311. First lead; 3312. Second lead; 34. Centering support plate; 341. First connection part; 342. Elastic part; 3421. First elastic arm; 3422. Second elastic arm; 3423. Third elastic arm; 343. Second connection part; 35. Conductive adhesive; 4. Support member; 41. Second magnetic part; 42. Front cover; 421. Sound hole; 43. Module shell; 431. Module upper shell; 432. Module lower shell; 433. Installation space; 5. Mesh cloth.

[0076] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0080] The present invention proposes a sound-generating device 100, which can be used in electronic devices. The electronic devices may be, but are not limited to, smart watches, smart glasses, head-mounted display devices, mobile phones, speakers, computers, headphones, or televisions.

[0081] See also Figures 1 to 4 In one embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2, a vibration system 3 and a support member 4. The magnetic circuit system 2 includes a central magnetic portion 21 and a side magnetic portion 22 that are spaced apart. The central magnetic portion 21 and the side magnetic portion 22 are spaced apart to form a magnetic gap 24. The vibration system 3 is disposed on one side of the magnetic circuit system 2. The vibration system 3 includes a diaphragm 31, a skeleton 32, a voice coil 33 and a centering support 34. The outer edge of the diaphragm 31 is connected to the housing 1, the inner edge of the diaphragm 31 is connected to the skeleton 32, one end of the voice coil 33 is connected to the skeleton 32, the other end of the voice coil 33 is arranged corresponding to the magnetic gap 24, the centering support 34 is opposite to the diaphragm 31 and is spaced apart. One end of the centering support 34 is connected to one end of the skeleton 32 away from the diaphragm 31, and the other end of the centering support 34 is connected to the housing 1. At least a portion of the support member 4 is located on the side of the diaphragm 31 that faces away from the magnetic circuit system 2.

[0082] Among them, the skeleton 32 is provided with a first magnetic attraction part 323, the first magnetic attraction part 323 includes a magnetic material coating arranged on the surface of the skeleton 32, the support part 4 is provided with a second magnetic attraction part 41, the second magnetic attraction part 41 is a permanent magnet, there is a first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41, there is a second attraction force between the first magnetic attraction part 323 and the magnetic circuit system 2, and in the non-working state, the vibration system 3 is located in a balanced position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force.

[0083] In the embodiment of the present invention, the sound-emitting device 100 can be a sound-emitting unit used as a loudspeaker, and can be used in conjunction with the housing or other components of the electronic device to form a sound cavity; the sound-emitting device 100 can also be a sound-emitting module structure, for example, a module housing 43 is provided to accommodate other components of the sound-emitting device 100 and form a sound cavity, so that the sound-emitting device 100 can be used alone as a sound-emitting device.

[0084] The sound-generating device 100 includes a housing 1 and a magnetic circuit system 2 and a vibration system 3 that are arranged relatively to each other; the housing 1 can provide an installation base for other components of the sound-generating device 100, and is used to install, fix and support other components of the sound-generating device 100, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the housing 1. The housing 1 can be an integral structure, or it can be formed by the cooperation of multiple split structures. The housing 1 forms a cavity, and optionally, the housing 1 can be enclosed to form a closed cavity, or it can be enclosed to form a cavity with one end open or both ends through along the vibration direction; as in the illustrated embodiment, the housing 1 can be set as an annular frame or frame structure, for example, to form a square frame structure.

[0085] The magnetic circuit system 2 includes a central magnetic part 21 and a side magnetic part 22, wherein the side magnetic part 22 is arranged around the central magnetic part 21, so as to form a magnetic gap 24 between the central magnetic part 21 and the side magnetic part 22; wherein the side magnetic part 22 may be a closed loop structure, or may be composed of a plurality of sub-magnetic parts arranged at intervals along the circumference of the central magnetic part 21. It should be noted that the connection method of the magnetic circuit system 2 and the housing 1 may be to arrange a magnetic yoke 23 on the side of the magnetic circuit system 2 away from the vibration system 3, to connect the magnetic yoke 23 to the housing 1, and to fix both the central magnetic part 21 and the side magnetic part 22 on the magnetic yoke 23; or to connect the side magnetic part 22 to the housing 1, and the central magnetic part 21 is connected to the side magnetic part 22 through the magnetic yoke 23; in addition, an installation structure may be arranged on the side of the magnetic circuit system 2 away from the vibration system 3, and the installation structure may be a part of the housing 1, or may be an independent component connected to the housing 1, and the magnetic circuit system 2 may be fixed on the installation structure to connect to the housing 1.

[0086] The vibration system 3 includes a diaphragm 31 and a voice coil 33. The outer edge of the diaphragm 31 is connected to the housing 1. Optionally, the diaphragm 31 may include a folded ring portion, a fixed portion connected to the outer edge of the folded ring portion, and a central portion connected to the inner edge of the folded ring portion. The fixed portion is connected to the housing 1. The folded ring portion is a convex hull structure protruding toward the side of the magnetic circuit system 2 or a convex hull structure protruding toward the side away from the magnetic circuit system 2. The central portion may be a complete diaphragm, or an inner ring hole 311 may be provided. When the inner ring hole 311 is provided, the inner ring hole 311 may be closed by covering the inner ring hole 311 with a dome or a skeleton 32. The voice coil 33 is connected to the side of the diaphragm 31 facing the magnetic circuit system 2. The contour of the voice coil 33 is adapted to the magnetic gap 24. The end of the voice coil 33 away from the diaphragm 31 is arranged corresponding to the magnetic gap 24. It may be inserted in the magnetic gap 24 or located outside the magnetic gap 24.

[0087] In this embodiment, in order to improve the stability of the vibration system 3 during the vibration process and avoid polarization and other problems, the vibration system 3 is further provided with a centering support 34 and a skeleton 32, one end of the skeleton 32 is connected to the diaphragm 31, wherein the skeleton 32 mentioned in the embodiment of the present invention is connected to the inner edge of the diaphragm 31, and the skeleton 32 is connected to the middle area of ​​the diaphragm 31, such as the central part mentioned in the aforementioned embodiment. When the diaphragm 31 is a complete diaphragm structure, the skeleton 32 and the diaphragm 31 are stacked, and when an inner ring hole 311 is opened in the middle of the diaphragm 31, the skeleton 32 is connected to the edge area of ​​the inner ring hole 311. The setting of the skeleton 32 can be used to improve the structural strength of the middle area of ​​the diaphragm 31. The centering support 34 is arranged opposite to the diaphragm 31 and is located on the side of the diaphragm 31 facing the voice coil 33. The outer edge of the centering support 34 is connected to the housing 1. The end of the frame 32 away from the diaphragm 31 extends toward the centering support 34 and is connected to the centering support 34. The end of the voice coil 33 facing the diaphragm 31 is connected to the part of the frame 32 connected to the diaphragm 31, that is, the voice coil 33 is connected to the centering support 34 through the frame 32. The centering support 34 can be set as a spring sheet structure, or it can include a first connecting portion 341 connected to the housing 1 and an elastic portion 342 that can be elastically deformed as in the following embodiment; the centering support 34 can be elastically deformed with the vibration of the diaphragm 31 and the voice coil 33.

[0088] By connecting the centering support plate 34 and the voice coil 33 through the skeleton 32, there is no need to extend the centering support plate 34 to the voice coil 33 to connect with the voice coil 33. At this time, in the vibration direction of the vibration system 3, the magnetic circuit system 2 does not need to avoid the centering support plate 34, so the setting volume of the magnet in the magnetic circuit system 2 can be increased, so that the volume of the magnetic circuit system 2 is increased, which is beneficial to increase the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, increase the BL value of the product, and enhance the sensitivity of the sound-generating device 100, thereby improving the performance of the sound-generating device 100.

[0089] The centering support 34 may be an annular structure arranged around the circumference of the voice coil 33; or a plurality of centering support plates 34 may be arranged around the circumference of the voice coil 33, in which case the centering support plates 34 may be connected to each other, or two adjacent centering support plates 34 may be arranged at intervals, for example, two centering support plates 34 may be arranged on opposite sides of the frame 32. The centering support plate 34 may be made of metal, plastic or other materials, or may be composed of structures of at least two different materials. In addition, in some embodiments, the centering support plate 34 may be made of a conductive material, or a conductive circuit may be provided on the centering support plate 34, so that the lead portion 331 of the voice coil 33 is electrically connected to the external circuit through the centering support plate 34, thereby improving the convenience of connecting the voice coil 33 to electricity.

[0090] Optionally, the skeleton 32 may be integrally formed, or may be composed of at least two separate structures connected to each other; the skeleton 32 may be made of metal, or other materials such as plastic or carbon fiber, or different structures of the skeleton 32 may be formed of at least two different materials, which is not specifically limited here.

[0091] Optionally, the outline of the magnetic gap 24 formed in the magnetic circuit system 2 can be set to be square, and the voice coil 33 of the vibration system 3 is also set to be square, so that the voice coil 33 corresponds to the magnetic gap 24; for example, the central magnetic part 21 and the side magnetic part 22 of the magnetic circuit system 2 are both set to be square, or the central magnetic part 21 can be square, the inner outline of the side magnetic part 22 is square, and the outer outline of the side magnetic part 22 can be circular or other shapes. In addition, the magnetic gap 24 formed by the magnetic circuit system 2 can also be circular, elliptical or other shapes.

[0092] In the embodiment of the present invention, a first magnetic attraction portion 323 is provided on the skeleton 32 of the vibration system 3, and the first magnetic attraction portion 323 is a magnetic material coating provided on the surface of the skeleton 32, wherein the magnetic material coating is a mixture of magnetic conductive material particles and an adhesive, and the magnetic conductive material particles are at least one of iron powder, nickel powder, manganese zinc ferrite powder, nickel zinc ferrite powder, neodymium iron boron powder, aluminum iron boron powder, iron silicon powder, and iron silicon aluminum powder, which are not limited here. The first magnetic attraction portion 323 can be provided on the surface of the skeleton 32 facing the magnetic circuit system 2, or on the surface of the skeleton 32 facing away from the magnetic circuit system 2, or on both the surface of the skeleton 32 facing the magnetic circuit system 2 and the surface facing away from the magnetic circuit system 2. The first magnetic attraction portion 323 is formed by using a magnetic material coating, so that the overall mass of the sound-generating device 100 can be relatively light. A support member 4 is provided on the side of the diaphragm 31 facing away from the magnetic circuit system 2. The support member 4 is spaced apart from the diaphragm 31. A second magnetic attraction portion 41 is provided on the support member 4. The second magnetic attraction portion 41 is provided as a permanent magnet such as a magnet. The support member 4 may be a part of the housing 1 or a structure connected to the housing 1, such as the front cover 42 in the following embodiment. When the sound-generating device 100 is provided as a module structure, the upper shell 431 of the module may also be used as the support member 4. Of course, the structure of the support member 4 is not limited to the aforementioned structural design form. The second magnetic attraction portion 41 may be connected to the support member 4, that is, the support member 4 is used to support and fix the second magnetic attraction portion 41. The second magnetic attraction portion 41 may be provided on the surface of the support member 4 or may be embedded in the support member 4, or the support member 4 itself may form the second magnetic attraction portion 41.

[0093] There is a first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41; there is a second attraction force between the first magnetic attraction part 323 and the magnetic circuit system 2. When the sound-generating device 100 is in a non-working state, the vibration system 3 is located at a balanced position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force; the total attraction force exerted on the first magnetic attraction part 323 can be used as a static magnetic force applied to the vibration system 3.

[0094] It can be understood that when the vibration system 3 is working, the resultant force of the first attraction and the second attraction is opposite to the direction of the strain recovery force of the vibration system 3 and is smaller than the strain recovery force of the vibration system 3; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first attraction and the second attraction is not greater than the stiffness of the vibration system 3, thereby making the vibration system 3 located at an equilibrium position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the resultant force of the first attraction and the second attraction. Specifically, when the vibration system 3 is working, the first magnetic attraction part 323 reciprocates between the second magnetic attraction part 41 and the magnetic circuit system 2. When the first magnetic attraction part 323 approaches the second magnetic attraction part 41, it moves away from the magnetic circuit system 2, the attraction between the first magnetic attraction part 323 and the second magnetic attraction part 41 increases, and the attraction between the first magnetic attraction part 323 and the magnetic circuit system 2 decreases, and the resultant force of the first attraction and the second attraction is toward the direction of the second magnetic attraction part 41. When the first magnetic attraction portion 323 approaches the magnetic circuit system 2 , it moves away from the second magnetic attraction portion 41 , the attraction between the first magnetic attraction portion 323 and the second magnetic attraction portion 41 decreases, and the attraction between the first magnetic attraction portion 323 and the magnetic circuit system 2 increases, and the combined force of the first attraction and the second attraction is directed toward the direction of the magnetic circuit system 2 .

[0095] In specific applications, taking the vibration of the vibration system 3 in the up and down directions as an example, the vibration system 3 moves upward when it moves in the direction close to the second magnetic attraction part 41, and moves downward when it moves in the direction close to the magnetic circuit system 2. When the vibration system 3 is not working, the vibration system 3 is located at the initial position. When the vibration system 3 is working, the voice coil 33 drives the diaphragm 31 to vibrate up and down, thereby the vibration system 3 vibrates up and down. When the vibration system 3 moves upward to above the initial position, the direction of the strain recovery force of the vibration system 3 is downward. At this time, the first suction force between the first magnetic attraction part 323 and the second magnetic attraction part 41 is greater than the second suction force between the first magnetic attraction part 323 and the magnetic circuit system 2. The combined force of the first suction force and the second suction force is upward and less than the strain recovery force of the vibration system 3. At this time, the combined force of the first suction force and the second suction force acts on the vibration system 3 to offset a part of the strain recovery force of the vibration system 3. When the vibration system 3 moves downward to below the initial position, the direction of the strain restoring force of the vibration system 3 is upward. At this time, the first suction force between the first magnetic suction part 323 and the second magnetic suction part 41 is smaller than the second suction force between the first magnetic suction part 323 and the magnetic circuit system 2. The combined force of the first suction force and the second suction force is downward and smaller than the strain restoring force of the vibration system 3. At this time, the combined force of the first suction force and the second suction force acts on the vibration system 3 to offset a part of the strain restoring force of the vibration system 3.

[0096] It should be noted that the first attraction between the first magnetic attraction part 323 and the second magnetic attraction part 41, and the second attraction between the first magnetic attraction part 323 and the magnetic circuit system 2 will change with the position of the vibration system 3, and the combined force of the first attraction and the second attraction exerted on the first magnetic attraction part 323, that is, the static magnetic force applied to the vibration system 3 is not fixed. During the vibration process of the vibration system 3, the static magnetic force applied to the vibration system 3 is proportional to the strain recovery force of the vibration system 3. In other words, the greater the distance that the vibration system 3 deviates from its initial position, the greater the static magnetic force applied to the vibration system 3. The smaller the distance that the vibration system 3 deviates from its initial position, the smaller the static magnetic force applied to the vibration system 3; the static magnetic force is manifested as follows: Fig.17 shown.

[0097] Specifically, the system stiffness Kms consists of two parts: the stiffness Km of the vibration system 3 and the stiffness Kb of the cavity, that is, Kms=Km+Kb. Taking into account that the static magnetic force is related to the position of the vibration system 3, similar to the system stiffness Kms, the stiffness generated by the static magnetic force is defined as Kt, Kt=static magnetic force / displacement in the vibration direction. At this time, the total stiffness of the system becomes: Kms=Km+Kb-Kt, where Kms is the system stiffness, Km is the stiffness of the vibration system 3, and Kb is the cavity stiffness. At this time, as the displacement increases, the system stiffness decreases, that is, the larger the amplitude, the "softer" the system is, and it "matches" the trend of the BL(x) curve, and the low-frequency performance is higher, such as Fig.18 and Fig.19 shown.

[0098] Therefore, by introducing the first magnetic attraction part 323 into the vibration system 3, the vibration system 3 is affected by the static magnetic force of the magnetic circuit system 2 and the second magnetic attraction part 41, and the stiffness of the vibration system 3 is reduced by the static magnetic force, so that the compliance of the vibration system 3 is better, and the amplitude of the vibration system 3 can be increased, thereby improving the low-frequency effect of the sound-generating device 100.

[0099] That is, the technical solution of the present invention is to set a magnetic attraction material coating as the first magnetic attraction part 323 on the skeleton 32 of the vibration system 3 of the sound-generating device 100, and set a support 4 on the side of the vibration system 3 facing away from the magnetic circuit system 2, and set a second magnetic attraction part 41 on the support 4, so that there is a first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41, and there is a second attraction force between the first magnetic attraction part 323 and the magnetic circuit system 2. In this way, the first magnetic attraction part 323 is used to interact with the second magnetic attraction part 41 of the support 4 and the magnetic circuit system 2 respectively, and a static magnetic force is introduced into the vibration system 3, thereby effectively reducing the strain recovery force of the vibration system 3 during the movement process, and reducing the stiffness of the vibration system 3 by the static magnetic force, so that the compliance of the vibration system 3 is better, thereby greatly improving the low-frequency effect of the sound-generating device 100.

[0100] In the present invention, the voice coil 33 and the centering support plate 34 are connected by the skeleton 32 in the vibration system 3. With this arrangement, there is no need to extend the centering support plate 34 to the position of the voice coil 33, so that the magnetic circuit system 2 does not need to avoid the centering support plate 34 in the vibration direction of the vibration system 3, thereby increasing the magnet setting volume of the magnetic circuit system 2, increasing the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, and increasing the BL value of the product, so as to enhance the sensitivity of the sound-generating device 100, thereby improving the performance of the sound-generating device 100.

[0101] See also Figure 1 In one embodiment, the first magnetic attraction portion 323 is disposed on a surface of the skeleton 32 facing the second magnetic attraction portion 41 ; and / or, the first magnetic attraction portion 323 is disposed on a surface of the skeleton 32 facing the magnetic circuit system 2 .

[0102] In this embodiment, the first magnetic attraction portion 323 can be set on the surface of the skeleton 32 facing the magnetic circuit system 2, or on the surface of the skeleton 32 facing away from the magnetic circuit system 2, or a magnetic material coating can be set on both the surface of the skeleton 32 facing the magnetic circuit system 2 and the surface of the skeleton 32 facing away from the magnetic circuit system 2 to increase the static magnetic force on the vibration system 3, which is not limited here.

[0103] See also Figure 1 and Figure 4 In one embodiment, the skeleton 32 includes a main body structure 321 and at least two connecting structures 322. The main body structure 321 is connected to the diaphragm 31. One end of the connecting structure 322 is connected to the main body structure 321. The other end of the connecting structure 322 is bent and extended in a direction away from the diaphragm 31 to be connected to the centering support plate 34. The magnetic material coating is provided on the surface of the main body structure 321.

[0104] In this embodiment, the skeleton 32 includes a main body structure 321 connected to the diaphragm 31 and at least two connecting structures 322 connected to the main body structure 321; wherein the main body structure 321 may be an integral structure formed in one piece, or may be formed by connecting at least two separate structures; two, three, four or more connecting structures 322 may be provided, and each connecting structure 322 is respectively connected to the centering support plate 34; optionally, each connecting structure 322 of the skeleton 32 is evenly distributed along the circumference of the main body structure 321. The connecting structure 322 may be integrally formed with at least part of the main body structure 321, for example, the skeleton 32 may be an integrally formed structure as a whole, or the main body structure 321 may include at least two mutually connected structures, and the connecting structure 322 may be integrally formed with a part of the main body structure 321. In addition, the connecting structure 322 may be provided separately from the main body structure 321, and the connecting structure 322 may be connected to the main body structure 321. In some embodiments, part of the connection structure 322 can be integrally formed with the main body structure 321, and another part of the connection structure 322 and the main body structure 321 can be configured as a split structure connected to each other. Taking the configuration of two connection structures 322 as an example, one of the connection structures 322 and the main body structure 321 is integrally formed, and the other connection structure 322 and the main body structure 321 are configured as a split structure connected to each other.

[0105] In this embodiment, a magnetic material coating is disposed on the surface of the main structure 321 as the first magnetic attraction portion 323, so that the static magnetic force exerted on the first magnetic attraction portion 323 can better act on the middle area of ​​the diaphragm 31, so that the force of the vibration system 3 is balanced and polarization problems are avoided.

[0106] See also Figure 4 In one embodiment, the main body structure 321 and the connecting structure 322 are integrally formed.

[0107] In this embodiment, the skeleton 32 can be an integrally formed structure, or the main body structure 321 can include at least two mutually connected structures, and the connecting structure 322 is integrally formed with a part of the main body structure 321. The main body structure 321 and the connecting structure 322 are connected in an integrally formed manner, so that the connection strength between the main body structure 321 and the connecting structure 322 is high, the overall structural stability of the skeleton 32 is good, and the separation of the main body structure 321 and the connecting structure 322 can be well avoided, so that the centering support piece 34 can better stabilize the position and movement process of the vibration system 3 by fixing the skeleton 32.

[0108] See also Figure 8 and Fig. 9 In one embodiment, the main body structure 321 and the connection structure 322 are separate structures connected to each other.

[0109] This arrangement allows the main body structure 321 and the connecting structure 322 to be prepared separately, which is convenient for processing the main body structure 321 and the connecting structure 322, so as to facilitate structural design on the main body structure 321 and the connecting structure 322 respectively; in addition, the main body structure 321 and the connecting structure 322 can also be made of different materials to meet different needs. For example, the main body structure 321 can be made of plastic material, and the connecting structure 322 can be made of metal material for electrical connection with the lead portion 331 of the voice coil 33 and the centering support plate 34.

[0110] The connection method between the main body structure 321 and the connection structure 322 may be bonding, welding, etc., which is not limited here.

[0111] Combined with reference Figures 1 to 3 In one embodiment, the sound-generating device 100 has two short sides and two long sides that are arranged opposite to each other, and the frame 32 includes two connecting structures 322, and the two connecting structures 322 are respectively arranged on the two short sides or the two long sides.

[0112] In this embodiment, the sound-generating device 100 is roughly square, and the vibration system 3 and the magnetic circuit system 2 are all square or approximately square structures. The sound-generating device 100 has two short sides and two long sides that are relatively set. The skeleton 32 is provided with two connecting structures 322 that are respectively located on both sides of the main body structure 321, so that the two connecting structures 322 are symmetrically arranged to be connected to the centering support piece 34 respectively; at this time, the two connecting structures 322 can be respectively arranged in the areas of the two short sides, or the two connecting structures 322 can be respectively arranged in the areas of the two long sides; this arrangement method can make the skeleton 32 evenly supported on the centering support piece 34, and during the vibration process of the vibration system 3, the elastic force of the centering support piece 34 on the voice coil 33 and the diaphragm 31 is relatively uniform, so that the vibration process is relatively stable and the risk of polarization is reduced. In addition, there is no need to set too many connecting structures 322 on the skeleton 32, which can simplify the structure of the skeleton 32, making the overall structure relatively simple and easy to install.

[0113] Combined with reference Figures 1 to 4 In one embodiment, a recessed portion 3211 is provided on one side of the main body structure 321 facing the second magnetic attraction portion 41 , the recessed portion 3211 is formed by the skeleton 32 being recessed toward the central magnetic portion 21 , and the first magnetic attraction portion 323 is provided in the recessed portion 3211 .

[0114] In this embodiment, a recessed portion 3211 is provided on one side of the main body structure 321 facing the first magnetic attraction portion 323, and the recessed portion 3211 is roughly a groove structure; the provision of the recessed portion 3211 can increase the gap between the first magnetic attraction portion 323 and the second magnetic attraction portion 41, thereby increasing the vibration space for the vibration system 3 to move toward the second magnetic attraction portion 41, reducing the risk of interference between the vibration system 3 and the second magnetic attraction portion 41, which is beneficial to increasing the amplitude of the vibration system 3 and improving the low-frequency effect and performance of the sound-generating device 100. Optionally, the first magnetic attraction portion 323 can be provided on the surface of the recessed portion 3211 facing the second magnetic attraction portion 41, or on the surface of the recessed portion 3211 facing the magnetic circuit system 2, or can be embedded in the recessed portion 3211; in addition, the first magnetic attraction portion 323 can also be provided on the ball top portion 325 provided on the recessed portion 3211, which will not be described in detail here.

[0115] See also Figure 7 In one embodiment, the main body structure 321 is provided with a hollow hole 3212 , the skeleton 32 further includes a ball top 325 , the ball top 325 is provided on the main body structure 321 and covers the hollow hole 3212 , and the first magnetic attraction portion 323 is provided on the ball top 325 .

[0116] In this embodiment, the partial skeleton 32 stacked with the diaphragm 31 is composed of a main body structure 321 and a ball top 325, wherein the ball top 325 covers the hollow hole 3212 opened by the main body structure 321, and the ball top 325 and the main body structure 321 can be connected by bonding or other methods, so that the ball top 325 and the main body structure 321 are sealed and connected to avoid the problem of air leakage at the position of the hollow hole 3212. The ball top 325 can be a planar structure, or the ball top 325 can have a convex arc surface. The first magnetic attraction part 323 is set on the ball top 325, and the first magnetic attraction part 323 can be set on the surface of the ball top 325 facing the second magnetic attraction part 41, or on the surface of the ball top 325 facing the magnetic circuit system 2, or embedded inside the ball top 325; in addition, the ball top 325 can also be made of a magnetic conductive material, so that the ball top 325 serves as the first magnetic attraction part 323.

[0117] In this embodiment, by setting up a split ball top 325 and a main body structure 321, it is convenient to control the setting area and area of ​​the first magnetic attraction part 323, so as to control the static magnetic force on the vibration system 3 and meet different product performance requirements. In addition, in this setting method, the main body structure 321 can also be set to other materials to meet performance requirements. For example, the main body structure 321 can be set to a metal material to improve the structural strength, and in some embodiments, it can also meet the conductivity requirements; in addition, the main body structure 321 can also be set to plastic or other materials to achieve at least one of the effects of reducing product quality, simplifying the structure, and facilitating manufacturing.

[0118] See also Figure 2 In one embodiment, a portion of the main body structure 321 is recessed and extends toward the direction close to the magnetic circuit system 2 to form a connecting frame 3213 , and one end of the voice coil 33 close to the diaphragm 31 is connected to the connecting frame 3213 .

[0119] In this embodiment, a connecting frame 3213 is provided on the surface of the body structure 321 facing the voice coil 33. The connecting frame 3213 can be formed by making the area of ​​the body structure 321 corresponding to the contour of the voice coil 33 as a whole concave toward the side of the voice coil 33, and a concave area 213 will be formed on the surface of the body structure 321 facing away from the voice coil 33. The connecting frame 3213 can also be only a convex structure formed on the surface of the body structure 321 facing the voice coil 33 to match the contour of the voice coil 33, and the surface of the body structure 321 facing away from the voice coil 33 can still be a plane. The setting of the connecting frame 3213 can adjust the relative position of the voice coil 33 and the magnetic gap 24 in the vibration direction, so that the voice coil 33 is located in an area with denser magnetic flux lines, thereby improving the BL value.

[0120] See also Figure 1 and Fig.16 In one embodiment, the edge magnetic portion 22 includes a stacked edge magnet 221 and an edge magnetic conductive plate 222, the edge magnetic conductive plate 222 is arranged on the side of the edge magnet 221 facing the vibration system 3; the centering support plate 34 is arranged on the side of the edge magnetic conductive plate 222 facing away from the diaphragm 31, and there is a gap 223 between at least part of the edge magnetic conductive plate 222 and the outer shell 1, and the connecting structure 322 is passed through the gap 223.

[0121] In this embodiment, the side magnetic part 22 in the magnetic circuit system 2 includes a side magnet 221 and a side magnetic conductive plate 222. The side magnetic conductive plate 222 is arranged on the side of the side magnet 221 facing the vibration system 3. The side magnet 221 and the side magnetic conductive plate 222 are both arranged around the central magnetic part 21. The setting of the side magnetic conductive plate 222 can gather the magnetic flux lines on the side of the magnetic circuit system 2 facing the vibration system 3, so that the magnetic field lines on the side of the vibration system 3 are concentrated, the leakage magnetic field is reduced, and the magnetic field strength is improved.

[0122] Along the vibration direction of the vibration system 3, the centering support piece 34 is located on the side of the side magnetic plate 222 facing away from the diaphragm 31, and the outer edge of the side magnetic plate 222 can be spaced apart from the shell 1 to form a gap 223; or part of the outer edge of the side magnetic plate 222 can be connected to the shell 1, and the other part of the outer edge of the side magnetic plate 222 can be spaced apart from the shell 1 to form a gap 223; or the gap 223 can be set on the side magnetic plate 222; the connection structure 322 of the skeleton 32 is penetrated through the gap 223 and connected to the centering support piece 34. In this arrangement, the centering support piece 34 does not need to be set on the side of the magnetic circuit system 2 facing the diaphragm 31. At this time, the magnetic circuit system 2 does not need to avoid the centering support piece 34 on the side adjacent to the diaphragm 31, and can be extended to the side close to the diaphragm 31 to increase the volume of the magnet in the magnetic circuit system 2, which is conducive to increasing the magnetic field strength, thereby improving the BL value; in some embodiments, the distance between the magnetic circuit system 2 and the diaphragm 31 can also be reduced, which is conducive to reducing the thickness of the sound-generating device 100.

[0123] See also Fig.16 In one embodiment, the side magnetic conductive plate 222 is integrally provided with the housing 1 .

[0124] In this embodiment, the side magnetic conductive plate 222 can be integrally injection molded with the outer shell 1. For example, the side magnetic conductive plate 222 is placed in a mold used for injection molding the outer shell 1, so that the outer shell 1 and the side magnetic conductive plate 222 can be connected when the outer shell 1 is injection molded. This connection method makes the connection strength between the side magnetic conductive plate 222 and the outer shell 1 higher, and the overall structural stability is good, and it is not easy to separate.

[0125] See also Figure 1 In one embodiment, the side magnetic conductive plate 222 and the housing 1 are separate structures connected to each other. The side magnetic conductive plate 222 can be fixed to the housing 1 by bonding, clamping, screw connection, etc. In this arrangement, the side magnetic conductive plate 222 and the housing 1 can be formed separately, which is convenient to manufacture and the assembly method is also more flexible.

[0126] See also Fig.16 In one embodiment, a first avoidance opening 224 is provided on the side of the edge magnetic conductive plate 222 facing the notch 223; the setting of the first avoidance opening 224 can reduce the risk of interference of the frame 32 with the edge magnetic conductive plate 222 when the vibration system 3 vibrates, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage caused by collision or friction between the frame 32 and the edge magnetic conductive plate 222.

[0127] See also Figure 3In one embodiment, the edge of the side magnet 221 is provided with a second avoidance opening 225 for avoiding the connection structure 322. The provision of the second avoidance opening 225 can reduce the risk of interference of the side magnet 221 with the skeleton 32 when the vibration system 3 vibrates, reduce interference, improve the stability of the vibration process of the vibration system 3, and avoid damage to the skeleton 32 and the side magnet 221 due to collision or friction with each other. Optionally, a first avoidance opening 224 can be provided on the side magnetic conductive plate 222, and a second avoidance opening 225 can be provided on the side magnet 221. The first avoidance opening 224 and the second avoidance opening 225 are provided correspondingly, so as to avoid collision or friction between the skeleton 32 and the side magnetic part 22 and affect the normal operation of the vibration system 3.

[0128] See also Fig.10 and Fig.11 In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body, the voice coil body is connected to the frame 32, the connection structure 322 includes a first extension portion 3221 and a second extension portion 3222, the two ends of the first extension portion 3221 are respectively connected to the body structure 321 and the second extension portion 3222, at least part of the first extension portion 3221 extends along the vibration direction of the vibration system 3, the second extension portion 3222 is arranged at an angle to the first extension portion 3221 and is connected to the centering support piece 34; the lead portion 331 is arranged in line along the connection structure 322, the lead portion 331 includes a first lead 3311 wired along the first extension portion 3221 and a second lead 3312 wired along the second extension portion 3222, the centering support piece 34 is provided with a conductive portion, and the second lead 3312 is connected to the conductive portion.

[0129] In this embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 extending outward from the voice coil body, one end of the voice coil body is connected to the frame 32, and the other end is arranged corresponding to the magnetic gap 24 of the magnetic circuit system 2; the lead portion 331 is electrically connected to the conductive portion of the centering support plate 34, and the conductive portion can be a pad provided on the centering support plate 34, so that the voice coil 33 can be connected to the external circuit through the centering support plate 34, and the lead portion 331 does not need to be extended outward, which facilitates the electrical connection of the voice coil 33 with the external circuit. Among them, the centering support plate 34 can be set to a conductive material such as metal, or a circuit layer can be set on the surface or inside of the centering support plate 34; the conductive portion can be a pad provided on the centering support plate 34, and the connection between the lead portion 331 and the conductive portion can be bonded by conductive glue 35, or can be welded by soldering to be electrically connected. There are usually two lead parts 331 , corresponding to two electrodes respectively. Two independent conductive parts can be provided on the centering support piece 34 , or two centering support pieces 34 can be provided to be connected to the two lead parts 331 respectively.

[0130] Among them, the connection structure 322 of the skeleton 32 includes a first extension portion 3221 and a second extension portion 3222 set at an angle. The first extension portion 3221 can be set as a straight extension structure, so that one end of the first extension portion 3221 is connected to the main body structure 321, and the other end extends toward the centering support piece 34 in a direction away from the diaphragm 31. The second extension portion 3222 is bent relative to the first extension portion 3221 and connected to the centering support piece 34; in some embodiments, the first extension portion 3221 can also be set as a bent structure, including a first section extending along the planar direction of the diaphragm 31 and a second section extending along the vibration direction. One end of the first section is connected to the main body structure 321, and the second section extends from the first section in a direction away from the diaphragm 31 and is connected to the centering support piece 34. Optionally, when the connection structure 322 and the main body structure 321 are configured as mutually connected split structures, a third extension portion 3223 extending along a partial circumference of the main body structure 321 can be provided at one end where the first extension portion 3221 is connected to the main body structure 321, so that the third extension portion 3223 is connected to the main body structure 321, thereby increasing the connection area and improving the connection strength.

[0131] In this embodiment, the lead portion 331 of the voice coil 33 includes a first lead 3311 and a second lead 3312 which are connected to each other. The first lead 3311 is arranged along the first extension portion 3221, and the second lead 3312 is arranged along the second extension portion 3222. Therefore, the lead portion 331 can be directly electrically connected to the conductive portion on the centering support plate 34 without setting a conductive circuit on the skeleton 32, thereby simplifying the structural design of the skeleton 32, and the skeleton 32 can be made of a lighter insulating material, thereby reducing the overall weight of the vibration system 3 and improving the vibration sensitivity of the vibration system 3.

[0132] Furthermore, the lead portion 331 of the voice coil 33 is arranged along the connecting structure 322, and the lead portion 331 does not directly cross over the top of the magnetic circuit system 2, so that the magnetic circuit system 2 does not need to avoid the lead portion 331 in the vibration direction of the vibration system 3, and the setting volume of the magnet in the magnetic circuit system 2 can be increased, which is conducive to increasing the magnetic field strength of the magnetic circuit system 2 acting on the vibration system 3, thereby improving the BL value of the product and improving the acoustic performance of the sound-generating device 100. In addition, the lead portion 331 can also move synchronously with the connecting structure 322 during the vibration of the vibration system 3, thereby avoiding the problem of collision and wire bonding between the lead portion 331 and the connecting structure 322, ensuring that the lead portion 331 is stably connected to the centering support plate 34, and the structural design is ingenious and reasonable, and the acoustic performance of the sound-generating device 100 is improved and relatively stable.

[0133] Optionally, the second lead 3312 and the second extension 3222 may be arranged at intervals along the vibration direction of the vibration system 3, so that the second lead 3312 and the second extension 3222 are respectively connected to two sides of the centering support 34 that are arranged opposite to each other. The second lead 3312 may also be arranged on the side of the second extension 3222, so that the second lead 3312 and the second extension 3222 are connected to the same side of the centering support 34.

[0134] See also Fig.12 In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body, the voice coil body is connected to the skeleton 32, the skeleton 32 also includes a conductive layer 324, the centering support plate 34 is provided with a conductive portion, and the lead portion 331 and the conductive portion are electrically connected to the conductive layer 324 respectively.

[0135] In this embodiment, a conductive layer 324 is provided on the frame 32, so that the lead portion 331 of the voice coil 33 and the centering support piece 34 are electrically connected to the conductive layer 324 respectively, so that the lead portion 331 of the voice coil 33 is electrically connected to the centering support piece 34 through the conductive layer 324, so that the electrical connection between the lead portion 331 and the centering support piece 34 is more convenient; and in this arrangement, the voice coil 33 does not need to lead out a longer lead portion 331, which can avoid the problem that the lead portion 331 is too long and may interfere with other components, ensure that the vibration system 3 can move stably, improve performance stability, and prevent the situation of disconnection due to the excessive length of the lead portion 331. Among them, the connection between the lead portion 331 and the frame 32 can be bonded by conductive glue 35, or can be electrically connected by welding. Optionally, the conductive part can be a pad provided on the centering support piece 34, and the centering support piece 34 and the frame 32 can also be connected by bonding or welding through a conductive adhesive 35. In addition, the centering support piece 34 and the frame 32 can also be connected to each other in a manner similar to a male and female plug-in connection, which is not limited here. Optionally, a metal wire, a metal conductive sheet or a conductive film can be provided on the surface of the frame 32 to form a conductive layer 324; a metal wire or a metal conductive sheet can also be provided inside the frame 32 of an insulating material to form a conductive layer 324.

[0136] The voice coil 33 is usually provided with two lead portions 331, which correspond to two electrodes respectively. In this embodiment, two independent conductive portions can be provided on the same centering support plate 34; when at least two centering support plates 34 are provided, conductive portions can also be provided on at least two of the centering support plates 34. The conductive layer 324 on the skeleton 32 forms two independent conductive circuits, so that each conductive circuit is electrically connected to a lead portion 331 and a centering support plate 34 respectively, wherein the two conductive circuits can be formed on two connecting structures 322 respectively, or can be provided at different positions of the skeleton 32 along its thickness direction, for example, the two conductive circuits can be provided on different surfaces of the skeleton 32 that are provided opposite to each other along the vibration direction, or one of the conductive circuits can be provided on the surface of the skeleton 32, and the other conductive circuit can be provided inside the skeleton 32. It should be noted that in this embodiment, the conductive layer 324 can be provided only on the connecting structure 322, or part of the conductive layer 324 can be provided on the main structure 321. The specific method is referred to the following description, which will not be repeated here.

[0137] See also Fig.12 In one embodiment, the conductive layer 324 is provided on the connection structure 322. At this time, the connection structure 322 can be set as an insulating part made of plastic or other insulating materials, or as a metal part; the conductive layer 324 can be set on the surface of the connection structure 322, or in the connection structure 322; for example, a conductive film is set on the surface of the connection structure 322 as the conductive layer 324, and when the connection structure 322 is set as an insulating material such as plastic, a metal wire or a metal conductive sheet can also be set inside the connection structure 322 to form the conductive layer 324. It should be noted that in this embodiment, the main body structure 321 can be set as an insulating material, or as a conductive material such as metal. The lead portion 331 of the voice coil 33 can extend to the connection structure 322 and be electrically connected to the conductive layer 324. Among them, the connection between the lead portion 331 and the connection structure 322 can be bonded by a conductive adhesive 35, or can be electrically connected by welding. Similarly, the centering support piece 34 and the connection structure 322 can also be connected by bonding or welding with the conductive adhesive 35. In addition, the centering support piece 34 and the connection structure 322 can also be connected to each other in a manner similar to male and female plug-in connection, which is not limited here.

[0138] In one embodiment, the conductive layer 324 is respectively arranged on the main body structure 321 and the connecting structure 322. In this arrangement, the conductive layer 324 extends from the main body structure 321 to the connecting structure 322, and the conductive layer 324 located on the connecting structure 322 can be electrically connected to the centering support piece 34, and the conductive layer 324 located on the main body structure 321 can be used to be electrically connected to the lead portion 331, so that the lead portion 331 does not need to be extended to the position of the connecting structure 322, the length of the lead portion 331 can be shortened, and the connection and conduction of the voice coil 33 and the skeleton 32 are more convenient. Among them, the connection between the lead portion 331 and the main body structure 321 can be bonded by conductive adhesive 35, or welded by soldering to be electrically connected. Similarly, the centering support piece 34 and the connecting structure 322 can also be connected by bonding or welding with conductive adhesive 35. In addition, the centering support piece 34 and the connecting structure 322 can also be connected to each other in a manner similar to male and female plug-in, which is not limited here.

[0139] See also Fig.12 In one embodiment, the conductive layer 324 is disposed on the outer surface of the skeleton 32; wherein the conductive layer 324 can be disposed only on the outer surface of the connection structure 322, or on the outer surface of the connection structure 322 and at least part of the main body structure 321; the skeleton 32 can be configured as an integrally formed metal structure or plastic structure. Providing the conductive layer 324 on the outer surface of the skeleton 32 can reduce the difficulty of setting the conductive layer 324, and can also facilitate the electrical connection of the conductive layer 324 with the centering support piece 34 and the lead portion 331. Wherein, when two conductive circuits are disposed on the surface of an integrally formed metal structure, an insulating layer needs to be disposed between the conductive layer 324 and the metal structure to prevent the two conductive circuits formed by the conductive layer 324 from being electrically connected through the metal component and causing a short circuit.

[0140] In one embodiment, at least part of the skeleton 32 is formed as a plastic structure, and the conductive layer 324 is formed as a conductive circuit layer injection-molded inside the plastic structure. The connection structure 322 of the skeleton 32 can be set as a plastic structure, and the conductive layer 324 can be set on the connection structure 322, or the entire skeleton 32 can be set as a plastic structure. The conductive layer 324 can be set only in the area of ​​the connection structure 322, or can be set on the main structure 321 and the connection structure 322 respectively. The method of setting the conductive layer 324 inside the plastic structure avoids the problem that the conductive layer 324 is directly exposed to the outside and is easily damaged, resulting in short circuit or poor conduction, and can also avoid problems such as leakage, thereby improving safety in use. The conductive structure can be set to extend from the surface of the skeleton 32 to the conductive circuit layer position, so that the lead portion 331 can be electrically connected to the conductive circuit layer through the conductive structure, and similarly, the centering support piece 34 can be electrically connected to the conductive circuit layer through the conductive structure. For example, a via hole may be opened on the surface of the skeleton 32, and a conductive coating may be provided on the hole wall of the via hole, or a conductive material may be filled in the via hole, which is not specifically limited here.

[0141] In one embodiment, the voice coil 33 includes a voice coil body and a lead portion 331 connected to the voice coil body, the voice coil body is connected to the frame 32, and the centering support plate 34 is provided with a conductive portion; the main body structure 321 is an insulating material piece, and the connecting structure 322 is a metal piece, and the connecting structure 322 is electrically connected to the conductive portion and the lead portion 331 respectively.

[0142] In this embodiment, the connection structure 322 is configured as a metal part, so that the connection structure 322 can conduct electricity, so that the two lead parts 331 of the voice coil 33 are electrically connected to the two conductive parts of the centering support plate 34 through the two connection structures 322, respectively, the connection is convenient, and the connection structure 322 is easy to manufacture. Among them, the main body structure 321 is configured as an insulating material part, which can prevent the two connection structures 322 connected to the main body structure 321 from being mutually conductive through the main body structure 321, thereby avoiding the problem of short circuit.

[0143] See also Fig.13 and Fig.14 In one embodiment, the skeleton 32 includes two components 326 made of metal material, at least part of the connecting structure 322 and part of the main body structure 321 form the component 326, the two components 326 are separately arranged, and each component 326 is electrically connected to the conductive part and the lead part 331 respectively.

[0144] In this embodiment, the main body structure 321 includes at least two split parts, and the two split parts are connected to the two connecting structures 322 one by one, so as to form two components 326; wherein, the split parts and the connecting structure 322 can be integrally formed, or can be split structures connected to each other, and the split parts and the connecting structure 322 are both made of metal materials, and the split parts and the connecting structure 322 are mutually conductive when connected to form the component 326. The two lead parts 331 of the voice coil 33 are electrically connected to the centering support plate 34 through the two components 326, respectively, so that the connection between the lead parts 331 and the centering support plate 34 is more convenient, and there is no need to set an overly long lead part 331, so as to avoid the interference of the lead part 331 with other structures. It should be noted that in this embodiment, the two components 326 can be bonded by insulating glue; or, the main body structure 321 can also include an insulating part, so that the two components 326 are connected to the insulating part respectively, so as to avoid the problem of short circuit caused by the electrical connection of the two components 326.

[0145] See also Figure 1 and Figure 3 In one embodiment, there are two centering support plates 34, one of which is provided with two conductive parts; or, each centering support plate 34 is provided with a conductive part; the voice coil 33 includes a voice coil body and two lead parts 331 connected to the voice coil body, the voice coil body is connected to the frame 32, and each lead part 331 is electrically connected to a conductive part.

[0146] In this embodiment, two centering supports 34 are provided in the vibration system 3. The two centering supports 34 are respectively provided on opposite sides of the frame 32. The two centering supports 34 can be connected end to end to form a ring structure, or the two centering supports 34 can be arranged at intervals. The voice coil 33 is usually provided with two lead parts 331 corresponding to two electrodes respectively; in this embodiment, conductive parts can be respectively provided on the two centering supports 34, so that the two lead parts 331 of the voice coil 33 are respectively electrically connected to the two conductive parts in a one-to-one correspondence; two independent conductive parts can also be provided on one of the centering supports 34, for example, the centering support 34 can include an insulating body and two conductive parts, and the two conductive parts are respectively formed on different surfaces of the insulating body or are arranged at intervals on the same surface of the insulating body, both of which can avoid the problem of short circuit caused by the electrical connection of the two conductive parts. The lead portion 331 and the conductive portion may be electrically connected in such a way that the lead portion 331 is directly electrically connected to the conductive portion, or the lead portion 331 and the conductive portion are electrically connected to the skeleton 32 respectively. The specific implementation method is referred to the aforementioned embodiment and will not be elaborated here.

[0147] Optionally, two centering supports 34 are arranged at intervals. For example, the sound-emitting device 100 has two short sides and two long sides that are arranged opposite to each other. The two centering supports 34 can be arranged on the two short sides or the two long sides respectively. This arrangement can make the vibration system 3 evenly stressed, and the magnetic circuit system 2 can extend in the direction where the centering supports 34 are not arranged, thereby increasing the width of the magnetic circuit system 2, which is beneficial to improving the magnetic field strength generated by the magnetic circuit system 2, thereby improving the BL value of the product and improving the acoustic performance of the product.

[0148] Combined with reference Figure 1 and Fig.15 In one embodiment, a receiving space 233 is defined between the shell 1 and the magnetic circuit system 2, and the centering support piece 34 includes a first connecting portion 341, an elastic portion 342 and a second connecting portion 343 that are connected to each other. The first connecting portion 341 is connected to the shell 1, the elastic portion 342 and the second connecting portion 343 are located in the receiving space 233, and the skeleton 32 is connected to the second connecting portion 343.

[0149] In this embodiment, at least part of the magnetic circuit system 2 is spaced apart from the inner wall of the housing 1 to form an accommodation space 233, and the centering support piece 34 is installed in the accommodation space 233, so that the magnetic circuit system 2 does not need to avoid the centering support piece 34 in the vibration direction of the vibration system 3, which is conducive to increasing the size of the magnetic circuit system 2 in the vibration direction of the vibration system 3, improving the magnetic field strength, and thus increasing the BL value of the product. The centering support piece 34 includes a first connecting portion 341, an elastic portion 342, and a second connecting portion 343 connected to each other. The first connecting portion 341 is connected to the housing 1, and the elastic portion 342 extends in a direction close to the magnetic circuit system 2. The second connecting portion 343 is located at one end of the elastic portion 342 away from the first connecting portion 341 and is connected to the skeleton 32. Among them, the elastic portion 342 can be set as an elastic cantilever extending in a straight line, or as an elastic arm extending in a bent manner, so that the elastic portion 342 can be bent and deformed when the vibration system 3 vibrates.

[0150] Optionally, the elastic portion 342 includes two first elastic arms 3421, two second elastic arms 3422 and a third elastic arm 3423, one end of the first elastic arm 3421 is connected to the first connecting portion 341, the second elastic arm 3422 is extended from the other end of the first elastic arm 3421 to the first connecting portion 341, both ends of the third elastic arm 3423 are respectively connected to one end of the two second elastic arms 3422 close to the first connecting portion 341, and the second connecting portion 343 is arranged on the third elastic arm 3423.

[0151] See also Figure 3 In one embodiment, there are two centering support plates 34 , and the two centering support plates 34 are disposed on opposite sides of the frame 32 .

[0152] In this embodiment, the vibration system 3 includes two centering support pieces 34 respectively arranged on both sides of the skeleton 32, so that the skeleton 32 can be provided with support force on both sides of the skeleton 32 that are arranged opposite to each other, so that the vibration system 3 is evenly stressed and maintains a balanced position to avoid polarization problems. In addition, in some embodiments, the centering support piece 34 is located in the accommodating space 233 defined by the side of the magnetic circuit system 2 and the housing 1, so that the magnetic circuit system 2 can be extended in the direction where the centering support piece 34 is not arranged, thereby increasing the width of the magnetic circuit system 2, which is conducive to improving the magnetic field strength generated by the magnetic circuit system 2, thereby improving the BL value of the product and improving the acoustic performance of the product.

[0153] See also Figures 1 to 3 In one embodiment, the magnetic circuit system 2 also includes a magnetic yoke 23, which includes a main body 231 and a bending portion 232 arranged on the outer periphery of the main body 231. The central magnetic portion 21 and the edge magnetic portion 22 are both arranged on the side of the main body 231 opposite to the vibration system 3. The bending portion 232 is bent and extended relative to the main body 231 toward the direction close to the vibration system 3. The bending portion 232, the outer shell 1 and the edge magnetic portion 22 jointly define a accommodating space 233 for arranging at least part of the centering support plate 34.

[0154] In this embodiment, the housing 1 has an opening at least on one side away from the vibration system 3, and the magnetic circuit system 2 further includes a magnetic yoke 23 covering the opening on the side, and the magnetic yoke 23 includes a main body 231 arranged on the side of the central magnetic part 21 and the side magnetic part 22 away from the vibration system 3 and a bent part 232 bent relative to the main body 231, and the bent part 232 extends from the main body 231 to the side close to the vibration system 3, and is arranged opposite to the housing 1, so that the end of the bent part 232 away from the main body 231 can be connected to the housing 1. The magnetic yoke 23 can be used to guide the transmission of magnetic flux lines, enclose the magnetic flux lines generated by the magnetic circuit system 2 inside the sound-generating device 100, reduce magnetic leakage, and increase the magnetic field strength acting on the voice coil 33, which is conducive to improving the BL value of the product and improving the acoustic performance of the product.

[0155] In this embodiment, the housing 1 and the bending portion 232 are spaced apart from at least part of the edge magnetic portion 22, so that the bending portion 232, the housing 1 and the edge magnetic portion 22 define a receiving space 233, and at least part of the centering support 34 can be set in the receiving space 233. For example, the edge of the centering support 34 can be connected between the bending portion 232 and the housing 1, so that part of the centering support 34 is located in the receiving space 233 for connection with the frame 32; in addition, the entire centering support 34 can also be set in the receiving space 233, which is not limited here. Among them, the bending portion 232 can be set around the main body 231, or it can be set only at a part of the edge of the main body 231.

[0156] See also Figures 1 to 3In one embodiment, the central magnetic portion 21 includes a stacked central magnet 211 and a central magnetic conductive plate 212, the central magnetic conductive plate 212 is located on the side of the central magnet 211 facing the vibration system 3, and along the vibration direction of the vibration system 3, the central magnetic conductive plate 212 is provided with a recessed area 213 corresponding to the first magnetic attraction portion 323; wherein a portion of the central magnetic conductive plate 212 is recessed in a direction away from the vibration system 3 to form the recessed area 213; or, the recessed area 213 is a through hole structure penetrating the central magnetic conductive plate 212.

[0157] In this embodiment, the central magnetic part 21 includes a stacked central magnet 211 and a central magnetic conductive plate 212, and the central magnetic conductive plate 212 is located on the side of the central magnet 211 facing the vibration system 3. The arrangement of the central magnetic conductive plate 212 can focus the magnetic flux lines of the magnetic circuit system 2 on the side facing the vibration system 3, so as to concentrate the magnetic field lines on the side of the vibration system 3, reduce magnetic leakage, and improve the magnetic field strength.

[0158] Among them, a recessed area 213 is provided on the surface of the central magnetic conductive plate 212 facing away from the vibration system 3, and the recessed area 213 is provided corresponding to the first magnetic attraction part 323, which can reduce the influence of the magnetic focusing effect of the central magnetic conductive plate 212 on the second attraction force, thereby effectively increasing the magnetic attraction force between the first magnetic attraction part 323 and the central magnet 211. It can be understood that the setting of the recessed area 213 is also conducive to avoiding the recessed part 3211 provided on the skeleton 32. Among them, the recessed area 213 can be a through hole or a notch structure that passes through the central magnetic conductive plate 212. Of course, the recessed area 213 can also be a groove structure formed by the central magnetic conductive plate 212 being recessed in the direction away from the diaphragm 31, which is not limited here.

[0159] Optionally, part of the central magnetic conductive plate 212 is recessed in a direction away from the diaphragm 31 to form a recessed area 213. Of course, in other embodiments, the recessed area 213 is a through-hole structure that penetrates the central magnetic conductive plate 212. The central magnetic conductive plate 212 is arranged in an integral ring shape, so that a recessed area 213 is formed in the center of the central magnetic conductive plate 212. In other embodiments, the central magnetic conductive plate 212 includes a plurality of central magnetic conductive plates 212, and the plurality of central magnetic conductive plates 212 are surrounded in a ring shape to form a recessed area 213.

[0160] In one embodiment, there is a second attraction force between the first magnetic attraction portion 323 and the central magnetic portion 21, and the magnetization direction of the second magnetic attraction portion 41 is opposite to that of the central magnetic portion 21; in this way, the magnetic flux lines generated by the second magnetic attraction portion 41 are opposite to the magnetic flux lines generated by the central magnetic portion 21 and repel each other, and the two parts of the magnetic flux lines pass through the voice coil 33 horizontally, thereby increasing the strength of the magnetic flux lines acting on the voice coil 33, increasing the BL value of the product, and further improving the sound sensitivity of the sound-generating device 100.

[0161] See also Figure 1In one embodiment, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing the first magnetic attraction portion 323; and / or, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing away from the first magnetic attraction portion 323; and / or, an installation cavity is provided in the support member 4, and the second magnetic attraction portion 41 is arranged in the installation cavity.

[0162] It can be understood that the second magnetic attraction portion 41 can be arranged on at least one side of the support member 4, that is, the second magnetic attraction portion 41 can be arranged on one side or two opposite sides of the support member 4. In this embodiment, the support member 4 has an upper surface and a lower surface arranged opposite to each other, and the lower surface faces the diaphragm 31. In this case, the second magnetic attraction portion 41 can be arranged on the upper surface; the second magnetic attraction portion 41 can also be arranged on the lower surface; the second magnetic attraction portion 41 can also be arranged on both the upper surface and the lower surface.

[0163] Of course, the second magnetic attraction portion 41 can also be disposed in the support member 4, that is, the second magnetic attraction portion 41 is embedded in the support member 4 or injection molded in the support member 4. In one embodiment, the support member 4 is provided with an installation cavity, and the second magnetic attraction portion 41 is disposed in the installation cavity.

[0164] In one embodiment, at least two second magnetic attraction portions 41 are provided, and the at least two second magnetic attraction portions 41 are provided on the same side or different sides of the support member 4 .

[0165] In this embodiment, two, three, four or more second magnetic attraction parts 41 may be provided. Among them, each second magnetic attraction part 41 may be provided on the same side of the support member 4 at the same time; for example, multiple second magnetic attraction parts 41 may be provided on the upper surface, the lower surface of the support member 4 at the same time or may be embedded in the support member 4. Each second magnetic attraction part 41 may also be provided on different sides of the support member 4, for example, two of the second magnetic attraction parts 41 may be provided on the upper surface and the lower surface of the support member 4, respectively.

[0166] Optionally, when multiple second magnetic attraction parts 41 are arranged on the same side of the support member 4, the multiple second magnetic attraction parts 41 are arranged in a spliced ​​manner. For example, two adjacent second magnetic attraction parts 41 among the multiple second magnetic attraction parts 41 are arranged closely together, that is, there is no gap. When multiple second magnetic attraction parts 41 are arranged on the same side of the support member 4, the multiple second magnetic attraction parts 41 are arranged at intervals. For example, there is a gap between two adjacent second magnetic attraction parts 41 among the multiple second magnetic attraction parts 41.

[0167] In one embodiment, the second magnetic attraction portion 41 is circular, elliptical or polygonal; that is, the shape of the second magnetic attraction portion 41 can be a polygonal structure such as a circular, elliptical, triangular, square, etc., which is not limited here. In order to ensure the balance of the magnetic attraction force between the second magnetic attraction portion 41 and the first magnetic attraction portion 323, the structure of the second magnetic attraction portion 41 can be a symmetrical structure or a regular structure, which is not limited here.

[0168] See also Figure 1 In one embodiment, the second magnetic attraction portion 41 is arranged opposite to the first magnetic attraction portion 323; such an arrangement can make the first magnetic attraction portion 323 preferably within the magnetic field range of the second magnetic attraction portion 41, thereby increasing the first attraction force between the first magnetic attraction portion 323 and the second magnetic attraction portion 41. In one embodiment, a mounting groove is provided on one side of the support member 4 facing the diaphragm 31, and the second magnetic attraction portion 41 is disposed in the mounting groove.

[0169] In one embodiment, a mounting groove is provided on a side of the support member 4 facing the diaphragm 31 , and the second magnetic attraction portion 41 is disposed in the mounting groove.

[0170] In this embodiment, the mounting groove may be a groove structure formed by a concave surface of one side of the support member 4, or a concave structure formed by a concave surface of one side of the support member 4 toward the other side surface, so that the other side surface is convex, which is not limited here. It can be understood that the mounting groove can be set on the lower surface of the support member 4. Of course, in other embodiments, the mounting groove can be set on the upper surface of the support member 4, which is not limited here.

[0171] See also Figures 1 to 3 In one embodiment, the sound generating device 100 is provided with a front cover 42 , which is located on the side of the vibration system 3 facing away from the magnetic circuit system 2 , the front cover 42 forms a support member 4 , and the outer edge of the diaphragm 31 is connected between the front cover 42 and the housing 1 .

[0172] In this embodiment, the sound-generating device 100 can be provided in a communication terminal device such as a mobile phone. The sound-generating device 100 can be used as a sound-generating unit of a handset. The front cover 42 of the sound-generating device 100 is at least partially located on the side of the vibration system 3 facing away from the magnetic circuit system 2, so that a vibration space is formed between the front cover 42 and the vibration system 3. The periphery of the front cover 42 is connected to the periphery of the vibration system 3. In order to facilitate the sound-generating device 100 to generate sound smoothly, a sound hole 421 connected to the vibration space can be provided in the front cover 42. Optionally, the sound hole 421 is arranged directly opposite to the diaphragm 31. In order to prevent dust, water vapor and other debris from entering the vibration space through the sound hole 421 and affecting the performance of the sound-generating device 100, the sound-generating device 100 also includes a mesh 5, and the mesh 5 covers the sound hole 421.

[0173] At the same time, the front cover 42 forms a support member 4 for installing the second magnetic attraction part 41. The second magnetic attraction part 41 can be set on the side of the front cover 42 facing the vibration system 3, or on the side of the front cover 42 facing away from the vibration system 3. The second magnetic attraction part 41 can also be installed in an installation cavity formed inside the front cover 42, which is not limited here.

[0174] See also Figure 5 and Figure 6In one embodiment, the sound-generating device 100 includes a module shell 43, and the module shell 43 includes a module upper shell 431 and a module lower shell 432 that cover each other. The module upper shell 431 and the module lower shell 432 enclose an installation space 433, and the magnetic circuit system 2 and the vibration system 3 are arranged in the installation space 433. The module upper shell 431 is located on the side of the vibration system 3 facing away from the magnetic circuit system 2. The module upper shell 431 forms a support member 4, and the second magnetic attraction portion 41 is arranged on the module upper shell 431.

[0175] In this embodiment, the sound-generating device 100 is provided with a module shell 43, and the module shell 43 forms an installation space 433 for accommodating the magnetic circuit system 2, the vibration system 3 and other at least partial structures of the sound-generating device 100, so that the sound-generating device 100 can be used alone as a sound-generating device.

[0176] In the embodiment of the present invention, in order to facilitate the disassembly and assembly of various components in the module shell 43, the module shell 43 includes a module upper shell 431 and a module lower shell 432 that cover each other, and the module upper shell 431 and the module lower shell 432 are detachably connected; the module upper shell 431 is located on the side of the vibration system 3 away from the magnetic circuit system 2, and serves as a support 4 for fixing the second magnetic attraction part 41. The second magnetic attraction part 41 can be arranged on the side of the module upper shell 431 facing the diaphragm 31, or on the side of the module upper shell 431 facing away from the diaphragm 31. The second magnetic attraction part 41 can also be installed in the installation cavity formed inside the module upper shell 431, which is not limited here.

[0177] In order to make the sound-emitting device 100 produce sound smoothly, the module upper shell 431 and the vibration system 3 cooperate with each other to form a front sound cavity, and the module shell 43 is provided with a sound outlet hole connecting the front sound cavity with the outside world. The sound outlet hole connecting the front sound cavity with the outside world can be opened on the module upper shell 431, or the module upper shell 431 and the module lower shell 432 can be spaced apart at some edges to form a sound outlet hole, which is not limited here.

[0178] The present invention also proposes an electronic device, which includes a sound-emitting device 100 as in any of the aforementioned embodiments. The specific structure of the sound-emitting device 100 refers to the aforementioned embodiments. Since the electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0179] The electronic device may be a mobile phone, MP3, MP4, tablet computer, earphone, wearable device, etc. In the electronic device, the sound-emitting device 100 may be assembled into the housing of the electronic device in the form of a module or in the form of a single body.

[0180] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: include: shell; A magnetic circuit system, the magnetic circuit system comprising a central magnetic portion and a side magnetic portion arranged at intervals, wherein the central magnetic portion and the side magnetic portion are arranged at intervals to form a magnetic gap; A vibration system, wherein the vibration system is arranged on one side of the magnetic circuit system, the vibration system comprises a diaphragm, a skeleton, a voice coil and a centering support, wherein the outer edge of the diaphragm is connected to the housing, the inner edge of the diaphragm is connected to the skeleton, one end of the voice coil is connected to the skeleton, the other end of the voice coil is arranged corresponding to the magnetic gap, the centering support is opposite to the diaphragm and arranged at intervals, one end of the centering support is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support is connected to the housing; and A support member, at least a portion of which is located on a side of the vibration system facing away from the magnetic circuit system; In which, the skeleton is provided with a first magnetic attraction part, the first magnetic attraction part includes a magnetic material coating arranged on the surface of the skeleton, the support member is provided with a second magnetic attraction part, the second magnetic attraction part is a permanent magnet, there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, there is a second attraction force between the first magnetic attraction part and the magnetic circuit system, and in a non-working state, the vibration system is located in a balanced position between the second magnetic attraction part and the magnetic circuit system under the action of the combined force of the first attraction force and the second attraction force.

2. The sound generating device according to claim 1, characterized in that: The first magnetic attraction portion is disposed on a surface of the frame facing the second magnetic attraction portion; And / or, the first magnetic attraction portion is arranged on a surface of the skeleton facing the magnetic circuit system.

3. The sound generating device according to claim 1, characterized in that: The skeleton includes a main body structure and at least two connecting structures, the main body structure is connected to the diaphragm, one end of the connecting structure is connected to the main body structure, and the other end of the connecting structure is bent and extended in a direction away from the diaphragm to be connected to the centering support plate, and the magnetic material coating is arranged on the surface of the main body structure.

4. The sound-generating device according to claim 3, characterized in that: The main body structure and the connecting structure are integrally formed; or the main body structure and the connecting structure are separate structures connected to each other; And / or, the sound-generating device has two short sides arranged oppositely and two long sides arranged oppositely, and the frame includes two connecting structures, and the two connecting structures are respectively arranged correspondingly on the two short sides or the two long sides; And / or, a recessed portion is provided on one side of the main body structure facing the second magnetic attraction portion, the recessed portion is formed by the frame being recessed toward the central magnetic portion, and the first magnetic attraction portion is provided in the recessed portion; Or, the main body structure is provided with a hollow hole, the skeleton further includes a ball top portion, the ball top portion is provided on the main body structure and covers the hollow hole, and the first magnetic attraction portion is provided on the ball top portion; And / or, part of the main body structure is recessed and extends toward a direction close to the magnetic circuit system to form a connecting frame, and one end of the voice coil close to the diaphragm is connected to the connecting frame.

5. The sound generating device according to claim 3, characterized in that: The edge magnet part includes a stacked edge magnet and an edge magnetic conductive plate, wherein the edge magnetic conductive plate is arranged on a side of the edge magnet facing the vibration system; The centering support plate is arranged on a side of the edge magnetic conductive plate facing away from the diaphragm, and a gap is provided between at least part of the edge magnetic conductive plate and the shell, and the connecting structure is passed through the gap.

6. The sound generating device according to claim 5, characterized in that: The side magnetic conductive plate and the housing are integrally arranged; or, the side magnetic conductive plate and the housing are separate structures connected to each other; And / or, a first avoidance opening is provided on the side of the magnetic conductive plate facing the notch; And / or, the edge of the side magnet is provided with a second avoidance opening for avoiding the connection structure.

7. The sound generating device according to claim 3, characterized in that: The voice coil comprises a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, the connection structure comprises a first extension portion and a second extension portion, two ends of the first extension portion are respectively connected to the body structure and the second extension portion, at least a portion of the first extension portion extends along the vibration direction of the vibration system, and the second extension portion is arranged at an angle with the first extension portion and is connected to the centering support plate; The lead portion is arranged along the connecting structure, and includes a first lead wire routed along the first extension portion and a second lead wire routed along the second extension portion. The centering support piece is provided with a conductive portion, and the second lead wire is connected to the conductive portion.

8. The sound generating device according to claim 3, characterized in that: The voice coil includes a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, the frame also includes a conductive layer, the centering support plate is provided with a conductive portion, and the lead portion and the conductive portion are electrically connected to the conductive layer respectively.

9. The sound-generating device according to claim 8, characterized in that: The conductive layer is disposed on the connecting structure, or the conductive layer is disposed on the main structure and the connecting structure respectively; And / or, the conductive layer is provided on the outer surface of the skeleton; Alternatively, at least a portion of the frame is formed as a plastic structure, and the conductive layer is formed as a conductive circuit layer injection-molded inside the plastic structure.

10. The sound generating device according to claim 3, characterized in that: The voice coil comprises a voice coil body and a lead portion connected to the voice coil body, the voice coil body is connected to the frame, and the centering support is provided with a conductive portion; The main body structure is an insulating material part, the connecting structure is a metal part, and the connecting structure is electrically connected to the conductive part and the lead part respectively; Alternatively, the skeleton includes two components made of metal materials, at least part of the connecting structure and part of the main body structure form the components, the two components are arranged separately, and each component is electrically connected to the conductive part and the lead part.

11. The sound generating device according to claim 1, characterized in that: There are two centering support plates, one of which is provided with two conductive parts; or each of the centering support plates is provided with a conductive part; The voice coil comprises a voice coil body and two lead parts connected to the voice coil body. The voice coil body is connected to the frame, and each of the lead parts is electrically connected to one of the conductive parts.

12. The sound generating device according to claim 1, characterized in that: An accommodation space is defined between the shell and the magnetic circuit system, the centering support plate includes a first connecting portion, an elastic portion, and a second connecting portion connected to each other, the first connecting portion is connected to the shell, the elastic portion and the second connecting portion are located in the accommodation space, and the frame is connected to the second connecting portion; And / or, there are two centering support plates, and the two centering support plates are arranged on opposite sides of the frame.

13. The sound generating device according to claim 1, characterized in that: The magnetic circuit system further includes a magnetic yoke, the magnetic yoke includes a main body and a bent portion arranged on the outer periphery of the main body, the central magnetic portion and the edge magnetic portion are both arranged on a side of the main body opposite to the vibration system, the bent portion is bent and extended relative to the main body toward a direction close to the vibration system, and the bent portion, the housing and the edge magnetic portion jointly define an accommodation space for arranging at least part of the centering support piece; And / or, the central magnetic part includes a central magnet and a central magnetic conductive plate which are stacked, the central magnetic conductive plate is located on a side of the central magnet facing the vibration system, and along the vibration direction of the vibration system, the central magnetic conductive plate is provided with a recessed area corresponding to the first magnetic attraction part; Part of the central magnetic conductive plate is recessed in a direction away from the vibration system to form the recessed area; or, the recessed area is a through hole structure penetrating the central magnetic conductive plate.

14. The sound generating device according to claim 1, characterized in that: The second attraction force exists between the first magnetic attraction portion and the central magnetic portion, and the magnetization direction of the second magnetic attraction portion is opposite to the magnetization direction of the central magnetic portion; And / or, the second magnetic attraction portion is provided on a side of the support member facing the first magnetic attraction portion; And / or, the second magnetic attraction portion is arranged on a side of the support member facing away from the first magnetic attraction portion; And / or, a mounting cavity is provided in the support member, and the second magnetic attraction portion is provided in the mounting cavity; And / or, the second magnetic attraction portion is circular, elliptical or polygonal; And / or, the second magnetic attraction portion is arranged opposite to the first magnetic attraction portion; And / or, a mounting groove is provided on a side of the support member facing the diaphragm, and the second magnetic attraction portion is provided in the mounting groove; And / or, at least two second magnetic attraction parts are provided, and at least two second magnetic attraction parts are provided on the same side or different sides of the support member.

15. The sound generating device according to any one of claims 1 to 14, characterized in that: The sound-generating device is provided with a front cover, which is located on the side of the vibration system facing away from the magnetic circuit system. The front cover forms the support member, and the outer edge of the diaphragm is connected between the front cover and the housing.

16. The sound generating device according to any one of claims 1 to 14, characterized in that: The sound-generating device includes a module shell, which includes a module upper shell and a module lower shell covering each other, the module upper shell and the module lower shell enclose an installation space, the magnetic circuit system and the vibration system are arranged in the installation space, the module upper shell is located on the side of the vibration system facing away from the magnetic circuit system, the module upper shell forms the support member, and the second magnetic attraction part is arranged on the module upper shell.

17. An electronic device, characterized in that: The electronic device comprises the sound generating device as claimed in any one of claims 1 to 16.

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