Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, and the sound production device comprises a housing, a magnetic circuit system, a vibration system and a supporting member. The vibrating 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, the voice coil is connected with the framework, the centering disk is connected with the framework and the shell, the framework is provided with at least two connecting structures, the centering disk is provided with conductive parts, and the connecting structures are electrically connected with the corresponding conductive parts and lead parts of the voice coil respectively; the framework is provided with a first magnetic attraction part, the supporting piece is provided with a second magnetic attraction part located on the side, opposite to the magnetic circuit system, of the vibrating diaphragm, 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. It 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, and use a skeleton to connect the voice coil and the centering support plate, which can increase the volume of the magnet in the magnetic circuit system, improve the BL value of the product, and further improve the acoustic performance of the sound-generating device; and the skeleton is electrically connected to the voice coil and the centering support plate respectively, so that the voice coil can be electrically connected to the centering support plate through the skeleton, shortening the extension length of the lead part, which is beneficial to reduce the risk of disconnection of the voice coil.

[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 plate, the outer edge of the diaphragm is connected to the shell, 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 plate is opposite to the diaphragm and arranged at intervals, one end of the centering support plate is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support plate is connected to the shell, the skeleton is provided with at least two separately provided connection structures, the connection structure is a metal part, the voice coil is provided with two lead parts, the centering support plate is provided with two conductive parts, and each of the connection structures is electrically connected to the corresponding lead part and conductive part respectively; and

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

[0011] In which, the skeleton is provided with a first magnetic attraction part, the support part is provided with a second magnetic attraction part, 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 connection structure includes a first connection arm and a second connection arm, the first connection arm is extended along a portion of the circumference of the voice coil, one end of the voice coil is connected to the first connection arm, one end of the second connection arm is connected to the first connection arm, and the other end of the second connection arm is bent and extended in a direction away from the diaphragm to be connected to the centering support plate;

[0013] And / or, the sound-generating device has two short sides arranged opposite to each other and two long sides arranged opposite to each other, and the frame includes two connecting structures, and the two connecting structures are respectively arranged on the two short sides or the two long sides.

[0014] In one embodiment, the skeleton further comprises a main body structure, the main body structure and the diaphragm are stacked, one end of the connecting structure is connected to the main body structure, and the first magnetic attraction portion is arranged on the main body structure;

[0015] And / or, the main body structure is provided with a hollow hole, the skeleton further comprises 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;

[0016] 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.

[0017] In one embodiment, the skeleton includes a first component and a second component which are separately arranged and both are made of metal materials, the first magnetic attraction portion is connected to at least one of the first component and the second component, along the vibration direction of the vibration system, the projection of the voice coil is located within the first component and the second component, at least part of the first component forms one of the connection structures, and at least part of the second component forms another of the connection structures.

[0018] In one embodiment, the first component includes a first support member and a first connecting member, and the second component includes a second support member and a second connecting member, wherein the first support member is insulated and connected to the second support member and are respectively arranged opposite to the central magnetic portion, and the first connecting member and the second connecting member are both bent and extended in a direction away from the diaphragm and are respectively connected to the corresponding conductive portions.

[0019] 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;

[0020] 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.

[0021] 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;

[0022] And / or, a first avoidance opening is provided on the side of the magnetic conductive plate facing the notch;

[0023] And / or, the edge of the side magnet is provided with a second avoidance opening for avoiding the connection structure.

[0024] In one embodiment, a accommodating space is defined between the shell and the magnetic circuit system, and the centering support plate includes a first connecting portion, an elastic portion, and a second connecting portion that are 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 accommodating space, and the skeleton is connected to the second connecting portion.

[0025] In one embodiment, there are two centering support plates, and the two centering support plates are arranged on opposite sides of the frame;

[0026] One of the centering support plates is provided with two of the conductive parts; or each of the centering support plates is provided with one of the conductive parts.

[0027] 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;

[0028] 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;

[0029] 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.

[0030] In one embodiment, the first magnetic attraction portion is a magnetic conductive sheet, and the material of the magnetic conductive sheet is SPCC or SUS430;

[0031] And / or, the first magnetic attraction portion is formed as a magnetic material coating provided on the surface of the skeleton;

[0032] And / or, at least a portion of the skeleton is made of a magnetic conductive material to form the first magnetic attraction portion;

[0033] And / or, the first magnetic attraction portion is embedded in the frame;

[0034] And / or, the first magnetic attraction portion is provided on a surface of the frame facing the second magnetic attraction portion;

[0035] And / or, the first magnetic attraction portion is arranged on a surface of the skeleton facing the magnetic circuit system.

[0036] In one embodiment, the second magnetic attraction portion is a magnet, 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;

[0037] And / or, the second magnetic attraction portion is provided on a side of the support member facing the first magnetic attraction portion;

[0038] And / or, the second magnetic attraction portion is arranged on a side of the support member facing away from the first magnetic attraction portion;

[0039] And / or, a mounting cavity is provided in the support member, and the second magnetic attraction portion is provided in the mounting cavity;

[0040] And / or, the second magnetic attraction portion is circular, elliptical or polygonal;

[0041] And / or, the second magnetic attraction portion is arranged opposite to the first magnetic attraction portion;

[0042] 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;

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The present invention further provides an electronic device, comprising the sound-generating device as described in any of the above embodiments.

[0047] The technical solution of the present invention is to arrange a first magnetic attraction part in the vibration system of the sound-generating device, and to arrange a support member on the side of the vibration system facing away from the magnetic circuit system, and to arrange a second magnetic attraction part on the support member, so that there is a first attraction force between the first magnetic attraction part and the second magnetic attraction part, and there is a second attraction force between the first magnetic attraction part and the magnetic circuit system. In this way, the first magnetic attraction part is used to interact with the second magnetic attraction part of the support member and the magnetic circuit system respectively, and a static magnetic force is introduced into the vibration system. Therefore, when the vibration system is working, part of the strain restoring force of the vibration system can be offset by the combined force of the first attraction force and the second attraction force, and the stiffness of the vibration system can be reduced by the static magnetic force, so that the compliance of the vibration system is better, thereby increasing the amplitude of the vibration system, so as to greatly improve the low-frequency effect of the sound-generating device.

[0048] The present invention connects the voice coil and the centering support plate through a skeleton in the vibration system. With such a configuration, it is not necessary 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 to improve the sensitivity of the sound-generating device, thereby improving the performance of the sound-generating device. At the same time, the lead portion of the voice coil is electrically connected to the conductive portion of the centering support plate through the connection structure of the skeleton, so that the voice coil can be electrically connected to the centering support plate through the skeleton, and the lead portion of the voice coil does not need to be extended outward, which is convenient for the voice coil to be connected to electricity, and can prevent the situation of disconnection due to the lead portion being too long. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 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.

[0050] Figure 1 A cross-sectional view of a first embodiment of a sound-generating device provided by the present invention;

[0051] Figure 2 for Figure 1 A cross-sectional view of the sound-generating device from another perspective;

[0052] Figure 3 for Figure 1 An exploded view of the sound-generating device;

[0053] Figure 4 for Figure 1 The matching structure diagram of the voice coil, connection structure and centering support of the middle sound device;

[0054] Figure 5 A cross-sectional view of a second embodiment of the sound-generating device provided by the present invention;

[0055] Figure 6 for Figure 5 A cross-sectional view of the sound-generating device from another perspective;

[0056] Figure 7 A cross-sectional view of a third embodiment of the sound-generating device provided by the present invention;

[0057] Figure 8 A cross-sectional view of a fourth embodiment of the sound-generating device provided by the present invention;

[0058] Fig. 9 An exploded view of an embodiment of a skeleton in a sound-generating device of the present invention;

[0059] Fig.10 It is a structural diagram of an embodiment of a centering support plate in a sound-generating device of the present invention;

[0060] Fig.11 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;

[0061] Fig.12 A static magnetostrictive force curve diagram of the vibration direction in an embodiment of the sound-generating device of the present invention;

[0062] Fig.13 A stiffness curve diagram of an embodiment of the sound-generating device of the present invention and a prior art design;

[0063] Fig.14 This is a test diagram of the frequency response performance of an embodiment of the sound-generating device of the present invention and a prior art design.

[0064] Description of Figure Numbers:

[0065] 100. Sound-generating device; 1. Shell; 2. Magnetic circuit system; 21. Central magnetic part; 211. Central magnet; 212. Central magnetic plate; 213. Recessed 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. Accommodating space; 24. Magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Inner ring hole; 32. Frame; 321. Main body structure; 3211. Recessed part; 3212. Hollow hole; 3213. Connecting frame; 322. Connecting structure; 3221. First connecting arm; 3222. Second connecting arm; 3223. Third connecting arm; 3 23. First magnetic attraction part; 3231. Magnetic conductive sheet; 3232. Magnetic material coating; 324. Dome top; 325. First component; 3251. First support member; 3252. First connecting member; 326. Second component; 3261. Second support member; 3262. Second connecting member; 33. Voice coil; 331. Lead part; 34. Centering support plate; 341. First connecting part; 342. Elastic part; 3421. First elastic arm; 3422. Second elastic arm; 3423. Third elastic arm; 343. Second connecting part; 4. Support member; 41. Second magnetic attraction part; 42. Front cover; 421. Sound hole; 43. Module shell; 431. Module upper shell; 432. Module lower shell; 433. Installation space; 5. Mesh cloth.

[0066] 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

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] See also Figures 1 to 4In 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 4; the magnetic circuit system 2 includes a central magnetic portion 21 and a side magnetic portion 22 arranged at intervals, and the central magnetic portion 21 and the side magnetic portion 22 are arranged at intervals to form a magnetic gap 24; the vibration system 3 is arranged on one side of the magnetic circuit system 2, and 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, and the other end of the voice coil 33 is connected to the skeleton 32. The centering support piece 34 is arranged corresponding to the magnetic gap 24, and is opposite to the diaphragm 31 and is arranged at an interval. One end of the centering support piece 34 is connected to the end of the skeleton 32 away from the diaphragm 31, and the other end of the centering support piece 34 is connected to the shell 1. The skeleton 32 is provided with at least two separately arranged connecting structures 322, and the connecting structure 322 is a metal part. The voice coil 33 is provided with two lead parts 331, and the centering support piece 34 is provided with two conductive parts. Each connecting structure 322 is electrically connected to the corresponding lead part 331 and the conductive part respectively; at least a part of the support member 4 is located on the side of the diaphragm 31 facing away from the magnetic circuit system 2.

[0072] Among them, the skeleton 32 is provided with a first magnetic attraction part 323, and the support part 4 is provided with a second magnetic attraction part 41. 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. When in a 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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 skeleton 32 and a centering support 34. 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. One end of the skeleton 32 is connected to the diaphragm 31, and the other end of the skeleton 32 is connected to the centering support 34. 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 skeleton 32 is connected to one end of the elastic portion 342 away from the first connecting portion 341. When the vibration system 3 vibrates, the centering support 34 can produce elastic deformation in the vibration direction along with the vibration of the diaphragm 31 and the voice coil 33.

[0078] Among them, the skeleton 32 includes at least two separately arranged connecting structures 322, one end of the connecting structure 322 is connected to the diaphragm 31, and can be directly connected to the diaphragm 31, or can be connected to the main body structure 321 of the skeleton 32 as in the following embodiment, and indirectly connected to the diaphragm 31 through the main body structure 321; the end of the connecting structure 322 away from the diaphragm 31 extends toward the centering support plate 34 and is connected to the centering support plate 34, and the end of the voice coil 33 facing the diaphragm 31 is connected to the part of the skeleton 32 connected to the diaphragm 31, for example, connected to two connecting structures 322. When the skeleton 32 includes a main body structure 321 stacked with the diaphragm 31, the voice coil 33 can also be connected to the main body structure 321; that is, the voice coil 33 is connected to the centering support plate 34 through the skeleton 32. In the embodiment of the present invention, each connection structure 322 is evenly distributed around the voice coil 33, so that the vibration system 3 is evenly stressed; for example, the skeleton 32 can be provided with two connection structures 322 respectively located on both sides of the voice coil 33, or one connection structure 322 can be respectively provided on the four sides of the skeleton 32. 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 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 and covers the inner ring hole 311; the provision of the skeleton 32 can be used to improve the structural strength of the middle area of ​​the diaphragm 31.

[0079] The centering support plate 34 can be an integral structure arranged around the circumference of the vibration system 3; or a plurality of centering support plates 34 can be arranged around the circumference of the voice coil 33. In this case, the centering support plates 34 can be connected to each other, or two adjacent centering support plates 34 can be arranged at intervals, for example, two centering support plates 34 can be arranged on opposite sides of the skeleton 32.

[0080] 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.

[0081] In the embodiment of the present invention, the connection structure 322 of the skeleton 32 is a metal part made of metal material; the voice coil 33 has two lead parts 331 extending outward from the voice coil body, and the two lead parts 331 correspond to two electrodes respectively; at least two independent conductive parts are arranged on the centering support plate 34, and the conductive part can be a welding pad arranged on the centering support plate 34, or at least two independent conductive parts can be arranged on the same centering support plate 34; when at least two centering support plates 34 are arranged, the conductive part can also be arranged on at least two of the centering support plates 34. The connection structure 322 is electrically connected to a corresponding lead portion 331 and a conductive portion respectively, so that the voice coil 33 is electrically connected to the centering support plate 34 through the skeleton 32. The lead portion 331 of the voice coil 33 does not need to extend outward, which facilitates the power connection of the voice coil 33. It can also avoid the problem that the lead portion 331 may interfere with other components due to the lead portion 331 being too long, ensuring that the vibration system 3 can move stably, improving performance stability, and reducing the risk of disconnection due to the lead portion 331 being too long. In addition, there is no need to extend the lead portion 331 directly to the position of the centering support plate 34, 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, which is beneficial to increase the volume of the magnet in the magnetic circuit system 2 in the vibration direction of the vibration system 3, improve the BL value of the product, and improve the acoustic performance of the product.

[0082] Optionally, the connection between the lead portion 331 and the connection structure 322 can be made by bonding with conductive adhesive or by welding. The centering support piece 34 can be made of metal or other conductive materials to make it conductive; the centering support piece 34 can also be made of plastic or other insulating materials, and the centering support piece 34 can be conductive by providing a conductive line on the centering support piece 34. The centering support piece 34 and the connection structure 322 can also be connected by bonding with conductive adhesive or welding. 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.

[0083] 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.

[0084] In the embodiment of the present invention, a first magnetic attraction portion 323 is provided on the skeleton 32 of the vibration system 3. One, two or more first magnetic attraction portions 323 may be provided. The first magnetic attraction portion 323 may be provided on the surface of the skeleton 32, embedded in the skeleton 32, or connected to the edge of the first magnetic attraction portion 323. At least part of the skeleton 32 may be made of a magnetic conductive material to serve as the first magnetic attraction portion 323. 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, and a second magnetic attraction portion 41 is provided on the support member 4. 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 module upper shell 431 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 arranged on the surface of the support member 4, or may be embedded inside the support member 4, or the support member 4 itself may form the second magnetic attraction portion 41.

[0085] 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 combined force of the first attraction force and the second attraction force. The first magnetic attraction part 323 can be set as a magnetic conductive structure that can be attracted by a magnet, such as a magnetic conductive sheet 3231, a magnetic material coating 3232, etc., and the second magnetic attraction part 41 can be set as a magnet; both can make the first magnetic attraction part 323 subject to the attraction force of the second magnetic attraction part 41 and the magnetic circuit system 2, and the total attraction force to the first magnetic attraction part 323 can be used as a force applied to the vibration system 3. In addition, in this embodiment, in the vibration direction of the vibration system 3, the first magnetic attraction part 323 and the second magnetic attraction part 41 are arranged relative to each other, so that the first magnetic attraction part 323 is better within the magnetic field range of the second magnetic attraction part 41, thereby increasing the first attraction force between the first magnetic attraction part 323 and the second magnetic attraction part 41.

[0086] 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 .

[0087] 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 diaphragm 31 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.

[0088] 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.12 shown.

[0089] 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.13 and Fig.14 shown.

[0090] 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.

[0091] That is, according to the technical solution of the present invention, a first magnetic attraction portion 323 is arranged on the vibration system 3 of the sound-generating device 100, and a support member 4 is arranged on the side of the vibration system 3 facing away from the magnetic circuit system 2, and a second magnetic attraction portion 41 is arranged on the support member 4, so that a first attraction force exists between the first magnetic attraction portion 323 and the second magnetic attraction portion 41, and a second attraction force exists between the first magnetic attraction portion 323 and the magnetic circuit system 2. In this way, the first magnetic attraction portion 323 interacts with the second magnetic attraction portion 41 of the support member 4 and the magnetic circuit system 2 respectively, and a static magnetic force is introduced into the vibration system 3, so that when the vibration system 3 is working, part of the strain recovery force of the vibration system 3 can be offset by the combined force of the first attraction force and the second attraction force, and the stiffness of the vibration system 3 can be reduced by the static magnetic force, so that the compliance of the vibration system 3 is better, thereby increasing the amplitude of the vibration system 3, so as to greatly improve the low-frequency effect of the sound-generating device 100.

[0092] 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. At the same time, the lead portion 331 of the voice coil 33 is electrically connected to the conductive portion of the centering support plate 34 through the connecting structure 322 of the skeleton 32. Under the premise that the centering support plate 34 is not directly connected to the voice coil 33, the electrical connection between the lead portion 331 and the centering support plate 34 can be achieved through the skeleton 32. There is no need to extend the lead portion 331 of the voice coil 33 outward, and the extension length of the lead portion 331 is shortened, which is convenient for connecting the voice coil 33 to electricity and can also prevent the lead portion 331 from being broken due to being too long. There is no need to extend the lead portion 331 directly to the position of the centering support plate 34, and the magnetic circuit system 2 does not need to avoid the lead portion 331, so that the magnet setting volume in the magnetic circuit system 2 can be increased in the vibration direction of the vibration system 3, the product BL value is improved, and the acoustic performance of the sound-generating device 100 is improved.

[0093] Combined with reference Figure 1 and Figure 4 In one embodiment, the connecting structure 322 includes a first connecting arm 3221 and a second connecting arm 3222. The first connecting arm 3221 is extended along a portion of the circumference of the voice coil 33. One end of the voice coil 33 is connected to the first connecting arm 3221, one end of the second connecting arm 3222 is connected to the first connecting arm 3221, and the other end of the second connecting arm 3222 is bent and extended in a direction away from the diaphragm 31 to be connected to the centering support plate 34.

[0094] In this embodiment, the connection structure 322 includes a first connection arm 3221 and a second connection arm 3222 connected to each other. The first connection arm 3221 extends along a portion of the circumference of the voice coil 33. The first connection arm 3221 can be directly connected to the diaphragm 31. When the skeleton 32 includes a body structure 321, the first connection arm 3221 can be connected to the surface of the body structure 321 or to the side of the body structure 321, which is not limited here. The end surface of the voice coil 33 close to the diaphragm 31 is connected to the first connection arm 3221 of each connection structure 322. One end of the second connecting arm 3222 can be connected between the two ends of the first connecting arm 3221, can be connected to the central area of ​​the first connecting arm 3221, or can be adjacent to one end of the first connecting portion 341; the second connecting arm 3222 extends toward the centering support plate 34 away from the end of the first connecting arm 3221 and is connected to the centering support plate 34; the second connecting arm 3222 can be directly connected to the centering support plate 34. In one embodiment, the connecting structure 322 can also include a third connecting arm 3223, which is connected to the end of the second connecting arm 3222 away from the first connecting arm 3221, and is bent relative to the second connecting arm 3222 toward the side away from the voice coil 33, so that the third connecting arm 3223 is connected to the centering support plate 34, which can increase the connection area between the connecting structure 322 and the centering support plate 34, thereby improving the connection strength and convenience between the connecting structure 322 and the centering support plate 34.

[0095] Among them, the second connecting arm 3222 can be set as a straight extension structure, so that one end of the second connecting arm 3222 is connected to the main body structure 321, and the other end extends toward the centering support plate 34 in the direction away from the diaphragm 31; the second connecting arm 3222 can also be set as a bending 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 first connecting arm 3221, and the second section extends from the first section in the direction away from the diaphragm 31 and is connected to the centering support plate 34.

[0096] Combined with reference Figures 1 to 4 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.

[0097] 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.

[0098] See also Figures 1 to 3 In one embodiment, the skeleton 32 further includes a main body structure 321 , the main body structure 321 and the diaphragm 31 are stacked, one end of the connecting structure 322 is connected to the main body structure 321 , and the first magnetic attraction portion 323 is disposed on the main body structure 321 .

[0099] In this embodiment, the main body structure 321 and the diaphragm 31 are stacked, and each connection structure 322 is connected to the main body structure 321; the arrangement of the main body structure 321 can improve the structural strength of the middle area of ​​the diaphragm 31. The first magnetic attraction portion 323 is arranged on the main body structure 321, so that the static magnetic force of 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 the polarization problem is avoided.

[0100] Each connection structure 322 may be connected to the edge of the same main body structure 321 ; or at least two main body structures 321 may be provided so that each connection structure 322 is connected to one main body structure 321 .

[0101] It should be noted that when the main body structure 321 is made of metal or other conductive materials, if the two connection structures 322 respectively connected to the two lead parts 331 are connected to the same main body structure 321, it is necessary to set an insulating material between the connection structure 322 and the main body structure 321, for example, the connection structure 322 and the main body structure 321 are bonded by insulating glue; in some embodiments, when the two connection structures 322 are respectively connected to the two main body structures 321, an insulating structure can be set between the two main body structures 321, for example, the two main body structures 321 are connected by insulating glue. This avoids the problem of short circuit caused by the electrical connection of the two connection structures 322 through the main body structure 321.

[0102] See also Figure 3 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 .

[0103] 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 324 provided on the recessed portion 3211, which will not be described in detail here.

[0104] See also Figures 1 to 3 In one embodiment, the main body structure 321 is provided with a hollow hole 3212 , the skeleton 32 further includes a ball top 324 , the ball top 324 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 324 .

[0105] In this embodiment, the main body structure 321 is provided with a hollow hole 3212, and a ball top 324 is provided in the skeleton 32 to cover the hollow hole 3212. The ball top 324 and the main body structure 321 can be connected by bonding or other methods, so that the ball top 324 and the main body structure 321 are sealed and connected to avoid leakage at the position of the hollow hole 3212. The ball top 324 can be a planar structure, or the ball top 324 can have a convex arc surface. The first magnetic attraction part 323 is provided on the ball top 324, and the first magnetic attraction part 323 can be provided on the surface of the ball top 324 facing the second magnetic attraction part 41, or on the surface of the ball top 324 facing the magnetic circuit system 2, or embedded inside the ball top 324; in addition, the ball top 324 can also be made of a magnetic conductive material, so that the ball top 324 serves as the first magnetic attraction part 323.

[0106] In this embodiment, by setting a split ball top 324 and a main body structure 321, when the ball top 324 is made of a magnetic conductive material as the first magnetic attraction part 323 or the first magnetic attraction part 323 is formed by setting a magnetic material coating 3232 on the ball top 324, it is convenient to control the volume and setting area of ​​the first magnetic attraction part 323, so as to control the magnitude of 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.

[0107] 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 .

[0108] 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.

[0109] See also Figure 8 In one embodiment, the skeleton 32 includes a first component part 325 and a second component part 326 which are separately arranged and both are made of metal materials. The first magnetic attraction part 323 is connected to at least one of the first component part 325 and the second component part 326. Along the vibration direction of the vibration system 3, the projection of the voice coil 33 is located inside the first component part 325 and the second component part 326. At least part of the first component part 325 forms one of the connection structures 322, and at least part of the second component part 326 forms another connection structure 322.

[0110] In this embodiment, the frame 32 includes a first component 325 and a second component 326 which are separately arranged. The first component 325 and the second component 326 are both made of metal materials, and at least part of the first component 325 forms a connection structure 322, and at least part of the second component 326 forms another connection structure 322; the two lead parts 331 of the voice coil 33 are respectively connected to the first component 325 and the second component 326. Part of the first component 325 is stacked with the diaphragm 31, and part of the second component 326 is stacked with the diaphragm 31, wherein the first component 325 and the second component 326 can be arranged at intervals or connected to each other; when the first component 325 and the second component 326 are connected to each other, the first component 325 and the second component 326 can be connected to each other by insulating glue, or the first component 325 and the second component 326 can be connected to the insulating part respectively, so as to avoid the problem of short circuit caused by the electrical connection between the first component 325 and the second component 326.

[0111] In this embodiment, along the vibration direction of the vibration system 3, the projection of the voice coil 33 on the skeleton 32 is located on the first component 325 and the second component 326, so that the magnetic field force on the voice coil 33 can act on the first component 325 and the second component 326 at the same time, so that the diaphragm 31 and the skeleton 32 are evenly stressed; the end of the voice coil 33 close to the diaphragm 31 can be connected only to the first component 325 or the second component 326, so as to improve the convenience of connecting the voice coil 33 and the skeleton 32; or the end of the voice coil 33 close to the diaphragm 31 can be connected to the first component 325 and the second component 326 respectively, so as to improve the connection strength between the voice coil 33 and the skeleton 32. Optionally, the first magnetic attraction part 323 can be connected to the first component 325 and the second component 326, or the first magnetic attraction part 323 can be connected only to the first component 325 or the second component 326.

[0112] See also Fig. 9 In one embodiment, the first component 325 includes a first support member 3251 and a first connecting member 3252, and the second component 326 includes a second support member 3261 and a second connecting member 3262, wherein the first support member 3251 is insulated and connected to the second support member 3261 and are respectively arranged opposite to the central magnetic portion 21, and the first connecting member 3252 and the second connecting member 3262 are both bent and extended in a direction away from the diaphragm 31 and are respectively connected to the corresponding conductive portions.

[0113] In this embodiment, the first support member 3251 of the first component 325 and the second support member 3261 of the second component 326 are connected to each other through insulating glue and cover the middle area of ​​the diaphragm 31, which can improve the structural strength of the middle area of ​​the diaphragm 31; the first magnetic attraction portion 323 covers part of the first support member 3251 and part of the second support member 3261. The first component 325 is provided with a first connecting member 3252 extending from the first supporting member 3251 to the centering support piece 34, and one end of the first connecting member 3252 away from the first supporting member 3251 is connected to the centering support piece 34; the second component 326 is provided with a second connecting member 3262 extending from the second supporting member 3261 to the centering support piece 34, and one end of the second connecting member 3262 away from the second supporting member 3261 is connected to the centering support piece 34.

[0114] Optionally, the first connecting member 3252 can be integrally formed with the first supporting member 3251 to form the first component 325, and the first connecting member 3252 and the first supporting member 3251 can also be mutually connected split structures. Similarly, the second connecting member 3262 can be integrally formed with the second supporting member 3261 to form the second component 326, and the second connecting member 3262 and the second supporting member 3261 can also be mutually connected split structures.

[0115] Optionally, a hollow hole 3212 may be opened at the connection position between the first support member 3251 and the second support member 3261 , and the hollow hole 3212 may be covered by providing a ball top portion 324 or utilizing the first magnetic attraction portion 323 .

[0116] Combined with reference Figure 1 and Fig.11 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.

[0117] 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.

[0118] Along the vibration direction of the vibration system 3, the centering support piece 34 is located on the side of the side magnetic conductive plate 222 facing away from the diaphragm 31, and the outer edge of the side magnetic conductive 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 conductive plate 222 can be connected to the shell 1, and the other part of the outer edge of the side magnetic conductive 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 conductive plate 222; the connecting 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.

[0119] See also Fig.11 In one embodiment, the side magnetic conductive plate 222 is integrally provided with the housing 1 .

[0120] 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.

[0121] 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.

[0122] See also Fig.11 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.

[0123] 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.

[0124] See also Figure 1 and Fig.10 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.

[0125] 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.

[0126] 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.

[0127] See also Figure 4In one embodiment, there are two centering support plates 34, and the two centering support plates 34 are arranged on opposite sides of the frame 32; one of the centering support plates 34 is provided with two conductive parts; or, each centering support plate 34 is provided with a conductive part.

[0128] In this embodiment, two centering supports 34 are provided in the vibration system 3, and the two centering supports 34 are respectively provided on opposite sides of the frame 32, so that support force can be provided for the frame 32 on opposite sides of the frame 32, so that the vibration system 3 is subjected to force evenly and maintains position balance, avoiding polarization problems. The two centering supports 34 can be connected end to end to form a ring structure, or the two centering supports 34 can be spaced apart from each other. The voice coil 33 is usually provided with two lead parts 331 corresponding to the two electrodes respectively; in the present embodiment, conductive parts can be provided on the two centering supports 34 respectively, and the two connecting structures 322 electrically connected to the two lead parts 331 of the voice coil 33 are electrically connected to the two conductive parts one by one respectively; 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 formed on different surfaces of the insulating body respectively or arranged at intervals on the same surface of the insulating body, and similarly, the two connecting structures 322 electrically connected to the two lead parts 331 are electrically connected to the two conductive parts one by one respectively; in this way, the voice coil 33 can be electrically connected to the centering support 34 through the connecting structure 322, and the problem of short circuit caused by the electrical connection of the two conductive parts can be avoided.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] See also Figures 1 to 3 In 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] See also Figures 1 to 3 In one embodiment, the first magnetic attraction portion 323 is a magnetic conductive sheet 3231, and the material of the magnetic conductive sheet 3231 is SPCC or SUS.

[0137] In this embodiment, each of the separate connection structures 322 may be connected to the first magnetic attraction portion 323 provided as a magnetic conductive sheet 3231; when the skeleton 32 is provided with a main body structure 321, the magnetic conductive sheet 3231 may be pasted on the surface of the main body structure 321; or, when the skeleton 32 is provided with a first component 325 and a second component 326 for forming at least two connection structures 322, the first magnetic attraction portion 323 provided as a magnetic conductive sheet 3231 may be pasted on the surface of at least one of the first component 325 and the second component 326. In some embodiments, when the skeleton 32 is provided with a hollow hole 3212 and a ball top portion 324 covering the hollow hole 3212, the first magnetic attraction portion 323 provided as a magnetic conductive sheet 3231 may be pasted on the surface of the ball top portion 324, or the ball top portion 324 may be provided with a magnetic conductive sheet 3231 as the first magnetic attraction portion 323, which is not limited here.

[0138] See also Figure 8In one embodiment, the first magnetic attraction portion 323 is formed as a magnetic material coating 3232 disposed on the surface of the skeleton 32; wherein the magnetic material coating 3232 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 magnetic material coating 3232 can be applied to the surface of the skeleton 32 facing the second magnetic attraction portion 41, or to the surface of the skeleton 32 facing away from the second magnetic attraction portion 41, or to the surface of the skeleton 32 facing the second magnetic attraction portion 41 and the surface facing away from the second magnetic attraction portion 41, which are not limited here. Similarly, when the skeleton 32 is provided with a main body structure 321, the magnetic material coating 3232 may be provided on the surface of the main body structure 321; or, when the skeleton 32 is provided with a first component 325 and a second component 326 for forming at least two connection structures 322, the magnetic material coating 3232 may be provided on the surface of at least one of the first component 325 and the second component 326. In some embodiments, when the skeleton 32 is provided with a hollow hole 3212 and a ball top portion 324 covering the hollow hole 3212, the magnetic material coating 3232 may be provided on the surface of the ball top portion 324, which is not limited here.

[0139] See also Figure 7 In one embodiment, part of the skeleton 32 is made of a magnetic conductive material to form a first magnetic attraction portion 323; in this embodiment, the entire skeleton 32 can be made of a magnetic conductive material, or part or the entire body 231 of the skeleton 32 can be made of a magnetic conductive material; when the skeleton 32 is provided with a ball top 324, only the ball top 324 can be set as a magnetic conductive material, or the ball top 324 and at least part of the body structure 321 can be set as a magnetic conductive material. This setting means that the first magnetic attraction portion 323 is formed during the preparation of the skeleton 32, and there is no need to assemble the first magnetic attraction portion 323 additionally, thereby improving the convenience of assembly.

[0140] In one embodiment, the first magnetic portion 323 is embedded in the frame 32 .

[0141] In this embodiment, when the skeleton 32 is provided with a main body structure 321, an installation cavity may be provided inside the main body structure 321, and the first magnetic attraction portion 323 may be provided inside the installation cavity; or the first magnetic attraction portion 323 may be provided in a mold for forming the main body structure 321 when the main body structure 321 is formed by injection molding, so that the first magnetic attraction portion 323 is naturally embedded inside the main body structure 321 after the main body structure 321 is formed. When the skeleton 32 is provided with a first component 325 and a second component 326 that are separated, the first magnetic attraction portion 323 may be embedded inside one of the first component 325 and the second component 326, or at least one first magnetic attraction portion 323 may be embedded inside both the first component 325 and the second component 326. Such a configuration can prevent the first magnetic attraction portion 323 from being exposed to the outside, can protect the first magnetic attraction portion 323, and reduce the risk of damage to the first magnetic attraction portion 323.

[0142] See also Figure 1 and Figure 2 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 .

[0143] In this embodiment, the first magnetic attraction portion 323 can be arranged on the surface of the skeleton 32 facing the second magnetic attraction portion 41, or the first magnetic attraction portion 323 can be arranged on the surface of the skeleton 32 facing the magnetic circuit system 2; or the first magnetic attraction portion 323 can be arranged on both the surface of the skeleton 32 facing the second magnetic attraction portion 41 and the surface of the skeleton 32 facing the magnetic circuit system 2, which is not limited here. The way of arranging the first magnetic attraction portion 323 on the surface of the skeleton 32 makes it easier to connect the first magnetic attraction portion 323 and the skeleton 32, and facilitates disassembly and assembly.

[0144] In some embodiments, the first magnetic attraction portion 323 may be disposed on any surface of the skeleton 32 and on the inner side of the skeleton 32 .

[0145] In one embodiment, the second magnetic attraction portion 41 is a magnet, and 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 the magnetization direction 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 then improving the sound sensitivity of the sound-generating device 100.

[0146] See also Figure 1 and Figure 2In 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.

[0147] 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.

[0148] 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.

[0149] 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 .

[0150] 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.

[0151] 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.

[0152] 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.

[0153] See also Figure 1 and Figure 2 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.

[0154] 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.

[0155] See also Figure 1 and Figure 2 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 .

[0156] 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 selected as a sound-generating unit used as 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 make sounds 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] The present invention further provides an electronic device, which includes a sound-generating device 100 as in any of the above embodiments. The specific structure of the sound-generating device 100 refers to the above embodiments. Since the electronic device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0163] 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.

[0164] 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 plate, the outer edge of the diaphragm is connected to the shell, 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 plate is opposite to the diaphragm and arranged at intervals, one end of the centering support plate is connected to an end of the skeleton away from the diaphragm, and the other end of the centering support plate is connected to the shell, the skeleton is provided with at least two separately provided connection structures, the connection structure is a metal part, the voice coil is provided with two lead parts, the centering support plate is provided with two conductive parts, and each of the connection structures is electrically connected to the corresponding lead part and conductive part respectively; and A support member, at least a portion of which is located on a side of the diaphragm facing away from the magnetic circuit system; In which, the skeleton is provided with a first magnetic attraction part, the support part is provided with a second magnetic attraction part, 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 connecting structure comprises a first connecting arm and a second connecting arm, wherein the first connecting arm is arranged to extend along a part of the circumference of the voice coil, one end of the voice coil is connected to the first connecting arm, one end of the second connecting arm is connected to the first connecting arm, and the other end of the second connecting arm is bent and extended in a direction away from the diaphragm to be connected to the centering support plate; And / or, the sound-generating device has two short sides arranged opposite to each other and two long sides arranged opposite to each other, and the frame includes two connecting structures, and the two connecting structures are respectively arranged on the two short sides or the two long sides.

3. The sound generating device according to claim 1, characterized in that: The skeleton further comprises a main body structure, the main body structure and the diaphragm are stacked, one end of the connecting structure is connected to the main body structure, and the first magnetic attraction portion is arranged on the main body structure; And / or, the main body structure is provided with a hollow hole, the skeleton further comprises 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 the 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.

4. The sound generating device according to claim 1, characterized in that: The skeleton includes a first component and a second component which are separately arranged and both are made of metal materials. The first magnetic attraction part is connected to at least one of the first component and the second component. Along the vibration direction of the vibration system, the projection of the voice coil is located within the first component and the second component. At least part of the first component forms one of the connection structures, and at least part of the second component forms another of the connection structures.

5. The sound generating device according to claim 4, characterized in that: The first component includes a first supporting member and a first connecting member, and the second component includes a second supporting member and a second connecting member, wherein the first supporting member is insulated and connected to the second supporting member and are respectively arranged opposite to the central magnetic part, and the first connecting member and the second connecting member are both bent and extended in a direction away from the diaphragm and are respectively connected to the corresponding conductive parts.

6. The sound generating device according to claim 1, 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.

7. The sound generating device according to claim 6, 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.

8. The sound generating device according to claim 1, characterized in that: An accommodating 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 that are 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 accommodating space. The skeleton is connected to the second connecting portion.

9. The sound generating device according to claim 1, characterized in that: There are two centering support plates, which are arranged on opposite sides of the frame; One of the centering support plates is provided with two of the conductive parts; or each of the centering support plates is provided with one of the conductive parts.

10. 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.

11. The sound generating device according to claim 1, characterized in that: The first magnetic attraction portion is a magnetic conductive sheet, and the material of the magnetic conductive sheet is SPCC or SUS430; And / or, the first magnetic attraction portion is formed as a magnetic material coating provided on the surface of the skeleton; And / or, at least a portion of the skeleton is made of a magnetic conductive material to form the first magnetic attraction portion; And / or, the first magnetic attraction portion is embedded in the frame; And / or, the first magnetic attraction portion is provided 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.

12. The sound generating device according to claim 1, characterized in that: The second magnetic attraction part is a magnet, the second attraction force exists between the first magnetic attraction part and the central magnetic part, and the magnetization direction of the second magnetic attraction part is opposite to the magnetization direction of the central magnetic part; 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.

13. The sound generating device according to any one of claims 1 to 12, 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.

14. The sound generating device according to any one of claims 1 to 12, 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.

15. An electronic device, characterized in that: The electronic device comprises the sound generating device as claimed in any one of claims 1 to 14.

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