Sound-producing device and electronic apparatus

Abstract

Disclosed in the present invention are a sound-producing device and an electronic apparatus. The sound-producing device comprises a magnetic circuit system, a vibration system and a support member, wherein the magnetic circuit system comprises a magnetically conductive yoke, and a central magnetic portion and a side magnetic portion that are arranged on the magnetically conductive yoke, the central magnetic portion and the side magnetic portion being spaced apart from each other to form a magnetic gap; the vibration system is arranged on one side of the magnetic circuit system, and comprises a diaphragm assembly and a voice coil; one end of the voice coil is connected to the diaphragm assembly; the end of the voice coil that is away from the diaphragm assembly is arranged corresponding to the magnetic gap; at least a part of the support member is located on the side of the diaphragm assembly facing back to the magnetic circuit system; the diaphragm assembly is provided with a first magnetic attraction portion, and the support member is provided with a second magnetic attraction portion; and there is a first magnetic attraction force between the first magnetic attraction portion and the second magnetic attraction portion, and there is a second magnetic attraction force between the first magnetic attraction portion and the magnetic circuit system. In the present invention, by means of providing the first magnetic attraction portion and the second magnetic attraction portion, a static magnetic force is introduced into the vibration system to reduce the stiffness of the vibration system, thereby significantly improving a low-frequency effect of the sound-producing device.

Description

Sound-generating devices and electronic equipment Technical Field

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

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

[0003] Sound-generating devices are important electroacoustic transducers in consumer electronics, widely used in applications such as speakers, receivers, and headphones. As electronic product performance improves, improvements in the acoustic performance of sound-generating devices are inevitable. Loudness (sensitivity) is a key performance indicator for sound-generating devices. In theory, the low-frequency loudness of a sound-generating device is closely related to the maximum amount of air its diaphragm assembly can displace.

[0004] In related technologies, with the increasing demand for thinner and lighter electronic devices, the space available for miniature sound generators is shrinking. To meet acoustic performance requirements, a larger vibration space is required to accommodate large amplitudes. However, the driving force factor (BL) of the product decreases as the displacement of the vibration system increases, limiting product performance and preventing significant improvement in low-frequency effects.

[0005] Utility Model Content

[0006] The main purpose of the present utility model is to provide 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 the static magnetic force, thereby greatly improving the low-frequency effect of the sound-generating device.

[0007] To achieve the above-mentioned purpose, the present invention provides a sound-generating device, which includes:

[0008] A magnetic circuit system comprising a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, wherein the central magnetic portion and the side magnetic portion are spaced apart to form a magnetic gap;

[0009] a vibration system, the vibration system being disposed on one side of the magnetic circuit system, the vibration system comprising a diaphragm assembly and a voice coil, one end of the voice coil being connected to the diaphragm assembly, and an end of the voice coil being away from the diaphragm assembly being disposed corresponding to the magnetic gap; and

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

[0011] In which, the diaphragm assembly is provided with a first magnetic attraction part, the support member 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, and there is a second attraction force between the first magnetic attraction part and the magnetic circuit system. When 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 sound-emitting device further includes a front cover, which is arranged on the side of the diaphragm assembly facing away from the magnetic circuit system and forms the support member, the periphery of the front cover is connected to the periphery of the diaphragm assembly to form a vibration space between the front cover and the diaphragm assembly, and the second magnetic attraction portion is arranged on the front cover.

[0013] In one embodiment, the sound-emitting device further includes a module upper shell and a module lower shell connected to 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 diaphragm assembly facing away from the magnetic circuit system, the module upper shell is formed as the support member, and the second magnetic attraction part is arranged on the module upper shell.

[0014] In one embodiment, the diaphragm assembly includes a diaphragm and a vibration plate disposed on the diaphragm, and the first magnetic attraction portion is disposed on the vibration plate.

[0015] In one embodiment, the first magnetic portion is bonded to the vibration plate; or the first magnetic portion and the vibration plate are integrally injection-molded;

[0016] And / or, the first magnetic attraction portion is provided on a side of the vibration plate facing the support member;

[0017] And / or, the first magnetic attraction portion is provided on a side of the vibration plate facing the central magnetic portion;

[0018] And / or, a fixed cavity is provided in the vibration plate, and the first magnetic attraction part is provided in the fixed cavity.

[0019] In one embodiment, the first magnetic attraction portion includes a plurality of portions; the plurality of first magnetic attraction portions are disposed on the same side or different sides of the vibration plate; and / or the plurality of first magnetic attraction portions are spliced ​​or spaced apart;

[0020] And / or, the first magnetic attraction portion is circular, elliptical or polygonal;

[0021] And / or, the central axis of the first magnetic attraction portion coincides with the central axis of the sound-generating device;

[0022] And / or, the first magnetic attraction portion is a magnetic conductive plate, and the material of the magnetic conductive plate is SPCC or SUS430;

[0023] And / or, the vibration plate is made of a magnetic conductive sheet to form the first magnetic attraction portion.

[0024] In one embodiment, the first magnetic attraction portion is a magnetic material coating provided on the vibration plate.

[0025] In one embodiment, the magnetic material coating includes a coating layer and magnetic powder, wherein the magnetic powder is doped or mixed in the coating layer; the magnetic powder is 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 sendust powder;

[0026] And / or, the magnetic material coating is provided on a side of the vibration plate facing the support member;

[0027] And / or, the magnetic material coating is provided on a side of the vibration plate facing the central magnetic portion.

[0028] In one embodiment, the magnetic material coating comprises a plurality of coatings; the plurality of coatings are arranged on the same side or different sides of the vibration plate; and / or the plurality of coatings are arranged in a spliced ​​manner or in an interval manner;

[0029] And / or, the magnetic material coating is circular, elliptical or polygonal;

[0030] And / or, the central axis of the magnetic material coating coincides with the central axis of the sound-generating device;

[0031] And / or, the vibration plate has a first surface and a second surface arranged opposite to each other and a peripheral side surface connecting the first surface and the second surface; the magnetic material coating covers at least a portion of the first surface; and / or, the magnetic material coating covers at least a portion of the second surface; and / or, the magnetic material coating covers the first surface and the peripheral side surface; and / or, the magnetic material coating covers the second surface and the peripheral side surface.

[0032] In one embodiment, the central magnetic portion includes a stacked central magnet and a central magnetic conductive plate, the central magnet is connected to the magnetic conductive yoke, and the central magnetic conductive plate has a recessed area corresponding to the first magnetic attraction portion;

[0033] Part of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly to form the recessed area; or the recessed area is a through-hole structure penetrating the central magnetic conductive plate.

[0034] In one embodiment, the diaphragm is provided with an inner ring hole, the vibration plate cover is provided on the inner ring hole, the vibration plate is provided with a recessed portion, the recessed portion is formed by the side of the vibration plate facing away from the central magnetic portion toward the central magnetic portion, and the first magnetic attraction portion is provided in the recessed portion.

[0035] In one embodiment, the recessed area is a through hole, and the central magnet is provided with a protrusion corresponding to the through hole. The protrusion is located in the through hole, and the end surface of the protrusion facing the diaphragm does not exceed the end surface of the central magnetic conductive plate facing the diaphragm.

[0036] In one embodiment, the second magnetic portion is bonded to the support member; or the second magnetic portion and the support member are integrally injection molded;

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

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

[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] In one embodiment, the second magnetic attraction portion includes a plurality of portions; the plurality of second magnetic attraction portions are disposed on the same side or different sides of the support member; and / or the plurality of second magnetic attraction portions are spliced ​​or spaced apart;

[0041] And / or, the second magnetic attraction portion is circular, elliptical or polygonal;

[0042] And / or, 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;

[0043] And / or, the central axis of the second magnetic attraction portion coincides with the central axis of the sound-generating device;

[0044] And / or, the second magnetic attraction portion is arranged to face the first magnetic attraction portion;

[0045] And / or, a mounting groove is provided on a side of the support member facing the diaphragm assembly, and the second magnetic attraction portion is provided in the mounting groove.

[0046] The present utility model also provides an electronic device, which includes the above-mentioned sound-generating device.

[0047] The sound-generating device of the technical solution of the present invention is provided with a support member so that at least a part of the support member is located on the side of the diaphragm assembly facing away from the magnetic circuit system, and a first magnetic attraction portion is provided on the diaphragm assembly, and a second magnetic attraction portion is provided on the support member, so that there is a first attraction force between the first magnetic attraction portion and the second magnetic attraction portion, and a second attraction force between the first magnetic attraction portion and the magnetic circuit system. In this way, the first magnetic attraction portion is utilized to interact with the second magnetic attraction portion of the support member and the magnetic circuit system respectively, that is, static magnetic force is introduced into the vibration system, thereby effectively reducing the strain recovery force of the diaphragm assembly during movement, and reducing the stiffness of the vibration system through static magnetic force, so that the compliance of the diaphragm assembly is better, thereby greatly improving the low-frequency effect of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0049] FIG1 is a schematic structural diagram of a sound-generating device in a first embodiment of the present invention;

[0050] FIG2 is a schematic structural diagram of the sound-generating device in the first embodiment of the present invention from another perspective;

[0051] FIG3 is an exploded schematic diagram of the sound-generating device in the first embodiment of the present invention;

[0052] FIG4 is a cross-sectional schematic diagram of the sound-generating device in the first embodiment of the present invention;

[0053] FIG5 is a cross-sectional view of a sound-generating device in a second embodiment of the present invention;

[0054] FIG6 is a schematic structural diagram of a sound-generating device in a third embodiment of the present invention;

[0055] FIG7 is a schematic structural diagram of the sound-generating device in the third embodiment of the present invention from another perspective;

[0056] FIG8 is an exploded schematic diagram of a sound-generating device in a third embodiment of the present invention;

[0057] FIG9 is a cross-sectional view of a sound-generating device in a third embodiment of the present invention;

[0058] FIG10 is a cross-sectional view of a sound-generating device in a fourth embodiment of the present invention;

[0059] FIG11 is a partial cross-sectional diagram of a sound-generating device according to an embodiment of the present invention;

[0060] FIG12 is a partial cross-sectional schematic diagram of a sound-generating device in another embodiment of the present invention;

[0061] FIG13 is a partial cross-sectional diagram of a sound-generating device in another embodiment of the present invention;

[0062] FIG14 is a cross-sectional view of the connection between the vibration plate and the first magnetic attraction portion in the first embodiment of the present invention;

[0063] FIG15 is a cross-sectional view of the connection between the vibration plate and the first magnetic attraction portion in the second embodiment of the present invention;

[0064] FIG16 is a cross-sectional view of the connection between the vibration plate and the first magnetic attraction portion in the third embodiment of the present invention;

[0065] FIG17 is a cross-sectional view of the connection between the vibration plate and the first magnetic attraction portion in the fourth embodiment of the present invention;

[0066] FIG18 is a schematic cross-sectional view of a magnetic material coating in one embodiment of the present invention;

[0067] FIG19 is a schematic structural diagram of a vibration plate in one embodiment of the present invention;

[0068] FIG20 is a schematic structural diagram of a vibration plate at another time in one embodiment of the present invention;

[0069] FIG21 is a static magnetostrictive force curve diagram of the vibration direction of the sound-generating device in one embodiment of the present invention;

[0070] FIG22 is a stiffness curve diagram of the sound-generating device of the present invention and a conventional design;

[0071] FIG23 is a frequency response performance test diagram of the sound-generating device of the present invention and the existing design.

[0072] Description of Figure Numbers:

[0073] 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

[0074] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0075] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0076] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0077] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually 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 this utility model.

[0078] The present invention provides a sound-generating device 100. It is understandable that the sound-generating device 100 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, speakers, computers, headphones or televisions, etc., which are not limited here.

[0079] It should be noted that loudness (sensitivity) is the main indicator of the sound device 100. In theory, the low-frequency loudness of the sound device 100 is closely related to the maximum amount of air that its diaphragm assembly 31 can push. However, the volume of the sound device 100 in smart devices is getting smaller and smaller, making the effective vibration area (Sd) and the back cavity volume of the sound device 100 smaller and smaller. Therefore, a larger vibration space needs to be reserved to meet the large amplitude (X max However, the driving force factor BL value of the product will decrease as the displacement of the vibration system 3 increases. This results in that although a large vibration space is reserved, at actual low frequencies, even if the PA outputs the driving signal at full amplitude, the displacement of the vibration system 3 still cannot reach X. max , which greatly limits the performance of the product.

[0080] Considering that Sd is limited within given physical space constraints, and the extent to which BL can be increased is also limited within certain physical space and manufacturing constraints, the present invention adjusts the system stiffness (Kms) of the sound-generating device 100 to achieve a significant boost in low frequencies. In this invention, a novel magnetic circuit design introduces a static magnetoelectric force into the vibration system 3, which reduces the stiffness of the vibration system 3, thereby significantly boosting low frequencies.

[0081] 1 to 20 , in an embodiment of the present invention, the sound-generating device 100 includes a magnetic circuit system 2, a vibration system 3, and a support member 4. The magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and an edge magnetic portion 23 provided on the magnetic yoke 21. The central magnetic portion 22 and the edge magnetic portion 23 are spaced apart to form a magnetic gap 24. The vibration system 3 is provided on one side of the magnetic circuit system 2. The vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. One end of the voice coil 32 is connected to the diaphragm assembly 31, and the voice coil 32 is away from the diaphragm assembly 31. 1 is arranged corresponding to the magnetic gap 24, and at least a portion of the support member 4 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2; wherein, the diaphragm assembly 31 is provided with a first magnetic attraction portion 34, and the support member 4 is provided with a second magnetic attraction portion 41, a first attraction force is exerted between the first magnetic attraction portion 34 and the second magnetic attraction portion 41, and a second attraction force is exerted between the first magnetic attraction portion 34 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 portion 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force.

[0082] In this embodiment, the sound-generating device 100 may be a sound-generating unit of a speaker, and the speaker may be a micro speaker. Of course, the sound-generating device 100 may also be a speaker module, that is, a sound module structure, which is not limited here.

[0083] It should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged relative to each other. Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 can include a central magnetic portion 22 and a side magnetic portion 23, both of which are square structures. The vibration system 3 is also arranged in a square shape. It can be understood that the periphery of the diaphragm assembly 31 of the vibration system 3 can be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 can be respectively assembled on the outer shell or module shell, etc., which is not limited here.

[0084] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100. In one embodiment, as shown in Figures 3 to 5 and Figures 8 to 13, the sound-generating device 100 further includes a housing 1, the magnetic circuit system 2 is connected to one end of the housing 1, and the vibration system 3 is connected to the other end of the housing 1 and is arranged opposite to the magnetic circuit system 2, that is, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the other end of the housing 1 and is arranged opposite to the magnetic circuit system 2.

[0085] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The housing 1 in this embodiment can be optionally a square frame or frame structure, that is, the housing 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the housing 1 and are arranged relative to each other, so that the magnetic circuit system 2, the housing 1 and the diaphragm assembly 31 of the vibration system 3 enclose to form a vibration cavity.

[0086] It is understood that the sound-generating device 100 is used in an electronic device, that is, the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a housing or box structure independent of the electronic device. In this case, the housing 1 is used to integrate the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 into a whole structure, thereby facilitating assembly and disassembly. Of course, the housing 1 of the sound-generating device 100 can also be configured as an integrally molded structure with the housing or box structure of the electronic device, which can effectively improve the structural strength and sealing performance.

[0087] In this embodiment, the housing 1 is used to house and fix the vibration system 3 and magnetic circuit system 2, etc., so that the sound-generating device 100 can be used as an independent component in an electronic device or a sound module, without limitation here. Of course, in other embodiments, the sound-generating device 100 can also be a modular structure, in which case the vibration system 3 and magnetic circuit system 2 of the sound unit are installed as multiple independent components on the modular housing 1, without limitation here.

[0088] It will be appreciated that by configuring the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and side magnetic portions 23 disposed on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the housing 1 via the periphery of the magnetic yoke 21; alternatively, the magnetic circuit system 2 can be connected to the housing 1 via the side magnetic portions 23, without limitation. In this embodiment, the side magnetic portions 23 are located outside the central magnetic portion 22 and enclose a magnetic gap 24 with the central magnetic portion 22. This allows the diaphragm assembly 31 of the vibration system 3 to be connected to the end of the housing 1 away from the magnetic yoke 21 and to be opposite and spaced from the magnetic circuit system 2. This allows one end of the voice coil 32 to be connected to the diaphragm assembly 31, while the other end of the voice coil 32 is disposed corresponding to the magnetic gap 24.

[0089] It can be understood that the voice coil 32 can be a flat voice coil, in which case it is fixed to the side of the diaphragm assembly 31 facing the magnetic circuit system 2, and is opposite to and spaced from the magnetic gap 24 of the magnetic circuit system 2, that is, the other end of the voice coil 32 is located outside the magnetic gap 24, and along the vibration direction of the vibration system 3, the other end of the voice coil 32 is opposite to the magnetic gap 24; or, the voice coil 32 is a ring-shaped runway voice coil, in which case one end of the voice coil 32 is connected to the diaphragm assembly 31, and the other end of the voice coil 32 is suspended in the magnetic gap 24, which is not limited here.

[0090] In order to achieve electrical connection between the voice coil 32 and the external circuit, in one embodiment, as shown in Figures 3 to 5 and 8 to 13 , the vibration system 3 further includes a centering support 33 , one end of which is connected to the voice coil 32 , and the other end of which is connected to the housing 1 .

[0091] As will be appreciated, the ends of damper 33 are electrically connected to the leads of voice coil 32 and the external circuitry, respectively. In this embodiment, damper 33 can be positioned at the bottom of voice coil 32, at the four corners of sound-generating device 100, or along the minor or major axis of sound-generating device 100. Alternatively, damper 33 can be positioned at the top of voice coil 32, between voice coil 32 and diaphragm assembly 31, without limitation.

[0092] In this embodiment, a first magnetic attraction portion 34 is provided on the diaphragm assembly 31 of the vibration system 3, and a support member 4 is provided on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, and a second magnetic attraction portion 41 is provided on the support member 4, so that a first attraction force is provided between the first magnetic attraction portion 34 and the second magnetic attraction portion 41, and a second attraction force is provided between the first magnetic attraction portion 34 and the magnetic circuit system 2. When the sound-generating device 100 is in a non-working state, the vibration system 3 is located in a balanced position between the second magnetic attraction portion 41 and the magnetic circuit system 2 under the action of the combined force of the first attraction force and the second attraction force.

[0093] It is understood that when the vibration system 3 is operating, the combined force of the first and second suction forces is opposite to the direction of the strain recovery force of the vibration system 3 and is less than the strain recovery force of the diaphragm assembly 31. When the vibration system 3 stops operating, the equivalent stiffness of the combined force of the first and second suction forces is no greater than the stiffness of the vibration system 3. Under the action of the combined force of the first and second suction forces, the vibration system 3 is located in a balanced position between the second magnetic attraction portion 41 and the magnetic circuit system 2. In this way, by introducing a static magnetostatic force into the vibration system 3, the static magnetostatic force is used to reduce the stiffness of the vibration system 3, thereby achieving a significant improvement in low frequencies.

[0094] It should be noted that the first magnetic portion 34 is further provided with a second magnetic portion 41 and a magnetic circuit system 2 on both sides of the vibration direction of the diaphragm assembly 31 for attracting the first magnetic portion 34, that is, the second magnetic portion 41 and the magnetic circuit system 2 are respectively located on both sides of the first magnetic portion 34, so that when the first magnetic portion 34 vibrates with the vibration system 3, the first magnetic portion 34 can be close to the second magnetic portion 41 or close to the magnetic circuit system 2. Optionally, the second magnetic portion 41 and the magnetic circuit system 2 can be provided by magnets. In this embodiment, the magnetization direction of the second magnetic portion 41 is opposite to the magnetization direction of the central magnetic portion 22 of the magnetic circuit system 2.

[0095] When the first magnetic portion 34 approaches the second magnetic portion 41, it moves away from the magnetic circuit system 2. Consequently, the attraction between the first magnetic portion 34 and the second magnetic portion 41 increases, while the attraction between the first magnetic portion 34 and the magnetic circuit system 2 decreases. The combined force of the first and second attractive forces is directed toward the second magnetic portion 41. The total attractive force exerted on the first magnetic portion 34 acts as a force on the vibration system 3.

[0096] Based on the same principle, when the first magnetic portion 34 approaches the magnetic circuit system 2, it moves away from the second magnetic portion 41. Therefore, the attraction between the first magnetic portion 34 and the second magnetic portion 41 decreases, while the attraction between the first magnetic portion 34 and the magnetic circuit system 2 increases. The combined force of the first and second attractive forces is directed toward the magnetic circuit system 2. The total attractive force exerted on the first magnetic portion 34 acts as a force on the vibration system 3.

[0097] Optionally, when the vibration system 3 is in equilibrium, the attraction of the first magnetic portion 34 by the second magnetic portion 41 is equal to the attraction of the magnetic circuit system 2 , so as to prevent the attraction of the first magnetic portion 34 from affecting the equilibrium position of the vibration system 3 .

[0098] Specifically, taking the vibration system 3 vibrating in the up-and-down direction as an example, when the vibration system 3 is not operating, the diaphragm assembly 31 is in its initial position. When the vibration system 3 is operating, the voice coil 32 drives the diaphragm assembly 31 to vibrate up and down. When the diaphragm assembly 31 is above the initial position, the strain recovery force of the diaphragm 311 is directed downward. At this time, the first attraction between the first magnetic portion 34 and the second magnetic portion 41 is directed upward, and the second attraction between the first magnetic portion 34 and the magnetic circuit system 2 is directed downward. The first attraction is greater than the second attraction. The combined force of the first and second attraction forces is less than the strain recovery force of the diaphragm 311 and is directed upward. As a result, the combined force of the first and second attraction forces acts on the diaphragm 311 to offset a portion of the strain recovery force of the diaphragm 311. Similarly, when the diaphragm assembly 31 is located below the initial position, the direction of the strain recovery force of the diaphragm 311 is upward. At this time, the first suction force between the first magnetic part 34 and the second magnetic part 41 is upward, and the second suction force between the first magnetic part 34 and the magnetic circuit system 2 is downward, and the second suction force is greater than the first suction force. The combined force of the first suction force and the second suction force is less than the strain recovery force of the diaphragm 311 and is directed downward. Therefore, the combined force of the first suction force and the second suction force acts on the diaphragm 311 to offset part of the strain recovery force of the diaphragm.

[0099] In summary, when the vibration system 3 is operating, the resultant force of the first and second suction forces is in the opposite direction to the strain recovery force of the diaphragm 311 and is smaller than the strain recovery force of the diaphragm 311. When the vibration system 3 stops operating, the equivalent stiffness of the resultant force of the first and second suction forces is no greater than the stiffness of the diaphragm 311.

[0100] Specifically, when the sound-generating device 100 is in a non-operating state, the vibration system 3 is in an equilibrium position, and the equivalent stiffness of the resultant force of the first attraction force between the first magnetic portion 34 and the second magnetic portion 41 and the second attraction force between the first magnetic portion 34 and the magnetic circuit system 2 is no greater than the stiffness of the diaphragm 311. In other words, in the non-operating state, when the vibration system 3 is in an equilibrium position, the resultant force of the first attraction force between the first magnetic portion 34 and the second magnetic portion 41 and the second attraction force between the first magnetic portion 34 and the magnetic circuit system 2 cannot drive the diaphragm assembly 31 to vibrate, thereby preventing the influence of static magnetic force on the equilibrium position of the vibration system 3 when the sound-generating device 100 is in a non-operating state.

[0101] It should be noted that the force exerted on the vibration system 3 by the first attraction force between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the second attraction force between the first magnetic attraction part 34 and the magnetic circuit system 2 is not fixed. When the vibration system 3 deviates from its equilibrium position more, the first attraction force between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the second attraction force between the first magnetic attraction part 34 and the magnetic circuit system 2 exerts a greater force on the vibration system 3. When the vibration system 3 deviates from its equilibrium position less, the first attraction force between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the second attraction force between the first magnetic attraction part 34 and the magnetic circuit system 2 exert a smaller force on the vibration system 3. The static magnetic force performance is shown in Figure 21.

[0102] Specifically, the system stiffness Kms consists of two parts: the vibration system stiffness Km and the cavity stiffness Kb, that is, Kms = Km + Kb. Considering that the static magnetoforce is related to the position of the diaphragm assembly 31, similar to the system stiffness Kms, the stiffness generated by the static magnetoforce is defined as Kt, Kt = static magnetoforce / vibration direction displacement. At this time, the total stiffness of the system becomes: Kms = Km + Kb - Kt, where Kms is the system stiffness, Km is the vibration system 3 stiffness, and Kb is the cavity stiffness. At this time, as the displacement increases, the stiffness generated by the static magnetoforce increases and the system stiffness decreases. That is, the larger the amplitude, the "softer" the system, "matching" the trend of the BL(x) curve, and the low-frequency performance is higher, as shown in Figures 22 and 23.

[0103] The sound-generating device 100 of the present invention is provided with a support member 4 so that at least a portion of the support member 4 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, so that there is a first attraction force between the first magnetic attraction part 34 and the second magnetic attraction part 41, and a second attraction force between the first magnetic attraction part 34 and the magnetic circuit system 2. In this way, the first magnetic attraction part 34 interacts with the second magnetic attraction part 41 and the magnetic circuit system 2 respectively, and a static magnetic force is introduced into the vibration system 3, thereby effectively reducing the strain recovery force of the diaphragm assembly 31 during movement. The stiffness of the vibration system 3 is reduced by the static magnetic force, so that the compliance of the diaphragm assembly 31 is better, thereby greatly improving the low-frequency effect of the sound-generating device 100.

[0104] It can be understood that by setting the first magnetic attraction part 34 and the second magnetic attraction part 41, a static magnetic force is introduced into the vibration system 3, so that when the vibration system 3 is working, the resultant force of the first attraction force and the second attraction force is opposite to the direction of the strain recovery force of the diaphragm 311 and is smaller than the strain recovery force of the diaphragm 311; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first attraction force and the second attraction force is not greater than the stiffness of the diaphragm 311, and the stiffness of the vibration system 3 is reduced by the static magnetic force, so that the compliance of the diaphragm assembly 31 is better, thereby greatly improving the low-frequency effect of the sound-emitting device 100.

[0105] In one embodiment, the sound-emitting device 100 further includes a front cover 43, which is disposed on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2 and is formed as a support member 4. The periphery of the front cover 43 is connected to the periphery of the diaphragm assembly 31 to form a vibration space 431 between the front cover 43 and the diaphragm assembly 31, and the second magnetic attraction portion 41 is disposed on the front cover 43.

[0106] In this embodiment, as shown in Figures 6 to 10, 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 optionally used as a sound-generating unit of an earpiece. The front cover 43 of the sound-generating device 100 is at least partially located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, so that a vibration space 431 is formed between the front cover 43 and the diaphragm assembly 31. In other words, the front cover 43 forms a support member 4. The periphery of the front cover 43 is connected to the periphery of the diaphragm assembly 31. Optionally, the periphery of the diaphragm assembly 31 is sandwiched between the front cover 43 and the housing 1.

[0107] As will be understood, the second magnetic portion 41 is provided on the front cover 43. To facilitate smooth sound production by the sound-generating device 100, in this embodiment, the front cover 43 is further provided with a sound hole 432, which communicates with the vibration space 431. Optionally, the sound hole 432 is provided directly opposite the diaphragm assembly 31. To prevent dust, moisture, and other debris from passing through the sound hole 432 and affecting the sound production of the diaphragm assembly 31, the sound-generating device 100 further includes a mesh 5 that covers the sound hole 432.

[0108] In this embodiment, the number of sound holes 432 can be one or more. Alternatively, the number of sound holes 432 can be multiple, with the multiple sound holes 432 being arranged around the second magnetic portion 41. It is understood that the number of meshes 5 can be one or more. When there is one mesh 5, it covers all sound holes 432; when there are multiple meshes 5, one mesh 5 covers at least one sound hole 432.

[0109] In order to connect the periphery of the front cover 43 with the diaphragm assembly 31, the position of the second magnetic attraction portion 41 of the front cover 43 is spaced from the diaphragm assembly 31. It is understandable that the front cover 43 can optionally be an inverted U-shaped or pot cover or hat structure, which is not limited here.

[0110] In one embodiment, the sound-emitting device 100 also includes a module upper shell 44 and a module lower shell 45 that are connected to each other. The module upper shell 44 and the module lower shell 45 enclose an installation space 451. The magnetic circuit system 2 and the vibration system 3 are arranged in the installation space 451. The module upper shell 44 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2. The module upper shell 44 is formed as a support member 4, and the second magnetic attraction portion 41 is arranged on the module upper shell 44.

[0111] In this embodiment, as shown in Figures 1 to 5, the sound-generating device 100 can optionally be a sound-generating module structure. The sound-generating device 100 also includes a module housing, which is provided with an installation space 451. Optionally, the module housing includes a module upper shell 44 and a module lower shell 45. The magnetic circuit system 2 and the vibration system 3 are disposed within the installation space 451, such that the module upper shell 44 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, so that the module upper shell 44 forms a support member 4. Optionally, a second magnetic attraction portion 41 is disposed on the module upper shell 44.

[0112] As can be understood, as shown in Figures 4 and 5, the module upper shell 44 is provided with a support platform 441 surrounding the second magnetic attraction portion 41. The vibration system 3 is supported on the support platform 441 and encloses the module upper shell 44 to form a front acoustic cavity 46, with the diaphragm assembly 31 facing the front acoustic cavity 46. The magnetic circuit system 2 and the vibration system 3 are arranged in the installation space 451, so that the vibration system 3, the module upper shell 44, and the module lower shell 45 enclose a rear acoustic cavity 47, and the magnetic circuit system 2 is located in the rear acoustic cavity 47.

[0113] To facilitate smooth sound production by the sound-emitting device 100, the module housing further includes a sound outlet 442 that communicates with the front acoustic cavity 46. In this embodiment, the sound outlet 442 may be positioned directly opposite the diaphragm assembly 31, thereby providing the sound-emitting device 100 with a front sound-emitting structure. Of course, in other embodiments, the sound outlet 442 may not be positioned directly opposite the diaphragm assembly 31. Alternatively, the sound outlet 442 may be positioned on the side or periphery of the diaphragm assembly 31, thereby providing the sound-emitting device 100 with a side sound-emitting structure.

[0114] In this embodiment, the upper shell 44 of the module is also provided with a sound guide, which forms a sound outlet channel, one end of which is connected to the front sound cavity 46, and the other end of which is connected to the sound outlet hole 442. It can be understood that the two ends of the support platform 441 are respectively connected to the sound guide, so that the support platform 441 and the sound guide are enclosed to form a mounting groove or groove structure. In order to facilitate the installation and fixation of the vibration system 3, the support platform 441 can be a flat support platform structure, and the support platform 441 can also be arranged in a stepped structure so that the peripheral support of the vibration system 3 is fixed to the stepped structure, which is not limited here.

[0115] It is understood that to further enhance the sound quality of the sound-generating device 100, the rear acoustic cavity 47 of the sound-generating device 100 may be filled with sound-absorbing particles. To prevent the sound-absorbing particles from entering the space between the vibration system 3 and the magnetic circuit system 2, the sound-generating device 100 further includes an isolating and breathable structure, which is disposed within the rear acoustic cavity 47 and blocks the sound-absorbing particles. This is not limited herein.

[0116] It should be noted that the structure of the support member 4 is not limited to the structural form of the front cover 43 and the module upper shell 44, and can also be other structural design forms, as long as it can support and fix the second magnetic part 41, which is not limited here.

[0117] It is understandable that the support member 4 can be made of metal, plastic, or injection molded from metal and plastic, and this is not limited here. Optionally, the second magnetic portion 41 is bonded to the support member 4. For example, the second magnetic portion 41 can be fixed to the support member 4 by bonding with an adhesive layer. Of course, in other embodiments, the second magnetic portion 41 can also be welded to the support member 4, for example, the second magnetic portion 41 can be fixed to the support member 4 by soldering, and this is not limited here.

[0118] In order to facilitate the processing of the support member 4 and improve the connection strength between the support member 4 and the second magnetic attraction portion 41, the second magnetic attraction portion 41 is optionally integrally injection molded with the support member 4. In this embodiment, the second magnetic attraction portion 41 is optionally made of a magnetic conductive material.

[0119] Optionally, the second magnetic attraction portion 41 is a magnet. In this embodiment, a second attractive force exists between the first magnetic attraction portion 34 and the central magnetic portion 22, and the magnetization direction of the second magnetic attraction portion 41 is opposite to the magnetization direction of the central magnetic portion 22. Optionally, the magnetization direction of the second magnetic attraction portion 41 is opposite to the magnetization direction of the central magnet 221 in the central magnetic portion 22. As a result, 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 22 and repel each other. The two parts of the magnetic flux lines pass through the voice coil 32 horizontally, thereby increasing the strength of the magnetic flux lines acting on the voice coil 32, increasing the BL value of the product, and further improving the sound sensitivity of the sound-emitting device 100.

[0120] In one embodiment, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing the diaphragm assembly 31; and / or, the second magnetic attraction portion 41 is arranged on the side of the support member 4 facing away from the diaphragm assembly 31; 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.

[0121] It is understood that the second magnetic portion 41 can be disposed on at least one side of the support member 4, that is, the second magnetic portion 41 can be disposed on one side or on two opposing sides of the support member 4. In this embodiment, the support member 4 has an upper surface and a lower surface disposed in opposite directions, with the lower surface facing the diaphragm assembly 31. In this case, the second magnetic portion 41 can be disposed on the upper surface; the second magnetic portion 41 can also be disposed on the lower surface, as shown in Figures 4, 5, 9, and 10; the second magnetic portion 41 can also be disposed on both the upper and lower surfaces.

[0122] Of course, the second magnetic portion 41 can also be disposed in the support member 4, that is, the second magnetic 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 a mounting cavity, and the second magnetic portion 41 is disposed in the mounting cavity.

[0123] In one embodiment, the second magnetic portion 41 includes multiple portions. It is understood that the multiple second magnetic portions 41 can be simultaneously disposed on the same side of the support member 4; or, the multiple second magnetic portions 41 can be simultaneously disposed on different sides of the support member 4. For example, the multiple second magnetic portions 41 can be simultaneously disposed on the upper surface or the lower surface of the support member 4; or, the multiple second magnetic portions 41 can be simultaneously disposed on the upper surface and the lower surface of the support member 4, without limitation.

[0124] It is understood that when multiple second magnetic portions 41 are disposed on the same side of the support member 4, the multiple second magnetic portions 41 are arranged in a spliced ​​manner. For example, two adjacent second magnetic portions 41 among the multiple second magnetic portions 41 are arranged closely together, i.e., there is no gap. When multiple second magnetic portions 41 are disposed on the same side of the support member 4, the multiple second magnetic portions 41 are arranged in an interval manner. For example, there is a gap between two adjacent second magnetic portions 41 among the multiple second magnetic portions 41.

[0125] Optionally, the second magnetic portion 41 is circular, elliptical, or polygonal. That is, the shape of the second magnetic portion 41 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the second magnetic portion 41 and the first magnetic portion 34, the structure of the second magnetic portion 41 can be symmetrical or regular, without limitation.

[0126] In this embodiment, the second magnetic portion 41 and the first magnetic portion 34 are optionally arranged to face each other. As will be appreciated, this arrangement ensures the magnetic attraction between the second magnetic portion 41 and the first magnetic portion 34. To further ensure the balance of the vibration system 3 of the sound-generating device 100, the central axis of the second magnetic portion 41 can optionally coincide with the central axis of the sound-generating device 100.

[0127] In one embodiment, as shown in FIG. 5 and FIG. 10 , a mounting groove 42 is provided on a side of the support member 4 facing the diaphragm assembly 31 , and the second magnetic portion 41 is disposed in the mounting groove 42 .

[0128] In this embodiment, the mounting groove 42 can be a groove structure formed by a concave groove on one side of the support member 4, or a concave structure formed by a concave groove on one side of the support member 4, so that the other side is raised, without limitation. It is understood that the mounting groove 42 can be provided on the lower surface of the support member 4. Of course, in other embodiments, the mounting groove 42 can be provided on the upper surface of the support member 4, without limitation.

[0129] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312 disposed on the diaphragm 311 , and the first magnetic portion 34 is disposed on the vibration plate 312 .

[0130] In this embodiment, as shown in Figures 3 to 5 and 8 to 13, the diaphragm 311 includes a rim portion, a fixed portion connected to the outer side of the rim portion, and a central portion connected to the inner side of the rim portion. The vibration plate 312 is disposed in the central portion. It will be appreciated that the fixed portion, rim portion, and central portion of the diaphragm 311 are sequentially connected to form an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 311. Optionally, the rim portion of the diaphragm 311 may have an upwardly protruding convex structure or a downwardly concave structure, which is not limited here.

[0131] As will be appreciated, the vibration plate 312 disposed in the center of the diaphragm 311 effectively strengthens the structural strength of the center portion of the diaphragm 311. By disposing the first magnetic portion 34 on the vibration plate 312, the first magnetic portion 34 interacts with the second magnetic portion 41 or the magnetic circuit system 2 to generate a static magnetic force, thereby changing the stiffness of the diaphragm 311. Alternatively, the center portion of the diaphragm 311 may be a flat plate or an annular structure.

[0132] Optionally, a receiving groove is provided in the central portion of the diaphragm 311, and at least a portion of the vibration plate 312 is located within the receiving groove. It will be appreciated that by providing the receiving groove on the side of the diaphragm 311 facing away from the voice coil 32, the receiving groove can be conveniently utilized to install and accommodate the vibration plate 312, ensuring that the upper surface of the vibration plate 312 is flush with the upper surface of the diaphragm 311, thereby reducing the height of the sound-generating device 100 along the vibration direction of the vibration system 3 and ensuring the vibration performance of the entire diaphragm assembly 31.

[0133] To reduce the weight of the diaphragm assembly 31, the diaphragm 311 is provided with an inner annular hole 3111, and the vibration plate 312 is disposed over the inner annular hole 3111. In this embodiment, the inner annular hole 3111 is provided in the center of the diaphragm 311, and the periphery of the vibration plate 312 is connected to the center. The vibration plate 312 can be connected to the side of the center of the diaphragm 311 facing the voice coil 32 or the side facing away from the voice coil 32.

[0134] Optionally, a stepped surface is formed on the periphery of the vibration plate 312, and the side of the diaphragm 311 adjacent to the inner ring hole 3111 is supported and connected to the stepped surface, and the stepped surface is located between the voice coil 32 and the diaphragm 311. It can be understood that by providing the stepped surface on the periphery of the vibration plate 312 so that the stepped surface is recessed toward the side of the voice coil 32, it is ensured that when the central portion of the diaphragm 311 is overlapped and supported on the stepped surface of the vibration plate 312, the upper surface of the central portion of the diaphragm 311 is flush with the upper surface of the vibration plate 312, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 31.

[0135] In one embodiment, the first magnetic portion 34 may be a magnetic conductive plate 341 made of SPCC or SUS430. Of course, the vibration plate 312 may also be made of a magnetic conductive sheet to form the first magnetic portion 34.

[0136] In one embodiment, the first magnetic portion 34 is bonded to the vibration plate 312. For example, the first magnetic portion 34 can be connected to the vibration plate 312 using glue. Alternatively, the first magnetic portion 34 can be welded to the vibration plate 312. For example, the first magnetic portion 34 can be connected to the vibration plate 312 using soldering. Of course, in other embodiments, the first magnetic portion 34 and the vibration plate 312 can also be integrally injection molded, that is, the first magnetic portion 34 and the vibration plate 312 are processed into an integral structure using injection molding, which is not limited here.

[0137] In one embodiment, the first magnetic attraction portion 34 is arranged on the side of the vibration plate 312 facing the support member 4; and / or, the first magnetic attraction portion 34 is arranged on the side of the vibration plate 312 facing the central magnetic portion 22; and / or, a fixed cavity is provided in the vibration plate 312, and the first magnetic attraction portion 34 is arranged in the fixed cavity.

[0138] It is understood that the first magnetic portion 34 can be disposed on at least one side of the vibration plate 312, that is, the first magnetic portion 34 can be disposed on one side or on two opposite sides of the vibration plate 312. In this embodiment, the vibration plate 312 has a first surface 3121 and a second surface 3122 disposed opposite to each other, with the first surface 3121 facing the support member 4. In this case, the first magnetic portion 34 can be disposed on the first surface 3121, as shown in Figures 4, 5, 9, 10 to 12, and 14; the first magnetic portion 34 can also be disposed on the second surface 3122, or can be disposed on both the first surface 3121 and the second surface 3122, as shown in Figures 13, 15, and 16.

[0139] Of course, the first magnetic portion 34 can also be disposed in the vibration plate 312, that is, the first magnetic portion 34 is embedded in the vibration plate 312 or injection molded in the vibration plate 312. In one embodiment, a fixed cavity is defined in the vibration plate 312, and the first magnetic portion 34 is disposed in the fixed cavity.

[0140] In one embodiment, the first magnetic portion 34 includes multiple first magnetic portions 34. It is understood that the multiple first magnetic portions 34 can be simultaneously disposed on the same side of the vibration plate 312; or, the multiple first magnetic portions 34 can be simultaneously disposed on different sides of the vibration plate 312. For example, the multiple first magnetic portions 34 can be simultaneously disposed on the first surface 3121 or the second surface 3122 of the vibration plate 312; or, the multiple first magnetic portions 34 can be simultaneously disposed on both the first surface 3121 and the second surface 3122 of the vibration plate 312, without limitation.

[0141] It is understood that when multiple first magnetic portions 34 are disposed on the same side of the vibration plate 312, the multiple first magnetic portions 34 are arranged in a spliced ​​arrangement. For example, two adjacent first magnetic portions 34 among the multiple first magnetic portions 34 are arranged closely together, i.e., there is no gap. When multiple first magnetic portions 34 are disposed on the same side of the vibration plate 312, the multiple first magnetic portions 34 are arranged in an interval arrangement. For example, there is a gap between two adjacent first magnetic portions 34 among the multiple first magnetic portions 34.

[0142] Optionally, the first magnetic portion 34 is circular, elliptical, or polygonal. That is, the shape of the first magnetic portion 34 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the second magnetic portion 41 and the first magnetic portion 34, the structure of the first magnetic portion 34 can be symmetrical or regular, without limitation.

[0143] In this embodiment, the second magnetic portion 41 and the first magnetic portion 34 are optionally arranged to face each other. As will be appreciated, this arrangement ensures the magnetic attraction between the second magnetic portion 41 and the first magnetic portion 34. To further ensure the balance of the vibration system 3 of the sound-generating device 100, the central axis of the first magnetic portion 34 can optionally coincide with the central axis of the sound-generating device 100.

[0144] In another embodiment, the first magnetic portion 34 is a magnetic material coating 342 disposed on the vibration plate 312 .

[0145] In this embodiment, as shown in FIG18 , the first magnetic portion 34 can be made of a mixture of magnetically conductive material particles and an adhesive, which is bonded to the vibration plate 312. Of course, the first magnetic portion 34 can also be made of any soft magnetic material, such as pure iron, nickel, or alloys. Alternatively, a permanent magnetic material with inherent magnetism, such as ferrite or precious metal alloys, can be used. It should be noted that when a permanent magnet is used for the first magnetic portion 34, it is necessary to ensure that the first magnetic portion 34 does not generate a repulsive force on the second magnetic portion 41 or the magnetic circuit system 2.

[0146] It can be understood that the first magnetic attraction part 34 is arranged on the vibration plate 312 and is located between the second magnetic attraction part 41 and the magnetic circuit system 2, so that the first magnetic attraction part 34 can vibrate back and forth between the second magnetic attraction part 41 and the magnetic circuit system 2 within the effective vibration range of the vibration system 3.

[0147] It should be noted that the first magnetic portion 34 is simultaneously attracted by the second magnetic portion 41 and the magnetic circuit system 2, and these two attractive forces act in opposite directions. As the first magnetic portion 34 approaches the second magnetic portion 41 / magnetic circuit system 2, the attractive force between it and the second magnetic portion 41 / magnetic circuit system 2 increases, while the attractive force between it and the other magnetic circuit system 2 / the second magnetic portion 41 decreases. The total attractive force exerted on the vibration system 3 by the first magnetic portion 34 is the force exerted on the vibration system 3.

[0148] Optionally, the first magnetic portion 34 can be located midway between the second magnetic portion 41 and the magnetic circuit system 2, or at a position offset from the center of the second magnetic portion 41 and the magnetic circuit system 2. This ensures that when the vibration system 3 is in a balanced position, the attraction from the second magnetic portion 41 to the first magnetic portion 34 is equal to the attraction from the magnetic circuit system 2. Under this design, the size of the first magnetic portion 34 can be optimized to ensure that it can be mounted on the vibration plate 312. Of course, if necessary, the first magnetic portion 34 can be set within the vibration plate 312 to ensure that the total attraction from the two magnetic regions to the first magnetic portion 34 is zero when in a balanced position.

[0149] In one embodiment, as shown in FIG18 , the magnetic material coating 342 includes a coating layer 3421 and magnetic powder 3422. It is understood that the magnetic powder 3422 is doped or mixed into the coating layer 3421. Optionally, the magnetic powder 3422 is 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 sendust powder, without limitation herein.

[0150] In one embodiment, the magnetic material coating 342 is provided on the side of the vibration plate 312 facing the support member 4; and / or, the magnetic material coating 342 is provided on the side of the vibration plate 312 facing the central magnetic portion 22; and / or, a fixed cavity is provided in the vibration plate 312, and the magnetic material coating 342 is provided in the fixed cavity.

[0151] It is understood that the magnetic material coating 342 can be provided on at least one side of the vibration plate 312, that is, the magnetic material coating 342 can be provided on one side or on two opposite sides of the vibration plate 312. In this embodiment, the vibration plate 312 has a first surface 3121 and a second surface 3122 that are disposed opposite to each other, and a peripheral side surface 3123 connecting the first surface 3121 and the second surface 3122. The first surface 3121 faces the support member 4. In this case, the magnetic material coating 342 can be provided on the first surface 3121, as shown in FIG14; the magnetic material coating 342 can also be provided on the second surface 3122; the magnetic material coating 342 can also be provided on both the first surface 3121 and the second surface 3122, as shown in FIG13, FIG15 and FIG16.

[0152] Of course, the magnetic material coating 342 can also be disposed in the vibration plate 312, that is, the magnetic material coating 342 is embedded in the vibration plate 312 or injection molded in the vibration plate 312. In one embodiment, a fixed cavity is defined in the vibration plate 312, and the magnetic material coating 342 is disposed in the fixed cavity.

[0153] Optionally, as shown in Figures 13 to 15 , the magnetic material coating 342 covers at least a portion of the first surface 3121. Optionally, as shown in Figures 13 and 15 , the magnetic material coating 342 covers at least a portion of the second surface 3122. Optionally, as shown in Figure 17 , the magnetic material coating 342 covers the first surface 3121 and the peripheral side surface 3123. Optionally, the magnetic material coating 342 covers the second surface 3122 and the peripheral side surface 3123. Optionally, as shown in Figure 16 , the magnetic material coating 342 covers the first surface 3121, the peripheral side surface 3123, and the second surface 3122, without limitation herein.

[0154] In one embodiment, multiple magnetic material coatings 342 are provided. It is understood that multiple magnetic material coatings 342 can be disposed simultaneously on the same side of the vibration plate 312, or multiple magnetic material coatings 342 can be disposed simultaneously on different sides of the vibration plate 312. For example, multiple magnetic material coatings 342 can be disposed simultaneously on the first surface 3121 or the second surface 3122 of the vibration plate 312, or multiple magnetic material coatings 342 can be disposed simultaneously on both the first surface 3121 and the second surface 3122 of the vibration plate 312, without limitation.

[0155] It will be appreciated that when multiple magnetic coatings 342 are disposed on the same side of the vibration plate 312, the multiple magnetic coatings 342 are arranged in a spliced ​​arrangement. For example, two adjacent magnetic coatings 342 within the multiple magnetic coatings 342 are arranged closely together, i.e., there is no gap. When multiple magnetic coatings 342 are disposed on the same side of the vibration plate 312, the multiple magnetic coatings 342 are arranged in an interval arrangement. For example, there is a gap between two adjacent magnetic coatings 342 within the multiple magnetic coatings 342.

[0156] Optionally, the magnetic material coating 342 is circular, elliptical, or polygonal. That is, the shape of the magnetic material coating 342 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the second magnetic attraction portion 41 and the magnetic material coating 342, the structure of the magnetic material coating 342 can be symmetrical or regular, without limitation.

[0157] In this embodiment, the second magnetic portion 41 and the magnetic coating 342 are optionally positioned opposite each other. As will be appreciated, this arrangement ensures the magnetic attraction between the second magnetic portion 41 and the magnetic coating 342. To further ensure the balance of the vibration system 3 of the sound-generating device 100, the central axis of the magnetic coating 342 can optionally coincide with the central axis of the sound-generating device 100.

[0158] In one embodiment, as shown in Figures 3, 8, 9, 11 to 13, 19 and 20, the diaphragm 311 is provided with an inner ring hole 3111, the vibration plate 312 is covered on the inner ring hole 3111, and the vibration plate 312 is provided with a recessed portion 3124. The recessed portion 3124 is formed by the side of the vibration plate 312 facing away from the central magnetic portion 22 being recessed toward the central magnetic portion 22, and the first magnetic attraction portion 34 is provided in the recessed portion 3124.

[0159] It is understood that the recessed portion 3124 may be a groove structure recessed in the vibration plate 312. The recessed portion 3124 may be formed by the side of the vibration plate 312 facing away from the central magnetic portion 22 being recessed toward the central magnetic portion 22; or the recessed portion 3124 may be formed by the side of the vibration plate 312 facing the central magnetic portion 22 being recessed toward the support member 4, without limitation herein.

[0160] In one embodiment, the central magnetic portion 22 includes a stacked central magnet 221 and a central magnetic conductive plate 222 . The central magnet 221 is connected to the magnetic conductive yoke 21 . The central magnetic conductive plate 222 has a recessed area 223 corresponding to the first magnetic attraction portion 34 .

[0161] In this embodiment, as shown in Figures 3 to 5 and 8 to 13, the central magnetic portion 22 includes one or more central magnets 221 and a central magnetic plate 222. The central magnets 221 and the central magnetic plate 222 are stacked. When there are multiple central magnets 221 and multiple central magnetic plates 222, the multiple central magnets 221 and the multiple central magnetic plates 222 are alternately stacked, and one central magnet 221 is connected to the magnetic yoke 21. When there is only one central magnet 221 and one central magnetic plate 222, the central magnet 221 is sandwiched between the central magnetic plate 222 and the magnetic yoke 21.

[0162] Optionally, the central magnetic portion 22 may be provided in an annular structure, such that a through-hole structure is formed in the center of the central magnetic portion 22. Of course, in other embodiments, the central magnetic portion 22 includes multiple strip-shaped structures, which enclose a ring-shaped structure, and the multiple strip-shaped structures enclose a through-hole structure, which is not limited here. Alternatively, the central magnetic portion 22 may be a square plate-shaped structure, which is not limited here.

[0163] It can be understood that the central magnetic conductive plate 222 is arranged in an integral ring shape, so that a recessed area 223 is formed in the center of the central magnetic conductive plate 222. Of course, in other embodiments, the central magnetic conductive plate 222 includes multiple central magnetic conductive plates 222, and the multiple central magnetic conductive plates 222 are surrounded in an annular shape to form the recessed area 223; or, the central magnetic conductive plate 222 is a plate-like structure, which is not limited here. Optionally, the central magnet 221 can be optionally arranged in an annular shape, that is, the central magnet 221 is arranged in an integral ring shape, so that a second through hole is formed in the center of the central magnet 221. Of course, in other embodiments, the central magnet 221 includes multiple central magnets 221, and the multiple central magnets 221 are surrounded in an annular shape to form the second through hole; or, the central magnet 221 is a plate-like structure, which is not limited here.

[0164] In this embodiment, by providing a recessed area 223 on the central magnetic conductive plate 222 of the central magnetic portion 22, the influence of the magnetic focusing effect of the central magnetic conductive plate 222 on the second attractive force can be reduced, thereby effectively increasing the magnetic attractive force between the first magnetic attraction portion 34 and the central magnet 221. It can be understood that the provision of the recessed area 223 is also conducive to avoiding the recessed portion 3124 of the vibration plate 312. Optionally, a portion of the central magnetic conductive plate 222 is recessed in a direction away from the diaphragm assembly 31 to form the recessed area 223. Of course, in other embodiments, the recessed area 223 is a through-hole structure that passes through the central magnetic conductive plate 222.

[0165] It is understandable that the recessed area 223 may be a through hole or notch structure penetrating the central magnetic conductive plate 222. Of course, the recessed area 223 may also be a groove structure formed by the central magnetic conductive plate 222 being recessed in a direction away from the diaphragm assembly 31, which is not limited here.

[0166] In one embodiment, the recessed area 223 is a through hole, and the central magnet 221 is provided with a protrusion 224 corresponding to the through hole. The protrusion 224 is located in the through hole, and the end surface of the protrusion 224 facing the diaphragm 311 does not exceed the end surface of the central magnetic conductive plate 222 facing the diaphragm 311.

[0167] In this embodiment, as shown in Figures 10 and 12, by providing a protrusion 224 on the central magnet 221, the protrusion 224 is located in the through hole, which can effectively increase the magnetic attraction between the central magnet 221 and the first magnetic attraction portion 34. It can be understood that in order to prevent the protrusion 224 of the central magnet 221 from affecting the vibration of the recessed portion 3124 of the vibration plate 312 when the diaphragm 311 vibrates, optionally, the end surface of the protrusion 224 facing the diaphragm 311 does not exceed the end surface of the central magnetic plate 222 facing the diaphragm 311, thereby effectively avoiding the recessed portion 3124 of the vibration plate 312. Optionally, the recessed area 223 is provided corresponding to the recessed portion 3124, which is not limited here.

[0168] In one embodiment, the side magnet portion 23 includes side magnets and side magnetic conductive plates disposed on the side magnets. As will be appreciated, as shown in Figures 3 to 13 , the side magnets and side magnetic conductive plates of the side magnet portion 23 are stacked on the magnetic yoke 21, with the side magnets connected to the magnetic yoke 21. The side magnets and side magnetic conductive plates of the side magnet portion 23 are located outside the central magnetic portion 22 and separated to form a magnetic gap 24.

[0169] In one embodiment, the edge magnet portion 23 may be annular, in which case the annular edge magnet portion 23 is located outside the central magnet portion 22 and is spaced apart from the central magnet portion 22 to form a magnetic gap 24. Optionally, the edge magnets and / or the edge magnetic conductive plates form a closed, integrated annular structure.

[0170] Of course, in other embodiments, the edge magnetic portion 23 includes a plurality of edge magnetic portions 23, and the plurality of edge magnetic portions 23 are arranged around the outside of the central magnetic portion 22, and are spaced apart from the central magnetic portion 22 to form a magnetic gap 24. Optionally, both the edge magnets and the edge magnetic conductive plates are multiple, and are arranged one-to-one, and adjacent edge magnets are connected end to end to form a closed annular structure. Alternatively, the edge magnets form a closed integral annular structure, the edge magnetic conductive plates are multiple, and adjacent edge magnetic conductive plates are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnets; or, the edge magnetic conductive plates form a closed integral annular structure, the edge magnets are multiple, and adjacent edge magnets are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnetic conductive plates. This is not limited here.

[0171] It should be noted that, in order to facilitate the installation of the centering support piece 33, multiple side magnets 23 are arranged around the outside of the central magnet part 22, and a gap is provided between two adjacent side magnets 23 for avoiding the centering support piece 33, which is not limited here.

[0172] In one embodiment, a positioning post is provided on the periphery of the side of the housing 1 facing away from the diaphragm assembly 31. A positioning notch is provided on the magnetic yoke 21 corresponding to the positioning post, and the positioning post and the positioning notch are positioned and engaged. It will be appreciated that by providing the positioning post on the housing 1 and forming the positioning notch on the magnetic yoke 21 to engage with the positioning post, the magnetic circuit system 2 can be positioned and installed, thereby improving installation convenience and accuracy.

[0173] In this embodiment, as shown in Figures 3 to 13, the edge magnetic portion 23 includes stacked edge magnets and edge magnetic conductive plates. The edge magnets are sandwiched between the edge magnetic conductive plates and the magnetic conductive yoke 21. The edge magnetic conductive plates are connected to the housing 1. Optionally, the edge magnetic conductive plates and the housing 1 are integrally formed, which can simplify the structure and improve installation stability.

[0174] In one embodiment, the centering supports 33 include multiple ones, one ends of the multiple centering supports 33 are respectively connected to the voice coil 32 and are respectively electrically connected to the leads of the voice coil 32, and the other ends of the multiple centering supports 33 are respectively connected to the housing 1, thereby improving the operating stability of the vibration system 3.

[0175] Optionally, multiple centering supports 33 are distributed along the long axis direction and / or short axis direction of the magnetic circuit system 2 and / or the diagonal or four corner positions of the magnetic circuit system 2. It is understandable that multiple centering supports 33 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; multiple centering supports 33 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; multiple centering supports 33 can also be arranged in correspondence at the diagonal positions of the magnetic circuit system 2; multiple centering supports 33 can also be arranged in correspondence at the four corner positions of the magnetic circuit system 2. Of course, in other embodiments, multiple centering supports 33 can be distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, and this is not limited here.

[0176] Optionally, the centering supports 33 include two or four. This arrangement can not only utilize the centering supports 33 to connect the voice coil 32 to the external circuit, but also ensure the vibration balance of the sound-generating device 100.

[0177] It is understood that when there are two centering supports 33, the two centering supports 33 are spaced apart along the long axis of the magnetic circuit system 2; alternatively, the two centering supports 33 are spaced apart along the short axis of the magnetic circuit system 2, without limitation. Of course, when there are four centering supports 33, the four centering supports 33 can also be positioned at the four corners of the magnetic circuit system 2. The present invention does not specifically limit the arrangement of the centering supports 33.

[0178] In one embodiment, each centering support 33 includes a first connection portion, an elastic arm, and a second connection portion connected in sequence. The first connection portion is connected to the voice coil 32 and electrically connected to the lead of the voice coil 32 , and the second connection portion is connected to the housing 1 .

[0179] In this embodiment, as shown in Figures 3 and 8 , the first connecting portion, elastic arm, and second connecting portion of the centering arm 33 can be integrally formed. This effectively ensures the structural strength of the centering arm 33 while simplifying the processing steps for the centering arm 33. As will be appreciated, to ensure the deformability of the centering arm 33, the elastic arm has at least one bend.

[0180] In one embodiment, as shown in Figures 3 and 8 , the first connection portion, the elastic arm, and the second connection portion of damper 33 may be located in the same plane. Of course, in other embodiments, the first and second connection portions of damper 33 may also be located in different planes. It will be appreciated that damper 33 can be used to connect the external circuit to voice coil 32 and effectively prevent issues such as oscillation or polarization of voice coil 32 during vibration.

[0181] The present invention also provides an electronic device including the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be detailed here.

[0182] In one embodiment, the electronic device further includes a device housing and a flexible circuit board. The sound-generating device 100 is disposed in the device housing. One end of the flexible circuit board is electrically connected to the sound-generating device 100, and the other end of the flexible circuit board is used to connect to an external power supply.

[0183] It is understood that the flexible circuit board is used to connect the external circuit to the sound device 100. The flexible circuit board has inner pads and outer pads. The inner pads of the flexible circuit board are connected to the sound device 100, and the outer pads of the flexible circuit board are used to connect to external terminals.

[0184] In this embodiment, the device housing has a cavity, the sound-generating device 100 is disposed within the cavity of the device housing, and at least one end of the flexible printed circuit board connected to the sound-generating device 100 is located within the cavity of the device housing. Of course, in other embodiments, the flexible printed circuit board may be entirely disposed within the cavity of the device housing, and this is not a limitation here.

[0185] It is understood that the electronic device may be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., and is not limited here. In the electronic device, the sound-emitting device 100 may be assembled into the housing of the electronic device in a modular manner or in a single unit. The electronic device may be a mobile phone, an MP3 player, an MP4 player, a tablet computer, a headset, a wearable device, etc., and is not listed here one by one.

[0186] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises: A magnetic circuit system comprising a magnetic yoke and a central magnetic portion and a side magnetic portion provided on the magnetic yoke, wherein the central magnetic portion and the side magnetic portion are spaced apart to form a magnetic gap; a vibration system, the vibration system being disposed on one side of the magnetic circuit system, the vibration system comprising a diaphragm assembly and a voice coil, one end of the voice coil being connected to the diaphragm assembly, and an end of the voice coil being away from the diaphragm assembly being disposed corresponding to the magnetic gap; and a support member, at least a portion of which is located on a side of the diaphragm assembly facing away from the magnetic circuit system; In which, the diaphragm assembly is provided with a first magnetic attraction part, the support member 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, and there is a second attraction force between the first magnetic attraction part and the magnetic circuit system. When 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, wherein: The sound-emitting device also includes a front cover, which is arranged on the side of the diaphragm assembly facing away from the magnetic circuit system and forms the support member. The periphery of the front cover is connected to the periphery of the diaphragm assembly to form a vibration space between the front cover and the diaphragm assembly, and the second magnetic attraction part is arranged on the front cover.

3. The sound-generating device according to claim 1, wherein: The sound-emitting device also includes a module upper shell and a module lower shell connected to 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 diaphragm assembly facing away from the magnetic circuit system, the module upper shell is formed as the support member, and the second magnetic attraction part is arranged on the module upper shell.

4. The sound-generating device according to claim 1, wherein: The diaphragm assembly includes a diaphragm and a vibration plate arranged on the diaphragm, and the first magnetic attraction portion is arranged on the vibration plate.

5. The sound-generating device according to claim 4, wherein: The first magnetic attraction portion is bonded to the vibration plate; or the first magnetic attraction portion and the vibration plate are integrally injection-molded; And / or, the first magnetic attraction portion is provided on a side of the vibration plate facing the support member; And / or, the first magnetic attraction portion is provided on a side of the vibration plate facing the central magnetic portion; And / or, a fixed cavity is provided in the vibration plate, and the first magnetic attraction part is provided in the fixed cavity.

6. The sound-generating device according to claim 4, wherein: The first magnetic attraction parts include a plurality of parts; the plurality of first magnetic attraction parts are arranged on the same side or different sides of the vibration plate; and / or the plurality of first magnetic attraction parts are arranged in a spliced ​​manner or in an interval manner; And / or, the first magnetic attraction portion is circular, elliptical or polygonal; And / or, the central axis of the first magnetic attraction portion coincides with the central axis of the sound-generating device; And / or, the first magnetic attraction portion is a magnetic conductive plate, and the material of the magnetic conductive plate is SPCC or SUS430; And / or, the vibration plate is made of a magnetic conductive sheet to form the first magnetic attraction portion.

7. The sound-generating device according to claim 4, wherein: The first magnetic attraction portion is a magnetic material coating provided on the vibration plate.

8. The sound-generating device according to claim 7, wherein: The magnetic material coating comprises a coating layer and magnetic powder, wherein the magnetic powder is doped or mixed in the coating layer; the magnetic powder is 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 sendust powder; And / or, the magnetic material coating is provided on a side of the vibration plate facing the support member; And / or, the magnetic material coating is provided on a side of the vibration plate facing the central magnetic portion.

9. The sound-generating device according to claim 7, wherein: The magnetic material coatings include a plurality of coatings; the plurality of coatings are arranged on the same side or different sides of the vibration plate; and / or the plurality of coatings are arranged in a spliced ​​manner or in an interval manner; And / or, the magnetic material coating is circular, elliptical or polygonal; And / or, the central axis of the magnetic material coating coincides with the central axis of the sound-generating device; And / or, the vibration plate has a first surface and a second surface that are disposed opposite to each other, and a peripheral side surface connecting the first surface and the second surface; The magnetic material coating covers at least a portion of the first surface; and / or, the magnetic material coating covers at least a portion of the second surface; and / or, the magnetic material coating covers the first surface and the peripheral side surface; and / or, the magnetic material coating covers the second surface and the peripheral side surface.

10. The sound-generating device according to claim 4, wherein: The central magnetic portion includes a stacked central magnet and a central magnetic conductive plate, the central magnet is connected to the magnetic conductive yoke, and the central magnetic conductive plate has a recessed area corresponding to the first magnetic attraction portion; Part of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly 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 10, wherein: The diaphragm is provided with an inner ring hole, the vibration plate cover is provided on the inner ring hole, the vibration plate is provided with a recessed portion, the recessed portion is formed by the side of the vibration plate facing away from the central magnetic portion and recessed toward the central magnetic portion, and the first magnetic attraction portion is provided in the recessed portion.

12. The sound generating device according to claim 10, wherein: The recessed area is a through hole, and the central magnet is provided with a protrusion corresponding to the through hole. The protrusion is located in the through hole, and the end surface of the protrusion facing the diaphragm does not exceed the end surface of the central magnetic conductive plate facing the diaphragm.

13. The sound generating device according to any one of claims 1 to 12, characterized in that: The second magnetic attraction portion is bonded to the support member; or the second magnetic attraction portion and the support member are integrally injection-molded; And / or, the second magnetic attraction portion is provided on a side of the support member facing the diaphragm assembly; And / or, the second magnetic attraction portion is provided on a side of the support member facing away from the diaphragm assembly; And / or, a mounting cavity is provided in the support member, and the second magnetic attraction portion is provided in the mounting cavity.

14. The sound-generating device according to claim 1, wherein: The second magnetic attraction portion includes a plurality of portions; the plurality of second magnetic attraction portions are arranged on the same side or different sides of the support member; and / or the plurality of second magnetic attraction portions are arranged in a spliced ​​manner or in an interval manner; And / or, the second magnetic attraction portion is circular, elliptical or polygonal; And / or, 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; And / or, the central axis of the second magnetic attraction portion coincides with the central axis of the sound-generating device; And / or, the second magnetic attraction portion is arranged to face the first magnetic attraction portion; And / or, a mounting groove is provided on a side of the support member facing the diaphragm assembly, and the second magnetic attraction portion is provided in the mounting groove.

15. An electronic device, characterized in that: The electronic device includes the sound emitting device according to any one of claims 1 to 14.

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