Sound production device and electronic equipment

Abstract

The utility model discloses a sounding device and electronic equipment, the sounding device comprises a magnetic circuit system, a vibration system and a support member, the magnetic circuit system comprises a magnetic conduction yoke and a central magnetic part and an edge magnetic part arranged on the magnetic conduction yoke, the central magnetic part and the edge magnetic part are arranged at intervals to form a magnetic gap, the vibration system is arranged at one side of the magnetic circuit system, and the support member is arranged at the other side of the magnetic circuit system. The vibration system comprises a diaphragm assembly and a voice coil, one end of the voice coil is connected with the diaphragm assembly, the end, away from the diaphragm assembly, of the voice coil corresponds to the magnetic gap, and at least one part of the supporting piece is located on the side, back to the magnetic circuit system, of the diaphragm assembly; wherein the vibrating diaphragm assembly is provided with a first magnetic attraction part, the supporting piece is provided with a second magnetic attraction part, a first attraction force exists between the first magnetic attraction part and the second magnetic attraction part, and a second attraction force exists between the first magnetic attraction part and the magnetic circuit system. According to the utility model, the first magnetic part and the second magnetic part are arranged, and static magnetic force is introduced into the vibration system to reduce the rigidity of the vibration system, so that the low-frequency effect of the sound production device is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transduction technology, and in particular to a sound-generating device and an electronic device using the sound-generating device. Background Technology

[0002] In recent years, consumer electronics have experienced rapid development, with smartphones, VR devices, and other electronic equipment gaining consumer acceptance and widespread application. Those skilled in the art have also made corresponding improvements to related supporting products, such as headphones, to meet the performance requirements of electronic products and satisfy consumers' needs for product performance.

[0003] Sound-generating devices are crucial electroacoustic transducers in consumer electronics, widely used as speakers, earpieces, and headphones. As electronic product performance improves, the acoustic performance of sound-generating devices inevitably follows. Loudness (sensitivity) is a key performance indicator for sound-generating devices. Theoretically, the low-frequency loudness of a sound-generating device is closely related to the maximum amount of air its diaphragm assembly can drive.

[0004] In related technologies, as the requirements for thinner and lighter electronic devices become increasingly stringent, the assembly space for miniature sound-generating devices within these devices is shrinking. To meet acoustic performance requirements, a larger vibration space is needed to accommodate large amplitude demands. However, the driving force factor BL of the product decreases as the displacement of the vibration system increases, thus limiting the product's performance and preventing a significant improvement in its low-frequency performance. Utility Model Content

[0005] The main purpose of this utility model is to provide a sound-generating device and 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, thereby reducing the stiffness of the vibration system through static magnetic force, and thus significantly improving the low-frequency effect of the sound-generating device.

[0006] To achieve the above objectives, this utility model proposes a sound-generating device, which includes:

[0007] A magnetic circuit system, the magnetic circuit system including a magnetic yoke and a central magnetic part and a side magnetic part disposed on the magnetic yoke, the central magnetic part and the side magnetic part being spaced apart to form a magnetic gap;

[0008] A vibration system, disposed on one side of the magnetic circuit system, includes a diaphragm assembly and a voice coil, one end of the voice coil being connected to the diaphragm assembly, and the end of the voice coil away from the diaphragm assembly being correspondingly disposed with respect to the magnetic gap; and

[0009] A support member, at least a portion of which is located on the side of the diaphragm assembly facing away from the magnetic circuit system;

[0010] The diaphragm assembly is provided with a first magnetic attraction part, and the support member is provided with a second magnetic attraction part. There is a first attraction between the first magnetic attraction part and the second magnetic attraction part, and there is a second attraction between the first magnetic attraction part and the magnetic circuit system. In the non-working state, the vibration system is located at the equilibrium position between the second magnetic attraction part and the magnetic circuit system under the combined force of the first attraction part and the second attraction part.

[0011] In one embodiment, the sound-generating device further includes a front cover, which is disposed 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. The second magnetic attraction part is disposed on the front cover.

[0012] In one embodiment, the sound-generating 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 enclosing an installation space, the magnetic circuit system and the vibration system being disposed within the installation space, the module upper shell being located on the side of the diaphragm assembly facing away from the magnetic circuit system, the module upper shell being formed as the support member, and the second magnetic attraction part being disposed on the module upper shell.

[0013] In one embodiment, the diaphragm assembly includes a diaphragm and a vibrating plate disposed on the diaphragm, wherein the first magnetic attraction portion is disposed on the vibrating plate.

[0014] In one embodiment, the first magnetic attraction part is bonded to the vibrating plate; or, the first magnetic attraction part and the vibrating plate are integrally injection molded.

[0015] And / or, the first magnetic attraction part is provided on the side of the vibrating plate facing the support member;

[0016] And / or, the first magnetic attraction part is provided on the side of the vibrating plate facing the central magnet;

[0017] And / or, the vibrating plate is provided with a fixed cavity, and the first magnetic suction part is provided in the fixed cavity.

[0018] In one embodiment, the first magnetic attraction part includes a plurality of first magnetic attraction parts; the plurality of first magnetic attraction parts are disposed on the same side or different sides of the vibrating plate; and / or, the plurality of first magnetic attraction parts are spliced ​​together or spaced apart.

[0019] And / or, the first magnetic attraction part is circular, elliptical or polygonal;

[0020] And / or, the central axis of the first magnetic attraction part coincides with the central axis of the sound-generating device;

[0021] And / or, the first magnetic attraction part is a magnetic plate, and the material of the magnetic plate is SPCC or SUS430;

[0022] And / or, the vibrating plate is made of a magnetic sheet to form the first magnetic attraction part.

[0023] In one embodiment, the first magnetic attraction part is a magnetic material coating disposed on the vibrating plate.

[0024] In one embodiment, the magnetic material coating includes a coating layer and a 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 iron silicon aluminum powder.

[0025] And / or, the magnetic material coating is disposed on the side of the vibrating plate facing the support member;

[0026] And / or, the magnetic material coating is disposed on the side of the vibrating plate facing the central magnet.

[0027] In one embodiment, the magnetic material coating comprises multiple layers; the multiple magnetic material coatings are disposed on the same side or different sides of the vibrating plate; and / or, the multiple magnetic material coatings are arranged in a spliced ​​or spaced manner.

[0028] And / or, the magnetic material coating is circular, elliptical, or polygonal;

[0029] And / or, the central axis of the magnetic material coating coincides with the central axis of the sound-generating device;

[0030] And / or, the vibrating plate has a first surface and a second surface 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.

[0031] In one embodiment, the central magnetic part includes a central magnet and a central magnetic plate stacked together, the central magnet is connected to the magnetic yoke, and the central magnetic plate has a recessed area corresponding to the first magnetic attraction part;

[0032] In this configuration, a portion of the central magnetic plate is recessed in a direction away from the diaphragm assembly to form the recessed region; or, the recessed region is a through-hole structure that penetrates the central magnetic plate.

[0033] In one embodiment, the diaphragm has an inner ring hole, the vibrating plate covers the inner ring hole, the vibrating plate has a recessed portion, the recessed portion is formed by the side of the vibrating plate opposite to the central magnetic portion and recessed towards the central magnetic portion, and the first magnetic attraction portion is disposed in the recessed portion.

[0034] In one embodiment, the recessed area is a through hole, and the central magnet has a protrusion corresponding to the through hole. The protrusion is located inside the through hole, and the end face of the protrusion facing the diaphragm does not exceed the end face of the central magnetic plate facing the diaphragm.

[0035] In one embodiment, the second magnetic part is bonded to the support member; or, the second magnetic part and the support member are integrally injection molded.

[0036] And / or, the second magnetic attraction part is provided on the side of the support member facing the diaphragm assembly;

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

[0038] And / or, the support member has a mounting cavity, and the second magnetic suction part is disposed in the mounting cavity.

[0039] In one embodiment, the second magnetic attraction part includes a plurality of second magnetic attraction parts; the plurality of second magnetic attraction parts are disposed on the same side or different sides of the support member; and / or, the plurality of second magnetic attraction parts are spliced ​​together or spaced apart;

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

[0041] And / or, the second magnetic attraction part is a magnet, the first magnetic attraction part and the central magnetic part have a second attraction force, and the magnetization direction of the second magnetic attraction part is opposite to the magnetization direction of the central magnetic part;

[0042] And / or, the central axis of the second magnetic attraction part coincides with the central axis of the sound-generating device;

[0043] And / or, the second magnetic attraction part is positioned directly opposite the first magnetic attraction part;

[0044] And / or, the support member has a mounting groove on the side facing the diaphragm assembly, and the second magnetic suction part is disposed in the mounting groove.

[0045] This utility model also proposes an electronic device, which includes the sound-generating device described above.

[0046] The sound-generating device of this utility model has a support member, at least a part of which is located on the side of the diaphragm assembly facing away from the magnetic circuit system. A first magnetic attraction part is provided on the diaphragm assembly, and a second magnetic attraction part is provided on the support member. The first magnetic attraction part and the second magnetic attraction part have a first attraction force, and the first magnetic attraction part has a second attraction force with the magnetic circuit system. In this way, the first magnetic attraction part interacts with the second magnetic attraction part of the support member and the magnetic circuit system respectively, that is, static magnetic force is introduced into the vibration system. This effectively reduces the strain recovery force of the diaphragm assembly during the movement. The static magnetic force reduces the stiffness of the vibration system, making the compliance of the diaphragm assembly better, thereby significantly improving the low-frequency effect of the sound-generating device. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the sound-generating device in the first embodiment of the present invention;

[0049] Figure 2 This is a structural schematic diagram of the sound-generating device from another perspective in the first embodiment of this utility model;

[0050] Figure 3 This is an exploded view of the sound-generating device in the first embodiment of the present invention;

[0051] Figure 4 This is a cross-sectional schematic diagram of the sound-generating device in the first embodiment of this utility model;

[0052] Figure 5 This is a cross-sectional schematic diagram of the sound-generating device in the second embodiment of this utility model;

[0053] Figure 6 This is a schematic diagram of the sound-generating device in the third embodiment of the present invention;

[0054] Figure 7 This is a structural schematic diagram of the sound-generating device from another perspective in the third embodiment of this utility model;

[0055] Figure 8 This is an exploded view of the sound-generating device in the third embodiment of the present invention;

[0056] Figure 9 This is a cross-sectional schematic diagram of the sound-generating device in the third embodiment of this utility model;

[0057] Figure 10 This is a cross-sectional schematic diagram of the sound-generating device in the fourth embodiment of this utility model;

[0058] Figure 11 This is a partial cross-sectional schematic diagram of the sound-generating device in one embodiment of the present invention;

[0059] Figure 12 This is a partial cross-sectional schematic diagram of the sound-generating device in another embodiment of the present invention;

[0060] Figure 13 This is a partial cross-sectional schematic diagram of the sound-generating device in another embodiment of the present invention;

[0061] Figure 14 This is a cross-sectional schematic diagram of the connection between the vibrating plate and the first magnetic suction part in the first embodiment of this utility model;

[0062] Figure 15 This is a cross-sectional schematic diagram of the connection between the vibrating plate and the first magnetic suction part in the second embodiment of this utility model;

[0063] Figure 16 This is a cross-sectional schematic diagram of the connection between the vibrating plate and the first magnetic suction part in the third embodiment of this utility model;

[0064] Figure 17 This is a cross-sectional schematic diagram of the connection between the vibrating plate and the first magnetic suction part in the fourth embodiment of this utility model;

[0065] Figure 18 This is a cross-sectional schematic diagram of the magnetic material coating in one embodiment of the present invention;

[0066] Figure 19 This is a schematic diagram of the structure of the vibrating plate in one embodiment of the present invention;

[0067] Figure 20 This is a schematic diagram of the structure of the vibrating plate at another time in one embodiment of the present invention;

[0068] Figure 21 This is a static magnetic force curve of the vibration direction of the sound-generating device in one embodiment of the present invention;

[0069] Figure 22 The stiffness curves of the sound-generating device of this utility model and existing designs are shown.

[0070] Figure 23 The diagram shows the frequency response performance of the sound-generating device of this utility model compared to existing designs.

[0071] Explanation of icon numbers:

[0072]

[0073]

[0074] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0075] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0076] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0077] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0078] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0079] This utility model proposes a sound-generating device 100. It is understood that the sound-generating device 100 can be applied to electronic devices, such as smartwatches, mobile phones, speakers, computers, headphones, or televisions, etc., and is not limited thereto.

[0080] It should be noted that loudness (sensitivity) is a key performance indicator of the sound-generating device 100. Theoretically, the low-frequency loudness of the sound-generating device 100 is closely related to the maximum amount of air that its diaphragm assembly 31 can drive. However, the volume available for the sound-generating device 100 in smart devices is becoming increasingly smaller, resulting in a smaller effective vibration area (Sd) and rear cavity volume. Therefore, a larger vibration space is needed to accommodate large amplitude (X). maxHowever, the driving force factor BL of the product decreases as the displacement of the vibration system 3 increases. This means that although a large vibration space is reserved, in actual low-frequency operation, even if the PA outputs a full-amplitude driving signal, the displacement of the vibration system 3 still cannot reach X. max This greatly limits the product's performance.

[0081] Considering that Sd is limited under given physical space constraints, the improvement of BL value is also limited under certain physical space and manufacturing level limitations. Therefore, this invention achieves a significant boost in low frequencies by adjusting the system stiffness (Kms) in the sound-generating device 100. In this invention, a new magnetic circuit design introduces static magnetic force into the vibration system 3, thereby reducing the stiffness of the vibration system 3 and achieving a significant boost in low frequencies.

[0082] Please refer to the reference. Figures 1 to 20 As shown in this 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 part 22 and a side magnetic part 23 disposed on the magnetic yoke 21. The central magnetic part 22 and the side magnetic part 23 are spaced apart to form a magnetic gap 24. The vibration system 3 is disposed on one side of the magnetic circuit system 2. The vibration system 3 includes a diaphragm assembly 31 and a voice coil 32. One end of the voice coil 32 is connected to the diaphragm assembly 31, and the end of the voice coil 32 away from the diaphragm assembly 31 is connected to the magnetic yoke 4. The gap 24 is correspondingly set, and at least a part 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 part 34, and the support member 4 is provided with a second magnetic attraction part 41. There is a first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41, and there is a second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2. In the non-working state, the vibration system 3 is located in the equilibrium position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the action of the resultant force of the first attraction and the second attraction.

[0083] In this embodiment, the sound-generating device 100 can be a single unit of a loudspeaker, and the loudspeaker can be a miniature loudspeaker. Of course, the sound-generating device 100 can also be a loudspeaker module, that is, a sound-generating module structure, which is not limited here.

[0084] It should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged opposite to each other. Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 may include a central magnetic part 22 and a side magnetic part 23, both of which are square in structure. The vibration system 3 is also arranged in a square shape. It is understood that the periphery of the diaphragm assembly 31 of the vibration system 3 may be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 may be respectively mounted on the outer shell or the module housing, etc., which are not limited here.

[0085] To better assemble the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100, in one embodiment, as... Figures 3 to 5 , Figures 8 to 13 As shown, the sound-generating device 100 also includes a housing 1, a magnetic circuit system 2 connected to one end of the housing 1, and a vibration system 3 connected to the other end of the housing 1 and disposed 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 disposed opposite to the magnetic circuit system 2.

[0086] In this embodiment, the outer shell 1 is used to install, fix, and support components such as the magnetic circuit system 2 and the vibration system 3; that is, the outer shell 1 provides a mounting base for components such as the magnetic circuit system 2 and the vibration system 3. It is understood that the outer shell 1 can be a single integral structure or formed by the cooperation of multiple separate structures; no limitation is made here. In this embodiment, the outer shell 1 can be a square frame or a frame structure, that is, the outer shell 1 has a cavity with openings at both ends. The magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the outer shell 1 and are arranged opposite to each other, so that the magnetic circuit system 2, the outer shell 1, and the diaphragm assembly 31 of the vibration system 3 enclose and form a vibration cavity.

[0087] Understandably, the sound-generating device 100 is used in electronic devices, meaning that 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 separate housing or enclosure structure from the electronic device. In this case, the housing 1 integrates the magnetic circuit system 2 and vibration system 3 of the sound-generating device 100 into a single structure, facilitating assembly and disassembly. Alternatively, the housing 1 of the sound-generating device 100 can be integrally molded with the housing or enclosure structure of the electronic device, which effectively improves structural strength and sealing performance.

[0088] In this embodiment, the outer shell 1 is used to house structures such as the fixed vibration system 3 and the magnetic circuit system 2, so that the sound-generating device 100 can be used as an independent component in an electronic device or a sound-generating module, which is not limited here. Of course, in other embodiments, the sound-generating device 100 can also be a module structure, in which case the vibration system 3 and the magnetic circuit system 2 of the sound-generating unit are installed as multiple independent components on the outer shell 1 of the module structure, which is not limited here.

[0089] Understandably, by setting the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 disposed on the magnetic yoke 21, the magnetic circuit system 2 can be connected to the outer shell 1 through the periphery of the magnetic yoke 21; or, the magnetic circuit system 2 can be connected to the outer shell 1 through the side magnetic portion 23, which is not limited here. In this embodiment, the side magnetic portion 23 is located outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22, so that the diaphragm assembly 31 of the vibration system 3 is connected to the end of the outer shell 1 away from the magnetic yoke 21 and is opposite to and spaced from the magnetic circuit system 2, thereby connecting one end of the voice coil 32 to the diaphragm assembly 31, and the other end of the voice coil 32 is correspondingly disposed with respect to the magnetic gap 24.

[0090] Understandably, the voice coil 32 can be a flat voice coil, which is fixed to the side of the diaphragm assembly 31 facing the magnetic circuit system 2 and is opposite to and spaced apart 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. Along the vibration direction of the vibration system 3, the other end of the voice coil 32 is opposite to the magnetic gap 24. Alternatively, the voice coil 32 can be a ring-shaped racetrack 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. This is not limited here.

[0091] To achieve electrical connection between the voice coil 32 and the external circuit, in one embodiment, as follows: Figures 3 to 5 , Figures 8 to 13 As shown, the vibration system 3 also 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 outer casing 1.

[0092] Understandably, the two ends of the centering support 33 are electrically connected to the leads of the voice coil 32 and the external circuit, respectively. In this embodiment, the centering support 33 can be disposed at the bottom of the voice coil 32, or located at one of the four corners of the sound-generating device 100, or along the short or long axis of the sound-generating device 100. Of course, the centering support 33 can also be disposed at the top of the voice coil 32, or between the voice coil 32 and the diaphragm assembly 31; this is not limited here.

[0093] In this embodiment, by providing a first magnetic attraction part 34 in the diaphragm assembly 31 of the vibration system 3, and providing a support member 4 on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, and providing a second magnetic attraction part 41 on the support member 4, a first attraction force exists between the first magnetic attraction part 34 and the second magnetic attraction part 41, and a second attraction force exists between the first magnetic attraction part 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 at a balanced position between the second magnetic attraction part 41 and the magnetic circuit system 2 under the combined force of the first attraction force and the second attraction force.

[0094] Understandably, when the vibration system 3 is working, the resultant force of the first and second attraction forces is opposite in direction to the strain restoring force of the vibration system 3 and is less than the strain restoring force of the diaphragm assembly 31. When the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first and second attraction forces is not greater than the stiffness of the vibration system 3. Under the action of the resultant force of the first and second attraction forces, the vibration system 3 is located in an equilibrium position between the second magnetic attraction part 41 and the magnetic circuit system 2. In this way, by introducing static magnetic force into the vibration system 3, the stiffness of the vibration system 3 is reduced, thereby achieving a significant improvement in low frequencies.

[0095] It should be noted that the first magnetic attraction part 34 is further provided with a second magnetic attraction part 41 and a magnetic circuit system 2 on both sides of the diaphragm assembly 31 in the vibration direction for attracting the first magnetic attraction part 34. That is, the second magnetic attraction part 41 and the magnetic circuit system 2 are respectively located on both sides of the first magnetic attraction part 34, so that when the first magnetic attraction part 34 vibrates with the vibration system 3, the first magnetic attraction part 34 can move closer to the second magnetic attraction part 41 or closer to the magnetic circuit system 2. Optionally, the second magnetic attraction part 41 and the magnetic circuit system 2 can be provided by magnets. In this embodiment, the magnetization direction of the second magnetic attraction part 41 is opposite to the magnetization direction of the central magnetic part 22 of the magnetic circuit system 2.

[0096] When the first magnetic attraction part 34 approaches the second magnetic attraction part 41, it moves away from the magnetic circuit system 2. Therefore, the attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 increases, while its attraction with the magnetic circuit system 2 decreases. The resultant force of the first and second attraction forces moves towards the second magnetic attraction part 41. The total attraction force on the first magnetic attraction part 34 can then be used as a force applied to the vibration system 3.

[0097] Based on the same principle, when the first magnetic attraction part 34 approaches the magnetic circuit system 2, it moves away from the second magnetic attraction part 41. Therefore, the attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 decreases, while its attraction with the magnetic circuit system 2 increases. The resultant force of the first and second attraction forces moves towards the magnetic circuit system 2. The total attraction force on the first magnetic attraction part 34 can then be used as the force applied to the vibration system 3.

[0098] Optionally, when the vibration system 3 is in the equilibrium position, the attraction force of the first magnetic attraction part 34 on the second magnetic attraction part 41 is equal to the attraction force on the first magnetic attraction part 34 on the magnetic circuit system 2. This is to prevent the attraction force on the first magnetic attraction part 34 from affecting the equilibrium position of the vibration system 3.

[0099] Specifically, taking the vibration system 3 vibrating in the vertical direction as an example, when the vibration system 3 is not working, the diaphragm assembly 31 is in the initial position. When the vibration system 3 is working, the voice coil 32 drives the diaphragm assembly 31 to vibrate vertically. When the diaphragm assembly 31 is above the initial position, the strain restoring force of the diaphragm 311 is downward. At this time, the first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 is upward, and the second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2 is downward. The first attraction is greater than the second attraction, and the resultant force of the first attraction and the second attraction is less than the strain restoring force of the diaphragm 311 and is upward. Thus, the resultant force of the first attraction and the second attraction acts on the diaphragm 311 to offset part of the strain restoring force of the diaphragm 311. Similarly, when the diaphragm assembly 31 is below the initial position, the strain restoring force of the diaphragm 311 is directed upward. At this time, the first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 is directed upward, and the second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2 is directed downward. The second attraction is greater than the first attraction, and the resultant force of the first attraction and the second attraction is less than the strain restoring force of the diaphragm 311 and is directed downward. Thus, the resultant force of the first attraction and the second attraction acts on the diaphragm 311 to offset part of the strain restoring force of the diaphragm.

[0100] In summary, when the vibration system 3 is working, the resultant force of the first and second suction forces is opposite in direction to the strain restoring force of the diaphragm 311 and is less than the strain restoring force of the diaphragm 311. When the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first and second suction forces is not greater than the stiffness of the diaphragm 311.

[0101] Specifically, when the sound-generating device 100 is in a non-operating state, the vibration system 3 is in a balanced position. The equivalent stiffness of the resultant force of the first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2 is not greater than the stiffness of the diaphragm 311. In other words, in the non-operating state, when the vibration system 3 is in a balanced position, the resultant force of the first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2 cannot drive the diaphragm assembly 31 to vibrate, thereby avoiding the influence of static magnetic force on the balanced position of the vibration system 3 when the sound-generating device 100 is in a non-operating state.

[0102] It should be noted that the force exerted on the vibration system 3 by the first magnetic attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41, and the second magnetic attraction between the first magnetic attraction part 34 and the magnetic circuit system 2, is not fixed. The greater the distance of the vibration system 3 from its equilibrium position, the greater the force exerted on the vibration system 3 by the first magnetic attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41, and the second magnetic attraction between the first magnetic attraction part 34 and the magnetic circuit system 2. Conversely, the smaller the distance of the vibration system 3 from its equilibrium position, the smaller the force exerted on the vibration system 3 by the first magnetic attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41, and the second magnetic attraction between the first magnetic attraction part 34 and the magnetic circuit system 2. The static magnetic force is as follows: Figure 21 As shown.

[0103] Specifically, the system stiffness Kms consists of two parts: the vibration system stiffness Km and the cavity stiffness Kb, i.e., Kms = Km + Kb. Considering that the static magnetic force is related to the position of the diaphragm assembly 31, similar to the system stiffness Kms, the stiffness generated by the static magnetic force is defined as Kt, Kt = static magnetic force / 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 stiffness, and Kb is the cavity stiffness. Then, as the displacement increases, the stiffness generated by the static magnetic force increases, and the system stiffness decreases. That is, the larger the amplitude, the "softer" the system, which "matches" the trend of the BL(x) curve, resulting in higher low-frequency performance, such as... Figure 22 and Figure 23 As shown.

[0104] The sound-generating device 100 of this utility model is provided with a support member 4, with at least a portion of the support member 4 located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2. This results in a first attraction between the first magnetic attraction part 34 and the second magnetic attraction part 41, and a second attraction between the first magnetic attraction part 34 and the magnetic circuit system 2. By utilizing the interaction between the first magnetic attraction part 34 and the second magnetic attraction part 41 and the magnetic circuit system 2 respectively, static magnetic force is introduced into the vibration system 3, thereby effectively reducing the strain recovery force of the diaphragm assembly 31 during the movement. The static magnetic force reduces the stiffness of the vibration system 3, making the compliance of the diaphragm assembly 31 better, thereby significantly improving the low-frequency effect of the sound-generating device 100.

[0105] Understandably, by setting the first magnetic attraction part 34 and the second magnetic attraction part 41, 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 and the second attraction is opposite to the strain restoring force of the diaphragm 311 and is less than the strain restoring force of the diaphragm 311; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first attraction and the second attraction is not greater than the stiffness of the diaphragm 311. By reducing the stiffness of the vibration system 3 through static magnetic force, the compliance of the diaphragm assembly 31 is improved, thereby significantly improving the low-frequency effect of the sound generating device 100.

[0106] In one embodiment, the sound-generating 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 forms a support member 4. The periphery of the front cover 43 is connected to the periphery of the diaphragm assembly 31 so that a vibration space 431 is formed between the front cover 43 and the diaphragm assembly 31. A second magnetic suction part 41 is disposed on the front cover 43.

[0107] In this embodiment, as Figures 6 to 10 As shown, the sound-generating device 100 can be installed in communication terminal devices such as mobile phones. The sound-generating device 100 can be selected as a sound-generating unit used as 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, that is, the front cover 43 is formed as 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 outer shell 1.

[0108] Understandably, the second magnetic suction part 41 is located on the front cover 43. To facilitate smooth sound generation by the sound-generating device 100, in this embodiment, the front cover 43 is also provided with a sound hole 432, which connects to the vibration space 431. Optionally, the sound hole 432 is positioned directly opposite the diaphragm assembly 31. To prevent dust, moisture, and other debris from affecting the sound generation of the diaphragm assembly 31 through the sound hole 432, the sound-generating device 100 also includes a mesh fabric 5, which covers the sound hole 432.

[0109] In this embodiment, there may be one or more sound holes 432. Optionally, there may be multiple sound holes 432, which are arranged around the second magnetic attraction part 41. It is understood that there may be one or more mesh fabrics 5. When there is one mesh fabric 5, the mesh fabric 5 covers all sound holes 432; when there are multiple mesh fabrics 5, one mesh fabric 5 covers at least one sound hole 432.

[0110] In order to connect the periphery of the front cover 43 with the diaphragm assembly 31, the position of the second magnetic part 41 on the front cover 43 is spaced apart from the diaphragm assembly 31. It is understood that the front cover 43 may optionally be in the shape of an inverted U, a pot lid, or a hat, etc., and is not limited here.

[0111] In one embodiment, the sound-generating device 100 further includes a module upper shell 44 and a module lower shell 45 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 disposed 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. The second magnetic attraction part 41 is disposed on the module upper shell 44.

[0112] In this embodiment, as Figures 1 to 5As shown, the sound-generating device 100 can be configured as a sound-generating module structure. The sound-generating device 100 also includes a module housing, which has an installation space 451. Optionally, the module housing includes an upper module housing 44 and a lower module housing 45, with the magnetic circuit system 2 and the vibration system 3 disposed within the installation space 451, such that the upper module housing 44 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, thus forming the upper module housing 44 as a support member 4. Optionally, a second magnetic attraction part 41 is disposed on the upper module housing 44.

[0113] Understandable, such as Figure 4 and Figure 5 As shown, the upper shell 44 of the module is provided with a support platform 441 surrounding the second magnetic suction part 41. The vibration system 3 is supported on the support platform 441 and forms a front acoustic cavity 46 with the upper shell 44 of the module. The diaphragm assembly 31 faces the front acoustic cavity 46. The magnetic circuit system 2 and the vibration system 3 are located in the installation space 451, so that the vibration system 3, the upper shell 44 of the module and the lower shell 45 of the module form a rear acoustic cavity 47. The magnetic circuit system 2 is located in the rear acoustic cavity 47.

[0114] To facilitate smooth sound generation by the sound-generating device 100, the module housing is also provided with a sound outlet 442 communicating with the front acoustic cavity 46. In this embodiment, the sound outlet 442 can be positioned directly opposite the diaphragm assembly 31, making the sound-generating device 100 have a frontal sound-generating structure. Of course, in other embodiments, the sound outlet 442 may not be positioned directly opposite the diaphragm assembly 31; optionally, the sound outlet 442 may be located on the side or periphery of the diaphragm assembly 31, in which case the sound-generating device 100 has a side-emitting structure.

[0115] In this embodiment, the module upper shell 44 is also provided with a sound guide, which forms a sound outlet channel. One end of the sound outlet channel is connected to the front sound cavity 46, and the other end of the sound outlet channel is connected to the sound outlet 442. It is understood that both ends of the support platform 441 are connected to the sound guide, so that the support platform 441 and the sound guide form a mounting groove or recess structure. To facilitate the installation and fixing of the vibration system 3, the support platform 441 can be a planar support platform structure, or it can be a stepped structure, so that the periphery of the vibration system 3 is supported and fixed to the stepped structure; no limitation is made here.

[0116] Understandably, in order to further improve the sound output effect of the sound-generating device 100, the rear acoustic cavity 47 of the sound-generating device 100 may be filled with sound-absorbing particles. In order 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 also includes an isolation and ventilation structure, which is disposed in the rear acoustic cavity 47 and blocks the sound-absorbing particles, but is not limited here.

[0117] It should be noted that the structure of the support member 4 is not limited to the structure of the front cover 43 and the module upper shell 44. It can also be other structural designs, as long as it can support and fix the second magnetic part 41. No limitation is made here.

[0118] It is understood that the support member 4 can be made of metal, plastic, or a combination of both; no limitation is made here. Optionally, the second magnetic part 41 is bonded to the support member 4. For example, the second magnetic part 41 can be bonded to the support member 4 using an adhesive layer. Of course, in other embodiments, the second magnetic part 41 can also be welded to the support member 4; for example, the second magnetic part 41 can be soldered to the support member 4; no limitation is made here.

[0119] To facilitate the processing of the support member 4 and improve the connection strength between the support member 4 and the second magnetic suction part 41, the second magnetic suction part 41 may optionally be integrally injection molded with the support member 4. In this embodiment, the second magnetic suction part 41 may optionally be made of a magnetically conductive material.

[0120] Optionally, the second magnetic attraction part 41 is a magnet. In this embodiment, there is a second attraction between the first magnetic attraction part 34 and the central magnetic part 22, and the magnetization direction of the second magnetic attraction part 41 is opposite to that of the central magnetic part 22. Optionally, the magnetization direction of the second magnetic attraction part 41 is opposite to that of the central magnet 221 in the central magnetic part 22. As a result, the magnetic field lines generated by the second magnetic attraction part 41 are opposite in direction to and repel the magnetic field lines generated by the central magnetic part 22. The two magnetic field lines pass laterally through the voice coil 32, thereby increasing the intensity of the magnetic field lines acting on the voice coil 32, increasing the BL value of the product, and thus improving the sound generation sensitivity of the sound generating device 100.

[0121] In one embodiment, the second magnetic attraction part 41 is provided on the side of the support member 4 facing the diaphragm assembly 31; and / or, the second magnetic attraction part 41 is provided on the side of the support member 4 facing away from the diaphragm assembly 31; and / or, the support member 4 has a mounting cavity, and the second magnetic attraction part 41 is provided in the mounting cavity.

[0122] Understandably, the second magnetic attraction part 41 can be disposed on at least one side of the support member 4, that is, the second magnetic attraction part 41 can be disposed on one side of the support member 4 or on both opposite sides. In this embodiment, the support member 4 has an upper surface and a lower surface disposed opposite to each other, with the lower surface facing the diaphragm assembly 31. In this case, the second magnetic attraction part 41 can be disposed on the upper surface; the second magnetic attraction part 41 can also be disposed on the lower surface, such as... Figure 4 , Figure 5 , Figure 9 and Figure 10 As shown; the second magnetic suction part 41 can also be provided on both the upper and lower surfaces.

[0123] Of course, the second magnetic suction part 41 can also be disposed within the support member 4, that is, the second magnetic suction part 41 is embedded within the support member 4 or injection molded into the support member 4. In one embodiment, the support member 4 is provided with a mounting cavity, and the second magnetic suction part 41 is disposed within the mounting cavity.

[0124] In one embodiment, the second magnetic attraction portion 41 includes multiple portions. It is understood that multiple second magnetic attraction portions 41 may be simultaneously disposed on the same side of the support member 4; or, multiple second magnetic attraction portions 41 may be simultaneously disposed on different sides of the support member 4. For example, multiple second magnetic attraction portions 41 may be simultaneously disposed on the upper surface or the lower surface of the support member 4; or, multiple second magnetic attraction portions 41 may be simultaneously disposed on the upper surface and the lower surface of the support member 4, without limitation herein.

[0125] Understandably, when multiple second magnetic attracting parts 41 are disposed on the same side of the support member 4, the multiple second magnetic attracting parts 41 are spliced ​​together. For example, two adjacent second magnetic attracting parts 41 are tightly fitted together, that is, there is no gap. When multiple second magnetic attracting parts 41 are disposed on the same side of the support member 4, the multiple second magnetic attracting parts 41 are spaced apart. For example, there is a gap between two adjacent second magnetic attracting parts 41.

[0126] Optionally, the second magnetic attraction part 41 can be circular, elliptical, or polygonal. That is, the shape of the second magnetic attraction part 41 can be circular, elliptical, triangular, square, or other polygonal structures, and is not limited here. In order to ensure the magnetic attraction force between the second magnetic attraction part 41 and the first magnetic attraction part 34 is balanced, the structure of the second magnetic attraction part 41 can be a symmetrical structure or a regular structure, and is not limited here.

[0127] In this embodiment, the second magnetic attraction part 41 and the first magnetic attraction part 34 are optionally arranged facing each other. It can be understood that this arrangement can ensure the magnetic attraction between the second magnetic attraction part 41 and the first magnetic attraction part 34. In order to further ensure the balance of the vibration system 3 of the sound generating device 100, the central axis of the second magnetic attraction part 41 may coincide with the central axis of the sound generating device 100.

[0128] In one embodiment, such as Figure 5 and Figure 10 As shown, the support member 4 has a mounting groove 42 on the side facing the diaphragm assembly 31, and the second magnetic suction part 41 is located in the mounting groove 42.

[0129] In this embodiment, the mounting groove 42 can be a recessed structure formed by an indentation on one side surface of the support member 4, or it can be a recessed structure formed by one side surface of the support member 4 being recessed towards the other side surface, causing the other side surface to bulge. No limitation is made here. 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. No limitation is made here.

[0130] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibrating plate 312 disposed on the diaphragm 311, and a first magnetic attraction part 34 is disposed on the vibrating plate 312.

[0131] In this embodiment, as Figures 3 to 5 , Figures 8 to 13 As shown, the diaphragm 311 includes a folded ring portion, a fixing portion connected to the outside of the folded ring portion, and a central portion connected to the inside of the folded ring portion, with the vibrating plate 312 disposed in the central portion. It can be understood that the fixing portion, the folded ring portion, and the central portion of the diaphragm 311 are sequentially connected as an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 311. Optionally, the folded ring portion of the diaphragm 311 may have an upwardly convex bulge structure or a downwardly concave concave structure; this is not limited here.

[0132] Understandably, the vibrating plate 312, located at the center of the diaphragm 311, effectively strengthens the structural strength of the central portion of the diaphragm 311. By placing the first magnetic attraction part 34 on the vibrating plate 312, the interaction between the first magnetic attraction part 34 and the second magnetic attraction part 41 or the magnetic circuit system 2 generates static magnetic force, thereby changing the stiffness of the diaphragm 311. Optionally, the central portion of the diaphragm 311 can be a flat plate structure or a ring structure.

[0133] Optionally, a receiving groove is provided in the center of the diaphragm 311, and at least a portion of the diaphragm plate 312 is located within the receiving groove. It is understood that by providing the receiving groove on the side of the diaphragm 311 facing away from the voice coil 32, the diaphragm plate 312 can be conveniently installed and housed within the receiving groove, ensuring that the upper surface of the diaphragm plate 312 is flush with the upper surface of the diaphragm 311. This reduces the height of the sound-generating device 100 along the vibration direction of the vibration system 3 and ensures the vibration performance of the entire diaphragm assembly 31.

[0134] To reduce the weight of the diaphragm assembly 31, the diaphragm 311 has an inner ring hole 3111, and the diaphragm plate 312 covers the inner ring hole 3111. In this embodiment, the inner ring hole 3111 is located in the center of the diaphragm 311, and the periphery of the diaphragm plate 312 is connected to the center. The diaphragm 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.

[0135] Optionally, a stepped surface is formed on the periphery of the diaphragm 312, and the side of the diaphragm 311 adjacent to the inner ring hole 3111 is supported and connected to the stepped surface. The stepped surface is located between the voice coil 32 and the diaphragm 311. It can be understood that by providing a stepped surface on the periphery of the diaphragm 312, the stepped surface is recessed on the side facing the voice coil 32, thereby ensuring that when the central part of the diaphragm 311 overlaps and is supported on the stepped surface of the diaphragm 312, the upper surface of the central part of the diaphragm 311 is flush with the upper surface of the diaphragm 312, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 31.

[0136] In one embodiment, the first magnetic attraction part 34 may be a magnetic plate 341, which is made of SPCC or SUS430. Of course, the vibrating plate 312 may also be made of a magnetic sheet to form the first magnetic attraction part 34.

[0137] In one embodiment, the first magnetic attraction part 34 is bonded to the vibrating plate 312. For example, the first magnetic attraction part 34 can be connected to the vibrating plate 312 by adhesive. Alternatively, the first magnetic attraction part 34 can be soldered to the vibrating plate 312. For example, the first magnetic attraction part 34 can be connected to the vibrating plate 312 by soldering. Of course, in other embodiments, the first magnetic attraction part 34 and the vibrating plate 312 can also be integrally injection molded, that is, the first magnetic attraction part 34 and the vibrating plate 312 are processed into an integral structure by injection molding, which is not limited here.

[0138] In one embodiment, the first magnetic attraction part 34 is provided on the side of the vibrating plate 312 facing the support member 4; and / or, the first magnetic attraction part 34 is provided on the side of the vibrating plate 312 facing the central magnetic part 22; and / or, the vibrating plate 312 is provided with a fixing cavity, and the first magnetic attraction part 34 is provided in the fixing cavity.

[0139] Understandably, the first magnetic attraction part 34 can be disposed on at least one side of the vibrating plate 312, that is, the first magnetic attraction part 34 can be disposed on one side or on both opposite sides of the vibrating plate 312. In this embodiment, the vibrating 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. At this time, the first magnetic attraction part 34 can be disposed on the first surface 3121, such as... Figure 4 , Figure 5 , Figure 9 , Figures 10 to 12 , Figure 14 As shown; the first magnetic attraction part 34 can also be disposed on the second surface 3122, and the first magnetic attraction part 34 can also be disposed on both the first surface 3121 and the second surface 3122, such as Figure 13 , Figures 15 to 16 As shown.

[0140] Of course, the first magnetic attraction part 34 can also be disposed within the vibrating plate 312, that is, the first magnetic attraction part 34 is embedded within the vibrating plate 312 or injection molded into the vibrating plate 312. In one embodiment, the vibrating plate 312 is provided with a fixing cavity, and the first magnetic attraction part 34 is disposed within the fixing cavity.

[0141] In one embodiment, the first magnetic attraction portion 34 includes multiple portions. It is understood that multiple first magnetic attraction portions 34 may be simultaneously disposed on the same side of the vibrating plate 312; or, multiple first magnetic attraction portions 34 may be simultaneously disposed on different sides of the vibrating plate 312. For example, multiple first magnetic attraction portions 34 may be simultaneously disposed on the first surface 3121 or the second surface 3122 of the vibrating plate 312; or, multiple first magnetic attraction portions 34 may be simultaneously disposed on the first surface 3121 and the second surface 3122 of the vibrating plate 312, without limitation herein.

[0142] Understandably, when multiple first magnetic attracting parts 34 are disposed on the same side of the vibrating plate 312, the multiple first magnetic attracting parts 34 are spliced ​​together. For example, two adjacent first magnetic attracting parts 34 are tightly fitted together, that is, there is no gap. When multiple first magnetic attracting parts 34 are disposed on the same side of the vibrating plate 312, the multiple first magnetic attracting parts 34 are spaced apart. For example, there is a gap between two adjacent first magnetic attracting parts 34.

[0143] Optionally, the first magnetic attraction part 34 can be circular, elliptical, or polygonal. That is, the shape of the first magnetic attraction part 34 can be circular, elliptical, triangular, square, or other polygonal structures, and is not limited here. In order to ensure the magnetic attraction force between the second magnetic attraction part 41 and the first magnetic attraction part 34 is balanced, the structure of the first magnetic attraction part 34 can be a symmetrical structure or a regular structure, and is not limited here.

[0144] In this embodiment, the second magnetic attraction part 41 and the first magnetic attraction part 34 are optionally arranged facing each other. It can be understood that this arrangement can ensure the magnetic attraction between the second magnetic attraction part 41 and the first magnetic attraction part 34. In order to further ensure the balance of the vibration system 3 of the sound generating device 100, the central axis of the first magnetic attraction part 34 may coincide with the central axis of the sound generating device 100.

[0145] In another embodiment, the first magnetic attraction part 34 is a magnetic material coating 342 disposed on the vibrating plate 312.

[0146] In this embodiment, as Figure 18As shown, the first magnetic attraction part 34 can be a mixture of magnetically conductive material particles and adhesive, which is bonded to the vibrating plate 312. Of course, the first magnetic attraction part 34 can also be made of any soft magnetic material, such as pure iron, nickel, or alloys; it can also be made of a permanent magnet material that possesses its own magnetism, such as ferrite or noble metal alloys. It is important to note that when the first magnetic attraction part 34 uses a permanent magnet, it is necessary to ensure that the first magnetic attraction part 34 does not generate repulsive forces with the second magnetic attraction part 41 or the magnetic circuit system 2.

[0147] Understandably, the first magnetic attraction part 34 is disposed on the vibrating plate 312 and located between the second magnetic attraction part 41 and the magnetic circuit system 2, so that the first magnetic attraction part 34 can reciprocate between the second magnetic attraction part 41 and the magnetic circuit system 2 within the effective vibration range of the vibration system 3.

[0148] It should be noted that the first magnetic attraction part 34 is simultaneously attracted by the second magnetic attraction part 41 and the magnetic circuit system 2, and the directions of these two attractive forces are opposite. When the first magnetic attraction part 34 moves closer to the second magnetic attraction part 41 / magnetic circuit system 2, the attractive force between it and the second magnetic attraction part 41 / magnetic circuit system 2 increases, while the attractive force between it and the other magnetic circuit system 2 / second magnetic attraction part 41 decreases. The total attractive force on the first magnetic attraction part 34 is the force applied to the vibration system 3.

[0149] Optionally, the first magnetic attraction part 34 can be located at the center of the second magnetic attraction part 41 and the magnetic circuit system 2, or it can be located off-center from the center of the second magnetic attraction part 41 and the magnetic circuit system 2. This ensures that when the vibration system 3 is in the equilibrium position, the attraction force of the first magnetic attraction part 34 on the second magnetic attraction part 41 is equal to the attraction force on the first magnetic attraction part 34 on the magnetic circuit system 2. With this design, the size of the first magnetic attraction part 34 can be optimized to ensure that the first magnetic attraction part 34 can be mounted on the vibration plate 312. Of course, if necessary, the first magnetic attraction part 34 can be located within the vibration plate 312 to ensure that the total attraction force of the two magnetic regions on the first magnetic attraction part 34 is 0 when it is in the equilibrium position.

[0150] In one embodiment, such as Figure 18 As shown, the magnetic material coating 342 includes a coating layer 3421 and a 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 iron-silicon-aluminum powder, and is not limited herein.

[0151] In one embodiment, the magnetic material coating 342 is disposed on the side of the vibrating plate 312 facing the support member 4; and / or, the magnetic material coating 342 is disposed on the side of the vibrating plate 312 facing the central magnet 22; and / or, the vibrating plate 312 is provided with a fixing cavity, and the magnetic material coating 342 is disposed in the fixing cavity.

[0152] Understandably, the magnetic material coating 342 can be disposed on at least one side of the vibrating plate 312, that is, the magnetic material coating 342 can be disposed on one side or both opposite sides of the vibrating plate 312. In this embodiment, the vibrating plate 312 has a first surface 3121 and a second surface 3122 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, and at this time, the magnetic material coating 342 can be disposed on the first surface 3121, such as... Figure 14 As shown; the magnetic material coating 342 can also be disposed on the second surface 3122; the magnetic material coating 342 can also be disposed on both the first surface 3121 and the second surface 3122 simultaneously, such as Figure 13 , Figure 15 and Figure 16 As shown.

[0153] Of course, the magnetic material coating 342 can also be disposed within the vibrating plate 312, that is, the magnetic material coating 342 is embedded within the vibrating plate 312 or injection molded into the vibrating plate 312. In one embodiment, the vibrating plate 312 is provided with a fixing cavity, and the magnetic material coating 342 is disposed within the fixing cavity.

[0154] Optionally, such as Figures 13 to 15 As shown, the magnetic material coating 342 covers at least a portion of the first surface 3121. Optionally, as... Figure 13 and Figure 15 As shown, the magnetic material coating 342 covers at least a portion of the second surface 3122. Optionally, as... Figure 17 As shown, a 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... Figure 16 As shown, the magnetic material coating 342 covers the first surface 3121, the peripheral side surface 3123 and the second surface 3122, which is not limited here.

[0155] In one embodiment, the magnetic material coating 342 includes multiple layers. It is understood that multiple magnetic material coatings 342 may be simultaneously disposed on the same side of the vibrating plate 312; or, multiple magnetic material coatings 342 may be simultaneously disposed on different sides of the vibrating plate 312. For example, multiple magnetic material coatings 342 may be simultaneously disposed on the first surface 3121 or the second surface 3122 of the vibrating plate 312; or, multiple magnetic material coatings 342 may be simultaneously disposed on the first surface 3121 and the second surface 3122 of the vibrating plate 312, without limitation herein.

[0156] Understandably, when multiple magnetic material coatings 342 are disposed on the same side of the vibrating plate 312, the multiple magnetic material coatings 342 are arranged in a spliced ​​manner. For example, two adjacent magnetic material coatings 342 are tightly fitted together, i.e., there is no gap. When multiple magnetic material coatings 342 are disposed on the same side of the vibrating plate 312, the multiple magnetic material coatings 342 are arranged at intervals. For example, there is a gap between two adjacent magnetic material coatings 342.

[0157] Optionally, the magnetic material coating 342 can be circular, elliptical, or polygonal. That is, the shape of the magnetic material coating 342 can be circular, elliptical, triangular, square, or other polygonal structures, and is not limited here. In order to ensure the balance of magnetic attraction between the second magnetic attraction part 41 and the magnetic material coating 342, the structure of the magnetic material coating 342 can be a symmetrical structure or a regular structure, and is not limited here.

[0158] In this embodiment, the second magnetic attraction part 41 and the magnetic material coating 342 are optionally arranged facing each other. It can be understood that this arrangement can ensure the magnetic attraction between the second magnetic attraction part 41 and the magnetic material coating 342. In order to further ensure the balance of the vibration system 3 of the sound generating device 100, the central axis of the magnetic material coating 342 may optionally coincide with the central axis of the sound generating device 100.

[0159] In one embodiment, such as Figure 3 , Figure 8 , Figure 9 , Figures 11 to 13 , Figure 19 and Figure 20 As shown, the diaphragm 311 has an inner ring hole 3111, the vibrating plate 312 covers the inner ring hole 3111, the vibrating plate 312 has a recessed portion 3124, the recessed portion 3124 is formed by the side of the vibrating plate 312 facing away from the central magnetic part 22 and recessed towards the central magnetic part 22, and the first magnetic attraction part 34 is provided in the recessed portion 3124.

[0160] Understandably, the recessed portion 3124 can be a groove structure recessed into the vibrating plate 312. The recessed portion 3124 can be formed by the side of the vibrating plate 312 facing away from the central magnet 22 towards the central magnet 22; or, the recessed portion 3124 can be formed by the side of the vibrating plate 312 facing the central magnet 22 towards the support member 4, and there is no limitation here.

[0161] In one embodiment, the central magnetic part 22 includes a central magnet 221 and a central magnetic plate 222 stacked together. The central magnet 221 is connected to the magnetic yoke 21, and the central magnetic plate 222 has a recessed area 223 corresponding to the first magnetic attraction part 34.

[0162] In this embodiment, as Figures 3 to 5 , Figures 8 to 13 As shown, the central magnetic section 22 includes one or more central magnets 221 and a central magnetic guide plate 222, which are stacked. When multiple central magnets 221 and multiple central magnetic guide plates 222 are included, they are stacked alternately, and one central magnet 221 is connected to the magnetic yoke 21. When only one central magnet 221 and one central magnetic guide plate 222 are included, the central magnet 221 is sandwiched between the central magnetic guide plate 222 and the magnetic yoke 21.

[0163] Optionally, the central magnetic part 22 may be arranged in a ring structure, such that a through hole structure is formed in the center of the central magnetic part 22. Of course, in other embodiments, the central magnetic part 22 includes multiple strip structures, which are arranged to form a ring structure, such that the multiple strip structures are arranged to form a through hole structure, which is not limited here. Alternatively, the central magnetic part 22 may be a square plate structure, which is not limited here.

[0164] Understandably, the central magnetic plate 222 is integrally annularly arranged, forming a recessed region 223 in the center of the central magnetic plate 222. Of course, in other embodiments, there may be multiple central magnetic plates 222, which are annularly arranged to form the recessed region 223; or, the central magnetic plate 222 may have a plate-like structure, which is not limited here. Optionally, the central magnet 221 may be annularly arranged, that is, the central magnet 221 is integrally annularly arranged, forming a second through hole in the center of the central magnet 221. Of course, in other embodiments, there may be multiple central magnets 221, which are annularly arranged to form the second through hole; or, the central magnet 221 may have a plate-like structure, which is not limited here.

[0165] In this embodiment, by providing a recessed region 223 in the central magnetic plate 222 of the central magnetic part 22, the influence of the magnetic focusing effect of the central magnetic plate 222 on the second attraction force can be reduced, thereby effectively increasing the magnetic attraction force between the first magnetic attraction part 34 and the central magnet 221. It is understood that the recessed region 223 also helps to avoid the recessed part 3124 of the vibrating plate 312. Optionally, a portion of the central magnetic plate 222 is recessed in a direction away from the diaphragm assembly 31 to form the recessed region 223. Of course, in other embodiments, the recessed region 223 is a through-hole structure penetrating the central magnetic plate 222.

[0166] Understandably, the recessed area 223 can be a through hole or notch structure that penetrates the central magnetic plate 222. Of course, the recessed area 223 can also be a groove structure formed by the central magnetic plate 222 being recessed in the direction away from the diaphragm assembly 31, and this is not limited here.

[0167] 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 inside the through hole, and the end face of the protrusion 224 facing the diaphragm 311 does not exceed the end face of the central magnetic plate 222 facing the diaphragm 311.

[0168] In this embodiment, as Figure 10 and Figure 12 As shown, by providing a protrusion 224 on the central magnet 221, and positioning the protrusion 224 within the through hole, the magnetic attraction between the central magnet 221 and the first magnetic attraction part 34 can be effectively increased. It is understandable that, to prevent the protrusion 224 of the central magnet 221 from affecting the vibration of the recessed part 3124 of the vibrating plate 312 when the diaphragm 311 vibrates, optionally, the end face of the protrusion 224 facing the diaphragm 311 does not exceed the end face of the central magnetic plate 222 facing the diaphragm 311, thus effectively avoiding the recessed part 3124 of the vibrating plate 312. Optionally, the recessed area 223 is provided corresponding to the recessed part 3124, which is not limited here.

[0169] In one embodiment, the edge magnetic portion 23 includes an edge magnet and an edge magnetic plate disposed on the edge magnet. It can be understood that, as Figures 3 to 13 As shown, the side magnets and side magnetic plates of the side magnetic section 23 are stacked on the magnetic yoke 21, and the side magnets are connected to the magnetic yoke 21. The side magnets and side magnetic plates of the side magnetic section 23 are located outside the central magnetic section 22 and are spaced apart to form a magnetic gap 24.

[0170] In one embodiment, the edge magnetic portion 23 may optionally be arranged in a ring shape, in which case the ring-shaped edge magnetic portion 23 is located outside the central magnetic portion 22 and forms a magnetic gap 24 with the central magnetic portion 22 at a distance. Optionally, the edge magnet and / or the edge magnetic guide plate form a closed integral ring structure.

[0171] Of course, in other embodiments, the edge magnetic portion 23 includes multiple edge magnetic portions 23, which 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, there are multiple edge magnets and edge magnetic plates, which are arranged in a one-to-one correspondence, with adjacent edge magnets connected end to end to form a closed ring structure. Alternatively, the edge magnets form a closed integral ring structure, and there are multiple edge magnetic plates, with adjacent edge magnetic plates connected end to end to form a closed ring structure, and they are arranged corresponding to the ring-shaped edge magnets; or, the edge magnetic plates form a closed integral ring structure, and there are multiple edge magnets, with adjacent edge magnets connected end to end to form a closed ring structure, and they are arranged corresponding to the ring-shaped edge magnetic plates. No limitation is made here.

[0172] It should be noted that, in order to facilitate the installation of the centering support plate 33, multiple side magnetic parts 23 are arranged around the outside of the central magnetic part 22, and a notch is provided between two adjacent side magnetic parts 23 to avoid the centering support plate 33, which is not limited here.

[0173] In one embodiment, a positioning post is provided on the periphery of the side of the outer shell 1 facing away from the diaphragm assembly 31, and a positioning notch is provided on the magnetic yoke 21 corresponding to the positioning post, with the positioning post and the positioning notch engaging in positioning. It can be understood that by providing a positioning post on the outer shell 1 and forming a positioning notch on the magnetic yoke 21 to engage with the positioning post, the positioning and installation of the magnetic circuit system 2 can be achieved, thereby improving the convenience and accuracy of installation.

[0174] In this embodiment, as Figures 3 to 13 As shown, the side magnetic part 23 includes a side magnet and a side magnetic guiding plate stacked together. The side magnet is sandwiched between the side magnetic guiding plate and the magnetic guiding yoke 21. The side magnetic guiding plate is connected to the outer shell 1. Optionally, the side magnetic guiding plate and the outer shell 1 are integrally formed, which simplifies the structure and improves installation stability.

[0175] In one embodiment, the centering support 33 includes multiple centering supports 33, one end of each centering support 33 is connected to the voice coil 32 and electrically connected to the lead wire of the voice coil 32, and the other end of each centering support 33 is connected to the outer shell 1, thereby improving the operational stability of the vibration system 3.

[0176] Optionally, multiple centering supports 33 are distributed along the major axis and / or minor axis of the magnetic circuit system 2 and / or at diagonal or four-corner positions of the magnetic circuit system 2. It is understood that the multiple centering supports 33 may be symmetrically distributed along the major axis of the magnetic circuit system 2; the multiple centering supports 33 may also be symmetrically distributed along the minor axis of the magnetic circuit system 2; the multiple centering supports 33 may also be diagonally positioned in the magnetic circuit system 2; the multiple centering supports 33 may also be positioned at the four corners of the magnetic circuit system 2. Of course, in other embodiments, the multiple centering supports 33 may be distributed along the major axis of the magnetic circuit system 2, the minor axis of the magnetic circuit system 2, and at diagonal or four-corner positions of the magnetic circuit system 2, and this is not limited here.

[0177] Optionally, the centering support 33 may include two or four. This arrangement can both connect the voice coil 32 to the external circuit using the centering support 33 and ensure the vibration balance of the sound-generating device 100.

[0178] It is understandable that when there are two centering supports 33, the two centering supports 33 are arranged at intervals along the long axis of the magnetic circuit system 2; or, the two centering supports 33 are arranged at intervals 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 arranged correspondingly at the four corners of the magnetic circuit system 2. Regarding the arrangement of the centering supports 33, this utility model does not make specific limitations here.

[0179] In one embodiment, each centering support 33 includes a first connecting part, an elastic arm and a second connecting part connected in sequence. The first connecting part is connected to the voice coil 32 and electrically connected to the lead wire of the voice coil 32. The second connecting part is connected to the outer casing 1.

[0180] In this embodiment, as Figure 3 , Figure 8 As shown, the first connecting portion, elastic arm, and second connecting portion of the centering support 33 can be selected as an integrally formed structure. This effectively ensures the structural strength of the centering support 33 while simplifying the processing steps. Understandably, to ensure the deformation capability of the centering support 33, the elastic arm has at least one bend.

[0181] In one embodiment, such as Figure 3 and Figure 8 As shown, the first connecting portion, elastic arm, and second connecting portion of the centering support 33 can be located on the same plane. Of course, in other embodiments, the first connecting portion and the second connecting portion of the centering support 33 can also be located on different planes. It can be understood that the centering support 33 is used to connect the external circuit to the voice coil 32, and the centering support 33 can also effectively prevent the voice coil 32 from swaying or polarizing during vibration.

[0182] This utility model also proposes an electronic device, which includes the aforementioned sound-generating device 100. The specific structure of the sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0183] In one embodiment, the electronic device further includes a device housing and a flexible circuit board. The sound-generating device 100 is disposed inside 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 source.

[0184] Understandably, the flexible circuit board is used to connect and conduct external circuitry to the sound-generating device 100. The flexible circuit board has inner and outer pads; the inner pads of the flexible circuit board are connected and conduction-conducting with the sound-generating device 100, and the outer pads of the flexible circuit board are used to connect with external terminals.

[0185] 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 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 circuit board may also be entirely disposed within the cavity of the device housing, and this is not limited here.

[0186] Understandably, electronic devices can be headphones, mobile phones, computers, tablets, smart wearable devices, etc., and are not limited here. In an electronic device, the sound-generating device 100 can be assembled into the casing of the electronic device as a module or as a single unit. This electronic device can be a mobile phone, MP3 player, MP4 player, tablet, headphones, wearable device, etc., and will not be listed here individually.

[0187] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A sound producing device, characterized by, The sound generating device comprises: a magnetic circuit system comprising a magnetic yoke, a center magnetic part and a side magnetic part arranged at the center of the magnetic yoke, and the center magnetic part and the side magnetic part are arranged at intervals to form a magnetic gap; a vibration system arranged at 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 the other end of the voice coil being arranged corresponding to the magnetic gap; a support, at least a part of the support being located at the side of the diaphragm assembly away from the magnetic circuit system; wherein the diaphragm assembly is provided with a first magnetic attraction part, the support is provided with a second magnetic attraction part, the first magnetic attraction part and the second magnetic attraction part have a first attractive force therebetween, the first magnetic attraction part and the magnetic circuit system have a second attractive force therebetween, and in a non-working state, the vibration system is located at a balance position between the second magnetic attraction part and the magnetic circuit system under the action of the resultant force of the first attractive force and the second attractive force.

2. The sound production device of claim 1, wherein The sound generating device further comprises a front cover arranged at the side of the diaphragm assembly away from the magnetic circuit system and formed as the support, the periphery of the front cover being 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 at the front cover.

3. The sound production device of claim 1, wherein The sound generating device further comprises a module upper shell and a module lower shell connected to each other, the module upper shell and the module lower shell enclosing an installation space, the magnetic circuit system and the vibration system being arranged in the installation space, the module upper shell being located at the side of the diaphragm assembly away from the magnetic circuit system, the module upper shell being formed as the support, and the second magnetic attraction part being arranged at the module upper shell.

4. The sound production device of claim 1, wherein The diaphragm assembly comprises a diaphragm and a vibration plate arranged at the diaphragm, and the first magnetic attraction part is arranged at the vibration plate.

5. The sound production device of claim 4, wherein, The first magnetic attraction part is bonded to the vibration plate, or the first magnetic attraction part is integrally injection molded with the vibration plate; and / or, the first magnetic attraction part is arranged at the side of the vibration plate facing the support; and / or, the first magnetic attraction part is arranged at the side of the vibration plate facing the center magnetic part; and / or, a fixing cavity is arranged in the vibration plate, and the first magnetic attraction part is arranged in the fixing cavity.

6. The sound production device of claim 4, wherein, The first magnetic attraction part comprises a plurality of first magnetic attraction parts arranged at the same side or different sides of the vibration plate, and / or a plurality of first magnetic attraction parts are arranged in a splicing manner or at intervals; and / or, the first magnetic attraction part is circular, elliptical or polygonal; and / or, the central axis of the first magnetic attraction part coincides with the central axis of the sound generating device; and / or, the first magnetic attraction part is a magnetic plate, and the material of the magnetic plate is SPCC or SUS430; and / or, the vibration plate is made of a magnetic sheet to form the first magnetic attraction part.

7. The sound production device of claim 4, wherein The first magnetic attraction part is a magnetic material coating arranged at the vibration plate.

8. The sound production device of claim 7, wherein, The magnetic material coating comprises a coating layer and a magnetic powder 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 iron silicon aluminum powder; And / or, the magnetic material coating is arranged on the side of the vibrating plate facing the support; And / or, the magnetic material coating is arranged on the side of the vibrating plate facing the central magnetic part.

9. The sound production device of claim 7, wherein, The magnetic material coating comprises a plurality of; the plurality of magnetic material coatings are arranged on the same side or different sides of the vibrating plate; and / or, the plurality of magnetic material coatings are arranged in splicing or spacing; 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 production device; And / or, the vibrating plate has a first surface and a second surface arranged in opposite directions and a peripheral side surface connecting the first surface and the second surface; The magnetic material coating covers at least part of the first surface; and / or, the magnetic material coating covers at least part 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 production device of claim 4, wherein, The central magnetic part comprises a central magnet and a central magnetic conducting plate arranged in layers, the central magnet is connected to the magnetic conducting yoke, and the central magnetic conducting plate is provided with a recessed area corresponding to the first magnetic attracting part; Part of the central magnetic conducting plate is recessed to form the recessed area in a direction away from the diaphragm assembly; or, the recessed area is a through hole structure penetrating the central magnetic conducting plate.

11. The sound production device of claim 10, wherein, The diaphragm is provided with an inner ring hole, the vibrating plate cover is arranged in the inner ring hole, the vibrating plate is provided with a recessed part, the recessed part is recessed from the side of the vibrating plate away from the central magnetic part to the central magnetic part, and the first magnetic attracting part is arranged in the recessed part.

12. The sound production device of claim 10, wherein, The recessed area is a through hole, the central magnet is provided with a protruding part corresponding to the through hole, the protruding part is located in the through hole, and the side end face of the protruding part facing the diaphragm does not exceed the side end face of the central magnetic conducting plate facing the diaphragm.

13. The sound production device of any one of claims 1 to 12, wherein, The second magnetic attracting part is bonded to the support; or, the second magnetic attracting part is integrally injection molded with the support; And / or, the second magnetic attracting part is arranged on the side of the support facing the diaphragm assembly; And / or, the second magnetic attracting part is arranged on the side of the support away from the diaphragm assembly; And / or, the support is provided with a mounting cavity, and the second magnetic attracting part is arranged in the mounting cavity.

14. The sound production device of claim 1, wherein, The second magnetic attracting part comprises a plurality of; the plurality of second magnetic attracting parts are arranged on the same side or different sides of the support; and / or, the plurality of second magnetic attracting parts are arranged in splicing or spacing; And / or, the second magnetic attracting part is circular, elliptical or polygonal; And / or, the second magnetic attraction part is a magnet, the first magnetic attraction part and the center magnetic part have the second magnetic attraction, the magnetization direction of the second magnetic attraction part is opposite to the magnetization direction of the center magnetic part; And / or, the center axis of the second magnetic attraction part coincides with the center axis of the sound production device; And / or, the second magnetic attraction part is opposite to the first magnetic attraction part; And / or, the side of the support facing the diaphragm assembly is provided with a mounting groove, and the second magnetic attraction part is arranged in the mounting groove.

15. An electronic device, comprising: The electronic device comprises the sound production device according to any one of claims 1 to 14.

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