Sound production module and electronic device

Abstract

Disclosed in the present invention are a sound production module and an electronic device. The sound production module comprises a module housing and a sound production unit, a vibration plate of a diaphragm assembly of the sound production unit is provided with a magnetic conduction part, an upper shell of the module housing is located on the side of the diaphragm assembly facing away from a magnetic circuit system, an auxiliary magnet is arranged on the upper shell, the magnetization direction of the auxiliary magnet is opposite to that of a central magnetic part, wherein there is a first magnetic attraction between the magnetic conduction part and the auxiliary magnet, and there is a second magnetic attraction between the magnetic conduction part and the magnetic circuit system, and in a non-working state, a vibration system is located at a balance position between the auxiliary magnet and the magnetic circuit system under the combined effect of the first magnetic attraction and the second magnetic attraction. According to the present invention, the magnetic conduction part and the auxiliary magnet are provided to introduce a static magnetic force into the vibration system, so as to reduce the stiffness of the vibration system, thereby greatly improving the low-frequency effect of the sound production module.

Description

Sound modules and electronic devices Technical Field

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

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

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

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

[0005] The main purpose of the present invention is to provide a sound module and an electronic device, which aims to introduce static magnetotropy into the vibration system by setting a magnetic conductive part and an auxiliary magnet, and reduce the stiffness of the vibration system by static magnetotropy, thereby significantly improving the low-frequency effect of the sound module.

[0006] To achieve the above objectives, the present invention provides a sound module, comprising:

[0007] A module housing, wherein an installation space is provided in the module housing, and the module housing comprises a connected module upper shell and a module lower shell; and

[0008] A sound-emitting unit, the sound-emitting unit including a magnetic circuit system and a vibration system arranged in the installation space, the magnetic circuit system including a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the central magnetic portion and the side magnetic portion being spaced apart to form a magnetic gap, the vibration system being arranged on one side of the magnetic circuit system, the vibration system including a diaphragm assembly and a voice coil connected to the diaphragm assembly, the end of the voice coil away from the diaphragm assembly being arranged corresponding to the magnetic gap, the diaphragm assembly including a diaphragm and a vibration plate arranged on the diaphragm, the vibration plate having a magnetic conductive portion, 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 provided with an auxiliary magnet, the magnetization direction of the auxiliary magnet being opposite to the magnetization direction of the central magnetic portion;

[0009] There is a first attraction between the magnetic conductive part and the auxiliary magnet, and a second attraction between the magnetic conductive part and the magnetic circuit system. When in a non-working state, the vibration system is located in a balanced position between the auxiliary magnet and the magnetic circuit system under the action of the combined force of the first attraction and the second attraction.

[0010] In one embodiment, the magnetic conductive portion is bonded to the vibration plate;

[0011] Alternatively, the magnetic conductive portion and the vibration plate are integrally injection-molded;

[0012] Alternatively, the vibration plate is made of a magnetic conductive material, and the vibration plate forms the magnetic conductive portion.

[0013] In one embodiment, the magnetic conductive portion is provided on a side of the vibration plate facing the upper shell of the module;

[0014] And / or, the magnetic conductive portion is provided on a side of the vibration plate facing the central magnetic portion;

[0015] And / or, the vibration plate is provided with a fixed cavity, and the magnetic conductive part is provided in the fixed cavity.

[0016] In one embodiment, the magnetic conductive portion includes a plurality of magnetic conductive portions; the plurality of magnetic conductive portions are arranged on the same side or different sides of the diaphragm assembly; and / or the plurality of magnetic conductive portions are arranged in a spliced ​​manner or in an interval manner;

[0017] And / or, the magnetic conductive portion is circular, elliptical or polygonal;

[0018] And / or, the central axis of the magnetic conductive portion coincides with the central axis of the sound module;

[0019] And / or, the magnetic conductive portion is a magnetic conductive plate, and the material of the magnetic conductive plate is SPCC or SUS430.

[0020] In one embodiment, the central magnetic portion includes a stacked central magnet and a central magnetic conductive plate. The central magnet is connected to the magnetic conductive yoke, and the central magnetic conductive plate is provided with a recessed area corresponding to the magnetic conductive portion.

[0021] In one embodiment, a portion of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly to form the recessed area;

[0022] Alternatively, the recessed area is a through-hole structure penetrating the central magnetic conductive plate.

[0023] In one embodiment, the recessed area is a through hole, the central magnet is provided with a protrusion corresponding to the through hole, and the protrusion is located in the through hole.

[0024] In one embodiment, the end surface of the protrusion facing the diaphragm does not exceed the end surface of the central magnetic conductive plate facing the diaphragm.

[0025] In one embodiment, the diaphragm is provided with an inner ring hole, the vibration plate cover is provided on the inner ring hole, the side of the vibration plate facing away from the central magnetic part is recessed toward the direction close to the central magnetic part to form a fixed groove, and the magnetic conductive part is provided in the fixed groove.

[0026] In one embodiment, the module upper shell cooperates with the sound-emitting monomer to form a front sound cavity, and the module shell is provided with a sound outlet hole communicating with the front sound cavity;

[0027] Wherein, the auxiliary magnet is arranged on the side of the module upper shell facing the front acoustic cavity; and / or, the auxiliary magnet is arranged on the side of the module upper shell facing away from the front acoustic cavity; and / or, the module upper shell is provided with an installation cavity, and the auxiliary magnet is arranged in the installation cavity.

[0028] In one embodiment, the auxiliary magnet is bonded to the upper shell of the module;

[0029] Alternatively, the auxiliary magnet and the module upper shell are integrally injection molded.

[0030] In one embodiment, the auxiliary magnets include a plurality of auxiliary magnets; the plurality of auxiliary magnets are arranged on the same side or different sides of the upper shell of the module; and / or the plurality of auxiliary magnets are arranged in a spliced ​​manner or in an interval manner;

[0031] And / or, the auxiliary magnet is circular, elliptical or polygonal;

[0032] And / or, the auxiliary magnet is a magnet;

[0033] And / or, the central axis of the auxiliary magnet coincides with the central axis of the sound-emitting unit;

[0034] And / or, the auxiliary magnet is arranged to face the magnetic conductive portion;

[0035] And / or, a mounting groove is provided on a side of the module upper shell facing the diaphragm assembly, and the auxiliary magnet is provided in the mounting groove.

[0036] In one embodiment, the module housing further includes a module middle shell, and the module middle shell, the module upper shell, and the module lower shell together define the installation space;

[0037] Along the vibration direction of the vibration system, the module middle shell is located between the module upper shell and the module lower shell, and two ends thereof are respectively connected to the module upper shell and the module lower shell.

[0038] The present invention also provides an electronic device, which includes the sound module described above.

[0039] The sound module of the technical solution of the present invention is configured so that the module shell is configured as a connected module upper shell and module lower shell, so that the module upper shell is located on the side of the diaphragm assembly of the sound unit facing away from the magnetic circuit system, and the diaphragm assembly is configured as a diaphragm and a vibration plate arranged on the diaphragm, and a magnetic conductive part is arranged on the vibration plate, and an auxiliary magnet is arranged on the module upper shell, so that the magnetization direction of the auxiliary magnet is opposite to the magnetization direction of the central magnetic part, so that there is a first attraction between the magnetic conductive part and the auxiliary magnet, and a second attraction between the magnetic conductive part and the magnetic circuit system. In this way, the magnetic conductive part interacts with the auxiliary magnet and the magnetic circuit system respectively, and a static magnetic force is introduced into the vibration system, thereby effectively reducing the strain recovery force of the diaphragm assembly during movement. It can be understood that by setting up the magnetic conductive part and the auxiliary magnet, a static magnetic force is introduced into the vibration system, so that when the vibration system is working, the combined force of the first suction force and the second suction force is opposite to the direction of the strain recovery force of the diaphragm and is smaller than the strain recovery force of the diaphragm; when the vibration system stops working, the vibration system is located in a balanced position between the auxiliary magnet and the magnetic circuit system under the action of the combined force of the first suction force and the second suction force, thereby reducing the stiffness of the vibration system through the static magnetic force, making the diaphragm assembly more compliant, thereby greatly improving the low-frequency effect of the sound module. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0041] FIG1 is a schematic structural diagram of a sound module according to an embodiment of the present invention;

[0042] FIG2 is a schematic structural diagram of a sound module from another perspective according to an embodiment of the present invention;

[0043] FIG3 is an exploded schematic diagram of a sound module according to an embodiment of the present invention;

[0044] FIG4 is a cross-sectional schematic diagram of a sound module according to an embodiment of the present invention;

[0045] FIG5 is a cross-sectional schematic diagram of a sound module according to another embodiment of the present invention;

[0046] FIG6 is a cross-sectional schematic diagram of a sound-emitting unit according to an embodiment of the present invention;

[0047] FIG7 is a cross-sectional schematic diagram of a sound-emitting unit in another embodiment of the present invention;

[0048] FIG8 is a magnetostatic force curve diagram of the vibration direction of the sound module in one embodiment of the present invention;

[0049] FIG9 is a stiffness curve diagram of the sound module of the present invention and the prior art design;

[0050] FIG10 is a frequency response performance test diagram of the sound module of the present invention and the existing design.

[0051] Description of Figure Numbers:

[0052] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0056] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0057] The present invention provides a sound module 500. It is understandable that the sound module 500 can be applied to electronic devices, and the electronic devices can be smart watches, mobile phones, speakers, computers, headphones or televisions, etc., which are not limited here.

[0058] It should be noted that loudness (sensitivity) is the main performance indicator of the sound module 500. In theory, the low-frequency loudness of the sound module 500 is closely related to the maximum amount of air that the diaphragm assembly 31 of its sound unit 100 can push. However, the volume left for the sound module 500 in smart devices is getting smaller and smaller, making the effective vibration area (Sd) and the back cavity volume of the sound module 500 smaller and smaller. Therefore, a larger vibration space needs to be reserved to meet the large amplitude (X max However, the driving force factor BL value of the product will decrease as the displacement of the vibration system 3 of the sound unit 100 increases. This results in that although a large vibration space is reserved, at actual low frequencies, even if the PA outputs the driving signal at full amplitude, the displacement of the vibration system 3 of the sound unit 100 still cannot reach X. max , which greatly limits the performance of the product.

[0059] 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 constraints. Therefore, the present invention adjusts the system stiffness (Kms) in the sound module 500 to achieve a significant improvement in low frequency. In the present invention, through a new magnetic circuit design, static magnetotropy is introduced into the vibration system 3 of the sound unit 100, and the static magnetotropy is used to reduce the stiffness of the vibration system 3, thereby achieving a significant improvement in low frequency.

[0060] Please refer to Figures 1 to 7. In an embodiment of the present invention, the sound module 500 includes a module shell 400 and a sound unit 100. The module shell 400 is provided with an installation space 421. The module shell 400 includes a module upper shell 410 and a module lower shell 420 connected to each other. The sound unit 100 includes a magnetic circuit system 2 and a vibration system 3 arranged in the installation space 421. The magnetic circuit system 2 includes a magnetic yoke 21 and a central magnetic portion 22 and a side magnetic portion 23 arranged on the magnetic yoke 21. The central magnetic portion 22 and the side magnetic portion 23 are spaced apart to form a magnetic gap 24. The vibration system 3 is arranged on one side of the magnetic circuit system 2. The vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31. The voice coil 32 is far away One end of the diaphragm assembly 31 is arranged corresponding to the magnetic gap 24, and the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312 arranged on the diaphragm 311, the vibration plate 312 has a magnetic conductive portion 3121, and the module upper shell 410 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2. The module upper shell 410 is provided with an auxiliary magnet 411, and the magnetization direction of the auxiliary magnet 411 is opposite to the magnetization direction of the central magnetic portion 22; wherein, there is a first suction force between the magnetic conductive portion 3121 and the auxiliary magnet 411, and there is a second suction force between the magnetic conductive portion 3121 and the magnetic circuit system 2. When in a non-working state, the vibration system 3 is located in a balanced position between the auxiliary magnet 411 and the magnetic circuit system 2 under the action of the combined force of the first suction force and the second suction force.

[0061] In this embodiment, the sound unit 100 of the sound module 500 can be a speaker unit, and the speaker can be a micro speaker. The sound module 500 can optionally have a modular structure, and the module housing 400 of the sound module 500 forms an installation space 421, and the sound unit 100 is disposed within the installation space 421 of the module housing 400. Optionally, the module housing 400 includes a module upper shell 410 and a module lower shell 420. The sound unit 100 is disposed within the installation space 421, such that at least a portion of the module upper shell 410 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2.

[0062] As will be appreciated, the acoustic unit 100 is disposed within the installation space 421, such that the acoustic unit 100 cooperates with the upper module shell 410 of the module housing 400 to form a front acoustic cavity 430, and the acoustic unit 100 cooperates with the upper module shell 410 and the lower module shell 420 of the module housing 400 to form a rear acoustic cavity 440. In this embodiment, as shown in Figures 4 and 5, the diaphragm assembly 31 of the acoustic unit 100 faces the front acoustic cavity 430, and the magnetic circuit system 2 is located within the rear acoustic cavity 440. Optionally, an auxiliary magnet 411 is disposed within the upper module shell 410.

[0063] In order to facilitate the sound module 500 to produce sound smoothly, in one embodiment, the module upper shell 410 cooperates with the sound unit 100 to form a front sound cavity 430, and the module shell 400 is provided with a sound hole 413 connected to the front sound cavity 430.

[0064] In this embodiment, the sound outlet hole 413 may be disposed directly opposite the diaphragm assembly 31, so that the sound module 500 has a front sound-emitting structure. Of course, in other embodiments, the sound outlet hole 413 may not be disposed directly opposite the diaphragm assembly 31. Alternatively, the sound outlet hole 413 may be located on the side or periphery of the diaphragm assembly 31, in which case the sound module 500 has a side sound-emitting structure.

[0065] It can be understood that, as shown in Figures 4 and 5, the module upper shell 410 is also provided with a sound guide, which forms a sound outlet channel, one end of which is connected to the front sound cavity 430, and the other end of the sound outlet channel is connected to the sound outlet hole 413.

[0066] In one embodiment, the module upper shell 410 is provided with a support platform 412 surrounding the auxiliary magnet 411, the sound unit 100 is supported on the support platform 412, and is enclosed with the module upper shell 410 to form a front sound cavity 430, the diaphragm assembly 31 faces the front sound cavity 430, the sound unit 100, the module upper shell 410 and the module lower shell 420 are enclosed to form a rear sound cavity 440, the magnetic circuit system 2 faces the rear sound cavity 440, and the module upper shell 410 is also provided with a sound outlet hole 413 connected to the front sound cavity 430.

[0067] In this embodiment, as shown in Figures 4 and 5, the module upper shell 410 is provided with a support platform 412 surrounding the auxiliary magnet 411. The vibration system 3 of the sound unit 100 is supported on the support platform 412 and encloses the module upper shell 410 to form a front acoustic cavity 430, with the diaphragm assembly 31 facing the front acoustic cavity 430. The magnetic circuit system 2 and vibration system 3 of the sound unit 100 are arranged in the installation space 421, so that the vibration system 3, the module upper shell 410, and the module lower shell 420 enclose a rear acoustic cavity 440, and the magnetic circuit system 2 is located in the rear acoustic cavity 440.

[0068] Optionally, both ends of the support platform 412 are connected to the sound guide, so that the support platform 412 and the sound guide enclose a mounting groove or groove structure. To facilitate the installation and fixation of the sound unit 100, the support platform 412 can be a flat support platform structure. The support platform 412 can also be arranged in a stepped structure so that the peripheral support of the vibration system 3 of the sound unit 100 is fixed to the stepped structure, which is not limited here.

[0069] As will be appreciated, to further enhance the sound quality of the sound module 500, the rear acoustic cavity 440 of the sound module 500 may be filled with sound-absorbing particles. To prevent the sound-absorbing particles from entering the interior of the sound unit 100 and affecting the magnetic circuit system 2 and vibration system 3 of the sound unit 100, the sound module 500 also includes an isolation and ventilation structure, which is provided within the rear acoustic cavity 440 and is used to prevent the sound-absorbing particles from entering the interior of the sound unit 100. This is not limited to this.

[0070] It should be noted that the structure of the module housing 400 is not limited to the module upper shell 410 and the module lower shell 420. Of course, in other embodiments, the module housing 400 also includes a module middle shell, which together with the module upper shell 410 and the module lower shell 420 defines the installation space 421, which is not limited here. In this embodiment, along the vibration direction of the vibration system 3 of the sound unit 100, the module middle shell of the module housing 400 is located between the module upper shell 410 and the module lower shell 420, and the two ends of the module middle shell are respectively connected to the module upper shell 410 and the module lower shell 420.

[0071] It is understandable that the structure of the module upper shell 410 of the module housing 400 is not limited to the structural form of the present invention, and can also be other structural design forms, as long as it can support and fix the auxiliary magnet 411, which is not limited here.

[0072] In the present invention, the magnetic circuit system 2 and the vibration system 3 of the sound-emitting unit 100 are arranged relative to each other. Optionally, the magnetic circuit system 2 can be arranged in a square shape. For example, the magnetic circuit system 2 can include a central magnetic portion 22 and a side magnetic portion 23, both of which are square structures. The vibration system 3 is also arranged in a square shape. It can be understood that the periphery of the diaphragm assembly 31 of the vibration system 3 can be connected to the magnetic circuit system 2, or the magnetic circuit system 2 and the vibration system 3 can be separately assembled on the outer shell or module shell, etc., which is not limited here.

[0073] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound unit 100. In one embodiment, as shown in Figures 3 to 7, the sound unit 100 also includes a housing 1, the magnetic circuit system 2 is connected to one end of the housing 1, and the vibration system 3 is connected to the other end of the housing 1 and is arranged opposite to the magnetic circuit system 2. That is, the periphery of the diaphragm assembly 31 of the vibration system 3 is connected to the other end of the housing 1 and is arranged opposite to the magnetic circuit system 2.

[0074] In this embodiment, the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The housing 1 in this embodiment can be optionally a square frame or frame structure, that is, the housing 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the housing 1 and are arranged relative to each other, so that the magnetic circuit system 2, the housing 1 and the diaphragm assembly 31 of the vibration system 3 enclose to form a vibration cavity.

[0075] It can be understood that the sound unit 100 sets the magnetic circuit system 2 as a magnetic yoke 21 and a central magnetic part 22 and a side magnetic part 23 provided 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 part 23, which is not limited here.

[0076] In this embodiment, the side magnetic portion 23 is located outside the central magnetic portion 22 and is enclosed with the central magnetic portion 22 to form a magnetic gap 24, so that the diaphragm assembly 31 of the vibration system 3 is connected to the end of the housing 1 away from the magnetic yoke 21, and is opposite to and spaced from the magnetic circuit system 2, so that one end of the voice coil 32 is connected to the diaphragm assembly 31, and the other end of the voice coil 32 is set corresponding to the magnetic gap 24.

[0077] It should be noted that the voice coil 32 can be a flat voice coil, which is fixed on the side of the diaphragm assembly 31 facing the magnetic circuit system 2, and is opposite to and spaced from the magnetic gap 24 of the magnetic circuit system 2, that is, the other end of the voice coil 32 is located outside the magnetic gap 24, and along the vibration direction of the vibration system 3, the other end of the voice coil 32 is opposite to the magnetic gap 24; or, the voice coil 32 is a ring-shaped runway voice coil, in which case one end of the voice coil 32 is connected to the diaphragm assembly 31, and the other end of the voice coil 32 is suspended in the magnetic gap 24, which is not limited here.

[0078] In order to achieve electrical connection between the voice coil 32 of the sound unit 100 and the external circuit, in one embodiment, as shown in Figures 3 to 7, the sound unit 100 further includes a centering support 33, one end of which is connected to the voice coil 32, and the other end of which is connected to the housing 1.

[0079] As will be appreciated, the ends of the damper 33 are electrically connected to the leads of the voice coil 32 and the external circuit, respectively. In this embodiment, the dampers 33 can be disposed at the bottom of the voice coil 32, positioned at the four corners of the sound unit 100 or along the minor or major axis of the sound unit 100. Alternatively, the dampers 33 can be disposed at the top of the voice coil 32, positioned between the voice coil 32 and the diaphragm assembly 31, without limitation.

[0080] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312 disposed on the diaphragm 311. Optionally, the magnetic conductive portion 3121 is disposed on the vibration plate 312.

[0081] In this embodiment, as shown in Figures 3 to 7, the diaphragm 311 includes a rim portion, a fixed portion connected to the outer side of the rim portion, and a central portion connected to the inner side of the rim portion. The vibration plate 312 is disposed in the central portion. It will be appreciated that the fixed portion, rim portion, and central portion of the diaphragm 311 are sequentially connected to form an integrally formed structure, thereby ensuring the vibration performance and structural strength of the diaphragm 311. Optionally, the rim portion of the diaphragm 311 may have an upwardly protruding convex structure or a downwardly concave structure, which is not limited here.

[0082] As will be appreciated, the vibrating plate 312 disposed in the center of the diaphragm 311 effectively strengthens the structural strength of the center portion of the diaphragm 311. By disposing the magnetic conductive portion 3121 on the vibrating plate 312, the magnetic conductive portion 3121 interacts with the auxiliary magnet 411 or the magnetic circuit system 2 to generate a static magnetostatic force, thereby changing the stiffness of the diaphragm 311. Alternatively, the center portion of the diaphragm 311 may be a flat plate structure or an annular structure.

[0083] Optionally, a receiving groove is provided in the central portion of the diaphragm 311, and at least a portion of the vibration plate 312 is confined 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 receiving groove can be conveniently utilized to install and accommodate the vibration plate 312, ensuring that the upper surface of the vibration plate 312 is flush with the upper surface of the diaphragm 311, thereby reducing the height of the sound-emitting unit 100 along the vibration direction of the vibration system 3 and ensuring the vibration performance of the entire diaphragm assembly 31.

[0084] To reduce the weight of the diaphragm assembly 31, the diaphragm 311 is provided with an inner annular hole 3111, and the vibration plate 312 is disposed over the inner annular hole 3111. In this embodiment, the inner annular hole 3111 is provided in the center of the diaphragm 311, and the periphery of the vibration plate 312 is connected to the center. The vibration plate 312 can be connected to the side of the center of the diaphragm 311 facing the voice coil 32 or the side facing away from the voice coil 32.

[0085] Optionally, a stepped surface is formed on the periphery of the vibration plate 312, and the side of the diaphragm 311 adjacent to the inner ring hole 3111 is supported and connected to the stepped surface, and the stepped surface is located between the voice coil 32 and the diaphragm 311. It can be understood that by providing the stepped surface on the periphery of the vibration plate 312 so that the stepped surface is recessed toward the side of the voice coil 32, it is ensured that when the central portion of the diaphragm 311 is overlapped and supported on the stepped surface of the vibration plate 312, the upper surface of the central portion of the diaphragm 311 is flush with the upper surface of the vibration plate 312, thereby making the assembly structure more compact and ensuring the vibration performance of the entire diaphragm assembly 31.

[0086] In this embodiment, a magnetic conductive portion 3121 is provided on the diaphragm assembly 31 of the vibration system 3, and at least a portion of the module upper shell 410 of the module shell 400 is located on the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2, and an auxiliary magnet 411 is provided on the module upper shell 410, so that there is a first suction force between the magnetic conductive portion 3121 and the auxiliary magnet 411, and a second suction force is provided between the magnetic conductive portion 3121 and the magnetic circuit system 2. When the sound unit 100 is in a non-working state, the vibration system 3 is located in a balanced position between the auxiliary magnet 411 and the magnetic circuit system 2 under the action of the combined force of the first suction force and the second suction force.

[0087] It is understandable that when the vibration system 3 is working, the resultant force of the first suction force and the second suction force is opposite to the direction of the strain recovery force of the vibration system 3 and is less than the strain recovery force of the diaphragm 311; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first suction force and the second suction force is no greater than the stiffness of the vibration system 3. Under the action of the resultant force of the first suction force and the second suction force, the vibration system 3 is located in a balanced position between the auxiliary magnet 411 and the magnetic circuit system 2. In this way, the stiffness of the vibration system 3 is reduced by static magnetoelectric force. In this way, by introducing static magnetoelectric force into the vibration system 3 and reducing the stiffness of the vibration system 3 by static magnetoelectric force, the effect of significantly improving low frequencies is achieved.

[0088] It should be noted that auxiliary magnets 411 and a magnetic circuit system 2 for attracting the magnetic permeable portion 3121 are further provided on both sides of the magnetic permeable portion 3121 in the vibration direction. That is, the auxiliary magnets 411 and the magnetic circuit system 2 are respectively located on both sides of the magnetic permeable portion 3121, so that when the magnetic permeable portion 3121 vibrates with the vibration system 3, the magnetic permeable portion 3121 can be close to the auxiliary magnets 411 or close to the magnetic circuit system 2. Alternatively, the auxiliary magnets 411 and the magnetic circuit system 2 can be provided by magnets.

[0089] In this embodiment, the magnetization direction of the auxiliary magnet 411 is opposite to that of the central magnet 221 in the central magnetic portion 22. As a result, the magnetic flux lines generated by the auxiliary magnet 411 and the magnetic flux lines generated by the central magnetic portion 22 are opposite in direction and repel each other. These two magnetic flux lines pass transversely through the voice coil 32, thereby increasing the magnetic flux lines acting on the voice coil 32, increasing the BL value of the product, and thus improving the sound sensitivity of the sound unit 100.

[0090] When the magnetic permeable portion 3121 approaches the auxiliary magnet 411, it moves away from the magnetic circuit system 2. Consequently, the attraction between the magnetic permeable portion 3121 and the auxiliary magnet 411 increases, while the attraction between the magnetic permeable portion 3121 and the magnetic circuit system 2 decreases. The combined force of the first and second attractive forces is directed toward the auxiliary magnet 411. The total attractive force exerted on the magnetic permeable portion 3121 acts as a force on the vibration system 3.

[0091] Based on the same principle, when the magnetic permeable portion 3121 approaches the magnetic circuit system 2, it moves away from the auxiliary magnet 411. Therefore, the attractive force between the magnetic permeable portion 3121 and the auxiliary magnet 411 decreases, while the attractive force between the magnetic permeable portion 3121 and the magnetic circuit system 2 increases. The combined force of the first and second attractive forces is directed toward the magnetic circuit system 2. The total attractive force exerted on the magnetic permeable portion 3121 acts as a force on the vibration system 3.

[0092] Optionally, when the vibration system 3 is in equilibrium, the attraction of the auxiliary magnet 411 on the magnetic conductive portion 3121 is equal to the attraction of the magnetic circuit system 2 , so as to prevent the attraction on the magnetic conductive portion 3121 from affecting the equilibrium position of the vibration system 3 .

[0093] Specifically, taking the vertical vibration of the vibration system 3 as an example, when the vibration system 3 is not operating, the diaphragm assembly 31 is located in the initial position. When the vibration system 3 is operating, the voice coil 32 drives the diaphragm assembly 31 to vibrate up and down. When the diaphragm assembly 31 is located above the initial position, the strain recovery force of the diaphragm 311 is directed downward. At this time, the first suction force between the magnetic conductive portion 3121 and the auxiliary magnet 411 is directed upward, and the second suction force between the magnetic conductive portion 3121 and the magnetic circuit system 2 is directed downward. The first suction force is greater than the second suction force. The combined force of the first and second suction forces is less than the strain recovery force of the diaphragm 311 and is directed upward. As a result, the combined force of the first and second suction forces acts on the diaphragm 311 to offset a portion of the strain recovery force of the diaphragm 311. Similarly, when the diaphragm assembly 31 is located below the initial position, the direction of the strain recovery force of the diaphragm 311 is upward. At this time, the first suction force between the magnetic conductive portion 3121 and the auxiliary magnet 411 is upward, and the second suction force between the magnetic conductive portion 3121 and the magnetic circuit system 2 is downward, and the second suction force is greater than the first suction force. The combined force of the first suction force and the second suction force is less than the strain recovery force of the diaphragm 311 and is directed downward. Therefore, the combined force of the first suction force and the second suction force acts on the diaphragm 311 to offset part of the strain recovery force of the diaphragm 311.

[0094] In summary, when the vibration system 3 is operating, the resultant force of the first and second suction forces is in the opposite direction to the strain recovery force of the diaphragm 311 and is smaller than the strain recovery force of the diaphragm 311. When the vibration system 3 stops operating, the equivalent stiffness of the resultant force of the first and second suction forces is no greater than the stiffness of the diaphragm 311.

[0095] Specifically, when the sound unit 100 is in a non-operating state and the vibration system 3 is in an equilibrium position, the equivalent stiffness of the resultant force of the first attractive force between the magnetic conductive portion 3121 and the auxiliary magnet 411 and the second attractive force between the magnetic conductive portion 3121 and the magnetic circuit system 2 is no greater than the stiffness of the diaphragm 311. In other words, in a non-operating state, when the vibration system 3 is in an equilibrium position, the resultant force of the first attractive force between the magnetic conductive portion 3121 and the auxiliary magnet 411 and the second attractive force between the magnetic conductive portion 3121 and the magnetic circuit system 2 cannot drive the diaphragm assembly 31 to vibrate, thereby preventing the influence of the static magnetic force on the equilibrium position of the vibration system 3 when the sound unit 100 is in a non-operating state.

[0096] It should be noted that the force exerted on the vibration system 3 by the first attraction between the magnetic conductive part 3121 and the auxiliary magnet 411 and the second attraction between the magnetic conductive part 3121 and the magnetic circuit system 2 is not fixed. The greater the distance the vibration system 3 deviates from its equilibrium position, the greater the force exerted on the vibration system 3 by the first attraction between the magnetic conductive part 3121 and the auxiliary magnet 411 and the second attraction between the magnetic conductive part 3121 and the magnetic circuit system 2. The smaller the distance the vibration system 3 deviates from its equilibrium position, the smaller the force exerted on the vibration system 3 by the first attraction between the magnetic conductive part 3121 and the auxiliary magnet 411 and the second attraction between the magnetic conductive part 3121 and the magnetic circuit system 2. The static magnetic force performance is shown in Figure 8.

[0097] Specifically, the system stiffness Kms consists of two parts: the stiffness Km of the vibration system 3 and the stiffness Kb of the cavity, that is, Kms = Km + Kb. Considering that the static magnetoforce is related to the position of the diaphragm assembly 31, similar to the system stiffness Kms, the stiffness generated by the static magnetoforce is defined as Kt, Kt = static magnetoforce / displacement in the vibration direction. At this time, the total stiffness of the system becomes: Kms = Km + Kb - Kt, where Kms is the system stiffness, Km is the stiffness of the vibration system 3, and Kb is the cavity stiffness. At this time, as the displacement increases, the stiffness generated by the static magnetoforce increases and the system stiffness decreases. That is, the larger the amplitude, the "softer" the system, "matching" the trend of the BL(x) curve, and the lower the low-frequency performance, as shown in Figures 9 and 10.

[0098] The sound module 500 of the present invention is configured so that the module shell 400 is configured as a connected module upper shell 410 and a module lower shell 420, so that the module upper shell 410 is located on the side of the diaphragm assembly 31 of the sound unit 100 facing away from the magnetic circuit system 2, and the diaphragm assembly 31 is configured as a diaphragm 311 and a vibration plate 312 arranged on the diaphragm 311, and a magnetic conductive portion 3121 is arranged on the vibration plate 312, and an auxiliary magnet 411 is arranged on the module upper shell 410, so that the magnetization direction of the auxiliary magnet 411 is opposite to the magnetization direction of the central magnetic portion 22, so that there is a first attraction between the magnetic conductive portion 3121 and the auxiliary magnet 411, and there is a second attraction between the magnetic conductive portion 3121 and the magnetic circuit system 2. In this way, the magnetic conductive portion 3121 interacts with the auxiliary magnet 411 of the module upper shell 410 and the magnetic circuit system 2 respectively, thereby introducing static magnetic force into the vibration system 3, thereby effectively reducing the strain recovery force of the diaphragm assembly 31 during movement.

[0099] It can be understood that by providing the magnetic conductive part 3121 and the auxiliary magnet 411, a static magnetic force is introduced into the vibration system 3, so that when the vibration system 3 is working, the resultant force of the first suction force and the second suction force is opposite to the direction of the strain recovery force of the diaphragm 311 and is smaller than the strain recovery force of the diaphragm 311; when the vibration system 3 stops working, the equivalent stiffness of the resultant force of the first suction force and the second suction force is not greater than the stiffness of the diaphragm 311, and the stiffness of the vibration system 3 is reduced by the static magnetic force, so that the compliance of the diaphragm assembly 31 is better, thereby greatly improving the low-frequency effect of the sound module 500.

[0100] In one embodiment, the magnetic conductive portion 3121 may be a magnetic conductive plate made of SPCC or SUS430. Of course, the vibration plate 312 may also be made of a magnetic conductive material, so that the vibration plate 312 forms the magnetic conductive portion 3121 .

[0101] In one embodiment, the magnetic conductive portion 3121 is bonded to the vibration plate 312. For example, the magnetic conductive portion 3121 may be attached to the vibration plate 312 using glue. Alternatively, the magnetic conductive portion 3121 may be welded to the vibration plate 312. For example, the magnetic conductive portion 3121 may be attached to the vibration plate 312 using soldering. Of course, in other embodiments, the magnetic conductive portion 3121 and the vibration plate 312 may also be integrally injection molded, that is, the magnetic conductive portion 3121 and the vibration plate 312 are injection molded into a single piece, which is not limited here.

[0102] In one embodiment, the magnetic conductive portion 3121 is disposed on the side of the vibration plate 312 facing the module upper shell 410; and / or, the magnetic conductive portion 3121 is disposed on the side of the vibration plate 312 facing the central magnetic portion 22; and / or, the vibration plate 312 is provided with a fixed cavity, and the magnetic conductive portion 3121 is disposed in the fixed cavity.

[0103] It is understood that the magnetic conductive portion 3121 can be disposed on at least one side of the vibration plate 312, that is, the magnetic conductive portion 3121 can be disposed on one side of the vibration plate 312 or on two opposing sides. In this embodiment, the vibration plate 312 has a first surface and a second surface disposed in opposite directions, with the first surface facing the module upper shell 410. In this case, the magnetic conductive portion 3121 can be disposed on the first surface, as shown in Figures 4 to 7; the magnetic conductive portion 3121 can also be disposed on the second surface; or the magnetic conductive portion 3121 can be disposed on both the first surface and the second surface.

[0104] Of course, the magnetic conductive portion 3121 can also be disposed in the vibration plate 312, that is, the magnetic conductive portion 3121 is embedded in the vibration plate 312 or injection molded in the vibration plate 312. In one embodiment, a fixed cavity is defined in the vibration plate 312, and the magnetic conductive portion 3121 is disposed in the fixed cavity.

[0105] In one embodiment, multiple magnetic conductive portions 3121 are provided. It is understood that the multiple magnetic conductive portions 3121 can be disposed on the same side of the vibration plate 312, or on different sides of the vibration plate 312. For example, the multiple magnetic conductive portions 3121 can be disposed on either the first or second surface of the vibration plate 312, or on both the first and second surfaces of the vibration plate 312. This is not a limitation.

[0106] It is understood that when multiple magnetic conductive portions 3121 are disposed on the same side of the vibration plate 312, the multiple magnetic conductive portions 3121 are arranged in a spliced ​​arrangement. For example, two adjacent magnetic conductive portions 3121 within the multiple magnetic conductive portions 3121 are arranged closely together, i.e., there is no gap. When multiple magnetic conductive portions 3121 are disposed on the same side of the vibration plate 312, the multiple magnetic conductive portions 3121 are arranged in an interval arrangement. For example, there is a gap between two adjacent magnetic conductive portions 3121 within the multiple magnetic conductive portions 3121.

[0107] Optionally, the magnetic conductive portion 3121 is circular, elliptical, or polygonal. That is, the shape of the magnetic conductive portion 3121 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the auxiliary magnet 411 and the magnetic conductive portion 3121, the structure of the magnetic conductive portion 3121 can be symmetrical or regular, without limitation.

[0108] In this embodiment, the auxiliary magnet 411 and the magnetic conductive portion 3121 are optionally positioned opposite each other. As will be appreciated, this arrangement ensures magnetic attraction between the auxiliary magnet 411 and the magnetic conductive portion 3121. To further ensure the balance of the vibration system 3 of the sound unit 100, the central axis of the magnetic conductive portion 3121 coincides with the central axis of the sound module 500. Alternatively, the central axis of the magnetic conductive portion 3121 coincides with the central axis of the sound unit 100.

[0109] In one embodiment, the diaphragm 311 is provided with an inner ring hole 3111, the vibration plate 312 is covered in the inner ring hole 3111, the vibration plate 312 is provided with a fixing groove 3122, and the magnetic conductive portion 3121 is provided in the fixing groove 3122. It can be understood that, as shown in Figures 3 to 7, the fixing groove 3122 can be a groove structure recessed in the vibration plate 312. Optionally, the fixing groove 3122 is formed by the side of the vibration plate 312 facing away from the central magnetic portion 22 being recessed in a direction close to the central magnetic portion 22, that is, the side of the vibration plate 312 facing away from the central magnetic portion 22 is recessed in a direction close to the central magnetic portion 22 to form the fixing groove 3122. Alternatively, the fixing groove 3122 can be formed by the side of the vibration plate 312 facing the central magnetic portion 22 being recessed toward the module upper shell 410, which is not limited here.

[0110] In one embodiment, the central magnetic portion 22 includes a stacked central magnet 221 and a central magnetic conductive plate 222 . The central magnet 221 is connected to the magnetic conductive yoke 21 . The central magnetic conductive plate 222 has a recessed area 223 corresponding to the magnetic conductive portion 3121 .

[0111] In this embodiment, as shown in Figures 3 to 7, the central magnetic portion 22 includes one or more central magnets 221 and a central magnetic plate 222. The central magnets 221 and the central magnetic plate 222 are stacked. When there are multiple central magnets 221 and multiple central magnetic plates 222, the multiple central magnets 221 and the multiple central magnetic plates 222 are alternately stacked, and one central magnet 221 is connected to the magnetic yoke 21. When there is only one central magnet 221 and one central magnetic plate 222, the central magnet 221 is sandwiched between the central magnetic plate 222 and the magnetic yoke 21.

[0112] Optionally, the central magnetic portion 22 may be provided in an annular structure, such that a through-hole structure is formed in the center of the central magnetic portion 22. Of course, in other embodiments, the central magnetic portion 22 includes multiple strip-shaped structures, which enclose a ring-shaped structure, and the multiple strip-shaped structures enclose a through-hole structure, which is not limited here. Alternatively, the central magnetic portion 22 may be a square plate-shaped structure, which is not limited here.

[0113] It can be understood that the central magnetic conductive plate 222 is arranged in an integral ring shape, so that a recessed area 223 is formed in the center of the central magnetic conductive plate 222. Of course, in other embodiments, the central magnetic conductive plate 222 includes multiple central magnetic conductive plates 222, and the multiple central magnetic conductive plates 222 are surrounded in an annular shape to form the recessed area 223; or, the central magnetic conductive plate 222 is a plate-like structure, which is not limited here. Optionally, the central magnet 221 can be optionally arranged in an annular shape, that is, the central magnet 221 is arranged in an integral ring shape, so that a second through hole is formed in the center of the central magnet 221. Of course, in other embodiments, the central magnet 221 includes multiple central magnets 221, and the multiple central magnets 221 are surrounded in an annular shape to form the second through hole; or, the central magnet 221 is a plate-like structure, which is not limited here.

[0114] In this embodiment, by providing a recessed area 223 on the central magnetic conductive plate 222 of the central magnetic portion 22, the influence of the magnetic focusing effect of the central magnetic conductive plate 222 on the second attractive force can be reduced, thereby effectively increasing the magnetic attraction between the magnetic conductive portion 3121 and the central magnet 221. It can be understood that the provision of the recessed area 223 is also conducive to avoiding the fixing groove 3122 of the vibration plate 312. Optionally, a portion of the central magnetic conductive plate 222 is recessed in a direction away from the diaphragm assembly 31 to form the recessed area 223. Of course, in other embodiments, the recessed area 223 is a through-hole structure that passes through the central magnetic conductive plate 222.

[0115] It is understandable that the recessed area 223 may be a through hole or notch structure penetrating the central magnetic conductive plate 222. Of course, the recessed area 223 may also be a groove structure formed by the central magnetic conductive plate 222 being recessed in a direction away from the diaphragm assembly 31, which is not limited here.

[0116] 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, and the protrusion 224 is located in the through hole.

[0117] In this embodiment, as shown in FIG7 , by providing a protrusion 224 on the central magnet 221 so that the protrusion 224 is located within the through hole, the magnetic attraction between the central magnet 221 and the magnetic conductive portion 3121 can be effectively increased. It is understood that in order to prevent the protrusion 224 of the central magnet 221 from affecting the vibration of the fixing groove 3122 of the vibration plate 312 when the diaphragm 311 vibrates, the end surface of the protrusion 224 facing the diaphragm 311 may optionally not exceed the end surface of the central magnetic conductive plate 222 facing the diaphragm 311, thereby effectively avoiding the fixing groove 3122 of the vibration plate 312. Optionally, the recessed area 223 may be provided corresponding to the fixing groove 3122, which is not limited herein.

[0118] In one embodiment, the side magnet portion 23 includes side magnets and side magnetic conductive plates disposed on the side magnets. As will be appreciated, as shown in Figures 3 to 7 , the side magnets and side magnetic conductive plates of the side magnet portion 23 are stacked on the magnetic yoke 21, with the side magnets connected to the magnetic yoke 21. The side magnets and side magnetic conductive plates of the side magnet portion 23 are located outside the central magnetic portion 22 and separated to form a magnetic gap 24.

[0119] In one embodiment, the edge magnet portion 23 may be annular, in which case the annular edge magnet portion 23 is located outside the central magnet portion 22 and is spaced apart from the central magnet portion 22 to form a magnetic gap 24. Optionally, the edge magnets and / or the edge magnetic conductive plates form a closed, integrated annular structure.

[0120] Of course, in other embodiments, the edge magnetic portion 23 includes a plurality of edge magnetic portions 23, and the plurality of edge magnetic portions 23 are arranged around the outside of the central magnetic portion 22, and are spaced apart from the central magnetic portion 22 to form a magnetic gap 24. Optionally, both the edge magnets and the edge magnetic conductive plates are multiple, and are arranged one-to-one, and adjacent edge magnets are connected end to end to form a closed annular structure. Alternatively, the edge magnets form a closed integral annular structure, the edge magnetic conductive plates are multiple, and adjacent edge magnetic conductive plates are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnets; or, the edge magnetic conductive plates form a closed integral annular structure, the edge magnets are multiple, and adjacent edge magnets are connected end to end to form a closed annular structure, and are arranged corresponding to the annular edge magnetic conductive plates. This is not limited here.

[0121] It should be noted that, in order to facilitate the installation of the centering support piece 33, multiple side magnets 23 are arranged around the outside of the central magnet part 22, and a gap is provided between two adjacent side magnets 23 for avoiding the centering support piece 33, which is not limited here.

[0122] In one embodiment, a positioning post is provided on the periphery of the side of the housing 1 facing away from the diaphragm assembly 31. A positioning notch is provided on the magnetic yoke 21 corresponding to the positioning post, and the positioning post and the positioning notch are positioned and engaged. It will be appreciated that by providing the positioning post on the housing 1 and forming the positioning notch on the magnetic yoke 21 to engage with the positioning post, the magnetic circuit system 2 can be positioned and installed, thereby improving installation convenience and accuracy.

[0123] In this embodiment, as shown in Figures 3 to 7, the edge magnetic portion 23 includes stacked edge magnets and edge magnetic conductive plates. The edge magnets are sandwiched between the edge magnetic conductive plates and the magnetic conductive yoke 21. The edge magnetic conductive plates are connected to the housing 1. Optionally, the edge magnetic conductive plates and the housing 1 are integrally formed, which can simplify the structure and improve installation stability.

[0124] In one embodiment, the centering supports 33 include multiple ones, one ends of the multiple centering supports 33 are respectively connected to the voice coil 32 and are respectively electrically connected to the leads of the voice coil 32, and the other ends of the multiple centering supports 33 are respectively connected to the housing 1, thereby improving the operating stability of the vibration system 3.

[0125] Optionally, multiple centering supports 33 are distributed along the long axis direction and / or short axis direction of the magnetic circuit system 2 and / or the diagonal or four corner positions of the magnetic circuit system 2. It is understandable that multiple centering supports 33 can be symmetrically distributed along the long axis direction of the magnetic circuit system 2; multiple centering supports 33 can also be symmetrically distributed along the short axis direction of the magnetic circuit system 2; multiple centering supports 33 can also be arranged in correspondence at the diagonal positions of the magnetic circuit system 2; multiple centering supports 33 can also be arranged in correspondence at the four corner positions of the magnetic circuit system 2. Of course, in other embodiments, multiple centering supports 33 can be distributed along the long axis direction of the magnetic circuit system 2, the short axis direction of the magnetic circuit system 2, and the diagonal or four corner positions of the magnetic circuit system 2, and this is not limited here.

[0126] Optionally, the centering supports 33 include two or four. This arrangement can not only utilize the centering supports 33 to connect the voice coil 32 to the external circuit, but also ensure the vibration balance of the sound unit 100.

[0127] It is understood that when there are two centering supports 33, the two centering supports 33 are spaced apart along the long axis of the magnetic circuit system 2; alternatively, the two centering supports 33 are spaced apart along the short axis of the magnetic circuit system 2, without limitation herein. Of course, when there are four centering supports 33, the four centering supports 33 can also be positioned correspondingly along the four corners of the magnetic circuit system 2. The present invention does not specifically limit the arrangement of the centering supports 33.

[0128] In one embodiment, each centering support 33 includes a first connection portion, an elastic arm, and a second connection portion connected in sequence. The first connection portion is connected to the voice coil 32 and electrically connected to the lead of the voice coil 32 , and the second connection portion is connected to the housing 1 .

[0129] In this embodiment, as shown in Figure 3 , the first connecting portion, elastic arm, and second connecting portion of the centering arm 33 can be integrally formed. This effectively ensures the structural strength of the centering arm 33 while simplifying the processing steps for the centering arm 33. It will be appreciated that to ensure the deformability of the centering arm 33, the elastic arm has at least one bend.

[0130] In one embodiment, as shown in Figure 3 , the first connection portion, the elastic arm, and the second connection portion of damper 33 may be located in the same plane. Of course, in other embodiments, the first and second connection portions of damper 33 may also be located in different planes. It will be appreciated that damper 33 can be used to connect the external circuit to voice coil 32 and effectively prevent issues such as oscillation or polarization of voice coil 32 during vibration.

[0131] In one embodiment, the module upper shell 410 cooperates with the sound unit 100 to form a front sound cavity 430, and the module shell 400 is provided with a sound outlet hole 413 connected to the front sound cavity 430; wherein, the auxiliary magnet 411 is arranged on the side of the module upper shell 410 facing the front sound cavity 430; and / or, the auxiliary magnet 411 is arranged on the side of the module upper shell 410 facing away from the front sound cavity 430; and / or, the module upper shell 410 is provided with an installation cavity, and the auxiliary magnet 411 is arranged in the installation cavity.

[0132] In this embodiment, the position where the auxiliary magnet 411 is set on the module upper shell 410 is spaced apart from the diaphragm assembly 31, that is, a front sound cavity 430 is formed between the module upper shell 410 and the diaphragm assembly 31. It is understandable that the module upper shell 410 can optionally be in an inverted U-shape or a pot cover or a hat structure, which is not limited here. It should be noted that the structure of the module upper shell 410 is not limited to the above-mentioned structural form, and can also be other structural design forms, as long as it can support and fix the auxiliary magnet 411, which is not limited here.

[0133] It is understandable that the module upper shell 410 can be made of metal, plastic, or injection molded from metal and plastic, which is not limited here. Optionally, the auxiliary magnet 411 is bonded to the module upper shell 410. For example, the auxiliary magnet 411 can be fixed to the module upper shell 410 by bonding with an adhesive layer. Of course, in other embodiments, the auxiliary magnet 411 can also be welded to the module upper shell 410, for example, the auxiliary magnet 411 can be fixed to the module upper shell 410 by soldering, which is not limited here.

[0134] To facilitate the processing of the module upper shell 410 and improve the connection strength between the module upper shell 410 and the auxiliary magnet 411, the auxiliary magnet 411 is optionally integrally injection molded with the module upper shell 410. In this embodiment, the auxiliary magnet 411 is optionally made of a magnetic conductive material. Optionally, the auxiliary magnet 411 is a magnet.

[0135] In one embodiment, the auxiliary magnet 411 is arranged on the side of the module upper shell 410 facing the diaphragm assembly 31; and / or, the auxiliary magnet 411 is arranged on the side of the module upper shell 410 facing away from the diaphragm assembly 31; and / or, the module upper shell 410 is provided with an installation cavity, and the auxiliary magnet 411 is arranged in the installation cavity.

[0136] It is understood that the auxiliary magnet 411 can be disposed on at least one side of the module upper shell 410, that is, the auxiliary magnet 411 can be disposed on one side or two opposite sides of the module upper shell 410. In this embodiment, the module upper shell 410 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 auxiliary magnet 411 can be disposed on the upper surface; the auxiliary magnet 411 can also be disposed on the lower surface, as shown in Figures 4 and 5; the auxiliary magnet 411 can also be disposed on both the upper and lower surfaces.

[0137] Of course, the auxiliary magnet 411 can also be disposed in the module upper shell 410, that is, the auxiliary magnet 411 is embedded in the module upper shell 410 or injection molded in the module upper shell 410. In one embodiment, the module upper shell 410 is provided with a mounting cavity, and the auxiliary magnet 411 is disposed in the mounting cavity.

[0138] In one embodiment, there are multiple auxiliary magnets 411. It is understood that the multiple auxiliary magnets 411 can be simultaneously disposed on the same side of the module upper shell 410; or, the multiple auxiliary magnets 411 can be simultaneously disposed on different sides of the module upper shell 410. For example, the multiple auxiliary magnets 411 can be simultaneously disposed on the upper or lower surface of the module upper shell 410; or, the multiple auxiliary magnets 411 can be simultaneously disposed on both the upper and lower surfaces of the module upper shell 410, without limitation.

[0139] It is understood that when multiple auxiliary magnets 411 are disposed on the same side of the module upper shell 410, the multiple auxiliary magnets 411 are arranged in a spliced ​​arrangement. For example, two adjacent auxiliary magnets 411 in the multiple auxiliary magnets 411 are arranged closely together, i.e., there is no gap. When multiple auxiliary magnets 411 are disposed on the same side of the module upper shell 410, the multiple auxiliary magnets 411 are arranged in an interval arrangement. For example, there is a gap between two adjacent auxiliary magnets 411 in the multiple auxiliary magnets 411.

[0140] Optionally, the auxiliary magnet 411 is circular, elliptical, or polygonal. That is, the auxiliary magnet 411 can be circular, elliptical, triangular, square, or other polygonal structures, without limitation. To ensure a balanced magnetic attraction between the auxiliary magnet 411 and the magnetic conductive portion 3121, the auxiliary magnet 411 can be symmetrical or regular, without limitation.

[0141] In this embodiment, the auxiliary magnet 411 and the magnetic conductive portion 3121 are optionally arranged to be opposite each other. It is understandable that such an arrangement can ensure the magnetic attraction between the auxiliary magnet 411 and the magnetic conductive portion 3121. In order to further ensure the balance of the vibration system 3 of the sound unit 100, the central axis of the auxiliary magnet 411 can optionally coincide with the central axis of the sound module 500. Optionally, the central axis of the auxiliary magnet 411 can optionally coincide with the central axis of the sound unit 100. Optionally, the auxiliary magnet 411 is a magnet.

[0142] In one embodiment, as shown in FIG. 5 , a mounting groove 414 is provided on a side of the module upper shell 410 facing the diaphragm assembly 31 , and the auxiliary magnet 411 is disposed in the mounting groove 414 .

[0143] In this embodiment, the mounting groove 414 can be a groove structure formed by a concave inward on one side surface of the module upper shell 410, or a concave structure formed by a concave on one side surface of the module upper shell 410 toward the other side surface, so that the other side surface is raised, without limitation here. It is understood that the mounting groove 414 can be provided on the lower surface of the module upper shell 410. Of course, in other embodiments, the mounting groove 414 can be provided on the upper surface of the module upper shell 410, without limitation here.

[0144] In one embodiment, the sound module 500 further includes a flexible circuit board, one end of the flexible circuit board is electrically connected to the sound unit 100, and the other end of the flexible circuit board is used to connect to an external power supply.

[0145] As will be understood, the flexible circuit board is used to connect the external circuit to the sound unit 100. The flexible circuit board is provided with inner and outer pads. The inner pads of the flexible circuit board are connected to the sound unit 100, while the outer pads of the flexible circuit board are used to connect to external terminals. In this embodiment, at least the end of the flexible circuit board connected to the sound unit 100 is located within the installation space 421 of the module housing 400. Of course, in other embodiments, the entire flexible circuit board can also be placed within the installation space 421 of the module housing 400, and this is not limited here.

[0146] The present invention further provides an electronic device comprising the aforementioned sound module 500. The specific structure of the sound module 500 is similar to that of the aforementioned embodiments. Since the present electronic device utilizes all the technical solutions of all the aforementioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, and therefore will not be further elaborated here.

[0147] In one embodiment, the electronic device further includes a device housing, and the sound module 500 is disposed within the device housing. In this embodiment, the device housing has a cavity, and the sound unit 100 is disposed within the cavity of the device housing. It is understood that the electronic device can be headphones, mobile phones, computers, tablet computers, smart wearable devices, etc., without limitation. Of course, the electronic device can also be an MP3, MP4, wearable device, etc., which are not listed here one by one.

[0148] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound module, characterized in that: The sound module includes: A module housing, wherein an installation space is provided in the module housing, and the module housing comprises a connected module upper shell and a module lower shell; and A sound-emitting unit, the sound-emitting unit including a magnetic circuit system and a vibration system arranged in the installation space, the magnetic circuit system including a magnetic yoke and a central magnetic portion and a side magnetic portion arranged on the magnetic yoke, the central magnetic portion and the side magnetic portion being spaced apart to form a magnetic gap, the vibration system being arranged on one side of the magnetic circuit system, the vibration system including a diaphragm assembly and a voice coil connected to the diaphragm assembly, the end of the voice coil away from the diaphragm assembly being arranged corresponding to the magnetic gap, the diaphragm assembly including a diaphragm and a vibration plate arranged on the diaphragm, the vibration plate having a magnetic conductive portion, 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 provided with an auxiliary magnet, the magnetization direction of the auxiliary magnet being opposite to the magnetization direction of the central magnetic portion; There is a first attraction between the magnetic conductive part and the auxiliary magnet, and a second attraction between the magnetic conductive part and the magnetic circuit system. When in a non-working state, the vibration system is located in a balanced position between the auxiliary magnet and the magnetic circuit system under the action of the combined force of the first attraction and the second attraction.

2. The sound module according to claim 1, wherein: The magnetic conductive portion is bonded to the vibration plate; Alternatively, the magnetic conductive portion and the vibration plate are integrally injection molded; Alternatively, the vibration plate is made of a magnetic conductive material, and the vibration plate forms the magnetic conductive portion.

3. The sound module according to claim 1, wherein: The magnetic conductive portion is provided on a side of the vibration plate facing the upper shell of the module; And / or, the magnetic conductive portion is provided on a side of the vibration plate facing the central magnetic portion; And / or, the vibration plate is provided with a fixed cavity, and the magnetic conductive part is provided in the fixed cavity.

4. The sound module according to claim 1, wherein: The magnetic conductive parts include a plurality of parts; the plurality of magnetic conductive parts are arranged on the same side or different sides of the diaphragm assembly; and / or the plurality of magnetic conductive parts are arranged in a spliced ​​manner or in an interval manner; And / or, the magnetic conductive portion is circular, elliptical or polygonal; And / or, the central axis of the magnetic conductive portion coincides with the central axis of the sound module; And / or, the magnetic conductive portion is a magnetic conductive plate, and the material of the magnetic conductive plate is SPCC or SUS430.

5. The sound module according to claim 1, wherein: The central magnetic portion includes a central magnet and a central magnetic conductive plate which are stacked. The central magnet is connected to the magnetic conductive yoke. The central magnetic conductive plate is provided with a recessed area corresponding to the magnetic conductive portion.

6. The sound module according to claim 5, wherein: A portion of the central magnetic conductive plate is recessed in a direction away from the diaphragm assembly to form the recessed area; Alternatively, the recessed area is a through-hole structure penetrating the central magnetic conductive plate.

7. The sound module according to claim 5, wherein: The recessed area is a through hole, and the central magnet is provided with a protruding portion corresponding to the through hole, and the protruding portion is located in the through hole.

8. The sound module according to claim 7, wherein: An end surface of the protrusion facing the diaphragm does not exceed an end surface of the central magnetic conductive plate facing the diaphragm.

9. The sound module according to claim 5, wherein: The diaphragm is provided with an inner ring hole, the vibration plate cover is arranged on the inner ring hole, the side of the vibration plate facing away from the central magnetic part is recessed toward the central magnetic part to form a fixing groove, and the magnetic conductive part is arranged in the fixing groove.

10. The sound module according to claim 1, wherein: The module upper shell cooperates with the sound-emitting monomer to form a front sound cavity, and the module shell is provided with a sound outlet hole communicating with the front sound cavity; Wherein, the auxiliary magnet is arranged on the side of the module upper shell facing the front acoustic cavity; and / or, the auxiliary magnet is arranged on the side of the module upper shell facing away from the front acoustic cavity; and / or, the module upper shell is provided with an installation cavity, and the auxiliary magnet is arranged in the installation cavity.

11. The sound module according to claim 1, wherein: The auxiliary magnet is bonded to the upper shell of the module; Alternatively, the auxiliary magnet and the module upper shell are integrally injection molded.

12. The sound module according to claim 1, wherein: The auxiliary magnets include a plurality of auxiliary magnets; the plurality of auxiliary magnets are arranged on the same side or different sides of the upper shell of the module; and / or the plurality of auxiliary magnets are arranged in a spliced ​​manner or in an interval manner; And / or, the auxiliary magnet is circular, elliptical or polygonal; And / or, the auxiliary magnet is a magnet; And / or, the central axis of the auxiliary magnet coincides with the central axis of the sound-emitting unit; And / or, the auxiliary magnet is arranged to face the magnetic conductive portion; And / or, a mounting groove is provided on a side of the module upper shell facing the diaphragm assembly, and the auxiliary magnet is provided in the mounting groove.

13. The sound module according to any one of claims 1 to 12, wherein: The module housing further includes a module middle shell, and the module middle shell, the module upper shell and the module lower shell together define the installation space; Along the vibration direction of the vibration system, the module middle shell is located between the module upper shell and the module lower shell, and two ends thereof are respectively connected to the module upper shell and the module lower shell.

14. An electronic device, characterized in that: The electronic device includes the sound module according to any one of claims 1 to 13.

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