Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, the sound production device comprises an outer side magnetic assembly, an inner side magnetic assembly and a vibration assembly, a magnetic gap surrounding the inner side magnetic assembly is formed between the outer side magnetic assembly and the inner side magnetic assembly, the vibration assembly comprises a voice coil, the vibration assembly is supported on the outer side magnetic assembly, and the voice coil is suspended in the magnetic gap; the inner side magnetic assembly comprises a first inner side magnet and a second inner side magnet which are stacked in the vibration direction of the voice coil, opposite magnetic poles of the first inner side magnet and the second inner side magnet are a first magnetic pole and a second magnetic pole respectively, the first magnetic pole and the second magnetic pole are the same in polarity, and the outer side magnetic assembly is provided with a third magnetic pole; the third magnetic pole is respectively matched with the first magnetic pole and the second magnetic pole, and the polarity of the third magnetic pole is opposite to that of the first magnetic pole. According to the scheme, the problem of poor sound performance caused by relatively small power BL value of the sound production device in the related technology can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment design, and specifically relates to a sound-generating device and an electronic equipment. Background Art

[0002] The sound device (such as a speaker, a receiver) is an important sound module in electronic devices, responsible for the sound function of electronic devices. With the improvement of user needs, users have put forward higher requirements for the sound performance of electronic devices.

[0003] The related art involves a sound-generating device installed in an electronic device (such as a mobile phone). As electronic devices become thinner and lighter, the inner cavity space of the electronic device becomes smaller and smaller, resulting in the design of the sound-generating device being miniaturized. In this case, due to the tight layout space of the entire electronic device and the small inner cavity of the electronic device, the dynamic BL value (i.e., dynamic force coefficient) generated by the voice coil of the sound-generating device cutting the magnetic lines of force is small, and good sound performance cannot be achieved. In order to improve the dynamic BL value of the sound-generating device, the related art achieves this by increasing the current passed through the voice coil, but in this case, the increase in the current of the voice coil will bring about the problem of greater heat generation, which will eventually easily cause the sound-generating device to overheat during operation. Summary of the invention

[0004] The invention discloses a sound-generating device and an electronic device, so as to solve the problem that the sound-generating device involved in the related art has a small power BL value, resulting in poor sound performance.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: In a first aspect, the present application discloses a sound-generating device, the disclosed sound-generating device comprising an outer magnetic component, an inner magnetic component and a vibration component, wherein: A magnetic gap is formed between the outer magnetic assembly and the inner magnetic assembly, surrounding the inner magnetic assembly; the vibration assembly includes a voice coil, the vibration assembly is supported on the outer magnetic assembly, and the voice coil is suspended in the magnetic gap; The inner magnetic assembly includes a first inner magnet and a second inner magnet stacked in the vibration direction of the voice coil, the relative poles of the first inner magnet and the second inner magnet are respectively a first pole and a second pole, and the polarity of the first pole is the same as that of the second pole, and the outer magnetic assembly has a third pole, which cooperates with the first pole and the second pole respectively, and the polarity of the third pole is opposite to that of the first pole.

[0006] In a second aspect, the present application discloses an electronic device, comprising a housing and a sound-generating device disposed in the housing, wherein the sound-generating device is the sound-generating device described in the first aspect.

[0007] The technical solution adopted by the present invention can achieve the following technical effects: The sound-generating device disclosed in the embodiment of the present application improves the structure of the sound-generating device in the related art, adjusts the inner magnetic assembly to a first inner magnet and a second inner magnet stacked, and makes the polarity of the relative magnetic poles of the first inner magnet and the second inner magnet the same, and the polarity of the relative magnetic poles of the first inner magnet and the second inner magnet is opposite to the polarity of the matching magnetic poles on the outer magnetic assembly, so that the magnetic field constructed between the first inner magnet and the outer magnetic assembly is superimposed with the magnetic field constructed between the second inner magnet and the outer magnetic assembly, thereby greatly improving the magnetic field strength in the magnetic gap. In this case, when the voice coil is passed through a current equal to that before the improvement, the voice coil is subjected to a greater Ampere force, thereby improving the dynamic BL value of the sound-generating device, thereby achieving better sound performance. At the same time, the sound-generating device of this structure does not need to increase the dynamic BL value by increasing the current of the voice coil, so that the heating problem caused by the increase of the current of the voice coil can be avoided, which is conducive to improving the thermal performance of the sound-generating device. . BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a cross-sectional view of a sound-generating device disclosed in an embodiment of the present invention; Figure 2 is a schematic diagram of the magnetic circuit of the sound-generating device disclosed in an embodiment of the present invention; Figure 3 It is a schematic diagram of the explosion structure of the sound-generating device disclosed in the embodiment of the present invention.

[0009] Description of reference numerals: 10-outer magnetic assembly, 11-first outer magnet, 12-second outer magnet, 13-third magnetic conductive member, 20-inner magnetic assembly, 21-first inner magnet, 22-second inner magnet, 23-first magnetic conductive member, 30-vibration assembly, 31-voice coil, 32-first diaphragm, 33-dome, 34-second diaphragm, 35-support ring, 40-magnetic gap, 50- second magnetic conductive member, 60-FPC. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0012] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0013] Please refer to Figures 1 to 3 The embodiment of the present application discloses a sound-generating device, and the disclosed sound-generating device can be applicable to electronic devices. The disclosed sound-generating device can be a speaker or a receiver, and the embodiment of the present invention does not limit the specific type of the sound-generating device. The sound-generating device disclosed in the embodiment of the present invention can include an outer magnetic component 10, an inner magnetic component 20, and a vibration component 30.

[0014] The outer magnetic assembly 10 and the inner magnetic assembly 20 are parts of the sound-generating device that provide a magnetic field, and the outer magnetic assembly 10 is distributed around the inner magnetic assembly 20. Specifically, the outer magnetic assembly 10 is distributed around the inner magnetic assembly 20, and a magnetic gap 40 surrounding the inner magnetic assembly 20 is formed between the outer magnetic assembly 10 and the inner magnetic assembly 20. The outer magnetic assembly 10 and the inner magnetic assembly 20 are magnetically matched, so that the magnetic gap 40 is filled with a magnetic field.

[0015] The vibration component 30 is the vibrating part of the sound-generating device. In the specific sound-generating process, the vibration of the vibration component 30 can drive the air to move and thus generate sound. Specifically, the vibration component 30 includes a voice coil 31, which is supported on the outer magnetic component 10, and the voice coil 31 is suspended in the magnetic gap 40. The voice coil 31 is essentially an electromagnetic coil, which can surround the inner magnetic component 20 and be located in the magnetic gap 40, thereby forming a ring shape that matches the shape of the magnetic gap 40. In the specific sound-generating process, an electrical signal is passed into the voice coil 31. In essence, the electromagnetic coil can move in the magnetic gap 40 under the action of the magnetic field force after being energized, thereby driving the entire vibration component 30 to vibrate, and finally achieving the purpose of driving the air to move and generate sound. It should be noted that the energization of the voice coil 31 to drive the vibration component 30 to vibrate and generate sound is a well-known technology and will not be described in detail here.

[0016] In an embodiment of the present invention, the inner magnetic assembly 20 may include a first inner magnet 21 and a second inner magnet 22. The first inner magnet 21 and the second inner magnet 22 are stacked in the vibration direction of the voice coil 31. The relative polarity of the first inner magnet 21 and the second inner magnet 22 is the same, and the relative polarity of the first inner magnet 21 and the second inner magnet 22 is opposite to the polarity of the corresponding magnetic pole on the outer magnetic assembly 10. Specifically, the relative magnetic poles of the first inner magnet 21 and the second inner magnet 22 are the first magnetic pole and the second magnetic pole, respectively. The first magnetic pole and the second magnetic pole have the same polarity. The outer magnetic assembly 10 has a third magnetic pole. The third magnetic pole matches the first magnetic pole and the second magnetic pole, respectively. The polarity of the third magnetic pole is opposite to that of the first magnetic pole. Since the polarity of the first magnetic pole and the second magnetic pole are the same, the polarity of the third magnetic pole is also opposite to that of the second magnetic pole.

[0017] For example Figure 2 As shown, the relative magnetic poles of the first inner magnet 21 and the second inner magnet 22 (i.e., the first magnetic pole and the second magnetic pole) can both be N poles, and the matching magnetic poles on the outer magnetic assembly 10 (i.e., the third magnetic pole) can be S poles. In other embodiments, it can also be that the relative magnetic poles of the first inner magnet 21 and the second inner magnet 22 (i.e., the first magnetic pole and the second magnetic pole) can both be S poles, and the matching magnetic poles on the outer magnetic assembly 10 (i.e., the third magnetic pole) can be N poles. It should be noted that the embodiment of the present invention does not limit the specific polarity of the relative magnetic poles of the first inner magnet 21 and the second inner magnet 22.

[0018] In the specific sound-generating process, the relative magnetic poles (i.e., the first magnetic pole and the second magnetic pole) of the first inner magnet 21 and the second inner magnet 22 can cooperate with the corresponding magnetic poles (i.e., the third magnetic pole) on the outer magnetic assembly 10, thereby constructing a stronger magnetic field, which is beneficial to increasing the strength of the magnetic field in the magnetic gap 40, and ultimately enables the voice coil 31 moving in the magnetic gap 40 to vibrate with greater force.

[0019] The sound-generating device disclosed in the embodiment of the present invention improves the structure of the sound-generating device in the related art, adjusts the inner magnetic assembly 20 to the first inner magnet 21 and the second inner magnet 22 stacked, and makes the first magnetic pole of the first inner magnet 21 and the second magnetic pole of the second inner magnet 22 opposite and the same polarity, and the polarity of the first magnetic pole and the second magnetic pole are opposite to the polarity of the third magnetic pole matched on the outer magnetic assembly 10, so that the magnetic field constructed between the first inner magnet 21 and the outer magnetic assembly 10 is finally superimposed with the magnetic field constructed between the second inner magnet 22 and the outer magnetic assembly 10, thereby greatly improving the magnetic field strength in the magnetic gap 40. In this case, when the voice coil 31 is fed with a current equal to that before the improvement, the voice coil 31 is subjected to a greater Ampere force, thereby improving the dynamic BL value of the sound-generating device, thereby achieving better sound performance. At the same time, the sound-generating device of this structure does not need to increase the power BL value by increasing the current of the voice coil 31, thus avoiding the heating problem caused by the increase of the current of the voice coil, which is beneficial to improving the thermal performance of the sound-generating device.

[0020] In order to make the magnetic field of the inner magnetic assembly 20 more concentrated in the magnetic gap 40, in an optional solution, the inner magnetic assembly 20 disclosed in the embodiment of the present invention may also include a first magnetic conductive member 23. The first magnetic conductive member 23 may be an iron member, a steel member, etc. The embodiment of the present invention does not limit the specific material of the first magnetic conductive member 23, as long as it can be made of a magnetic conductive material to exert the magnetic conductive function. The first magnetic conductive member 23 may be a plate member or other shapes. The embodiment of the present invention does not limit the specific shape of the first magnetic conductive member 23. The first magnetic conductive member 23 is arranged between the opposite magnetic poles of the first inner magnet 21 and the second inner magnet 22, that is, between the first magnetic pole and the second magnetic pole, so that the magnetic fields of the opposite magnetic poles of the first inner magnet 21 and the second inner magnet 22 can be guided at the same time.

[0021] The sound-generating device disclosed in the embodiment of the present invention may also include a second magnetic conductive member 50. The second magnetic conductive member 50 plays a magnetic conductive role. Similarly, the embodiment of the present invention does not limit the specific material and shape of the second magnetic conductive member 50. The outer magnetic component 10 and the second inner magnet 22 are both arranged on the second magnetic conductive member 50, and the outer magnetic component 10 and the second inner magnet 22 are located between the second magnetic conductive member 50 and the vibration component 30. Specifically, the second magnetic conductive member 50 is used to guide the magnetic field between the bottom end of the second inner magnet 22 facing away from the first inner magnet 21 (that is, the end facing away from the second magnetic pole) and the bottom end of the outer magnetic component 10, so that the magnetic field between them is more filled in the magnetic gap 40. The first magnetic conductive member 23 is used to guide the magnetic field between the bottom end of the first inner magnet 21 (i.e., the end where the first magnetic pole is located) and the top end of the outer magnetic assembly 10 (i.e., the end where the third magnetic pole is located), as well as the magnetic field between the top end of the second inner magnet 22 (i.e., the end where the second magnetic pole is located) and the top end of the outer magnetic assembly 10 (i.e., the end where the third magnetic pole is located), so that the magnetic field formed therebetween can fill more of the magnetic gap 40, thereby causing the voice coil 31 to be subjected to a greater force in the magnetic gap 40, and ultimately further improving the dynamic BL value of the sound-emitting device.

[0022] In this case, the second magnetic conductive member 50 can be used as a base to provide a mounting base for the outer magnetic assembly 10 and the inner magnetic assembly 20. In a further embodiment, the second magnetic conductive member 50 can cover the port of the magnetic gap 40 away from the voice coil 31. Specifically, the second magnetic conductive member 50 can cover the bottom port of the magnetic gap 40 away from the voice coil 31, and the voice coil 31 can extend from the top port of the magnetic gap 40 into the magnetic gap 40 to be vibrated by force. It should be noted that the top port of the magnetic gap 40 and the bottom port of the magnetic gap 40 are two ports opposite to the magnetic gap 40. This structure can prevent foreign matter from invading the magnetic gap 40 from the bottom port of the magnetic gap 40, thereby preventing the adverse effects of the invading foreign matter on the vibration of the voice coil 31.

[0023] In an embodiment of the present invention, the outer magnetic assembly 10 may be an integral annular structure and cannot be separated. In other embodiments, the outer magnetic assembly 10 may include a first outer magnet 11 and a second outer magnet 12, for example, at least one of the first outer magnet 11 and the second outer magnet 12 is a semi-ring structure. The first outer magnet 11 and the second outer magnet 12 may only contact and dock to form a structure surrounding the inner magnetic assembly 20. Specifically, the first outer magnet 11 and the second outer magnet 12 enclose a receiving space, the inner magnetic assembly 20 is arranged in the receiving space, and the inner magnetic assembly 20 is surrounded by the first outer magnet 11 and the second outer magnet 12 to form a magnetic gap 40. This structure is convenient for assembly and also convenient for separate replacement of components after local damage, which is conducive to reducing maintenance costs. In other embodiments, the first outer magnet 11 and the second outer magnet 12 can also be connected by bonding, connecting parts, snap-on connection, etc. to achieve matching, and are not limited to the listed contacts.

[0024] Specifically, the magnetic poles of the first inner magnet 21 and the second inner magnet 22 may be opposite to the polarity of the corresponding magnetic poles on the first outer magnet 11, and the magnetic poles of the first inner magnet 21 and the second inner magnet 22 may be opposite to the polarity of the corresponding magnetic poles on the second outer magnet 12. That is, in this embodiment, both the first outer magnet 11 and the second outer magnet 12 may have a third magnetic pole.

[0025] In other embodiments, the outer magnetic assembly 10 may further include a plurality of third magnetic conductive members 13. The ends of the first outer magnet 11 and the second outer magnet 12 adjacent to the vibration assembly 30 (i.e., the end where the third magnetic pole is located) may be covered with the third magnetic conductive member 13. The third magnetic conductive member 13 is used to guide the magnetic field at the top of the first outer magnet 11 and the second outer magnet 12, so that the magnetic field at the top of the first outer magnet 11 and the second outer magnet 12 (i.e., the end adjacent to the voice coil 31, which is also the end where the third magnetic pole is located) is more filled in the magnetic gap 40, which is beneficial to increase the force on the voice coil 31 in the magnetic gap 40, which can further increase the dynamic BL value of the sound-emitting device.

[0026] In an embodiment of the present invention, the outer magnetic assembly 10, the inner magnetic assembly 20 and the vibration assembly 30 can be one or more. In an embodiment where they are more than one, the outer magnetic assembly 10, the inner magnetic assembly 20 and the vibration assembly 30 can correspond one to one.

[0027] In the embodiment where there are multiple outer magnetic assemblies 10, inner magnetic assemblies 20 and vibration assemblies 30, the outer magnets of two adjacent outer magnetic assemblies 10 can be connected by an integral process, so that they can be disassembled and assembled as a whole, thereby reducing the workload of disassembling and assembling them. One of the outer magnets of the two adjacent outer magnetic assemblies 10 is the first outer magnet 11 of one outer magnetic assembly 10, and the other is the second outer magnet 12 of the other outer magnetic assembly 10, such as Figure 3 shown.

[0028] In one embodiment, there are multiple outer magnetic components 10, inner magnetic components 20 and vibration components 30, and the sound-generating device can have a first sound-generating mode. When the sound-generating device is in the first sound-generating mode, the currents of the voice coils 31 of two adjacent vibration components 30 are opposite, so that the vibration directions of the two adjacent vibration components 30 are opposite. In this case, the sound waves generated by the two adjacent vibration components 30 are in opposite phases and can cancel each other out at a long distance, so that the sound-generating device can finally have the function of preventing sound leakage.

[0029] In another embodiment, the outer magnetic assembly 10, the inner magnetic assembly 20 and the vibration assembly 30 are all multiple, and the sound-generating device can have a second sound-generating mode. When the sound-generating device is in the second sound-generating mode, the currents of the voice coils 31 of the two adjacent vibration assemblies 30 are the same, so that the vibration directions of the two adjacent vibration assemblies 30 are the same. In this case, the sound waves generated by the two adjacent vibration assemblies 30 have the same phase, so that they can be superimposed on each other to strengthen the sound waves, thereby increasing the sound volume, so that the sound-generating device has better external speaker performance.

[0030] In an optional solution, there are two outer magnetic assemblies 10, two inner magnetic assemblies 20 and two vibration assemblies 30, and the two outer magnetic assemblies 10, two inner magnetic assemblies 20 and two vibration assemblies 30 can be symmetrical along the same symmetry axis. The dynamic BL value and force compliance of the sound-generating device of this structure have good symmetry, which is conducive to optimizing noise.

[0031] In the embodiment of the present invention, the structure of the vibration component 30 can be various, as long as it can be supported on the outer magnetic component 10 and vibrate together with the voice coil 31 to produce sound when the voice coil 31 is subjected to force. Figure 1 and Figure 3As shown, in an optional solution, the vibration assembly 30 includes a first diaphragm 32 and a dome 33 and a second diaphragm 34, both of which are annular. The outer edge of the second diaphragm 34 is supported on the outer magnetic assembly 10 through a support ring 35. The inner edge of the second diaphragm 34 surrounds the dome 33, and the inner edge of the second diaphragm 34 is connected to the outer edge of the dome 33. The inner edge of the dome 33 surrounds the first diaphragm 32, and the inner edge of the dome 33 is connected to the edge of the first diaphragm 32. The voice coil 31 is connected to at least one of the dome 33 and the first diaphragm 32. In this structure, the vibration assembly 30 is designed to include a first diaphragm 32 located inside the dome 33 and a second diaphragm 34 located outside the dome 33, thereby forming two vibration bodies. Compared with a single diaphragm, the vibration assembly 30 of this structure can reduce the resonance frequency of the sound-generating device. The lower the resonance frequency of the sound-generating device, the better the low-frequency response of the sound-generating device, thereby enabling the sound-generating device to effectively generate sound at a lower frequency. This is beneficial for the application of the sound-generating device in application scenarios that require enhanced bass effects (such as home theaters, subwoofers, etc.).

[0032] In a further embodiment, the first inner magnet 21 or the second inner magnet 22 disclosed in the embodiment of the present invention can be supported and matched with the first diaphragm 32, so as to improve the stability of the installation of the first diaphragm 32. In this case, the inner magnetic assembly 20 not only plays a role in enhancing the magnetic field strength in the magnetic gap 40, but also can support the first diaphragm 32, so as to achieve a dual purpose effect.

[0033] In the embodiment of the present invention, the first inner magnet 21, the second inner magnet 22, the first outer magnet 11 and the second outer magnet 12 can be magnets of the same type or magnets of different types, and the embodiment of the present invention does not limit this. At the same time, the first inner magnet 21, the second inner magnet 22, the first outer magnet 11 and the second outer magnet 12 can be ferrite or neodymium iron boron, and the embodiment of the present invention does not limit their specific materials.

[0034] The sound-generating device disclosed in the embodiment of the present invention may further include an FPC 60, and the FPC 60 may correspond to the voice coil 31 one by one, so as to supply power and transmit electrical signals to the respective voice coils 31. Specifically, the FPC 60 may be arranged on components such as the support ring 35 and the third magnetic conductive member 13, and be electrically connected to the corresponding voice coil 31. Of course, the embodiment of the present invention will not limit the specific installation position of the FPC 60.

[0035] Based on the sound-emitting device disclosed in the embodiment of the present invention, the embodiment of the present invention discloses an electronic device. The disclosed electronic device may include a shell and a sound-emitting device. The sound-emitting device may be arranged inside the shell. The sound-emitting device may be the sound-emitting device described in the above embodiment.

[0036] The electronic device disclosed in the embodiments of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device (such as a smart watch), an electronic game console, VR (Virtual Reality) glasses, and the like. The embodiments of the present application do not limit the specific types of electronic devices.

[0037] The above embodiments of the present invention focus on the differences between the various embodiments. As long as the different features of the various embodiments are not contradictory, they can be combined to form more specific embodiments. Considering the simplicity of the text, they will not be repeated here.

[0038] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A sound-generating device, characterized in that: It comprises an outer magnetic assembly (10), an inner magnetic assembly (20) and a vibration assembly (30), wherein: A magnetic gap (40) surrounding the inner magnetic component (20) is formed between the outer magnetic component (10) and the inner magnetic component (20); the vibration component (30) comprises a voice coil (31); the vibration component (30) is supported on the outer magnetic component (10), and the voice coil (31) is suspended in the magnetic gap (40); The inner magnetic assembly (20) comprises a first inner magnet (21) and a second inner magnet (22) which are stacked in the vibration direction of the voice coil (31); the first inner magnet (21) and the second inner magnet (22) have opposite magnetic poles which are respectively a first magnetic pole and a second magnetic pole; the first magnetic pole and the second magnetic pole have the same polarity; the outer magnetic assembly (10) has a third magnetic pole which matches the first magnetic pole and the second magnetic pole respectively; the third magnetic pole has an opposite polarity to the first magnetic pole.

2. The sound generating device according to claim 1, characterized in that: The vibration component (30) further comprises a first diaphragm (32) and a dome (33) and a second diaphragm (34) both of which are annular; the outer edge of the second diaphragm (34) is supported on the outer magnetic component (10) via a support ring (35); the inner edge of the second diaphragm (34) surrounds the dome (33), and the inner edge of the second diaphragm (34) is connected to the outer edge of the dome (33); the inner edge of the dome (33) surrounds the first diaphragm (32), and the inner edge of the dome (33) is connected to the edge of the first diaphragm (32); and the voice coil (31) is connected to at least one of the dome (33) and the first diaphragm (32).

3. The sound-generating device according to claim 2, characterized in that: The first inner magnet (21) or the second inner magnet (22) is supported and matched with the first diaphragm (32).

4. The sound generating device according to claim 1, characterized in that: The inner magnetic assembly (20) further comprises a first magnetic conductive member (23), wherein the first magnetic conductive member (23) is arranged between the first magnetic pole and the second magnetic pole.

5. The sound generating device according to claim 1, characterized in that: The sound-generating device further comprises a second magnetic conductive member (50), the outer magnetic assembly (10) and the second inner magnet (22) are both arranged on the second magnetic conductive member (50), and the outer magnetic assembly (10) and the second inner magnet (22) are located between the second magnetic conductive member (50) and the vibration assembly (30), and the second magnetic conductive member (50) covers a port of the magnetic gap (40) away from the voice coil (31).

6. The sound generating device according to claim 1, characterized in that: The outer magnetic assembly (10) comprises a first outer magnet (11) and a second outer magnet (12), the first outer magnet (11) and the second outer magnet (12) enclosing a receiving space, the inner magnetic assembly (20) being arranged in the receiving space, and the inner magnetic assembly (20) being surrounded by the first outer magnet (11) and the second outer magnet (12) as a whole to form the magnetic gap (40); The first outer magnet (11) and the second outer magnet (12) both have the third magnetic pole.

7. The sound generating device according to claim 6, characterized in that: The outer magnetic assembly (10) further comprises a plurality of third magnetic conductive members (13), and the ends of the first outer magnet (11) and the second outer magnet (12) adjacent to the vibration assembly (30) are both covered with the third magnetic conductive members (13).

8. The sound generating device according to claim 6, characterized in that: The outer magnets of two adjacent outer magnet assemblies (10) are connected by an integral molding process, and one of the outer magnets of the two adjacent outer magnet assemblies (10) is the first outer magnet (11) of one outer magnet assembly (10), and the other is the second outer magnet (12) of the other outer magnet assembly (10).

9. The sound generating device according to claim 6, characterized in that: The sound-generating device has a first sound-generating mode. In the first sound-generating mode, the currents flowing through the voice coils (31) of two adjacent vibration components (30) are opposite, so that the vibration directions of the two adjacent vibration components (30) are opposite.

10. An electronic device, characterized in that: The invention comprises a shell and a sound-generating device arranged in the shell, wherein the sound-generating device is the sound-generating device according to any one of claims 1 to 9.

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