Sound producing apparatus and electronic device

Abstract

Disclosed in the present application are a sound producing apparatus and an electronic device. The sound producing apparatus comprises an outer magnetic assembly, an inner magnetic assembly and a vibration assembly, a magnetic gap surrounding the inner magnetic assembly being formed between the outer magnetic assembly and the inner magnetic assembly; the vibration assembly comprises a voice coil, the vibration assembly being supported on the outer magnetic assembly, and the voice coil being suspended in the magnetic gap; the inner magnetic assembly comprises a first inner magnet and a second inner magnet that are stacked in a vibration direction of the voice coil, the magnetic poles opposite to each other of the first inner magnet and the second inner magnet being a first magnetic pole and a second magnetic pole respectively, and the first magnetic pole and the second magnetic pole having the same polarity; the outer magnetic assembly has a third magnetic pole, the third magnetic pole separately cooperating with the first magnetic pole and the second magnetic pole, and the third magnetic pole and the first magnetic pole having opposite polarities.

Description

Sound generating device and electronic device

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411363356.1, filed on September 27, 2024, and entitled "Sound generating device and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the technical field of electronic device design, and particularly relates to a sound generating device and an electronic device. BACKGROUND

[0004] The sound generating device (such as a loudspeaker or a receiver) is a relatively important sound module in an electronic device, and is responsible for the sound generating function of the electronic device. With the improvement of user demand, users have higher requirements for the sound generating performance of the electronic device.

[0005] A sound generating device related to the related art is installed in an electronic device (such as a mobile phone). With the development of the electronic device towards thinness, the internal cavity space of the electronic device is getting smaller and smaller, resulting in that the sound generating device is also designed towards miniaturization. In this case, due to the cramped space of the whole machine of the electronic device and the small internal cavity of the electronic device, the dynamic BL value (i.e. the dynamic coefficient) generated by the magnetic force line cut by the voice coil of the sound generating device is small, and the sound generating device cannot play a good sound performance. In order to improve the dynamic BL value of the sound generating device, the related art increases the current passing through the voice coil, but in this case, the increase of the current passing through the voice coil will bring the problem of large heat generation, which will eventually lead to overheating of the sound generating device during work. SUMMARY

[0006] The present application discloses a sound generating device and an electronic device to solve the problem of poor sound performance caused by the small dynamic BL value of the sound generating device related to the related art.

[0007] To solve the above technical problems, the present application provides the following technical solutions:

[0008] In a first aspect, the present application discloses a sound generating device, and the disclosed sound generating device comprises an outer magnetic assembly, an inner magnetic assembly and a vibration assembly, wherein:

[0009] The outer magnetic assembly and the inner magnetic assembly form a magnetic gap around the inner magnetic assembly, the vibration assembly comprises a voice coil, the vibration assembly is supported on the outer magnetic assembly, and the voice coil is suspended in the magnetic gap;

[0010] The inner magnetic assembly comprises a first inner magnetic body and a second inner magnetic body stacked in the vibration direction of the voice coil, the opposite magnetic poles of the first inner magnetic body and the second inner magnetic body are a first magnetic pole and a second magnetic pole respectively, the first magnetic pole and the second magnetic pole have the same polarity, the outer magnetic assembly has a third magnetic pole, the third magnetic pole cooperates with the first magnetic pole and the second magnetic pole respectively, and the third magnetic pole has opposite polarity to the first magnetic pole.

[0011] In a second aspect, the application discloses an electronic device, which comprises a shell and a sound production device arranged in the shell, and the sound production device is the sound production device of the first aspect.

[0012] The technical scheme adopted by the application can achieve the following technical effects:

[0013] The sound production device disclosed by the embodiment of the application improves the structure of the sound production device in the related art, adjusts the inner magnetic assembly to be the first inner magnetic body and the second inner magnetic body stacked, and makes the polarities of the opposite magnetic poles of the first inner magnetic body and the second inner magnetic body the same, and the polarities of the opposite magnetic poles of the first inner magnetic body and the second inner magnetic body are opposite to the polarities of the magnetic poles on the outer magnetic assembly that cooperate with each other, finally, the magnetic field constructed between the first inner magnetic body and the outer magnetic assembly is superimposed on the magnetic field constructed between the second inner magnetic body and the outer magnetic assembly, and then the magnetic field intensity in the magnetic gap is greatly improved. In this case, when the voice coil passes through the current of the same size as before the improvement, the voice coil receives greater ampere force, and then the dynamic BL value of the sound production device can be improved, so that better sound performance is achieved. At the same time, the sound production device with this structure also does not need to increase the current of the voice coil to increase the dynamic BL value, so that the problem of heat generation caused by the increase of the current of the voice coil can be avoided, and the thermal performance of the sound production device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a cross-sectional view of the sound production device disclosed by the embodiment of the application;

[0015] Fig. 2 is a magnetic circuit schematic diagram of the sound production device disclosed by the embodiment of the application;

[0016] Fig. 3 is an exploded structural schematic diagram of the sound production device disclosed by the embodiment of the application.

[0017] Legend: 10-outer magnetic assembly, 11-first outer magnetic body, 12-second outer magnetic body, 13-third magnetic conducting member, 20-inner magnetic assembly, 21-first inner magnetic body, 22-second inner magnetic body, 23-first magnetic conducting member, 30-vibration assembly, 31-voice coil, 32-first diaphragm, 33-spherical top, 34-second diaphragm, 35-support ring, 40-magnetic gap, 50-second magnetic conducting member, 60-FPC. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be described clearly and completely below with reference to the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0019] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged 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 a category and do not limit the number of objects, for example, the first object can be one or more.

[0020] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] Please refer to FIG. 1 to FIG. 3, the present application discloses a sound generating device, the disclosed sound generating device can be applied to electronic equipment. The disclosed sound generating device can be a loudspeaker, and can also be a receiver, and the embodiments of the present application do not limit the specific type of the sound generating device. The sound generating device disclosed by the embodiments of the present application can include an outer magnetic assembly 10, an inner magnetic assembly 20 and a vibration assembly 30.

[0022] The outer magnetic assembly 10 and the inner magnetic assembly 20 are parts of the sound generating device that provide a magnetic field, 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 around 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 magnetically cooperate, so that the magnetic gap 40 is filled with a magnetic field.

[0023] The vibration assembly 30 is a vibrating part in the sound production device. In a specific sound production process, the vibration of the vibration assembly 30 can push the air to move and thus produce sound. Specifically, the vibration assembly 30 includes a voice coil 31, the vibration assembly 30 is supported on the outer magnetic assembly 10, and the voice coil 31 is suspended in the magnetic gap 40. The voice coil 31 is essentially an electromagnetic coil, and the voice coil 31 can be located in the magnetic gap 40 by surrounding the inner magnetic assembly 20, thereby forming a ring shape that matches the shape of the magnetic gap 40. In a specific sound production process, an electric signal is input into the voice coil 31. Essentially, the electromagnetic coil is energized and can be moved in the magnetic gap 40 by the magnetic field force, thereby driving the entire vibration assembly 30 to vibrate, and ultimately achieving the purpose of pushing the air to move and producing sound. It should be noted that the voice coil 31 is energized to drive the vibration assembly 30 to vibrate and produce sound, which is a known technology and will not be described here.

[0024] In the embodiment of the present application, the inner magnetic assembly 20 can include a first inner magnetic body 21 and a second inner magnetic body 22. The first inner magnetic body 21 and the second inner magnetic body 22 are stacked in the vibration direction of the voice coil 31. The opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 have the same polarity, and the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 are opposite to the poles of the outer magnetic assembly 10 that are matched. Specifically, the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 are a first pole and a second pole, respectively. The first pole and the second pole have the same polarity. The outer magnetic assembly 10 has a third pole. The third pole is matched with the first pole and the second pole, respectively. The third pole is opposite to the first pole, and since the first pole and the second pole have the same polarity, the third pole is also opposite to the second pole.

[0025] For example, as shown in FIG. 2, the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 (i.e., the first pole and the second pole) can both be N poles, and the matched poles of the outer magnetic assembly 10 (i.e., the third pole) can be S poles. In other embodiments, the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 (i.e., the first pole and the second pole) can both be S poles, and the matched poles of the outer magnetic assembly 10 (i.e., the third pole) can be N poles. It should be noted that the embodiment of the present application does not limit the specific polarity of the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22.

[0026] In a specific sound production process, the opposite poles of the first inner magnetic body 21 and the second inner magnetic body 22 (i.e., the first pole and the second pole) can be matched with the opposite poles of the outer magnetic assembly 10 (i.e., the third pole), thereby constructing a stronger magnetic field, which is conducive to improving the strength of the magnetic field in the magnetic gap 40, and ultimately enabling the voice coil 31 moving in the magnetic gap 40 to be subjected to a greater force to vibrate.

[0027] The sound production device disclosed by the embodiment of the present application improves the structure of the sound production device in the related art, adjusts the inner magnetic assembly 20 to be the first inner magnetic body 21 and the second inner magnetic body 22 which are stacked, and makes the first magnetic pole of the first inner magnetic body 21 and the second magnetic pole of the second inner magnetic body 22 opposite and have the same polarity, the polarities 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, finally makes the magnetic field constructed between the first inner magnetic body 21 and the outer magnetic assembly 10 superimposed with the magnetic field constructed between the second inner magnetic body 22 and the outer magnetic assembly 10, and further makes the magnetic field intensity in the magnetic gap 40 greatly improved. In this case, when the voice coil 31 passes the current of the same size as before the improvement, the voice coil 31 receives greater ampere force, and further can improve the dynamic BL value of the sound production device, so as to play a better sound performance. At the same time, the sound production device with this structure also does not need to increase the dynamic BL value by increasing the current of the voice coil 31, and can avoid the heating problem caused by the increase of the current of the voice coil, and is beneficial to improve the thermal performance of the sound production device.

[0028] In order to make the magnetic field of the inner magnetic assembly 20 more gathered in the magnetic gap 40, in an optional scheme, the inner magnetic assembly 20 disclosed by the embodiment of the present application can further include a first magnetic conducting member 23, the first magnetic conducting member 23 can be an iron piece, a steel piece or the like, the embodiment of the present application does not limit the specific material of the first magnetic conducting member 23, as long as it can be made of magnetic conducting material to play the magnetic conducting function. The first magnetic conducting member 23 can be a plate piece, and can also be other shapes, the embodiment of the present application does not limit the specific shape of the first magnetic conducting member 23. The first magnetic conducting member 23 is arranged between the opposite magnetic poles of the first inner magnetic body 21 and the second inner magnetic body 22, that is, between the first magnetic pole and the second magnetic pole, so as to simultaneously guide the magnetic field of the opposite magnetic poles of the first inner magnetic body 21 and the second inner magnetic body 22.

[0029] The sound production device disclosed by the embodiment of the present application can further comprise a second magnetic conducting member 50. The second magnetic conducting member 50 plays a role of conducting magnetism. Similarly, the embodiment of the present application does not limit the specific material and shape of the second magnetic conducting member 50. The outer magnetic assembly 10 and the second inner magnetic body 22 are both arranged on the second magnetic conducting member 50, and the outer magnetic assembly 10 and the second inner magnetic body 22 are located between the second magnetic conducting member 50 and the vibration assembly 30. Specifically, the second magnetic conducting member 50 is used to guide the magnetic field between the bottom end of the second inner magnetic body 22 (i.e. the end away from the second magnetic pole) and the bottom end of the outer magnetic assembly 10, so that the magnetic field between them is filled more in the magnetic gap 40. The first magnetic conducting member 23 is used to guide the magnetic field between the bottom end of the first inner magnetic body 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), and the magnetic field between the top end of the second inner magnetic body 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 between them is filled more in the magnetic gap 40, and thus the voice coil 31 is subjected to a greater force in the magnetic gap 40, and finally the dynamic BL value of the sound production device can be further improved.

[0030] In this case, the second magnetic conducting member 50 can serve as a base, and thus provides a mounting basis for the outer magnetic assembly 10 and the inner magnetic assembly 20. In further embodiments, the second magnetic conducting member 50 can cover the end of the magnetic gap 40 away from the voice coil 31. Specifically, the second magnetic conducting member 50 can cover the bottom end of the magnetic gap 40 away from the voice coil 31, and the voice coil 31 can be inserted into the magnetic gap 40 from the top end of the magnetic gap 40 to vibrate under force. It should be noted that the top end of the magnetic gap 40 and the bottom end of the magnetic gap 40 are two opposite ends of the magnetic gap 40. This structure can avoid foreign matter from invading the magnetic gap 40 from the bottom end of the magnetic gap 40, and thus can avoid the adverse effects of the invading foreign matter on the vibration of the voice coil 31.

[0031] In the embodiment of the present application, the outer magnetic assembly 10 can be an integral annular structure and cannot be disassembled. In other embodiments, the outer magnetic assembly 10 can include a first outer magnetic body 11 and a second outer magnetic body 12, for example, at least one of the first outer magnetic body 11 and the second outer magnetic body 12 is a semi-annular structure. The first outer magnetic body 11 and the second outer magnetic body 12 can only contact and abut to form a structure surrounding the inner magnetic assembly 20. Specifically, the first outer magnetic body 11 and the second outer magnetic body 12 enclose a containing space, the inner magnetic assembly 20 is arranged in the containing space, and the inner magnetic assembly 20 is surrounded by the whole formed by the first outer magnetic body 11 and the second outer magnetic body 12 to form a magnetic gap 40. Such a structure facilitates assembly and facilitates individual replacement after partial damage of the components, which is conducive to reducing maintenance costs. In other embodiments, the first outer magnetic body 11 and the second outer magnetic body 12 can also be connected by adhesion, connectors, clamping, etc. to achieve cooperation, and are not limited to the contact listed.

[0032] Specifically, the opposite magnetic poles of the first inner magnetic body 21 and the second inner magnetic body 22 can be opposite in polarity to the magnetic poles on the first outer magnetic body 11, and the opposite magnetic poles of the first inner magnetic body 21 and the second inner magnetic body 22 can be opposite in polarity to the magnetic poles on the second outer magnetic body 12. That is, in this embodiment, the first outer magnetic body 11 and the second outer magnetic body 12 can each have a third magnetic pole.

[0033] In other embodiments, the outer magnetic assembly 10 can further include a plurality of third magnetic conductive members 13, and the end of the first outer magnetic body 11 and the second outer magnetic body 12 adjacent to the vibration assembly 30 (i.e. the end where the third magnetic pole is located) can be covered with a third magnetic conductive member 13. The third magnetic conductive member 13 is used to guide the magnetic field of the top end of the first outer magnetic body 11 and the second outer magnetic body 12, so that the magnetic field of the top end of the first outer magnetic body 11 and the second outer magnetic body 12 (i.e. the end adjacent to the voice coil 31, which is also the end where the third magnetic pole is located) is filled more in the magnetic gap 40, which is conducive to improving the force of the voice coil 31 in the magnetic gap 40, which can further improve the dynamic BL value of the sound generating device.

[0034] In the embodiment of the present application, the outer magnetic assembly 10, the inner magnetic assembly 20 and the vibration assembly 30 can each be one or multiple, and in the embodiments where they are multiple, the outer magnetic assembly 10, the inner magnetic assembly 20 and the vibration assembly 30 can be one-to-one corresponding cooperation.

[0035] In the embodiment where the plurality of outer magnetic assemblies 10, the plurality of inner magnetic assemblies 20 and the plurality of vibration assemblies 30 are provided, the outer magnets of two adjacent outer magnetic assemblies 10 can be connected by an integral process, so that the integral disassembly can be realized, and the workload of disassembling them can be reduced. 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, as shown in FIG. 3.

[0036] In one embodiment, the plurality of outer magnetic assemblies 10, the plurality of inner magnetic assemblies 20 and the plurality of vibration assemblies 30 are provided, 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 assemblies 30 are opposite, so that the vibration directions of the two adjacent vibration assemblies 30 are opposite. In this case, the sound waves generated by the two adjacent vibration assemblies 30 are opposite in phase, and can be mutually offset at a long distance, so that the sound generating device can have a sound leakage prevention function.

[0037] In another embodiment, the plurality of outer magnetic assemblies 10, the plurality of inner magnetic assemblies 20 and the plurality of vibration assemblies 30 are provided, 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 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 are the same in phase, so that they can be superimposed to realize the strengthening of the sound waves, achieve the purpose of increasing the sound size, and make the sound generating device have better external performance.

[0038] In an optional scheme, the two outer magnetic assemblies 10, the two inner magnetic assemblies 20 and the two vibration assemblies 30 are provided, and the two outer magnetic assemblies 10, the two inner magnetic assemblies 20 and the two vibration assemblies 30 can be left-right symmetrical along the same axis of symmetry. The power BL value and the force order of the sound generating device with this structure have good symmetry, which is beneficial to optimize the noise.

[0039] In the embodiments of the present application, the structure of the vibration assembly 30 can be various, as long as it can be supported on the outer magnetic assembly 10 and vibrate with the voice coil 31 to emit sound when the voice coil 31 is forced. As shown in FIG. 1 and FIG. 3, in an alternative, the vibration assembly 30 includes a first diaphragm 32, a dome 33 and a second diaphragm 34, which are all 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 with 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 with 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. In this structure, the vibration assembly 30 is designed to include the first diaphragm 32 inside the dome 33 and the second diaphragm 34 outside the dome 33, thereby forming two vibration bodies, and compared with a single diaphragm, the vibration assembly 30 of this structure can reduce the resonance frequency of the sound emitting device. The lower the resonance frequency of the sound emitting device, the better the response of the sound emitting device at low frequency, thereby enabling the sound emitting device to effectively emit sound at a lower frequency. This is beneficial to the application of the sound emitting device in application scenarios that require enhanced bass effect, such as home theaters, bass speakers, etc.

[0040] In further embodiments, the first inner magnet 21 or the second inner magnet 22 disclosed in the embodiments of the present application can be supported in cooperation with the first diaphragm 32, thereby improving 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, thereby achieving the effect of one thing serving two purposes.

[0041] In the embodiments of the present application, the first inner magnet 21, the second inner magnet 22, the first outer magnet 11 and the second outer magnet 12 can be the same kind of magnet, or can be different kinds of magnet, which is not limited in the embodiments of the present application. 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 specific material of the same is not limited in the embodiments of the present application.

[0042] The sound emitting device disclosed in the embodiments of the present application can further include an FPC 60, which can correspond to the voice coil 31 one by one, thereby supplying power and transmitting electrical signals to each voice coil 31. Specifically, the FPC 60 can be arranged on the support ring 35, the third magnetic guide 13 and other components, and electrically connected with the corresponding voice coil 31. Of course, the specific installation position of the FPC 60 is not limited in the embodiments of the present application.

[0043] Based on the sound production device disclosed in the embodiments of the present application, an electronic device is disclosed, which can include a housing and a sound production device, the sound production device can be arranged in the housing, and the sound production device can be the sound production device described in the above embodiments.

[0044] The electronic device disclosed in the embodiments of the present application can be a smart phone, a tablet computer, an electronic book reader, a wearable device (for example, a smart watch), an electronic game machine, a VR (Virtual Reality) glasses, or the like, and the embodiments of the present application do not limit the specific type of the electronic device.

[0045] The above embodiments of the present application mainly describe the differences between the embodiments, and the features of the different embodiments can be combined to form more specific embodiments without contradiction, and the details are not described herein for the sake of brevity.

[0046] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A sound production device, comprising an outer magnetic assembly (10), an inner magnetic assembly (20) and a vibration assembly (30), wherein: a magnetic gap (40) is formed between the outer magnetic assembly (10) and the inner magnetic assembly (20), the vibration assembly (30) comprises a voice coil (31), the vibration assembly (30) is supported on the outer magnetic assembly (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) stacked in a vibration direction of the voice coil (31), opposite magnetic poles of the first inner magnet (21) and the second inner magnet (22) are a first magnetic pole and a 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 cooperates with the first magnetic pole and the second magnetic pole respectively, and the third magnetic pole has opposite polarity to the first magnetic pole. The vibration assembly (30) further comprises a first diaphragm (32), a spherical top (33) and a second diaphragm (34), an outer edge of the second diaphragm (34) is supported on the outer magnetic assembly (10) through a support ring (35), an inner edge of the second diaphragm (34) surrounds the spherical top (33), and the inner edge of the second diaphragm (34) is connected with an outer edge of the spherical top (33), an inner edge of the spherical top (33) surrounds the first diaphragm (32), and the inner edge of the spherical top (33) is connected with an edge of the first diaphragm (32), and the voice coil (31) is connected to at least one of the spherical top (33) and the first diaphragm (32). The first inner magnet (21) or the second inner magnet (22) is supported and cooperated with the first diaphragm (32).

2. The sound production device of claim 1, wherein, The inner magnetic assembly (20) further comprises a first magnetic conducting member (23), and the first magnetic conducting member (23) is arranged between the first magnetic pole and the second magnetic pole.

3. The sound production device of claim 2, wherein, The sound production device further comprises a second magnetic conducting member (50), the outer magnetic assembly (10) and the second inner magnet (22) are arranged on the second magnetic conducting member (50), and the outer magnetic assembly (10) and the second inner magnet (22) are located between the second magnetic conducting member (50) and the vibration assembly (30), and the second magnetic conducting member (50) covers an end of the magnetic gap (40) away from the voice coil (31).

4. The sound production device of claim 1, wherein, 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) enclose a containing space, the inner magnetic assembly (20) is arranged in the containing space, and the inner magnetic assembly (20) is surrounded by the whole formed by the first outer magnet (11) and the second outer magnet (12) to form the magnetic gap (40).

5. The sound production device of claim 1, wherein, The first outer magnet (11) and the second outer magnet (12) both have the third magnetic pole.

6. The sound production device of claim 1, wherein, ​ ​ 7. The sound production device of claim 6, wherein, The outer side magnetic assembly (10) further comprises a plurality of third magnetic conductive members (13), and the first outer side magnet (11) and the second outer side magnet (12) are covered with the third magnetic conductive members (13) at the end adjacent to the vibration assembly (30).

8. The sound production device of claim 6, wherein, The outer side magnets of two adjacent outer side magnetic assemblies (10) are connected through an integral forming process, one of the outer side magnets of the two adjacent outer side magnetic assemblies (10) is the first outer side magnet (11) of one outer side magnetic assembly (10), and the other is the second outer side magnet (12) of the other outer side magnetic assembly (10).

9. The sound production device of claim 6, wherein, The sound production device has a first sound production mode, in which the current of the voice coil (31) of two adjacent vibration assemblies (30) is opposite, so that the vibration directions of the two adjacent vibration assemblies (30) are opposite. 10.An electronic device comprising a housing and a sound production device arranged in the housing, the sound production device being any one of the sound production devices in claims 1-9.

Images