Sound production device and electronic equipment

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, and particularly relates to a sound production device and electronic equipment, the sound production device comprises a vibration system, the vibration system comprises a diaphragm assembly and a plurality of voice coils, the extension heights of the plurality of voice coils along the vibration direction of the vibration system are the same, and the extension heights of the plurality of voice coils are the same. The plurality of voice coils are respectively provided with a first end and a second end which are oppositely arranged along the axial direction of the voice coils; wherein the number of winding layers of the voice coil wire at the first end of each voice coil is greater than the number of winding layers of the voice coil wire at the second end of each voice coil, the plurality of voice coils comprise first voice coils and second voice coils which are the same in number, the first ends of the first voice coils are connected with the vibrating diaphragm assembly, and the second ends of the second voice coils are connected with the vibrating diaphragm assembly. The second end of the second voice coil is connected with the diaphragm assembly. The voice coil of the utility model can improve the flatness of the BL curve of the sounding device, thereby improving the total harmonic distortion.

Description

Technical Field

[0001] The utility model belongs to the technical field of electroacoustic conversion, and particularly relates to a sounding device and an electronic device. Background Art

[0002] Sound generating units are widely used in portable electronic devices such as mobile phones and laptop computers. With the development of technology, the requirements for the acoustic performance and ultra-thinness of sound generating units in electronic products are also getting higher and higher.

[0003] A sound generating unit generally includes a chassis, a vibration system and a magnetic circuit system mounted on the chassis. A magnetic gap is correspondingly formed in the magnetic circuit system. The vibration system includes a diaphragm and a voice coil assembly connected to the diaphragm and extending into the magnetic gap. The voice coil assembly is energized and drives the diaphragm to vibrate and generate sound under the action of the magnetic field in the magnetic gap. When the input voltage is increased, the vibration amplitude of the voice coil is correspondingly increased. The voice coil vibrates out of the uniform area of the magnetic field in the magnetic gap, so that the BL value of the product of the sound generating unit cannot be kept constant, and the linear relationship of the electro-dynamic effect F = IBL is damaged, resulting in non-linear distortion. Moreover, with the improvement of the performance requirements and ultra-thinness requirements of the sound generating unit, that is, with the reduction of the thickness of the sound generating unit and the increase of the amplitude of the vibration system, the harmonic distortion also increases, thereby affecting the overall performance of the sound generating unit.

[0004] Therefore, in view of the above deficiencies, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a sounding device and an electronic device to solve the problems in the prior art.

[0006] In a first aspect of the present utility model, a sounding device is provided, including a vibration system. The vibration system includes a diaphragm assembly and a plurality of voice coils. The plurality of voice coils have the same extension height along the vibration direction of the vibration system. The plurality of voice coils respectively have a first end and a second end oppositely arranged along their axial directions. Among them, the winding layer number of the voice coil wire at the first end of each voice coil is more than that of the voice coil wire at the second end. The plurality of voice coils include the same number of first voice coils and second voice coils. The first end of the first voice coil is connected to the diaphragm assembly, and the second end of the second voice coil is connected to the diaphragm assembly.

[0007] The sounding device provided by the present utility model may also have the following additional technical features:

[0008] In a specific embodiment of the present utility model, the plurality of voice coils are arranged side by side; or, the plurality of voice coils are coaxially nested.

[0009] In a specific embodiment of the present utility model, the first voice coils and the second voice coils are horizontally arranged side by side alternately.

[0010] In a specific embodiment of the present utility model, each of the voice coils includes at least two winding regions with different numbers of winding layers of voice coil wires, and a stepped portion is formed between two adjacent winding regions.

[0011] In a specific embodiment of the present utility model, the outer contour of the first voice coil is the same as that of the second voice coil.

[0012] In a specific embodiment of the present utility model, the diaphragm assembly includes a diaphragm and a vibrating plate provided on the diaphragm. The diaphragm is provided on the outer periphery of the vibrating plate, and a part of the vibrating plate is recessed towards the direction close to the voice coil to form support portions corresponding to the plurality of voice coils one by one, and each voice coil is connected to the corresponding support portion.

[0013] In a specific embodiment of the present utility model, the diaphragm includes a folding ring portion, an inner fixing portion provided inside the folding ring portion, and an outer fixing portion provided outside the folding ring portion. The inner fixing portion is connected to the vibrating plate, and the recessed direction of the folding ring portion is the same as that of the support portion.

[0014] In a specific embodiment of the present utility model, the sound generating device further includes a magnetic circuit system. The magnetic circuit system is provided with magnetic gaps corresponding to the plurality of voice coils one by one. Among them, the second end of the first voice coil and the first end of the second voice coil are inserted into the corresponding magnetic gaps. Along the arrangement direction of the plurality of voice coils, the winding length of the first voice coil located in the magnetic gap is the same as the winding length of the second voice coil located in the magnetic gap.

[0015] In a specific embodiment of the present utility model, the magnetic circuit system includes a magnetic yoke and a plurality of magnet groups provided on one side of the magnetic yoke close to the diaphragm assembly. Each magnet group includes a first magnetic portion and second magnetic portions provided on both sides of the first magnetic portion. The first magnetic portion and the second magnetic portions are arranged at intervals to form the magnetic gap, and two adjacent magnet groups share one second magnetic portion.

[0016] In the second aspect of the present utility model, an electronic device is further provided, including the sound generating device according to any one of the above.

[0017] By making the vibration system of the sound generating device provided by the embodiments of the present utility model include a diaphragm assembly and a plurality of voice coils, and making the number of winding layers of the voice coil wire at the first end of each voice coil more than that at the second end, and connecting the first end of the first voice coil in the voice coil to the diaphragm assembly and the second end of the second voice coil to the diaphragm assembly, the length of the voice coil wire in the magnetic field can be made more uniform when the voice coil vibrates upward and downward, thereby making the BL curve flatter and the linearity better, and then reducing the total harmonic distortion and improving the sound generating effect of the sound generating device. Brief Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is an exploded view of the sound generating device in the embodiment of the present invention;

[0020] Figure 2 It is a cross-sectional view of the sound generating device in the embodiment of the present invention;

[0021] Figure 3 It is a cross-sectional view of the vibration system in an embodiment of the present invention;

[0022] Figure 4 It is a cross-sectional view of the vibration system in another embodiment of the present invention;

[0023] Figures 5 - 6 It is an arrangement and winding diagram of the voice coil in the embodiment of the present invention.

[0024] Description of the Reference Numerals:

[0025] 100 - Sound generating device;

[0026] 10 - Housing;

[0027] 20 - Vibration system, 21 - Diaphragm assembly, 23 - Diaphragm, 231 - Outer fixing part, 232 - Folded ring part, 233 - Inner fixing part, 24 - Vibration plate, 241 - Bracket part, 25 - Voice coil, 251 - First voice coil, 252 - Second voice coil;

[0028] 30 - Magnetic circuit system, 31 - Magnetic yoke, 32 - First magnetic part, 321 - First magnet, 322 - First magnetic conductive plate, 33 - Second magnetic part, 331 - Second magnet, 332 - Second magnetic conductive plate;

[0029] 40 - Centering support piece. Detailed Description of the Invention

[0030] Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0031] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0032] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0033] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over" and the like. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" the other elements or features. Thus, the exemplary term "below" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are accordingly interpreted.

[0034] Referring to Figures 1 - 6 , a first aspect of the present utility model provides a sound generating device 100, including a vibration system 20, the vibration system 20 including a diaphragm assembly 21 and a plurality of voice coils 25. The plurality of voice coils 25 have the same extension height along the vibration direction of the vibration system 20. The plurality of voice coils 25 respectively have a first end and a second end oppositely arranged along their axial directions. Among them, the number of winding layers of the voice coil wire at the first end of each voice coil 25 is more than that of the voice coil wire at the second end. The plurality of voice coils 25 include the same number of first voice coils 251 and second voice coils 252. The first end of the first voice coil 251 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21.

[0035] The sound generating device 100 specifically includes a housing 10, a vibration system 20 and a magnetic circuit system 30. Among them, the housing 10 is formed as a hollow frame. The vibration system 20 and the magnetic circuit system 30 are respectively connected to opposite sides of the housing 10 and are received in the housing 10. The magnetic circuit system 30 is formed with a magnetic gap having a magnetic field. The voice coil 25 of the vibration system 20 is inserted into the magnetic gap. When the voice coil 25 is energized, it can drive the vibration system 20 to vibrate and generate sound under the drive of the magnetic field.

[0036] The vibration system 20 includes a diaphragm assembly 21 and a plurality of voice coils 25 having the same extension height along the vibration direction of the vibration system 20. The diaphragm assembly 21 is connected to the housing 10. One end of the voice coil 25 is connected to the diaphragm assembly 21, and the other end is correspondingly inserted into the magnetic gap. Thus, the relative acting force between the vibration system 20 and the magnetic circuit system 30 can be improved, and further the sound generating performance of the sound generating device 100 can be improved.

[0037] The voice coil 25 includes the same number of first voice coils 251 and second voice coils 252. Along its axial direction, the number of winding layers of the voice coil wire at the first end of each voice coil 25 is more than that at the second end. And the first end of the first voice coil 251 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21. In this way, when the voice coil 25 vibrates upward and downward, the length of the voice coil wire in the magnetic field can be more uniform, thereby increasing the flatness of BLx (BL: the driving force of the monomer, i.e., the force coefficient, with the unit of Tesla·meter (TM)), and further reducing the total harmonic distortion.

[0038] In the embodiment of the present utility model, the sound generating device 100 is provided by making the vibration system 20 include a diaphragm assembly 21 and a plurality of voice coils 25, and making the number of winding layers of the voice coil wire at the first end of each said voice coil 25 more than that at the second end, and the first end of the first voice coil 251 in the voice coil 25 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21. In this way, when the voice coil 25 vibrates upward and downward, the length of the voice coil wire in the magnetic field can be more uniform, thereby making the BL curve flatter and the linearity better, and then reducing the total harmonic distortion and improving the sound generating effect of the sound generating device.

[0039] In one embodiment, the plurality of voice coils 25 are arranged side by side or the plurality of voice coils 25 are coaxially nested.

[0040] Specifically, the sound generating device 100 is formed into a cuboid structure, its length direction is the long axis, its width direction is the short axis, and its thickness direction is the vibration direction of the vibration system 20.

[0041] When the plurality of voice coils 25 are arranged side by side, the lengths of the plurality of voice coils 25 are basically equal and are all slightly less than the length of the long axis of the sound generating device 100, and they are arranged at intervals along the width direction of the sound generating device 100. And when the number of the first voice coils 251 and the second voice coils 252 is more than one, the first voice coils 251 and the second voice coils 252 are alternately arranged along the short axis direction, or the first voice coils 251 and the second voice coils 252 are symmetrically arranged about the connection line of the midpoints of the two short axes.

[0042] When the plurality of voice coils 25 are coaxially nested, the lengths and widths of the plurality of voice coils 25 are both incrementally set, so as to achieve coaxial nesting. And when the number of the first voice coils 251 and the second voice coils 252 is more than one, the first voice coils 251 and the second voice coils 252 are alternately arranged along the short axis direction, or a plurality of first voice coils 251 are arranged between a plurality of second voice coils 252.

[0043] Preferably, in this embodiment, the plurality of voice coils 25 are arranged side by side.

[0044] In one embodiment, the first voice coil 251 and the second voice coil 252 are arranged side by side horizontally and alternately. In this way, the balance of the driving force of the voice coil 25 can be improved, thereby reducing the influence on the diaphragm assembly 21, ensuring the force balance of the diaphragm assembly 21, and thus reducing harmonic distortion.

[0045] In one embodiment, each voice coil 25 includes at least two winding regions with different numbers of winding layers of voice coil wires, and a step portion is formed between two adjacent winding regions.

[0046] Specifically, at least two winding regions are arranged in sequence in the axial direction of the voice coil 25, wherein the number of winding layers of the winding regions can decrease in sequence. Of course, it can be understood that the number of winding layers of multiple winding regions is not limited to the above arrangement, and can be selected and set according to actual usage requirements.

[0047] In a specific embodiment of the present invention, among two adjacent winding regions of the voice coil 25, the number of winding layers of the winding in the winding region located at the second end is 1 - 7 layers less than the number of winding layers of the winding in the winding region located at the second end. For example, the number of winding layers of the winding in the winding region located at the second end is 3 - 4 layers less than the number of winding layers of the winding in the winding region located at the first end.

[0048] In Figure 5 In the shown specific embodiment, two voice coils 25 are arranged side by side. Each voice coil 25 has two winding regions. The number of winding layers of the winding region located at the first end of one voice coil 25 is 4 layers, and the number of winding layers at the second end is 2 layers. The number of winding layers of the winding region located at the first end of the other voice coil 255 is 2 layers, and the number of winding layers at the second end is 4 layers. In Figure 6 In the shown specific embodiment, two voice coils 25 are arranged side by side. Each voice coil 25 has two winding regions. The number of winding layers of the winding region located at the first end of one voice coil 25 is 4 layers, and the number of winding layers at the second end is 3 layers. The number of winding layers of the winding region located at the first end of the other voice coil 255 is 3 layers, and the number of winding layers at the second end is 4 layers.

[0049] In one embodiment, the outer contour of the first voice coil 251 and the second voice coil 252 is the same. In this way, the driving forces formed on the first voice coil 251 and the second voice coil 252 are substantially the same, which helps to keep the force on the diaphragm assembly 21 balanced and reduce the total harmonic distortion.

[0050] In one embodiment, the diaphragm assembly 21 includes a diaphragm 23 and a vibrating plate 24 provided on the diaphragm 23. The diaphragm 23 is provided on the outer periphery of the vibrating plate 24. Part of the vibrating plate 24 is recessed toward the voice coil 25 to form a support portion 241 corresponding to each of the plurality of voice coils 25, and each voice coil 25 is connected to the corresponding support portion 241.

[0051] Specifically, in the diaphragm assembly 21, the outer periphery of the diaphragm 23 is connected to the housing, so as to connect the vibrating plate 24 and the voice coil 25 connected to the side of the vibrating plate 24 to the housing 10. By forming a bracket portion 241 recessed toward the voice coil 25 on the vibrating plate 24 and connecting the voice coil 25 to the bracket portion 241, the position of the voice coil 25 in the magnetic gap can be further adjusted, so that the voice coil 25 is located in the region where the magnetic induction lines are dense, thereby increasing the driving force between the magnetic circuit system 30 and the voice coil 25 and improving the performance of the sound generating device 100.

[0052] In one embodiment, the diaphragm 23 includes a surround portion 232, an inner fixing portion 233 provided inside the surround portion 232, and an outer fixing portion provided outside the surround portion 232. The inner fixing portion 233 is connected to the vibrating plate 24, and the recessed direction of the surround portion 232 is the same as the recessed direction of the bracket portion 241.

[0053] Specifically, the inner fixing portion 233, the surround portion 232, and the outer fixing portion 231 are all annular. Among them, the outer fixing portion 231 is provided around the periphery of the surround portion 232 and is fixedly connected to the housing 10, thereby realizing the installation of the diaphragm 23. The recessed direction of the surround portion 232 is the same as the recessed direction of the bracket portion 241. Thus, the thickness of the sound generating device 100 along the vibration direction of the vibration system 20 can be reduced, so that the sound generating device 100 can be thinned. Under the same thickness requirement, the vibration space of the vibration system 20 can be increased. The surround portion 232 can be a regular arc structure, such as a semi-circular arc or an elliptical arc. Of course, it can also be an irregular curve. The inner fixing portion 233 is provided along the inner periphery of the surround portion 232 and is used to connect to the vibrating plate 24.

[0054] Of course, the surround portion 232 may further include an outer surround portion protruding outward and an inner surround portion recessed inward, and the outer surround portion is connected to the outer periphery of the inner surround portion.

[0055] In one embodiment, the sound generating device 100 further includes a centering washer 40. One end of the centering washer 40 is connected to the voice coil 25, and the other end is fixed to the housing 10. It itself also has a certain elastic deformation, so as not to affect the normal vibration of the voice coil 25. By providing the centering washer 40, the voice coil 25 can be centered, and the position of the voice coil 25 in the magnetic gap can be further ensured, ensuring that its movement direction is only up and down along its axial direction.

[0056] Specifically, two centering washers 40 are provided, and the two centering washers 40 are arranged at the two short axis ends of the housing 10.

[0057] In one embodiment, the sound-generating device 100 further includes a magnetic circuit system 30 having magnetic gaps corresponding to the plurality of voice coils 25. The second end of the first voice coil 251 and the first end of the second voice coil 252 are inserted into the corresponding magnetic gaps. Along the arrangement direction of the plurality of voice coils 25, the winding length of the first voice coil 251 within the magnetic gap is the same as the winding length of the second voice coil 252 within the magnetic gap. This ensures more uniform force on the diaphragm assembly 21, reduces distortion, and improves sound quality.

[0058] In one embodiment, the magnetic circuit system 30 includes a magnetic yoke 31 and multiple magnet groups arranged on the side of the magnetic yoke 31 close to the diaphragm assembly 21, each magnet group includes a first magnetic portion 32 and a second magnetic portion 33 arranged on both sides of the first magnetic portion 32, the first magnetic portion 32 and the second magnetic portion 33 are arranged at intervals to form a magnetic gap, and two adjacent magnet groups share one second magnetic portion 33.

[0059] Specifically, both the first and second magnetic portions 32, 33 can be bar-shaped, with a length slightly shorter than the long axis of the sound-producing device 100. Along the short axis of the sound-producing device 100, the first and second magnetic portions 32, 33 are alternately arranged, thereby forming parallel or nested magnetic gaps. For example, in the case of two voice coils 25 arranged side by side, there are two first magnetic portions 32 and three second magnetic portions 33, with two first magnetic portions 32 positioned between adjacent second magnetic portions 33. This can form parallel magnetic gaps surrounding the two first magnetic portions 32, or two nested magnetic gaps surrounding the central second magnetic portion 33 and the first magnetic portion 32. Two adjacent magnet groups share a single second magnetic portion 33, thereby reducing the number of second magnetic portions 33, saving production costs, and also reducing the weight of the sound-producing device 100.

[0060] The first magnetic portion 32 includes a first magnet 321 and a first magnetic conductive plate 322. One side of the first magnet 321 is connected to the magnetic yoke 31, and the other side is connected to the first magnetic conductive plate 322. The corresponding second magnetic portion 33 includes a second magnet 331 and a second magnetic conductive plate 332. One side of the second magnet 331 is connected to the magnetic yoke 31, and the other side is connected to the second magnetic conductive plate 332.

[0061] In the magnetic circuit system 30 , the outer periphery of the magnetic yoke 31 is bent to be connected to the housing 10 , or the second magnetic conductive plate 332 is connected to the housing 10 .

[0062] The second aspect of the present invention further provides an electronic device comprising any of the above-described sound-generating devices 100. Since the sound-generating device 100 of the electronic device adopts all the technical solutions of all the above-described embodiments, it at least has the beneficial effects brought by the technical solutions of the above-described embodiments, which will not be described in detail here.

[0063] Here, the electronic device can be an electronic device such as a speaker, a mobile phone, or headphones, and is not limited herein. Of course, the sound generating device 100 can also be applied to a vehicle as an in-vehicle speaker, a consumer speaker, etc.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound generating device, characterized in that, Comprising a vibration system, the vibration system includes a diaphragm assembly and a plurality of voice coils, and the plurality of voice coils have the same extension height along the vibration direction of the vibration system. The plurality of voice coils respectively have a first end and a second end oppositely arranged along their axial directions; wherein, For each of the voice coils, the number of winding layers of the voice coil wire at the first end is more than that of the voice coil wire at the second end. The plurality of voice coils include the same number of first voice coils and second voice coils. The first end of the first voice coil is connected to the diaphragm assembly, and the second end of the second voice coil is connected to the diaphragm assembly.

2. The sound generating device according to claim 1, wherein, The plurality of voice coils are arranged side by side; or, the plurality of voice coils are coaxially nested.

3. The sound generating device according to claim 1, characterized in that, The first voice coils and the second voice coils are horizontally arranged alternately side by side.

4. The sound generating device according to claim 1, wherein, Each of the voice coils includes at least two winding regions with different numbers of voice coil wire winding layers, and a step portion is formed between two adjacent winding regions.

5. The sound generating device according to claim 1, wherein The outer contour of the first voice coil is the same as that of the second voice coil.

6. The sound generating device according to any one of claims 1-5, characterized in that, The diaphragm assembly includes a diaphragm and a vibrating plate provided on the diaphragm. The diaphragm is provided on the outer periphery of the vibrating plate. Part of the vibrating plate is recessed towards the direction close to the voice coils to form bracket portions corresponding to the plurality of voice coils one by one, and each voice coil is connected to the corresponding bracket portion.

7. The sound generating device according to claim 6, wherein, The diaphragm includes a surround portion, an inner fixing portion provided inside the surround portion, and an outer fixing portion provided outside the surround portion. The inner fixing portion is connected to the vibrating plate, and the recessed direction of the surround portion is the same as that of the bracket portion.

8. The sound generating device according to any one of claims 1-5, characterized in that, The sound generating device further includes a magnetic circuit system, and the magnetic circuit system is provided with magnetic gaps corresponding to the plurality of voice coils one by one. Wherein, the second end of the first voice coil and the first end of the second voice coil are inserted into the corresponding magnetic gaps. Along the arrangement direction of the plurality of voice coils, the winding length of the first voice coil located in the magnetic gap is the same as the winding length of the second voice coil located in the magnetic gap.

9. The sound generating device according to claim 8, wherein, The magnetic circuit system includes a magnetic yoke and a plurality of magnet groups provided on the side of the magnetic yoke close to the diaphragm assembly. Each magnet group includes a first magnetic portion and second magnetic portions provided on both sides of the first magnetic portion. The first magnetic portion and the second magnetic portions are arranged at intervals to form the magnetic gap, and two adjacent magnet groups share one second magnetic portion.

10. An electronic device, characterized in that, Comprising the sound generating device according to any one of claims 1-9.

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