Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, the sound production device comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system is connected to the shell, the magnetic circuit system is provided with two magnetic gaps and a magnetic flux port communicating the two magnetic gaps, and the vibration system is connected to the shell. The vibration system comprises a vibrating diaphragm assembly and a voice coil connected to the vibrating diaphragm assembly, the periphery of the vibrating diaphragm assembly is connected to the shell and is opposite to the magnetic circuit system, the voice coil comprises two annular parts and a conducting part connected with the two annular parts, the two annular parts are suspended in the two magnetic gaps respectively, and the conducting part is connected with the two annular parts. And the conduction part is suspended in the magnetic flux opening. According to the sound production device capable of effectively improving the BL value, the size of the voice coil is increased, so that the BL value is improved, and the overall performance and the sound effect loudness are improved.

Description

Technical Field

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

[0002] In recent years, with the rapid development of consumer electronic products, electronic devices such as smart phones and VR devices have been recognized by consumers and widely used. Those skilled in the art have also made corresponding improvements to related supporting products such as headphones to meet the performance requirements of electronic products and meet the needs of consumers for product performance.

[0003] The sound-generating device is an important electroacoustic transducer component in consumer electronic products. It is widely used as a speaker, receiver, earphone, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend. In order to achieve better acoustic performance, the sound-generating device often needs to be equipped with a larger magnetic circuit system with stronger magnetic field strength.

[0004] In the related art, the box space of electronic products is getting smaller and smaller, which results in the size of the magnetic circuit system in the sound-generating device being limited and unable to be enlarged, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound-generating device. Summary of the invention

[0005] The main purpose of the present invention is to provide a sound-generating device and an electronic device, aiming to provide a sound-generating device that effectively improves the BL value. The sound-generating device increases the BL value by increasing the voice coil size, thereby improving the overall performance and sound loudness of the device.

[0006] To achieve the above object, the present invention provides a sound-generating device, comprising:

[0007] shell;

[0008] A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system is provided with two magnetic gaps and a magnetic flux port connecting the two magnetic gaps; and

[0009] A vibration system, the vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly, the periphery of the diaphragm assembly is connected to the housing and is opposite to the magnetic circuit system, the voice coil includes two annular parts and a conductive part connecting the two annular parts, the two annular parts are suspended in the two magnetic gaps respectively, and the conductive part is suspended in the magnetic flux port.

[0010] In one embodiment, the magnetic circuit system includes a magnetic yoke and a common magnetic part, two side magnetic parts and two central magnetic parts provided on the magnetic yoke, the two central magnetic parts are located on opposite sides of the common magnetic part, and each of the central magnetic parts is located between the common magnetic part and one of the side magnetic parts, and is spaced from the common magnetic part and the side magnetic part to cooperate to form a magnetic gap, and the common magnetic part is provided with the magnetic flux port;

[0011] Wherein, the common magnetic portion, the two side magnetic portions and the two central magnetic portions all extend along the first direction.

[0012] In one embodiment, each of the annular portions has a first segment, two second segments and two third segments, the first segment extends along the first direction, the two second segments are respectively connected to the two ends of the first segment and extend along the second direction, the two third segments both extend along the first direction and are arranged along the extension direction of the common magnetic portion, one end of each of the third segments is connected to one end of the second segment away from the first segment, and the other end of each of the third segments is connected to the conductive portion;

[0013] Wherein, the first direction and the second direction are arranged at an angle.

[0014] In one embodiment, the conductive parts include two, both of which are suspended at the magnetic flux opening, and two ends of each of the conductive parts are respectively connected to the two third sections of the two annular parts.

[0015] In one embodiment, the two conducting parts are arranged opposite to each other and in close contact; or, there is a first gap between the two conducting parts, and the distance between the two conducting parts is defined as the length a of the first gap, 0<a≤0.5mm;

[0016] And / or, the connection between the conducting portion and the third section is smoothly transitioned;

[0017] And / or, the connection between the first section and the second section is a smooth transition connection;

[0018] And / or, the connection between the second section and the third section is a smooth transition connection;

[0019] And / or, the two annular parts are symmetrically arranged with the common magnetic part as a symmetry axis;

[0020] And / or, the two central magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis;

[0021] And / or, the two edge magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis;

[0022] And / or, the common magnetic parts include two, the two common magnetic parts are arranged at intervals along the first direction to form the magnetic flux opening between the two common magnetic parts, and the two common magnetic parts are symmetrically arranged with the extension direction of the magnetic flux opening as the symmetry axis.

[0023] In one embodiment, each of the central magnetic parts is provided with a recessed area, and each of the side magnetic parts is provided with a raised part corresponding to the recessed area, and the raised part extends into the recessed area and is spaced from the inner wall of the recessed area to form a magnetic gap connecting the magnetic gap;

[0024] Each of the first sections is provided with a recessed section corresponding to the magnetic gap, and the recessed section is suspended in the magnetic gap.

[0025] In one embodiment, each of the recessed areas penetrates the central magnetic portion along the second direction;

[0026] Each of the recessed sections includes a first edge, a second edge and a third edge connected in sequence, the first edge and the third edge both extend along the second direction and are suspended in the magnetic gap, and the two ends of the first edge and the third edge are respectively connected to the first section and the second edge, the second edge extends along the first direction and is suspended in the magnetic gap, and the second edge is located between the raised portion and the common magnetic portion.

[0027] In one embodiment, the second side is opposite to and closely attached to the third section; or, a second gap is provided between the second side and the third section, and the distance between the second side and the third section is defined as the length b of the second gap, 0<b≤0.5mm;

[0028] And / or, the connection between the first side and the first section is a smooth transition connection;

[0029] And / or, the connection between the third side and the first section is in a smooth transition connection;

[0030] And / or, the connection between the first side and the second side is a smooth transition connection;

[0031] And / or, the connection between the third side and the second side is a smooth transition connection;

[0032] And / or, the two recessed areas are symmetrically arranged with the common magnetic part as the symmetry axis, the two raised parts are symmetrically arranged with the common magnetic part as the symmetry axis, and the two recessed sections are symmetrically arranged with the common magnetic part as the symmetry axis.

[0033] In one embodiment, each of the edge magnetic parts includes a stacked edge magnet and an edge magnetic conductive plate, the edge magnet is connected to the magnetic conductive yoke, and the edge magnetic conductive plate and the housing are an integrally formed structure;

[0034] And / or, the common magnetic part includes a common magnet and a common magnetic conductive plate which are stacked, and the common magnet is connected to the magnetic conductive yoke;

[0035] And / or, each of the central magnetic parts includes a central magnet and a central magnetic conductive plate which are stacked, and the central magnet is connected to the magnetic conductive yoke.

[0036] The present invention further provides an electronic device, which includes the sound-generating device described above.

[0037] The sound-generating device of the technical solution of the present invention accommodates the vibration system and the magnetic circuit system in a shell, and sets the vibration system as a diaphragm assembly and a voice coil connected to the diaphragm assembly, so that the periphery of the diaphragm assembly is connected to the shell, and the voice coil is set as two annular parts and a conductive part connecting the two annular parts, and two magnetic gaps and a magnetic flux opening connecting the two magnetic gaps are provided in the magnetic circuit system, so that the two annular parts of the voice coil are suspended in the two magnetic gaps respectively, and the conductive part is suspended in the magnetic flux opening, so that current is passed through the voice coil, so that the voice coil converts electrical energy into mechanical energy in the magnetic gap and the magnetic flux opening formed by the magnetic circuit system, so as to drive the voice coil to drive the diaphragm assembly to vibrate, thereby achieving sound generation; at the same time, by setting the voice coil as the structure of the two annular parts and the conductive part connecting the two annular parts, the total length of the voice coil is effectively increased, the L value of the voice coil is improved, so that the BL value is effectively improved when the voice coil vibrates in the magnetic field formed by the magnetic circuit system, thereby improving the performance of the whole machine and the loudness of the sound effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a top view of the structure of an embodiment of a sound-generating device provided by the present invention;

[0040] Figure 2 A bottom-up structural schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0041] Figure 3 A schematic cross-sectional view of a common magnetic portion of an embodiment of a sound-generating device provided by the present invention;

[0042] Figure 4 An exploded schematic diagram of an embodiment of a sound-generating device provided by the present invention;

[0043] Figure 5 A schematic structural diagram of an embodiment of a sound-generating device provided by the present invention without the magnetic yoke;

[0044] Figure 6 An exploded schematic diagram of another embodiment of the sound-generating device provided by the present invention;

[0045] Figure 7 A schematic structural diagram of another embodiment of the sound-generating device provided by the present invention without the magnetic yoke;

[0046] Figure 8 for Figure 7 Schematic diagram of part of the structure of the central magnetic circuit system;

[0047] Fig. 9 A schematic structural diagram of an embodiment of a voice coil provided by the present invention;

[0048] Fig.10 A schematic structural diagram of another embodiment of the voice coil provided by the present invention;

[0049] Fig.11 This is a comparison chart of the FR curves of the sound-generating device provided by the present invention and the prior art.

[0050] Description of Figure Numbers:

[0051] 100. Sound-generating device; 1. Housing; 11. First side; 12. Second side; 13. Corner; 2. Magnetic circuit system; 21. Magnetic yoke; 22. Central magnetic part; 221. Central magnet; 222. Central magnetic plate; 223. Concave area; 23. Side magnetic part; 231. Side magnet; 232. Side magnetic plate; 233. Raised part; 234. Magnetic gap; 24. Common magnetic part; 241. Common magnet; 242. Common magnetic plate; 243. Magnetic flux port; 25. Magnetic gap; 3. Vibration system; 31. Diaphragm assembly Components; 311, diaphragm; 3111, inner ring; 3112, folded ring; 3113, fixed portion; 3114, bent portion; 312, vibration plate; 32, voice coil; 321, ring portion; 3211, first section; 3212, second section; 3213, third section; 322, conducting portion; 323, recessed section; 3231, first side; 3232, second side; 3233, third side; 33, centering support; 331, external connection; 332, internal connection; 333, elastic arm; 334, external solder pad.

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

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

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

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

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

[0057] In recent years, with the rapid development of consumer electronic products, electronic devices such as smart phones and VR devices have been recognized by consumers and widely used. Those skilled in the art have also made corresponding improvements to related supporting products such as headphones to meet the performance requirements of electronic products and meet consumers' needs for product performance.

[0058] The sound-generating device is an important electroacoustic transducer component in consumer electronic products. It is widely used as a speaker, receiver, earphone, etc. With the improvement of the performance of electronic products, the improvement of the acoustic performance of the sound-generating device is also an inevitable trend. In order to achieve better acoustic performance, the sound-generating device often needs to be equipped with a larger magnetic circuit system with stronger magnetic field strength.

[0059] In the related art, the box space of electronic products is getting smaller and smaller, which results in the size of the magnetic circuit system in the sound device being limited and unable to be enlarged, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound device. Therefore, how to achieve the best sound effect in an effective space is the pursuit of the application of sound devices.

[0060] Based on the above concepts and problems, the present invention proposes a sound-generating device 100. It can be understood that the sound-generating device 100 is applied to electronic devices, and the electronic devices can be mobile phones, headphones, smart wearable devices, tablet computers, laptop computers, etc., which are not limited here. In this embodiment, the sound-generating device 100 of the present invention adopts a special-shaped voice coil structure under limited space, increases the total length of the voice coil 32, and increases the L value of the voice coil 32 to increase the BL value, thereby greatly improving the performance of the whole machine and the loudness of the sound effect.

[0061] Please refer to Figures 1 to 10 As shown, in an embodiment of the present invention, the sound-generating device 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, wherein the magnetic circuit system 2 is connected to the housing 1, the magnetic circuit system 2 is provided with two magnetic gaps 25 and a magnetic flux opening 243 connecting the two magnetic gaps 25, the vibration system 3 includes a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31, the periphery of the diaphragm assembly 31 is connected to the housing 1 and is opposite to the magnetic circuit system 2, the voice coil 32 includes two annular portions 321 and a conducting portion 322 connecting the two annular portions 321, the two annular portions 321 are suspended in the two magnetic gaps 25 respectively, and the conducting portion 322 is suspended in the magnetic flux opening 243.

[0062] In this embodiment, the sound-generating device 100 may be a sound-generating unit of a speaker, and the speaker may be a micro speaker. It should be noted that the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 are arranged opposite to each other.

[0063] In order to better assemble the magnetic circuit system 2 and the vibration system 3 of the sound generating device 100. In one embodiment, as Figures 2 to 7 As shown, the sound generating device 100 further includes a housing 1 , a magnetic circuit system 2 connected to one end of the housing 1 , and a vibration system 3 connected to the other end of the housing 1 and arranged opposite to the magnetic circuit system 2 .

[0064] It should be noted that the housing 1 is used to install, fix and support components such as the magnetic circuit system 2 and the vibration system 3, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2 and the vibration system 3. It can be understood that the housing 1 can be an integral structure or can be formed by the cooperation of multiple split structures, which is not limited here. The housing 1 in this embodiment can be selected as a square frame or frame structure, that is, the housing 1 has a cavity with openings at both ends, and the magnetic circuit system 2 and the vibration system 3 are respectively connected to the two sides of the housing 1, and are arranged relative to each other, so that the magnetic circuit system 2, the housing 1 and the diaphragm 311 of the vibration system 3 enclose a vibration cavity.

[0065] It can be understood that the sound-generating device 100 is applied to electronic devices, that is, the sound-generating device 100 can be installed in the electronic device through the housing 1. It should be noted that the housing 1 of the sound-generating device 100 can be a housing or box structure independent of the electronic device. In this case, the housing 1 is used to integrate the magnetic circuit system 2 and the vibration system 3 of the sound-generating device 100 into an integral structure, so as to facilitate disassembly and assembly. Of course, the housing 1 of the sound-generating device 100 can also be an integrally formed structure with the housing or box structure of the electronic device, which can effectively improve the structural strength and sealing performance.

[0066] In this embodiment, the housing 1 is used to accommodate and fix the vibration system 3 and the magnetic circuit system 2 and other structures, so that the sound device 100 can be used as an independent component in an electronic device or a sound module, which is not limited here. Of course, in other embodiments, the sound device 100 can also be a module structure, in which case the vibration system 3 and the magnetic circuit system 2 and other structures of the sound unit are installed as multiple independent components on the housing 1 of the module structure, which is not limited here.

[0067] Optionally, the sound-generating device 100 is arranged in a rectangular shape. In this embodiment, the housing 1 of the sound-generating device 100 is optionally arranged in a rectangular shape. Figure 4 , Figure 6 As shown, the housing 1 has two first sides 11 and two second sides 12 connected end to end, the two first sides 11 and the two second sides 12 enclose a rectangular frame structure, and the connection between the first side 11 and the second side 12 forms a corner 13.

[0068] Optionally, the first side 11 of the housing 1 extends along a first direction, the second side 12 extends along a second direction, and the first direction and the second direction are arranged at an angle. In this embodiment, the first side 11 and the second side 12 of the housing 1 are arranged at an angle, and an angle 13 is formed at the connection between the first side 11 and the second side 12. Optionally, the first direction and the second direction are arranged perpendicularly.

[0069] In this embodiment, the diaphragm assembly 31 of the vibration system 3 may be arranged in a square shape. The periphery of the diaphragm assembly 31 is connected to one end of the housing 1 , and the edge magnetic part 23 or the magnetic yoke 21 of the magnetic circuit system 2 is connected to the other end of the housing 1 .

[0070] Understandable, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, the diaphragm assembly 31 includes a diaphragm 311 and a vibration plate 312. The diaphragm 311 includes an inner ring portion 3111, a folded ring portion 3112 and a fixed portion 3113 which are connected in sequence from the inside to the outside. The inner ring portion 3111 is connected to the vibration plate 312, the fixed portion 3113 is connected to the outer shell 1, and the voice coil 32 is connected to the vibration plate 312.

[0071] It should be noted that the diaphragm 311 and the vibration plate 312 of the diaphragm assembly 31 may be integrally formed structural parts, such as integrally injection molded or integrally processed, etc., which is not limited here. Of course, in other embodiments, the diaphragm 311 and the vibration plate 312 of the diaphragm assembly 31 may be separate structures, in which case the vibration plate 312 and the inner ring portion 3111 of the diaphragm 311 may be connected by bonding, which is not limited here.

[0072] In order to further improve the connection stability and waterproof sealing performance between the diaphragm 311 and the housing 1, the outer periphery of the diaphragm 311 is bent and extended toward the housing 1 to form a bent portion 3114, and the bent portion 3114 is connected to the outer wall of the housing 1. In this embodiment, the bent portion 3114 is formed by bending and extending the outer periphery of the fixing portion 3113 of the diaphragm 311 toward the housing 1. Optionally, the inner ring portion 3111, the folded ring portion 3112, the fixing portion 3113 and the bent portion 3114 of the diaphragm 311 are an integrally formed structure.

[0073] In order to adjust the position of the voice coil 32 in the magnetic gap 25, in one embodiment, the vibration plate 312 is provided with a protrusion toward the voice coil 32, one end of the voice coil 32 is connected to the protrusion, and the other end of the voice coil 32 is suspended in the magnetic gap 25. In this way, the voice coil 32 can be placed at a suitable position in the magnetic gap 25 through the protrusion of the vibration plate 312, ensuring that the magnetic flux lines in the magnetic gap 25 pass through the voice coil 32.

[0074] It should be noted that in the related art, the sound-generating device 100 is limited by the box space of the electronic product, resulting in that the size of the magnetic circuit system 2 in the sound-generating device 100 is limited and cannot be increased, thereby reducing the magnetic field strength of the magnetic circuit system, reducing the BL value, and affecting the acoustic performance of the sound-generating device.

[0075] In this embodiment, the voice coil 32 is provided with two annular portions 321 and a conducting portion 322 connecting the two annular portions 321, that is, the voice coil 32 is designed as a special-shaped structure, so that the two annular portions 321 and the conducting portion 322 of the voice coil 32 are used to effectively increase the total length of the voice coil 32, increase the L value of the voice coil 32, and increase the BL value, thereby greatly improving the performance of the whole machine and the sound effect loudness, such as Fig.11 As shown, it can be understood that the sound-generating device 100 of the present invention increases the actual simulated BL value from 0.97 to 1.28, and the BL value is significantly improved, compared with the conventional loudspeaker in the prior art, by setting the voice coil 32 as a special-shaped voice coil.

[0076] It can be understood that by providing two magnetic gaps 25 and a magnetic flux opening 243 connecting the two magnetic gaps 25 in the magnetic circuit system 2, the two annular portions 321 of the voice coil 32 are respectively suspended in the two magnetic gaps 25, and the conductive portion 322 is suspended in the magnetic flux opening 243. In this way, current is passed through the voice coil 32, so that the voice coil 32 converts electrical energy into mechanical energy in the magnetic gaps 25 and the magnetic flux opening 243 formed in the magnetic circuit system 2, so as to drive the voice coil 32 to drive the diaphragm 311 to vibrate, thereby achieving sound generation.

[0077] The sound-generating device 100 of the present invention is configured by accommodating the vibration system 3 and the magnetic circuit system 2 in the housing 1, and configuring the vibration system 3 as a diaphragm assembly 31 and a voice coil 32 connected to the diaphragm assembly 31, so that the periphery of the diaphragm assembly 31 is connected to the housing 1, and configuring the voice coil 32 as two annular portions 321 and a conductive portion 322 connecting the two annular portions 321, and configuring the magnetic circuit system 2 to have two magnetic gaps 25 and a magnetic flux opening 243 connecting the two magnetic gaps 25, so that the two annular portions 321 of the voice coil 32 are respectively suspended in the two magnetic gaps 25, and the conductive portion 322 is suspended in the magnetic flux opening 243, so that current is passed through the voice coil 32, so that the voice coil 32 converts electrical energy into mechanical energy in the magnetic gap 25 and the magnetic flux port 243 formed by the magnetic circuit system 2, so as to drive the voice coil 32 to drive the diaphragm assembly 31 to vibrate, thereby achieving sound production; at the same time, by setting the voice coil 32 as a structure of two annular parts 321 and a conductive part 322 connecting the two annular parts 321, the total length of the voice coil 32 is effectively increased, and the L value of the voice coil 32 is increased, so that the BL value is effectively increased when the voice coil 32 vibrates in the magnetic field formed by the magnetic circuit system 2, thereby improving the performance of the whole machine and the loudness of the sound effect.

[0078] In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 21 and a common magnetic portion 24, two side magnetic portions 23 and two central magnetic portions 22 arranged on the magnetic yoke 21, the two central magnetic portions 22 are located on opposite sides of the common magnetic portion 24, and each central magnetic portion 22 is located between the common magnetic portion 24 and a side magnetic portion 23, and is spaced from the common magnetic portion 24 and the side magnetic portions 23 to cooperate to form a magnetic gap 25, and the common magnetic portion 24 is provided with a connecting magnetic flux opening 243; wherein the common magnetic portion 24, the two side magnetic portions 23 and the two central magnetic portions 22 all extend along the first direction.

[0079] In this embodiment, if Figures 2 to 8As shown, by setting the magnetic circuit system 2 as a magnetic yoke 21 and a common magnetic portion 24, two side magnetic portions 23 and two central magnetic portions 22 arranged on the magnetic yoke 21, the common magnetic portion 24 is arranged at the center of the magnetic yoke 21 and extends along the first direction, and the two central magnetic portions 22 are arranged on the opposite sides of the common magnetic portion 24 and extend along the first direction, and the two side magnetic portions 23 are respectively arranged on the side of the two central magnetic portions 22 facing away from the common magnetic portion 24 and extend along the first direction, so that the common magnetic portion 24, the two side magnetic portions 23 and the two central magnetic portions 22 all extend along the first direction. At the same time, each central magnetic portion 22 is located between the common magnetic portion 24 and a side magnetic portion 23, and is spaced from the common magnetic portion 24 and the side magnetic portion 23 to cooperate to form a magnetic gap 25, and a magnetic flux opening 243 is provided in the common magnetic portion 24, so that the two magnetic gaps 25 are connected through the magnetic flux opening 243, so that the two annular portions 321 of the voice coil 32 are respectively suspended in the two magnetic gaps 25, and the conductive portion 322 is suspended in the magnetic flux opening 243.

[0080] It can be understood that by setting the voice coil 32 as a special-shaped voice coil, the magnetic circuit system 2 is set according to the structure of the voice coil 32, which not only increases the total length of the voice coil 32 and improves the L value of the voice coil 32, but also increases the magnet area of ​​the magnetic circuit system 2, thereby improving the overall performance and sound loudness of the machine.

[0081] In this embodiment, if Figure 3 , Figure 4 , Figure 6 As shown, each side magnetic portion 23 includes a stacked side magnet 231 and a side magnetic conductive plate 232, and the side magnet 231 is connected to the magnetic yoke 21. Optionally, the side magnetic conductive plate 232 and the housing 1 are an integrally formed structure. Each central magnetic portion 22 includes a stacked central magnet 221 and a central magnetic conductive plate 222, and the central magnet 221 is connected to the magnetic yoke 21. The common magnetic portion 24 includes a stacked common magnet 241 and a common magnetic conductive plate 242, and the common magnet 241 is connected to the magnetic yoke 21. It can be understood that the side magnets 231 and the side magnetic conductive plates 232 of the side magnetic portion 23 are stacked along the vibration direction of the vibration system 3, the central magnet 221 and the central magnetic conductive plate 222 of the central magnetic portion 22 are stacked along the vibration direction of the vibration system 3, and the common magnet 241 and the common magnetic conductive plate 242 of the common magnetic portion 24 are stacked along the vibration direction of the vibration system 3.

[0082] In this embodiment, the first side 11 of the shell 1 extends along the first direction, and the second side 12 extends along the second direction. The first side 11 and the second side 12 of the shell 1 are vertically arranged. At this time, the common magnetic part 24, two side magnetic parts 23 and two center magnetic parts 22 of the magnetic circuit system 2 all extend along the first direction, and the two side magnetic parts 23 respectively correspond to the two first side sides 11 of the shell 1. One side magnetic part 23, one center magnetic part 22, the common magnetic part 24, another center magnetic part 22, and another side magnetic part 23 of the magnetic circuit system 2 are arranged at intervals along the second direction.

[0083] It can be understood that each annular portion 321 of the voice coil 32 is disposed around a central magnetic portion 22. Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 and Fig.10 As shown, each annular portion 321 of the voice coil 32 corresponds to a first side 11, and each annular portion 321 extends along the first direction. Optionally, the two annular portions 321 of the voice coil 32 are symmetrically arranged, that is, the two annular portions 321 are symmetrically arranged with the common magnetic portion 24 as the symmetry axis.

[0084] In this embodiment, the two central magnetic parts 22 of the magnetic circuit system 2 are symmetrically arranged with the common magnetic part 24 as the symmetry axis, and the two side magnetic parts 23 are symmetrically arranged with the common magnetic part 24 as the symmetry axis. Such an arrangement can ensure that the two annular parts 321 of the voice coil 32 are in the same magnetic field environment, so that when the magnetic circuit system 2 drives the voice coil 32 to vibrate, the polarization or vibration imbalance of the voice coil 32 can be improved.

[0085] In one embodiment, the common magnetic parts 24 include two common magnetic parts 24 , which are arranged at intervals along the first direction to form a magnetic flux opening 243 between the two common magnetic parts 24 , and the two common magnetic parts 24 are symmetrically arranged with the extension direction of the magnetic flux opening 243 as the symmetry axis.

[0086] In this embodiment, if Figures 3 to 8 As shown, the two common magnetic parts 24 may optionally both extend in the first direction, and the two common magnetic parts 24 are spaced apart in the first direction, so that a magnetic flux opening 243 is formed between the two common magnetic parts 24, that is, the magnetic flux opening 243 extends in the second direction. By arranging the two common magnetic parts 24 in a symmetrical structure, the conducting part 322 of the voice coil 32 is connected to the central position of the two annular parts 321, so that when the magnetic circuit system 2 drives the voice coil 32 to vibrate, the polarization or vibration imbalance of the voice coil 32 can be improved.

[0087] In one embodiment, each annular portion 321 has a first section 3211, two second sections 3212 and two third sections 3213, the first section 3211 extends along the first direction, the two second sections 3212 are respectively connected to the two ends of the first section 3211 and extend along the second direction, the two third sections 3213 both extend along the first direction and are arranged along the extension direction of the common magnetic portion 24, one end of each third section 3213 is connected to one end of a second section 3212 away from the first section 3211, and the other end of each third section 3213 is connected to the conductive portion 322; wherein the first direction and the second direction are arranged at an angle.

[0088] In this embodiment, if Figure 4 , Figure 5 and Fig. 9 As shown, each annular portion 321 of the voice coil 32 may optionally be a rectangular annular structure. The first segment 3211 and the two third segments 3213 of each annular portion 321 extend along the first direction, and the two third segments 3213 are respectively arranged corresponding to the two common magnetic portions 24, that is, the two third segments 3213 are arranged along the first direction, and the two ends of each second segment 3212 are respectively connected to the first segment 3211 and the third segment 3213, and extend along the second direction.

[0089] Optionally, the two third sections 3213 are symmetrically arranged. In this embodiment, the conducting portion 322 is connected to one end of the two third sections 3213 away from the second section 3212 .

[0090] It is understandable that the two third segments 3213 of each annular portion 321 can be connected as one through the conductive portion 322, that is, the two third segments 3213 are connected along the first direction by a line segment. Of course, the two third segments 3213 are spaced apart along the first direction, which is not limited here.

[0091] In this embodiment, the connection between the first section 3211 and the second section 3212 of each annular portion 321 may be smoothly transitioned, the connection between the second section 3212 and the third section 3213 may be smoothly transitioned, and the connection between the conductive portion 322 and the third section 3213 may be smoothly transitioned.

[0092] In one embodiment, the conducting portions 322 include two conducting portions 322 , both of which are suspended from the magnetic flux opening 243 , and two ends of each conducting portion 322 are respectively connected to the two third sections 3213 of the two annular portions 321 .

[0093] In this embodiment, if Figures 3 to 7 , Fig. 9 and Fig.10As shown, by providing two conducting parts 322, the two conducting parts 322 are both suspended on the magnetic flux opening 243, and the two conducting parts 322 are provided in parallel, so that the two ends of each conducting part 322 are respectively connected to the two third sections 3213 of the two annular parts 321, so that the voice coil 32 as a whole is a closed annular structure.

[0094] It can be understood that the voice coil 32 has two first long sides and two second long sides connected end to end, the two first long sides extend along the first direction, the two second long sides extend along the second direction, parts of the two second long sides of the voice coil 32 are recessed close to each other along the first direction to form a recessed area, and each common magnetic portion 24 is located in a recessed area, so that parts of each first long side and two second long sides of the voice coil 32 form an annular portion 321, so that the parts of the two second long sides close to each other and opposite to each other form two conducting portions 322, the first long side forms a first section 3211 of the annular portion 321, the parts of the two second long sides connected to the first long sides and extending along the second direction form a second section 3212 of the annular portion 321, and the parts of the two second long sides extending along the first direction form a third section 3213 of the annular portion 321.

[0095] Optionally, the two conducting portions 322 are arranged opposite to each other and in close contact with each other, that is, the two conducting portions 322 abut against each other.

[0096] In this embodiment, if Figures 3 to 7 , Fig. 9 and Fig.10 As shown, there is a first gap between the two conductive parts 322. That is, the two conductive parts 322 are opposite and spaced apart. It can be understood that the distance between the two conductive parts 322 is defined as the length a of the first gap, 0<a≤0.5mm. Optionally, the length a of the first gap is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., which is not limited here.

[0097] In one embodiment, each central magnetic portion 22 is provided with a recessed area 223, and each side magnetic portion 23 is provided with a protrusion 233 corresponding to the recessed area 223, the protrusion 233 extends into the recessed area 223, and is spaced from the inner wall of the recessed area 223 to form a magnetic gap 234 connected to the magnetic gap 25; each first section 3211 is provided with a recessed section 323 corresponding to the magnetic gap 234, and the recessed section 323 is suspended in the magnetic gap 234.

[0098] In this embodiment, if Figures 6 to 8 , Fig.10As shown, by providing a recessed area 223 on the central magnetic portion 22 and a protruding portion 233 on the side magnetic portion 23, the protruding portion 233 extends into the recessed area 223 and is spaced from the inner wall of the recessed area 223 to form a magnetic gap 234 connected to the magnetic gap 25, and a recessed section 323 is formed in the annular portion 321 of the voice coil 32, so that the recessed section 323 is suspended in the magnetic gap 234, so that the total length of the voice coil 32 can be further increased, the L value of the voice coil 32 can be improved, and the performance of the whole machine and the loudness of the sound effect can be greatly improved.

[0099] It can be understood that the concave section 323 is formed by the first section 3211 of the annular portion 321 of the voice coil 32 being concave along the second direction. Optionally, the shape profile of the concave section 323 is similar to the shape profile of the convex portion 233. In this embodiment, the concave section 323 is suspended in the magnetic gap 234 and is spaced from the inner wall of the concave area 223 and the outer wall of the convex portion 233, so that the voice coil 32 can vibrate in the magnetic gap 234.

[0100] Optionally, the recessed area 223 may be a groove or a through-opening structure formed by the central magnetic portion 22 .

[0101] In one embodiment, each recessed area 223 penetrates the central magnetic portion 22 along the second direction; each recessed section 323 includes a first edge 3231, a second edge 3232 and a third edge 3233 connected in sequence, the first edge 3231 and the third edge 3233 both extend along the second direction and are suspended in the magnetic gap 234, and the two ends of the first edge 3231 and the third edge 3233 are respectively connected to the first section 3211 and the second edge 3232, the second edge 3232 extends along the first direction and is suspended in the magnetic gap 25, and the second edge 3232 is located between the protruding portion 233 and the common magnetic portion 24.

[0102] In this embodiment, if Figures 6 to 8 As shown, the recessed area 223 may be a through-hole structure that passes through the central magnetic part 22 along the second direction. The raised portion 233 of the side magnetic part 23 extends into the recessed area 223 and extends along the second direction to be opposite to and spaced from the common magnetic part 24. At this time, the raised portion 233 of the side magnetic part 23 is opposite to and spaced from the central magnetic part 22 to form a magnetic gap 234, and the raised portion 233 of the side magnetic part 23 is opposite to and spaced from the common magnetic part 24 to form a magnetic gap 25, which is not limited here.

[0103] It can be understood that each recessed area 223 is formed by each first long side of the voice coil 32 being recessed along the second direction. In the present embodiment, each recessed section 323 includes a first side 3231, a second side 3232 and a third side 3233 connected in sequence, the first side 3231 and the third side 3233 both extend along the second direction and are suspended in the magnetic gap 234, that is, between the protruding portion 233 and the central magnetic portion 22, and the second side 3232 extends along the first direction and is suspended in the magnetic gap 25, that is, between the protruding portion 233 and the common magnetic portion 24.

[0104] In this embodiment, the connection between the first side 3231 of each annular portion 321 and the first section 3211 is smoothly transitioned. The connection between the third side 3233 of each annular portion 321 and the first section 3211 is smoothly transitioned. The connection between the first side 3231 of each annular portion 321 and the second side 3232 is smoothly transitioned, and the connection between the third side 3233 and the second side 3232 is smoothly transitioned.

[0105] Optionally, the second side 3232 of each recessed area 223 is opposite to and closely attached to the third section 3213 , that is, the second side 3232 and the third section 3213 are in contact with each other.

[0106] In one embodiment, if Figures 6 to 8 , Fig.10 As shown, there is a second gap between the second side 3232 and the third section 3213. It can be understood that the distance between the second side 3232 and the third section 3213 of each annular portion 321 is defined as the length b of the second gap, 0<b≤0.5mm. Optionally, the length b of the second gap is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., which is not limited here.

[0107] Optionally, the two recessed areas 223 are symmetrically arranged with the common magnetic part 24 as the symmetry axis, the two raised parts 233 are symmetrically arranged with the common magnetic part 24 as the symmetry axis, and the two recessed sections 323 are symmetrically arranged with the common magnetic part 24 as the symmetry axis. It can be understood that such an arrangement can improve the polarization or vibration imbalance of the voice coil 32 when the magnetic circuit system 2 drives the voice coil 32 to vibrate.

[0108] In one embodiment, the vibration system 3 also includes a centering support plate 33, which includes an external connection portion 331, an internal connection portion 332, and an elastic arm portion 333 connecting the external connection portion 331 and the internal connection portion 332. The external connection portion 331 is connected to the outer shell 1, and the internal connection portion 332 is connected to the two annular portions 321, and is provided with an internal solder pad electrically connected to the lead of the voice coil 32.

[0109] In this embodiment, if Figures 2 to 7As shown, by providing the centering support 33, the outer connection portion 331 of the centering support 33 is connected to the housing 1, and the inner connection portion 332 is connected to the two annular portions 321 of the voice coil 32. In this way, the centering support 33 can be used to center the vibration of the voice coil 32, thereby preventing the voice coil 32 from swinging or polarizing during the vibration process. At the same time, the voice coil 32 is connected and conducted with the external circuit through the centering support 33.

[0110] It can be understood that the two ends of the centering support 33 are electrically connected to the lead wire of the voice coil 32 and the external circuit respectively. In this embodiment, the centering support 33 can be arranged at the bottom of the voice coil 32. Of course, the centering support 33 can also be arranged at the top of the voice coil 32, that is, the centering support 33 is located between the voice coil 32 and the diaphragm 311, which is not limited here. Optionally, the centering support 33 can be one or more.

[0111] In one embodiment, the housing 1 has two first sides 11 extending along a first direction and two second sides 12 extending along a second direction, and each annular portion 321 corresponds to a first side 11; the centering support plates 33 include two, and the two centering support plates 33 correspond to the two second sides 12 respectively; wherein the first direction and the second direction are set at an angle.

[0112] In this embodiment, if Figures 4 to 8 As shown, the common magnetic portion 24, the two side magnetic portions 23 and the two central magnetic portions 22 of the magnetic circuit system 2 all extend along the first direction, so that an escape space is formed between the two second side edges 12 of the housing 1 and the magnetic circuit system 2. By arranging two centering supports 33 corresponding to the two second side edges 12 respectively, it is possible to provide an installation space for the centering supports 33 and realize electrical connection between the voice coil 32 and the external circuit through the centering supports 33.

[0113] Of course, in other embodiments, there may be four centering supports 33 , and the four centering supports 33 are respectively disposed corresponding to the four corners 13 of the housing 1 .

[0114] Optionally, the outer connecting portion 331, the elastic arm portion 333 and the inner connecting portion 332 of the centering support 33 can be an integrally formed structure. This can effectively ensure the structural strength of the centering support 33 and simplify the processing steps of the centering support 33. In order to ensure the deformation ability of the centering support 33, the elastic arm portion 333 optionally includes at least one bend. Optionally, the outer connecting portion 331, the elastic arm portion 333 and the inner connecting portion 332 of the centering support 33 are located in the same plane.

[0115] In order to facilitate the electrical connection between the centering support 33 and the voice coil 32, in this embodiment, the inner connection portion 332 of the centering support 33 is provided with an inner pad, and the inner pad is electrically connected to the lead of the voice coil 32. In order to facilitate the connection and conduction between the centering support 33 and the external circuit, in this embodiment, the external connection portion 331 is provided with an outer pad 334 for connecting to the external circuit, that is, the outer pad 334 is electrically connected to the external circuit, which is not limited here.

[0116] In one embodiment, the magnetic yoke 21 is provided with a avoidance area corresponding to the inner connection portion 332. It can be understood that by providing the avoidance area on the magnetic yoke 21, the avoidance area can be used to provide avoidance for the centering support 33 during the vibration process of the voice coil 32, ensuring that the inner connection portion 332 of the centering support 33 does not touch the magnetic yoke 21.

[0117] Optionally, the avoidance area is a recessed groove or a through hole. It can be understood that the avoidance area is a recessed groove, that is, a groove structure formed by the side of the magnetic yoke 21 facing the centering support plate 33 being recessed in a direction away from the centering support plate 33. Alternatively, the avoidance area is a through hole, that is, the through hole passes through the magnetic yoke 21; at the same time, the avoidance area can also be used as an air vent of the sound-generating device 100 to ensure that the airflow in the vibration cavity of the sound-generating device 100 is connected with the external airflow during the vibration of the diaphragm 311, thereby ensuring the balance of internal and external air pressures.

[0118] The sound-generating device 100 of the present invention effectively increases the total length of the voice coil 32 and improves the L value of the voice coil 32 by designing the voice coil 32 as a special-shaped structure. At the same time, the magnetic circuit system 2 is set to extend along the first direction and arranged side by side along the second direction. The common magnetic part 24, two side magnetic parts 23 and two central magnetic parts 22 of the magnetic circuit system 2 are designed to correspond to the voice coil 32 structure. In this way, the magnet area of ​​the magnetic circuit system 2 is effectively increased to improve the BL value, thereby greatly improving the performance of the whole machine and the sound effect loudness. The sound-generating device 100 of the present invention controls the shape of the special-shaped voice coil 32 and the design of the magnetic circuit shape, so that the actual simulation BL value increases from 0.97 to 1.28, and the BL value is significantly improved. The effect is obvious and the implementation is simple. It can be promoted and used on mobile phones, tablets, laptops, and XR, and has strong applicability.

[0119] The present invention also provides an electronic device, which includes the above-mentioned sound-generating device 100. The specific structure of the sound-generating device 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0120] In one embodiment, the electronic device further includes a device housing and a flexible circuit board. The sound-generating device 100 is disposed in the device housing. One end of the flexible circuit board is electrically connected to the sound-generating device 100, and the other end of the flexible circuit board is used to connect to an external power source.

[0121] It can be understood that the flexible circuit board is used to connect the external circuit to the sound device 100. The flexible circuit board is provided with inner pads and outer pads, the inner pads of the flexible circuit board are connected to the sound device 100, and the outer pads of the flexible circuit board are used to connect to external terminals.

[0122] In this embodiment, the device housing has a cavity, the sound device 100 is disposed in the cavity of the device housing, and at least one end of the flexible circuit board connected to the sound device 100 is located in the cavity of the device housing. Of course, in other embodiments, the flexible circuit board can also be entirely disposed in the cavity of the device housing, which is not limited here.

[0123] It is understandable that the electronic device may be a headset, a mobile phone, a computer, a tablet computer, a smart wearable device, etc., which is not limited here. In the electronic device, the sound device 100 may be assembled into the housing of the electronic device in the form of a module, or may be assembled into the housing of the electronic device in the form of a monomer. The electronic device may be a mobile phone, an MP3, an MP4, a tablet computer, a laptop computer, a headset, a wearable device, etc., which are not listed here one by one.

[0124] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises: shell; A magnetic circuit system, the magnetic circuit system is connected to the housing, the magnetic circuit system is provided with two magnetic gaps and a magnetic flux port connecting the two magnetic gaps; and A vibration system, the vibration system includes a diaphragm assembly and a voice coil connected to the diaphragm assembly, the periphery of the diaphragm assembly is connected to the housing and is opposite to the magnetic circuit system, the voice coil includes two annular parts and a conductive part connecting the two annular parts, the two annular parts are suspended in the two magnetic gaps respectively, and the conductive part is suspended in the magnetic flux port.

2. The sound-generating device according to claim 1, characterized in that: The magnetic circuit system includes a magnetic yoke and a common magnetic part, two side magnetic parts and two central magnetic parts arranged on the magnetic yoke, the two central magnetic parts are located on opposite sides of the common magnetic part, and each of the central magnetic parts is located between the common magnetic part and one of the side magnetic parts, and is spaced from the common magnetic part and the side magnetic part to cooperate to form a magnetic gap, and the common magnetic part is provided with the magnetic flux port; Wherein, the common magnetic portion, the two side magnetic portions and the two central magnetic portions all extend along the first direction.

3. The sound-generating device according to claim 2, characterized in that: Each of the annular portions has a first section, two second sections and two third sections, the first section extends along the first direction, the two second sections are respectively connected to the two ends of the first section and extend along the second direction, the two third sections both extend along the first direction and are arranged along the extension direction of the common magnetic portion, one end of each of the third sections is connected to one end of the second section away from the first section, and the other end of each of the third sections is connected to the conductive portion; Wherein, the first direction and the second direction are arranged at an angle.

4. The sound-generating device according to claim 3, characterized in that: The conducting parts include two, both of which are suspended at the magnetic flux opening, and two ends of each conducting part are respectively connected to the two third sections of the two annular parts.

5. The sound generating device according to claim 4, characterized in that: The two conducting parts are arranged opposite to each other and in close contact; or, there is a first gap between the two conducting parts, and the distance between the two conducting parts is defined as the length a of the first gap, 0<a≤0.5mm; And / or, the connection between the conducting portion and the third section is smoothly transitioned; And / or, the connection between the first section and the second section is a smooth transition connection; And / or, the connection between the second section and the third section is a smooth transition connection; And / or, the two annular parts are symmetrically arranged with the common magnetic part as a symmetry axis; And / or, the two central magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis; And / or, the two edge magnetic parts are symmetrically arranged with the common magnetic part as the symmetry axis; And / or, the common magnetic parts include two, the two common magnetic parts are arranged at intervals along the first direction to form the magnetic flux opening between the two common magnetic parts, and the two common magnetic parts are symmetrically arranged with the extension direction of the magnetic flux opening as the symmetry axis.

6. The sound generating device according to claim 3, characterized in that: Each of the central magnetic parts is provided with a recessed area, and each of the side magnetic parts is provided with a raised part corresponding to the recessed area, the raised part extends into the recessed area and is spaced from the inner wall of the recessed area to form a magnetic gap connected to the magnetic gap; Each of the first sections is provided with a recessed section corresponding to the magnetic gap, and the recessed section is suspended in the magnetic gap.

7. The sound generating device according to claim 6, characterized in that: Each of the recessed areas penetrates the central magnetic portion along the second direction; Each of the recessed sections includes a first edge, a second edge, and a third edge connected in sequence, the first edge and the third edge both extend along the second direction and are suspended in the magnetic gap, and the two ends of the first edge and the third edge are respectively connected to the first section and the second edge, the second edge extends along the first direction and is suspended in the magnetic gap, and the second edge is located between the raised portion and the common magnetic portion.

8. The sound generating device according to claim 7, characterized in that: The second side is opposite to and closely attached to the third section; or, a second gap is provided between the second side and the third section, and the distance between the second side and the third section is defined as the length b of the second gap, 0<b≤0.5mm; And / or, the connection between the first side and the first section is a smooth transition connection; And / or, the connection between the third side and the first section is in a smooth transition connection; And / or, the connection between the first side and the second side is a smooth transition connection; And / or, the connection between the third side and the second side is a smooth transition connection; And / or, the two recessed areas are symmetrically arranged with the common magnetic part as the symmetry axis, the two raised parts are symmetrically arranged with the common magnetic part as the symmetry axis, and the two recessed sections are symmetrically arranged with the common magnetic part as the symmetry axis.

9. The sound generating device according to claim 2, characterized in that: Each of the edge magnetic parts comprises a stacked edge magnet and an edge magnetic conductive plate, the edge magnet is connected to the magnetic conductive yoke, and the edge magnetic conductive plate and the housing are an integrally formed structure; And / or, the common magnetic part includes a common magnet and a common magnetic conductive plate which are stacked, and the common magnet is connected to the magnetic conductive yoke; And / or, each of the central magnetic parts includes a central magnet and a central magnetic conductive plate which are stacked, and the central magnet is connected to the magnetic conductive yoke.

10. An electronic device, characterized in that: The electronic device comprises the sound emitting device according to any one of claims 1 to 9.

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